the chemistry of powder explosives
The chemistry of nanostructured materials
... structures. The metal cation in the center of the porphyrin ring is also coordinated to pyridyl groups of other tpp complexes, allowing the creation of an extended layer structure without the use of ... Figure 4, the first step in the formation of mesoporous Nb2O5, which takes place in the absence of water is the formation of a Nb-N covalent bond between the precursor Nb(OEt)5 and the long-chain ... condensation of these species in the presence of water leading to the formation of cylindrical micelles, and ultimately to a mesophase (route a’, b’ in Figure 4). Alternatively, the formation of the...
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THE CHEMISTRY OF MILK pptx
... temperature, the iodine value is largely a measure of the oleic-acid content and thereby of the softness of the fat. The iodine value of butterfat normally varies between 24 and 46. The variations ... those of κ-casein arereadily soluble. Due to the dominating localisation of κ-casein to the surface of the micelles, the solubility of calcium κ-caseinate prevails over the insolubility of the other ... formed. The protein is then precipi-tated from the solution. The pH at which this happens is called the isoelec-tric point of the protein.In the presence of an excess of hydrogen ions the molecules...
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THE CHEMISTRY OF DRUG DELIVERY SYSTEMS (hoá học các hệ dẫn truyền thuốc)
... in the membrane Similarity of structure to phospholipid membranes in living cells Avoid the hydrolytic degradation of drugs in water Reduce the RES uptake due to the rapid clearance of ... concentrations of 30-50 mol% almost non-polar increase hydrophobic interactions in the phospholipid bilayers drecrease the fluidity of the membrane OBJECTIVES On the completion of this ... the answers to the questions. Students will receive a publication on drug delivery system at least one week before the day of the exam. The exam questions will be based on the given article....
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new developments in the chemistry of war gasses 1950
... out on the preparation of these compounds led to the discovery of many interesting substances and to the development of several new methods of synthe- sis. In addition, the results of the toxicological ... branching of the chain at the carbon atom adjacent to the oxygen appears to confer higher toxicity than branching at the end of the chain. (b) Replacement of the fluorine atom by another substituent, ... comparable to that of hydrogen cyanide. The toxicity of some of these fluophosphates is higher than that of phosgene. Their vapors have a pronounced effect on the eyes. Although there is no tear...
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Gián án Chapter 22 Chemistry of the Nonmetals
... some of the lattice sitesãSiO2 becomes AlO2ã the negative charge is countered by the inclusion of a cationAlbite = ẳ of Si replaced by Al; Na(AlO2)(SiO2)3Anorthite = ẵ of Si ... form of carbon that is a component of soot used as rubber strengthener 7Silicatesã the most abundant elements of the Earths crust are O and Siãsilicates are covalent atomic solids of ... coal in the absence of air forms cokecarbon and ashãheating wood in the absence of air forms charcoalactivated carbon is charcoal used to adsorb other moleculesãsoot is composed of hydrocarbons...
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Tài liệu Báo cáo khoa học: Coordination chemistry of iron(III)±porphyrin±antibody complexes In¯uence on the peroxidase activity of the axial coordination of an imidazole on the iron atom ppt
... occurs in the case of 13G10±Fe(ToCPP) on the less hindered face of the porphyrin, close to the catalytic COOH residue, whereasin the case of 13G10±Fe(DoCPP) it can occur on the otherface of the porphyrin. ... (Table 1). The bind-ing of the ®rst CN±ligand to the iron was thus more easy in the hydrophobic binding pocket of the antibody than the binding of the second one, most probably because of the steric ... shown). This showsthat the binding of the two cyanide ligands to the ironatom of 13G10±Fe(ToCPP) actually occurred inside the binding pocket of the antibody. The value of the dissoci-ation constant...
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ag doped wo3-based powder sensor for the detection of no gas in air
... monitor the concentration of NO and NO2gases because of the lowconcentration, one of the roles of the Ag is apparent toprovide surface for the conversion of NO to NO2accordingto the literature ... (collected from the impedance at 0.5 Hz) of the material decreased atincreasing temperature, thus the observation is consistentwith the semiconducting behavior of the material. The resistance of our ... include creation of these defective sites on the WO3at and near the interfacebetween the small Ag particles and the bulk WO3particles asindicated by the present XRD and the TEM results....
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the chemistry and technology of gypsum asymposium astm special technical publication stp
... pro-nounced for the major elements, expressed as CaO and SO,. These two elements comprise on average 80 to 98% of the total sum of the analyzed elements in anhydrite; therefore the precision of their ... beam of white light is split into a rainbow of colors by a prism. The dispersion of the liquid is rarely the same as the solid. Therefore, although one wavelength of light may match up, others ... both setting characteristics of the stucco and, as a result, on the strength of the gypsum formed. The objective of the work described in this paper was to study the relationships between...
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