Methylmaleic anhydrides.
Chemical compounds derived from acids by the elimination of a molecule of water.
Compounds used extensively as acetylation, oxidation and dehydrating agents and in the modification of proteins and enzymes.
Phthalic acid anhydrides. Can be substituted on any carbon atom. Used extensively in industry and as a reagent in the acylation of amino- and hydroxyl groups.
Used in copolymerization reactions, in the Diels-Alder(diene)synthesis, in the preparation of resins, pharmaceuticals and agricultural chemicals. It is a powerful irritant and causes burns.
A subclass of anhydrides with the general structure of dihydrofurandione. They can be substituted on any carbon atom. They modify and inhibit proteins and enzymes and are used in the acylation of amino- and hydroxyl groups.
A genus of mitosporic fungi containing about 100 species and eleven different teleomorphs in the family Trichocomaceae.
Infections with fungi of the genus ASPERGILLUS.
An analytical method used in determining the identity of a chemical based on its mass using mass analyzers/mass spectrometers.
Ring compounds having atoms other than carbon in their nuclei. (Grant & Hackh's Chemical Dictionary, 5th ed)
A species of imperfect fungi from which the antibiotic fumigatin is obtained. Its spores may cause respiratory infection in birds and mammals.
A highly reactive aldehyde gas formed by oxidation or incomplete combustion of hydrocarbons. In solution, it has a wide range of uses: in the manufacture of resins and textiles, as a disinfectant, and as a laboratory fixative or preservative. Formaldehyde solution (formalin) is considered a hazardous compound, and its vapor toxic. (From Reynolds, Martindale The Extra Pharmacopoeia, 30th ed, p717)
Any chemical species which accepts an electron-pair from a LEWIS BASE in a chemical bonding reaction.
Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).
Physical reactions involved in the formation of or changes in the structure of atoms and molecules and their interactions.
A plant family of the order Santalales, subclass Rosidae, class Magnoliopsida. They are parasites that form connections (haustoria) to their hosts to obtain water and nutrients. The one-seeded fruit may be surrounded by a brightly colored nut-like structure.
A clear, colorless, viscous organic solvent and diluent used in pharmaceutical preparations.
Hard, amorphous, brittle, inorganic, usually transparent, polymerous silicate of basic oxides, usually potassium or sodium. It is used in the form of hard sheets, vessels, tubing, fibers, ceramics, beads, etc.
Derivatives of propylene glycol (1,2-propanediol). They are used as humectants and solvents in pharmaceutical preparations.
Exclusive legal rights or privileges applied to inventions, plants, etc.
Presence of warmth or heat or a temperature notably higher than an accustomed norm.
Chemical reaction in which monomeric components are combined to form POLYMERS (e.g., POLYMETHYLMETHACRYLATE).
Inorganic oxides that contain nitrogen.
A class of compounds that contain a -NH2 and a -NO radical. Many members of this group have carcinogenic and mutagenic properties.
A technique using antibodies for identifying or quantifying a substance. Usually the substance being studied serves as antigen both in antibody production and in measurement of antibody by the test substance.
Heterocyclic compounds in which an oxygen is attached to a cyclic nitrogen.
Agents that remove, correct, repress, or mask undesirable ODORS. In personal hygiene, deodorants often contain astringent preparations that reduce SWEATING, referred to as ANTIPERSPIRANTS. (From Grant & Hackh's Chemical Dictionary, 5th ed)
A network of cross-linked hydrophilic macromolecules used in biomedical applications.
Macrocyclic polyethers with the repeating unit of (-CH2-CH2-O)n where n is greater than 2 and some oxygens may be replaced by nitrogen, sulfur or phosphorus. These compounds are useful for coordinating CATIONS. The nomenclature uses a prefix to indicate the size of the ring and a suffix for the number of heteroatoms.
Organic chemicals which have two amino groups in an aliphatic chain.
Materials in intermediate state between solid and liquid.
An allotropic form of carbon that is used in pencils, as a lubricant, and in matches and explosives. It is obtained by mining and its dust can cause lung irritation.
Reproduction of data in a new location or other destination, leaving the source data unchanged, although the physical form of the result may differ from that of the source.
The study of MAGNETIC PHENOMENA.
Substances made up of an aggregation of small particles, as that obtained by grinding or trituration of a solid drug. In pharmacy it is a form in which substances are administered. (From Dorland, 28th ed)
That portion of the electromagnetic spectrum from the UHF (ultrahigh frequency) radio waves and extending into the INFRARED RAYS frequencies.
A diffuse parenchymal lung disease caused by inhalation of dust and by tissue reaction to their presence. These inorganic, organic, particulate, or vaporized matters usually are inhaled by workers in their occupational environment, leading to the various forms (ASBESTOSIS; BYSSINOSIS; and others). Similar air pollution can also have deleterious effects on the general population.
Earth or other matter in fine, dry particles. (Random House Unabridged Dictionary, 2d ed)
The resistance that a gaseous or liquid system offers to flow when it is subjected to shear stress. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Sulfur compounds in which the sulfur atom is attached to three organic radicals and an electronegative element or radical.
The internal resistance of the BLOOD to shear forces. The in vitro measure of whole blood viscosity is of limited clinical utility because it bears little relationship to the actual viscosity within the circulation, but an increase in the viscosity of circulating blood can contribute to morbidity in patients suffering from disorders such as SICKLE CELL ANEMIA and POLYCYTHEMIA.
The visual display of data in a man-machine system. An example is when data is called from the computer and transmitted to a CATHODE RAY TUBE DISPLAY or LIQUID CRYSTAL display.
Input/output devices designed to receive data in an environment associated with the job to be performed, and capable of transmitting entries to, and obtaining output from, the system of which it is a part. (Computer Dictionary, 4th ed.)
Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY.
Nanometer-sized tubes composed mainly of CARBON. Such nanotubes are used as probes for high-resolution structural and chemical imaging of biomolecules with ATOMIC FORCE MICROSCOPY.
A heavy metal trace element with the atomic symbol Cu, atomic number 29, and atomic weight 63.55.
Relating to the size of solids.

Identification of a critical lysine residue in apolipoprotein B-100 that mediates noncovalent interaction with apolipoprotein(a). (1/19)

We have previously shown that lipoprotein(a) (Lp(a)) assembly involves an initial noncovalent interaction between sequences within apolipoprotein(a) (apo(a)) kringle IV types 5-8 and the amino terminus of apolipoprotein B-100 (sequences between amino acids 680 and 781 in apoB-100), followed by formation of a disulfide bond. In the present study, citraconylation of lysine residues in apoB-100 abolished the ability of the modified low density lipoprotein to associate with apo(a), thereby demonstrating a direct role for lysine residues in apoB in the first step of Lp(a) assembly. To identify specific lysine residues in the amino terminus of apoB that are required for the noncovalent interaction, we initially used an affinity chromatography method in which recombinant forms of apo(a) (r-apo(a)) were immobilized on Sepharose beads. Assessment of the ability of carboxyl-terminal truncations of apoB-18 to bind to r-apo(a)-Sepharose revealed that a 25-amino acid sequence in apoB (amino acids 680-704) bound specifically to apo(a) in a lysine-dependent manner; citraconylation of the lysine residues in the apoB derivative encoding this sequence abolished the binding interaction. Using fluorescence spectrometry, we found that a synthetic peptide corresponding to this sequence bound directly to apo(a); the peptide also reduced covalent Lp(a) formation. Lysine residues present in this sequence (Lys(680) and Lys(690)) were mutated to alanine in the context of apoB-18. We found that the apoB-18 species containing the Lys(680) mutation was incapable of binding to r-apo(a)-Sepharose columns, whereas the apoB-18 species containing the Lys(690) mutation exhibited slightly reduced binding to these columns. Taken together, our data indicate that Lys(680) is critical for the noncovalent interaction of apo(a) and apoB-100 that precedes covalent Lp(a) formation.  (+info)

Modification of amino groups of human-erythrocyte glycoproteins and the new concept on the structural basis of M and M blood-group specificity. (2/19)

1. Various kinds of modification of amino groups of M and N blood group glycoproteins abolished their capacity to inhibit rabbit and human anti-M and anit-N sera. 2. The reversible modification of amino groups revealed that M and N blood group activity was restored after the removal of amino-group-blocking residues. 3. Modification of amino groups had an entirely different effect on the reactivity of red cell glycoproteins with Vicia graminea agglutinin. The serological activity of N glycoprotein towards Vicia graminea anti-N agglutinin was unchanged, whereas the weak activity of M glycoprotein towards this anti-N agglutinin was increased to the level of the of N glycoprotein. 4. These results indicate that there is a structural difference between M and N glycoproteins, which resides beyond the oligosaccharide chains. It suggests in turn that M and N blood group specificity is determined by amino acid sequence in the peptide chains of red cell glycoproteins.  (+info)

Chemical modification of glucose oxidase: possible formation of molten globule-like intermediate structure. (3/19)

Chemical modification of lysine residues in glucose oxidase was carried out using citraconic anhydride. Modification brought about changes in the kinetic properties of the enzyme as evident by substantial lowering of V(max) and K(m). Enhancement of tryptophan fluorescence was observed with a dramatic change in its pH dependence due to modification. Near- and far-UV circular dichroism spectra of the native and modified forms suggested formation of molten globule-like structures, further supported by 8-anilino-1-naphthalenesulfonic acid fluorescence which indicated higher exposure of hydrophobic residues as a result of chemical modification.  (+info)

Increased thermal and organic solvent tolerance of modified horseradish peroxidase. (4/19)

Horseradish peroxidase (HRP) was modified by maleic anhydride and citraconic anhydride. The thermal and organic solvent tolerances of native and modified enzyme were compared. These chemical modifications of HRP increased their thermostability both in aqueous buffer and some organic solvents, and also enhanced their tolerances of some organic solvents. We have studied the unfolding of native and modified HRP by heat to determine the conformational stability. The temperature at the midpoint of thermal denaturation (T(m)) was increased upon modification. Both enthalpy change (DeltaH(m)) and entropy change (DeltaS(m)) for unfolding of modified enzyme at T(m) were decreased compared with native enzyme. Circular dichroism studies proved that these modifications changed the conformation of HRP. The improvements of stability are related to side chain reorientations of aromatics upon both modifications.  (+info)

Improvement of activity and stability of chloroperoxidase by chemical modification. (5/19)

BACKGROUND: Enzymes show relative instability in solvents or at elevated temperature and lower activity in organic solvent than in water. These limit the industrial applications of enzymes. RESULTS: In order to improve the activity and stability of chloroperoxidase, chloroperoxidase was modified by citraconic anhydride, maleic anhydride or phthalic anhydride. The catalytic activities, thermostabilities and organic solvent tolerances of native and modified enzymes were compared. In aqueous buffer, modified chloroperoxidases showed similar Km values and greater catalytic efficiencies kcat/Km for both sulfoxidation and oxidation of phenol compared to native chloroperoxidase. Of these modified chloroperoxidases, citraconic anhydride-modified chloroperoxidase showed the greatest catalytic efficiency in aqueous buffer. These modifications of chloroperoxidase increased their catalytic efficiencies for sulfoxidation by 12%~26% and catalytic efficiencies for phenol oxidation by 7%~53% in aqueous buffer. However, in organic solvent (DMF), modified chloroperoxidases had lower Km values and higher catalytic efficiencies kcat/Km than native chloroperoxidase. These modifications also improved their thermostabilities by 1~2-fold and solvent tolerances of DMF. CD studies show that these modifications did not change the secondary structure of chloroperoxidase. Fluorescence spectra proved that these modifications changed the environment of tryptophan. CONCLUSION: Chemical modification of epsilon-amino groups of lysine residues of chloroperoxidase using citraconic anhydride, maleic anhydride or phthalic anhydride is a simple and powerful method to enhance catalytic properties of enzyme. The improvements of the activity and stability of chloroperoxidase are related to side chain reorientations of aromatics upon both modifications.  (+info)

Chemical modifications of ribonuclease U1. (6/19)

In order to obtain information on the nature of the amino acid residues involved in the activity of ribonuclease U1 [EC 3.1.4.8], various chemical modifications of the enzyme were carried out. RNase U1 was inactivated by reaction with iodoacetate at pH 5.5 with concomitant incorporation of 1 carboxymethyl group per molecule of the enzyme. The residue specifically modified by iodoacetate was identified as one of the glutamic acid residues, as in the case of RNase T1. The enzyme was also inactivated extensively by reaction with iodoacetamide at pH 8.0 with the loss of about one residue each of histidine and lysine. When RNase U1 was treated with a large excess of phenylglyoxal, the enzymatic activity and binding ability toward 3'-GMP were lost, with simultaneous modification of about 1 residue of arginine. The reaction of citraconic anhydride with RNase U1 led to the loss of enzymatic activity and modification of about 1 residue of lysine. The inactivated enzyme, however, retained binding ability toward 3'-GMP. These results indicate that there are marked similarities in the active sites of RNases T1 and U1.  (+info)

Listeria monocytogenes phosphatidylinositol-specific phospholipase C: Kinetic activation and homing in on different interfaces. (7/19)

 (+info)

Chemical modification of lysine residues in lysozyme may dramatically influence its amyloid fibrillation. (8/19)

 (+info)

TY - JOUR. T1 - Formation of citraconic anhydride via condensation of dialkyl succinates and formaldehyde. AU - Shekhawat,Dushyant. AU - Nagarajan,Kirthivasan. AU - Jackson,James E.. AU - Miller,Dennis J.. PY - 2002. Y1 - 2002. N2 - The formation of citraconic anhydride (CAN) from the condensation of succinic acid and its derivatives with formaldehyde over oxide catalysts is described. Alumina and aluminum phosphate are active catalysts that give selectivity to citraconic anhydride as high as 75% in an integral fixed bed reactor. Weakly acidic sites on the catalyst surface, particularly Lewis acid sites, are responsible for activating the desired reaction pathway. Strongly acidic sites lead to cracking and coking, while basic sites facilitate the Cannizzaro reaction of formaldehyde to carbon dioxide and methanol. Catalyst deactivation via coking occurs over the course of reaction, but activity is easily restored by regeneration in air at elevated temperatures. The reaction system under ...
Mass spectrometry of heterocyclic compounds. XVIII. New secondary metabolites of Aspergillus wentii Wehmer. The positive and negative ion mass spectra produced by electron impact. Selva, A.; Traldi, P.; Camarda, L.; Nasini, G. Biomedical Mass Spectrometry (1980), 7(4), 148-52.. ...
0066] In a preferred embodiment of this application, the chelating agent employed for the preparation of solvent based compositions is selected from the group comprising polyols, gluconates, sorbitals, mannitols, carbonates, heptonates, hydroxamates, catechols, α-amino carboxylates, alkanolamines, metal-ion sequestrants, hydroxy-carboxylic acids, aminocarboxylic acids, amino polycarboxylic acids, polyamines, polyphosphates, phosphonic acids, crown ethers, amino acids, polycarboxylic acids, cyclodextrin, phosphonates, polyacrylates or polymeric polycarboxylates and condensed phosphates. However, the particular sequestering or chelating agents of the present application would include but are not limited to acetic acid, adenine, adipic acid, ADP, alanine, alanine, albumin, arginine, ascorbic acid, asparagine, aspartic acid, ATP, benzoic acid, n-butyric acid, casein, citraconic acid, citric acid, cysteine, dehydracetic acid, desferri-ferrichrysin, desferri-ferrichrome, desferri-ferrioxamin E, ...
TY - JOUR. T1 - alpha-chain sequence of newt haemoglobin (Taricha granulosa).. AU - Coates, M.. AU - Brimhall, B.. AU - Stenzel, Peter. AU - Hermodson, M.. AU - Gibson, D.. AU - Jones, R. T.. AU - Vedvick, T.. PY - 1977/4. Y1 - 1977/4. N2 - The amino acid sequence of the alpha-chain of the major haemoglobin of a newt, T. granulosa, has been determined. The chain is 142 residues long and has an extra methionine at its N-terminus when compared with human alpha-chain. Most of the tryptic peptides were sequenced by a combination of the subtractive Edman method and by deduction from the compositions of overlapping fragments produced by various enzymic treatments. The sequence of two core regions was obtained by automatic sequencing of large peptides produced by trypsin cleavage at arginine residues only after blockage of lysine residues by citraconylation; by cleavage between aspartic acid and proline residues with 70% formic acid, and by cyanogen bromide cleavage at methionine residues. The ...
The isomerization of glucose to its more reactive isomer fructose is one of the most important steps in the overall conversion to these platform chemicals (Fig. 1).3-6 This reaction is catalyzed by Lewis acids, and the most studied catalyst is Sn-Beta zeolite.7,8 The unique activity of Sn-Beta zeolite for the isomerization and retro-aldolization of carbohydrates (Fig. 1) stems from the strong Lewis acid Sn sites embedded in the framework of Beta zeolite.9 Other zeolites modified with Sn have also been considered for sugar conversions.10-14 Sn (and Ti)-modified MFI zeolites, which have narrower pores than Beta zeolite, were found to be inactive for glucose isomerization.9,12 Although the glucose isomerization activity of Sn-modified MWW zeolite was very low,11 this catalyst was highly active for the retro-aldolization of sugars to methyl lactate in methanol. Other Sn-containing materials such as amorphous silica with an ordered mesoporous structure such as Sn-SBA-15 and Sn-MCM-41 can also ...
3AGN: Isomerization mechanism of aspartate to isoaspartate implied by structures of Ustilago sphaerogena ribonuclease U2 complexed with adenosine 3-monophosphate
A proper understanding of reservoir connectivity is essential to understanding the relationship between the porosity and the permeability within it. Additionally, the construction of an accurate reservoir model cannot be accomplished without this information. While a great deal is known about the connectivity in conventional sandstone systems, little is understood about the connectivity and its resultant properties within shale systems. Percolation theory is a method to describe the global properties of the shale system by understanding the nanometer scale interaction of pore space. In this study we use both analytical and empirical techniques to further understand shale pore scale interactions as well as global phenomena of the shale system. Construction of pore scale connectivity simulations on lattice and in the continuum allow for understanding relationships between pore topology, system porosity and system permeability. Additionally, questions regarding the role of Total Organic Carbon as ...
Noncovalent interactions between cisplatin and graphene prototypes. Ma del Refugio Cuevas-Flores, Marco Antonio Garcia-Revilla and Massimiliano Bartolomei. ...
4-Chlorophthalic Anhydride | 118-45-6, chemical structure search 4-Chlorophthalic Anhydride including CAS No., molecular formula, chemical properties, chemical suppliers, price of chemical.
Endrtimes does not necessarily endorse or agree with every opinion expressed in every article/video posted on this site. The information provided here is done so for personal edification; Its up to the reader to separate truth from error, and to examine everything (like the Bereans) from a Biblical perspective. Let the Holy Scriptures be you guide! - - - FAIR USE NOTICE: These pages/videos may contain copyrighted (©) material the use of which has not always been specifically authorized by the copyright owner. Such material is made available to advance understanding of ecological, POLITICAL, HUMAN RIGHTS, economic, DEMOCRACY, scientific, MORAL, ETHICAL, and SOCIAL JUSTICE ISSUES, etc. It is believed that this constitutes a fair use of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, this material is distributed without profit to those who have expressed a prior general interest in receiving similar ...
Affiliation:九州大学,大学病院,研究員, Research Field:Morphological basic dentistry,Dental engineering/Regenerative dentistry,Periodontal dentistry,Social dentistry,Periodontology, Keywords:歯周病原細菌,Porphyromonas gingivalis,歯周炎,総頸動脈内膜中膜複合体,慢性辺縁性歯周炎,高次構造,安定型高次構造リポ多糖,歯周病,バイオフィルム,Tannerella forsythensis, # of Research Projects:5, # of Research Products:15, Ongoing Project:非熱的不可逆エレクトロポレーションによるインプラント周囲炎の低侵襲治療法
5-Fluoroisatoic Anhydride 321-69-7 NMR spectrum, 5-Fluoroisatoic Anhydride H-NMR spectral analysis, 5-Fluoroisatoic Anhydride C-NMR spectral analysis ect.
4124-31-6 Trichloroacetic anhydride testing. Laboratory testing for CAS number 4124-31-6. Trichloroacetic anhydride. This chemical is colourless liquid
[150 Pages Report] Check for Discount on 2016 Tetrahydrophthalic anhydride (THPA) (CAS 935-79-5) Industry Market Report report by Prof Research. The Global and Chinese Tetrahydrophthalic anhydride (THPA) Industry, 2011-2021...
Sigma-Aldrich offers Aldrich-441570, (R)-(+)-2-Acetoxysuccinic anhydride for your research needs. Find product specific information including CAS, MSDS, protocols and references.
Disclosed is the preparation of novel difunctional cyanate monomers with increased aromatic chain length between the cyanate groups and thermosetting re...
While providing protection in hazardous environments, a firefighter ensemble (FE) contributes to the development of uncompensable heat stress due to high clothing insulation and the reduction in evaporative heat loss. Prolonged exposure to heat stress increases the risk of overexertion and heat illness in firefighters and reduces the performance time (PT) and rate of recovery even at low work inte
An exhibitor staff member introduces Alipay to a visitor during the Alibaba E-Commerce Expo in Sydney, Australia, Aug. 30, 2019. (Xinhua/Bai Xuefei). Barclays Bank of Kenya is considering integrating WeChat Pay and Alipay into its virtual banking platform, an official said on Friday.. NAIROBI, Sept. 27 (Xinhua) -- Barclays Bank of Kenya is considering integrating WeChat Pay and Alipay into its virtual banking platform, an official said on Friday.. Andrew Mwithiga, head of virtual banking at the Barclays Bank of Kenya, told Xinhua in Nairobi that China has emerged as a key trading partner of Kenya and this has resulted in the need for the development of seamless channels for the timely and convenient settlement of cross border financial transactions.. We are keen to enter into strategic partnerships that transcends banks, telecommunication and financial technology companies both within inside and outside the country and this may include Wechat Pay and Alipay in order to improve our customer ...
We, China 2-Dodecen-1-ylsuccinic anhydride, mixtureof isomers Manufacturers, China 2-Dodecen-1-ylsuccinic anhydride, mixtureof isomers Suppliers, provide quality 2-Dodecen-1-ylsuccinic anhydride, mixtureof isomers product and the products related with China 2-Dodecen-1-ylsuccinic anhydride, mixtureof isomers - huichengchem
China Methyl Hexahydrophthalic Anhydride (MHHPA), Find details about China Mhhpa, Methyl Hexahydrophthalic Anhydride; from Methyl Hexahydrophthalic Anhydride (MHHPA) - Heze Kingvolt Chemical Co., Ltd.
Global Styrene-Maleic Anhydride Copolymer Market is a professional and in-depth study on the current state of the industry. The report provides a basic overview of the Styrene-Maleic Anhydride Copolymer market including definitions, classifications, applications and industry chain structure. This report also states import/export consumption, supply and demand figures, cost, price, revenue and gross margins, and the global market size (volume and value).. Access complete report at: https://www.themarketreports.com/report/2017-global-styrene-maleic-anhydride-copolymer-industry-depth-research-report. Key companies profiled in this report are Polyscope Polymers, Total Cray Valley (Tcv), Ineos, Sinopec, Baoding Lucky Chemical, Yinxin Chemical, Kaixin Fine Chemical more in terms of basic information, product categories, Sales (Volume), Revenue (Million USD), Price (USD/Unit) and Gross Margin (%) (2012-2017).. Global Styrene-Maleic Anhydride Copolymer Market Report covers Alternate Styrene-Maleic ...
Alfa Aesar™ Methoxyacetic anhydride, 95% 25g Alfa Aesar™ Methoxyacetic anhydride, 95% Mercaptoe to Methoxya -Organics
China Anhydride Acetic manufacturers - Select 2018 high quality Anhydride Acetic products in best price from certified Chinese Acetic manufacturers, Acetic Acid suppliers, wholesalers and factory on Made-in-China.com
DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click HERE to register or log in ...
Looking for chlorendic anhydride? Find out information about chlorendic anhydride. C9H2Cl6O3 White, fine crystals used in fire-resistant polyester resins, in hardening epoxy resins, and as a chemical intermediate Explanation of chlorendic anhydride
Wholesale Acetic Anhydride ☆ Find 73 acetic anhydride products from 46 manufacturers & suppliers at EC21. ☆ Choose quality acetic anhydride manufacturers, suppliers & exporters now - EC21
ALPHA CHEMIKA is an ISO 9001:2000 certified manufacturer, supplier & exporter of BOC ANHYDRIDE including all laboratory Chemicals, and offered to our clients at the best industry prices, Inquire us for more products details.
All metallic oxides that react with water to form a base solution are considered basic anhydrides, including lithium, magnesium, sodium and calcium oxides. Only the oxides formed by the alkali metals...
Thank you for your interest in spreading the word about Biochemical Journal.. NOTE: We only request your email address so that the person you are recommending the page to knows that you wanted them to see it, and that it is not junk mail. We do not capture any email address.. ...
Please submit a detailed description of your project. We will provide you with a customized project plan to meet your research requests. You can also send emails directly to for inquiries. ...
Daniel, It might be worth your while to attempt antigen retrieval at a pH of 10 or 11 in an electric pressure cooker. You could also try the double whammy (antigen retrieval and enzyme digestion(protease or trypsin)). If this fails then the tissue is problably beyond resuscitation. Susie Smith, HT/HTL(ASCP), B.S. Research Associate Cytologix Corporation -----Original Message----- From: Daniel Martinez [mailto:[email protected]] Sent: Tuesday, November 07, 2000 9:45 AM To: [email protected] Subject: Antigen Retrieval Methods I currently have a rare Parkinsons case that I am having trouble staining. This tissue has been fixing in formalin for 13yrs. I am attempting to stain this tissue with several alpha-synuclein antibodies that we produce. To date, I have tried formic acid, proteinase-K, microwave, and boiling treatments. Any advice on other methods that might be worth trying would be appreciated. Thanks for your help Dan Martinez CNDR/University of Pennsylvania ...
Looking for chloroacetic anhydride? Find out information about chloroacetic anhydride. C4H4Cl2O3 Crystals with a melting point of 46°C; soluble in chloroform and ether; used in the preparation of cellulose chloracetates and in the N... Explanation of chloroacetic anhydride
Bis(trifluoromethyl)thiophosphinic acid, (CF3)2P(S)OH, has been prepared by the reaction of concentrated sulfuric acid with salts of the acid. The new moderately strong monothio acid is stable in aqueous solution but yields 1 mol of CF3H per mole of acid upon alkaline hydrolysis. The acid has been characterized by chemical and spectroscopic methods including gas-phase infrared spectra which suggest that the acid has the (CF3)2P(S)OH structure. Dehydration of the acid with P4O10 proceeds smoothly to give good yields of the anhydride, ((CF3)2P(S))2O, which is extremely inert toward electrophilic reagents such as hydrogen halides and hydrogen sulfide. The infrared and nmr spectral properties of the acid and its anhydride are discussed. The anhydrides reactions are also discussed.(*ORGANIC PHOSPHORUS COMPOUNDS
Detection techniques using antibodies often fail to work on PFA- or formalin-fixed, paraffin-embedded sections. Antigen retrieval methods can then, in some cases, enable specific antibody detection. They work by reversing some of the chemical modification of epitopes during fixation. These procedures will not help much with epitope loss due to denaturation during sample treatment, like hot paraffin embedding. ...
I tried to do CD34 membrane antigen retrieval from paraffin embedded tissue section with microwave and enzyme methods, but just found these methods are not working. The protocols I used are as follows ...
Trypsin Enzymatic Antigen Retrieval Solution试剂datasheet (ab970).Abcam抗体、ELISA、激动剂拮抗剂、表观遗传试剂、蛋白多肽,使用效果保证,中国70%以上现货。
Maleic anhydride is the organic compound which is the maleic acids acid anhydride. It is produced in large quantities for the coatings and polymers applications.
The reaction between acetic anhydride and water is written as follows: (CH3CO)2O + H2O --| 2CH3COOH. This reaction produces two molecules of etanoic acid, a compound that appears as a colorless...
[65 Pages Report] Check for Discount on Valeric anhydride Global Market and Forecast Research report by ChemReport. DescriptionWe provide independent and unbiased information on manufacturers, prices, production...
阿拉丁试剂提供各种二氧化硒、二氧化硒 ;亚硒酐,无水亚硒酸 ;Selenium oxide Selenious anhydride Selenious acid anhydride、7446-08-4,二氧化硒 价格,二氧化硒 msds/coa,二氧化硒 性质,二氧化硒 结构式,二氧化硒 化学式,欢迎选购阿拉丁二氧化硒、7446-08-4试剂
Upon heating, itaconic anhydride isomerizes to citraconic acid anhydride, which can be hydrolyzed to citraconic acid (2- ... R. L. Shriner; S. G. Ford; l. J. Roll (1931). "Citraconic Anhydride and Citraconic Acid". Org. Synth. 28: 28. doi:10.15227/ ... R. L. Shriner; S. G. Ford; l. J. Roll (1931). "Itaconic anhydride and itaconic acid". Org. Synth. 11: 70. doi:10.15227/orgsyn. ... Dry distillation of citric acid affords itaconic anhydride, which undergoes hydrolysis to itaconic acid. ...
Citraconic acid can be produced via thermal isomerization of itaconic acid anhydride. The required itaconic acid anhydride is ... R. L. Shriner; S. G. Ford; l. J. Roll (1931). "Citraconic Anhydride and Citraconic Acid". Org. Synth. 28: 28. doi:10.15227/ ... R. L. Shriner; S. G. Ford; l. J. Roll (1931). "Itaconic anhydride and itaconic acid". Org. Synth. 11: 70. doi:10.15227/orgsyn. ...
Itaconic acid anhydride is isomerized to citraconic anhydride, which is hydrolyzed and the resulting acid further isomerized ... It is prepared from citric acid, which is first converted to itaconic anhydride by dehydration and decarboxylation. ...
... citraconic anhydrides MeSH D03.383.312.355 - furaldehyde MeSH D03.383.312.490 - lasalocid MeSH D03.383.312.520 - maleic ... anhydrides MeSH D03.383.312.600 - monensin MeSH D03.383.312.620 - nafronyl MeSH D03.383.312.634 - nigericin MeSH D03.383. ...
... citraconic acid can be produced by thermal isomerization of itaconic acid anhydride to give citraconic anhydride, which can be ... R. L. Shriner; S. G. Ford; l. J. Roll (1931). "Citraconic Anhydride and Citraconic Acid". Org. Synth. 28: 28. doi:10.15227/ ... The acid displays the unusual property of spontaneously forming the anhydride, which, unlike maleic anhydride, is a liquid at ... Citraconic acid is an organic compound with the formula CH3C2H(CO2H)2. It is a white solid. It is the cis-isomer of mesaconic ...
"Citraconic anhydride and citraconic acid". Organic Syntheses. doi:10.15227/orgsyn.011.0028. US 2258947, J.H. Crowell, " ... At temperatures above its melting point, itaconic anhydride is converted to citraconic anhydride. Even at significantly lower ... The proposed replacement of maleic anhydride by itaconic anhydride in the alkenylsuccinic anhydrides (frequently used for paper ... "Kinetic study of the isomerization of itaconic anhydride to citraconic anhydride", J. Org. Chem., 47 (8), pp. 1572-1574, doi: ...
Long-​chain derivatives of citraconic anhydride: new metabolites of Aspergillus wentii Wehmer. Assante, Gemma; Camarda, Lorenzo ...
Pre-heat steamer or water bath with staining dish containing Citraconic Anhydride Buffer until temperature reaches 95-100 °C.. ... Note: Since citraconic anhydride is considered a toxic agent, it is necessary to use a hood and to prevent contact with skin ... Citraconylation by citraconic anhydride provides an easy method for the reversible blocking of protein amino groups. The method ... 1. Namimatsu S, Ghazizadeh M and Sugisaki Y (2005) Reversing the effects of formalin fixation with citraconic anhydride and ...
Check for Discount on Citraconic anhydride Global Market and Forecast Research report by ChemReport. DescriptionWe provide ... The price of Citraconic anhydride in 2016 Major end users of Citraconic anhydride Potential users of Citraconic anhydride The ... Citraconic anhydride Global Market and Forecast Research Table of Contents Part 1: General Information of Citraconic anhydride ... 2.2 Construction of Industry Chain of Citraconic anhydride Chapter 3: End User of Citraconic anhydride List of Tables ...
Shekhawat, D., Nagarajan, K., Jackson, J. E., & Miller, D. J. (2002). Formation of citraconic anhydride via condensation of ... Formation of citraconic anhydride via condensation of dialkyl succinates and formaldehyde. Applied Catalysis A: General. 2002; ... The formation of citraconic anhydride (CAN) from the condensation of succinic acid and its derivatives with formaldehyde over ... Shekhawat, Dushyant ; Nagarajan, Kirthivasan ; Jackson, James E. ; Miller, Dennis J./ Formation of citraconic anhydride via ...
... and other polymers such that upon exposure to aqueous environments the acid anhydride generates the corresponding acid which ... s or other polymer is eroded by action of the acid anhydride incorporated therein. ... The invention relates to the use of an acid anhydride incorporated as a latentiated catalyst in poly(ortho ester) ... unsaturated: maleic or citraconic anhydrides. 3. Aromatic: Benzoic anhydride. 4. Aromatic dibasic: phthalic anhydride or ...
... citraconic acid can be produced by thermal isomerization of itaconic acid anhydride to give citraconic anhydride, which can be ... R. L. Shriner; S. G. Ford; l. J. Roll (1931). "Citraconic Anhydride and Citraconic Acid". Org. Synth. 28: 28. doi:10.15227/ ... The acid displays the unusual property of spontaneously forming the anhydride, which, unlike maleic anhydride, is a liquid at ... Citraconic acid is an organic compound with the formula CH3C2H(CO2H)2. It is a white solid. It is the cis-isomer of mesaconic ...
Upon heating, itaconic anhydride isomerizes to citraconic acid anhydride, which can be hydrolyzed to citraconic acid (2- ... R. L. Shriner; S. G. Ford; l. J. Roll (1931). "Citraconic Anhydride and Citraconic Acid". Org. Synth. 28: 28. doi:10.15227/ ... R. L. Shriner; S. G. Ford; l. J. Roll (1931). "Itaconic anhydride and itaconic acid". Org. Synth. 11: 70. doi:10.15227/orgsyn. ... Dry distillation of citric acid affords itaconic anhydride, which undergoes hydrolysis to itaconic acid. ...
Reversing the effects of formalin fixation with citraconic anhydride and heat: a universal antigen retrieval method. , The ... Reversing the effects of formalin fixation with citraconic anhydride and heat: a universal antigen retrieval method. Shigeki ... Namimatsu S, Ghazizadeh M, Sugisaki Y. Reversing the effects of formalin fixation with citraconic anhydride and heat: a ... Deparaffinized tissue sections were placed in an electric kitchen pot containing 0.05% citraconic anhydride solution, pH 7.4, ...
Fingerprint Dive into the research topics of The binding of acetic anhydride- and citraconic anhydride-modified human low- ... Valente, A. J., & Walton, K. W. (1984). The binding of acetic anhydride- and citraconic anhydride-modified human low-density ... Valente, Anthony J. ; Walton, K. W. / The binding of acetic anhydride- and citraconic anhydride-modified human low-density ... Valente, AJ & Walton, KW 1984, The binding of acetic anhydride- and citraconic anhydride-modified human low-density ...
i one or more maleic, citraconic or itaconic anhydrides and. *ii one or more monomers selected from allylic or methallylic ... D) Copolymers derived from C4-C8 monounsaturated carboxylic acids or anhydrides selected from:. (a) copolymers comprising: * *i ... 9) (C1-C5)alkyl vinyl ether/maleic anhydride copolymers partially modified by semiamidation with an N,N-dialkylaminoalkylamine ... The anionic styling polymers which are more preferred are selected from the monoesterified methyl vinyl ether/maleic anhydride ...
... anhydrides of unsaturated organic acids such as maleic anhydride, itaconic anhydride and citraconic anhydride; esters of ... Maleic anhydride is most preferred.. The modification can be achieved by grafting the modifier onto the crystalline propylene ... A)-3: 50 parts by weight of a propylene homopolymer modified with maleic anhydride (0.09% by weight), having an MFR of 30 g/10 ... A)-1: 50 parts by weight of a propylene homopolymer modified With maleic anhydride (0.08% by weight), having an MFR of 230 g/10 ...
Citraconic anhydride. Amine-reactive compound (CAS 616-02-4) to reversibly cap lysines and other primary amines with carboxyl ...
A 0.05% citraconic anhydride solution (ImmunoSaver; Nissin EM Co., Ltd., Tokyo, Japan) was used for antigen retrieval. ...
Suitable examples include maleic acid, maleic anhydride, itaconic acid, mesaconic acid, fumaric acid and citraconic acid. ... Maleic anhydride and itaconic acid are the preferred monoethylenically unsaturated dicarboxylic acid monomer(s). ... Preferred are neutralized carboxylic acid monomers or anhydrides. Preferred initiator compounds are those, wherein n is 0 or 1 ... ethylenically unsaturated dicarboxylic acids and the alkali metal and ammonium salts thereof as well as the anhydrides of the ...
... citraconic anhydride solution (Immunosaver, Nissin EM) for antigen retrieval. After blocking endogenous peroxidase activity and ...
... citraconic acid, ethacrylic acid, and tricarboxy ethylene, and salts and anhydrides thereof. ... 2. Carboxylic acid anhydride group-containing monomers: monoethylenically unsaturated polycarboxylic acid anhydrides, such as ... Especially preferred are copolymers of maleic acid, maleic anhydride, or malic acid salt with isobutylene or other C3 -C6, ... Exemplary types of such acid groups and other hydrophilic groups include carboxyl, carboxylic acid anhydride, carboxylic salt, ...
Representative of such anhydrides include maleic anhydride, citraconic anhydride, 5-norbornene-2,3-dicarboxylic anhydride, ... Polyimide with reduced anhydride content. US5175339 *. 14 May 1990. 29 Dic 1992. The Standard Oil Company. Process for ... 3,528,950 a low molecular weight prepolymer is prepared by reacting a poly-functional amine, a polyfunctional anhydride, and an ... Polyetherimides and precursors therefor from oxydiphtalic anhydride diester and a mixture of diamines. ...
This included 0.05% citraconic anhydride for 30 min at pH 7.4 at 100°C (Namimatsu et al., 2005) followed by 1% SDS/PBS (pH 7.4 ... 2005). Reversing the effects of formalin fixation with citraconic anhydride and heat: a universal antigen retrieval method. J. ... citraconic anhydride (Namimatsu et al., 2005) or 1% SDS/PBS (Brown et al., 1996)]. ...
... non-cyclic anhydride moleties bonded to the divalent organic moleties. ... Examples of suitable cyclic anhydrides include maleic, succinic, iraconic, citraconic, glutaric, phthalic and hexahydrophthalic ... d) non-cyclic anhydride moieties bonded to the divalent organic moieties and. (e) bonded to each non-cyclic anhydride moiety, a ... d) non-cyclic anhydride moieties bonded to the divalent organic moleties.. For example, the lower molecular weight anhydride is ...
Butenolides from citraconic anhydride and acetophenone: rearrangement to a 2, 3-dihydro-3-furanone related to bullatenone ... The reaction of 3-methyltricarballylic acid with acetic anhydride. Addendum: On Fittigs product from acylative decarboxylation ... The reaction of 3-methyltricarballylic acid with acetic anhydride: three products of acylative decarboxylation ...
dicarboxylic acids such as fumaric acid, maleic acid, citraconic acid and itaconic acid, or anhydrides ... or anhydrides thereof, or further succinic acid or its anhydride substituted with an alkenyl group having 6 to 18 carbon atoms ... 0084]As a dibasic carboxylic acid, it may include benzene dicarboxylic acids or anhydrides thereof, such as phthalic acid, ... terephthalic acid, isophthalic acid and phthalic anhydride; alkyldicarboxylic acids such as succinic acid, adipic acid, sebacic ...
Long-​chain derivatives of citraconic anhydride: new metabolites of Aspergillus wentii Wehmer. Assante, Gemma; Camarda, Lorenzo ...
Also useful in the present invention are acid anhydrides, such as maleic anhydride, wherein the anhydride group is formed by ... citraconic acid, fumaric aid, mesaconic acid, muconic acid, glutaconic acid, aconitic acid and the like. ... Method for curing polymers containing one or more carboxy or anhydride functions by means of polymers having hydroxyamide ...
... citraconic acid, vinyl succinic acid, and maleic acid, as well as their acid anhydrides and mixtures. ... is a half ester of an acid anhydride such as maleic anhydride. A preferable substituted styrene is α-methylstyrene. ...
Examples of α,β-unsaturated carbonyl compounds include, for example, maleic anhydride, citriconic anhydride, and the like. ... citraconic acid, chloromaleic acid, dimeric methacrylic acid, nadic acid, tetrahydrophthalic acid, endo- ... They can comprise varying styrene to maleic anhydride mole ratios, for example, 1:1 to 4:1 and include partial monoesters. Such ... Other block copolymers include low molecular weight block copolymers of styrene and maleic anhydride. ...
... β-unsaturated dicarboxylic acid anhydride to produce the corresponding polymerizable half-ester compound, or by esterification ... such as maleic anhydride, itaconic anhydride and citraconic anhydride; or an acryloyl halide, such as acryloyl chloride, ... Copolymers of cyclic conjugated dienes and maleic anhydride US4524188A (en) 1985-06-18. Synthesis and copolymerization of ... The reaction product of Example 1 (40 g.,) is dissolved in a solution of maleic anhydride (15.4 g., 0.157 moles) in 25 ml. of ...
... followed by introducing citraconic anhydride dropwise. The reaction was kept at room temperature overnight to form carboxyl. ...
The maleic anhydride copolymers thus obtained have repeating anhydride linkages in the molecule, which are readily hydrolyzed ... citraconic acid, alpha-dimethyl maleic acid, alpha-butyl maleic acid, fumaric acid, aconitic acid, as well as partial salts, ... cross-linked copolymers of maleic anhydride and ethylene, as well as the hydrophilic maleic anhydride copolymers with vinyl ... Anhydrides of any of the aforesaid acids can also be employed.. Comonomers which can be used with the above functional monomers ...
... maleic anhydride, itaconic anhydride, citraconic anhydride, allylsuccinic anhydride, 4-cyclohexene,1,2-dicarboxylic anhydride, ... 3-dicarboxylic anhydride and x-methylbicyclo(2,2,2)hept-5-ene-2,2-dicarboxylic anhydride. Maleic anhydride is advantageously ... The functional derivatives of these acids comprise, for example, the anhydrides, the ester derivative, the anhydrides, the ... The monomer X is advantageously an unsaturated carboxylic acid anhydride such as, for example, maleic anhydride. ...
... and pH on the regeneration of the amino groups of ovalbumin after modification with citraconic and dimethylmaleic anhydrides ... Modification of the amino and hydroxyl groups of lysozyme with carboxylic acid anhydrides: a comparative study ... Pitfalls in the use of carboxylic acid anhydrides for structural studies of nucleoprotein particles ...
  • Human plasma low-density lipoprotein (LDL) was modified chemically with either the monocarboxylic acid derivative, acetic anhydride, or the dicarboxylic acid derivative, citraconic anhydride, reagents which react principally with the lysine residues of protein. (uthscsa.edu)
  • Valente, AJ & Walton, KW 1984, ' The binding of acetic anhydride- and citraconic anhydride-modified human low-density lipoprotein to mouse peritoneal macrophages The evidence for separate binding sites ', Biochimica et Biophysica Acta (BBA)/Lipids and Lipid Metabolism , vol. 792, no. 1, pp. 16-24. (uthscsa.edu)
  • Positive violet colour test with FeCl3 sol'n in H2O, so instead of taking the 15 minutes to do even a basic melting point on it, away we went to waste a liter of acetic anhydride. (sciencemadness.org)
  • The formation of citraconic anhydride (CAN) from the condensation of succinic acid and its derivatives with formaldehyde over oxide catalysts is described. (msu.edu)
  • The invention relates to the use of an acid anhydride incorporated as a latentiated catalyst in poly(ortho ester) and other polymers such that upon exposure to aqueous environments the acid anhydride generates the corresponding acid which catalyzes the matrix erosion. (google.com)
  • The releasing rate of a loaded drug substance incorporated into or surrounded by the poly(ortho ester) or other polymers can be controlled in that the drug is released as the poly(ortho ester)s or other polymer is eroded by action of the acid anhydride incorporated therein. (google.com)
  • Citraconic acid is an organic compound with the formula CH3C2H(CO2H)2. (wikipedia.org)
  • Citraconic acid can be produced, albeit inefficiently, by oxidation of xylene and methylbutanols. (wikipedia.org)
  • The acid displays the unusual property of spontaneously forming the anhydride, which, unlike maleic anhydride, is a liquid at room temperature. (wikipedia.org)
  • In the laboratory, citraconic acid can be produced by thermal isomerization of itaconic acid anhydride to give citraconic anhydride, which can be hydrolyzed to citraconic acid. (wikipedia.org)
  • The required itaconic acid anhydride is obtained by dry distillation of citric acid. (wikipedia.org)
  • Dry distillation of citric acid affords itaconic anhydride, which undergoes hydrolysis to itaconic acid. (wikipedia.org)
  • Upon heating, itaconic anhydride isomerizes to citraconic acid anhydride, which can be hydrolyzed to citraconic acid (2-methylmaleic acid). (wikipedia.org)
  • The use of citric acid in e-liquids needs to be investigated to further understand its potential to form potentially harmful anhydrides in the vapour. (medicalxpress.com)
  • Starting at around 175-203°C, citric acid can degrade to form citraconic anhydride and its isomer itaconic anhydride. (medicalxpress.com)
  • Citric acid in an e-liquid may lead to significant amounts of citraconic and/or itaconic anhydride in vapour, depending on the device,' says Dr Sandra Costigan, Principal Toxicologist Vaping Products. (medicalxpress.com)
  • Based on this case study using a first generation e-cigarette, we recommend that the potential for formation of citraconic and itaconic anhydrides should be investigated further before commercialisation of e-liquids containing citric acid ,' Costigan said. (medicalxpress.com)
  • and 1-butene copolymers prepared from 1-butene and ethylene or alpha olefins having 3 to about 10 carbonatoms, with monomers selected from the group consisting of unsaturated carboxylic acid esters, unsaturated carboxylic acids, unsaturated carboxylic anhydrides, vinyl monomers, acrylic monomers, or mixtures thereof. (patentgenius.com)
  • The six carboxylic acid scaffolds obtained by the reaction with maleic anhydride were further reacted with 12 diverse amines to generate a 72-member isoquinolone-amide library. (organic-chemistry.org)
  • I am on the hunt for a reference for the synthesis of 1,3 Acetone dicarboxylic acid anhydride from 1940. (sciencemadness.org)
  • It can be produced via dehydration of succinic acid, via catalytic hydrogenation of maleic anhydride, or as a by-product of adipic acid production. (intratec.us)
  • Chemically-modified collagen is prepared by reacting native collagen with a di or tri-carboxylic acid halide, di or tri-sulfonyl halide, di or tri-anhydride, or di or tri-reactive active ester coupling agent. (justia.com)
  • Any remaining lysine epsilon amino groups present in the coupled collagen product may be converted to carboxyamido or sulfonamido groups by acid halide, anhydride, sulfonyl halide or active ester amine-modifying agents. (justia.com)
  • Here we developed a novel immunohistochemical technique using trypsin, formic acid, and hydrated autoclaving using citraconic anhydride buffer to increase sensitivity of staining for scrapie proteins and immune cell subsets. (usda.gov)
  • Based on previous reports on the role of hydrophobicity and charge on skin penetration of polymers, our approach relied on modifying the PAMD with citraconic anhydride for a negative charge and oleic acid for lipophilicity. (unmc.edu)
  • 1. Namimatsu S, Ghazizadeh M and Sugisaki Y (2005) Reversing the effects of formalin fixation with citraconic anhydride and heat: a universal antigen retrieval method. (ihcworld.com)
  • Reversing the effects of formalin fixation with citraconic anhydride and heat: a universal antigen retrieval method. (docphin.com)
  • To achieve a universal antigen retrieval method for immunohistochemistry under a constant condition, we developed a new method in which the effects of formalin fixation were reversed with citraconic anhydride (a reversible protein cross-linking agent) plus heating. (docphin.com)
  • 7 . Structure according to claim 1 or 2 , in which the binder is a polyethylene grafted with maleic anhydride, having an MFI of 0.1 to 3, a density of between 0.920 and 0.930 and containing 2 to 40% by weight of insolubles in n-decane at 90 C. (google.com.au)
  • Succinic Anhydride is a cyclic dicarboxylic anhydride and a tetrahydrofurandione. (intratec.us)
  • Paraffin-embedded tissue sections (as shown in Table 2 ) were obtained from Biochain Institute (Hayward, CA) and treated with a citraconic anhydride antigen retrieval procedure ( 23 ). (aacrjournals.org)
  • Deparaffinized tissue sections were placed in an electric kitchen pot containing 0.05% citraconic anhydride solution, pH 7.4, and the pot was set at "keep warm" temperature mode of 98C for 45 min. (docphin.com)
  • Citraconylation by citraconic anhydride provides an easy method for the reversible blocking of protein amino groups. (ihcworld.com)
  • Alumina and aluminum phosphate are active catalysts that give selectivity to citraconic anhydride as high as 75% in an integral fixed bed reactor. (msu.edu)
  • In particular, the structures and performances of various homogeneous catalysts are presented for the epoxide-anhydride copolymerization. (rsc.org)
  • He joined the Williams research group in 2012, working on the synthesis of new catalysts for ROCOP (CO 2 -epoxide and epoxide-anhydride) and developing the new switch catalysis. (rsc.org)
  • Anhydrides are very versatile as they can undergo condensation reactions to give polyesters, -imides, -ester-amides, and -ester-imides. (sigmaaldrich.com)
  • Chemical modification of lysine residues in glucose oxidase was carried out using citraconic anhydride. (courtfield.tk)
  • Anhydride polymers with a repeating structure of RC(=O)OC(=O)R. They readily hydrolyze in water making them useful for DELAYED-ACTION PREPARATIONS. (umassmed.edu)
  • EP 282951-A for example describes co-polymers based on maleic anhydride and polyalkylene glycol ether, for the preparation of controlled release formulations. (sparrho.com)
  • Using pigments with a deposition aid, such as Gantrez® (copolymers of maleic anhydride and with methyl vinylether) in toothpaste to make teeth look whiter is disclosed in EP1935395B1. (justia.com)
  • Pre-heat steamer or water bath with staining dish containing Citraconic Anhydride Buffer until temperature reaches 95-100 ° C. (ihcworld.com)
  • Long-​chain derivatives of citraconic anhydride: new metabolites of Aspergillus wentii Wehmer. (aspergillus.org.uk)
  • Information profiles on potential occupational hazards: organic anhydrides. (cdc.gov)
  • The organic anhydrides appeared to be moderately toxic with median lethal dose levels for rats ranging from 697 to 2600mg/kg. (cdc.gov)
  • Since citraconic anhydride is considered a toxic agent, it is necessary to use a hood and to prevent contact with skin and eyes when performing the AR procedure, although the concentration needed was very low. (ihcworld.com)
  • The maleic, phthalic, acetic and trimellitic anhydrides appeared to be the most acutely toxic of the group discussed. (cdc.gov)
  • These anhydrides are respiratory sensitisers-chemicals that, on inhalation, can trigger an allergic reaction varying from hay fever symptoms to anaphylactic shock. (medicalxpress.com)
  • A set of six dienes containing an attached secondary amine functionality were reacted with maleic anhydride (R 2 = H) or citraconic anhydride (R 2 = Me) at 165 C for 1.5 h to afford the isoquinolone products 1 in one step. (organic-chemistry.org)
  • Intratec provides Succinic Anhydride price trend estimates in the main world regions, covering the past 13 years. (intratec.us)
  • We provide independent and unbiased information on manufacturers, prices, production news and consumers for the global and regional (North America, Asia and Europe) market of Citraconic anhydride. (reportsnreports.com)
  • Injection site tumors have occurred following administration of succinic and maleic anhydrides. (cdc.gov)