báo cáo khoa học: "Blue shift of CdSe/ZnS nanocrystal-labels upon DNA-hybridization" ppt

... [16]. BioMed Central Page 1 of 6 (page number not for citation purposes) Journal of Nanobiotechnology Open Access Research Blue shift of CdSe/ZnS nanocrystal-labels upon DNA-hybridization Jürgen ... surface of the particles was exchanged with mercaptopropionic acid (MPA). 10 ml (0.1 molar) of a solution of MPA in dimethylforma- mide (DMF) were added to solid QDs, precipita...

Ngày tải lên: 11/08/2014, 00:22

... of ingested pathogen Release of digested material by exocytosis Fig. 1. Detailed structure of a macrophage showing a typical process of phagocytosis. Phagosome Lysosome Inhibition of fusion of ... pro- teins of mycobacteria have a profound influence on its pathogenicity. It was found that the disruption of an erp gene of M. tuberculosis encoding a secretory pro- tein effects...

Ngày tải lên: 16/02/2014, 15:20

... the free enzyme. With the exception of a shift of the side chain of Gln69 (constituent of the B 2 subsite) and a movement by  3.0 A ˚ of the Arg85 (the sole compo- nent of the P -1 subsite [12]) side ... similar man- ner to AMP would place the carbonyl O6 of IMP 3.1– 3.5 A ˚ away from Od1 of Asn67, Oe1 of Gln69, and Od1 of Asn71 in the B 2 . At the pH of the crystalli...

Ngày tải lên: 07/03/2014, 21:20

... per- plexity of 124, obtained with a model built from 36% of the Gigaword corpus. Klakow’s method is even more effective, with an optimum perplex- ity of 111, obtained with a model built from 21% of the ... language model trained on I, of a text segment s drawn from N. Let H N (s) be the per-word cross-entropy of s according to a language model trained on a ran- dom sample of N....

Ngày tải lên: 07/03/2014, 22:20

... sourcing. The number of scopal terms per sentence is 3.9, out of which 95% are NPs and the rest are scopal operators. Table (1) shows the per- centage of different types of NP in the corpus. ... similarity of two DAGs corresponding to two different scop- ings of a single sentence, we borrow the notion of transitive closure from graph theory. The transitive closure (TC) of...

Ngày tải lên: 17/03/2014, 00:20

... ps at an initial temperature of 3000 K. The system was then slowly cooled to a temperature of 0 K in 25 K steps over a period of 5 ps. At 0 K, a final stage of 150 steps of Powell minimization was ... Ramachan- dran plot of the experimental structures. The unambig- uous absence of an NOE between the H a proton of Asp4 and the H N proton of Val7 (expected always to exist in a...

Ngày tải lên: 23/03/2014, 15:20

... this particular part of the program. Secondly, the method of effecting change of word order appears to be applicable only to subsections of languages where permutation of target language ... of the space available by means of stem-ending split- ting. Apart from these faults, there were two inherent drawbacks of the above type of program. The use of separate condi...

Ngày tải lên: 30/03/2014, 17:20

... USA. Laurence R. Horn. 1989. A Natural History of Negation. University Of Chicago Press. Rodney D. Huddleston and Geoffrey K. Pullum. 2002. The Cambridge Grammar of the English Language. Cambridge University ... se- quence of words (POS tags) from the beginning of the VP until the main verb. Features (15–16) check for POS tags as the presence of certain tags usually signal that th...

Ngày tải lên: 30/03/2014, 21:20

... variety of techniques have been explored for weakly supervised training of event extrac- tion systems, primarily in the realm of pattern or rule-based approaches (e.g., (Riloff, 1996; Riloff and ... effect of the coreference prop- agation step described in Section 4.1.3 as part of training data creation. Without this step, the per- formance of the bootstrapped system yields an F s...

Ngày tải lên: 31/03/2014, 20:20

... Ionization of catechol in the presence of allopurinol and (b) blue color complex formation. 3. RESULTS AND DISCUSSION 3.1 Optimization of Experimental Conditions 3.1.1 Effect of the order of ... III C+A+F 0.750 Journal of Physical Science, Vol. 19(2), 23–30, 2008 27 3.1.2 Effect of the amount of Fe(II) and catechol In order to select the best volume of Fe...

Ngày tải lên: 07/08/2014, 14:20