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48 3-1-4. Reactions Using Mutant FSA A129S Another Mutant Enzyme
Results _ 3-1-4. Reactions using mutant FSA A129S Another mutant enzyme, A129S, which has serine at 129th residue instead of alanine (Fig.3-11a), has high potential to catalyze the reactions using DHA as a donor substrate. Virtually, the kcat/Km value for DHA is more than 12 fold of that of WT (Schürmann, 2001). This implies that larger amounts of products can be acquired with A129S than with WT, or unfavorable reactions with WT may be accomplished with the mutant enzyme. Firstly, FSA A129S was produced in DH5α with pUC18 plasmid vector and purified with same method as WT was done (Fig.3-11b, Table 3-8). This mutant enzyme was overexpressed well and a strong band corresponding to FSA was seen on SDS-PAGE gel (as 10~15% of total protein in crude extract). In addition, this mutant enzyme held the stability against high temperature. Thus, a heat treatment step was part of the purification protocol. However, protein solution obtained from hydroxyapatite column of the final purification step showed still a few extra protein bands on SDS-PAGE gel (Fig.3-11b). Although it contained those extra proteins, the purity appeared to be more than 90% on the gel and the specific activity was quite high enough to assay the catalytic ability of the enzyme for several substrates. Indeed, even crude extract showed higher specific activity than purified WT had (Table 3-8). Three reactions (scheme 3-1) were probed to assay catalytic ability of both FSA WT and A129S. Dihydroxyacetone (DHA) or hydroxyacetone (HA) were used as donor substrates, and formaldehyde or glycolaldehyde as acceptor. -
Proquest Dissertations
Feeding and oviposition behavior of tobacco hornworms, Manduca sexta, in relation to Myo-inositol Item Type text; Thesis-Reproduction (electronic) Authors Nelson, Nancy Marie, 1968- Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 07/10/2021 15:39:03 Link to Item http://hdl.handle.net/10150/278543 INFORMATION TO USERS This manuscript has been reproduced from the microfilm master. UMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer. The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction. In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion. Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand comer and continuing from left to right in equal sections with small overlaps. Each original is also photographed in one exposure and is included in reduced form at the back of the book. -
Assessment of DHA in Self-Tanning Creams Applied in Spray Booths
Assessment of DHA in self-tanning creams applied in spray booths Lena Höglund MSc. DTC (Danish Toxicology Centre): Betty Bügel Mogensen Rossana Bossi Marianne Glasius National Environmental Research Institute of Denmark Survey of Chemical Substances in Consumer Products, No. 72 2006 The Danish Environmental Protection Agency will, when opportunity offers, publish reports and contributions relating to environmental research and development projects financed via the Danish EPA. Please note that publication does not signify that the contents of the reports necessarily reflect the views of the Danish EPA. The reports are, however, published because the Danish EPA finds that the studies represent a valuable contribution to the debate on environmental policy in Denmark. Contents SUMMARY AND CONCLUSIONS 5 1 INTRODUCTION 7 2 OBJECTIVES 10 3 TECHNIQUES 12 3.1 DESCRIPTION OF TECHNIQUES 12 3.1.1 Manual turbine spray 12 3.1.2 Third-generation booths (closed booths) 13 3.1.3 Fourth-generation booths (open booths) 15 3.2 SAFETY INSTRUCTIONS 16 3.2.1 General remarks on enterprises' safety instructions 16 3.2.2 Safety instructions from the authorities 16 3.2.3 Advice for customers from personnel 16 4 SUBSTANCES CONTAINED IN PRODUCTS 20 5 HEALTH ASSESSMENT 22 5.1 TOXOCOLOGICAL PROFILE OF DIHYDROXYACETONE (DHA) (CAS NO. 96-26-4) 22 5.2 BRIEF HEALTH ASSESSMENT OF ETHOXYDIGLYCOL (CAS NO. 111-90-0) 26 5.3 BRIEF HEALTH ASSESSMENT OF PHENOXYETHANOL (CAS NO.122-99-6) 27 5.4 BRIEF HEALTH ASSESSMENT OF GLYCERINE (CAS NO. 56-81-5) 27 5.5 BRIEF HEALTH ASSESSMENT OF POLYSORBATES AND SORBITAN ESTERS 27 5.6 BRIEF HEALTH ASSESSMENT OF ERYTHRULOSE (CAS NO. -
Unit 1: Carbohydrates Structure and Biological Importance: Monosaccharides, Disaccharides, Polysaccharides and Glycoconjugates
CBCS 3rd Semester Core Course VII Paper: Fundamentals of Biochemistry Unit 1: Carbohydrates Structure and Biological importance: Monosaccharides, Disaccharides, Polysaccharides and Glycoconjugates By- Dr. Luna Phukan Definition The carbohydrates are a group of naturally occurring carbonyl compounds (aldehydes or ketones) that also contain several hydroxyl groups. It may also include their derivatives which produce such compounds on hydrolysis. They are the most abundant organic molecules in nature and also referred to as “saccharides”. The carbohydrates which are soluble in water and sweet in taste are called as “sugars”. Structure of Carbohydrates Carbohydrates consist of carbon, hydrogen, and oxygen. The general empirical structure for carbohydrates is (CH2O)n. They are organic compounds organized in the form of aldehydes or ketones with multiple hydroxyl groups coming off the carbon chain. The building blocks of all carbohydrates are simple sugars called monosaccharides. A monosaccharide can be a polyhydroxy aldehyde (aldose) or a polyhydroxy ketone (ketose) The carbohydrates can be structurally represented in any of the three forms: 1. Open chain structure. 2. Hemi-acetal structure. 3. Haworth structure. Open chain structure – It is the long straight-chain form of carbohydrates. Hemi-acetal structure – Here the 1st carbon of the glucose condenses with the -OH group of the 5th carbon to form a ring structure. Haworth structure – It is the presence of the pyranose ring structure Classification of Carbohydrates Monosaccharides The simple carbohydrates include single sugars (monosaccharides) and polymers, oligosaccharides, and polysaccharides. Simplest group of carbohydrates and often called simple sugars since they cannot be further hydrolyzed. Colorless, crystalline solid which are soluble in water and insoluble in a non-polar solvent. -
Monosaccharide Disaccharide Oligosaccharide Polysaccharide Monosaccharide
Carbohydrates Classification of Carbohydrates monosaccharide disaccharide oligosaccharide polysaccharide Monosaccharide is not cleaved to a simpler carbohydrate on hydrolysis glucose, for example, is a monosaccharide Disaccharide is cleaved to two monosaccharides on hydrolysis these two monosaccharides may be the same or different C12H22O11 + H2O C6H12O6 + C6H12O6 glucose sucrose (a monosaccharide) fructose (a disaccharide) (a monosaccharide) Higher Saccharides oligosaccharide: gives two or more monosaccharide units on hydrolysis is homogeneous—all molecules of a particular oligosaccharide are the same, including chain length polysaccharide: yields "many" monosaccharide units on hydrolysis mixtures of the same polysaccharide differing only in chain length Some Classes of Carbohydrates No. of carbons Aldose Ketose 4 Aldotetrose Ketotetrose 5 Aldopentose Ketopentose 6 Aldohexose Ketopentose 7 Aldoheptose Ketoheptose 8 Aldooctose Ketooctose Fischer Projections and D-L Notation Fischer Projections Fischer Projections Fischer Projections of Enantiomers Enantiomers of Glyceraldehyde CH O CH O H OH HO H D L CH2OH CH2OH (+)-Glyceraldehyde (–)-Glyceraldehyde The Aldotetroses An Aldotetrose 1 CH O 2 H OH 3 H OH D 4 CH2OH stereochemistry assigned on basis of whether configuration of highest-numbered stereogenic center is analogous to D or L-glyceraldehyde An Aldotetrose 1 CH O 2 H OH 3 H OH 4 CH2OH D-Erythrose The Four Aldotetroses CH O CH O H OH HO H D-Erythrose and L-erythrose are H OH HO H enantiomers CH2OH CH2OH D-Erythrose L-Erythrose The Four -
Collagen-Based Matrix Matrix Auf Der Basis Von Kollagen Matrice À Base De Collagène
Europäisches Patentamt *EP000693523B1* (19) European Patent Office Office européen des brevets (11) EP 0 693 523 B1 (12) EUROPEAN PATENT SPECIFICATION (45) Date of publication and mention (51) Int Cl.7: C08H 1/06, A61L 27/00, of the grant of the patent: A61L 31/00 20.11.2002 Bulletin 2002/47 (21) Application number: 95111260.6 (22) Date of filing: 18.07.1995 (54) Collagen-based matrix Matrix auf der Basis von Kollagen Matrice à base de collagène (84) Designated Contracting States: • Noff, Matityahu AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL Rehovot 76228 (IL) PT SE (74) Representative: Grünecker, Kinkeldey, (30) Priority: 19.07.1994 IL 11036794 Stockmair & Schwanhäusser Anwaltssozietät Maximilianstrasse 58 (43) Date of publication of application: 80538 München (DE) 24.01.1996 Bulletin 1996/04 (56) References cited: (73) Proprietor: COL-BAR R & D LTD. DE-A- 4 302 708 FR-A- 2 679 778 Ramat-Gan 52290 (IL) US-A- 4 971 954 (72) Inventors: Remarks: • Pitaru, Sandu The file contains technical information submitted Tel-Aviv 62300 (IL) after the application was filed and not included in this specification Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). EP 0 693 523 B1 Printed by Jouve, 75001 PARIS (FR) EP 0 693 523 B1 Description [0001] The present invention concerns a collagen-based matrix and devices comprising this matrix. -
Pyrolysis of the Simplest Carbohydrate, Glycolaldehyde (CHO-CH2OH), and Glyoxal in a Heated Micro-Reactor
Pyrolysis of the Simplest Carbohydrate, Glycolaldehyde (CHO-CH2OH), and Glyoxal in a Heated Micro-Reactor Jessica Porterfield1, Joshua H. Baraban1, Tyler P. Troy2, Musahid Ahmed2, Michael C. McCarthy3, Kathleen M. Morgan4, John W. Daily5, Thanh Lam Nguyen6, John F. Stanton6, G. Barney Ellison1 1Department of Chemistry and Biochemistry, University of Colorado, Boulder, 80309- 0215, U.S.A., 2Chemical Sciences Division, Lawrence Berkeley National Laboratories, Berkeley, CA 94720, U.S.A., 3Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, 4Department of Chemistry , Xavier University of Louisiana , New Orleans, LA 70125-1098, 5Center for Combustion and Environmental Research, Department of Mechanical Engineering, University of Colorado, Boulder, CO 80309-0427, U.S.A., and 6Department of Chemistry; University of Texas at Austin; Austin, TX 78712. E-mail: [email protected] E-mail: [email protected] E-mail: [email protected] E-mail: [email protected] E-mail: [email protected] E-mail: [email protected] E-mail: [email protected] E-mail: [email protected] E-mail: [email protected] Email: [email protected] J. Physical Chemistry A (revised, March 2016) - 2 - Abstract Both glycolaldehyde and glyoxal have been pyrolyzed in a set of flash- pyrolysis micro-reactors. The pyrolysis products resulting from CHO-CH2OH and HCO-CHO were detected and identified by VUV photoionization mass spectrometry. Complementary product identification was provided by argon matrix infrared absorption spectroscopy. Pyrolysis pressures in the micro- reactor were roughly 100 Torr and contact times with the micro-reactors were approximately 100 µsec. At 1200 K, the products of glycolaldehyde pyrolysis are: H atoms, CO, CH2=O, CH2=C=O, HCO-CHO. -
Continuous Production of Erythrulose Using Transketolase in a Membrane Reactor Jÿrgen Bongs, Doris Hahn, Ulrich Schšrken, Georg A
Biotechnology Letters, Vol 19, No 3, March 1997, pp. 213–215 1 Continuous production of erythrulose using transketolase in a membrane reactor JŸrgen Bongs, Doris Hahn, Ulrich Schšrken, Georg A. Sprenger, 1 Udo Kragl* and Christian Wandrey Institut fŸr Biotechnologie, Forschungszentrum JŸlich GmbH, D-52425 JŸlich, Germany Transketolase can be used for synthesis of chiral intermediates and carbohydrates. However the enzyme is strongly deactivated by the educts. This deactivation depends on the reactor employed. An enzyme membrane reactor allows the continuous production of L-erythrulose with high conversion and stable operational points. A productivity (space- time yield) of 45 g LÐ1 dÐ1 was reached. 24 pts min base to base from Key words to line 1 of text 1 Introduction (10 mM), thiaminpyrophosphate (0.5 mM) and DTT (1 Transketolase (E.C. 2.2.1.1.) is used for the asymmetric mM). The substrate concentration of glycolaldehyde was synthesis of natural substances or their precursors 50 mM, the product concentration of L-erythrulose was such as carbohydrates (Drueckhammer et al., 1991), (+)- 50 mM, each compound dissolved in the liquid buffer exo-brevicomin (Myles et al., 1991), or fagomine system. Other reaction conditions were: pH = 7.0; (Effenberger and Null, 1992). In vivo transketolase cata- T = 25°C. lyses the reversible transfer of a two-carbon ketol moiety from a ketose to an aldose. When b-hydroxypyruvate Repetitive batch (HPA) is used as the donor substrate the reaction The reaction was performed in a commercially available becomes irreversible (Bolte et al., 1987) (Figure 1) even stirred ultrafiltration cell (Amicon) equipped with an 1 though there is a wide range of possible acceptor UF-membrane (Amicon) with a cut-off of 10 kDa. -
Separation and Extraction of Proteins and Polysaccharides from the Seaweed Palmaria Palmata Using Enzyme Digestion
Separation and Extraction of Proteins and Polysaccharides from the Seaweed Palmaria Palmata using Enzyme Digestion by Anna Nilsson Supervisor: Björn Viðar Aðalbjörnsson Co-supervisor: Ph.D. Johan Svensson Bonde Examiner: Professor Leif Bülow 2017 Department of Pure and Applied Biochemistry Faculty of Science Lund University SE-221 00 Lund, Sweden Copywright © 2017 Anna Nilsson All rights reserved Printed in Sweden by Media-Tryck, Lund, 2017 DEPARTMENT OF CHEMICAL ENGINEERING LUND UNIVERSITY P.O. BOX 124 SE-221 00 LUND, SWEDEN ii Organization Document name Lund University Master thesis Date of issue April 2017 Author Anna Nilsson Title and subtitle Separation and Extraction of Proteins and Polysaccharides from the Seaweed Palmaria Palmata using Enzyme Digestion Key words Palmaria palmata, dulse, enzyme digestion, separation, protease, xylan, xylose, seaweed, xylanase Language English, Swedish Recipient’s notes Number of pages 67 iii PREFACE This master thesis was possible thanks to Matís, a food and biotechnology R&D institute located in Reykjavik, Iceland. It commenced 1st of February 2016 and ended with a presentation held the 27/4 2017. The purpose of the project was to find a method of enzymatic extraction of polysaccharides and proteins in Palmaria palmata (P. palmata) a red seaweed. The project focuses mainly on extraction using proteases, which catalyse the hydrolysis of proteins, and xylanase, that catalyse the hydrolysis of xylan. Xylan is the main polysaccharide in P. palmata. The findings intend to be beneficial and useful within the human food and animal feed industry. These new methods and ways to utilize this large ocean resource may lead to more sustainable and environmental solutions compared to already existing terrestrial options such as soy and other grains. -
Expression and Structure-Functional Studies of Human Apolipoproteinciii
Haiqun Liu EXPRESSION AND STRUCTURE-FUNCTIONAL STUDIES OF HUMAN APOLIPOPROTEINCra A thesis submitted in accordance with the regulations of the University of London for the degree of Doctor of Philosophy October 2000 Centre for the Genetics of Cardiovascular Disorders Department of Medicine The Rayne Institute University College London ProQuest Number: U642127 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. uest. ProQuest U642127 Published by ProQuest LLC(2015). Copyright of the Dissertation is held by the Author. All rights reserved. This work is protected against unauthorized copying under Title 17, United States Code. Microform Edition © ProQuest LLC. ProQuest LLC 789 East Eisenhower Parkway P.O. Box 1346 Ann Arbor, Ml 48106-1346 ABSTRACT Apolipoprotein (Apo) CHI plays a key role in triglyceride (TG)-rich lipoprotein metabolism and is a risk factor for coronary heart disease (CHD). The study involved in this thesis is the first in vitro structure-functional study using recombinant apoCni proteins. The physicochemical properties of recombinant wild type and A23T, a naturally occurring mutation that is associated with apoCIII deficiency and lower plasma TG levels, as well as three site-directed mutants of apoCIII, designed by molecular modelling and implicated in lipid binding (L9T/T20L, F64A/W65A) or lipoprotein lipase (LPL) inhibition (K21A), were compared. Relative lipid binding efficiencies of each apoCIII variants to 1.2-dimyristoyl-sn-glycero-3- phosphatidylcholine (DMPC) were: L9T/T20L>WT>K21A>A23T>F64A/W65A with an inverse correlation with size of the discoidal complexes formed. -
Erythritol As Sweetener—Wherefrom and Whereto?
Applied Microbiology and Biotechnology (2018) 102:587–595 https://doi.org/10.1007/s00253-017-8654-1 MINI-REVIEW Erythritol as sweetener—wherefrom and whereto? K. Regnat1 & R. L. Mach1 & A. R. Mach-Aigner1 Received: 1 September 2017 /Revised: 12 November 2017 /Accepted: 13 November 2017 /Published online: 1 December 2017 # The Author(s) 2017. This article is an open access publication Abstract Erythritol is a naturally abundant sweetener gaining more and more importance especially within the food industry. It is widely used as sweetener in calorie-reduced food, candies, or bakery products. In research focusing on sugar alternatives, erythritol is a key issue due to its, compared to other polyols, challenging production. It cannot be chemically synthesized in a commercially worthwhile way resulting in a switch to biotechnological production. In this area, research efforts have been made to improve concentration, productivity, and yield. This mini review will give an overview on the attempts to improve erythritol production as well as their development over time. Keywords Erythritol . Sugar alcohols . Polyols . Sweetener . Sugar . Sugar alternatives Introduction the range of optimization parameters. The other research di- rection focused on metabolic pathway engineering or genetic Because of today’s lifestyle, the number of people suffering engineering to improve yield and productivity as well as to from diabetes mellitus and obesity is increasing. The desire of allow the use of inexpensive and abundant substrates. This the customers to regain their health created a whole market of review will present the history of erythritol production- non-sugar and non-caloric or non-nutrient foods. An impor- related research from a more commercial viewpoint moving tant part of this market is the production of sugar alcohols, the towards sustainability and fundamental research. -
Patent No .: US 10703789 B2
US010703789B2 ( 12 ) United States Patent ( 10 ) Patent No.: US 10,703,789 B2 De Fougerolles et al. (45 ) Date of Patent: * Jul. 7 , 2020 (54 ) MODIFIED POLYNUCLEOTIDES FOR THE (2013.01 ) ; A61K 38/36 ( 2013.01 ) ; A61K PRODUCTION OF SECRETED PROTEINS 38/363 ( 2013.01 ) ; A61K 38/44 ( 2013.01) ; A61K 38/4833 (2013.01 ) ; A61K 38/4846 ( 71 ) Applicant : Moderna TX , Inc., Cambridge, MA (2013.01 ) ; A61K 39/3955 ( 2013.01) ; A61K (US ) 47/10 (2013.01 ) ; A61K 47/54 (2017.08 ) ; A61K 47/542 (2017.08 ) ; A61K 48/0033 ( 2013.01 ) ; ( 72 ) Inventors: Antonin De Fougerolles, Waterloo A61K 48/0066 (2013.01 ) ; A61K 48/0075 ( BE ) ; Justin Guild , Framingham , MA (2013.01 ) ; CO7K 14/47 ( 2013.01 ) ; CO7K (US ) 14/475 ( 2013.01) ; CO7K 14/505 (2013.01 ) ; ( 73 ) Assignee : Moderna TX , Inc., Cambridge , MA CO7K 14/525 (2013.01 ) ; C07K 14/56 (US ) (2013.01 ) ; CO7K 14/565 ( 2013.01 ) ; CO7K 14/745 (2013.01 ) ; C07K 14/75 ( 2013.01) ; ( * ) Notice: Subject to any disclaimer , the term of this CO7K 16/2887 ( 2013.01 ) ; CO7K 16/32 patent is extended or adjusted under 35 ( 2013.01) ; CO7K 19/00 ( 2013.01) ; C12N U.S.C. 154 (b ) by 0 days . 9/0069 ( 2013.01) ; C12N 9/644 ( 2013.01 ) ; C12N 15/85 (2013.01 ) ; C12N 15/88 This patent is subject to a terminal dis ( 2013.01 ) ; C12Y 113/12007 (2013.01 ) ; C12Y claimer . 304/21005 (2013.01 ) ; C12Y 304/21022 (2013.01 ) ; A61K 9/0019 (2013.01 ) ; A61K (21 ) Appl. No.: 16 /438,978 48/00 (2013.01 ) ; C12N 2840/00 (2013.01 ) ( 22 ) Filed : Jun .