people agree that learning is important

Ngày tải lên: 04/10/2012, 10:24

Ngày tải lên: 04/10/2012, 10:25

Ngày tải lên: 17/04/2013, 16:09

... police are looking for a missing boy. (Cảnh sát đang tìm kiếm đứa bé mất tích) It is believed that the boy is wearing a white pullover and blue jeans. Hay The boy is believed to be wearing ... chỉ dành để đậu xe tư nhân mà thôi. Mr Bond is much better after his illness but he’s still not supposed to do any heavy work. (his doctor has advised him not to…) Sau khi khỏi bệnh, sức khỏe ... B (Be) supposed to Đôi khi it is supposed to … = it is said to… Let’s go and see that film. It’s supposed to be very good. (=it is said to be very good) Hãy đi xem phim đó...

Ngày tải lên: 06/11/2013, 07:15

... scientists can disagree about the direction in which truth lies. Economists often disagree for the same reason. Economics is a young science, and there is still much to be learned. Economists ... that their opportunity cost of college is very high. It is not surprising that they often decide that the benefit is not worth the cost. PRINCIPLE #3: RATIONAL PEOPLE THINK AT THE MARGIN Decisions ... individual decisionmaking are that people face tradeoffs among alternative goals, that the cost of any action is measured in terms of forgone opportunities, that rational people make decisions by...

Ngày tải lên: 14/02/2014, 05:20

... sensitivity and biosynthesis in Arabidopsis. Plant Cell 16, 1912–1924. 45 Maathuis FJMM & Sanders D (1994) Mechanism of high-affinity potassium uptake in roots of Arabidopsis thaliana. Proc Natl ... not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Analysis of an Arabidopsis DExD ⁄ H box RNA helicase R ... introduced into Arabidopsis to generate pAt- HELPS::GUS transgenic plants. Histochemical GUS staining suggested that AtHELPS is mainly expressed in young seedlings and vascular tissues of leaves, such as...

Ngày tải lên: 14/02/2014, 18:20

... employees as the basis of discussion of the results. When conducting cross-sectional analysis, heteroskedasticity is often an issue to be addressed. Statistics suggested by White (1980) is used to test ... and have found fulfillment and logistics to be one of the key hurdles for e-tailers. This is a critical issue in the current study, for it is conjectured that e-tailers have not been able to ... based technologies to the same extent? The objective is to enumerate decisive criteria or significant characteristics that can be used to distinguish between the ability of players to leverage the...

Ngày tải lên: 18/02/2014, 11:20

... and His in TPP II. This region would, of course, be difficult to model, but as Arg252 is so close to H is2 64, where the structure is conserved, the model is still expected to be useful. In this ... of this finding is that the protein did not oligomerize properly, with the consequence that the subunits were prone to degradation by p roteases. With such a large deletion, it is also possible that ... the active complex is profoundly influenced by a single amino acid difference, i.e. G252R, in a region within the catalytic domain. This is the first evidence that this region is involved in the...

Ngày tải lên: 21/02/2014, 15:20

... in iron metabolism. This includes hepci- din, a 25 amino acid antimicrobial peptide that is expressed in liver cells and is now recognized as a key regulator of iron homeostasis in the body. ... hereditary haemochromatosis (HH) protein HFE (high Fe) is a type 1 transmembrane protein that plays an important role in controlling physiological iron homeostasis [1–3]. It is widely expressed throughout the ... expression highest in cells that are involved in iron metabolism [4–6]. Mutations in the HFE protein cause type 1 HH, which is an inherited disease of iron metabolism that results in iron overload in...

Ngày tải lên: 06/03/2014, 22:21

... stability of Tma-W22A is not significantly changed even when the HBD is completely removed, and therefore it is highly likely that Tma-W22A is as stable as Tma-RNase HI. Discussion Importance of ... water molecules, a two-metal ion catalysis mechanism has been proposed for RNase H [14,16,17]. According to this mechanism, one metal ion is required for sub- strate-assisted nucleophile formation and ... shown underlined. Primer 2 is designed such that the ATG codon is attached to the 5¢-terminus of the gene encoding Tma-CD. Primer 4 is designed such that the TGA codon is attached to the 3¢-terminus...

Ngày tải lên: 06/03/2014, 22:21

... than me. • My father is poor, that person's father is more famous and rich. • That other person is so much smarter than me. • That other person is so much better than me. • That other person ... engaged in comparison with others. • I have so much money, that person has so much more. • I look like this, that person is better looking than me. • I have few friends, that person is so lucky since ... beyond his real needs. His daily expenses keep rising everyday. He keeps buying things that he doesn't need. He wants to own everything and rule over this planet. This has lead to few people...

Ngày tải lên: 15/03/2014, 14:20

... hydroxide that is coordinated to the divalent metal ion, which is difficult to correlate with the pK es,1 values observed for the His92Asn and His92Ala mutants. One possibility that could resolve this ... characteristics of the His92Asn and His92Ala mutants do not support the proposal that His92 is involved in the catalytic process as either a proton donor for the leaving group or as a base that regenerates ... and ⁄ or His92. While Asn91 is a ligand to the divalent metal of the mixed-valent di-iron center, the role of His92 in the catalytic mechanism is unknown. Site-directed mutagenesis of His92 was...

Ngày tải lên: 23/03/2014, 13:20

... for this is that the trafficking in these two systems is quite different. Indeed it is now well established that the commonest of the mutations (DF508) in the CFTR protein (cystic fibrosis transmembrane conductance ... diazoxide is dis- turbed. Quantitative immunofluorescence and cell surface biotinylation supports the idea that there is little disturbance in the efficiency of trafficking. Our data show that deletions of ... indicated. Statistical analysis was carried out using one-way ANOVA with an appropriate posthoc test or Students t-test as appropriate ( ORIGIN v6.0 and PRISM v3.0). Statistical significance is as indicated...

Ngày tải lên: 31/03/2014, 08:20

... the last 26 amino acid residues of AtxA for this interaction. This is in accordance with our previous results, which suggested that specifically distributed positively charged amino acid resi- dues, ... whose identity is still unknown [18]. During purification of R25, another high-affinity binding protein for Atxs was isolated and identified as calmodulin (CaM) [19], indicating that this highly conserved, ... remained nontoxic, indicating that this region alone is not sufficient for the neurotoxic effect of Atxs. Correspondence to J. Pungerc ˇ ar, Department of Biochemistry and Molecular Biology, Jozˇ...

Ngày tải lên: 31/03/2014, 08:20

... infection and pathogenesis is not well understood. MHV strain 3, which causes fulminant hepatitis, was shown to induce the synthesis of PGE 2 in macrophages [25]. However, the exogenous administration of ... Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, ... statistical analysis a one-way ANOVA with the Tukey- Kramer test was performed using GraphPad Prism version 3.00 for Windows (GraphPad Software). In all tests, P < 0.05 was considered statistically...

Ngày tải lên: 18/06/2014, 18:20

Ngày tải lên: 20/06/2014, 01:20

Ngày tải lên: 22/06/2014, 21:20

Ngày tải lên: 27/06/2014, 23:20

Ngày tải lên: 28/06/2014, 12:20

Ngày tải lên: 28/06/2014, 18:20