the main function of transport layer is

... them, instead of learning how to do it themselves. The third cause is lack of access to computer. The fourth cause is dissatisfactory school base. The fifth cause is insufficient allocation of ... we depend on other people. Causes The first cause of the problem of computer illiteracy is the lack of useful information in the course of information science. The second cause is unwillingness ... we will move to the next alternatev. And this is the increasing of motivation for attending these courses. The first measure to solve the problem (and it is the most effective) is to introduce...

Ngày tải lên: 26/10/2013, 17:15

... glial scar formation. It is important to note that the synthesis of MT1 and MT2 in the injured or diseased brain is quite different from the synthesis of GIF. While GIF synthesis is gen- erally considered ... this MT isoform has different and distinct functions within the brain. Furthermore, the discovery and continued investigation of this brain-spe- cific MT isoform has led to intense interest in the ... fine processes of these cells. Astrocytic synthesis of GIF is mainly found in the cortex, brainstem and spinal cord [6]. Additionally however, there are also consistent reports of neuronal synthesis of GIF,...

Ngày tải lên: 16/02/2014, 15:20

... possesses the same characteristics of the interior of the protein matrix. The script a is the peak–peak distance between the maximum at %287 nm and the minimum at %283 nm, and the script b is the peak–peak ... two in the Nt-domain are probably solvent exposed in the flexible structure of the domain. It is proposed that at least one is buried in the core of the protein (Y134) while the others seem to be ... are the fluorescence intensities in the presence and absence of the quencher Q, K sv is the collisional quenching constant, and V is the static constant, which is related to the probability of...

Ngày tải lên: 21/02/2014, 00:20

... changes in the distribution function of η. In the paper, we investigate the distribution function of η when we have the small changes of the distribution of ν. 1. Introduction Let us consider the random ... a(z) is the generating function of ν and ϕ(t) is the characteristic function of ξ k . In [1] and [2], we gave some the stabilities of Ψ(x) in the following sence: the small changes in the distribution ... random, independent of all ξ k . In [1] and [2], we gave some the stabilities of the distribution function of η in the following sense: the small changes in the distribution function of ξ k only lead to the...

Ngày tải lên: 14/03/2014, 13:20

... tubulin, the tyrosination/detyrosin- ation at the C-terminus of a-tubulin is the main operating mechanism. Furthermore, when cells maximally nitrotyro- sinated were cultured in the presence of taxol ... at the same site. Another biochemical characteristic of tubulin is its ability to act as substrate of the detyrosinating enzyme, tubulin carboxypeptidase. Eiserich et al. reported [11] that the ... nitro- tyrosine and cell injury. One of the most studied post-translational modifications of tubulin is the addition or removal of a tyrosine residue at the C-terminus of the a-subunit [1–3]. Two enzymes, tubulin...

Ngày tải lên: 17/03/2014, 10:20

... through these FLAG- tagged proteins. Neither the N-terminus nor the C-terminus of Glut1 is needed for the DRM distribution To determine the functional domains responsible for the DRM distribution of ... as this domain was included in the most effective chimeric construct A (Fig. 5), and is one of the major characteristics of these isoforms [25]. However, chimeric construct D, in which this intracellular ... Further shorten- ing of these regions altered the critical distribution, suggesting that a large proportion or several parts of the intrinsic structure, including the N-termi- nus of each isoform,...

Ngày tải lên: 23/03/2014, 09:20

... a reason for the different migration behaviour. Molecular cloning of the new hyaluronidase isoform, Ves v 2b Aiming at the molecular cloning of the cDNA of the newly discovered hyaluronidase isoform ... report on the identification of the major polypeptide in the 43 kDa band of V. vulgaris as a new isoform of hyaluronidase. Furthermore, we ana- lyzed the hyaluronidase band in five other common yellow ... vulgaris does not stand high on the list of organisms whose genomes will be fully sequenced in the near future, the composition of the 43 kDa band would not have been revealed otherwise. Cloning of...

Ngày tải lên: 23/03/2014, 15:20

... deletion of OXA1 decreased the rate of formation of all aminoglycerophospholipids. The rate of PtdSer synthesis decreased to 80%, the rate of PtdEtn formation to 70% and that of PtdCho synthesis to ... regulatory mechanism. It should be noted that the steady-state lev- els of individual phospholipids do not necessarily reflect the rates of synthesis of the components. Table 1. Phospholipid composition of ... affected synthesis of PtdEtn by Psd1p, but did not completely abolish the activity of this enzyme. Activity of Psd1p in vitro is impaired in oxa1D PtdEtn depletion in mitochondria and the decreased rate...

Ngày tải lên: 30/03/2014, 04:20

... from the top of the native gel to the position of the monomeric form of the enzyme. From these data, it was concluded that the mutation e19A altered the relationship between subunit e and the other ... sought whether the mutations in the dimerization motif of subunit e affected the dimerization/oligomerization of the ATP synthases. Therefore, the presence of Table 1. Phenotypic analysis of yeast ... cerevisiae (P81449, Swiss-Prot) are in bold. The numbering of the yeast sub- unit e begins at the initiating methionine. The star indicates the position of the unique cys- teine residue of the...

Ngày tải lên: 31/03/2014, 01:20

... app., transport, link layers ❒ top-10 list of important networking topics! ❒ characteristics of unreliable channel will determine complexity of reliable data transfer protocol (rdt) Transport Layer ... #’s ❍ again limits seq #s of sent, unACKed pkts Transport Layer 3-5 Transport vs. network layer ❒ network layer: logical communication between hosts ❒ transport layer: logical communication ... receiver ❒ Two generic forms of pipelined protocols: go-Back-N, selective repeat Transport Layer 3-1 Chapter 3 Transport Layer Computer Networking: A Top Down Approach Featuring the Internet , 3 rd ...

Ngày tải lên: 27/06/2014, 16:20

... 2000. The graph indicates the growing use of cars for commuting to work between 1960 - 2000, and the corresponding decline in the popularity of buses from being the most popular mode of transport ... minutes on this task. model answer: The graph shows the changing patterns in commuting by train, car, tube or bus for commuters in London in the years 1960, 1980 and 2000. The number of people ... but then fell back to about 23% in 2000. Use of the tube has been relatively stable, falling from around 27% of commuters in 1960 to 22% in 1980, but climbing back to reach 25% by 2000. On the...

Ngày tải lên: 07/07/2014, 12:20

Ngày tải lên: 06/08/2014, 18:20

... by the isomorphism classes of its vertex-deleted subgraphs is the most general case of problems of this type. There are counter-examples to the question of whether a graph invariant I(G) is reconstructible from ... H 12  and  G 12 , H 11  differ only in their respective coefficients of x. The list of the characteristic polynomials of the vertex deleted subgraphs of the two graphs is shown in Table 1. This is hardly an indication ... 2000. Abstract The question of whether the characteristic polynomial of a simple graph is uniquely determined by the characteristic polynomials of its vertex-deleted sub- graphs is one of the many...

Ngày tải lên: 07/08/2014, 06:20

... pp. the electronic journal of combinatorics 13 (2006), #R53 48 3. The part of P in the fourth quadrant is a T-path. 4. The part of P that is above the line y = 0is an H 2 path. Theorem 7.6. The ... =1 0, otherwise where we interpret the binomial coefficient  a b  as 0 if either a or b is negative, and the verification of the recurrence is straightforward. (We will give another proof of (48) ... conditions. 1. The path P never goes above the diagonal. 2. The part of P that is below the line y = −2x is a V 2 path. 3. The part of P between the two lines y = −2x and x = −2y is a normal path. 4. The...

Ngày tải lên: 07/08/2014, 13:21

... product over the vertices of G of the weights of the spins times the product over the edges of G of the weights of the spin-pairs. In this language Z W (G) is the partition function of the the electronic ... for the set of all list homomorphism from G to H with list set L(G, H). The notion of a list homomorphism is a generalization of that of a homomorphism. Indeed, if L(v)=V (H) for all v ∈ V (G) then ... (independent of G and N), and asymptotically tight in the case of a family of graphs satisfying βd = ω(1). We give the proof ofTheorem 1.3in Section 3. An important tool in theproof is an extension of Theorem...

Ngày tải lên: 07/08/2014, 13:21

Ngày tải lên: 07/08/2014, 13:21

Ngày tải lên: 09/08/2014, 03:21

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Ngày tải lên: 10/08/2014, 09:21

Ngày tải lên: 11/08/2014, 11:21