A sulfonic acid-based naphthylazo dye used as a coloring agent for foodstuffs and medicines and as a dye and chemical indicator. It was banned by the FDA in 1976 for use in foods, drugs, and cosmetics. (From Merck Index, 11th ed)
The reaction of two molecular entities via oxidation usually catalyzed by a transition metal compound and involving dioxygen as the oxidant.
Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
Solution titration in which the end point is read from the electrode-potential variations with the concentrations of potential determining ions. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Electric conductors through which electric currents enter or leave a medium, whether it be an electrolytic solution, solid, molten mass, gas, or vacuum.
Ketonic amines prepared from the condensation of a ketone with formaldehyde and ammonia or a primary or secondary amine. A Mannich base can act as the equivalent of an alpha,beta unsaturated ketone in synthesis or can be reduced to form physiologically active amino alcohols.
The study of chemical changes resulting from electrical action and electrical activity resulting from chemical changes.
Elements with partially filled d orbitals. They constitute groups 3-12 of the periodic table of elements.
Any normal or abnormal coloring matter in PLANTS; ANIMALS or micro-organisms.
Release of oil into the environment usually due to human activity.
The layer of pigment-containing epithelial cells in the RETINA; the CILIARY BODY; and the IRIS in the eye.
Exclusive legal rights or privileges applied to inventions, plants, etc.
Photosensitive protein complexes of varied light absorption properties which are expressed in the PHOTORECEPTOR CELLS. They are OPSINS conjugated with VITAMIN A-based chromophores. Chromophores capture photons of light, leading to the activation of opsins and a biochemical cascade that ultimately excites the photoreceptor cells.
Complex petroleum hydrocarbons consisting mainly of residues from crude oil distillation. These liquid products include heating oils, stove oils, and furnace oils and are burned to generate energy.
Naturally occurring complex liquid hydrocarbons which, after distillation, yield combustible fuels, petrochemicals, and lubricants.
A form of pneumoconiosis resulting from inhalation of dust containing crystalline form of SILICON DIOXIDE, usually in the form of quartz. Amorphous silica is relatively nontoxic.
An interactive process whereby members of a community are concerned for the equality and rights of all.
The exposure to potentially harmful chemical, physical, or biological agents that occurs as a result of one's occupation.
A diffuse parenchymal lung disease caused by inhalation of dust and by tissue reaction to their presence. These inorganic, organic, particulate, or vaporized matters usually are inhaled by workers in their occupational environment, leading to the various forms (ASBESTOSIS; BYSSINOSIS; and others). Similar air pollution can also have deleterious effects on the general population.
A form of pneumoconiosis caused by inhalation of asbestos fibers which elicit potent inflammatory responses in the parenchyma of the lung. The disease is characterized by interstitial fibrosis of the lung, varying from scattered sites to extensive scarring of the alveolar interstitium.
The repetitive uterine contraction during childbirth which is associated with the progressive dilation of the uterine cervix (CERVIX UTERI). Successful labor results in the expulsion of the FETUS and PLACENTA. Obstetric labor can be spontaneous or induced (LABOR, INDUCED).
A cytosolic carbonic anhydrase isoenzyme primarily expressed in ERYTHROCYTES, vascular endothelial cells, and the gastrointestinal mucosa. EC 4.2.1.-
Liquid formulations for the nutrition of infants that can substitute for BREAST MILK.
Software used to locate data or information stored in machine-readable form locally or at a distance such as an INTERNET site.
Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed.
A condition in which the FORAMEN OVALE in the ATRIAL SEPTUM fails to close shortly after birth. This results in abnormal communications between the two upper chambers of the heart. An isolated patent ovale foramen without other structural heart defects is usually of no hemodynamic significance.
Oxy acids of sulfur with the general formula RSOH, where R is an alkyl or aryl group such as CH3. They are often encountered as esters and halides. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Changing an open-chain hydrocarbon to a closed ring. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)
Covalent attachment of HALOGENS to other compounds.
A technology, in which sets of reactions for solution or solid-phase synthesis, is used to create molecular libraries for analysis of compounds on a large scale.
A monoamine oxidase inhibitor with antihypertensive properties.
(2S-(2 alpha,3 beta,4 beta))-2-Carboxy-4-(1-methylethenyl)-3-pyrrolidineacetic acid. Ascaricide obtained from the red alga Digenea simplex. It is a potent excitatory amino acid agonist at some types of excitatory amino acid receptors and has been used to discriminate among receptor types. Like many excitatory amino acid agonists it can cause neurotoxicity and has been used experimentally for that purpose.
An isomerase that catalyzes the conversion of chorismic acid to prephenic acid. EC 5.4.99.5.
A space which has limited openings for entry and exit combined with unfavorable natural ventilation such as CAVES, refrigerators, deep tunnels, pipelines, sewers, silos, tanks, vats, mines, deep trenches or pits, vaults, manholes, chimneys, etc.
A group of thermoplastic or thermosetting polymers containing polyisocyanate. They are used as ELASTOMERS, as coatings, as fibers and as foams.
Supplying a building or house, their rooms and corridors, with fresh air. The controlling of the environment thus may be in public or domestic sites and in medical or non-medical locales. (From Dorland, 28th ed)
Containers, packaging, and packaging materials for processed and raw foods and beverages. It includes packaging intended to be used for storage and also used for preparation of foods such as microwave food containers versus COOKING AND EATING UTENSILS. Packaging materials may be intended for food contact or designated non-contact, for example, shipping containers. FOOD LABELING is also available.
Form in which product is processed or wrapped and labeled. PRODUCT LABELING is also available.
Skin irritant and allergen used in the manufacture of polyurethane foams and other elastomers.
A colorless, odorless, highly water soluble vinyl monomer formed from the hydration of acrylonitrile. It is primarily used in research laboratories for electrophoresis, chromatography, and electron microscopy and in the sewage and wastewater treatment industries.
Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).
Reagents with two reactive groups, usually at opposite ends of the molecule, that are capable of reacting with and thereby forming bridges between side chains of amino acids in proteins; the locations of naturally reactive areas within proteins can thereby be identified; may also be used for other macromolecules, like glycoproteins, nucleic acids, or other.
Implants constructed of materials designed to be absorbed by the body without producing an immune response. They are usually composed of plastics and are frequently used in orthopedics and orthodontics.
Colorless, odorless crystals that are used extensively in research laboratories for the preparation of polyacrylamide gels for electrophoresis and in organic synthesis, and polymerization. Some of its polymers are used in sewage and wastewater treatment, permanent press fabrics, and as soil conditioning agents.

Purification and characterization of a novel peroxidase from Geotrichum candidum dec 1 involved in decolorization of dyes. (1/1159)

A peroxidase (DyP) involved in the decolorization of dyes and produced by the fungus strain Geotrichum candidum Dec 1 was purified. DyP, a glycoprotein, is glycosylated with N-acetylglucosamine and mannose (17%) and has a molecular mass of 60 kDa and an isoelectric point (pI) of 3.8. The absorption spectrum of DyP exhibited a Soret band at 406 nm corresponding to a hemoprotein, and its Na2S2O4-reduced form revealed a peak at 556 nm that indicates the presence of a protoheme as its prosthetic group. Nine of the 21 types of dyes that were decolorized by Dec 1 cells were decolorized by DyP; in particular, anthraquinone dyes were highly decolorized. DyP also oxidized 2,6-dimethoxyphenol and guaiacol but not veratryl alcohol. The optimal temperature for DyP activity was 30 degrees C, and DyP activity was stable even after incubation at 50 degrees C for 11 h.  (+info)

Enhanced fatty streak formation in C57BL/6J mice by immunization with heat shock protein-65. (2/1159)

Recent data suggest that the immune system is involved in atherogenesis. Thus, interest has been raised as to the possible antigens that could serve as the initiators of the immune reaction. In the current work, we studied the effects of immunization with recombinant heat shock protein-65 (HSP-65) and HSP-65-rich Mycobacterium tuberculosis (MT) on early atherogenesis in C57BL/6J mice fed either a normal chow diet or a high-cholesterol diet (HCD). A rapid, cellular immune response to HSP-65 was evident in mice immunized with HSP-65 or with MT but not in the animals immunized with phosphate-buffered saline (PBS) alone. Early atherosclerosis was significantly enhanced in HCD-fed mice immunized with HSP-65 (n=10; mean aortic lesion size, 45 417+/-9258 microm2) or MT (n=15; 66 350+/-6850 microm2) compared with PBS-injected (n=10; 10 028+/-3599 microm2) or nonimmunized (n=10; 9500+/-2120 microm2) mice. No fatty streak lesions were observed in mice fed a chow diet regardless of the immunization protocol applied. Immunohistochemical analysis of atherosclerotic lesions from the HSP-65- and MT-immunized mice revealed infiltration of CD4 lymphocytes compared with the relatively lymphocyte-poor lesions in the PBS-treated or nonimmunized mice. Direct immunofluorescence analysis of lesions from HSP-65- and MT-immunized mice fed an HCD exhibited extensive deposits of immunoglobulins compared with the fatty streaks in the other study groups, consistent with the larger and more advanced lesions found in the former 2 groups. This model, which supports the involvement of HSP-65 in atherogenesis, furnishes a valuable tool to study the role of the immune system in atherogenesis.  (+info)

ApoA1 reduces free cholesterol accumulation in atherosclerotic lesions of ApoE-deficient mice transplanted with ApoE-expressing macrophages. (3/1159)

Along with apolipoprotein (apo) E, which promotes cholesterol efflux from foam cells, apoA1-containing high density lipoprotein (HDL) is thought to facilitate the transport of cholesterol from lesions. This role for apoA1 was tested in vivo by lethally irradiating apoE-deficient and apoE- plus apoA1-deficient mice and reconstituting them with bone marrow cells isolated from wild-type (WT) mice. ApoE, but not apoA1, was synthesized by the transplanted bone marrow-derived cells. Therefore, this transplantation procedure generated apoE-deficient animals with atherosclerotic lesions that contained both apoE and apoA1 (E/A1 mice) and apoE-deficient animals with lesions that contained apoE but no apoA1 (E/A1o mice). As shown previously, the transplanted WT macrophage-derived apoE dramatically lowered the plasma hypercholesterolemia in both groups. On feeding with an atherogenic diet after transplantation, plasma cholesterol levels were raised in both groups of mice, but the levels in the E/A1 mice at 20 weeks were 2- to 3-fold higher than in E/A1o mice. Immunohistochemical staining verified that apoE was abundant in lesions of both groups, whereas apoA1 was detected in the lesions of E/A1 mice only. Despite a 2- to 3-fold lower total plasma cholesterol in the E/A1o mice, the free cholesterol recovered from isolated aortas was approximately 60% higher and the mean lesion area in serial sections of the aortic valves 45% larger. Therefore, apoA1 reduces free cholesterol accumulation in vivo in atherosclerotic lesions.  (+info)

Azo dyes prevent hydrocarbon-induced leukemia in the rat. (4/1159)

A set of intraveous injections of 7,8,12-trimethylbenz[a]anthracene consistently elicited leukemia in more than 75% of young adult Long-Evans female rats. There was a profound reduction in the incidence of leukemia in companion groups of rats fed small amounts (1--10 mg) of Sudan III or Sudan IV prior to each injection of the carcinogenic hydrocarbon. Repeated feedings of 1 mg of Sudan III induced cumulative increases in the concentration of menadione reductase (EC 1.6.99.2) in liver, whereas protein concentration was unchanged. A single feeding of 1 mg of Sudan III prevented fatal toxicity in all members of large groups of rats injected with massive doses of 7,12-dimethylbenz[a]anthracene, but 50% of the survivors developed leukemia; unprotected rats succumbed in 1--3 days. Sudan III was not carcinogenic under the experimental conditions.  (+info)

Conjugated linoleic acid inhibits differentiation of pre- and post- confluent 3T3-L1 preadipocytes but inhibits cell proliferation only in preconfluent cells. (5/1159)

Conjugated linoleic acid (CLA; 18:2) is a group of isomers (mainly 9-cis, 11-trans and 10-trans, 12-cis) of linoleic acid. CLA is the product of rumen fermentation and can be found in the milk and muscle of ruminants. Animals fed CLA have a lower body fat content. The objective of this study was to establish the possible mechanisms by which CLA affects adipogenesis. 3T3-L1 is a well-established cell line that is used extensively in studying adipocyte biology. These cells typically grow in a culture medium until they reach confluence, at which time they are induced to differentiate by hormonal treatment (d 0). Treatment of 3T3-L1 cells with 25 to 100 micromol/L CLA inhibited differentiation in a dose-dependent manner, while linoleic acid treatment did not differ from DMSO-treated controls. Continuous treatment from d -2, -1, 0 or 2 to d 8 and treatment from d -2 to d 0 and from d 0 to d 2 inhibited differentiation. Differentiation was monitored morphologically (oil Red-O staining), enzymatically (reduction of activity of glycerol-3-phosphate dehydrogenase), and by northern analysis of peroxisome proliferator-activated receptor gamma2, CCAAT/enhancer binding protein alpha and adipocyte specific protein 2 mRNA. CLA inhibited cell proliferation of nonconfluent cells but did not affect cell division of confluent cells, as indicated by 5-bromo-2'-deoxyuridine incorporation and mitochondria metabolism. Therefore, CLA inhibited differentiation before confluence and during induction. However, cellular proliferation was only inhibited prior to induction. These results imply that fat reduction caused by CLA treatment may be attributed to its inhibition of both proliferation and differentiation of preadipocytes in animals.  (+info)

Oxidation of low density lipoprotein and plasma by 15-lipoxygenase and free radicals. (6/1159)

It is generally accepted that the oxidation of pentadiene structures of polyunsaturated lipids by lipoxygenase (LOX) is regio- and enantio-specific, while the free radical-mediated lipid peroxidation gives stereo-random racemic products. It was confirmed that the oxidation of human low density lipoprotein (LDL) by 15-LOX from rabbit reticulocytes gave phosphatidylcholine (PC) and cholesteryl ester (CE) hydroperoxides regio-, stereo- and enantio-specifically. 15-LOX also oxidized human plasma to give specific PC and CE hydroperoxides in spite of the presence of high concentrations of antioxidants. More CE hydroperoxides were formed than PC hydroperoxides from LDL, but the reverse order was observed for plasma oxidation. The S/R ratio of the hydroperoxides decreased during long time incubation but remained significantly larger than one, while free radical-mediated oxidation of LDL and plasma gave racemic products.  (+info)

Fluorimetric determination of aluminum traces in hemodialysis solutions using Mordant Red 19. (7/1159)

A sensitive and accurate method for the spectrofluorimetric determination of trace levels of aluminum in hemodialysis solutions using Mordant Red 19 as the complexation reagent has been developed. The optimal experimental conditions for the concentration of fluorimetric reagent, pH, temperature, and the specific type of matrix are reported. The emission of the fluorescent metal chelate was measured at 555 nm, excitation at 478 nm. Linearity between emission intensity and aluminum concentration was found in the 2-20 ppb range in standard aluminum solutions. Limit of detection was 0.4 ppb. The aluminum amounts in some commercial hemodialysis solutions were determined by means of the extrapolation method. The proposed method proved to be suitable in terms of sensitivity and accuracy for the determination of aluminum in dialysis fluids.  (+info)

The structure and function of acid proteases. V. Comparative studies on the specific inhibition of acid proteases by diazoacetyl-DL-norleucine methyl ester, 1,2-epoxy-3-(p-nitrophenoxy) propane and pepstatin. (8/1159)

Comparative studies have been made on the effects of diazoacetyl-DL-norleucine methyl ester (DAN), 1,2-epoxy-3-(p-nitrophenoxy)propane (EPNP) and pepstatin on acid proteases, including those from Acrocylindrium sp., Aspergillus niger, Aspergillus saitoi, Mucor pusillus, Paecilomyces varioti, Rhizopus chinensis, and Trametes sanguinea, and also porcine pepsin [EC 3.4.23.1] and calf rennin [EC 3.4.23.4] for comparative purposes. These enzymes were rapidly inactivated at similar rates and in 1:1 stiochiometry by reaction with DAN in the presence of cupric ions. The pH profiles of inactivation of these enzymes were similar and had optima at pH 5.5 to 6. They were also inactivated at similar rates by reaction with EPNP, with concomitant incorporation of nearly 2 EPNP molecules per molecule of enzyme. The pH profiles of inactivation were again similar and maximal inactivation was observed at around pH 3 to 4. Some of the EPNP-inactivated enzymes were treated with DAN and shown still to retain reactivity toward DAN. All these enzymes were inhibited strongly by pepstatin, and the reactions of DAN and EPNP with them were also markedly inhibited by prior treatment with pepstatin. These results indicate that the active sites of these enzymes are quite similar and that they presumably have at least two essential carboxyl groups at the active site in common, one reactive with DAN in the presence of cupric ions and the other reactive with EPNP, as has already been demonstrated for porcine pepsin and calf rennin. Pepstatin appears to bind at least part of the active site of each enzyme in a simmilar manner.  (+info)

Streptomyces antibiotic regulatory proteins (SARPs) have been shown to activate transcription by binding to a tandemly arrayed set of heptameric direct repeats located around the −35 region of their cognate promoters. Experimental evidence is presented here showing that vlmI is a regulatory gene in the valanimycin biosynthetic gene cluster of Streptomyces viridifaciens and encodes a protein belonging to the SARP family. The organization of the valanimycin biosynthetic gene cluster suggests that the valanimycin biosynthetic genes are located on three potential transcripts, vlmHORBCD, vlmJKL and vlmA. Disruption of vlmI abolished valanimycin biosynthesis. Western blot analyses showed that VlmR and VlmA are absent from the vlmI mutant and that the production of VlmK is severely diminished. These results demonstrate that the expression of these genes from the three potential transcripts is under the positive control of VlmI. The vlmA-vlmH and vlmI-vlmJ intergenic regions both exhibit a pattern of
Azo compounds are compounds bearing the functional group R−N=N−R′, in which R and R′ can be either aryl or alkyl. IUPAC defines azo compounds as: Derivatives of diazene (diimide), HN=NH, wherein both hydrogens are substituted by hydrocarbyl groups, e.g. PhN=NPh azobenzene or diphenyldiazene.[1] The more stable derivatives contain two aryl groups. The N=N group is called an azo group. The name azo comes from azote, the French name for nitrogen that is derived from the Greek ἀ- (a-, not) + ζωή (zōē, life).. Many textile and leather articles are dyed with azo dyes and pigments.[2]. ...
Streptomyces viridifaciens VlmF protein: a valanimycin-resistance determinant that is probably involved in valanimycin efflux; GenBank AF148322
Photoresponsive block copolymers (PRBCs) containing azobenzenes and other chromophores can be easily prepared by controlled polymerization. Their photoresponsive behaviors are generally based on photoisomerization, photocrosslinking, photoalignment and photoinduced cooperative motions. When the photoactive block forms mesogenic phases upon microphase separation of PRBCs, supramolecular cooperative motion in liquid-crystalline PRBCs enables them to self-organize into hierarchical structures with photoresponsive features. This offers novel opportunities to photocontrol microphase-separated nanostructures of well-defined PRBCs and extends their diverse applications in holograms, nanotemplates, photodeformed devices and microporous films.
Azobenzene reductase also known as azoreductase (EC 1.7.1.6) is an enzyme that catalyzes the chemical reaction: N,N-dimethyl-1,4-phenylenediamine + aniline + NADP+ ⇌ {\displaystyle \rightleftharpoons } 4-(dimethylamino)azobenzene + NADPH + H+ The 3 substrates of this enzyme are N,N-dimethyl-1,4-phenylenediamine, aniline, and nicotinamide adenine dinucleotide phosphate ion, whereas its 3 products are 4-(dimethylamino)azobenzene, nicotinamide adenine dinucleotide phosphate, and hydrogen ion. This enzyme belongs to the family of oxidoreductases, specifically those acting on other nitrogenous compounds as donors with NAD+ or NADP+ as acceptor. The reaction catalyzed by this enzyme proceeds via a ping-pong mechanism by using 2 equivalents of NAD(P)H to reduce one equivalent of the azo compound substrate (for example methyl red where Ar = p-dimethylaniline and Ar = o-benzoic acid) into two equivalents of aniline product: Ar-N=N-Ar + 2(NAD(P)H + H+) ⇌ {\displaystyle \rightleftharpoons } Ar-NH2 + ...
TY - JOUR. T1 - Controlled Photochemical Release of Nitric Oxide from O2-Benzyl-Substituted Diazeniumdiolates. AU - Ruane, PH. AU - Bushan, KM. AU - Pavlos, CM. AU - DSa, RA. AU - Toscano, JP. PY - 2002. Y1 - 2002. M3 - Article. VL - 124. SP - 9806. EP - 9811. JO - Journal of the American Chemical Society. JF - Journal of the American Chemical Society. SN - 0002-7863. IS - 33. ER - ...
Responsive hydrogels hold great potential in controllable drug delivery, regenerative medicine, sensing, etc. We introduced in this study the first example of a photo-responsive protein for hydrogel formation. Based on the first example of the crystal structure of a photo-responsive protein, Arabidopsis thal
Opens the Highlight Feature Bar and highlights feature annotations from the FEATURES table of the record. The Highlight Feature Bar can be used to navigate to and highlight other features and provides links to display the highlighted region separately. Links in the FEATURES table will also highlight the corresponding region of the sequence. More... ...
TY - JOUR. T1 - Photomodulated Supramolecular Chirality in Achiral Photoresponsive Rodlike Compounds Nanosegregated from the Helical Nanofilaments of Achiral Bent-Core Molecules. AU - Kim, Kibeom. AU - Kim, Hanim. AU - Jo, Seong Yong. AU - Araoka, Fumito. AU - Yoon, Dong Ki. AU - Choi, Suk Won. PY - 2015/10/14. Y1 - 2015/10/14. N2 - We prepared a nonchiral mixture of achiral bent-core molecules and photoresponsive rodlike liquid crystalline (LC) molecules. With the help of the isothermal photochemical nematic (N)-isotropic (Iso) phase transition of the photoresponsive rodlike LC molecules, the corresponding phase transition from a dark conglomerate BX phase to another distinguishable dark conglomerate B4 phase took place in the mixture. A large circular dichroism (CD) signal originating from supramolecular chirality was detected in the initial BX phase. On the other hand, the detected CD signal was decreased in the B4 phase after UV irradiation. Interestingly, the decreased CD signal could be ...
In this project, we develop single-cell manipulation surfaces on which cells are rapidly adhered or released on/from desired positions at a single-cell level. On the surfaces coated with photo-responsive materials, multiple cells can be freely patterned and arrayed in a light-guided manner, and accordingly, the properties and interactions of individual cells are accurately investigated in a high-throughput manner. Furthermore, only the desired cells are selectively obtained by light irradiation. This technology is expected to be applied to isolation of cancer cells from blood samples for assessment of cancer therapy and purification of functional cells for cell therapy and tissue engineering.. ...
Whole wheat bread has this weird halo above it, as if well all be thin and healthy if we eat it. Look at these ingredients. Do you honestly think there wont be repercussions from that stuff? Heres a few ingredient breakdowns: azodicarbonamide: Azodicarbonamide is manufactured by the reaction of dihydrazine sulfate and urea under high temperature and pressure. The product of this reaction is then oxidized using sodium chlorate and centrifuged to yield a slurry containing azodicarbonamide. The slurry is washed to remove impurities and dried to obtain the azodicarbonamide powder. This is then micronized to a fine powder before packaging. This product is banned in Europe and Australia because: its killed dogs in experiments, many links to asthma and skin problems, and is found to be a mutagen to bacteria, Sucralose: kills beneficial gut bacteria, highly linked with migraines and headaches, causes cramping and intestinal discomfort, raises blood and has many links to cancer. Carmel Coloring: ...
China Acid Dye Orange 1 manufacturers - Select 2018 high quality Acid Dye Orange 1 products in best price from certified Chinese Fast Orange G manufacturers, Amino C Acid suppliers, wholesalers and factory on Made-in-China.com
TY - JOUR. T1 - Photoswitchable fatty acids enable optical control of TRPV1. AU - Frank, James Allen. AU - Moroni, Mirko. AU - Moshourab, Rabih. AU - Sumser, Martin. AU - Lewin, Gary R.. AU - Trauner, Dirk. PY - 2015/5/22. Y1 - 2015/5/22. N2 - Fatty acids (FAs) are not only essential components of cellular energy storage and structure, but play crucial roles in signalling. Here we present a toolkit of photoswitchable FA analogues (FAAzos) that incorporate an azobenzene photoswitch along the FA chain. By modifying the FAAzos to resemble capsaicin, we prepare a series of photolipids targeting the Vanilloid Receptor 1 (TRPV1), a non-selective cation channel known for its role in nociception. Several azo-capsaicin derivatives (AzCAs) emerge as photoswitchable agonists of TRPV1 that are relatively inactive in the dark and become active on irradiation with ultraviolet-A light. This effect can be rapidly reversed by irradiation with blue light and permits the robust optical control of dorsal root ...
Article Evaluation of manganese peroxidase (MnP) for its ability to resist the ozonization and thereafter decolorize methyl orange. The goal of this study was to determine whether ozone can be used to suppress bacterial growth in operating a white ro...
This study involved ,synthesis of variety of organic compounds [1-6] such as thiol compound ,oxazepine(oxazepam) ,diazepine(diazepam) ,macrocyclic Schiff base ,azo compound which contains electron with donating group and azo compound is containing electron with drawing group and identification of their structures by {(C.H.N)-analysis, H.NMR - spectra , FT.IR - spectra and melting points} and study of their biological activities by biological studies, the data obtained give good supported for synthesized compounds[1-6].
Read β-MnO2 microrods for the degradation of methyl orange under acid condition from aqueous solutions, Research on Chemical Intermediates on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
When adorned with n-octyl chains azobenzene is able to disrupt a variety of calcein-loaded phospholipid liposomes. The levels of lysis observed are dependent both on the lipid headgroup and the conformation of the azobenzene compound. In all cases studied, it has been shown that the cis-conformer is more membrane-interactive than the trans-conformer, suggesting that this class of molecule could be optimised for photo-dynamic therapy applications against infectious pathogens.. ...
Two azobenzene compounds were synthesized and combined in liposomal membranes. Their physico-chemical properties and biocompatibility were evaluated. The safer one was chosen, and its protective function for UVA and UVB were tested in vitro and in vivo. This azobenzene liposomal formulation provided good efficacy with longer shelf life, which could be utilized as a novel kind of repeated UV absorber.
Synthetic control of peptide-based supramolecular assemblies can provide molecular cues to understand protein aggregation while also inspiring the development of novel chemical biology tools to deliver cargoes inside cells. Here we show that the trans-to-cis photoisomerization of a pendant azo-group covalent
We have designed a novel prodrug class that is stable in neutral aqueous media but releases bioactive nitric oxide (NO) on metabolism by esterase. Diazeniumdiolates of structure R(2)N-N(O)=N-OR, in which R = Na, were reacted with BrCH(2)OAc to convert the spontaneously NO-releasing salts 1a (R(2)N …
Photochemically robust materials are desired for organic electronics. In previous research, we demonstrated that organic glasses prepared by physical vapor deposition can be highly stable against photoisomerization reactions if the substrate temperature is chosen correctly. In this work, we further show that the enhanced photostability in vapor-deposited glasses is a general phenomenon exhibited in other molecular systems. For indomethacin (with a carboxylic acid group), we are able to monitor the photo-decarboxylation in situ by measuring the mass loss during the irradiation. For molecule with an azobenzene moiety, we can track photoisomerization by directly measuring the population of trans and cis molecules with the absorption spectrum. For both cases, we show that the rate of photoreaction varies as a function of the substrate temperature during the deposition, and photostability correlates with density of packing. These results provide a molecular level explanation for enhanced ...
University of Canterbury Library This thesis examines the design, synthesis and biological applications of a series of inhibitors which incorporate an azobenzene photoswitch, a peptidyl backbone and a trifluoromethyl ketone warhead. The photoswitch can be isomerised by irradiation with UV or visible light and has been employed to modulate the reactivity of the enzyme. Chapter one gives a brief outline of some of the important areas related to this work. Examples of previously utilised photoswitches as well as some background on serine protease and the uses of fluorine in medicine has been covered. Chapter two outlines the synthesis of the key trifluoromethyl carbinol 2.6 by two different methods. The condensation of a fluorinated aldehyde with a nitroalkane affords an α-nitro trifluoromethyl carbinol which can be reduced to give the desired amine 2.6. Treatment of oxazolones with trifluoroacetic anhydride via a modified Dakin-West reaction gives trifluoromethyl ketones which can be reduced to ...
In 2005, he started to work on his PhD thesis in the group of Prof. Qijin Zhang at the University of Science and Technology of China. In 2007, he was supported by the joint doctoral promotion program of the Max Planck Society and the Chinese Academy of Sciences to work with Prof. Christoph Bubeck at the Max Planck Institute for Polymer Research, Mainz, Germany. In 2010, he received his PhD on photoresponsive composites of azopolymers. From 2010 to 2012, he worked as a postdoc at the Max Planck Institute for Polymer Research. He has been a group leader at the Max Planck Institute for Polymer Research since 2012. He is now heading an experimental group focusing on photoresponsive materials, including photoresponsive polymers and photoresponsive nanomaterials.. ...
TY - JOUR. T1 - In situ control of cell adhesion using photoresponsive culture surface.. AU - Edahiro, Edahiro. AU - Junchi, Junchi. AU - Sumaru, Sumaru. AU - Kimio, Kimio. AU - Tada, Tada. AU - Yuichi, Yuichi. AU - Ohi, Ohi. AU - Katsuhide, Katsuhide. AU - Takagi, Takagi. AU - Toshiyuki, Toshiyuki. AU - Kameda, Kameda. AU - Mitsuyoshi, Mitsuyoshi. AU - Shinbo, Shinbo. AU - Toshio, Toshio. AU - Kanamori, Kanamori. AU - Yoshimi, Yoshimi. AU - Yasuo., Yasuo.. PY - 2005/2/16. Y1 - 2005/2/16. M3 - Article. VL - 6. SP - 970. EP - 974. JO - Biomacromolecules. JF - Biomacromolecules. SN - 1525-7797. ER - ...
Genetically-targeted photocontrol of specific ion channels and receptors We have developed a strategy for conferring light-sensitivity onto specific types of ion channels and receptors in the mammalian brain. This strategy employs synthetic photoswitch compounds that attach covalently to genetically-specified channel or receptor proteins. We have applied this approach to an ever-expanding list of ion channels and receptors, including K+ channels, acetylcholine receptors, and receptors for GABA, the main inhibitory neurotransmitter in the brain. Each of these proteins come in a variety of subtypes, but their individual functions have remained a mystery. By controlling the activity of individual subtypes in the brain with high spatial, temporal and biochemical precision, we are learning what each channel and receptor does for a living in the brain.. Restoring visual function to blind mice with photoswitch molecules We have sought a simple method for bestowing light-sensitivity that does not ...
Principal Investigator:安倍 学, Project Period (FY):2012-06-28 - 2017-03-31, Research Category:Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Project Area:Stimuli-responsive Chemical Species for the Creation of Functional Molecules
The system involved in the reduction of 2-[4-di(2″-bromopropyl)aminophenylazo]benzoic acid (CB10-252), an agent designed for treating primary liver cell cancer, has been demonstrated to be localised mainly in the 108 000 × g supernatant fraction of rat liver homogenate. It is also present in other organs particularly in the spleen. DAB-azoreductase as shown previously is present almost entirely in the microsomal fraction and is found in high concentration only in liver. The pH maxima for CB10-252-azoreductase and DAB-azoreductase were 6.2 and 6.9, respectively. Methylred-azoreductase had properties in most respects similar to CBlO-252-azoreductase implying the importance of the 2-car☐yl group in determining substrate specificity. The use of enzyme inhibitors and other additives showed that CB10-252 was not xanthine oxidase or dihydrofolate reductase. Its activity was not affected by carbon monoxide, phenobarbitone (PB), or 3-methylcholanthrene (MC) pretreatment. Enhancement of the ...
The triplet sensitized photolysis of methylazo-(1,1-dimethyl-2-propene) (3) and azo-bis-(1,1-dimethyl-2-propene) (4) have been examined due to their unique ability to decompose under those conditions. The cis isomer was found by two independent experiments not to lie on the triplet sensitized decomposition pathway. Instead, the azo triplet decomposes directly to radicals plus N(,2). This result encouraged an attempt to observe a SCE (spin correlation effect). By means of a crossover experiment, it was established that the cage effect was substantially lower for triplet sensitized decomposition than for direct irradiation, which is consistent with a SCE. However, the data are also consistent with a number of other hypotheses as well. These alternate proposals are discussed in some detail; from this discussion emerges a hybrid postulate that incorporates an SCE and a long-lived diazenyl radical in the triplet sensitized decomposition of these azo compounds. Two stable cis azoalkanes were ...
A new homologous series (ten compounds) of 2-hydroxy azo compounds SRn (where n:1-10) were synthesized. Their structures were elucidated using spectroscopic techniques such as IR (Infrared), 1H-NMR as well as elemental analysis. Mesomorphic properties and phase transitions were studied using polarized hot stage optical microscopy and differential scanning calorimetry (DSC), and are discussed as a function of the number of carbon atoms in the thioalkyl chain. It has been found that all compounds in the series are pure nematogens.
A luminescence detection device for quantitatively detecting an analyte in a liquid sample, which device comprises (1) a reaction compartment having, along a primary axis, opposite end portions, a first of which is for introduction of fluid reagents and sample into the compartment and the other of which forms a light transmissive aperture of predetermined size, the compartment being suitable to hold a composition which luminesces in response to contact with analyte-containing sample; (2) closure means in said first end portion for admitting a cannula, whereby fluid is introduced into said compartment, and for closing the reaction compartment; (3) a photoresponsive imaging layer; (4) means for associating the photoresponsive imaging layer and the reaction compartment such that the photoresponsive imaging layer is positioned preferably substantially perpendicular to the primary axis of the reaction compartment, at a predetermined distance from the end portion forming the aperture so as to be exposed
Chem. Phys. Lett. 499 (4-6), (2010), pp 247-249; doi: 10.1016/j.cplett.2010.09.051 We examine the influence of the adsorption geometry and electronic coupling between azobenzene-based molecular switches and metal surfaces on their photoisomerization ability. Using the normal-incidence X-ray standing wave technique and large-scale density functional theory (DFT) calculations we determine adsorption geometries for azobenzene and 3,3´,5,5´-tetra-tert-butyl-azobenzene (TBA) adsorbed on Ag(111). Comparing the experimental determined and calculated vertical bonding distances between the photochemically active diazo (-N=N-) moiety of both molecules, reveals that the photoisomerization ability is rather insensitive on the adsorption height, as the N-Ag adsorption distance in TBA/Ag(111) is only 0.14 Å (0.13 Å for the calculated value) larger than the corresponding value for azobenzene. Our DFT calculations predict also similar adsorption heights of the diazo-bridge for azobenzene and TBA adsorbed on ...
Muzikante I.; Gerca L.; Jurgis A.; Gustina D.; Markava E.; Stiller B.; Brehmer L. Light-induced switching effect in Langmuir-Blodgett mono- and multilayers of some azobenzene derivatives . Book of abstr., Electrical and related properties of organic solids, Szklarska Poreba, June 26-30, 1999; Biuletyn Instytutu chemii fizycznej i teoretycznej Politechniki Wroclawskiej, 8: Wroclaw, Poland, 1999; 112 ...
Muzikante I.; Gerca L.; Jurgis A.; Gustina D.; Markava E.; Stiller B.; Brehmer L. Light-induced switching effect in Langmuir-Blodgett mono- and multilayers of some azobenzene derivatives . Book of abstr., Electrical and related properties of organic solids, Szklarska Poreba, June 26-30, 1999; Biuletyn Instytutu chemii fizycznej i teoretycznej Politechniki Wroclawskiej, 8: Wroclaw, Poland, 1999; 112 ...
Article Heterogeneous Fenton-like degradation of an azo dye reactive brilliant orange by the combination of activated carbon–FeOOH catalyst and H|sub|2|/sub|O|sub|2|/sub|. The decoloration of an azo dye reactive brilliant orange (X-GN) by a he...
In October 2011 the EU commission published a recommendation (2011/696/EU) on the definition of nanomaterials. Standardised and certified methodologies (which are essential for accurate material characterisation, comparison and categorisation) to accompany this recommendation are now in development. From the results of analysis by the non-standardised methods currently available, it is conceivable that the substance subject to registration could be considered as falling within the boundaries of the nanomaterial definition. ...
Photoswitchable protein IrisFP molecule. Computer model showing the structure of the reversibly photoswitchable green to red fluorescent protein IrisFP. - Stock Image C035/6331
A major factor in the survival of an organism is its ability to communicate with and respond to its environment. Among the environmental factors is a portion of the electromagnetic spectrum, from...
Buy online METHYL RED 0.1% INDICATOR SOLUTION-125 ml M-05964-125 ml at best price in India on Biomall.in. Request quote for laboratory supplies & life science products, lab chemicals, antibodies, glassware, diagnostics and cell culture products etc. Visit Us Now!
Methyl Red (MR) test is a biochemical test performed on bacterial species to detect the ability of an organism to produce stable acids end products (Mixed-
8 mm, and wavelength 320 nm (UV) or 430 nm (vis) for azobenzene, and 290 nm and 350 nm (reference) for diphenylacetylene. 1 mg/ml diphenylacetylene. Sample size 200 nl Should be constant when all necessary parameters are controlled; recorder sensitivity at 10 mV peak height (mm) = S m/ x 106 sample weight (ng) g Using all parameters as stated, measure the noise level at a blank area of the plate in the nonscan mode. 1 Azobenzene Diphenylacetylene Standard Concn. 3%) Ave. 3. 3. QUALITATIVE SAMPLE IDENTIFICATION BY HPTLC AND SCANNING DENSITOMETRY Separated sample components are identified in HPTLC by coincidence of their migration properties with standards spotted on the same plate and by measuring the in situ absorption or fluorescence spectra of components for comparison with standard spectra. Once the scanner has been shown to be working properly, the sample TLC plates are scanned. The ability to do the simultaneous measurement of several labeled 99mTc species in radiopharmaceutical ...
We find the adsorbate properties to be strongly entropy-driven, as can be judged by a kinetic molecular desorption prefactor of 1024 s-1 that largely exceeds previously reported estimates. We relate this effect to sizable fluctuations across structural and electronic observables. Comparison of our calculations to temperature-programmed desorption measurements demonstrates that finite-temperature effects play a dominant role for flexible molecules in contact with polarizable surfaces, and that recently developed first-principles methods offer an optimal tool to reveal novel collective behavior in such complex systems.. ...
Mourot A, Fehrentz T, Le Feuvres Y, Smith C, Herold C, Dalkara D, Trauner D, Kramer RH. Rapid optical control of nociception with an ion-channel photoswitch. Nature Meth 9:396-402, 2012 ...
Kiran, S.; Ali, S.; Asgher, M., 2013: Degradation and mineralization of azo dye reactive blue 222 by sequential Photo-Fenton's oxidation followed by aerobic biological treatment using white rot fungi
A scientists dream of 3-D projections like those he saw years ago in a Star Wars movie has led to new technology for making animated 3-D table-top objects by structuring light. The new technology uses photoswitch molecules to bring to life 3-D light structures that are viewable from 360 degrees
Literature References: Azo dye. Prepn: E. Nölting, O. Kohn, Ber. 19, 137 (1886). Metabolism: J. L. Radomski, T. J. Mellinger, J. Pharmacol. Exp. Ther. 136, 259 (1962). Toxicity studies: F. C. Lu, A. Lavalle, Can. Pharm. J. 97, 30 (1964); K. J. Davis et al., Toxicol. Appl. Pharmacol. 8, 306 (1966). Determn in maraschino cherries: R. E. Draper, J. Assoc. Off. Anal. Chem. 56, 703 (1973); HPLC determn in lipstick: L. Gagliardi et al., J. Chromatogr. 394, 345 (1987). Review: IARC Monographs 8, 207-214 (1975). See also: Colour Index vol. 4 (3rd ed., 1971) p 4068. ...
Enamine is organizing a research workshop within a framework of the companys participation in a HORIZON-2020 project. The workshop will be held on June 17-19, 2017 in a hotel Rus under the supervision of Prof. I.V.Komarov ...
A public discourse in commemoration of Peter S. Du Ponceau : LL. D., late president of the American philosophical society, delivered before the society pursuant to appointment, on the 25h of October, 1844 ...
There are 4 ten-letter words containing A, B, E and 2Z: AZOBENZENE BEDAZZLING BELSHAZZAR & MORBIDEZZA. Every word on this site can be used while playing scrabble. Build other lists, that begin with or end with letters of your choice.
Photolabile small interfering RNA (siRNA) oligonucleotide duplexes are becoming a powerful tool for photoregulation of gene expression through an RNA interference (RNAi) mechanism
Three photothermal-responsive α-cyclodextrin-based [2]rotaxanes were prepared via the copper(i)-catalyzed azide-alkyne cycloaddition, in which the α-cyclodextrin ring was threaded onto the azobenzene dumbbell component. The difference between the three [2]rotaxanes are the length of the ethylene glycol repeating chains connected between the azobenzene and triazole units in the dumbbell components. The α-cyclodextrin rings in the [2]rotaxanes can be reversibly switched between the azobenzene unit and triazole/ethylene glycol unit driven by the trans-cis isomerization of the azobenzene unit. The trans-to-cis isomerization of the azobenzene unit under UV light irradiation (365 nm) leads the α-cyclodextrin ring moving to the triazole/ethylene glycol unit, while the cis-to-trans isomerization of the azobenzene unit under either visible light irradiation or heating enables the α-cyclodextrin ring shuttling back to the azobenzene station. The different ethylene glycol repeating chains in the ...
Whole wheat bread has this weird halo above it, as if well all be thin and healthy if we eat it. Look at these ingredients. Do you honestly think there wont be repercussions from that stuff? Heres a few ingredient breakdowns: azodicarbonamide: Azodicarbonamide is manufactured by the reaction of dihydrazine sulfate and urea under high temperature and pressure. The product of this reaction is then oxidized using sodium chlorate and centrifuged to yield a slurry containing azodicarbonamide. The slurry is washed to remove impurities and dried to obtain the azodicarbonamide powder. This is then micronized to a fine powder before packaging. This product is banned in Europe and Australia because: its killed dogs in experiments, many links to asthma and skin problems, and is found to be a mutagen to bacteria, Sucralose: kills beneficial gut bacteria, highly linked with migraines and headaches, causes cramping and intestinal discomfort, raises blood and has many links to cancer. Carmel Coloring: ...
Novel visible-light-responsive photocatalysts (CsBi2Nb5O16 and CsBiNb2O7) were prepared using a conventional solid-state reaction method. CsBiNb2O7 and CsBi2Nb5O16 belong to a layered perovskite structure and a defective pyrochlore structure, respectively. These prepared samples have photocatalytic properties to decompose 2-propanol under visible light irradiation.
Information about the carcinogenicity of benzidine (92875) in man and in experimental animals is reviewed, along with results of studies on the metabolism of benzidine and azo compounds, and epidemiological surveys of industries that use azo dyes. The author concludes that workers exposed to benzidine based dyes may metabolically convert the dyes to carcinogenic amine. The number of workers with p
TY - JOUR. T1 - A photoresponsive molecular switch. Reaction of CO 2 and epoxide regulated by aluminum porphyrin-stilbazole system AU - Sugimoto, Hiroshi. AU - Inoue, Shohei. PY - 1998/12/1. Y1 - 1998/12/1. N2 - A novel example of a photoresponsive molecular switch, the light-driven on-off switching system for chemical reaction, composed of aluminum porphyrin and stilbazole is found to regulate the reaction of carbon dioxide and propylene oxide to give propylene carbonate. The reaction is catalyzed by aluminum porphyrin through the photoisomerization of stilbazole. In the dark, the reaction of carbon dioxide and propylene oxide to give propylene carbonate proceeds very slowly for the methoxyaluminum porphyrin - trans-stilbazole system. However, the reaction was accelerated by UV light (λ = 290 - 360 nm), but less so by visible light (λ , 380 nm).. AB - A novel example of a photoresponsive molecular switch, the light-driven on-off switching system for chemical reaction, composed of aluminum ...
Reactivity of organic compounds inside micelles embedded in sol-gel glass. Kinetics of summarization of azobenzene inside C/TAB and SDS micelles
These components are in small enough quantities to be innocuous. But its still a little disconcerting to know that, for example, azodicarbonamide, a flour-bleaching agent that is most commonly used in the manufacture of foamed plastics like in gym mats and the soles of shoes, is found in the McRib bun. The compound is banned in Europe and Australia as a food additive. (Englands Health and Safety Executive classified it as a respiratory sensitizer that potentially contributes to asthma through occupational exposure.) The U.S. limits azodicarbonamide to 45 parts per million in commercial flour products, based on analysis of lab testing.. ...
คุณภาพ Glycerol Monostearate ผู้ผลิต & ผู้ส่งออก - ซื้อ ฮาลาล CAS123-94-9 กลีเซอรอลโมโนสเตียร์ GMS 401 สำหรับไอศกรีม จากประเทศจีน ผู้ผลิต.. Chat Online ...
A scientists dream of 3-D projections like those he saw years ago in a Star Wars movie has led to new technology for making animated 3-D table-top objects by structuring light.. The new technology uses photoswitch molecules to bring to life 3-D light structures that are viewable from 360 degrees, says chemist Alexander Lippert, Southern Methodist University, Dallas, who led the research.. The economical method for shaping light into an infinite number of volumetric objects would be useful in a variety of fields, from biomedical imaging, education and engineering, to TV, movies, video games and more.. Our idea was to use chemistry and special photoswitch molecules to make a 3-D display that delivers a 360-degree view, said Lippert, an assistant professor in the SMU Department of Chemistry. Its not a hologram, its really three-dimensionally structured light.. Key to the technology is a molecule that switches between non-fluorescent and fluorescent in reaction to the presence or absence of ...
Protein photosensors are versatile tools for studying ligand-regulated allostery and signaling. Fundamental to these processes is the amount of energy that can be provided by a photosensor to control downstream signaling events. Such regulation is exemplified by the phototropins--plant serine/threonine kinases that are activated by blue light via conserved LOV (light, oxygen and voltage) domains. The core photosensor of oat phototropin 1 is a LOV domain that interacts in a light-dependent fashion with an adjacent alpha-helix (J alpha) to control kinase activity. We used solution NMR measurements to quantify the free energy of the LOV domain-J alpha-helix binding equilibrium in the dark and lit states. These data indicate that light shifts this equilibrium by approximately 3.8 kcal mol(-1), thus quantifying the energy available through LOV-J alpha for light-driven allosteric regulation. This study provides insight into the energetics of light sensing by phototropins and benchmark values for ...
A novel technology uses a special class of photoactivatable molecules and digital light processing (DLP) to construct light shapes into animated struc
Citation: Ashok Kumar Sundramoorthy †, Sara Mesgari †, Jing Wang †, Raj Kumar ‡, Mahasin Alam Sk. †, Siew Hooi Yeap †, Qing Zhang ‡, Siu Kwan Sze §, Kok Hwa Lim *†, and Mary B. Chan-Park *†, Journal of the Americal Chemical Society, 2013, 135 (15), pp. 5569 - 5581.. Summary: Semiconducting single-walled carbon nanotubes (s-SWNTs) have emerged as a promising class of electronic materials, but the metallic (m)-SWNTs present in all as-synthesized nanotube samples must be removed for many applications. A high selectivity and high yield separation method has remained elusive. A separation process based on selective chemistry appears to be an attractive route since it is usually relatively simple, but more effective chemicals are needed. Here we demonstrate the first example of a new class of dual selective compounds based on polycyclic aromatic azo compounds, specifically Direct Blue 71 (I), for high-purity separation of s-SWNTs at high yield. Highly enriched (93% purity) s-SWNTs ...
COPYRIGHT (C) 2016 KISTI. ALL RIGHTS RESERVED.. 대전광역시 유성구 대학로 245 한국과학기술정보연구원TEL : 042.869.1234 서울시 동대문구 회기로 66NDSL고객센터 : 080.969.4114E-mail : [email protected] ...
This paper outlines the development of DNA-acrylamide hybrid hydrogels that convert light energy to volume changes. The hydrogels are synthesized by a two step method where two separate strands of acrylamide that have been copolymerized with complementary DNA strands are permanently cross-linked using methylenebisacrylamide. The DNA strands are modified with azobenzene duplexes that isomerize from trans to cis when irradiated with UV light. Under visible light conditions, the DNA strands are allowed to hybridize creating extra cross-links that cause the hydrogel to exist in a shrunken state. When irradiated with UV light, the cis-trans isomerization of azobenzene causes the DNA strands to denature allowing the hydrogel to expand. Using control experiments, the authors demonstrate that the volume changes are indeed tied to the photo-induced isomerization (though azobenzene was shown to slowly relax to its trans state in the dark due to thermal factors). They also demonstrate the reversibility of ...
Barriers to translocation of organic ions in phospholipid membranes. Static and kinetic investigations of the structural ordering of phospholipid membranes doped with azobenzene derivative
A synthesis of a library of potential antibiotic azo dyes is described starting ultimately from aniline and directly from sulfanilamide. The procedure is analogous to that for the preparation of the historically important antibiotic azo dye, Prontosil ...
Gene toxicity in vitro: Prediction model based estimation and data from read across are used to determine the mutagenic nature of the test compoundAluminum, tris(5-amino-4-hydroxy-3-(2-phenyldiazenyl)-2,7-naphthalenedisulfonato(2-))di-(CAS no 68475-50-3). The summary is as mentioned below: Gene mutation toxicity (Ames assay) was predicted for the test compound Aluminum, tris(5-amino-4-hydroxy-3-(2-phenyldiazenyl)- 2,7-naphthalenedisulfonato(2-))di (CAS no 68475 -50 -3) using SSS QSAR prediction database, 2016. The study assumed the use of Salmonell typhimurium strain TA100 in the presence of S9 metabolic cativation system. The test compound Aluminum, tris(5-amino-4-hydroxy-3 -(2-phenyldiazenyl)-2,7-naphthalenedisulfonato(2-))di failed to induce mutation in the Salmonella typhimurium strain TA100 in the presence of S9 metabolic cativation system and hence is not likely to classify as a gene mutant in vitro. Gene mutation toxicity (Ames assay) was predicted for the test compound Aluminum, ...
III. Mixed neutral red and Janus green. To make the solution which is actually used on the slides, take 3 cc. of the dilute neutral red and to it add 2 drops of the saturated Janus green solution. Have the slides thoroughly clean and free from grease, by the usual methods. Flood the slide with the stain and drain the excess immediately back into the bottle. Then let the slide dry in warm air. This is conveniently arranged by working very close to a lighted Bunsen burner. There should be no streaks whatever of the stain on the slide. The excess can be removed from the edges by placing the edges against a piece of cheesecloth. After the slides are once made, they keep almost indefinitely. In making the fresh preparations of blood, it is important to seal the edges of the coverslips with a vaseline of high melting point. We study our preparations in a warm-box regulated to 37 C. and if one is interested in motility of cells, it is necessary to have the right temperature. The supravital differential ...
TY - CONF. T1 - Azoreductase from the alkalithermophilic Bacillus sp. strain SF. AU - Deller, Sigrid. AU - Trenker-El-Toukhy, Rosemarie. AU - Macheroux, Peter. PY - 2004. Y1 - 2004. M3 - Poster. ER - ...
Feedback control of photoresponsive fluid interfaces by Josua Grawitter and Holger Stark Photoresponsive surfactants provide a unique microfluidic driving mechanism. Since they switch between two molecular shapes under illumination and thereby affect surface tension of fluid interfaces, Marangoni flow along the interface occurs. To describe the dynamics of the surfactant mixture at a planar interface, we formulate diffusion-advection-reaction equations for both surfactant densities. They also include adsorption from and desorption into the neighboring fluids and photoisomerization by light. We then study how the interface responds when illuminated by spots of light. Switching on a single light spot, the density of the switched surfactant spreads in time and assumes an exponentially decaying profile in steady state. Simultaneously, the induced radial Marangoni flow reverses its flow direction from inward to outward. We use this feature to set up specific feedback rules, which couple the advection ...
Photoresponsive molecules have a broad range of potential applications, for example in optical, energy, and biomedical technologies. Fluorophores and second order nonlinear optical (NLO) chromophores are photoresponsive molecules used as signaling materials and frequency doublers or electro-optical modulators, respectively. The research presented here describes the synthesis, characterization, and potential applications of a group of highly fluorescent molecules and NLO chromophores containing benzene, imidazole and thiophene rings. Methyl, methoxy, and dimethylamino groups were used as electron donor groups while formyl and nitro groups were used as electron acceptors. The fluorescence properties of a series of dyes containing donor groups and a formyl group attached to a thiophenyl ring were investigated. X-ray structural determination revealed a steric crowding, which causes a molecular twist in the ground state. The fluorescence quantum yield for these fluorophores was found in the range of0.004-1.0
Thai V. Truong,1,3 Chao-Yuan Chen,1,4 Nelson V. Tabiryan,2 and Y. Ron Shen1,* 1Department of Physics, University of California, Berkeley, California 94720, USA 2BEAM Engineering for Advanced Measurement Co., Winter Park, Florida 32789, USA 3Current address: Biological Imaging Center, Beckman Institute, California Institute of Technology, Pasadena, California 91125, USA 4Current address: AU Optronics Corporation, Hsienchu 30078, Taiwan, China *Corresponding author: [email protected] ...
Go To: Top, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), References, Notes. Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved. Data compiled by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein. Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below. ...
We,Hebei Smart Chemicals (Group) Co. Ltd. ,provide our product catalog : China azodicarbonamide, guanidine carbonate, China 2-Methyl-2-butanol, bis[tetrakis(hydroxymethyl)phosphonium]sulfate solution, China tris(1-chloro-2-propyl)phosphate,
Large two-beam couplings in hemicyanine dye blended polymers. Mun, Junho; Yoon, Choon Supresearcher; Lee, Jong-Woo; Park, Jung-Ki; Lee, Kwang-Sup, International Conference on Photo-Responsive Organics and Polymers 2001, pp.381 - 382, ...
The Phototherapy Clinic at the Royal Jubilee Hospital is here to help patients take control of their psoriasis and other photo-responsive skin conditions in an environment that is safe and non-judgmental.
A couple of months ago we ran an updated version of an archive article on obtaining prescription drugs whose excipients (non-active ingredients such as fillers, capsules and colourings) were free of lactose, starch, corn, azo dyes, sugars etc - a major problem for those with severe allergies or intolerances to any of these ingredients. (This is not only a problem with prescription drugs but with nutritional supplements - see Micki Roses article on trying to get corn/grain-free supplements, for example.). The re-visit to the subject was triggered by Jackie Broadways struggle to get pain killing drugs (after a hip replacement) that were both corn and sugar free as she is acutely allergic to both. In theory there is a system through which you can access such medicines, via companies who can make up the drugs specially for you in a format that you can tolerate. The problem is that this is, understandably, an expensive process so Primary Care Trusts, and now, once again, GPs are reluctant to fund ...
The Cover picture shows an implementation of molecular solar thermal energy storage (MOST) technology on a large scale. It illustrates how the yellow-colored dihydroazulene (DHA) is converted into red-colored vinylheptafulvene (VHF) upon irradiation. The robust nature of this system was demonstrated through multiple energy storage-and-release cycles. As a potential candidate for the MOST concept, the photoswitch was evaluated both under simulated sunlight conditions as well as under natural outdoor conditions, demonstrating a possible avenue for future lab-to-site transfer. More details can be found in the Full Paper by Wang et al. (DOI: 10.1002/cssc.201700679).. [Cover Picture ...
what is the measurement of Oil red O staining - posted in Tissue and Cell Culture: Hi, Im doing oil red O staining of macrophages,but what is the measurement of ORO staining? The number of cells stained by ORO? The fluorescense intensity of ORO? Or comparing the red area in cells? Thanks!
Antibodies: A Laboratory Manual, has been revised, extended, and updated by Edward Greenfield of the Dana-Farber Cancer Center, with contributions from other leaders in the field. This second edition of the manual is an essential resource for molecular biology, immunology, and cell culture labs on all matters relating to antibodies.
Biosystems Arsenazo Calcium Reagent Calcium/magnesium standard. Calcium of 10 mg/dl (2.5 mmol/l), magnesium of 2 mg/dl. Primary water standard.
Intramuscular triacylglycerols measured by Oil Red O staining combined with an immunofluorescence staining against slow myosin heavy chain (sMHC), to determine
105945-47-9 - ZAMIPRRWRQNNJF-VHEBQXMUSA-N - Benzoic acid, 3-(6-amino-2-hydroxy-3-pyridylazo)-2,4,6-triiodo- - Similar structures search, synonyms, formulas, resource links, and other chemical information.
The term 'azobenzene' or simply 'azo' is often used to refer to a wide class of similar compounds. These azo compounds are ... the "Gold Book") (1997). Online corrected version: (2009) "azo compounds". doi:10.1351/goldbook.A00560 Harada, J.; Ogawa, K.; ... It is the simplest example of an aryl azo compound. ... "Protonation of azo-compounds. Part II: The structure of the ... The compounds similar to the unsubstituted azobenzene exhibit a low-intensity n-π* absorption in the visible region, and a much ...
... which can undergo coupling reaction to form an azo compound. As azo-compounds are highly coloured, they are widely used in ... Aryldiazonium couple with electron-rich aromatic compounds such as a phenol to form azo compounds. Such reactions are widely ... Reduction of nitro compounds Nitro compounds Can be accomplished with elemental zinc, tin or iron with an acid. ... ˈæmiːn/,[1][2] UK also /ˈeɪmiːn/)[3] are compounds and functional groups that contain a basic nitrogen atom with a lone pair. ...
Ueber das Hydrazin" [Diazo- and azo- compounds of alkanes. Fourth treatise. On hydrazine.]. In Erdmann OL (ed.). Journal für ... Hydrazine compounds can be effective as active ingredients in admixture with or in combination with other agricultural ... Hydrazine is an inorganic compound with the chemical formula N 2H 4. It is a simple pnictogen hydride, and is a colourless ... Specific compounds include azodicarbonamide and azobisisobutyronitrile, which produce 100-200 mL of gas per gram of precursor. ...
... the azo compound (5) could be crystallized with 65% yield. The last step is a photolysis of the azo compound. This photolysis ... Albert Ladenburg proposed this structure for the compound now known as benzene. The compound was not synthesized until 1973. In ... The compound is explosive, which is unusual for a hydrocarbon. Due to this ring strain, the bonds have a low bond energy and ... atoms of the prismane molecule are arranged in the shape of a six-atom triangular prism-this compound is the parent and ...
Azo compound Blueprint Ozalid Contact copier League of Nations (1937). Economic Committee: Sub-committee of Experts for the ... Using the right compound some "cyano copiers" could be adapted to be used as "diazo copiers". The light sensitivity of certain ... In this procedure a distinctly blue compound is formed and the process is also known as cyanotype. The paper is impregnated ... Different blueprint processes based on photosensitive ferric compounds have been used. The best known is probably a process ...
"Synthesis of azobenzenes: the coloured pieces of molecular materials" (PDF). Benzenediazonium chloride Azo compound Solvent ... The optimal pH value for this azo coupling is 8.5-10. The reaction is carried out in water, since sodium chloride (or potassium ... Solvent Yellow 7 is a common azo dye with a formula of C6H5N2C6H4OH. Like most azobenzenes, Solvent Yellow 7 can be synthesized ...
Azo compounds perform Cis-trans isomerism upon receiving UV-Vis light. The most complex macromolecular machines are found ... doi:10.1016/0014-3057(91)90123-6. Kazem-Rostami, Masoud (2017). "Design and synthesis of Ʌ-shaped photoswitchable compounds ...
... is an organic compound and an azo compound. It is a commercial orange pigment. It is also classified as a ...
The chiral auxiliaries on these compounds are easily removed after hydrazine formation (with azo compounds) or azidation (with ... Azo compounds afford hydrazines after addition to the N=N bond. These additions have been rendered enantioselective through the ... Tosylamines: tributyltin hydride Azo compounds: H2/Pd Triazenes: sodium borohydride Azides: H2/Pd, H2/Pt, lithium aluminum ... Addition reactions have employed imines, oximes, azides, azo compounds, and others. A nitrogen bound to both a good electrofuge ...
... and azo compounds. Photoinitiation can also occur by bi-molecular H abstraction when the radical is in its lowest triplet ... This method is used most often with organic peroxides or azo compounds. Photolysis Radiation cleaves a bond homolytically, ...
Azo compound Blueprint Heliographic copier Ozalid Blueprints replaced by whiteprints Pai, Damodar M.; Melnyk, Andrew R.; Weiss ... In a related sense, the process relies on two properties of diazonium compounds: they are deactivated by light, i.e. they ... degrade irreversibly to products that cannot form deeply colored dyes they (the diazonium compounds that were not degraded by ...
Azo compound Contact copier Ozalid Diazo copier Photolith dictionary definition v t e. ...
Safety hazards have resulted in rapid decline of DEAD usage and replacement with DIAD and other similar compounds. Diethyl azo ... the solubility in water is higher for the related azo compound dimethyl azodicarboxylate. DEAD is a strong electron acceptor ... The azo group in DEAD is a Michael acceptor. In the presence of a copper(II) catalyst, DEAD assists conversion of β-keto esters ... Its molecular structure consists of a central azo functional group, RN=NR, flanked by two ethyl ester groups. This orange-red ...
Azo compounds perform Cis-trans isomerism upon receiving UV-Vis light.[22] ... Kazem-Rostami, Masoud (2017). "Design and synthesis of Ʌ-shaped photoswitchable compounds employing Tröger's base scaffold". ...
The azo and azide groups respectively, connected to organic/inorganic compounds (e.g. AgN3, Pb(N3)2, NH4N3) The halogenated ... Explosophores are functional groups in organic chemistry that give organic compounds explosive properties. The term was first ... This class contains for instance organic compounds of mercury, thallium, and lead. Other substances have been characterised as ...
The compound is obtained by azo coupling of aniline and acetoacetanilide or their derivatives. The class of compounds was ... Arylide yellow, also known as Hansa yellow and monoazo yellow, is a family of organic compounds used as pigments. They are ...
... is an organic compound that is classified as an azo dye. It is a dark blue water soluble solid. It is a popular ... It is produced by azo coupling of o-dianisidine with the appropriate naphthalene disulfonate. Klaus Hunger; Peter Mischke; ... Wolfgang Rieper; Roderich Raue; Klaus Kunde; Aloys Engel (2005). "Azo Dyes". Ullmann's Encyclopedia of Industrial Chemistry. ...
... (also Orange I) is an organic compound and an azo dye. It is one of the first water soluble dyes to be ...
Heating to 200 °C extrudes sulfur in this compound and forms the corresponding azo compound. Disulfur monoxide S=S=O is stable ... N-(Thiosulfinyl)amines of the type R-N=S=S are another group of stable compounds containing a S=S bond. The first such compound ... Many compounds containing a sulfur-sulfur double bond have been reported in the past although only a few verified classes of ... A thiosulfoxide is a chemical compound containing a sulfur to sulfur double bond of the type RR'S=S, with R and R' both alkyl ...
The Sudan dyes are a group of azo compounds which have been used to color hydrocarbon solvents, oils, fats, waxes, shoes, and ... results with 24 azo compounds. Mutation Research/Genetic Toxicology and Environmental Mutagenesis 2000, 465 (1), 11-26 Larsen, ... The EU azo Colorants Directive 2002/61/EC' has been replaced by the REACH regulation in 2009, when azo dyes where put on the ... A certificate for azo dyes exists to ensure that dyes that cleave to one of the forbidden amines are not being used for dyeing ...
The First Naturally Endogenous Azo Compound and Toxic Phenolic Metabolites". Zeitschrift für Naturforschung C. 39 (11-12): 1027 ... Bioactive compounds in foods. Gilbert, John., Senyuva, Hamide Z., Wiley InterScience (Online service). Oxford: Blackwell Pub. ... the odour compound from Agaricus praeclaresquamosus". Biochemical Systematics and Ecology. 26 (7): 793-794. doi:10.1016/S0305- ...
Furthermore, they can be react with many amines, nitrides, azo/diazo compounds, alkali metals and epoxides. Xylylene dichloride ... This compound can be classified in the group of benzyl halides and has a molecular weight of 175.052 g/mol. This compound has a ... With every hydrogen atom that is replaced with a halogen atom, the compound becomes less reactive. This is due to the fact that ... The chemical compound xylylene dichloride (C8H8Cl2) is a white to light yellow sandlike solid. ...
"Respiration and growth of Shewanella decolorationis S12 with an azo compound as the sole electron acceptor." Applied and ...
Azo compounds (R-N=N-R') can be the precursor of two carbon-centered radicals (R• and R'•) and nitrogen gas upon heating and/or ... Some radical initiators such as azo compounds and peroxides can detonate at elevated temperatures so they must be stored cold. ... Typical examples are molecules with a nitrogen-halogen bond, azo compounds, and organic and inorganic peroxides. Halogens ... "Peroxo Compounds, Inorganic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a19_177 ...
The nucleophilic addition of the enolate anion 2 to the diazonium salt produces the azo compound 3. Intermediate 3 has been ... indoles and related compounds. Part I. A new synthesis of 3,4-dihydrobenz[cd]indol-5(1H)-one (Uhle's ketone)". J. Chem. Soc. ...
... was the result of five years of testing involving thousands of compounds related to azo dyes. The crucial test result ... The synthesis of the compound had been first reported by Paul Gelmo, a chemistry student working at the University of Vienna in ... compound. However Dr. Bovet, who has received a Nobel Prize for medicine, and one of the authors of the French discovery, wrote ... This compound was first synthesized by Bayer chemists Josef Klarer and Fritz Mietzsch as part of a research program designed to ...
3′-Aminoacetanilide has been used in the preparation of azo compounds, pyrrole, imidazole, thiazole and other heterocycles. It ... 3'-Aminoacetanilide is a chemical compound which is a amino derivative of acetanilide and meta-isomer of aminoacetanilide. ...
The mono-amino derivatives or eurhodines are obtained when the arylmonamines are condensed with orthoamino azo compounds; by ... azo compounds with dilute acids. If alkyl or aryl-ortho-diamines be used, azonium bases are obtained. The azines are mostly ... Phenazine is an organic compound with the formula (C6H4)2N2. It is a dibenzo annulated pyrazine, and the parent substance of ... The only known biological sources of phenazine compounds are bacterial in nature. Some of the genera known to produce ...
Lightbox Azo compound Blueprint Ozalid Heliographic copier Thermal copier Verifax copier Diatype (machine) Cryder, George R. ( ...
Amides are also chemical compounds. They are made by reacting carboxylic acids like acetic acid with amines. There are many ...
... which can undergo coupling reaction to form an azo compound. As azo-compounds are highly coloured, they are widely used in ... Aryldiazonium couple with electron-rich aromatic compounds such as a phenol to form azo compounds. Such reactions are widely ... Reduction of nitro compounds Nitro compounds Can be accomplished with elemental zinc, tin or iron with an acid. ... ˈæmiːn/,[1][2] UK also /ˈeɪmiːn/)[3] are compounds and functional groups that contain a basic nitrogen atom with a lone pair. ...
... after being mixed with free radical generators such as azo-initiator compounds. Azo-initiators are considered to produce the ... Other than for dietary antioxidant vitamins-vitamin A, vitamin C and vitamin E-no food compounds have been proved with ... In the following discussion, the term "antioxidant" refers mainly to non-nutrient compounds in foods, such as polyphenols, ... and one thing that is clear is that the body sees them as foreign compounds and is trying to get rid of them." Values are ...
Azo compound. *Benzene derivative. *Carbene. *Carbonyl. *Carboxylic acid. *Cyanate. *Disulfide. *Dioxirane. *Enol ...
Azo-type pigments used in tattoos tend to cleave through enzymatic catalysis of redox reactions, resulting in highly ... Hannuksela M (2005). "Tattoo pigments contains toxic compounds, but legislators do not pay attention". Duodecim. 121 (17): 1802 ... Steinbrecher I, Hemmer W, Jarisch R (2004). "Adverse reaction to the azo dye Pigment Red 170 in a tattoo". J Dtsch Dermatol Ges ... Because the mercury and Azo-chemicals in red dyes are more commonly allergenic than other pigments, allergic reactions are most ...
These compounds do not react in reducing sugar assays but their hydrolysis products do. This makes borohydride reduced cello- ... Soluble chromogenic substrates: A cellulase sample is incubated with a water-soluble substrate such as azo-CM-cellulose, the ... by the addition of a basic solution that stops the enzymatic reaction and deprotonates the liberated phenolic compound to ...
Inhibitors of ethylene perception include compounds that have a similar shape to ethylene, but do not elicit the ethylene ... One of the first organometallic compounds, Zeise's salt is a complex of ethylene. Useful reagents containing ethylene include ... exceeds that of any other organic compound.[7][8] Much of this production goes toward polyethylene, a widely used plastic ... is highest when the plant is fertilized and no longer requires the production or maintenance of structures and compounds that ...
... was a forerunner for the development of hundreds of synthetic dyes and pigments like azo and diazo compounds which are the ... Transition metal compounds. From left to right, aqueous solutions of: Co(NO. 3). 2 (red); K. 2Cr. 2O. 7 (orange); K. 2CrO. 4 ( ... Vermilion, a toxic mercury compound favored for its deep red-orange color by old master painters such as Titian, has been ... Organic pigments such as diazo or phthalocyanine compounds feature conjugated systems of double bonds. Some inorganic pigments ...
The compound has been detected in deep space.[5]. Etymology[edit]. The name is a reference to Buckminster Fuller, as C60 ... The AZo Journal of Materials Online. AZoM™.com. "Buckminsterfullerene." 2006. Retrieved Jan 4. 2011. ... For example, diphenyldiazomethane reacts readily with C60 to give the compound C61Ph2.[37] Phenyl-C61-butyric acid methyl ester ... The compound is stable,[24] withstanding high temperatures and high pressures. The exposed surface of the structure can ...
The name refers to examination of protons as they occur in protium (hydrogen-1 atoms) in compounds, and does not imply that ... AZo Nano. July 9, 2010 *^ "The Proton Just Got Smaller". Photonics.Com. 12 July 2010. Retrieved 2010-07-19.. ... The result is a protonated atom, which is a chemical compound of hydrogen. In vacuum, when free electrons are present, a ...
... , also known as lye and caustic soda,[1][2] is an inorganic compound with the formula NaOH. It is a white solid ... Stapleton, H. E. and Azo, R. F. (1905) "Alchemical equipment in the eleventh century, A.D.," Memoirs of the Asiatic Society of ... "Sodium Hydroxide - Compound Summary". Retrieved June 12, 2012.. *^ "1310-73-2,Sodium hydroxide solution,Sigma Aldrich,sodium ... Dissolving amphoteric metals and compounds[edit]. Strong bases attack aluminium. Sodium hydroxide reacts with aluminium and ...
... volatile ether compounds, which one can view as coupled compounds of alcohol and acid-water, or, according to the theory of ... In chemistry, an ester is a chemical compound derived from an acid (organic or inorganic) in which at least one -OH (hydroxyl) ... Sources of carbon nucleophiles, e.g., Grignard reagents and organolithium compounds, add readily to the carbonyl. ... organolithium compounds, etc.). The C-H bonds adjacent to the carbonyl are weakly acidic but undergo deprotonation with strong ...
Because chromium compounds were used in dyes, paints, and leather tanning compounds, these compounds are often found in soil ... "Azo Materials. AZoNetwork. Retrieved 1 October 2018.. *^ Edwards, J (1997). Coating and Surface Treatment Systems for Metals. ... Uses of compoundsEdit. *Chromium(IV) oxide (CrO2) is a magnetic compound. Its ideal shape anisotropy, which imparts high ... Compounds of chromium(V) are rather rare; the oxidation state +5 is only realized in few compounds but are intermediates in ...
GALLAMINE, ITS SALTS, ITS QUATERNARY COMPOUND 220. GANCYCLOVIR 221. GANIRELIX 222. GATIFLOXACIN ... SALICYL-AZO-SULPHAPYRIDINE 445. SALMON CALCITONIN 446. SAQUINAVIR 447. SATRANIDAZOLE 448. SECNIDAZOLE ...
In chemistry, alcohol is a general term which refers to many organic compounds used in industry and science as reagents, ...
When a higher priority group is present in the compound, the prefix hydroxy- is used in its IUPAC name. The suffix -ol in non- ... In chemistry, alcohol is an organic compound that carries at least one hydroxyl functional group (−OH) bound to a saturated ... "How to name organic compounds using the IUPAC rules". www.chem.uiuc.edu. THE DEPARTMENT OF CHEMISTRY AT THE UNIVERSITY OF ... Those groups can form hydrogen bonds to one another and to most other compounds. Owing to the presence of the polar OH alcohols ...
... built via aniline dyes and extended via the related azo dyes. The first azo dye was aniline yellow.[25] ... Aniline is an organic compound with the formula C6H5NH2. Consisting of a phenyl group attached to an amino group, aniline is ... Auerbach G, "Azo and naphthol dyes", Textile Colorist, 1880 May;2(17):137-9, p 138. ... The chemistry of aniline is rich because the compound has been cheaply available for many years. Below are some classes of its ...
Related compounds[edit]. Many classes of compounds with C-O-C linkages are not considered ethers: Esters (R-C(=O)-O-R′), ... Ethers are a class of organic compounds that contain an ether group-an oxygen atom connected to two alkyl or aryl groups. They ... Ethers are quite stable chemical compounds which do not react with bases, active metals, dilute acids, oxidising agents, and ... Polyethers are compounds with more than one ether group. The crown ethers are examples of small polyethers. Some toxins ...
Alkyl azo compounds[edit]. Aliphatic azo compounds (R and/or R′ = aliphatic) are less commonly encountered than the aryl azo ... Aryl azo compounds[edit]. Aryl azo compounds are usually stable, crystalline species. Azobenzene is the prototypical aromatic ... the "Gold Book") (1997). Online corrected version: (2009) "azo compounds".. *^ a b European Ban on Certain Azo Dyes Archived ... Azo compounds are compounds bearing the functional group R−N=N−R′, in which R and R′ can be either aryl or alkyl. IUPAC defines ...
Azo compound Azo. (Diimide) RN2R' azo-. -diazene Methyl orange. (p-dimethylamino-azobenzenesulfonic acid) ... Nitroso compound Nitroso. RNO nitroso- (Nitrosyl-). Nitrosobenzene Oxime Oxime. RCH=NOH Oxime Acetone oxime. (2-Propanone oxime ... Compounds that contain C-O bonds each possess differing reactivity based upon the location and hybridization of the C-O bond, ... Compounds that contain nitrogen in this category may contain C-O bonds, such as in the case of amides. ...
... is an azo dye that is used as a dye-stuff. It is a direct dye for cotton textiles.[3] In biosciences, it is used as ... Since cells are very selective in the compounds that pass through the membrane, in a viable cell trypan blue is not absorbed; ... https://pubchem.ncbi.nlm.nih.gov/compound/9562061#section=Color *^ https://pubchem.ncbi.nlm.nih.gov/compound/9562061#section= ... Klaus Hunger; Peter Mischke; Wolfgang Rieper; Roderich Raue; Klaus Kunde; Aloys Engel (2005). "Azo Dyes". Ullmann's ...
Organosulfur compounds. References[edit]. *^ H. W. Kroto; B. M. Landsberg; R. J. Suffolk; A. Vodden (1974). "The photoelectron ...
"AZO Materials. 22 January 2016. Retrieved 23 January 2016.. *^ Antonovsky, A. (1984). "The application of colour to SEM imaging ... Compound eye of Antarctic krill Euphausia superba. Arthropod eyes are a common subject in SEM micrographs due to the depth of ... SEM image of a house fly compound eye surface at 450× magnification. ...
Hsu, C.A.; Wen, T.N.; Su, Y.C.; Jiang, Z.B.; Chen, C.W.; Shyur, L.F. Biological Degradation of Anthroquinone and Azo Dyes by a ... and hydroxide radicals that have increased oxidizing and reducing abilities to be used on numerous industrial dye compounds.[3] ... Jafari, N.; Kasra-Kermanshahi, R.; Soud, M.R.; Mahvi, A.H.; Gharavi, S. Degradation of a textile reactive azo dye by a combined ... Kinetic Study of an Immobilized Iron Oxide for Catalytic Degradation of Azo Dye Reactive Black B with Catalytic Decomposition ...
Herz reaction, Herz compounds. *Herzig-Meyer alkimide group determination. *Heumann indigo synthesis ... Azo coupling. B[edit]. *Baeyer-Drewson indigo synthesis. *Baeyer-Villiger oxidation. *Baeyer-Villiger rearrangement ...
A ketone is an organic compound that has a carbon atom with a double bond to an oxygen atom (this is called carbonyl functional ...
First, α-diazocarbonyl compounds are in an equilibrium of s-cis and s-trans-conformers, the distribution of which may influence ... Primary diazoalkanes undergo azo coupling to form azines; thus the reaction conditions must be altered such that acid chloride ... α-diazocarbonyl compounds are generally locally planar, with large rotational barriers (55-65 kJ/mol) due to C-C olefin ... Generally, under photolysis, compounds in the s-cis conformation react in a concerted manner due to the antiperiplanar ...
"Estimation of Aqueous Solubility of Chemical Compounds Using E-State Indices". Chem Inf. Comput. Sci. 41: 1488-1493. PMID ... Azo jedinjenja. Sakrivene kategorije: *Wikiprojekat farmakološki članci. *Lekovi bez ATC koda. *Stranice sa čarobnim vezama za ...
Jones, Tony; Egerton, Terry A. (2000). "Titanium Compounds, Inorganic". Kirk-Othmer Encyclopedia of Chemical Technology. John ... Konstantinou, Ioannis K; Albanis, Triantafyllos A (2004). "TiO2-assisted photocatalytic degradation of azo dyes in aqueous ... Note: Wavelength (λ) = 387 nm[63] This reaction has been found to mineralize and decompose undesirable compounds in the ... can substantially reduce concentrations of airborne pollutants such as volatile organic compounds and nitrogen oxides.[56] A ...
This article about a heterocyclic compound is a stub. You can help Wikipedia by expanding it. *v ... Sudan Yellow a3G, also known as Solvent Yellow 16, C.I. disperse yellow and C.I. 12700, is a yellow azo dye. Chemically it is 4 ...
Azo dyes that release carcinogenic amine compounds are prohibited. - Discharge printing methods using aromatic solvents and ...
All of aden + anais fabrics are created free of azo chemical compounds. All of aden + anais packaging is recyclable and ... All of aden + anais fabrics are created free of azo chemical compounds. All of aden + anais packaging is recyclable and ...
Azo dyes that release carcinogenic amine compounds are prohibited. *Discharge printing methods using aromatic solvents and ... All of our bleaches must be based on oxygen (no chlorine bleaching) and we NEVER use Azo dyes, which are carcinogenic ...
Azo-dye reductase. FMN-dependent NADH-azo compound oxidoreductase. FMN-dependent NADH-azoreductase. ...
Azo-konposatu batzuk azido-base bolumetrietan baliatzen dira adierazle moduan, metllo-laranja esaterako[3]. ...
Other initiators suitable for use include ammonium persulfate, potassium persulfate, peroxides, azo compounds, and known redox ... Dip glove former into latex compound. (Latex compound should be well mixed and should sit for one (1) day prior to dipping.) ... Example 5 Compounding and Coagulant Dipping Procedures to Make Antistatic Gloves The blended latexes of Example 4 were ... The blend of step (1) and step (2) latexes then was compounded and used to make gloves according to the method of Example 5. ...
Originally the object of this research was to prepare a series of new azo compounds related to semicarbazones by lead ... Originally the object of this research was to prepare a series of new azo compounds related to semicarbazones by lead ...
Title: Preparation and reactions of azo compounds Type: Article  Author: Vrba, Zdeněk Date: 1995 ... Title: 13C and 119Sn NMR spectra of some monophenyltin(IV) compounds Type: Article  Author: Pejchal, Vladimír; Holeček, ...
Free of AZO dye compound (amines-free). Free of tin-organic. Free of nonylphenol. ...
Free of AZO dye compound (amines-free). Free of tin-organic. Free of nonylphenol. ...
Free of AZO dye compound (amines-free). Free of tin-organic. Free of nonylphenol. ...
Free of AZO dye compound (amines-free). Free of tin-organic. Free of nonylphenol. ...
Free of AZO dye compound (amines-free). Free of tin-organic. Free of nonylphenol. ...
Free of AZO dye compound (amines-free). Free of tin-organic. Free of nonylphenol. ...
Free of AZO dye compound (amines-free). Free of tin-organic. Free of nonylphenol. ... If polyhydroxy compounds are used, polyhydroxy compounds are not only components of polyurethane molecular chain, but also have ... It can also effectively remove some strong volatile compounds that will produce odor.3. More pure resin is usedIn many plastics ... Organometallic compounds containing tin and silver are sometimes used as antimicrobial agents.6. Using desorption methodAnother ...
... compounds are represented by their chemical formula followed by adequate instructions on the preparation of individual azo- and ... b) a compound capable of solvating the ionophore, and. (c) a hydrophobic binder, characterized in that said ionophore is a ... It was not credible that all the compounds covered by Claim 1 having any kind of substituents could be used for the intended ... Apparently the real problem was that the Examining Division found it not credible that all compounds covered by Claim 1 were ...
... or a polymer compound separately having a repeating unit including a crosslinkable group in a side chain and a repeating unit ... A coloring composition according to the invention contains: a polymer compound having a repeating unit including a ... including a mesogenic group in a side chain; and a dichroic dye compound. ... Azo compounds, photocrosslinkable polyimides, polyamides, and esters are more preferable.. To a photo-alignment film formed ...
Azo compounds account for over fifty percent of contemporary dyes.. Purity of a chemical agent can likewise be expressed ... These compounds are called simple salts. Iodine is a mineral that you must be healthy. Mined minerals are more cost-effective ... Lets explore how to create the compound named Salt.. Type of Salt Chemistry. A related process dependent on the decrease in ... If youre flabbergasted by the word ionic compound and dont have any clue about it at all, in that instance, you better have a ...
Material: 100% cotton, washable and free of toxic Azo compound dyes.. Pole width: 120 cm. Cloth size: 190 x 125 cm. Hanging ... All hammocks are of 100% cotton, washable and free of toxic Azo compound dyes. Please note: Our hammocks are all supplied ... All hanging chairs are of 100% cotton, washable and free of toxic Azo compound dyes unless otherwise stated. Please note: Our ...
... azo-kappaN1)-4,5-dihydro-3-methyl-5-(oxo-kappaO)-1H-pyrazol-1-yl)benzenesulfonamidato(2-))-, sodium , C32H26Cl2CoN10NaO8S2- , ...
This compound group is populated by taking the more general compound group and subtracting the chemicals found in the relevent ... o-dianisidine based azo dyes 4,4-diarylazo-3,3-dimethoxybiphenyl dyes with the exception of those mentioned elsewhere in ... o-dianisidine based azo dyes 4,4-diarylazo-3,3-dimethoxybiphenyl dyes with the exception of those mentioned elsewhere in ... See the Compound Group Population Project for more information on how these groups are determined. ...
All hammocks are of 100% cotton, washable and free of toxic Azo compound dyes. Please note: Our hammocks are all supplied ... All hanging chairs are of 100% cotton, washable and free of toxic Azo compound dyes unless otherwise stated. Please note: Our ...
All hammocks are of 100% cotton, washable and free of toxic Azo compound dyes. Please note: Our hammocks are all supplied ... All hanging chairs are of 100% cotton, washable and free of toxic Azo compound dyes unless otherwise stated. Please note: Our ...
All hammocks are of 100% cotton, washable and free of toxic Azo compound dyes. Please note: Our hammocks are all supplied ... All hanging chairs are of 100% cotton, washable and free of toxic Azo compound dyes unless otherwise stated. Please note: Our ...
All hammocks are of 100% cotton, washable and free of toxic Azo compound dyes. Please note: Our hammocks are all supplied ... All hanging chairs are of 100% cotton, washable and free of toxic Azo compound dyes unless otherwise stated. Please note: Our ...
All hammocks are of 100% cotton, washable and free of toxic Azo compound dyes. Please note: Our hammocks are all supplied ... All hanging chairs are of 100% cotton, washable and free of toxic Azo compound dyes unless otherwise stated. Please note: Our ...
All hammocks are of 100% cotton, washable and free of toxic Azo compound dyes. Please note: Our hammocks are all supplied ... All hanging chairs are of 100% cotton, washable and free of toxic Azo compound dyes unless otherwise stated. Please note: Our ...
Tested by Intertek, guaranteed free from Chrome 6, Lead, Formaldehyde, Azo ... Tested by Intertek, guaranteed free from Chrome 6, Lead, Formaldehyde, Azo Dyes, Disperse Dyes, Organotin compounds. ...
Free of most environmentally damaging chemicals such as PVC, phthalate, heavy metals, azo compounds, nonylphenol and ...
It is used to remove pollutants in the environment, including various chlorinated organics, azo dyes, nitroaromatic compounds, ... It is also a raw material for making copper compounds.. What are the physical properties of copper oxide (CuO)?. Regarding the ... "Chemical treatment" is a film of a compound formed in the reaction of a matrix material with another material. This reaction ...
  • The enzyme can reduce ethyl red and methyl red, but is not able to convert sulfonated azo dyes. (uniprot.org)
  • Azo dyes are also prepared by the condensation of nitroaromatics with anilines followed by reduction of the resulting azoxy intermediate: ArNO2 + Ar′NH2 → ArN(O)=NAr′ + H2O ArN(O)=NAr′ + C6H12O6 → ArN=NAr′ + C6H10O6 + H2O For textile dying, a typical nitro coupling partner would be disodium 4,4′-dinitrostilbene-2,2′-disulfonate. (wikipedia.org)
  • Zhang, Zhimin 2013-12-24 00:00:00 This work deals with selective reduction of aromatic nitro compounds to corresponding symmetrical substituted azo compounds using nitrogen-doped TiO2 nanoparticles as photocatalyst in the presence of a catalytic amount of formic acid. (deepdyve.com)
  • Alterations of the intestinal microflora by diet, oral antibiotics, and Lactobacillus: decreased production of free amines from aromatic nitro compounds, azo dyes, and glucuronides. (semanticscholar.org)
  • Reduction of polymeric azo and nitro dyes by intestinal bacteria. (semanticscholar.org)
  • Since anilines are prepared from nitro compounds, some azo dyes are produced by partial reduction of aromatic nitro compounds. (wikipedia.org)
  • this consists of nitro compounds, which are removed by vigorously stirring the oil for about three hours with 20 cc. of concentrated hydrochloric acid , 300 cc. of water, and 200 g. of iron filings in a 2-l. flask connected with a reflux condenser. (orgsyn.org)
  • 3. Iodobenzene prepared by this procedure may contain traces of nitro compounds. (orgsyn.org)
  • If a phenolic odor is obtained on boiling the solution, nitro compounds are still present. (orgsyn.org)
  • an azo dye is formed if nitro compounds were originally present. (orgsyn.org)
  • IUPAC defines azo compounds as: "Derivatives of diazene (diimide), HN=NH, wherein both hydrogens are substituted by hydrocarbyl groups, e.g. (wikipedia.org)
  • 18-25 Although the electrochemical behavior of some Schiff base compounds derived from 4-amino-2-methyquinoline has been reported, 26 no studies concerning the electrochemical behavior of the latter one or its azo-derivatives are reported in the literature to date. (scielo.br)
  • In the present work, two azo-derivatives from 4-amino-2-methylquinoline were synthesized and characterized. (scielo.br)
  • In this study, UV calculations of some azo-ester derivatives substituted 4-acryloyloxy group in the gas phase and the solvent phases (ethanol, dimethylformamide and chloroform) for neutral form and gas phase for their protonated forms have been studied theoretically by using density functional theory. (rroij.com)
  • Since azo-acrylate derivatives can be used as dyes and pigments and copolimerised with different monomers, they are commonly used in the synthetic organic fields [ 13 , 14 ]. (rroij.com)
  • Molecular structures of some azo-ester derivatives containing 4-acryloyloxy group were firstly optimized by using B3LYP method and 6-311G(d,p) basis set in gas phase and ethanol, DMF and chloroform phase for neutral form and gas phase for protonated form. (rroij.com)
  • dichloro derivatives do give azo compounds, however. (bl.uk)
  • Since diazonium salts are often unstable near room temperature, the azo coupling reactions are typically conducted near ice temperatures. (wikipedia.org)
  • Aromatic azo compounds can be synthesized by azo coupling, which entails an electrophilic substitution reaction where an aryl diazonium cation is attacked by another aryl ring, especially those substituted with electron-donating groups: ArN+ 2 + Ar′H → ArN=NAr′ + H+ Since diazonium salts are often unstable near room temperature, the azo coupling reactions are typically conducted near 0 °C. The oxidation of hydrazines (R−NH−NH−R′) also gives azo compounds. (wikipedia.org)
  • Most are salts, the colored component being the anion usually, although some cationic azo dyes are known. (wikipedia.org)
  • The aim of this research is to synthesize polymers containing aromatic azo groups located ortho - to amino groups in the main polymer chain by diazotization reaction of p-(PPDA) and m-(MPDA) phenylenediamine and by subsequent azo coupling of obtained diazonium salts with MPDA and investigate chemical and electrical properties of obtained polymers. (hindawi.com)
  • Aliphatic azo compounds (R and/or R′ = aliphatic) are less commonly encountered than the aryl azo compounds. (wikipedia.org)
  • [6] Because of their instability, aliphatic azo compounds pose the risk of explosion . (wikipedia.org)
  • 1-12 The synthesis and spectral properties of several azo-dyes as well as of their transition metal complexes have been reported in the literature. (scielo.br)
  • According to the general procedure for synthesis of azo-compounds reported in the literature, 27 0.01 mol of the starting compound, 4-amino-2-methylquinoline ( 1 ) (Aldrich), was converted to 4-(diazonium salt)-2-methylquinoline by dissolving in a mixture consisting of 4 mL water and 8 mL of 9.8 mol L -1 HCl. (scielo.br)
  • Closer investigation showed that one of the more common motifs of the unknown molecules was 2-bromo-4,6-dinitroaniline (BNA), a raw material for the synthesis of brominated azo dyes. (acs.org)
  • Ferric hydrogen sulfate (FHS) catalyzed azo compound synthesis. (beilstein-journals.org)
  • The synthesis was carried out analogously to the mentioned-above procedure with reagent qualities −1.00 g (9.26 mmol) MPDA, 1.244 g (19.4 mmol) sodium nitrite, and for azo coupling 1.00 g (9.26 mmol) MPDA. (hindawi.com)
  • Dotz, Highly Regio-and Diastereoselective Chromium(0) -Catalysed Cyclopropanation of 1-Alkoxy-1,3-dienes with Diazo Compounds , Eur. (thefreedictionary.com)
  • His work revolves around the chemistry of oxadiazolines, which he has shown to be exceedingly versatile precursors of carbenes (upon thermolysis) or diazo compounds (upon photolysis). (thefreedictionary.com)
  • a series of reactions whereby diazo compounds are employed in substitution. (thefreedictionary.com)
  • This chemical reacts with azo and diazo compounds to generate toxic gases. (sciencephoto.com)
  • The azo groups are attached to the aromatic heterocycles, enolizable aliphatic groups and mainly benzene and naphthalene rings [ 2 ]. (rroij.com)
  • Benzene , or Benzol (see also Benzine ) is an organic chemical compound with the formula C 6 H 6 . (bionity.com)
  • Benzene is a natural constituent of crude oil, but it is usually synthesized from other compounds present in petroleum. (bionity.com)
  • For example, 1,4-diamino benzene is intermediate compound and a major component of azo dye, it releases when azo dyes degrade (Figure 1). (academicjournals.org)
  • Many azo pigments are non-toxic, although some, such as dinitroaniline orange, ortho-nitroaniline orange , or pigment orange 1, 2, and 5 have been found to be mutagenic . (wikipedia.org)
  • A novel screening method revealed high amounts of mutagenic azo dyes in house dust. (acs.org)
  • Many azo pigments are non-toxic, although some, such as dinitroaniline orange, ortho-nitroaniline orange, or pigment orange 1, 2, and 5 are mutagenic and carcinogenic. (wikipedia.org)
  • Some azo dyes have been banned as food additives due to toxic, mutagenic, and carcinogenic side effects. (academicjournals.org)
  • Some microorganisms are capable of utilizing azo dyes and degrade them, but intermediate compounds are toxic, mutagenic, and carcinogenic (Houk et al. (academicjournals.org)
  • Some of the azo dyes, with and without bromine, are known to be carcinogenic or mutagenic. (acs.org)
  • Archibald Scott Couper in 1858 and Joseph Loschmidt in 1861 suggested possible structures that contained multiple double bonds or multiple rings, but the study of aromatic compounds was in its very early years, and too little evidence was then available to help chemists decide on any particular structure. (bionity.com)
  • 2000). These dyes are aromatic compounds that are usually stable and highly water soluble. (academicjournals.org)
  • 2020). Reduction of azo group (N=N linkage) leads to production of aromatic compounds which are more toxic and known for causing mutations and carcinogenic diseases (Puvaneswari et al. (academicjournals.org)
  • Certain azo dyes can break down under reductive conditions to release any of a group of defined aromatic amines . (wikipedia.org)
  • Consumer goods which contain listed aromatic amines originating from azo dyes were prohibited from manufacture and sale in European Union countries in September 2003. (wikipedia.org)
  • Catalyzes the reductive cleavage of azo bond in aromatic azo compounds to the corresponding amines. (uniprot.org)
  • Compounds with a nitrogen atom attached to a carbonyl group, thus having the structure R-CO-NR′R″, are called amides and have different chemical properties from amines. (wikipedia.org)
  • It is useful in chemistry in converting amines into diazonium compounds , which are used in making azo dyes. (britannica.com)
  • Azobenzene is the prototypical aromatic azo compound. (wikipedia.org)
  • Azo compounds are compounds bearing the functional group R−N=N−R′, in which R and R′ can be either aryl or alkyl . (wikipedia.org)
  • Aryl azo compounds are usually stable, crystalline species. (wikipedia.org)
  • As a consequence of п- delocalization , aryl azo compounds have vivid colors, especially reds, oranges, and yellows. (wikipedia.org)
  • Azo dyes are organic compounds bearing the functional group R−N=N−R′, in which R and R′ are usually aryl. (wikipedia.org)
  • Most azo dyes are prepared by azo coupling, which entails an electrophilic substitution reaction of an aryl diazonium cation with another compound, the coupling partner. (wikipedia.org)
  • Many textile and leather articles are dyed with azo dyes and pigments . (wikipedia.org)
  • [8] Likewise, several case studies have linked azo pigments with basal cell carcinoma . (wikipedia.org)
  • The present invention provides a compound and a pigment dispersant, each of which improves the dispersibility of various types of pigments in a non-aqueous solvent and also provides a pigment composition, a pigment dispersion, and a toner, each of which has a preferable coloring power. (patents.com)
  • Chemically related to azo dyes are azo pigments, which are insoluble in water and other solvents. (wikipedia.org)
  • Illustrative azo dyes or their precursors Direct Brown 78 Direct Blue 1 Basic Red 18, a cationic azo dye Azo pigments are similar in chemical structure to azo dyes, but they lack solubilizing groups. (wikipedia.org)
  • Azo pigments are important in a variety of plastics, rubbers, and paints (including artist's paints). (wikipedia.org)
  • For example, there is a class of chemicals called 'azo compounds' that are all characterized as having a double nitrogen bond in them, and these azo compounds are most commonly found in dyes and pigments because the double nitrogen bond absorbs light of various frequencies giving those azo compounds colour. (houserepairtalk.com)
  • The oxidation of hydrazines (R−NH−NH−R′) also gives azo compounds. (wikipedia.org)
  • In addition, promising emerging technologies, such as advanced oxidation procedures, that are applicable to the destruction of hazardous compounds in the laboratory are discussed. (researchandmarkets.com)
  • Oxidation of poly(azo-p-phenyleneazo-2,4-diamino-1,5-phenylene) was carried out and new polymer with benzotriazolic units in the main polymer chain was obtained. (hindawi.com)
  • Mild and efficient oxidation of alcohols into carbonyl compounds with hydrogen peroxide catalyzed by iron(III) tetrakis( p -sulfonato- phenylporphyrinato) acetate, supported on polyvinylpyridine and Amberlite IRA-400, at room temperature is reported. (niscair.res.in)
  • Azo dyes are toxic to living organisms and their genotoxic and carcinogenic potentials are intensified on being released as mixtures. (igi-global.com)
  • A commercially important alkyl azo compound is azobisisobutyronitrile (AIBN), which is widely used as an initiator in free-radical polymerizations and other radical-induced reactions. (wikipedia.org)
  • carbonyl azo compounds. (bl.uk)
  • Thiocyano and the carbonyl carbon of a -COO- group are attached to the same carbon or to a chain consisting of carbons, which chain may include ring members (e.g., terpene thiocyanoacyl compounds, etc. (uspto.gov)
  • Many volatile organic compounds (VOCs) are emitted during the manufacturing of thin film transistor liquid crystal displays (TFT-LCDs), exposures to some of which have been reported to be associated with kidney dysfunction, but whether such an effect exists in TFT-LCD industry workers is unknown. (ilo.org)
  • and wherein the polymer composition comprises from 0.01 to less than 2 weight % volatile organic compounds, based on the weight of said polymer composition, and the polymer composition has degree of cracking of at least 6 and a hardness value of at least 65 seconds. (google.es)
  • The use of volatile coalescents including volatile solvents, is coming under increased scrutiny as they are a source of volatile organic compounds (VOC's) which can contribute to atmospheric pollution. (google.es)
  • Health Canada monitoring activities focused on human exposure to contaminants, including measurement of chemicals in household dust, volatile organic compounds in drinking water, a selection of chemicals in indoor air, hexachloro-norborne-based flame retardants in human milk and serum, and phthalates and BPA exposure in pregnant women. (gc.ca)
  • Azo coupling IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). (wikipedia.org)
  • Based on these structural insights, several inhibitors with improved potency were subsequently identified in the National Cancer Institute Compound Library and the Available Chemical Directory by similarity search and molecular modeling methods. (nih.gov)
  • Azo coupling Ponceau 4R Ponceau S Glycoazodyes IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). (wikipedia.org)
  • i) Chemical structure, properties and safety of different azo dyes that are used as a food additive such as Tartrazine E102, Sunset Yellow E110, Ponceau E124, Azorubine E122, Amaranth E123, and Allura Red E129 classified as the most dangerous additive dyes base on their side effects on human being. (academicjournals.org)
  • Based on ultra-high resolution mass spectrometry combined with statistical analysis, the method can pluck individual brominated compounds out of a mixture and provide a chemical formula for them. (acs.org)
  • Based this finding and the compounds' chemical formulas, Sun and her colleagues concluded that the unknown compounds were indeed these dyes. (acs.org)
  • Compound groups are groups of chemicals that share structural or chemical features. (pharosproject.net)
  • On the basis of carefully selected examples it offers simple and concise guidelines for the generation of systematic compound names as codified by the IUPAC rules. (booktopia.com.au)
  • The function of cytoplasmic flavin reductases in the reduction of azo dyes by bacteria. (semanticscholar.org)
  • Human intestinal microform, skin microflora, and environmental microorganisms can degrade azo dyes .Reduction of azo compounds can also occur by human liver azoreductase, or by non-biological factors (Chang, 2016). (academicjournals.org)
  • They are a commercially important family of azo compounds, i.e. compounds containing the linkage C-N=N-C. Azo dyes are widely used to treat textiles, leather articles, and some foods. (wikipedia.org)
  • 8. An electrophotographic element as set forth in claim 1 in which the charge generaton layer comprises a lenium and its alloys, tellurium and its alloys, disazo compounds, and methine dyes derived from squaric acid. (google.com.au)
  • Organic compounds are best though of as relatively unreactive hydrocarbon skeletons decorated by functional groups - groups of atoms that undergo characteristic reactions. (wikibooks.org)
  • Methyl group, one of the commonest structural units of organic compounds, consisting of three hydrogen atoms bonded to a carbon atom, which is linked to the remainder of the molecule. (britannica.com)
  • Studies have hinted there are also large concentrations of unknown and potentially harmful brominated compounds in dust, but the number of compounds remained unclear and scientists didn't have an efficient way to identify them, says Jianxian Sun, an environmental toxicologist at the University of Saskatchewan. (acs.org)
  • Since dust is one of the primary routes of exposure to brominated flame retardants, we wondered if there were other brominated compounds in dust that might be of concern," Sun says. (acs.org)
  • The electrons in most stable organic compounds are paired in atomic or molecular orbitals, so the total electron count is an even number. (msu.edu)
  • This compound group is defined by the SMILES string 'C(C(C(C(C(F)(F)S(=O)(=O)N)(F)F)(F)F)(F)F)(C(C(C(F)(F)F)(F)F)(F)F)(F)F'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system . (pharosproject.net)
  • For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system . (pharosproject.net)
  • This compound group is defined by the SMILES string 'C1=CC(=C(C=C1Cl)Cl)OCC(=O)O'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system . (pharosproject.net)
  • Molecular model of the organic compound and amide hexanamide (C6.H13.N.O), also known as capronamide. (sciencephoto.com)
  • Some azo compounds, e.g., methyl orange , are used as acid-base indicators due to the different colors of their acid and salt forms. (wikipedia.org)
  • In addition, the assessment of the antioxidant activity of the compounds (c1-3) by DPPH essay gave positive results comparing to ascorbic acid (VC) as a reference compound. (jbiochemtech.com)
  • However, these biocompatible and biodegradable aromatic polyanhydrides have aliphatic bonds resulting in compounds with slow degradation tunes as well as relatively insoluble degradation products unless incorporated into a copolymer containing a more hydrophilic monomer, such as sebacic acid. (google.es)
  • Nitrous acid , (HNO 2 ), an unstable, weakly acidic compound that has been prepared only in the form of cold, dilute solutions. (britannica.com)
  • 6-[(p-tosyl)amino]hexanoic acid, compound with. (europa.eu)
  • 8. The process as claimed in claim 1, wherein a glycidyl methacrylate copolymer with styrene, a substituted styrene or meethacrylic acid ester as the comonomer is employed as the compound which carries epoxide groups. (patentgenius.com)
  • Four new azo-azomethine ligands (b2, b3, c2 and c3) have been prepared from the reaction of 4, 4′ (diamino diphenyl) methane with 5-(4-X-phenyl)-azo-salicylaldehyde (X = H, CH3 and Br). (jbiochemtech.com)
  • The report contains an in-depth analysis of the European Union market for diazo-, azo- or azoxy-compounds, covering EU total and local markets. (marketpublishers.com)
  • European consumers of diazo-, azo- or azoxy-compounds are briefly overviewed as well. (marketpublishers.com)
  • Diazo-, Azo- or Azoxy-compounds market prospects to 2022 are given (incl. (marketpublishers.com)
  • Your company's business and sales activities will be boosted by gaining an insight into the diazo-, azo- or azoxy-compounds EU market. (marketpublishers.com)
  • HSE's Working Group on Action to Control Chemicals (WATCH) has recently reviewed the information available about the incorporation of the azo compound CI Solvent Red 164 within liquid penetrants used in non-destructive testing (NDT), and has advised that users should implement controls on exposure commensurate with the use of a suspect (category 3) carcinogen. (hse.gov.uk)
  • Aromatic azo compounds are synthetic organic chemicals which have strong colours. (hse.gov.uk)
  • Furthermore, the research method may serve as an important benchmark for handling potentially hazardous chemicals, such as azo compounds described herein. (mdpi.com)
  • This new edition of Destruction of Hazardous Chemicals in the Laboratory includes validated methods for safely degrading specific compounds, such as nitrosamines and aflatoxins, as well as general strategies that are applicable to all organic compounds. (researchandmarkets.com)
  • The analysis also uncovered a cluster of 78 unknown, nitrogen-rich brominated chemicals that accounted for about 85% of the mass of brominated compounds in the dust. (acs.org)
  • This compound group is populated by taking the more general compound group and subtracting the chemicals found in the relevent Annex. (pharosproject.net)
  • If a cyclic compound contains a ring with less than six members (i.e. three, four or five membered rings), the ring will be under strain and functional groups that make up part of the ring will often be much more reactive than they would in a straight-chain compound. (wikibooks.org)
  • Cyclic compounds are often formed by intramolecular reactions , meaning reactions in which different parts of the same molecule react with each other. (wikibooks.org)
  • Many azo dyes are produced by reactions from pre-existing azo compounds. (wikipedia.org)
  • Incorporating bromine in azo dyes could make the compounds more persistent and stable in the environment, Sun says. (acs.org)
  • they all natually break down to form a more stable compound with the liberation of a lone oxygen atom. (houserepairtalk.com)
  • Two azo-compounds, 2-methyl-4-(5-amino-2-hydroxy-phenylazo)-quinoline ( 2 ) and 2-methyl-4-(2-hydroxy-5-nitrophenylazo)-quinoline, derived from 4-amino-2-methylquinoline were synthesized. (scielo.br)
  • Synthetic azo-dyes are among the most explored classes of organic compounds. (scielo.br)
  • Aromatic azo compounds have been used in versatile applications in various fields because they are dominant in the synthetic colourants [ 5 - 11 ]. (rroij.com)
  • Food additives Azo dyes are synthetic compounds added to foods to impart color and improve their properties. (academicjournals.org)
  • Food additives are synthetic compounds added to food for many proposes such as maintaining the product from deterioration or improving its safety, freshness, taste, texture or appearance (WHO, 2012). (academicjournals.org)
  • PEX tubing shall be made from polyethylene compounds which have been crosslinked by peroxides, Azo compounds, or silane compounds in extrusion, or by electron beam after extrusion, or by other means such that the tubing meets the performance requirements. (environmental-expert.com)
  • 5. An electrophotographic photosensitive material of claim 4, wherein the thermoset silicone resin is a hydrolysis product of one or two or more types of compounds selected from a group of tetraalkoxy silane, trialkoxy silane, dialkoxy dialkylsilane, trichloralkyl silane and dichloralkyl silane, or its initial condensation reaction product. (patentgenius.com)
  • Accordingly, the production of benzidine azo dyes was discontinued in the 1980s in many western countries. (wikipedia.org)
  • They have to be converted to simpler hydrophilic compounds so that they are eliminated and their action is terminated. (slideserve.com)
  • I want to get the latest chemistry news from C&EN in my inbox every week. (acs.org)
  • The authors explained that they had to turn to the field of polymerization chemistry to find a compound that produces enough radicals. (eurekalert.org)
  • The N=N group is called an azo group . (wikipedia.org)
  • 3. A recording liquid as claimed in claim 1, wherein said at least one dye has a structure represented by formula (I) wherein m and n each is 1 and each SO 3 H group is bonded to the phenyl group at the ortho position with respect to the azo group. (google.de)
  • Azo dyes are known as the most important group in the organic colourants [ 3 , 4 ]. (rroij.com)
  • This compound contains an ester group that is part of a ring. (wikibooks.org)
  • In the current study, the role of microorganisms in biodegradation of six dyes related to azo group was discussed. (academicjournals.org)
  • 2001). Azo dyes are organic compounds containing an azo group (-N=N-), but some dyes have two (diazo), three (triazo) or more (Benkhaya et al. (academicjournals.org)
  • Thiocyano, isocyanate, or isocyanide dihalide group containing compound utilized (i.e. (uspto.gov)
  • Compound groups are useful because in some cases, lists will instead identify a group of structurally similar compounds (such as lead compounds) as all having the same hazard. (pharosproject.net)
  • The table below indicates how each compound group is populated, and what is the status of its population. (pharosproject.net)
  • This compound group has not yet been assigned a structural definition. (pharosproject.net)
  • Based on this idea, in the main chain of azo group containing polymers are of particular interest because of their unique photoelectrical characterization [ 4 - 6 ]. (hindawi.com)
  • This available method has recently been chosen by our group to obtain polyazo-compounds. (hindawi.com)
  • 4. A resin composition as claimed in claim 1, wherein the silicone compound (B) consists of a partial hydrolysis.condensation product of the organofunctional group-containing alkoxysilane compound (i), the tetraalkoxysilane compound (ii) and (iii) a trialkoxysilane compound. (patents.com)
  • It is found that, simultaneously, dihydrobenztriazolic units were formed as a result of cyclization reaction between amino and azo groups located in ortho position to each other. (hindawi.com)
  • 2,2'-Azobis (4-methoxy-2,4-dimethylvaleronitrile), a new lipid-soluble azo initiator: application to oxidations of lipids and low-density lipoprotein in solution and in aqueous dispersions. (semanticscholar.org)
  • There, the azo compound AIPH is a well-known polymerization initiator. (eurekalert.org)
  • As a result of this stability, photolysis is not considered to be a degradation pathway for azo dyes. (wikipedia.org)
  • Azo dyes have many different structures that monoazo, diazo and triazo dyes contain one N=N double bond, two and three N=N double bonds, respectively, but comparing with other the mono azo compounds constitute the vast majority [ 1 ]. (rroij.com)
  • This most often will be organic molecules which contain double carbon, double nitrogen and carbon-nitrogen bonds, and it's also these same kinds of bonds in organic compounds that give materials colour, taste and smell. (houserepairtalk.com)
  • 13-17 The electrochemical behavior and electrode reaction pathways of numerous azo-dyes in various supporting electrolytes were studied and discussed. (scielo.br)
  • PTSA-catalyzed diazotization and azo coupling reaction. (beilstein-journals.org)
  • Through the program, many priority substances, including polybrominated diphenyl ethers (PBDEs), other flame retardants, perfluorinated compounds (including PFOS and PFCAs), siloxanes, triclosan, bisphenol A (BPA) and metals, have been measured to provide environmental data for risk assessment and risk management decision making. (gc.ca)
  • The researchers singled out 549 unique brominated compounds in the house dust but could find matches for only 14% of the substances in the public database Chemspider. (acs.org)
  • An organic compound with multiple amino groups is called a diamine, triamine, tetraamine and so forth. (wikipedia.org)
  • Azo-dyes are widely used in many practical applications such as photochromic materials, colorants, non-linear optics, sensors and indicators. (scielo.br)
  • they are metabolized in the liver by azo reductase and excreted out in the urine (Hassan and Elnmer, 2017). (academicjournals.org)

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