Insights into solid phase characteristics and release of heavy metals and arsenic from industrial sludge via combined chemical, mineralogical, and microanalysis

Tài liệu Báo cáo khoa học: Crystal structure of the cambialistic superoxide dismutase from Aeropyrum pernix K1 – insights into the enzyme mechanism and stability pdf

Tài liệu Báo cáo khoa học: Crystal structure of the cambialistic superoxide dismutase from Aeropyrum pernix K1 – insights into the enzyme mechanism and stability pdf
... illustrates the superimposition of ApeSOD with the cambialistic SOD from P shermanii The overall structures of these enzymes were similar; the rmsd of the 747 Ca atoms was ˚ 0.695 A ApeSOD eluted from the ... superoxide dismutases Biochim Biophys Acta 1804, 24 5–2 62 Crystal structure of SOD from A pernix K1 Sugio S, Hiraoka BY & Yamakura F (2000) Crystal structure of cambialistic superoxide dismutase from ... inhibition of the binding of the superoxide substrate and the other to product inhibition by hydrogen peroxide There are two mechanisms proposed for the reaction cycle of Mn ⁄ Fe-SOD: the 5-6-5 mechanism...
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Tài liệu Báo cáo khoa học: Solution structure of hirsutellin A – new insights into the active site and interacting interfaces of ribotoxins docx

Tài liệu Báo cáo khoa học: Solution structure of hirsutellin A – new insights into the active site and interacting interfaces of ribotoxins docx
... interactions established in the active site is also of relevance The active site: structural and electrostatic basis of HtA function The reaction catalyzed by ribotoxins follows a mechanism of transphosphorylation, ... Pozo A & Gavilanes JG (2001) RNase U2 and alphasarcin: a study of relationships Meth Enzymol 341, 33 5–3 51 ´ Lacadena J, Alvarez-Garcı´ a E, Carreras-Sangra N, ´ Herrero-Galan E, Alegre-Cebollada ... Desolvation of the charged groups should affect their pKa values, increasing the pKa of carboxylates and decreasing the pKa of histidines [24] Structurally, the architecture of the active site in HtA is...
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Báo cáo khoa học: Recent insights into cerebral cavernous malformations: animal models of CCM and the human phenotype pptx

Báo cáo khoa học: Recent insights into cerebral cavernous malformations: animal models of CCM and the human phenotype pptx
... function and lesion biology By exploring the function of the CCM genes in animal models this gap is being CCM animal models bridged Animal models have demonstrated the central importance of endothelial ... increase in both the intracerebral hemorrhage phenotype of rap1b and the cardiac developmental phenotype of san The zebrafish experiments demonstrate the role of the CCM genes in cardiac and vascular ... further understand the human phenotype Recent investigations have further refined our understanding of this phenotype, and bear reviewing in this manuscript In human CCM disease, the lesions exhibit...
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Solid phase synthesis and biological evaluation of 1, 3, 5 triazine derivatives

Solid phase synthesis and biological evaluation of 1, 3, 5 triazine derivatives
... 1,3 ,5- Triazine Derivatives 11 1.2.2 Synthesis of 1,3 ,5- Triazine Derivatives 14 1.2.2.1 Solution phase synthesis of 2,4,6-trisubtituted -1,3 ,5- triazine 14 1.2.2.2 Solid- Phase Synthesis of 1,3 ,5- Triazine ... 65 3.4 Synthesis of 1,3 ,5- triazine Analogs via Guanidium Azolides 80 3 .5 Synthesis of 1,3 ,5- traizine-2,4-diones 3-17 81 3 .5. 1 Solution -Phase synthesis of 3-17 81 3 .5. 2 Solid- Phase Synthesis of ... the synthesis of 1,3 ,5- triazine, 7476 this section will concentrate on the recent solution -phase and solid- phase syntheses of the 1,3 ,5- triazine derivatives 1.2.2.1 Solution phase synthesis of...
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Báo cáo Y học: Functional expression of human liver cytosolic b-glucosidase in Pichia pastoris Insights into its role in the metabolism of dietary glucosides ppt

Báo cáo Y học: Functional expression of human liver cytosolic b-glucosidase in Pichia pastoris Insights into its role in the metabolism of dietary glucosides ppt
... hydrolyse glycosides to release the (bioactive) aglycone in the small intestine The purpose of this study was to determine whether the human cytosolic b-glucosidase could function to deglycosylate ... from human liver Furthermore, we investigated the speci®city of the human CBG with respect to the glycone and aglycone moieties, and in particular characterized the ef®ciency of the enzyme in hydrolysing ... 4NP-b-Dglucopyranoside (10 mM) was reduced by 98% in the presence of 4NP-b-D-mannopyranoside (10 mM)] Hydrolysis of xenobiotic glycosides by reCBG The ability of CBG to hydrolyse a variety of glucosides...
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Báo cáo hóa học: " Influences of phase transition and microstructure on dielectric properties of Bi0.5Na0.5Zr1-xTixO3 ceramics" potx

Báo cáo hóa học:
... Influences of phase transition and microstructure on dielectric properties of Bi0.5Na0.5Zr1-xTixO3 ceramics Panupong Jaiban1, Ampika Rachakom1, Sukanda Jiansirisomboon1,2, and Anucha ... that evaporation of Na and Bi might occur which often resulted in a formation of a second phase and compositional inhomogeneity Similarly, several investigations also found the mentioned loss leading ... higher dielectric loss This study therefore showed that compositional variation in these new BNZT solid solutions affected the crystal structure, phase transition, microstructure, and dielectric properties...
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báo cáo hóa học:" Influences of phase transition and microstructure on dielectric properties of Bi0.5Na0.5Zr1-xTixO3 ceramics" pptx

báo cáo hóa học:
... al.: Influences of phase transition and microstructure on dielectric properties of Bi0.5Na0.5Zr1-xTixO3 ceramics Nanoscale Research Letters 2012 7:45 Author details Department of Physics and Materials ... of 1, 10, and 100 kHz Jaiban et al Nanoscale Research Letters 2012, 7:45 http://www.nanoscalereslett.com/content/7/1/45 Page of phase transition, microstructure, and dielectric properties Conclusions ... Influence of zirconia addition on the microstructure of K0.5Na0.5NbO3 ceramics J Eur Ceram Soc 2008, 28:1191-1196 Zhang SW, Zhang H, Zhang BP, Yang S: Phase- transition behavior and piezoelectric properties...
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Distribution and mobility of heavy metals

Distribution and mobility of heavy metals
... covered by trees and spontaneous plants The land in the zone is made of alluvial deposits The top layer of the soil, down to a depth of from 0.6 to m, is composed of sand with silt and clay, with ... made of sand and silt Groundwater flows at a depth of about m The contaminated area, whose estimated extension and volume are 5000 m2 and 17,000 m3 respectively, is made up of a mixture of industrial ... One of the pieces of material analysed (A15) has concentrations similar to ones of the relief, whereas the other (A16) has a very high copper level and low content of Fe and of La, Sc, Ti, V and...
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Effect of metal spiking on different chemical pools and chemically extractable fractions of heavy metals

Effect of metal spiking on different chemical pools and chemically extractable fractions of heavy metals
... Based upon the changes in different chemical pools of heavy metals in sludge due to metal spiking and incubation, it appeared that bio-oxidation of organic carbon and consequent acidification effected ... **, * and NS indicate significance at P = 0.01, 0.05 and non-significant difference between pairs, respectively 3.3 Effect of metal spiking and incubation on chemical pools Heavy metal spiking and ... of toluene was 3.2 Chemical pools of heavy metals Among various chemical pools, major portion of metals in unspiked sludge occurred in the residual fraction (F5 ) followed by F3 , F2 , F4 , and...
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Removal of heavy metals from wastewater using agricultural and industrial wastes as adsorbents

Removal of heavy metals from wastewater using agricultural and industrial wastes as adsorbents
... simultaneous removal of Fe, Pb and Ni, whereas fly ash was effective in the removal of Cd and Cu It was found that the percentage removal of heavy metals was dependent on the dose of low cost adsorbent and ... Cd removal using rice husk increased from 26.04% to 67.917% i.e with the increase of the amount of absorbent concentration, while the Cd removal using fly Ash varied from 25.21% to 73.54% Case of ... Reviews of some agricultural and industrial adsorbents for the removal of heavy metals from wastewater are presented as follows Rice husk Rice husk is an agricultural waste material generated in rice...
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Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 2 pps

Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 2 pps
... composition [24 28 ] However, in many cases the generally higher binding energies of trace metals to mineral- rather than organic-colloid surfaces may render high-surface-charge mineral colloids ... (Table 2. 1) may have also enhanced their stability and transportability Settling rate experiments (Figure 2. 2) indicated a decline in the concentration of kaolinitic colloids remaining in suspension ... couplings and reactivity modifications of permanent charge phyllosilicates and variable charge Fe-oxyhydroxide phases [30] Furthermore, information on contaminant–mineral interactions and colloid-mediated...
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Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 4 docx

Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 4 docx
... protons in the bulk The combination of equations 4. 2 and 4. 3 gives int K H e − Fψ / RT = ΓAH ΓA aH (4. 4) int In dilute solutions K H is independent of the electric potential, and is called the intrinsic ... unraveling the affinity of mineral surfaces for both inorganic and organic species The main effects of proton adsorption-desorption on the adsorption of metals in general and heavy metals in particular ... FIGURE 4. 5 Clay surface with accepting and donating H bonds TABLE 4. 1 int LogK H of Different Groups at Clay Surfaces According to Modified MUSIC Model Group Si2-O Si2-OH Si-O Si-OH Al-O Al-OH Al2-O...
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Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 5 pptx

Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 5 pptx
... 10 75 10 45 1 655 1634 156 4 1487 1449 1426 1281 1261 1187 1136 1086 1039 1023 1688 1647 16 05 158 1 154 0 1493 14 75 13 75 1362 1293 1274 1 158 1 050 159 2 157 1 155 3 1466 1448 14 25 1360 1293 1280 12 45 1 153 ... 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 Iarlori, S et al., Dehydroxylation and silanization of the surfaces of beta-cristobalite silica: An ab initio simulation, J Phys Chem B, 1 05, ... 1692 16 05 158 5 14 95 1 451 1412 1319 1284 1212 1178 1069 1027 1002 1003 a b 159 8 157 6 1484 1 457 1439 1313 1314 1 251 1164 1114 1014 991 974 966 1603 159 5 155 5 14 95 1417 1400 1310 12 75 11 75 1160 1104...
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Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 7 pptx

Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 7 pptx
... pH (Adams and Ghiorse, 19 87) Recent investigations of the molecular biology of Mn-oxidizing bacteria have implicated copper-containing enzymes in Mn(II) oxidation Multi-copper oxidase enzymes have ... Cosmochimica Acta, and Limnology and Oceanography REFERENCES Adams, L.F and Ghiorse, W.C., Characterization of extracellular Mn2+-oxidizing activity and isolation of an Mn2+-oxidizing protein from Leptothrix ... comparison of the Sargasso Sea and equatorial Pacific, Deep Sea Res Part I Oceanogr Res Pap., 44, 1 277 , 19 97 Moffett, J.W and Ho, J., Microbially mediated incorporation of trace-elements into manganese...
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Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 8 ppsx

Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 8 ppsx
... techniques, including XRD, XAFS, and micro-focused XAFS to demonstrate that upon weathering of Zn-mineral phases in soils, Zn was taken up by the formation of Zn-containing phyllosilicates and, to ... sources, µ-EXAFS has been used to speciate metals in soils and sediments.30,31,64,65 8. 2.4 ADVANTAGE OF COMBINING TECHNIQUES In this brief overview of the approaches to speciation of metals in soils, ... identity of the ligands surrounding the target element, specific bond distances, and coordination numbers of first- and second-shell ligands.53 This information is extremely useful in speciation of metals...
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