synthesis of superheavy elements

Ngày tải lên: 05/09/2013, 14:58

... diameter of contact ellipse along x axis, m D y diameter of contact ellipse along y axis, m d diameter of rolling element or diameter of journal, m d a overall diameter of ball ... bore diameter of ball bearing, m d c diameter of capillary tube, m df inner-race diameter of ball bearing, m d 0 outer-race diameter of ball bearing, m d 0 diameter of orifice, ... middle of this century two distinct regimes of lubrication were generally recognized. The first of these was hydrodynamic lubrication. The development of the understanding of this...

Ngày tải lên: 27/01/2014, 16:20

... minimum value of H f occurs at a ratio of recess radius to bearing radius R 0 IR of 0.53. All bearing-pad configurations exhibit minimum values of H f when their ratios of recess ... establishing the definition of c b . The preload factor m p is given by c - c b m = p c A preload factor of zero corresponds to having all of the pad centers of curvature coinciding ... the center of the bearing; a preload factor of 1.0 corresponds to having all of the pads touching the shaft. Figures 2l.l6b and 21.16c illustrate these extreme situations. Values of...

Ngày tải lên: 27/01/2014, 16:20

... (^)'' 8 where d = diameter of rolling element, m / = number of rows of rolling elements n = number of rolling elements per row (3 = contact angle f c = coefficient dependent ... a range of nearly two orders of magnitude, and the dimensionless load parameter W over a range of one order of magnitude. Situations equivalent to using materials of bronze, ... map of the lubrication regimes in the form of dimensionless minimum-film-thickness parameter contours. Some of these maps are shown in Figs. 21.72-21.74 on a log-log grid of the ...

Ngày tải lên: 27/01/2014, 16:20

... effectively because a growing number of managers are computer literate and understand many of the basic hardware/software requirements of smaller agencies. More often this approach is unsuccessful ... their questionnaries. A profile of these two systems may provide insight into the state of the practice of representative transit agencies. The questionnaries are included in this synthesis as Appendixes ... contains the definitions of the business entities, and an English description of the relationships between them, cardinality of the relationships and identification of the unique identifiers. geographical...

Ngày tải lên: 18/02/2014, 11:20

... the mechanisms of incorporation of PTMs in the biosynthesis of conopeptides. Appropriate methods of analysis need to be addressed to ensure recognition of these PTMs, if present, in the course of characterization ... the structure of the naturally occurring peptide. However, the limitation of scarcity of most conopeptides usually precludes this. The possibility of activity of non-native disulfide- bonded isomers of a-conotoxins ... identification of the PTM is usually confirmed by synthesis of the modified a-conotoxin and comparison with the natural peptide. Identification of the nature of the C-terminus. The identification of C-terminal...

Ngày tải lên: 19/02/2014, 12:20

Ngày tải lên: 19/02/2014, 15:20

... explanation of the dependency structure T: m(T ) : the number of verbs in T v i (T ) : the i-th verb in T c i (T ) : the number of case elements that mod- ify the i-th verb in T es i (T ) : the set of ... of case elements that modify the i-th verb in T rs i (T ) : the set of particles in the set of case el- ements that modify the i-th verb in T ns i (T ) : the set of nouns in the set of case ele- ments ... accuracy of model (d) is comparable to that of our model, we can conclude that the con- sideration of the syntactic property of a verb does not necessarily improve dependency analysis. The accuracy of...

Ngày tải lên: 20/02/2014, 12:20

... for the preparation of C-6 aldehyde derivatives of Glc [15]. The key step is the use of Collins reagent for the selective oxidation of the primary trimethyl- silyl ether of the fully silylated ... con- sumption of NADH in the presence of L -lactate dehydro- genase, but also formation of NADPH in the presence of Glc6P dehydrogenase. This background activity must therefore be due to phosphorylation of ... 0.13 g of 14 [37]. The epoxide 14 (50 mg, 0.1 mmol) was debenzylated in 30 min by following the same method as for 1d.23mgofa1:1 diastereomeric mixture of 3a was obtained. Preparation of chloroacetyl...

Ngày tải lên: 21/02/2014, 01:21

... doi:10.1046/j.1432-1033.2002.03253.x Relative activity of Gp n Gs as effectors of the synthesis of poly(A) Based on the above results, the effect of several diguanosine polyphosphates on the synthesis of poly(A) was comparat- ively ... independent synthesis of poly(A) In order to understand why dinucleoside polyphosphates activated the primer independent synthesis of poly(A), the effect of 0.01 m M Gp 4 GorAp 4 A on the synthesis of poly(A) ... presence of 0.02 m M [a- 32 P]ATP. While confirming the adenylylation of these compounds and the absence of synthesis of poly(A) by the E.colipoly(A) polymerase, we did not observed adenyly- lation of...

Ngày tải lên: 21/02/2014, 01:21

... the latter. Heterologous synthesis of PHCP by E. coli The E. coli System I cytochrome c biogenesis machin- ery, consisting of the Dsb and Ccm proteins, is respon- sible for the synthesis of class I cytochromes ... and propagation of all plasmids. The E. coli RI89, RI242 and JCB387 strains were examined with regard to the synthesis of exogenous PHCP and PH c 552 proteins. The RI89 strain is a parental strain of RI242, ... plasmid. In addition, the effects of Dsb proteins on cytochrome c synthesis have not been examined to date. In this study, we examined the heterologous synthesis of cytochrome c proteins by E....

Ngày tải lên: 06/03/2014, 00:20

... Services. In Nicaragua, the Ministry of Environment and Natural Resources (MARENA) has an Office of Environmental Services that is in charge of identifying the benefits of trade in environmental goods ... in all of the studies is that information and data about the EG&S market are hard to come by. For most authors, the lack of appropriate statistics makes the assessment of the size of domestic ... or no examples are given. Imports of EG&S Many of the studies include figures for imports of EG&S. Interestingly, EG&S imports account for 5- 10% of total imports in each country,...

Ngày tải lên: 07/03/2014, 08:20

... characterization of l-gulonolactone oxidase from chicken kidney microsomes. Biochemistry 21, 5076– 5082. 14 Loewus FA (1999) Biosynthesis and metabolism of ascorbic acid in plants and of analogs of ascorbic ... the synthesis of vitamin C, L-gulono-1,4-lactone dehydrogenase Beata A. Wolucka 1 and David Communi 2 1 Laboratory of Mycobacterial Biochemistry, Pasteur Institute of Brussels, Institute of Public ... distinct member of the family of l-gulono-1,4-lactone dehydrogenase ⁄ oxidases that have been characterized up to now, and the first example of a specific, vitamin C biosynthetic enzyme of bacterial...

Ngày tải lên: 07/03/2014, 12:20

... biosynthesis of glycosaminoglycan in mammals and of cell wall polysaccharides in plants. Given the importance of these glycans to some organisms, the development of a system for production of ... Jigami Synthesis of UDP-glucuronic acid and UDP-xylose FEBS Journal 273 (2006) 2645–2657 ª 2006 The Authors Journal compilation ª 2006 FEBS 2653 Reconstruction of de novo pathway for synthesis of UDP-glucuronic ... efficient production of UDP-GlcA and UDP-Xyl via conversion of a large precursor pool of UDP-Glc into the derivative molecules. Here, we report the generation of yeast strains capable of produ- cing...

Ngày tải lên: 07/03/2014, 12:20

... epistasy of synthesis (CES) process [1], D1 and apoCP47 display concerted rates of synthesis. In the absence of D1, the rate of synthesis of apoCP47 is strongly reduced, while the rates of synthesis of ... in mf1 and mf2 is due to a decreased synthesis of two PSII core subunits The strongly reduced accumulation of PSII could result from a defect in the synthesis of any of the major PSII core subunits ... attributed to a higher susceptibility of the cores to proteolytic degradation or to their lower rate of synthesis. When we studied the rates of synthesis of the individual PSII subunits by 5 min...

Ngày tải lên: 07/03/2014, 15:20

... extra- ordinarily diverse range of phenomena including the frequency of the use of words in human lan- guage (Zipf, 1949), the number of papers scien- tists write (Lotka, 1926), the number of hits on web pages ... of Figure 3(b) comprises of the rest of the consonants. The point marked as x in both the figures indicates the breakpoint. Each of the regime in both Figure 3(a) and (b) exhibit a power law of ... the y-axis denotes the number of nodes having a given degree expressed as a fraction of the total number of nodes in V L . It is evident from Figure 2 that the number of consonants appearing in...

Ngày tải lên: 08/03/2014, 02:21

Ngày tải lên: 08/03/2014, 04:22

Ngày tải lên: 08/03/2014, 08:20

Ngày tải lên: 14/03/2014, 13:20

Ngày tải lên: 15/03/2014, 01:27