Celluloseacetate also known as zyl, zylonite, ref name allaboutvision.com http www.allaboutvision.com ... Note The trade name for Celluloseacetate manufactured by Soc. des Usines Chim. Rhone Poulenc , Paris ... 38&osCsid 15ea42c03992923bd58716f5c471178b ref , first prepared in 1865, is the acetate ester of cellulose . Celluloseacetate is used as a film base in photography , as a component in some adhesive ... discovered that cellulose could react with acetic anhydride to form celluloseacetate in 1865 ... that hydrolyzed celluloseacetate is soluble in more solvents like acetone . German chemist Eduard ... really limitless potentialities, they deliberately selected that of celluloseacetate products, including ... of Celluloid Acetate sheets and Cellulose Nitrate sheets worldwide. Today this warm and aesthetically ... the first commercial celluloseacetate yarn. The yarn was sold primarily for crochet ing, trimming ... fibers, although no longer produced in the United States, contain a higher ratio of acetate to cellulose than do acetate fibers sup 1 sup . Celluloseacetate film Celluloseacetate film was introduced ... film. Celluloseacetate computer tape Celluloseacetate magnetic tape was introduced by IBM in 1952 ... I computer. In 1956 celluloseacetate magnetic tape was replaced by the more stable PET film biaxially oriented PET film magnetic tape for use on their IBM 727 tape drive. Fiber Celluloseacetate ... acetate. The Dreyfus brothers initially focused on celluloseacetate film , which was then widely .... Production File Celluloseacetate preparation.png 400px right The Federal Trade Commission definition for acetate fiber is A manufactured fiber in which the fiber forming substance is celluloseacetate. Where not less than 92 percent of the hydroxyl groups are acetylated, the term cellulose triacetate triacetate may be used as a generic description of the fiber. Acetate is derived from cellulose ... of the cellulose is uneven, and thereby will the quality of the celluloseacetate sometimes ... more details
orphan date December 2009 Celluloseacetate phthalate CAP , also known as cellacefate and cellulosi acetas phthalas , is a commonly used polymer phthalate in the formulation of pharmaceuticals , such as the enteric coating of Tablet pharmacy tablets or capsule pharmacy capsules and for controlled release formulations. It is a cellulose polymer where about half of the hydroxyl s are esterified with acetyl s, a quarter are esterified with one or two carboxyls of a phthalic acid , and the remainder are unchanged. Its CAS number is 9004 38 0 . It is a hygroscopic white to off white free flowing powder, granules, or flakes. It is tasteless and odorless, though may have a weak odor of acetic acid . Its main use in pharmaceutics is with enteric coating enteric formulations . It can be used together with other coating agents, e.g. ethyl cellulose . Celluloseacetate phthalate is commonly plasticizer plasticized with diethyl phthalate , a hydrophobic compound, or triethyl citrate , a hydrophilic compound other compatible plasticizers are various phthalates, triacetin , dibutyl tartrate , glycerol ... common way to prepare celluloseacetate phthalate consists of the reaction of a partially substituted celluloseacetate CA with phthalic anhydride in the presence of an organic solvent and a basic catalyst. The organic solvents widely used as reaction media for the phthaloylation of celluloseacetate are acetic acid , acetone , or pyridine . The basic catalysts employed are anhydrous sodium acetate when using acetic acid, amines when using acetone, and the organic solvent itself when using ... cellulose and celluloseacetate without the use of pyridine by substituting sodium acetate as catalyst ... Hiatt, Preparation of Phthalic Acid Esters of Cellulose, Journal of Industrial and Engineering Chemistry External links http www.enerex.ca articles enteric coating.htm Enteric coating Category Cellulose Category Phthalates Category Acetate esters ... more details
Celluloseacetate film , or safety film , is used in photography as a base material for photographic ... for unstable and highly flammable Nitrocellulose Nitrate film nitrate film . Beginning with cellulose diacetate in 1909, this innovation continued with celluloseacetate propionate and celluloseacetate butyrate in the 1930s, and finally in the late 1940s, cellulose triacetate was introduced ... tension. These physical changes happen because celluloseacetate consists of long chains ... to brittleness. Shrinkage also occurs during this process. With the celluloseacetate polymer chains ... of celluloseacetate film. Enclosures that are breathable or that contain an acid absorbent ... would be an ideal way to preserve the contents of celluloseacetate film, current standards do .... ref www.filmpreservation.org preservation film guide.html ref Other uses Celluloseacetate film .... The Degradation and Stabilization of the Historic Celluloseacetate Nitrate Base Motion picture ... DEFAULTSORT CelluloseAcetate Film Category Cellulose Category Photography equipment Category ... picture industry continued to use cellulose nitrate supports until the introduction of cellulose ... syndrome The first instance of cellulose triacetate degradation was reported to the Eastman Kodak ... upon film stability following frequent reports of cellulose triacetate degradation. This material ... Erbland. Stability of Cellulose Ester Base Photographic Film Part I Laboratory Testing Procedures. SMPTE Journal 101 no.5 1992 336. ref The progression of degradation In acetate film, acetyl CH sub 3 sub CO groups are attached to long molecular chains of cellulose . With exposure to moisture, heat ... M. Reilly. Basic Strategy for Acetate Film Preservation. Microform and Imaging Review 31 no.4 2002 ... is released during the initial acetate base deterioration, leading to the characteristic vinegar odor ... renders motion picture film unusable. As the acetate base shrinks, the gelatin emulsion of the film ... more details
Group R Organic esters Organic acids Celluloseacetate Acetic acid and acetic anhydride H or C O ... Propanoic acid H or C O CH sub 2 sub CH sub 3 sub Celluloseacetate propionate Acetic acid and propanoic acid H or C O CH sub 3 sub or C O CH sub 2 sub CH sub 3 sub Celluloseacetate butyrate Acetic ... sub 3 sub H The celluloseacetate and cellulose triacetate are film and fiber forming materials that find ... Bonding System in Cellulose I from Synchrotron X ray and Neutron Fiber Diffraction journal J. Am ... author3 Chanzy . ref ImageFile Cellulose Sessel.svg ImageSize 260px ImageName Cellulose, a linear polymer of D glucose units two are shown linked by 1 4 glycosidic bonds. ImageFile1 Cellulose Ibeta from xtal 2002 3D balls.png ImageSize1 260px ImageName1 Three dimensional structure of cellulose ... EUIndex not listed Autoignition Section8 Chembox Related OtherCpds Starch Cellulose is an organic compound ... 471 05743 6 ref ref cite journal author Updegraff DM title Semimicro determination of cellulose in biological ... 2697 69 80009 6 pmid 5361396 issue 3 ref Cellulose is the structural component of the primary cell ... it to form biofilm s. Cellulose is the most common organic compound on Earth. About 33 of all plant matter is cellulose the cellulose content of cotton is 90 and that of wood is 40 50 . ref Cellulose ... 20Wood.pdf Chemical Composition of Wood ref For industrial use, cellulose is mainly obtained from wood ... into a wide variety of derivative products such as cellophane and rayon . Converting cellulose ... fuel source. Some animals, particularly ruminant s and termite s, can digestion digest cellulose with the help of symbiosis symbiotic micro organisms that live in their guts. Humans can digest cellulose ... first3 JA title Neutral detergent fiber, hemicellulose and cellulose digestibility in human subjects ... Cellulose was discovered in 1838 by the French chemist Anselme Payen , who isolated it from ... , Comptes rendus , vol. 8, pages 51 53. In this report, the word cellulose is coined and author points ... more details
largest use of acetic acid is consumed in the production of celluloseacetate . In fact, acetate is jargon for celluloseacetate, which is used in the production of fibres or diverse products, e.g. the acetate disc s used in audio record production. Celluloseacetate can be found in many ... category acetates Acetic acid Acetylation Celluloseacetate Copper II acetate Fermentation biochemistry ...Other uses Image Acetate anion canonical form 2D skeletal.png thumb 100px acetate anion Image Acetate ester 2D skeletal.png thumb 100px acetate ester An acetate IPA en s te t pron is a derivative of acetic ... in the production of acetates, which usually take the form of polymers. In nature, acetate is the most ... C2 units derived from acetate. ref March, J. Advanced Organic Chemistry 4th Ed. J. Wiley and Sons ... of the acetate anion is written as CH sub 3 sub CO sub 2 sub sup &minus sup , C sub 2 sub ... acetate as OAc sup &minus sup or AcO sup &minus sup . Thus, HOAc is the abbreviation for acetic acid , NaOAc for sodium acetate , and EtOAc for ethyl acetate . ref name Zum Zumdahl, S. S. Chemistry Heath ... in chemical formulas to indicate the acetate ion. This abbreviation is not to be confused with the symbol ... acetate might be abbreviated as NaAc , rather than CH sub 3 sub COONa . Care should also be taken ... name for acetate is ethanoate , but the IUPAC preferred name remains the common name, acetate. ref ... on Nomenclature of Organic Chemistry ref Salts The acetate anion , CH sub 3 sub COO sup &minus ... a pH of 5.5, acetic acid converts to acetate ref name Zum CH sub 3 sub COOH unicode CH sub 3 sub COO sup &minus sup H sup sup Many acetate salts are ionic, indicated by their tendency to dissolve well in water. A commonly encountered acetate in the home is sodium acetate , a white solid that can ... by acetate. Acetate is considered a relatively weak ligand in coordination chemistry because it can only form monodentate complexes. Examples of acetate complexes include chromium II acetate and basic ... more details
Acetate can refer to Acetate , a salt or ester of acetic acid Celluloseacetate , the acetate ester of celluloseAcetate disc , disc used in record production disambig it Acetato ... more details
Fibre sidebar Cellulose fibers are fibers from some plant or plant based materials. They are usually categorized as natural or manufactured . Natural Natural cellulose fibers are fibers that are still recognizable as being from a part of the original plant because they are only processed as much as needed to clean the fibers for use. For example, cotton fibers look like the soft fluffy cotton balls that they come from. Linen fibers look like the strong fiberous strands of the flax plant. All natural fibers go through a process where they are separated from the parts of the plant that are not used for the end product, usually through harvesting, separating from chaff, scouring, etc. Manufactured Manufactured cellulose fibers come from plants that are processed into a pulp paper wood and then extruded in the same ways that synthetic fibers like polyester or nylon are made. Rayon or viscose is one of the most common manufactured cellulose fibers, and it can be made from wood pulp. Textile In the textile industry regenerated cellulose is used as fiber s such as rayon , including modal textile modal , and the more recently developed Lyocell . Cellulose fibers are manufactured from dissolving pulp . Cellulose based fibers are of two types, regenerated or pure cellulose such as from the cupro ammonium process and modified cellulose such as the celluloseacetate s. The first artificial fiber, known as artificial silk , became known as viscose around 1894, and finally rayon in 1924. A similar product known as celluloseacetate was discovered in 1865. Rayon and acetate are both artificial fibers, but not truly synthetic, being made from wood . Although these artificial fibers were discovered in the mid nineteenth century, successful modern manufacture began much later. Environmental Issues What is often marketed as Bamboo fiber is actually not the fibers that grow in their natural ... existing forest habitats Category Cellulose Category Fibers Category Materials Category Textiles ... more details
Cellulose triacetate , also known simply as triacetate , CTA and TAC , is manufactured from cellulose and a source of acetate esters, typically acetic anhydride . Triacetate is typically used for the creation of fibres and film base . It is similar chemically to celluloseacetate , with the distinguishing ... the cellulose is completely acetylated whereas in regular celluloseacetate or cellulose diacetate , it is only partially acetylated. Triacetate is significantly more heat resistant than celluloseacetate. History Triacetate, whose chemical equation is C sub 6 sub H sub 7 sub O sub 2 sub OOCCH ... Triacetate is derived from cellulose by acetylating cellulose with acetic acid and or acetic anhydride . Acetylation converts hydroxyl groups in cellulose to acetyl group s, which renders the cellulose polymer much more soluble in organic solvents. The celluloseacetate is solution dissolved ... die cut Celluloseacetate film prone to degradation known as Vinegar syndrome Usage Scenarios ... may consist of a blend of celluloseacetate, diacetate and triacetate. See also Celluloseacetate ... of celluloseacetate fibres http texaswater.tamu.edu readings desal Membranetechnology.pdf Fundamentals of membranes for water treatment Chemweek s Business Daily 02Nov2010 Eastman to Boost Cellulose Triacetate Capacity at Kingsport Category Synthetic fibers Category Cellulose Category Acetate esters ar fa fr Triac tate de cellulose it Triacetato di cellulosa ...chembox verifiedrevid 476994099 ImageFile cellulose triacetate.png ImageSize 200px IUPACName OtherNames 2,3,6 Tri O acetyl cellulosecellulose triacetate polymer triacetylcellulose Section1 Chembox Identifiers ... and Eastman Chemical manufacture cellulose triacetate with Eastman announcing a 70 increase in output ... called S Finishing or surface saponification is sometimes applied to acetate and triacetate fabric s using ... leaving them with a cellulose coating. This reduces the tendency for the fibres to acquire ... more details
chembox Verifiedfields changed verifiedrevid 428875720 ImageFile Hydroxyethyl cellulose.png ImageSize 200px IUPACName OtherNames Cellulose, hydroxyethyl ether hydroxyethylcellulose 2 hydroxyethyl cellulose Section1 Chembox Identifiers CASNo Ref cascite correct CAS CASNo 9004 62 0 PubChem SMILES ChemSpiderID Ref chemspidercite changed chemspider ChemSpiderID NA Section2 Chembox Properties Formula variable MolarMass variable Appearance Density MeltingPt 140 C BoilingPt Solubility Section3 Chembox Hazards MainHazards ExternalMSDS http siri.org msds f2 chz chzvc.html MSDS FlashPt Autoignition Hydroxyethyl cellulose is a gelling and thickening agent derived from cellulose . It is widely used in cosmetics, cleaning solutions, and other household products. ref HPD 61 ref Hydroxyethyl cellulose and methyl cellulose are frequently used with hydrophobic drugs in capsule formulations, to improve the drugs dissolution in the gastrointestinal fluids. This process is known as Hydrophilization . References reflist Category Cellulose polymer stub el fa it Idrossietilcellulosa ja ... more details
Bacterial cellulose is an organic compound with the formula chem carbon C 6 hydrogen H 10 oxygen O 5 n produced from certain types of bacteria . While cellulose is a basic structural material of most plant ... Sarcina ventriculi and Agro bacterium. Bacterial, or microbial, cellulose has different properties from plant cellulose and is characterized by high purity, strength, moldability and increased water holding ability ref name Jonas R. Jonas, Luiz F. Farah, Production and application of microbial cellulose ... extracellular polysaccharides , such as cellulose, which form protective envelopes around the cells. While bacterial cellulose is produced in nature, many methods are currently being investigated to enhance cellulose growth from cultures in laboratories as a large scale process. By controlling synthesis methods, the resulting microbial cellulose can be tailored to have specific desirable properties. For example, attention has been given to the bacteria Acetobacter xylinum due to its cellulose ... science . Historically, bacterial cellulose has been limited to the manufacture of Nata de coco , an indigenous ... cellulose a masterpiece of nature s arts Journal of Materials Science, 2000 01 21, 261 270, vol 35, issue 2 ref With advances in the ability to synthesize and characterize bacterial cellulose, the material ... products, as well as medical applications. Many patents have been issued in microbial cellulose ... cellulose and utilize it in new areas ref name Jonas ref . Image Microbial cellulose pellicle.JPG right 350px thumb A wet microbial cellulose pellicle being removed from a culture. History As a material, cellulose was first discovered in 1838 by Anselme Payen. Payen was able to isolate the cellulose ... applications, cellulose from wood pulp was used to manufacture paper. It is ideal for displaying .... The discovery of cellulose produced by bacteria, specifically from the Acetobacter xylinum , was accredited ... that more intensive studies on bacterial cellulose were conducted. Several decades after the initial ... more details
structure of microbial cellulose Microbial cellulose is a form of cellulose that is produced by bacteria . It is widely used in the traditional Filipino dessert Nata de coco . Microbial cellulose was first confirmed as cellulose in 1886. ref S. Kuga and R. M. Brown, Silver labeling of the reducing ends of bacterial cellulose, Carbohydrate Research, vol. 180, no. 2, pp. 345 350, 1988. ref ... , Alacaligenes , Azotobacter , Pseudomonas , Rhizobium , and Sarcina genus Sarcina synthesize cellulose. ref name P. Ross, R. Mayer 1991 pp. 35 58 P. Ross, R. Mayer, and M. Benziman 1991 Cellulose biosynthesis ..., only the Acetobacter species produce enough cellulose to justify commercial interest. The most ... cellulose ribbons. Various kinds of sugars are used as substrate. Production occurs mostly at the interface of liquid and air. Differences with plant cellulose Some advantages of microbial cellulose over plant cellulose include Finer and more intricate structure No hemicellulose or lignin to be removed ... than plant cellulose Because of high price substrates sugars Low volumetric yields Lack of large scale ... cellulose pellicle.JPG right 270px thumb A wet microbial cellulose pellicle being removed from a culture. Functions One continuing mystery surrounding microbial cellulose is its exact biological ... form of microbial cellulose is that of a pellicle on the top of a static cultured growth media. It has, thus, been hypothesized that cellulose acts as a floatation device, bringing the bacteria to the oxygen ... on submerged oxygen permeable silicone tubes that show that cellulose grows well submerged if enough oxygen is present. ref T. Yoshino, T. Asakura, and K. Toda, Cellulose production by Acetobacter ..., pp. 32 36, 1996. ref Others suspect that cellulose is used to immobilize the bacteria in an attempt ... and R. Cannon, Alternative Environmental Roles for Cellulose Produced by Acetobacter xylinum, Applied Environmental Microbiology, vol. 55, pp. 2448 2452, Oct. 1989. ref Uses Medical Microbial cellulose ... more details
File Ecovata.jpg thumb Cellulose insulation in bulk The word cellulose comes from the French word for a living ... climate and sounds. Cellulose insulation is plant fiber used in wall and roof cavities to separate the inside and outside of the building thermally and acoustically. History of cellulose insulation Cellulose is the oldest Building insulation materials building insulation material citation needed ..., cotton, straw, sawdust, hemp and corncob. Monticello was insulated with a form of cellulose. Modern cellulose insulation, made with recycled newspaper using grinding and dust removing machines and adding ... was given for homeowners who installed insulation. While in 1976 there were roughly 100 cellulose ... sup 1 sup citation is from Home Insulation Hearings 1978 . Cellulose insulation was produced locally ... retardant, cellulose captured an increased share of the market due to lower costs and its suitability ... standards beginning in 1978. There was a great concern that the growth in cellulose manufactures ... for cellulose insulation only settled density, corrosiveness, critical radiant flux and smoldering ... of regulations by the CPSC put most of the small producers of cellulose insulation out of business. The costs incurred by increasing fire testing made cellulose more expensive and the bad publicity ... further studies. By 1991 only 61 cellulose producers still remained in the US. ref Cellulose Insulation ... centralized fiberglass and mineral insulation manufacturers helped pass the tough fire standards for cellulose ... Association that promoted fire hazard claims against cellulose insulation. These claims were not independently ... date December 2007 . Currently cellulose insulation has increased again in use in the United States. Part of the reason for this growth are studies that suggest that cellulose may actually protect a building from damage in a fire better than fiberglass because cellulose is denser than fiberglass ... reason for the comeback of cellulose might be because of the increased interest in green building . Cellulose ... more details
chembox Verifiedfields changed verifiedrevid 428800398 ImageFile Ethyl cellulose.png ImageSize 200px IUPACName OtherNames Cellulose, ethyl ether ethylated cellulose ethylcellulose E462 Section1 Chembox Identifiers CASNo Ref cascite correct CAS CASNo 9004 57 3 PubChem ChemSpiderID Ref chemspidercite changed chemspider ChemSpiderID NA SMILES Section2 Chembox Properties Formula variable MolarMass variable Appearance Density MeltingPt BoilingPt Solubility Section3 Chembox Hazards MainHazards FlashPt Autoignition Ethyl cellulose is a derivative of cellulose in which some of the hydroxyl group s on the repeating glucose units are converted into ethyl group ethyl ether groups. The number of ethyl groups can vary depending on the manufacturer. It is mainly used as a thin film coating material. ref http www.ronasgroup.com ethyl cellulose.asp Ethyl cellulose Cleanup link rot date March 2012 ref Ethyl cellulose is used as a food additive as an emulsifier E462 . References reflist Category Cellulose Category Food additives Category Excipients polymer stub bs Etil celuloza cs Ethylcelul za de Ethylcellulose fa ru fi Etyyliselluloosa ... more details
chembox verifiedrevid 476994062 ImageFile Methyl cellulose.png ImageSize 200px IUPACName OtherNames Cellulose, methyl ether methylated cellulose methylcellulose E461 Section1 Chembox Identifiers CASNo ... MainHazards FlashPt Autoignition Methyl cellulose or methylcellulose is a chemical compound derived from cellulose . It is a hydrophile hydrophilic white powder in pure form and dissolves in cold but not in hot ... of constipation . Like cellulose, it is not digestible, not toxic, and not an allergen . Chemistry Methyl cellulose does not occur naturally and is synthetically produced by heating cellulose with caustic ... OCH sub 3 sub groups . Different kinds of methyl cellulose can be prepared depending on the number of hydroxyl groups substituted. Cellulose is a polymer consisting of numerous linked glucose molecules ... of methyl cellulose is defined as the average number of substituted hydroxyl groups per glucose. The theoretical ... cellulose preparations can also differ in the average length of their polymer backbones. Solubility and temperature Methyl cellulose has a lower critical solution temperature LCST between 40 C and 50 ..., which has a paradoxical effect that heating a saturated solution of methyl cellulose will turn it solid, because methyl cellulose will precipitation chemistry precipitate out. The temperature ... a solution of methyl cellulose with cold water is difficult however as the powder comes into contact ... the powder with hot water, so that the methyl cellulose particles are well dispersed in the water ... cellulose has an extremely wide range of uses, of which several are described below. Consumer products Thickener and emulsifier Methyl cellulose is often added to Shampoo hair shampoo s, tooth paste ..., for example ice cream or croquette . Methyl cellulose is also an important emulsifier , preventing the separation of two mixed liquids. The E number of methyl cellulose as food additive is E461. Methyl cellulose AKS Methocel produced by Dow Chemical is also used as paint rheological modifier to prevent ... more details
cellulose CMC or cellulose gum ref cite web url http www.codexalimentarius.net gsfaonline additives details.html?id 51 title Sodium carboxymethyl celluloseCellulose gum year 2009 work Codex Alimentarius ref is a cellulose derivatization derivative with carboxymethyl groups CH sub 2 sub COOH bound to some of the hydroxyl groups of the glucose glucopyranose monomer s that make up the cellulose polymer backbone . It is often used as its sodium salt chemistry salt , sodium carboxymethyl cellulose ... reaction of cellulose with chloroacetic acid . The polar molecule polar organic acid carboxyl group s render the cellulose soluble and chemically reactive. The functional properties of CMC depend on the degree of substitution chemistry substitution of the cellulose structure i.e., how many of the hydroxyl groups have taken part in the substitution reaction , as well as the chain length of the cellulose ... in non Volatility chemistry volatile eye drop s artificial tears . Sometimes it is methyl cellulose ... reactivity to the base cellulose. Following the initial reaction the resultant mixture produces ... agent. Poly anionic cellulose or PAC is derived from CMC and is also used in oilfield practice. Insoluble microgranular carboxymethyl cellulose is used as a cation exchange resin in ion exchange chromatography ... properties of microgranular cellulose are retained while adding sufficient negative charged carboxylate ... engineered to decrystallize cellulose and create amorphous sites that are ideal for endglucanase action ... whole cellulase activity with CMC hydrolysis. As the mechanism of cellulose depolymerization has ... e.g. Avicel and not soluble e.g. CMC cellulose. See also Hydroxypropyl cellulose Methyl cellulose Croscarmellose sodium References reflist External links http www.lsbu.ac.uk water hycmc.html ... commercial preparations and various uses, including paper conservation bibliography Category Cellulose ... more details
enzyme Name Cellulose polysulfatase EC number 3.1.6.7 CAS number 9025 58 5 IUBMB EC number 3 1 6 7 GO code image width caption In enzymology , a cellulose polysulfatase EC number 3.1.6.7 is an enzyme that catalysis catalyzes the chemical reaction of cleaving off the 2 and 3 sulfate groups of the polysulfates of cellulose and charonin . This enzyme belongs to the family of hydrolase s, specifically those acting on sulfuric ester bonds. The systematic name of this enzyme class is cellulose sulfate sulfohydrolase . References reflist 1 cite journal author Takahashi N and Egami F date 1961 title Hydrolysis of polysaccharide sulphate esters by a sulphatase preparation from Charonia lampas journal Biochem. J. volume 80 pages 384&ndash 386 pmid 13774882 pmc 1244012 issue 2 hydrolase stub Category EC 3.1.6 Category Enzymes of unknown structure ... more details
. C. Horsman, K. M. Landers, J. P., Hydroxypropyl cellulose as an adsorptive coating sieving matrix for DNA ... date accessdate 2011 11 10 ref See also Carboxymethyl cellulose Methyl cellulose Notes and references reflist DEFAULTSORT Hydroxypropyl Cellulose Category Excipients Category Food additives Category Cellulose fa hu Hidroxipropil cellul z ... more details
Microcrystalline cellulose is a term for refined wood pulp and is used as a texturizer, an anti caking agent , a fat substitute , an emulsifier , an extender, and a bulking agent in food production . ref http www.ams.usda.gov AMSv1.0 getfile?dDocName STELPRDC5066975 ref The most common form is used in vitamin supplements or tablets. It is also used in Virus quantification Plaque assay plaque assays for counting viruses, as an alternative to carboxymethylcellulose . ref Cite journal last Matrosovich first Mikhail authorlink coauthors Tatyana Matrosovich, Wolfgang Garten, and Hans Dieter Klenk title New low viscosity overlay medium for viral plaque assays journal Virology Journal volume 3 issue pages 63 publisher BioMed Central location year 2006 pmc 1564390 jstor issn doi 10.1186 1743 422X 3 63 PMID 16945126 mr zbl jfm pmid 16945126 ref In many ways, Cellulose makes the ideal excipient. A naturally occurring polymer, it is composed of glucose units connected by a 1 4 beta glycosidic bond. These linear cellulose chains are bundled together as microfibril spiralled together in the walls of plant cell. Each microfibril exhibits a high degree of three dimensional internal bonding resulting in a crystalline structure that is insoluble in water and resistant to reagents. There are, however, relatively weak segments of the microfibril with weaker internal bonding. These are called amorphous regions but are more accurately called dislocations since microfibril containing single phase structure. The crystalline region is isolated to produce Microcrystalline Cellulose. References Reflist Category Cellulose organic compound stub material stub hu Mikrokrist lyos cellul z pl Celuloza mikrokrystaliczna ... more details
Drugbox Verifiedfields changed verifiedrevid 451160223 IUPAC name image Clinical data tradename pregnancy AU A B1 B2 B3 C D X pregnancy US A B C D X pregnancy category legal AU S2, S3, S4, S5, S6, S7, S8, S9 or Unscheduled legal CA Schedule I, II, III, IV, V, VI, VII, VIII legal UK GSL, P, POM, CD, or Class A, B, C legal US OTC Rx only Schedule I, II, III, IV, V legal status routes of administration Pharmacokinetic data bioavailability protein bound metabolism elimination half life excretion Identifiers ChemSpiderID Ref chemspidercite changed chemspider ChemSpiderID NA CAS number Ref cascite correct ?? CAS number ATC prefix B02 ATC suffix BC02 PubChem DrugBank Ref drugbankcite correct drugbank DrugBank Chemical data chemical formula molecular weight Oxidized cellulose is a water insoluble derivative of cellulose . It can be produced from cellulose by the action of an oxidizing agent, such as chlorine , hydrogen peroxide , peracetic acid , chlorine dioxide , nitrogen dioxide , persulfate s, permanganate , dichromate sulfuric acid, hypochlorous acid , hypohalite s or periodate s and a variety of metal catalysts. ref name collinson catox cite journal last Collinson first Simon coauthors Thielemans, Wim title The catalytic oxidation of biomass to new materials focusing on starch, cellulose and lignin journal Coordination Chemistry Reviews year 2010 volume 254 issue 15 16 pages 1854 1870 doi 10.1016 j.ccr.2010.04.007 ref Oxidized cellulose may contain carboxylic acid , aldehyde , and or ketone groups, in addition to the original hydroxyl groups of the starting material, cellulose, depending on the nature of the oxidant and reaction conditions. ref http www.freepatentsonline.com 5780618.html ref It is an antihemorrhagic . ref name pmid10350276 cite journal author Oto A, Remer EM, O Malley CM, Tkach JA, Gill IS title MR characteristics of oxidized cellulose Surgicel journal AJR Am J Roentgenol volume 172 issue 6 pages 1481 4 year 1999 month June pmid 10350276 doi url http ... more details
Image Diethylaminoethylcellulose.png thumb right 300px Schematic structure of DEAE C positively charged diethylaminoethanol groups can bind negative ions Diethylaminoethyl cellulose DEAE C is a positively charged resin used in ion exchange chromatography , a type of column chromatography , used in protein and nucleic acid purification separation. Gel matrix beads are derivatized with diethylaminoethanol DEAE and lock negatively charged proteins or nucleic acids into the matrix, until released by increasing the salt concentration of the solvent. DE52 has a Acid dissociation constant pKa of 11.5. DEAE Dextran DEAE D is also used for Transfection transfecting animal cells with foreign DNA. It is added to solution containing DNA meant for transfection. It binds and interacts with negatively charged DNA molecules and via a largely unknown mechanism brings about the uptake of nucleic acid s by the cell. This procedure is highly suited for transient transfection used for various molecular biology studies. Sources unreferenced date December 2011 reflist Category Cellulose polymer stub de Diethylaminoethylcellulose fr Diethylaminoethyl ko ... more details
lead rewrite date July 2010 The coating of these electrode s contains organic materials that turn into gas es in the arc. About 30 of the coating weight is cellulose . In some countries, paper pulp and wood powder are added to the coating in certain ratios to reduce the amount of pure cellulose. These organic compounds in the coating decompose in the arc to from carbon monoxide , carbon dioxide and hydrogen , which increase the arc tension and thus, the welding arc becomes stronger and harder. Compared with other types of electrodes, with the same current values, a 70 deeper penetration is obtained with cellulosic electrodes. This type of electrode is generally produced with thin or medium coating thicknesses. When the coating is thin, a light amount of slag is formed on the welding beam and the spatter loss is high. On the other hand, the gap filling and vertical down welding capability as well as penetration of the weld obtained by this electrode is good. Since this electrode can be used in every position particularly in vertical down , it has a wide range of applications in the ship building industry and in the welding of pipeline transport pipeline s with a wall thickness of less than 12.5 mm. The cellulose that burns during welding forms a very good protective gaseous atmosphere. Application The main features of cellulosic electrodes are as follows Deep penetrating welding in every position, Vertical down welding capability, Weld metal with good mechanical properties. The titanium compounds in the coating provide arc stability as well as help clean the slag easily. Adding a certain amount of ferromanganese to the coating makes it possible to compensate for the manganese that is lost through oxidation during welding and to deoxidize the weld pool. Since these electrodes are generally manufactured using a sodium silicate binder, they can best be used with DC . References http www.arctech.com.tr english cellulosic electrodes.htm www.arctech.com.tr Category Electro ... more details
chembox verifiedrevid 442346934 Name Isopropyl acetate ImageFile Isopropyl acetate.svg ImageSize 200px ImageName Isopropyl acetate IUPACName 1 Methylethyl acetate OtherNames Isopropyl acetate br 1 methylethyl ester br 2 acetoxypropane br 2 propyl acetate br methylethyl ethanoate Section1 Chembox Identifiers CASNo Ref cascite correct CAS CASNo 108 21 4 SMILES CC OC C C O Section2 Chembox Properties C 5 H 10 O 2 Density 0.87 g cm sup 3 sup Solubility 4.3 g 100 mL 27 C MeltingPtC 73 BoilingPtC 89 Section7 Chembox Hazards NFPA H 1 NFPA F 3 NFPA R FlashPt 2 C Autoignition 460 C ExploLimits 1.8&ndash 7.8 Isopropyl acetate is an ester , an organic compound which is the product of esterification of acetic acid and isopropanol . It is a clear, colorless liquid with a characteristic fruity odor. ref name IP cite web publisher ChemViP title Isopropyl acetate url http www.chemvip.com index products index all products all products solvents product isopropyl acetate.htm ref Isopropyl acetate is a solvent with a wide variety of manufacturing uses that is miscible with most other organic solvents, and moderately soluble in water. It is used as a solvent for cellulose , plastic s, oil and fat s. It is a component of some printing ink s ref name IP http www.chemvip.com index products index all products all products solvents product isopropyl acetate.htm ref and perfume s. Isopropyl acetate decomposes slowly on contact with steel when exposed to air producing acetic acid and isopropanol. It reacts violently with oxidizing materials and it attacks many plastics. ref name ICSC cite web publisher International Chemical Safety Cards title ISOPROPYL ACETATE url http actrav.itcilo.org actrav english telearn osh ic 108214.htm ref Isopropyl acetate is quite flammable in both its liquid and vapor forms ... Data Sheets title Iso propyl Acetate url http hazard.com msds mf baker baker files p6753.htm ref References reflist Category Flavors Category Ester solvents Category Acetate esters de Essigs ureisopropylester ... more details
pages 253 257 doi 10.1023 A 1021932131526 pmid 12647866 issue 1 ref Benzyl acetate is also used as a solvent in plastics and resin, celluloseacetate, nitrate, oils, lacquers, polishes and inks. Fact ...chembox verifiedrevid 444620045 ImageFile Benzyl acetate structure.svg ImageFile2 Benzyl acetate.gif IUPACName Benzyl acetate Section1 Chembox Identifiers ChEBI Ref ebicite correct EBI ChEBI 52051 SMILES c1ccccc1COC O C UNII Ref fdacite correct FDA UNII 0ECG3V79ZJ KEGG Ref keggcite correct kegg KEGG C15513 InChI 1 C9H10O2 c1 8 10 11 7 9 5 3 2 4 6 9 h2 6H,7H2,1H3 InChIKey QUKGYYKBILRGFE UHFFFAOYAD SMILES1 CC O OCc1ccccc1 StdInChI Ref stdinchicite correct chemspider StdInChI 1S C9H10O2 c1 8 10 11 7 9 5 3 2 4 6 9 h2 6H,7H2,1H3 StdInChIKey Ref stdinchicite correct chemspider StdInChIKey QUKGYYKBILRGFE UHFFFAOYSA N CASNo Ref cascite correct CAS CASNo 140 11 4 ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 13850405 Section2 Chembox Properties Formula C sub 6 sub H sub 5 sub CH sub 2 sub OCOCH sub 3 sub MolarMass 150.18 g mol Density 1.054 g ml MeltingPtC &minus 51 BoilingPtC 212 NFPA F 0 NFPA H 0 NFPA R 0 NFPA O 0 Benzyl acetate is an organic compound with the molecular formula C sub 9 sub H sub 10 sub O sub 2 sub . It is the ester formed by condensation of benzyl alcohol and acetic acid . Benzyl acetate is found naturally in many flowers. It is the primary constituent of the essential oil s from the flowers jasmine , ylang ylang and tobira . It has pleasant sweet aroma reminiscent of jasmine. Consequently, it is used widely in perfumery and cosmetics for its aroma and in flavorings to impart apple and pear flavors. ref http www.thegoodscentscompany.com data rw1001611.html ref It is one of many compounds that is attractive to males of various species of orchid bee ... acetate. Category Perfume ingredients Category Flavors Category Insect pheromones Category IARC Group 3 carcinogens Category Acetate esters de Benzylacetat fa fr Ac tate de benzyle id Benzil ... more details
Iron acetate can refer to Ferric acetate iron III acetate , Fe CH sub 3 sub COO sub 3 sub Iron II acetate Ferrous acetate iron II acetate , Fe CH sub 3 sub COO sub 2 sub disambig ar nl IJzeracetaat ... more details
Manganese acetate can refer to Manganese II acetate Manganese III acetate disambig Short pages monitor This long comment was added to the page to prevent it being listed on Special Shortpages. It and the accompanying monitoring template were generated via Template Longcomment. Please do not remove the monitor template without removing the comment as well. zh ... more details
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