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the chemistry of explosives

The chemistry of nanostructured materials

The chemistry of nanostructured materials

Hóa học - Dầu khí

... 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

THE CHEMISTRY OF MILK pptx

Cao đẳng - Đại học

... 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)

THE CHEMISTRY OF DRUG DELIVERY SYSTEMS (hoá học các hệ dẫn truyền thuốc)

Hóa học

... 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

new developments in the chemistry of war gasses 1950

Hóa học - Dầu khí

... 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

Gián án Chapter 22 Chemistry of the Nonmetals

Hóa học

... some of the lattice sites•SiO2 becomes AlO2−• the negative charge is countered by the inclusion of a cationAlbite = ¼ of Si replaced by Al; Na(AlO2)(SiO2)3Anorthite = ½ of Si ... form of carbon that is a component of soot used as rubber strengthener7Silicates• the most abundant elements of the Earth’s crust are O and Si•silicates are covalent atomic solids of ... coal in the absence of air forms cokecarbon and ash•heating wood in the absence of air forms charcoalactivated carbon is charcoal used to adsorb other molecules•soot 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

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

Báo cáo khoa học

... 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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the chemistry and technology of gypsum asymposium astm special technical publication stp

the chemistry and technology of gypsum asymposium astm special technical publication stp

Hóa học - Dầu khí

... 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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the chemistry and technology of petroleum,3rd edition

the chemistry and technology of petroleum,3rd edition

Hóa học - Dầu khí

... evolu-tion with the inclusion of chapters on the structure of petroleum and the development of newtechnologies for refining the heavier feedstocks. The success of the first and second editions of this ... feature of residua and the heavier oils. Furthermore, the deeper the cut into the crude oil, the greater is the concentration of sulfur and metals in the residuum and the greater the deteriora-tion ... residence of the vapor in the heated zone.Treatment of the distillate (boiling up to 250°C, 480°F) of the tar with caustic soda causesseparation of a fraction known as tar acids; acid treatment of the...
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