Azo CompoundsAmaranth Dye: 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)Oxidative Coupling: The reaction of two molecular entities via oxidation usually catalyzed by a transition metal compound and involving dioxygen as the oxidant.AmidinesEncyclopedias as Topic: 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)ImidesTextilesPotentiometry: 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)Electrodes: Electric conductors through which electric currents enter or leave a medium, whether it be an electrolytic solution, solid, molten mass, gas, or vacuum.Mannich Bases: 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.Electrochemistry: The study of chemical changes resulting from electrical action and electrical activity resulting from chemical changes.QuinaldinesFluorocarbon PolymersTransition Elements: Elements with partially filled d orbitals. They constitute groups 3-12 of the periodic table of elements.Pigments, Biological: Any normal or abnormal coloring matter in PLANTS; ANIMALS or micro-organisms.Petroleum Pollution: Release of oil into the environment usually due to human activity.Pigment Epithelium of Eye: The layer of pigment-containing epithelial cells in the RETINA; the CILIARY BODY; and the IRIS in the eye.Patents as Topic: Exclusive legal rights or privileges applied to inventions, plants, etc.Retinal Pigments: 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.Fuel Oils: 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.Petroleum: Naturally occurring complex liquid hydrocarbons which, after distillation, yield combustible fuels, petrochemicals, and lubricants.Carbonic Anhydrase I: A cytosolic carbonic anhydrase isoenzyme primarily expressed in ERYTHROCYTES, vascular endothelial cells, and the gastrointestinal mucosa. EC 4.2.1.-Infant Formula: Liquid formulations for the nutrition of infants that can substitute for BREAST MILK.Search Engine: Software used to locate data or information stored in machine-readable form locally or at a distance such as an INTERNET site.Chromatography, High Pressure Liquid: Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed.Foramen Ovale, Patent: 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.Sulfenic Acids: 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)History of NursingCyclization: Changing an open-chain hydrocarbon to a closed ring. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)Halogenation: Covalent attachment of HALOGENS to other compounds.Combinatorial Chemistry Techniques: 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.Pargyline: A monoamine oxidase inhibitor with antihypertensive properties.Kainic Acid: (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.Chorismate Mutase: An isomerase that catalyzes the conversion of chorismic acid to prephenic acid. EC 5.4.99.5.Confined Spaces: 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.Polyurethanes: A group of thermoplastic or thermosetting polymers containing polyisocyanate. They are used as ELASTOMERS, as coatings, as fibers and as foams.Ventilation: 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)WeldingFood Packaging: 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.Product Packaging: Form in which product is processed or wrapped and labeled. PRODUCT LABELING is also available.Toluene 2,4-Diisocyanate: Skin irritant and allergen used in the manufacture of polyurethane foams and other elastomers.Acrylamide: 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.Polymers: Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).Cross-Linking Reagents: 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.Absorbable Implants: 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.Acrylamides: 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.Phototherapy: Treatment of disease by exposure to light, especially by variously concentrated light rays or specific wavelengths.Molecular Sequence Data: Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.Coloring Agents: Chemicals and substances that impart color including soluble dyes and insoluble pigments. They are used in INKS; PAINTS; and as INDICATORS AND REAGENTS.Treatment Outcome: Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.Liposomes: Artificial, single or multilaminar vesicles (made from lecithins or other lipids) that are used for the delivery of a variety of biological molecules or molecular complexes to cells, for example, drug delivery and gene transfer. They are also used to study membranes and membrane proteins.Azides: Organic or inorganic compounds that contain the -N3 group.

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)

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 + ...
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... ...
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...
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 …
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.. ...
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
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
The perspective of adding stimuli-response to isoporous membranes stimulates the development of separation devices with pores, which would open or close under control of environment chemical composition, temperature or exposure to light. Changes in pH and temperature have been previously investigated. In this work,
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
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.. ...
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 ...
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 - ...
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!
Dendra2 is a monomeric, green-to-red photoswitchable fluorescent protein. Use Dendra to track protein movement, degradation, etc. in real time.
Dendra2 is a monomeric, green-to-red photoswitchable fluorescent protein. Use Dendra to track protein movement, degradation, etc. in real time.
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.
... 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.
Main Zone Tuner Frequency Sirius 001,@TFQ:000001. Main Zone Tuner Frequency Sirius 002,@TFQ:000002. Main Zone Tuner Frequency Sirius 003,@TFQ:000003. Main Zone Tuner Frequency Sirius 004,@TFQ:000004. Main Zone Tuner Frequency Sirius 005,@TFQ:000005. Main Zone Tuner Frequency Sirius 006,@TFQ:000006. Main Zone Tuner Frequency Sirius 007,@TFQ:000007. Main Zone Tuner Frequency Sirius 008,@TFQ:000008. Main Zone Tuner Frequency Sirius 009,@TFQ:000009. Main Zone Tuner Frequency Sirius 010,@TFQ:000010. Main Zone Tuner Frequency Sirius 011,@TFQ:000011. Main Zone Tuner Frequency Sirius 012,@TFQ:000012. Main Zone Tuner Frequency Sirius 013,@TFQ:000013. Main Zone Tuner Frequency Sirius 014,@TFQ:000014. Main Zone Tuner Frequency Sirius 015,@TFQ:000015. Main Zone Tuner Frequency Sirius 016,@TFQ:000016. Main Zone Tuner Frequency Sirius 017,@TFQ:000017. Main Zone Tuner Frequency Sirius 018,@TFQ:000018. Main Zone Tuner Frequency Sirius 019,@TFQ:000019. Main Zone Tuner Frequency Sirius 020,@TFQ:000020. Main Zone ...
Autori: M. Neamtu, C. Catrinescu, and A. Kettrup. Editorial: Appl. Catal. B: Environmental, 51, p.147-155, 2004.. Rezumat:. Cuvinte cheie: heterogeneous fenton, reactive dye, zeolites. ...
grinding is frequently used in the preparation of tcm as part of the extraction and the number of spectra representative of the model equipment factors and human factors examples include the addition of golden orange ii to hong-hua flos w j li x l chen w j li f wei x y xiao r c linrapid and direct ...
Hi everybody, , I wonder if anyone knows how to separate and visualise small proteins , (4-10 kDa) on a gel. I tried gradients, high percentage gels and , Tris-tricine gels w/o any luck. When I stain with Coomassie or Ponceau , (after transfer onto 0.2 u nitrocellulose) I can see nice bands up from , 10 kDa. Below that point nothing shows up! Also, I tried blotting with , specific abs w/o any success. I would appreciate any suggestions. , Cheers, Marcin You should try high precent acril amid, like 15% Look here http://www.proteinchemist.com/tutorial/sdspage.html Yoram ------------------------------------------------------------------------ This message was sent using IMP, the Webmail Program of Haifa University ...
The simplest would be to cut out the band and place it in dialysis tubing, and re-electrophorese. Visualizing the band before excising will require picking the right dye and avoiding conditions that would fix the protein (methanol, acetic acid). Not sure if ponceau would work. Also, choose a low MW cut off for the tubing because SDS will denature the protein, making it easier to slither through the pores ...
Uno, K.; Bossi, M. L.; Irie, M.; Belov, V. N.; Hell, S. W.: Reversibly photoswitchable fluorescent diarylethenes resistant against photobleaching in aqueous solutions. Journal of the American Chemical Society 141 (41), pp. 16471 - 16478 (2019 ...
Mr Murray Stewart does not hold a share or financial interest in this hospital, another Nuffield Health hospital or the company.. Mr Murray Stewart does not have a share or financial interest in equipment used at this hospital or another Nuffield Health hospital.. Mr Murray Stewart does not hold any paid advisory role(s) at this hospital or on behalf of Nuffield Health.. ...
Preface ix. Chemicals Sorted by Chemical Groups 1. Technologies Applicable to Specific Chemicals 11. Alcohols 11. Aldehydes 12. Aldehydes and Ketones 13. Aldehydes or Ketones with Other Functional Groups 13. Aliphatic Hydrocarbons 14. Aliphatic Nitriles and Cyanates 20. Aliphatic Nitrosamines 21. Aliphatic Organophosphorous Compounds 21. Alkanes and Cyclic Alkanes 21. Alkenes, Cyclic Alkenes, and Dienes 26. Alkyl Halides 27. Alkynes 28. Aluminum 28. Americium 29. Amides 30. Amines 30. Antimony 31. Aromatic Amines and Diamines 31. Aromatic Nitriles and Cyanates 34. Aromatic Nitro Compounds 34. Aromatic Nitro Compounds with Other Functional Groups 35. Aromatic Organophosphorous Compounds 35. Aromatics with Halogenated Side Chain 35. Arsenic 37. Azo Compounds 40. Azo Compounds, Hydrazine Derivatives 40. Barium 40. Benzene and Monosubstituted Benzene Hydrocarbons 42. Benzene and Substituted Benzene Hydrocarbons 67. Benzene, Toluene, Ethylbenzene, and Xylene (BTEX) 67. Beryllium 73. Bismuth ...
Voltage-jump and light-flash experiments have been performed on isolated Electrophorus electroplaques exposed simultaneously to nicotinic agonists and to the photoisomerizable compound 2,2-bis-[alpha-(trimethylammonium)methyl]-azobenzene (2BQ). Dose-response curves are shifted to the right in a nearly parallel fashion by 2BQ, which suggests competitive antagonism; dose-ratio analyses show apparent dissociation constants of 0.3 and 1 microM for the cis and trans isomers, respectively. Flash-induced trans----cis concentration jumps produce the expected decrease in agonist-induced conductance; the time constant is several tens of milliseconds. From the concentration dependence of these rates, we conclude that the association and dissociation rate constants for the cis-2BQ-receptor binding are approximately 10(8) M-1 s-1 and 60 s-1 at 20 degrees C; the Q10 is 3. Flash-induced cis----trans photoisomerizations produce molecular rearrangements of the ligand-receptor complex, but the resulting ...
Accepted June 17th, 2014.. Abstract. In this work we have calculated global and local DFT reactivity descriptors for tartrazine at B3LYP/6-311++G (2d,2p) level. Global reactivity descriptors such as ionization energy, molecular hardness, electrophilicity, and total energies were calculated to evaluate the tartrazine reactivity in aqueous and gas conditions. Local reactivity was evaluated through the Fukui function. The influence of the solvent was taken into account with the PCM model. The results indicate that the solvation process modifies the reactivity descriptors values. From our results, it was found that an electrophilic attack allows a direct cleavage of the N=N bond. If a nucleophilic attack is considered as initial attack, it is necessary a second attack by free radicals or electrophiles to cleave the N=N bond. In the case of an initial attack by free radicals, tartrazine requires a subsequent nucleophilic attack to cleave the N=N bond.. Keywords: tartrazine, reactivity, Fukui, B3LYP, ...
A photo-responsive amide cleavage device was developed based on the asparagine imidation-mediated cleavage of peptide bonds during intein-mediated protein splicing. The chemical environment of the protein splicing process was mimicked by the incorporation of geminal dimethyl groups and a secondary amine unit in asparagine scaffold. Furthermore, the resulting photo-responsive device could induce the photo-triggered cleavage of an amide bond by the protection of the secondary amine unit with an o-nitrobenzyloxycarbonyl group ...
Constipation may reflect both peripheral involvement, indicated by Lewy bodies in the colonic myenteric plexus, leading to colonic inertia, and central mechanisms, leading to pelvic floor dysfunction. Also the peak tailing was substantially diminished, giving an ability to separate DNA adducts equal to or better than the TLC method. Individuals with asthma often have comorbid mental health conditions, the rates of which are also marked by significant racial and ethnic disparities. The performance of a chemoselective addition of diheteroarylzincs to aryldiazonium salts allows an efficient preparation of new heterocyclic azo compounds. These direct vascular effects are related to vascular tissue levels of cheap viagra online canada 5-methyltetrahydrofolate rather than plasma levels. Treatment discontinuation with peg-interferon: what to consider. AL amyloidosis may be associated locally with pulmonary lymphoma. Mock-ups of 15 prototype canada pharmacy viagra online features were developed based on ...
Journal of Nanomaterials is a peer-reviewed, Open Access journal that aims to bring science and applications together on nanoscale and nanostructured materials with emphasis on synthesis, processing, characterization, and applications of materials containing true nanosize dimensions or nanostructures that enable novel/enhanced properties or functions. It is directed at both academic researchers and practicing engineers. Journal of Nanomaterials will highlight the continued growth and new challenges in nanomaterials science, engineering, and nanotechnology, both for application development and for basic research. All papers should emphasize original results relating to experimental, theoretical, computational, and/or applications of nanomaterials ranging from hard (inorganic) materials, through soft (polymeric and biological) materials, to hybrid materials or nanocomposites.
This blog was originally set up for my own revision purposes, and not for other people to read, so you cant rely on everything that I have written. Obviously the notes are combinations of what my teachers have taught me, what my tutor has said and things I have found in revision guides or sites, so Id like to think that everything is reliable! This is just my disclaimer and a little note to make sure that it is understood I may have made mistakes that I wouldnt want anyone to repeat! ...
Get FREE question bank, notes, formulae, tips and tricks. Solved practice questions for IIT-JEE, Find all the formulas, full chapter notes, tips and tricks to prepare on Amines and Diazonium Salts (Comp. containing Nitrogen) for IIT-JEE
Alfa Chemistry is the worlds leading provider for special chemicals. We offer qualified products for 42904-20-1(1,3-Benzenedicarboxylicacid, 5-[(ethoxycarbonyl)amino]-),please inquire us for 42904-20-1(1,3-Benzenedicarboxylicacid, 5-[(ethoxycarbonyl)amino]-).
The intestinal microflora are capable of performing a wide variety of metabolic transformations. The intestinal bacteria can enhance the function of the entire gastrointestinal tract, protect against pathogenic, maintain the vital chemical balance of the gastrointestinal system, and produce needed vitamins and hormones (http;//www.upwardquest.com/crit2.html). Some of the products of this metabolism have been associated with carcinogenic processes, such as cancer, tumor formation, gastrointestinal disease, and infections. The ability of human intestinal microbes to interact with metabolites directly or after recirculation may contribute toward different toxicological disorders and disease. The purpose of this study is to characterize and isolate the azoreductase gene in Citrobacter freundii.
6-Diazo-5-oxo-L-norleucine 157-03-9 Precursor and Downstream products, 6-Diazo-5-oxo-L-norleucine Precursor products, 6-Diazo-5-oxo-L-norleucine Downstream products ect.
Buy Sulfonated Acetone-formaldehyde water reducer, Find Details include Size,Weight,Model and Width about Sulfonated Acetone-formaldehyde water reducer. Make an Inquiry for Sulfonated Acetone-formaldehyde water reducer at OKorder.com.
A photoswitch is designed for use as the switching element in a 2 GHz class E amplifier. The application of this amplifier is as the final-stage amplifier in the transmit-receive module of a phased-array radar system. The ...
Lookchem Provide Cas No.127080-01-7 Basic information: Properties,Safety Data,Sds and Other Datebase. We also Provide Trading Suppliers & Manufacture for 127080-01-7 (1Z)-N-[(ethoxycarbonyl)oxy]ethanimidoyl chloride.
Introduction. To determine the enthalpy changes of reaction for some reactive metals, with hydrochloric acid. Sodium carbonate can be used as a standard to determine acid concentration, because it is readily available in a pure and dry form. Here 7.5g is used to make up a 250cm solution with a concentration of 0.283 moldm .The calculations show this; The exact concentration of hydrocloric acid, is found by titrating it against the standard solution. Apparatus Chemicals 2 decimal place balance; HCl (exact weighing jar; concentration not known teat pipette; between 2.0 and 2.5moldm); pipette; burette; screened methyl orange; conical flask; anhydrous sodium carbonate. 250cm measuring flask and bung; 100cm measuring cylinder; white tile; clamp stand. Safety points. Solutions of HCl greater than or equal to 2moldm are irritant to the skin and eyes. A lab coat should be worn and direct contact with acid avoided. Na CO is also irritant, same preucautions should be taken. ...read more. Middle. Repeat ...
Hi Sally, I use the ORO stain found in Freida Carsons Histotechnology text book with consistent results. You do have to use a gentle hand when applying the coverslip and use an aqueous mounting media. Betsy Molinari HT (ASCP) Texas Heart Institute Cardiovascular Pathology 6770 Bertner Ave. Houston,TX 77030 832-355-6524 832-355-6812 (fax) -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Sally Prouty Sent: Sunday, November 20, 2005 10:53 PM To: [email protected] Subject: [Histonet] oil red o I am trying to locate a protocol for a consistant Oil red O stain. I dont know if it is in coverslipping where the stain is moving off the fat cells or in my differentiation step. I am staining on frozen skeletal muscle sections. Any suggestions would be helpful. Thank you, Sally Sally J. Prouty HHMI/University of Iowa Kevin Campbell Laboratory 400 EMRB Iowa City, Iowa 52246 319-335-6944 ...
A multilayer analytical element for analysis of analyte in a liquid sample comprising a liquid sample-spreading layer, a reagent layer containing a diazonium salt, and a liquid-impermeable light-transmissive support, being laminated in this order, in which said reagent layer contains a sulfonic acid group-containing polymer having at least 10 molar % of a repeating unit selected from those consisting of a sulfoalkyl group and sulfophenyl group. The analytical element can be an element comprising a porous reagent layer containing a diazonium salt and the liquid-impermeable light-transmissive support, being laminated in this order.
These experiments examine changes in the agonist-induced conductance that occur when the agonist-receptor complex is perturbed. Voltage-clamped Electrophorus electroplaques are exposed to the photoisomerizable agonist trans-Bis-Q. A 1-microsecond laser flash photoisomerizes some trans-Bis-Q molecules bound to receptors; because the cis configuration is not an agonist, receptor channels close within a few hundred microseconds. This effect is called phase 1. We compare (a) the fraction of channels that close during phase 1 with (b) the fraction of trans-Bis-Q molecules that undergo trans leads to cis photoisomerization. Parameter a is measured as the fractional diminution in voltage-clamp currents during phase 1. Parameter b is measured by changes in the optical spectra of Bis-Q solutions caused by flashes. At low flash intensities, a is twice b, which shows that the channel can be closed by photoisomerizing either of two bound agonist molecules. Conventional dose-response studies with trans-Bis-Q ...
Citation: Zeiger, E., Anderson, B., Haworth, S., Lawlor, T., and Mortelman, K. Salmonella Mutagenicity Tests V. Results from the Testing of 311 Chemicals Environ. Molec. Mutagen. Vol. 19 (Suppl 21) (1992) 2- ...
Tartrazine is a synthetic lemon yellow azo dye primarily used as a food coloring. It is also known as E number E102, C.I. 19140, FD&C Yellow 5, Acid Yellow 23, Food Yellow 4, and trisodium 1-(4-sulfonatophenyl)-4-(4-sulfonatophenylazo)-5-pyrazolone-3-carboxylate).. Tartrazine is a commonly used color all over the world, mainly for yellow, and can also be used with Brilliant Blue FCF (FD&C Blue ...
Oil Red O Lipid Stain kit is used to demonstrate adipocites and neutral triglicerides. This is also useful to demonstrate adipogenesis. Fat cells and neutral fat will be coloured in red and the nuclei in blue.
Food portal Azo compound Acid dye E number Federal Food, Drug, and Cosmetic Act Food additive Ian P. Freeman, "Margarines and ... Red colors are often azo compounds. The pair indigo and indigo carmine exhibit the same blue color, but the former is soluble ... Diazo dyes are prepared by coupling of a diazonium compound with a second aromatic hydrocarbons. The resulting compounds ... The color of the dyes can be controlled by selecting the number of azo-groups and various substituents. Yellow shades are often ...
Direct Formation of cis-Azo Compounds". J. Org. Chem. 26 (6): 1764. doi:10.1021/jo01065a017. Markies, P; Schat, Gerrit; ... Diphenylzinc is an organozinc compound. It is commonly used as the synthetic equivalent of a Ph− synthon. Solvent-free ... "Coordinational behavior of solvent-free diorganylzinc compounds: the remarkable x-ray structure of dimeric diphenylzinc". ...
Azo, Diazo, Azido, Hydrazine and Azide compounds. Esters, Sulphate Esters, Phosphate Esters, Thiophosphate Esters and Borate ... The chemical compound is susceptible to highly toxic and flammable phosphine gas formation in the presence of strong reducing ... Triazofos is a chemical compound used in acaricides, insecticides, and nematicides. Triazofos has been registered in the ...
ISBN 952-5216-18-7. Azo compounds#European regulation Gardiner, Bryan (15 September 2010). "Yamaha's NS-10: The Most Important ... when used as a wrapper for food as a result of degradation of Azo compounds used as paper dyes. In the late 1970s and early ...
... is an organic compound and an azo dye. It is one of the first water soluble dyes to be commercialized, and one of ... It is derived by the azo coupling reaction of phenyldiazonium and 2,4-diaminotoluene. At one time it was a popular food ...
Azo compounds perform Cis-trans isomerism upon receiving UV-Vis light. The most complex molecular machines are proteins found ... "Design and synthesis of Ʌ-shaped photoswitchable compounds employing Tröger's base scaffold". Synthesis. 49 (6): 1214-1222. ...
... is an organic compound and an azo compound. It is a widely used yellow pigment. It is also classified as a ...
Azo compounds can isomerize by absorbing a particular wavelength of light. This photoisomerization transforms the azo group ... Novel azo carrying molecules are introduced as molecular hinges which can be used in the design of molecular machines and ... Design and synthesis of Ʌ-shaped photoswitchable compounds employing Tröger's base scaffold. Synthesis 2017, 49 (6), 1214-1222 ... photochromic compounds, azobenzenes, spiropyrans, diarylethenes, fulgides, overcrowded alkenes. ...
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 ...
It is a free radical-generating azo compound. It is gaining prominence as a model oxidant in small molecule and protein ... 2,2'-Azobis(2-amidinopropane) dihydrochloride (AAPH) is a chemical compound used to study the chemistry of the oxidation of ... Antioxidant activity of phenolic compounds in 2,2′-azobis (2-amidinopropane) dihydrochloride (AAPH)-induced oxidation: ...
... is a chemical compound used to study the chemistry of the oxidation of drugs. It is a free radical-generating azo compound. It ... Persistent radical compounds are those whose longevity is due to steric crowding around the radical center, which makes it ... For example, the reactivity of nucleophilic ions with α,β-unsaturated compounds (C=C-C=O) is directed by the electron- ... They also play a key role in the intermediary metabolism of various biological compounds. Such radicals can even be messengers ...
... 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. ...
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 are often unstable. They are often stored cold. March, Jerry (1985 ... Typical examples are halogen molecules, azo compounds, and organic and inorganic peroxides. Halogens undergo the homolytic ... "Peroxo Compounds, Inorganic", Ullmann's Encyclopedia of Industrial Chemistry, Weinheim: Wiley-VCH, doi:10.1002/14356007.a19_177 ...
... is usually coloured with artificial food colouring, azo compounds often being used. red colouring: Azorubine (E ...
... 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 ...
... 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. ...
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 ...
"Respiration and growth of Shewanella decolorationis S12 with an azo compound as the sole electron acceptor." Applied and ...
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 ...
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 ... Many phenazine compounds are found in nature and are produced by bacteria such as Pseudomonas spp., Streptomyces spp., and ... Phenazine is an organic compound with the formula (C6H4)2N2. It is a dibenzo annulated pyrazine, and the parent substance of ...
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 ... The acetylide group with its metal derivatives This class contains for instance organic compounds of mercury, thallium, and ...
... is an organic compound that is one of many azo dyes. It is used as a substantive dye for textiles with high ... It is prepared by the azo coupling of the aminonaphthalene and diazotized derivative of o-dianisidine. Dye at "Chemical Book" ... Klaus Hunger, Peter Mischke, Wolfgang Rieper, Roderich Raue, Klaus Kunde, Aloys Engel: "Azo Dyes" in Ullmann's Encyclopedia of ...
... , or azo(bis)formamide, is a chemical compound with the molecular formula C2H4O2N4. It is a yellow to orange- ...
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, are a family of organic compounds used as pigments. They are ...
Amides are also chemical compounds. They are made by reacting carboxylic acids like acetic acid with amines. There are many ...
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 ...
The commercial success of azo dyes motivated the development of azo compounds in general. Aliphatic azo compounds (R and/or R ... Aryl azo compounds are usually stable, crystalline species. Azobenzene is the prototypical aromatic azo compound. It exists ... aliphatic) are less commonly encountered than the aryl azo compounds. A commercially important alkyl azo compound is ... 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 ...
Title: Mesoporous Manganese Oxide Catalyzed Aerobic Oxidative Coupling of Anilines To Aromatic Azo Compounds. ... "Mesoporous Manganese Oxide Catalyzed Aerobic Oxidative Coupling of Anilines To Aromatic Azo Compounds". Germany. doi:10.1002/ ... title = {Mesoporous Manganese Oxide Catalyzed Aerobic Oxidative Coupling of Anilines To Aromatic Azo Compounds},. author = { ... Mesoporous Manganese Oxide Catalyzed Aerobic Oxidative Coupling of Anilines To Aromatic Azo Compounds ...
... has recently reviewed the information available about the incorporation of the azo compound CI Solvent Red 164 within liquid ... Aromatic azo compounds are synthetic organic chemicals which have strong colours. This makes them suitable for use as dyes. ... The use of liquid dye penetrants containing the azo compound CI Solvent Red 164 in the detection of flaws or cracks in metal ... The use of liquid dye penetrants containing the azo compound CI Solvent Red 164 in the detection of flaws or cracks in metal ...
... or Azoxy-compounds: European Union Market Outlook 2017 and Forecast till 2022 provides a complete overview of the market ... 2.1.4. Diazo-, azo- or azoxy-compounds: prices. 3. LOCAL MARKETS FOR DIAZO-, AZO- OR AZOXY-COMPOUNDS (2012-2016). 3.1. The ... Market for Diazo-, azo- or azoxy-compounds in the EU countries (2012-2016). 2.1.1. Diazo-, azo- or azoxy-compounds: production ... Table 2. Diazo-, azo- or azoxy-compounds output in EU28, 2012-2016 (tons). Table 3. Dynamics of diazo-, azo- or azoxy-compounds ...
Synthetic azo-dyes are among the most explored classes of organic compounds. Azo-dyes are widely used in many practical ... of azo-compounds reported in the literature,27 0.01 mol of the starting compound, 4-amino-2-methylquinoline (1) (Aldrich), was ... of each of the investigated azo-compounds. Recovery of the characteristic colored azo-dye27,33 in solution confirmed the ... Synthesis, electrochemical, spectrophotometric and potentiometric studies of two azo-compounds derived from 4-amino-2- ...
The present invention provides a compound and a pigment dispersant, each of which improves the dispersibility of various types ... a condensed azo compound, an isoindoline compound, an anthraquinone compound, an azo metal complex, a methine compound, a ... a condensed azo compound, an anthraquinone compound, a basic dye lake compound, a benzimidazolone compound, a thioindigo ... Azo Skeleton Structure of Compound Having Azo Skeleton Structure First, the azo skeleton structure will be described. As the ...
"Photocatalytic reduction of nitroarenes to azo compounds over N-doped TiO2: relationship between catalysts and chemical ... This work deals with selective reduction of aromatic nitro compounds to corresponding symmetrical substituted azo compounds ... A mechanism of formation for the azo compounds is proposed. The behavior of the N/TiO2 catalyst is of particular interest ... Various azo compounds containing additional reducible substituents including halogens, and carboxyl and phenol functions have ...
Azo Compounds. Known as: Azo Compounds [Chemical/Ingredient], Compounds, Azo, azo compound ... The oxidation of methyl linoleate in solution initiated with azo compounds has been studied in the absence and presence of… ( ... F344 rats were fed compounds containing a nitro, azo, or amine-glucuronide group-2-nitronaphthalene (CAS: 581-89-5), 2… (More) ... decreased production of free amines from aromatic nitro compounds, azo dyes, and glucuronides. ...
... azo-salicylaldehyde (X = H, CH3 and Br). Furthermore, derivatives of Schiff bases (c1-3) have been prepared by the reduction of ... Four new azo-azomethine ligands (b2, b3, c2 and c3) have been prepared from the reaction of 4, 4′ (diamino diphenyl) methane ... Synthesis, Characterization and Antioxidant Activity Studies of New Azo-Compounds. Latifa Kribaa, Salem Atia, Aicha Boudehane, ... Four new azo-azomethine ligands (b2, b3, c2 and c3) have been prepared from the reaction of 4, 4′ (diamino diphenyl) methane ...
Topics: aromatic amines; azo compounds; bladder tumour; carcinogens; epidemiologic study; Germany; hazard evaluation; neoplasms ... The following workplace exposures showed some evidence of excess risk: chromium compounds, chromium (VI) compounds, inorganic ... Many volatile organic compounds (VOCs) are emitted during the manufacturing of thin film transistor liquid crystal displays ( ... Exposure to volatile organic compounds and kidney dysfunction in thin film transistor liquid crystal display (TFT-LCD) workers ...
Azo compounds). 原料:印染染料成分. 致癌物質 ...
azo compounds; skin allergies; duplicating; clothing industry; eczema. Descriptors (secondary). 4-diethylaminobenzenediazonium ...
Magenta poly-azo compounds. US5519121 *. 24. Febr. 1995. 21. Mai 1996. Bayer Aktiengesellschaft. Triazinyl-amino bridge- ... B) The monoazo compound obtained is added to a suspension of cyanuric chloride while maintaining a pH of 4 to 6 and a ... A) A monoazo compound is produced from 2-aminobenzoic acid and 1-amino-8-hydroxy-3,6-naphthalenedisulfonic acid (H-acid) ... The property of quick drying after printing and print quality can be improved further by adding a compound selected from urea, ...
UV calculations of some azo-ester derivatives substituted 4-acryloyloxy group in the gas phase and the solvent phases (ethanol ... Some azo compounds may contain electron donating substituents in both A and B. In some azo compounds as D-A-N=N-B type in which ... Azo dyes are known as the most important group in the organic colourants [3,4]. Aromatic azo compounds have been used in ... Azo compounds have the general formula A-N=N-B where A and B indicate the aromatic structures conjugated with azo group. In ...
Topics: allergens; aromatic azo compounds; naphthol as; case study; clothing; dermatitis; dyes; eczema; gas chromatography; ... The compound was used as a preservative in wood treatment products manufactured at her workplace. Based on animal studies, IPBC ... Thanks to its outstanding bactericidal properties, its low cost and the ease of use of some if its compounds, chlorine is ... Recent regulatory trends have caused the withdrawal of many active substances, in particular organophosphorus compounds and ...
1.4 Azo Compounds 15. 1.4.1 Azodicarboxylates 15. 1.4.1.1 Allylic Amination through Ene-Type Reactions 15 ... 4 Isocyanide-Based Multicomponent Reactions (IMCRs) as a Valuable Tool with which to Synthesize Nitrogen-Containing Compounds ... while a chemist pursuing synthetic work on these challenging compounds will find numerous examples, procedures, and citations ...
Azo compounds. *Chlorite/chlorate/perchlorates. *Fulminates. *Nitro compounds. *Nitro esters. *Other compounds with excess ... Strained ring compounds. Additional Resources:. Please keep in mind when chemical reactions are not properly managed, they can ... Air reactive chemicals are chemicals which react violently in contact with air or oxygen or with compounds containing oxygen. ...
azo group azo compound RN2R azobenzene, C6H5N2C6H5 ... phenyl compound C6H5R hydroxyl group phenol ArOH phenol, C6H5OH ... nitro compound RNO2 nitroethane, C2H5NO2. phenyl group ... This compound contains an ester group that is part of a ring. ... Cyclic compounds and intramolecular reactions[edit]. Exam questions often ask you to identify a functional group that forms ... If a cyclic compound contains a ring with less than six members (i.e. three, four or five membered rings), the ring will be ...
If the azo compound exists in an inappropriately stored or transported condition, the decrease in thermal stability may cause a ... Azo compounds have high exothermic characteristics and low thermal stability, which have caused many serious thermal accidents ... such as azo compounds described herein. View Full-Text Keywords: azo compound; free initiator; calorimetric and product ... If the azo compound exists in an inappropriately stored or transported condition, the decrease in thermal stability may cause a ...
Furthermore, instead of water, low-boiling hydrocarbons such as pentane, hexane, heptane, pentene and heptene; azo compounds ... Chain extending agents which may be employed in the preparation of polyurethane foams include those compounds having at least ... Also included with the term "polyhydric alcohol" are compounds derived from phenols such as Bisphenol A. ... as well as other organometallic compounds such as are disclosed in U.S.Pat. No. 2,846,408. ...
... azo compounds such as azobisisobutyronitrile; inorganic compounds such as, potassium persulfate and redox couples such as ...
Diazo compounds synonyms, Diazo compounds pronunciation, Diazo compounds translation, English dictionary definition of Diazo ... compounds. adj. Relating to or containing a pair of bonded nitrogen atoms, one of which is also bonded to a carbon atom. adj 1 ... See also azo. 2. (Printing, Lithography & Bookbinding) Also: dyeline of or relating to the reproduction of documents using the ... Diazo compounds - definition of Diazo compounds by The Free Dictionary https://www.thefreedictionary.com/Diazo+compounds ...
18.2.1 Azo ]Linked Compounds 437. 18.2.2 Amino Acid Conjugates 440 ... 12.4.1 Prodrugs of Compounds Containing COOH or OH 241. 12.4.2 Prodrugs of Compounds Containing Amides, Imides, and Other ...
Selection of particular components in a compound, and formulation of the compound(s) in a composition permit different ... The compounds have a Dye that, when photoactivated, operates via Type I and/or Type II mechanisms. Other Dye or azide ... A targeting moiety may be added to the compound or composition so that the Dye locates at a particular site, such as a hormone- ... The compounds and compositions may be incorporated within liposomes. ...
  • Benzene is a natural constituent of crude oil, but it is usually synthesized from other compounds present in petroleum. (bionity.com)
  • Albert Ladenburg proposed this structure for the compound now known as benzene. (wikipedia.org)
  • Sudan III (1-(4-(phenyldiazenyl)phenyl) azonaphthalen-2-ol) is used for mostly the same application but has for example a melting point that is 68 °C higher than that of Sudan I and it has one more benzene ring attached to one more azo bond. (wikipedia.org)
  • The behavior of the N/TiO2 catalyst is of particular interest because this is the first time, as far as we know, that formation of azo compounds has been catalyzed by an N-doped TiO2 photocatalyst. (deepdyve.com)
  • Among sp2-centered carbanions, vinyllithium compounds, vinylcuprates, and vinyl Grignard reagents react with electrophilic aminating reagents to afford enamines. (wikipedia.org)
  • The mechanism of formation of orthometalated azobenzene derivative was described to proceed via initial coordination of azo-nitrogen followed by electrophilic substitution at the pendant phenyl ring. (wikipedia.org)
  • 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)
  • 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)
  • 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)
  • 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)
  • Due to steric repulsions, azo violet is most stable in the trans-configuration, but isomerization of azo dyes by irradiation is not uncommon. (wikipedia.org)
  • Many compounds containing a sulfur-sulfur double bond have been reported in the past although only a few verified classes of actually stable compounds exist, closely related to thiosulfoxides. (wikipedia.org)
  • 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)