... result of NADH oxidation was measured One unit of enzyme activity was defined as the reduction of lmolÆmin)1 of NADH (corresponding to the carboxylation of lmolÆmin)1 of acetyl-CoA) Quantification of ... extinction coefficient of 6200 m)1Æcm)1 One unit of enzyme activity was defined as the oxidation of lmolÆmin)1 of NADH POR enzyme assays The oxidative decarboxylation activity of POR was assayed at ... atmosphere The reduction of metronidazole was calculated using an extinction coefficient of 9300 m)1Æcm)1 One unit of enzyme activity was defined as the reduction of lmolÆmin)1 of metronidazole (corresponding...
Ngày tải lên: 16/02/2014, 09:20
... pmolÆmg)1 of protein to 50 pmolÆmg)1 of protein, representing a maximum of 2–3% of total thiamine For comparison, much larger amounts of AThTP could be observed in E coli under conditions of carbon ... accumulation of ThTP and AThDP is observed (Fig 2C), although the amount of AThTP is much lower The presence of AThDP was further confirmed by the condensation of ThMP and AMP in the presence of N,N¢-dicyclohexylcarbodiimide ... ThcTP, caused by stacking of the molecules; this is possible because of the planar structure of the conjugated thiochrome part In adenosine thiamine derivatives, because of the U-shaped structure,...
Ngày tải lên: 07/03/2014, 01:20
Báo cáo khoa học: Methylene analogues of adenosine 5¢-tetraphosphate Their chemical synthesis and recognition by human and plant mononucleoside tetraphosphatases and dinucleoside tetraphosphatases pot
... biosynthesis of adenosine tetraphosphate Biochemistry 5, 26–33 Jakubowski H (1986) Sporulation of the yeast Saccharomyces cerevisiae is accompanied by synthesis of adenosine 5¢-tetraphosphate and adenosine ... potential usefulness of certain p4A analogues for the further study of the metabolism of mononucleoside polyphosphates and dinucleoside polyphosphates as well as of the functioning of different purine ... analogues of adenosine 5¢-tetraphosphate A Guranowski et al 45 Trowbridge DB & Kenyon GL (1970) Adenosine 5¢-bis(dihydroxyphosphinylmethyl)-phosphinate, the a,b: b,c-bis(methylene) analog of adenosine...
Ngày tải lên: 16/03/2014, 14:20
Báo cáo khoa học: Total chemical synthesis and NMR characterization of the glycopeptide tx5a, a heavily post-translationally modified conotoxin, reveals that the glycan structure is a-D-Gal-(1fi3)-a-D-GalNAc pot
... monoisotopic [M-2CO2-H]– mass of 1840.42 Da) The mass shift of Da (MR ) M) confirms the formation of the two disulfide bridges However, comparison of the retention times of the hydrophilic tx5a, hydrophobic ... costs of the reagents and our desire to obtain peptides that were of the highest purity Also, the use of only a slight excess (10–20%) of some expensive amino acids contributed to the low yield of ... neutral pH of 7.0 in the presence of Chelex 100 to ensure that all trace metal ions were removed This sample was then lyophilized and redissolved in 350 lL of 99.96% D2O (0.7 mM) (Cambridge Isotope...
Ngày tải lên: 23/03/2014, 13:20
Báo cáo hóa học: " Wet chemical synthesis and magnetic properties of single crystal Co nanochains with surface amorphous passivation Co layers" pdf
... of 8.86 Å (5 × 1.772 Å) is consistent with that of the [200] planes of single-crystalline face-centered Co, which is compatible with the data of XRD The SAED patterns (see the inset in Page of ... interpretation of results, and gave final approval of the version to be Zhou et al Nanoscale Research Letters 2011, 6:285 http://www.nanoscalereslett.com/content/6/1/285 Page of published SY ... analysis of the magnetic properties as a function of the NC with various amorphous shell sizes will be published separately Zhou et al Nanoscale Research Letters 2011, 6:285 http://www.nanoscalereslett.com/content/6/1/285...
Ngày tải lên: 21/06/2014, 04:20
09 Physical and Chemical Characteristics of DDGS revisions.
... (lightness of color) and b* (yellowness of color), with an increase in a* (redness of color) Similar results were also reported by Ganesan et al (2005) Table The Effect of the Rate of Solubles ... they evaluated color in batches of DDGS where approximately 0, 30, 60 and 100% of the maximum possible of syrup was added to the mash before drying Actual rates of solubles addition to the mash ... color Corn-sorghum blends of DDGS are also somewhat darker in color than corn DDGS because of the bronze color of many sorghum varieties When a relatively high proportion of solubles are added to...
Ngày tải lên: 08/08/2012, 10:03
Different physical and chemical pretreatments of wheat straw for enhanced biobutanol production in simultaneous saccharification and fermentation
... concentration was varied from 2.5 to 5.0% where, 2.5 g and 5.0 g of wheat straw were added The effect of temperature and the effect of combination of xylanase, cellulase, and β-glucosidase were examined ... reesei with the enzyme activity of 700 IU/g, and Novozyme 188 is composed of Cellobiase from Aspergillus niger with the enzyme activity of 250 IU/g The effect of temperature was examined where ... 3.0 g of glucose and 0.1 g of yeast extract was added to distilled water to produce 100 ml of P2 medium in a 250 ml glass vial This vial was sterilized at 121°C for 15 Approximately 1.0 ml of each...
Ngày tải lên: 05/09/2013, 15:28
Tài liệu PHYSICAL AND CHEMICAL ASPECTS OF ORGANIC ELECTRONIC doc
... various aspects of OFETs, including the synthesis of new materials, preparation and characterisation of organic thin films, characterisation of device properties and the development of new device ... Organic Electronics Structural and Electronic Properties of OFETs Edited by Christof Wöll WILEY-VCH Verlag GmbH & Co KGaA The Editor Prof Dr Christof Wöll Lehrstuhl für Physikalische Chemie I der Ruhr-Universität ... nature of the organic/inorganic interfaces The analysis of OFET device characteristics allows many of the key problems in organic electronics to be stressed, ranging from fundamentals (nature of...
Ngày tải lên: 16/02/2014, 19:20
Tài liệu Báo cáo khoa học: a-Defensins increase lung fibroblast proliferation and collagen synthesis via the b-catenin signaling pathway doc
... presence and absence of SB203580 (10 lm), a specific selective inhibitor of p38 MAP kinase, or LY294002 (20 lm), a specific inhibitor of PI3K, for 1–24 h, after which the protein contents of phosphorylated ... GSK3b on Thr390, leading to inactivation of GSK3b and accumulation ⁄ activation of b-catenin The inactivation of GSK3b can also be caused by phophorylation of its N-terminus at Ser9 by Akt [18] ... that a mixture of HNP, predominantly consisting of a-defensins-1 and -2, induced activation of the p38 MAP kinase and PI3K ⁄ Akt pathways in human monocytes (U937) The mixture of HNP activated...
Ngày tải lên: 18/02/2014, 06:20
Tài liệu Báo cáo khoa học: Endotoxic activity and chemical structure of lipopolysaccharides from Chlamydia trachomatis serotypes E and L2 and Chlamydophila psittaci 6BC pdf
... dissolved at a concentration of 20 ngÆlL)1 in 2-propanol/ water/triethylamine in a ratio of : : 0.01 (v/v/v) and sprayed at a flow rate of lLÆmin)1 MALDI-TOF MS of LPS and free lipid A were ... the chemical structures of which are already known [12,13] The negative ion MALDI-TOF mass spectrum of the native LPS (Fig 1) exhibited a complex pattern of several groups of ion peaks representing ... and of laser-induced fragment ions [18] representing the lipid A moiety of LPS (centered around m/z 1850, 1641, and 1347) The mass difference of D m/z 660 between the respective groups of ions of...
Ngày tải lên: 20/02/2014, 23:20
Tài liệu Báo cáo Y học: Steady-state kinetics of the glutaminase reaction of CTP synthase from Lactococcus lactis The role of the allosteric activator GTP in coupling between glutamine hydrolysis and CTP synthesis potx
... time are derived from the heat of dilution of glutamine into the reaction cell (B) The heat generated by hydrolysis of 0.15 lM of glutamine used to determine DH of the reaction ể FEBS 2002 4774 ... GTP activation of the glutaminase activity in the presence of 0.1 mM (open circles) or mM (closed circles) each of UTP and ATP-cS (C) GTP activation of CTP synthesis at 0.1 mM each of UTP and ATP ... the role of GTP was solely to increase the rate of glutamine hydrolysis, there would have been no effect of adding GTP when the rate of CTP synthesis was limited by the concentration of nucleotide...
Ngày tải lên: 21/02/2014, 15:20
Lecture 3 DNA RNA and protein synthesis great
... strands of DNA on chromosomes What is DNA? DNA is the genetic code, Instructions for heredity, Components of genes, Director of protein synthesis AND- DNA is also A type of nucleic ... nucleic acid A type of organic compound A polymer {a compound made of repeating subunits} WHAT DOES “DNA” STAND FOR? DNA’s proper name isDeoxyribonucleic acid! Consists of a ribose SUGAR ... examples of proteins are: Melanin, the pigment that gives our skin color Enzymes, the catalysts that help digest our food Well, that clears it up! Structure of DNA A nucleotide of DNA is...
Ngày tải lên: 13/03/2014, 16:36
HANDBOOK ON CHEMICAL WEAPONS CONVENTION FOR INDIAN CHEMICAL INDUSTRY AND CHEMICAL TRADERS ppt
... parts of the plant site Access to other parts of the plant site is to be given in accordance with the provision of Paragraph 25 of Part VII and paragraph 51 of Part II of Verification Annex (VA) of ... type of inspection (b) The point of entry (c) The date and estimated time of arrival at the POE (d) The means of arrival at the point of entry (e) The site to be inspected (f) The names of inspectors ... the in-country arrival of IT for inspection and the location of departure of IT after completion of their mission The procedure for Point of Entry in receiving IT, clearance of goods / equipment...
Ngày tải lên: 14/03/2014, 19:20
Aircraft measurements over Europe of an air pollution plume from Southeast Asia – aerosol and chemical characterization pot
... Akimoto, 2001) Much of our current understanding of the impact of intercontinental air pollution transport on the chemical composition of the atmosphere is based on the results of model studies ... adsorption of nitric acid on the wall of the sampling tube, respectively The accuracy of the NO and NOy measurements is and 15%, respectively, for a time resolution of s Detections of CO and O3 ... from the beginning since the limited range of the aircraft, the short campaign duration of five days and the small number of flight hours dictated a plume-ofopportunity approach A major pollution...
Ngày tải lên: 15/03/2014, 20:20
Concentration and chemical speciations of cu, zn, pb and cr of urban soils in nanjing, china
... soils in this study Profile Number of Soil groupa no horizons 8 10 11 12 13 14 15 16 17 18 19 20 7 7 a b c b urban park urban park urban park campus campus campus campus campus vegetable garden ... deviation of each soil profile 103 a Tur-Anthric Entisols Tur-Anthric Entisols Arp-Udic Luvisols Hap-Orthic Gleysols Tur-Anthric Entisols Tur-Anthric Entisols Hyp-Udic Cambsols Hyp-Udic Cambsols ... Group of Natural Background Values of Soil and Academia Sinica (1979) Liu (1996) concentration is triple the mean value of soils in China and twice as much as the natural background value of soils...
Ngày tải lên: 15/03/2014, 23:22
Báo cáo khoa học: Soluble recombinant CD69 receptors optimized to have an exceptional physical and chemical stability display prolonged circulation and remain intact in the blood of mice doc
... Characterization of the purified soluble proteins The identity of the prepared protein was confirmed by sequence mapping of tryptic digests with MALDI-TOF MS with a good sequence coverage The total mass of the ... Instruments, Malvern, UK) Estimates of hydrodynamic radii of the expected molecular species were calculated with the software hydropro [26] The structures of monomers and dimers of the human CD69 in the ... Examination of the native size of soluble CD69 Because the crystals of CD69NG70 contained molecules packed as noncovalent dimers, we were interested to determine the native size and the monodispersity of...
Ngày tải lên: 16/03/2014, 04:20
Integrated Systems of Meso-Meteorological and Chemical Transport Models docx
... the focus of presentations and discussions: l l l l Online and of ine coupling of meteorological and air quality models Implementation of feedback mechanisms, direct and indirect effects of aerosols ... all of which affect the composition of the atmosphere (Penner et al 1998; Shine 2000; IPCC 2007, 2001) Probably one of the most important sources of uncertainty relates to the indirect effect of ... in CAM3 since it assumes an external-mixture Among the five models, GATOR/GCMOM is the only model that simulates composition of IDN MIARGE and CAM use a prognostic parametrization in terms of...
Ngày tải lên: 16/03/2014, 23:20
Báo cáo khoa học: High thermal and chemical stability of Thermus thermophilus seven-iron ferredoxin Linear clusters form at high pH on polypeptide unfolding doc
... resynthesis of cubic (functional) clusters Summary Examination of the crystal structure of the seven-iron ferredoxin from T thermophilus has suggested that it represents the minimal functional unit of ... Sligar, S.G (1997) Energetics of heme binding to native and denatured states of cytochrome b562 Biochemistry 36, 16141–16146 Frazzon, J & Dean, R.D (2001) Feedback regulation of ironsulfur cluster biosynthesis ... 220 nm, characteristic of the presence of secondary structure Both CD bands lose intensity as the protein unfolds (Fig 2C), and the CD spectrum on unfolding resembles that of a random-coil polypeptide...
Ngày tải lên: 16/03/2014, 23:20