iif is your friend
Progress in Controlled Radical Polymerization: Mechanisms and Techniques pot
... syndiotactic isomer (C) this is best achieved in the helical form However, although the helical syndiotactic structure (C) is favored over the linear isotactic structure (A) the energy difference is much ... Department of Chemistry at Southern Methodist University in 2010 Research interests include polymerization techniques, functional materials, coordination chemistry, catalysis, and the chemistry of hypervalent ... stereochemistry of the penultimate unit of the polymer chain into account when predicting the stereochemistry; further ab initio testing of this result is currently underway Figure Isotactic...
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Tài liệu Dramatic Attenuation in Fiber Access Terminals at Low Temperatures doc
... problem After stripping the mid-span section, the attenuation disappeared - thus isolating the problem to the fiber sub-unit alone Although this, in itself, provided a potential field solution–stripping ... entire length of sub-unit material was both labor-intensive and risky to the fiber As a result, ADC set out to establish a craftfriendly procedure that would simplify the solution to the problem ... of the enclosure panel This prevents movement during any future maintenance activity Final Notes Ribbon cable is not susceptible to the same low temperature attenuation issue since the ribbon strands...
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Tài liệu Báo cáo khoa học: High activity of human butyrylcholinesterase at low pH in the presence of excess butyrylthiocholine pptx
... catalytic histidine, H438(440) The persistence of activity in the presence of the protonated form of the catalytic histidine is inconsistent with the generally accepted mechanism for hydrolysis by ... The term k is the observed rate, kA is the limiting rate at high pH, kH is the rate for singly protonated form, kH2 is the limiting rate at low pH (zero in this case), K2 is the dissociation ... presence of excess BTC, BuChE is active even though H438 is protonated The existence of substantial activity for BuChE when the catalytic histidine is protonated is an unprecedented observation,...
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Báo cáo khoa học: Unusual stability of human neuroglobin at low pH – molecular mechanisms and biological significance docx
... protonation of the distal His64 in Ngb is responsible for the pH-dependent changes in the oxygen affinity of this protein [10] Discussion Conformational stability of Ngb In this study, the conformational ... whereas the pH1 ⁄ displayed by Ngb is 3.3 (Fig 5A) It was recently shown that, at slightly acidic pH values, substitution of the distal His residue in Ngb shifts the heme ligation mechanism of Ngb towards ... revealed loss of the typical hexacoordinated His–Fe–His heme environment and indicated the presence of an ironcoordinated water molecule (His–Fe–H2O) On this basis, we used the H64Q mutant of Ngb to...
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Báo cáo khoa học: Different roles of two c-tubulin isotypes in the cytoskeleton of the Antarctic ciliate Euplotes focardii Remodelling of interaction surfaces may enhance microtubule nucleation at low temperature doc
... equatorial area (Fig 6E,G), which suggests that this cell is entering mitosis and that duplication of basal bodies at the dorsal surface requires the disassembly of dorsal cilia In mitotic E focardii ... sequences at these locations, consistent with the possibility that the functions of the single c-tubulin found in most organisms may be partitioned between the two protistan isotypes Together, our results ... of the dorsal surface during cell division in E focardii is associated, perhaps causally, with disassembly of the equatorial cilia and their microtubules It is tempting to speculate that the ciliary...
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Changes in the Economic Value of Variable Generation at High Penetration Levels: A Pilot Case Study of California pot
... Capacity (GW) Flat Block Flat Block New_Gas_CC Exist_Gas_CT Exist_Gas_ST Exist_Gas_CC Exist_Coal_ST Exist_Geothermal Exist_Nuclear Exist_Hydro Exist_Storage 300 250 200 150 100 50 0% 5% 10% 15% ... w/o TES 100 100 100 80 60 Wind Solar New_Gas_CC Exist_Gas_CT Exist_Gas_ST Exist_Gas_CC Exist_Coal_ST Exist_Geothermal Exist_Nuclear Exist_Hydro Exist_Storage 40 20 0% 2.5% 5% 10% 15% 20% 30% Figure ... capacity is coal, 35% is CCGT, 9% is CT, 0.2% is natural gas steam turbine (almost all of the existing natural gas steam turbine fleet is assumed to reach the end of its technical life by 2030), 10% is...
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Maximum reproductive rate of fish at low population sizes potx
... Can J Fish Aquat Sci Vol 56, 1999 sis is consistent with our preliminary analysis (Myers et al 1996) The common belief that there is no relationship between spawner biomass and recruitment is founded ... assistance We thank the hundreds of assessment biologists whose hard work made this metaanalysis possible Special thanks to Pamela Mace whose input was key to developing these ideas This paper is ... parameters is β The unknown vector β consists of the overall mean µ and the pβi s The vector β is related to y by the known model matrix X, whose elements are 0, 1, and Si,t ; the form of this matrix is...
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TiO2nanotubes and CNT–TiO2hybrid materials for the photocatalytic oxidation ofpropene at low concentration
... explored at all for this application or, in general, for gaseous phase applications In this respect, the novelty of this work is a detailed investigation of various TiO2 nanotubes, consisting of either ... consists of a quartz reactor (cutoff < 200 nm) where the photocatalyst bed is placed on quartz wool The reactor is 50 mm height, its diameter is 20 mm and the quartz wool support height is around ... analysis confirmed, the crystal size for anatase in TiO2-NT1 is similar to that of rutile in TiO2-NT3, thus the crystal size is not responsible for the observed difference This observation is even...
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Báo cáo Y học: Characterization of a partially folded intermediate of stem bromelain at low pH ppt
... Biochemistry 33, 106±115 35 Chen, Y.H., Yang, J.T & Martinez, H.M (1972) Determination of the secondary structure of proteins by circular dichroism and optical rotatory dispersion Biochemistry ... relatively more exposed to solvent However at pH 2.0 there is a decrease in the ¯uorescence emission intensity with a slight blue shift (% 3±4 nm) This blue-shifted ¯uorescence of stem bromelain at pH ... of stem bromelain is irreversible Fluorescence and CD data support the involvement of an intermediate state at pH 2.0 This state retains considerable secondary structure and is characterized by...
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Báo cáo khoa học: ATPase activity of RecD is essential for growth of the Antarctic Pseudomonas syringae Lz4W at low temperature potx
... of the 25 °C activity (data not shown) This is surprising, considering the fact that the protein displayed approximately 30% ATPase activity at °C This suggests that the DNA strand separation ... Consistent with this, the present study demonstrates that D323N and E324Q mutants of P syringae RecD not display ATPase and helicase activities in vitro However, a surprising finding here is that ... this study for stimulation of ATPase and preparation of various helicase substrates for RecD Table S2 Primers used in this study for cloning and mutagenesis of P syringae recD This material is...
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Báo cáo khoa học: The histidine-phosphocarrier protein of Streptomyces coelicolor folds by a partially folded species at low pH ppt
... construction as its structure, as observed by NMR (unpublished results), is similar to that found in other members of the HPr family and the His6-tag is disordered in solution, making no contacts with ... the curves cannot be superimposed This is classical evidence of the accumulation of an equilibrium intermediate [46] It is worth mentioning here that this is the first time such an intermediate ... technical assistance This work was supported by Projects GV-00-024-5, and CTIDIB/2002/6 from Generalitat Valenciana; Project BIO2000-1081, from the Spanish Ministry of Science; and FIS01/0004-02...
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Báo cáo hóa học: " Catalytic ozone oxidation of benzene at low temperature over MnOx/Al-SBA-16 catalyst" pdf
... exhibited no Mn-particle peak This result indicates that Mn was dispersed uniformly within Al-SBA-16-MA15%, whereas it was poorly dispersed in Al-SBA-16-MN15%, and Mn oxides existed as large-sized particles ... Al-incorporated sample is hereafter referred to as Al-SBA-16 The amount of Mn impregnated using Mn(NO ) (98%, Aldrich, St Louis, MO, USA) and Mn(CH3COO)2 (> 99%, Aldrich, St Louis, MO, USA) as the ... the ozone conversion In this study, the gas-phase reaction of benzene with ozone was shown to be negligible Results and discussion Characterization of Al-SBA-16 Table lists the textural properties...
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Báo cáo hóa học: " A Versatile Route for the Synthesis of Nickel Oxide Nanostructures Without Organics at Low Temperature" doc
... respectively The visible emission is related to the defects-related deep level emission such as oxygen vacancies and Ni interstitials Finally, there are a weak and a broad visible emission band at ... °C This synthetic technique has the following advantages: firstly, it is a one-step synthesis approach, making it easy to control the growth kinetics Secondly, the synthesis needs no sophisticated ... and the analysis in the NiO nanoparticles/nanoflowers indicates an atomic ratio of 86% Ni and 14% O, which is very near to the theoretical value (7% error is attributed to the analysis technique)...
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Báo cáo hóa học: " Research Article How to Solve the Problem of Bad Performance of Cooperative Protocols at Low SNR Charlotte Hucher, Ghaya Rekaya-Ben Othman, and Jean-Claude Belfiore" potx
... performance at low SNR is poorer than that of the noncooperative scheme To solve this issue, we introduce the adaptive AF strategy where the choice of a transmission scheme is based on the channel ... of this new adaptive AF strategy is to evaluate the qualities of the three schemes (SISO, AF, and NLOS) and to select the best of them Generalization to the N-relay case S and destination D is ... the adaptive AF strategy is to consider all possible transmission schemes and decide which one to select In order to better understand this strategy, the one-relay case is detailed, before the...
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báo cáo khoa học: " Light has a specific role in modulating Arabidopsis gene expression at low temperature" potx
... development of Arabidopsis cold acclimation is discussed Results Physiological consequences of the cold treatments on Arabidopsis photosynthetic apparatus Eight-week old Arabidopsis plants were transferred ... Transcription of nuclear genes is also known to be orchestrated by photosynthesis products [3,4] A wealth of global gene expression data is now available from Arabidopsis plants exposed to various ... Arabidopsis leaves after four thylakoid proteins isolated Phosphothreonine-immunoblot ofdifferent treatments Figure Phosphothreonine-immunoblot of thylakoid proteins isolated from Arabidopsis leaves...
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báo cáo khoa học: " Spatial distribution of transcript changes in the maize primary root elongation zone at low water potential" docx
... for genetic analysis in lieu of the hybrid Similar to the results with the hybrid, four regions of the root tip with distinctly different elongation characteristics were distinguished (Figure 1; ... of the latter might involve genes for secondary wall synthesis [10] To experimentally make this distinction a third pair-wise comparison (C2/3) was included to compare expression of genes between ... ether, (3) in membrane lipid synthesis, (4) in raffinose synthesis, (5) in UDP-sugar synthesis, and (6) in phytate and phosphoinositide synthesis [26] Nitrogen metabolism Transcripts for a putative...
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Báo cáo khoa học: "Hepatic Cobalt and Copper Levels in Lambs in Norway" docx
... the statistical significance of the differences Unless stated otherwise, the limit of statistical significance was set at p
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Báo cáo y học: " Wild-type and central DNA flap defective HIV-1 lentiviral vector genomes: intracellular visualization at ultrastructural resolution levels" doc
... Distilled water Tris HCl, 10 mM, pH 7.3 Distilled water 15 hr min o/nc 30 37°C 37°C RTd 95°C 37°C RTd PBS a The aim of this step is to eliminate proteins within the section which could otherwise ... highly statistically significant (p < 0.0001, Mann-Whitney test) and consistent with published intracellular vector DNA profiles assessed by quantitative Southern blotting [4] This is, to our ... DNA Flap is a cis-acting DNA motif that is implicated in HIV-1 nuclear import The inhibition of nuclear import in the absence of this motif, although not absolute, points to a mechanistic implication...
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Báo cáo sinh học: "Genotype by environment interaction for adult body weights of shrimp Penaeus vannamei when grown at low and high densities" ppt
... environments is easily accomplished That is, we consider BW in the low density environment to be a different trait from BW in the high density environment, allowing for the establishment of a ... selection for BW is practiced in this type of environment, a further understanding of the effects on genetic correlations of BW with other traits within this type of environment is necessary In ... corresponding unknown fixed effects, gj is modeled as the additive genetic, polygenic contribution to BW, and ej is the corresponding unknown residual The distribution of the unobservable additive...
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Tìm thêm: khảo sát các chuẩn giảng dạy tiếng nhật từ góc độ lí thuyết và thực tiễn khảo sát chương trình đào tạo gắn với các giáo trình cụ thể xác định thời lượng học về mặt lí thuyết và thực tế điều tra đối với đối tượng giảng viên và đối tượng quản lí điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 khảo sát các chương trình đào tạo theo những bộ giáo trình tiêu biểu nội dung cụ thể cho từng kĩ năng ở từng cấp độ xác định mức độ đáp ứng về văn hoá và chuyên môn trong ct phát huy những thành tựu công nghệ mới nhất được áp dụng vào công tác dạy và học ngoại ngữ mở máy động cơ rôto dây quấn các đặc tính của động cơ điện không đồng bộ hệ số công suất cosp fi p2 đặc tuyến mômen quay m fi p2 đặc tuyến tốc độ rôto n fi p2 đặc tuyến dòng điện stato i1 fi p2 động cơ điện không đồng bộ một pha sự cần thiết phải đầu tư xây dựng nhà máy phần 3 giới thiệu nguyên liệu từ bảng 3 1 ta thấy ngoài hai thành phần chủ yếu và chiếm tỷ lệ cao nhất là tinh bột và cacbonhydrat trong hạt gạo tẻ còn chứa đường cellulose hemicellulose chỉ tiêu chất lượng theo chất lượng phẩm chất sản phẩm khô từ gạo của bộ y tế năm 2008