Báo cáo " Sol-gel synthesis and particle size characterization of CdSe Quantum dots " ppt

... VNU Journal of Science, Mathematics - Physics 25 (2009) 207-211 207 Sol-gel synthesis and particle size characterization of CdSe Quantum dots Khong Cat Cuong 1 , Trinh ... long time reaction and its distribution in particle size is in the broadening range. In this article, we report on the preparation of CdSe quantum dots (QDs) by sol-gel method and...

Ngày tải lên: 14/03/2014, 13:20

... oligomers: spectroscopic characterization of amyloidogenic protein states Mikael Lindgren 1 and Per Hammarstro ¨ m 2 1 Department of Physics, Norwegian University of Science and Technology, Trondheim, ... thio- flavin T (ThT) [4] and Congo red [5], with concomitant alterations of their optical properties in terms of, for example, fluorescence quantum efficiency and their infl...

Ngày tải lên: 06/03/2014, 09:22

... class. The first type of lexicon is an IH lexicon com- prised of a list of attribute names for the intent class, e.g., “box of ce” and “review” for the intent class Movie. One easy way of composing such ... primary focus of previous works, but also understanding their semantic structure. In this work, we formally define the semantic structure of noun phrase queries as comprised...

Ngày tải lên: 20/02/2014, 04:20

... the same span and the same category are considered equivalent if they delay the evalua- tion of the probabilities of the same words and if they have the same number of lexical heads, and if the ... not distinguish between the dependency relations of Hij and geeft in the first sentence, bloem and geeft in the second sen- tence and politieman and geeft in the third sentence...

Ngày tải lên: 20/02/2014, 16:20

... al., 2007) and applications such as Information Retrieval and Question Answering (Shah and Croft, 2004; Pasca and Harabagiu, 2001). Beyond WordNet (Fell- baum, 1998), a wide range of resources ... distributional methods (Lin-dep and Lin-prox) and combinations of pattern-based and distributional methods (CBC and Snow 30k ). 5 Results and Analysis The results and analysi...

Ngày tải lên: 22/02/2014, 02:20

... result of their combination (Manning and Schütze, 1999). We think of a corpus as a ran- domly generated sequence of words that is viewed as a sequence of word pairs. Occurrence frequencies of these ... lemmas and part -of- speech of the compo- nents, and type of dependence between the compo- nents. For each bigram type we counted frequencies in its contingency table, extra...

Ngày tải lên: 08/03/2014, 04:22

... CHARACTER OF NON-STANDARD INPUT Anthony S. Kroch and Donald Hindle Department of Linguistics University of Pennsylvania Philadelphia, PA 19104 USA ABSTRACT If natural language understanding ... discuss each of the above cases with examples, drawing on work we have done describing the differences between the syntax of vernacular speech and of standard writing (Kroch a...

Ngày tải lên: 24/03/2014, 01:21

... concentration of the exudate was also determined. Each point represents the mean ± standard errors of 4–6 rats. Fig. 5. Formation of granulation tissue and retention of exudate. Granulation tissue and ... amounts of recombinant Fig. 3. Comparison of the amino acid sequence of rat S100A9 and peptides isolated from FGSF. The identified amino acid residues of a cyanogen brom...

Ngày tải lên: 30/03/2014, 13:20

... comparison of band absorbance. Absence of a sharp and convoluted spectral band around 3600–3000 cm )1 in the spectra of both chitosan and LMWC indicated the absence of free -OH groups and the involvement ... rate of 1.0 mLÆmin )1 and detected using an RI detector. Chito-oligomers and GlcNAc were used as standards. Further characterization of chitosan and the depolyme...

Ngày tải lên: 19/02/2014, 12:20

... relative potencies of GS and its ring -size analogs in perturbing the organization and increasing the permeability of phospholipid bilayer model membranes, and of inhibiting the growth of A. laidlawii ... excitation and emission of 3 nm and quartz cells of 1-cm path length; the excitation and emission were recorded at wavelengths of 496 and 516 nm, respectively. T...

Ngày tải lên: 21/02/2014, 01:21