the chemistry of powder explosives
The chemistry of nanostructured materials
Ngày tải lên :
23/04/2013, 20:25
... 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 Nb
2
O
5
, 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
Ngày tải lên :
08/03/2014, 23:20
... 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 are
readily 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)
Ngày tải lên :
18/04/2014, 15:37
... 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
Ngày tải lên :
09/05/2014, 17:01
... 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
Ngày tải lên :
28/11/2013, 01:12
... some of the lattice sites
ã
SiO
2
becomes AlO
2
ã
the negative charge is countered by the inclusion
of a cation
Albite = ẳ of Si replaced by Al; Na(AlO
2
)(SiO
2
)
3
Anorthite = ẵ of Si ... form of carbon that is a component of
soot
used as rubber strengthener
7
Silicates
ã
the most abundant elements of the Earths crust
are O and Si
ã
silicates are covalent atomic solids of ... coal in the absence of air forms coke
carbon and ash
ã
heating wood in the absence of air forms charcoal
activated carbon is charcoal used to adsorb other molecules
ã
soot is composed of hydrocarbons...
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