c7h8 • and c8h8 • ions
Tài liệu Báo cáo khoa học: Insights into the interaction of human arginase II with substrate and manganese ions by site-directed mutagenesis and kinetic studies Alteration of substrate specificity by replacement of Asn149 with Asp docx
... S-(2-boronoethyl)-l-cysteine (BEC) His120 and His145, and the corresponding His101 and His126 in arginase I, were described among the ligands for coordination of Mn2+A and Mn2+B, respectively [9,24] However, ... arginase I and Mn2+B in arginase II Because ligands to the metal ions are strictly conserved in these enzymes, the difference would reside in the length of the ligand– metal separations In this ... experimental and computational methods, will be initiated soon in our laboratory General conclusions In addition to substantiate the participation of His120 and His145 as ligands for the manganese ions...
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Báo cáo khoa học: Effects of sphingomyelin, cholesterol and zinc ions on the binding, insertion and aggregation of the amyloid Ab1)40 peptide in solid-supported lipid bilayers ppt
... important for raft membranedependent aggregation and neurotoxic action, in particular the presence of sphingomyelin, cholesterol and zinc ions Results and Discussion In order to characterize the interaction ... layer before and after binding of peptide and subsequent aggregation, and of the layer composed of peptide (or a portion of the peptide) that extends beyond the lipid surface Both p- and s-polarized ... b-sheet, and even smaller amounts of a-helix [41] We therefore assume that the peptide layer on the DOPC and SM membrane surface consists of such a mixture of oligomers and secondary conformations...
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The influence of NO 3 −, CH3COO−, and cl− ions and the morphology of calcium hydroxyapatite crystals
... obtained Different sizes and shapes of the crystals can be explained by different interactions of hydroxyapatite with the anions of the initial salts: adsorption of acetate anions on the HA surface, ... chloride ions for the hydroxyl groups of HA, and “inertness” of nitrate anions The thermal treatment of the samples at 500–1100°C for h led to the formation of faceted crystallites and an increase ... groups (up to wt %) [3] The presence of the absorption bands of nitrate and acetate groups can be explained by adsorption of the corresponding ions on the surface of HA crystals Further annealing...
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Investigation on K2Ti4O9 Whisker Absorbent and Applications in Heavy Metal Ions Removal
... Water and Environment Technology, Vol.5, No.1, 2007 RESULTS AND DISCUSSION Absorption behavior of PTW Fig shows the relationship between the quantity of PTW and the adsorption efficiency of Pb2+ and ... of the metallic ions in water, as the quantity of absorbent (PTW) increases, the active sites of the absorbent increases, which results in more metallic ions absorbed and less ions remain in water ... the ion size and the separation coefficient of PTW on these two ions [3] - 14 - Journal of Water and Environment Technology, Vol.5, No.1, 2007 The effect of time on absorption of Pb2+ and Cd2+ on...
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Báo cáo khoa học: Metal ions modulate the folding and stability of the tumor suppressor protein S100A2 docx
... a study of the apo and Ca2+-loaded forms of DCys-S100A In both conditions, denaturation consisted of transition from a-helical ( 1650 and 1550 cm)1) to random (1525 cm)1) and b-structures ( ... effects of metal ions on S100A2 folding and stability contribute to a better understanding of the Ca2+- and Zn2+-dependent regulation of the protein In the Ca2+-loaded state, S100A2 binds and activates ... of a-helix proteins, with local minima at 208 and 222 nm and local maxima at 195 and 215 nm, in agreement with the DCys-S100A2 crystal structure [8] and other C 10 –1 –1 –2 –2 –2 –3 –4 –3 –4 190...
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Báo cáo khoa học: b-Amyloid protein oligomers induced by metal ions and acid pH are distinct from those generated by slow spontaneous ageing at neutral pH docx
... non-SDS/PAGE was strongly inhibited by Zn2+ and Cu2+, weakly inhibited by Ca2+ and Fe2+ and largely unaffected by Mg2+ Effect of pH and metal ions – CR binding and sedimentation analysis Because of ... solutions containing Zn2+ and Cu2+ decreased rapidly indicating that the induced aggregates were unstable and dissociated after chelation of the metal ions A further addition of 10 mM Zn2+ and ... Solutions were vortexed briefly and then incubated at room temperature for 15 Absorbance values at 403 and 541 nm were recorded for samples and CR alone preparations using a Bio-Rad SmartSpec...
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Báo cáo lâm nghiệp: "Effects of the clear-cutting of a Douglas-fir plantation (Pseudotsuga menziesii F.) on the chemical composition of soil solutions and on the leaching of DOC and ions in drainage waters" pps
... significant correlations were observed between the concentration of nitrate and cations for all the soil layers Correlations between concentrations of SO2− and cations were generally lower and failed ... Changes in concentrations of gravitational solutions at 15, 30, 60 and 120 cm depth (cations: Al3+ , Ca2+ , Mg2+ , NH+ , and anions: NO− , SO2− : left scale, DOC: right scale), before and after clear-cutting ... 4.7 under forest-floor to 4.4 at 120 cm Correlations between concentrations of SO2− and cations were generally weaker than between nitrate and cations as presented in Table IV The general trend...
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Báo cáo lâm nghiệp: "Response of shoot growth and gas exchange of Picea abies clones to rain acidity and the addition of ions" ppt
... acidity and the addition of the ionic mix- ture The effect of acidic rain on the Gn of clone 1019 seemed to depend upon envi- ronmental and/ or ecophysiological conditions (interaction pH x ions ... (acidic) pre- cipitation treatment Acknowledgments Discussion and Conclusion The reduction of CER and Gn at pH 4.0 + and the significant pH x ions interaction suggest a synergism between increasing ... affected: no significant effect of pH, ions or any interaction was observed Clone 1011 showed a reduced Gn at pH water vapor + 4.0 and a significant interaction of pH x ions The Newman-Keuls test yielded...
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Báo cáo khoa học: "In vitro characterization of cells derived from chordoma cell line U-CH1 following treatment with X-rays, heavy ions and chemotherapeutic drugs" pdf
... LET heavy -ions A) X-rays and carbon -ions (LET 13, 30, 50, and 70 keV/μm), B) X-rays and neon -ions (LET 13, 70, and 120 keV/μm), C) X-rays and silicon -ions (LET 55, 150, and 250 keV/μm), and D) X-rays, ... carbon -ions, black triangle; neon -ions, black diamond; silicon ions, white diamond; argon -ions, and white circle; iron -ions Page of control chordoma easily, although the location and the size could be a ... radiations (X-rays, carbon -ions 13 keV/μm, carbon -ions 70 keV/μm, iron -ions 200 keV/ μm) Because of long cellular doubling time, the colony size of U-CH1-N was generally smaller than HeLa and U87...
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Development of multifunctional membranes for visual detection and adsorptive removal of heavy metal ions from aqueous solutions
... individual Hg(II) and HA solutions; sequential adsorption and filtration of individual Hg(II) and HA solutions; co-adsorption and co-filtration of solutions containing both Hg (II) and HA The results ... detection and removal of heavy metal ions was feasible and achievable The prepared multifunctional membranes can detect and remove heavy metal ions in a wide variation of solution conditions, and the ... detection and removal of heavy metal ions in aqueous solutions Lead (Pb), mercury (Hg) and cadmium (Cd) were selected as the target ions due to their high occurrence in industrial wastewaters and high...
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Monte carlo simulation of molecules and ions in liquid water
... Regardless, magnetic interactions due to both electronic and nuclear spin are generally too small to be considered in the context of intermolecular forces, and they are often safely and reasonably neglected ... qeometry onversions for multipole moments F F F F F F F F F F F F F PIR fFQ ghnging the origin of multipole moments F F F F F F F F F F F F F F F PIS C Interaction functions D Program and Auxiliary ... funtions when wonte grlo simultions re performedF he intertion phenomen etween two moleulesD whether overll hrged or unhrgedD n e seprted into the following ontriutions...
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Experimental apparatus for control and manipulation of molecular ions
... plane (Figure 2.2) where the amplitudes of ion oscillations are limited along both x and y directions In this region ions are stable in the trap and the oscillating electric field provides the confinement ... with residual background gas would shorten the trapping time, heat up ions and induce chemical reactions between trapped ions and background gas The pressure in our vacuum chamber is as low as 1×10−11 ... dependency on proton and electron masses (e.g., rotational and vibrational states) • Ultracold chemistry At ultralow temperatures, some novel quantum effects might arise in chemical reactions [14] It...
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INTERACTION STUDIES BETWEEN IONS AND PROTEINS AT PHYSIOLOGICALLY RELEVANT CONCENTRATIONS
... functions ranging from neural development (Flanagan and Vanderhaeghen, 1998; O’Leary and Wilkinson, 1999; Xu et al 1999) to pattern formation and morphogenesis (Holder and Klein, 1999; Schmucker and ... of the interactions between anions and unstructured proteins; To study the characteristics of the interactions between anions and well-folded protein WW4 23 Chapter Materials and Methods 24 2.1 ... curve fitting and data plotting software (Oakdale Engineering) The ions were treated as ligand and the protein and the ions form equilibrium: P+L PL Thus at a given set of conditions: [ ][ [ ]...
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Experimental apparatus for control and manipulation of molecular ions
... plane (Figure 2.2) where the amplitudes of ion oscillations are limited along both x and y directions In this region ions are stable in the trap and the oscillating electric field provides the confinement ... with residual background gas would shorten the trapping time, heat up ions and induce chemical reactions between trapped ions and background gas The pressure in our vacuum chamber is as low as 1×10−11 ... dependency on proton and electron masses (e.g., rotational and vibrational states) • Ultracold chemistry At ultralow temperatures, some novel quantum effects might arise in chemical reactions [14] It...
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Membrane development for metal ions and anions separation
... σ and P of various concentrations of CuCl2 and CuSO4 determined from the Spiegler–Kedem equations σ and P of various concentrations of CuCl2 and CuSO4 determined from the Spiegler–Kedem equations ... removal of both cations and anions General conclusions drawn from this thesis are summarized in Chapter Five Inclusive in this ending chapter are some recommendations and suggestions for future ... arsenate and borate ions and typical heavy metal cations, e.g copper ions, reveal that the PBI NF membrane exhibits better rejection performance for various ion removal Their rejections are strongly...
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Study properties and mechanisms adsorption heavy metal ions on materials made from red mud
... of heavy metal ions Cd 2+, Cu2+, Zn2+ and As(V) in water on geothite center - The contents of the thesis shows the close relationship and support between theoretical calculations and experimental ... efficiency of heavy metal ions Cd 2+, Cu2+, Zn2+ and As(V) in water, handle partial source of waste sludge in the extraction and processing of bauxite there was an urgent problem now and in the future ... II: The method and empirical research: 16 pages Chapter III: Findings and discussion: 76 pages Catalog articles and scientific works: pages References pages and 68 references and abroad II CONTENT...
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The effects of chloride ions on the hydrogen gas generation and TCE degradation in aqueous solutions containing zero valent iron
... within the pit and the negative charge outside causes negative halide ions to diffuse into the pit to maintain charge neutrality The halide ions migrate to anodic sites and metal ions hydrolyze, ... chloride ions can increase or decrease the corrosion rate of iron denpeding on their concentrations, and the solution pH According to Podobaev (2005) and Aleksanyan et al (2007), chloride ions can ... contaminated with TCE and nitrate as well as the design of PRB Hydrogen gas generation in the presence of TCE and chloride ions: investigate the effect of TCE and chloride ions on the generation...
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DSpace at VNU: Comparative optical study of Eu3+ ions doping in InGaN GaN quantum dots and GaN layer grown by molecular beam epitaxy
... spectra for emissions at 620, 622, and 633.5 nm (not shown) The PLE spectra are characterised by band-toband absorption at the GaN band gap and a weak absorption tail below band gap down to 400 ... contributions from Eu3+ ions in InGaN QDs and from Eu3+ ions in the GaN barrier layer are superimposed Notice that for Tm doping of GaN QDs grown on AlN the situation is even more complex as Tm3+ ions ... ratios This suggests two contributions of Eu3+ ions to the PL of InGaN:Eu QDs, which come from Eu3+ ions in the InGaN material and in the GaN barriers Note that Eu3+ ions might occupy different sites...
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DSpace at VNU: The photoluminescence enhancement of Mn2+ ions and the crystal field in ZnS:Mn nanoparticles covered by polyvinyl alcohol
... obtained the solutions E, respectively The solutions D and E were mixed and stirred each other for h to receive the solutions F The solution C was putted in the solutions F drop by drop and stirred ... markers, photocatalytic applications and many other applications because they are wide band gap semiconductors with stable and strong PL intensity in the yellow-orange region and high luminescent efficiency ... radiations: 345 (a), 325 (b) and 468 nm (c) 123 The photoluminescence enhancement of Mn2? ions and the… Page 13 of 15 362 Fig 12 The diagram of absorption, radiation transitions of Mn2? ions in...
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Tìm thêm: xác định các mục tiêu của chương trình khảo sát các chuẩn giảng dạy tiếng nhật từ góc độ lí thuyết và thực tiễn xác định thời lượng học về mặt lí thuyết và thực tế tiến hành xây dựng chương trình đào tạo dành cho đối tượng không chuyên ngữ tại việt nam điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 khảo sát thực tế giảng dạy tiếng nhật không chuyên ngữ tại việt nam khảo sát các chương trình đào tạo theo những bộ giáo trình tiêu biểu phát huy những thành tựu công nghệ mới nhất được áp dụng vào công tác dạy và học ngoại ngữ mở máy động cơ lồng sóc 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 thông tin liên lạc và các dịch vụ 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 9 tr 25