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Showing 1 to 20 of 83 for “"(ACID) HYDROLYSIS"”.

  1. Production of Ethanol from Cereal Food Fines using Dilute-Acid Hydrolysis

    Arnett, Andrew Edward2017

    … has to be broken down in to simple sugars using hydrolysis. One method of hydrolysis is called dilute-acid hydrolysis, whereby low concentrations of acid are added to the feedstock to facilitate the breaking of chemical bonds. This study investigates the effect of different concentrations of acid …

    arkansas Repository record

  2. Kinetic characterization for pretreatment of timber varieties and switchgrass using diluted acid hydrolysis

    Yat, Shu Chiang

    mtu Repository record

  3. Effects of acid hydrolysis conditions on cellulose nanocrystal yield and properties: A response surface methodology study

    Dong, ShupingVirginia Tech2014

    … (CNCs) are frequently prepared by sulfuric acid hydrolysis of a purified cellulose starting material. CNC yields, however, are generally low, often below 20%. This study employs response surface methodology to optimize the hydrolysis conditions for maximum CNC yield. Two experimental designs …

    vt Repository record

  4. The effect of ultrasonic irradiation on the specific reaction rate constant in the acid hydrolysis of ethyl acetate

    Gray, Walter C.Virginia Polytechnic Institute1952

    … irradiation on the specific reaction rate of the hydrolysis of an aqueous solution of ethyl acetate in the presence of hydrochloric acid as the catalyst. The commercially obtained ultrasonic generator was limited to four frequencies - namely, 400, 700, 1000, and 1500 kilocycles. Two thousand volts …

    vt Repository record

  5. ΜΕΛΕΤΗ ΠΡΟΚΑΤΕΡΓΑΣΙΩΝ ΓΙΑ ΤΗ ΒΕΛΤΙΩΣΗ ΤΗΣ ΟΞΙΝΗΣ ΥΔΡΟΛΥΣΗΣ ΚΥΤΤΑΡΙΝΟΥΧΩΝ ΥΛΙΚΩΝ

    Σιδηράς, ΔημήτριοςΕθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)1990

    IN THE PRESENT THESIS A STUDY OF THE ACID HYDROLYSIS OF PRETREATED AS WELL AS NOT PRETREATED CELLULOSIC MATERIALS TOOK PLACE, WITH DEVELOPMENT AND PROOF OF A NEW MODEL OF ACID HYDROLYSIS AND THE USE OF IT FOR THE EVALUATION OF PHYSICAL AND CHEMICAL PRETREATMENTS FOR THE IMPROVEMENT OF AND …

    greece Repository record

  6. Structural studies of the capsular polysaccharides from some strains of Klebsiella and Cryptococcus neoformans micro-organisms

    Merrifield, Edwin HowardDepartment of Chemistry1978

    … oligosaccharide units containing -glucuronic acid and three to five hexose residues, with pyruvic acid ketal and 0-acetyl groups also present in some of the polysaccharides. Graded acid hydrolysis, monitored by gel-permeation chromato graphy, has been used to study the degradation of each …

    cape-town Repository record

  7. Analytical studies on diazepam

    Barbour, Carol J.University of Strathclyde1987

    … and to investigate the reaction kinetics of the acid hydrolysis of diazepam. From analysis of both fresh and stored samples of formulations, it was seen that solid dosage forms showed no degradation, but degradation products were detected in liquid formulations. Advantages and disadvantages were …

    strathclyde Repository record

  8. The kinetics of successive aquation reactions of tetraamminepalladium (II) ion

    DeBerry, William Jennings, Jr.Monterey, CA; Naval Postgraduate School1971

    … were made up and analyzed. The following acid hydrolysis reactions of tetraamminepalladium (II) ion were studied by ultraviolet spectroscopy. First order rate constants were evaluated for each step of the reaction series at various temperatures. Activation parameters were determined. …

    nps Repository record

  9. Steroidal saponins and sapogenins from Agapanthus praecox Willd

    Mathew, George Ernest AlbertDepartment of Chemistry1970

    … of Agapanthus praecox Willd., yielded, on acid hydrolysis, the steroidal sapogenin agspanthagenin and galactose and rhamnose in the molecular ratio of 3:l. The structure assigned to agapanthagenin has been confirmed oh the basis of further synthetic and spectroscopic evidence. The structure …

    cape-town Repository record

  10. Two-stage acidic-alkaline pretreatment of Miscanthus for bioethanol production

    Guo, BinUniversity of Illinois at Urbana-Champaign2013

    … alteration and ethanol yield. A two-stage acidic-alkaline pretreatment was proposed to obtain most intact monosaccharides from cellulose and hemicellulose. Dilute sulfuric acid pretreatment was performed in the first stage mainly for hemicellulose removal while the second stage carried out …

    uiuc Repository record

  11. Structural investigations of the polysaccharide gum exudates from Brabeiurn Stellatifoliurn and Grevillea Robusta

    Van der Bijl, PieterDepartment of Chemistry1971

    … analysis, Smith-degradation and partial acid hydrolysis revealed small differences in fine structure. Brabeium stellatifolium gum was examined in somewhat more detail. In a study of hydrolysis of the gum by acid the degradation process was followed by gel chromatography. The elution …

    cape-town Repository record

  12. Nitrations of viscose rayon

    Allen, Ralph WilsonVirginia Agricultural and Mechanical College and Polytechnic Institute1942

    … stability tests indicate that the same type of acid hydrolysis of the glucose linkages occurs giving unstable, short-chain nitrates whenever rapid, harsh esterification is undertaken. This instability naturally prohibits use of such products as smokeless powder. From the results of this …

    vt Repository record

  13. Part I. Metabolites From the Pohnpei Sponge Stylissa Massa. Part II. Identification of Illudin S as the Sole Antiviral Compound in the Fruiting Bodies of Omphalotus Illudens. Part III. Structure Elucidation of Oscillacidins a and B From a Homer Lake Oscillatoria Sp

    Lehmann, Virginia Katherine BowdenUniversity of Illinois at Urbana-Champaign2015

    … two new nonmicrocystin peptides, oscillacidins A and B, were isolated which contain the rare beta-amino acid 3-amino-2,5,7,8-tetrahydroxy-10-methylundecanoic acid (Aound). In efforts to support the proposed structure of these two new peptides, the two unusual amino acids, N-Ac-N-McLeu …

    uiuc Repository record

  14. The optical resolution of albuterol

    Stevens, Anne TheresaDepartment of Chemistry1998

    … in cocrystallisation experiments with several acidic resolving agents~ Successful resolution of the acetonide was achieved with both di-0-benzoyl- and di-0-toluoyltartaric acid, with the (2S,3S)enantiomer of the acid selectively co-crystallising with the desired (R)-albuterol acetonide. High …

    cape-town Repository record

  15. Replacement of homogeneous acids in the conversion of meta-phenylenediamine to resorcinol by Heterogeneous Analogues

    Brack, BryanDepartment of Chemical Engineering2001

    … and is hydrogenated quite easily, the acid hydrolysis of MPDA to resorcinol will be considered during this investigation.

    cape-town Repository record

  16. Forward genetic analysis of cellulose biosynthesis inhibitor resistance and wall hydrolysis sensitivity.

    Shim, IsaacUniversity of Ontario Institute of Technology2014

    … flupoxam (fxr) were attributed to single amino acid substitutions in primary wall CESAs. Twelve novel resistance alleles were isolated and no cross-resistance was observed. Point mutations were mostly clustered around the C-terminal regions of CESA1 and CESA3, and CESA3 and CESA6 for fxr and ixr …

    uoit Repository record

  17. Studies in coordination chemistry

    Miller, Warren Victor

    … Part II, the present state of knowledge on the acid hydrolysis reactions of Cr(III) and Co(III) halo-amine complexes is reviewed. In Section B a kinetic study of the acid hydrolysis of bromoaquo (triaminotriethylamine) cobalt(III) ion is reported and the data compared with that of other Cr(III) …

    binghamton Repository record

  18. Methionine: oxidation state in processed foods and enzyme-catalyzed reaction with adenosine triphosphate

    Todd, Jeanne MarieVirginia Polytechnic Institute and State University1980

    Two conditions of alkaline hydrolysis of proteins, (1) 2M NaOH, 18 hours, 100°C and (2) 3M NaOH, 16 hours 110°C, prior to ion-exchange chromatography were tested on free amino acids and model protein systems to determine the better set of conditions for measurement of methionine sulfoxide in food …

    vt Repository record

  19. Studies on the Biosynthesis of Protochlorophyllide Ester in Etiolated and Green Tissues of Higher Plants

    Mccarthy, Susan ArleneUniversity of Illinois at Urbana-Champaign2015

    … and (delta)-aminolevulinic acid (ALA) accumulated a pigment which had the spectroscopic properties of Mg-protoporphyrin monomethyl ether (MPE) but physical properties similar to those of protochlorophyllide (Pchlide) ester. When this compound was subjected to demetallation …

    uiuc Repository record

  20. Desenvolvimento de método indicativo de estabilidade para detecção de produtos de degradação da associação de zidovudina e lamivudina (300 + 150 mg) em matéria-prima e comprimidos.

    Araújo, José Izak Ribeiro deUniversidade Federal da Paraíba2015

    … associated through stress tests in alkaline, acidic, neutral and oxidative. The results were analyzed based on the interpretation of the chromatograms generated by High Efficiency Liquid Chr omatography (HPLC) with diode array detector (DAD). Zidovudine was stable in the less concentrated (0.1 …

    brazil-ufpb Repository record

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