conversion of amino acids to specialized products
Biodegradable Polymers Composed of Naturally Occurring α-Amino Acids
... esters of α-AAs to enter into various undesirable self-condensation reactions [62] with the formation of diketopiperazines and other cyclic and linear unidentified products This leads to imbalance of ... refluxed benzene or toluene in the presence of TosOH monohydrate (2 mol), Scheme 5.1 The presence of TosOH•H2O (2 mol) serves as both the reaction catalyst and amino group protector, preventing undesirable ... di-p-toluenesulfonic acid (TosOH) salts They are generally 109 110 Biodegradable Polymers Composed of Naturally Occurring α -Amino Acids H2N CH(R) COOH + HO TosOH H2N CH(R) CO -4 H2O D OH O D + TosOH...
Ngày tải lên: 25/10/2013, 08:20
Utilizing knowledge base of amino acids structural neighborhoods to predict protein-protein interaction sites
... converted into labeled graphs with nodes corresponding to amino acids and edges to pairs of neighboring amino acids A structural neighborhood of each node was then encoded into a bit string and stored ... them; 2) encoding of descriptors (atom type and the number of bonds for both atoms and their topological distance); 3) conversion into bit strings; 4) concatenation of bit strings into one number; ... central atom Fig Construction of atom pair fingerprint When creating an atom pair fingerprint, following steps are performed for each pair of heavy atoms: 1) extraction of given pair of atoms and...
Ngày tải lên: 25/11/2020, 16:27
Microbial Production of Amino Acids in Japan
... soybea1ns contain lower amounts of lysine, which is one of Microbial Production of Amino Acids in Japan 77 the essential amino acids for those livestocks The estimated amount of l-lysine produced in ... successful introduction of the technology, various methods were searched for and developed for microbial production of other amino acids Today a whole array of amino acids are produced by microbial ... Production of Amino Acids in Japan Hidehiko Kumagai Laboratory of Applied Molecular Microbiology, Graduate School of Biostudies, Kyoto University, Kitashirakawa -oiwakecho, Sakyo-ku, Kyoto 606–8502,...
Ngày tải lên: 26/10/2013, 02:20
Báo cáo khóa học: Vertical-scanning mutagenesis of amino acids in a model N-myristoylation motif reveals the major amino-terminal sequence requirements for protein N-myristoylation ppt
... Nmyristoylation In the present study, to examine the effect of the combination of amino acids at positions and on protein N-myristoylation, sequential vertical-scanning mutagenesis of the amino acids ... the combination of amino acids at positions and might be a critical determinant for protein N-myristoylation In this study, to examine the effect of the combination of amino acids at positions ... addition to the combination of amino acids at positions and 6, it was demonstrated that the combination of amino acids at positions and also affects the susceptibility of the protein to protein...
Ngày tải lên: 16/03/2014, 16:20
Guanidine catalyzed enantioselective mannich reaction towards the synthesis of amino acids
... REACTION: TOWARDS THE SYNTHESIS OF -AMINO ACIDS PAN YUANHANG NATIONAL UNIVERSITY OF SINGAPORE 2011 GUANIDINE CATALYZED ENANTIOSELECTIVE MANNICH REACTION: TOWARDS THE SYNTHESIS OF -AMINO ACIDS ... THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMISTRY NATIONAL UNIVERSITY OF SINGAPORE To my parents for their love, support, and encouragement Acknowledgements I would like to take this ... 1.2 Monitoring of the reaction in DMF-d7 as a function of time at room temperature Figure 2.1 pKa vaules of -protons of nucleophiles in DMSO Figure 3.1 Characterization of intermediate...
Ngày tải lên: 10/09/2015, 08:31
Conversion of saline water to fresh water using air gap membrane distillation (AGMD)
... SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF MECHANICAL ENGINEERING NATIONAL UNIVERSITY OF SINGAPORE 2010 ACKNOWLEDGEMENTS First of all, the author is grateful to Allah the Almighty, ... but also was the mentor to endow with encouragement in the time of distress during the course of study. The author expresses her sincere gratitude to her co-supervisor Professor K.C. Ng, for ... attention you were deceived of during the course of my study. iii TABLE OF CONTENTS ACKNOWLEDGEMENTS i TABLE OF CONTENTS iv SUMMARY xi LIST OF TABLES xv LIST OF FIGURES xvi NOMENCLATURE...
Ngày tải lên: 11/09/2015, 09:57
CONVERSION OF LEVULINIC ACID TO GAMMA VALEROLACTONE USING p CYMENE RU(II) n HETEROCYCLIC CARBENE COMPLEXES
... suitable catalyst to be decomposed to H 2 and CO2 followed by the conversion of LA to GVL. Page 8 Conversion of LA to GVL using p-cymene Ru(II) NHC Complexes The decomposition of FA can occur ... use of either homogeneous[16] or heterogeneous catalysts.[17] Page 5 Conversion of LA to GVL using p-cymene Ru(II) NHC Complexes [17n] Scheme 1. Reaction pathways of LA to GVL. Scheme 2. Conversion ... use of rhenium catalysts (Re black, Re(IV) oxide hydrate) for the hydrogenation of LA to GVL.[17d] Yan et. al reported the hydrogenation of LA to GVL using Ru/C and achieved a 92% conversion of...
Ngày tải lên: 01/10/2015, 17:27
CONVERSION OF LEVULINIC ACID TO GAMMA VALEROLACTONE USING p CYMENE RU(II) n HETEROCYCLIC CARBENE COMPLEXES
... suitable catalyst to be decomposed to H 2 and CO2 followed by the conversion of LA to GVL. Page 8 Conversion of LA to GVL using p-cymene Ru(II) NHC Complexes The decomposition of FA can occur ... use of either homogeneous[16] or heterogeneous catalysts.[17] Page 5 Conversion of LA to GVL using p-cymene Ru(II) NHC Complexes [17n] Scheme 1. Reaction pathways of LA to GVL. Scheme 2. Conversion ... use of rhenium catalysts (Re black, Re(IV) oxide hydrate) for the hydrogenation of LA to GVL.[17d] Yan et. al reported the hydrogenation of LA to GVL using Ru/C and achieved a 92% conversion of...
Ngày tải lên: 03/10/2015, 21:57
CONVERSION OF LEVULINIC ACID TO GAMMA VALEROLACTONE USING p CYMENE RU(II) n HETEROCYCLIC CARBENE COMPLEXES
... suitable catalyst to be decomposed to H 2 and CO2 followed by the conversion of LA to GVL. Page 8 Conversion of LA to GVL using p-cymene Ru(II) NHC Complexes The decomposition of FA can occur ... use of either homogeneous[16] or heterogeneous catalysts.[17] Page 5 Conversion of LA to GVL using p-cymene Ru(II) NHC Complexes [17n] Scheme 1. Reaction pathways of LA to GVL. Scheme 2. Conversion ... use of rhenium catalysts (Re black, Re(IV) oxide hydrate) for the hydrogenation of LA to GVL.[17d] Yan et. al reported the hydrogenation of LA to GVL using Ru/C and achieved a 92% conversion of...
Ngày tải lên: 04/10/2015, 07:59
Catalytic conversion of methanol dimethylether to light olefins over microporous silicoaluminophosphates catalysts
... Review DTO reactions have a number of strong points compared to MTO reactions. In thermodynamic point of view, a lower pressure was favored in DME synthesis to achieve high conversion of CO/H2. ... for dehydration of methanol to DME. When this stage was over, the activity of catalyst was totally lost and higher amount of methanol was seen on product streams. Thus, DME% was one of the factors to determine ... the DME feed conversion was dramatically dropped after 50 min of TOS. When the TOS was over 100 min, the conversion of DME feed approached to zero while methanol feed has over 50% conversion. ...
Ngày tải lên: 16/10/2015, 15:38
Topic: Modification of rice starch properties by addition of Amino Acids at various PH levels
... Curves of Rice Starches with Amino Acids at pH (Buffer) 82 3.23 Thermal Curves of Rice Starches with Amino Acids at pH 10 (Buffer) 83 3.24 Thermal Curves of Rice Starches with Amino Acids ... LIST OF TABLES 2.1 Representative Amino Acids and Their Structures 21 2.2 pK and pI Values of Ionizable Groups of Amino Acids Used in This Study 22 3.1 Proximate Composition of Native ... Starches Added with Amino Acids in pH Solutions 50 3.8 Pasting Curves of Rice Starches Added with Amino Acids in pH 10 Solutions 52 3.9 Pasting Curves of Rice Starches with Amino Acids Dispersed...
Ngày tải lên: 17/01/2020, 05:53
chiroptical properties of amino acids a density functional theory study
... since it took into account the interaction of this amino- acid with a surface Most of the experiments in the present field of research are based on the detection of spectroscopic properties of molecules ... variety of organic compounds was detected, not only hydrocarbons and amino acids [4] but also diamino acids [5] and even nucleobases [6] Moreover, recent studies have confirmed that amino acids ... instruments are capable of reaching wavelengths under 190 nm, down to 130 nm The aim of these experiments was to study the susceptibility of the considered molecules to asymmetric photolysis, by highlighting...
Ngày tải lên: 01/11/2022, 09:01
Comparative analysis of corynebacterium glutamicum genomes: a new perspective for the industrial production of amino acids
... Page of 13 relevant to lysine synthesis gaining one or more mutations [21] According to our MLST analysis, B253 has a profile very similar to B1’s (profile of B253: 1-2-4-7-9-3-2, profile of B1: ... of amino acids Analyses of these strains have two major objectives: to provide (1) an overview genomic analysis and pan-genomic study of the species; and (2) a direct comparison between the amino ... glutamicum, Pan-genome, Comparative genomics, Production of amino acids * Correspondence: syang@sibs.ac.cn Key Laboratory of Synthetic Biology, Institute of Plant Physiology and Ecology, Shanghai Institutes...
Ngày tải lên: 19/11/2022, 11:44
reduced acid dissociation of amino acids at the surface of water
... the probed amino acids there will be an asymmetry in the top molecular layers of the water solvent due to the preferred orientation of the hydrophilic and the hydrophobic groups of the amino acid ... making it possible that the amount of deprotonation in the top molecular layers differs from the average deprotonation ACS Paragon Plus Environment Page of 15 Page of 15 10 11 12 13 14 15 16 17 18 ... orientation anymore, as all groups of the amino- acid are interacting with water Hence, the VSFG signal is only due to amino acids and their conjugate bases located in the top molecular solvent layers,...
Ngày tải lên: 04/12/2022, 16:08
Multiplexed analysis of amino acids in mice brain microdialysis samples using isobaric labeling and liquid chromatography-high resolution tandem mass spectrometry
... method was applied to study the effect of d-amphetamine perfusion to the mouse brain on absolute concentrations of 21 amino acids The distribution of amino acids and the effect of the central nervous ... quantification of amino acids in urine[19] and for relative quantification of amino acids and amines in urine and plasma samples for discovering potential hepatotoxic biomarkers [20] These types of 2-plex ... and stable isotope-labeled internal standards, and was used to analyze amino acids in mouse brain microdialysis samples The TMT10-plex labeling of amino acids allowed analysis of ten samples...
Ngày tải lên: 25/12/2022, 02:47
Study on extraction, conversion of hydroxycitric acid from leaves and fruit rinds of Garcinia oblongifolia Champ.ex Benth and its application to produce weight-loss products
... quantitative determination of acids in leaves and rinds of this kind of tree. - Refining, analyzing the parameters of tested samples, products. - Metabolic reaction of HCA into metal salt in groups ... extraction, conversion of hydroxycitric acid from leaves and fruit rinds of Garcinia oblongifolia Champ. Ex Benth (G. oblongifolia) and its application to produce weight-loss products? ?? as the doctorial ... technology, especially to fat loss products. However, none of the mentioned projects have showed the study of hydroxycitric acid (HCA) transformation and its application to slimming food products in...
Ngày tải lên: 07/05/2015, 21:00
Asymmetric synthesis of α-(heteroaryl)alkylamines and α-amino acids via nucleophilic 1,2-addition of lithiated heterocycles to aldehyde SAMP-hydrazones
... spectroscopy Finally, conversion into α -amino acids was carried out by treatment of 7a–e, 4j with a catalytic amount of RuCl ·H O in the presence of a large excess of NaIO in a mixture of H O/CH Cl /CH ... account of this research and further applications of this protocol to the synthesis of α -amino acids Our general protocol exploring the use of easily accessible lithium hetarenes is depicted ... spectra of the crude products showed only the desired hydrazines without the presence of starting material or eventual side products Table Nucleophilic 1,2-addition of lithiated hetarenes to 2a to...
Ngày tải lên: 12/01/2022, 22:46
Harpers illustrated biochemistry, 28th edition
... Chapter 28 Catabolism of Proteins & of Amino Acid Nitrogen Chapter 29 Catabolism of the Carbon Skeletons of Amino Acids Chapter 30 Conversion of Amino Acids to Specialized Products Chapter 31 Porphyrins ... nutritionally essential amino acids PROPERTIES OF AMINO ACIDS The Genetic Code Specifies 20 L - -Amino Acids Of the over 300 naturally occurring amino acids, 20 constitute the monomer units of proteins While ... exception of glycine, the -carbon of amino acids is chiral Although some protein amino acids are dextrorotatory and some levorotatory, all share the absolute configuration of amino acids Several...
Ngày tải lên: 04/05/2014, 20:14
Mạch điện tử - chương 7 - OP-AMP-Khuếch đại và ứng dụng
... sai số đặc tính thực tế tạo Các tác nhân là: + Dòng điện phân cực ngõ vào + Dòng điện offset ngõ vào + Điện offset ngõ vào + Sự trơi Khi op-amp hoạt động với tín hiệu xoay chiều, tụ liên lạc ngăn ... (hình 7.65b) vio gọi điện offset ngõ vào - - vo=2mv (thí d ) Op-Amp thực tế + (a) 0V vo=vio=2m v + vio=2mv (b) Hình 7.65 Nếu ngõ v0
Ngày tải lên: 10/10/2012, 15:51
Op amp applications handbook
... The feedback resistor R2 is ac coupled to the low impedance emitter of transistor Q1 The circuit design was somewhat awkward because of the lack of good high frequency PNP transistors, and it also ... expression of the network as seen from the top of RF to the output across RG as β Note that this usage is a general feedback network transfer term, not to be confused with bipolar transistor forward ... action to be equal to that seen at the (+) input, VIN Given this relationship, it is relatively easy to work out the ideal gain of this stage, which in fact turns out to be simply the inverse of...
Ngày tải lên: 04/10/2013, 17:42
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