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Organic chemitry t8 nucleophilic substitution on the carbonyl group
Ngày tải lên :
05/03/2014, 22:28
... by the reaction To this, they change the reaction conditions by using one of the following two approaches They remove one, or both, of the products as they form, particularly the water, or they ... protonated aldehydes and ketones The first two resonance contributors are equal in energy, but the third is only a minor contributor to the resonance The protonated carboxylic acid then adds the ... case, is the carbonyl carbon In the carboxylic acid family, the leaving group (the electronegative group bonded to the carbonyl carbon) is a base, but is generally a weaker base than the nucleophile...
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Báo cáo toán học: "An addition theorem on the cyclic group Zpαqβ" pptx
Ngày tải lên :
07/08/2014, 13:21
... − and p is the smallest prime divisor of n Then p S H=∅ n for any nontrivial subgroup H of G Proof For any nontrivial subgroup H of G, let ϕ : G → G/H be the natural homomorphism Then ϕ(S) is ... Ginzburg and A Ziv, Theorem in the additive number theory, Bull Res o Council Israel, 10 F(1961), 41-43 [2] W D Gao, R Thangadurai and J Zhuang, Addition theorems on the cyclic group Zpn , preprint ... prove the Conjecture for n which has only two distinct prime divisors Theorem The above Conjecture is true for n = pα q β where p, q are distinct primes and α, β are positive integers Proof of Theorem...
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Báo cáo toán học: "Cayley graphs on the symmetric group generated by initial reversals have unit spectral gap" potx
Ngày tải lên :
07/08/2014, 21:21
... which G is the permutation group Sn There is a one-to-one correspondence between Irr(Sn ) and the set of all partitions of n A partition of n is if one is interested in multiplicities of the eigenvalues, ... (n) is the one–dimensional identity representation which yields one eigenvalue equal to |w| in R(w) We conclude this section with a remark concerning a connection between results like Theorem ... branching rule [11, Section 2.8] for the decomposition the electronic journal of combinatorics 16 (2009), #N29 of the restriction of an irreducible representation [α] of Sn to the subgroup Sn−1 This...
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Báo cáo toán học: "Some design theoretic results on the Conway group ·0" pps
Ngày tải lên :
08/08/2014, 11:20
... analogous conditions for other elements of the group and to certain subgroups In Section we recall some notation along with the basic construction of the Leech lattice and the group ·0 In Section we ... in the λ position in the ith column and zeros in the other three positions, or we may complement this and place in the λth position and 1s in the other three positions We this for each of the ... have described the Curtis form of the MOG To obtain the Conway form of the MOG, also commonly found in the literature, one need only swap over the rightmost two columns the electronic journal of...
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Báo cáo toán học: "On the automorphism group of integral circulant graphs" docx
Ngày tải lên :
08/08/2014, 14:22
... question from [23] about the ratio of the size of the automorphism group of Xn and the size of the group of affine automorphisms of Xn In addition, we determine the size of the automorphism group ... class Ci is mapped to the class Cj Since the vertices from the class Ci form an independent set and the restriction of the automorphism f on the vertices of Ci is a bijection from Ci to Cj , we ... , k Constants cpi are the solutions of the following system of k congruence equations cp i ≡ cp i ≡ (mod pi ) (mod pj ), ≤ j ≤ k, j = i The form of the solution (1) follows directly from the Chinese...
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Báo cáo toán học: "A Note on the Critical Group of a Line Graph" doc
Ngày tải lên :
08/08/2014, 14:23
... is the k-torsion subgroup of K(LG, e∗ ) These results appear as Theorem and may be seen as analogous to Theorem 1.2 of [3] In [3], partially for convenience, some assumptions are made about the ... question affirmatively by demonstrating a surjection K(LG, e∗ ) → K(G, w∗ ) Further, in the case in which the out-degree of each vertex of G is a fixed integer k, we show the kernel of this surjection ... that if e∗ = (w∗ , v∗ ), then κ(G, w∗ ) divides κ(LG, e∗ ) under the hypotheses of our Theorem This leads him to ask the natural question as to whether K(G, w∗ ) is a subgroup or quotient of K(LG,...
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on the fundamental group of noncompact manifolds with nonnegative ricci curvature
Ngày tải lên :
13/11/2014, 09:08
... see the first object which is then removed from your view and then you are shown the second object You are then asked whether the two objects look alike To answer the question you compare the ... Section 3.1 In the third part we give bounds on the number of generators of the fundamental group under some natural geometric conditions In fact, we show that the fundamental group of these ... then M is compact and has finite fundamental group If we weaken the hypothesis of the Bonnet-Myers Theorem the conclusions no longer hold For example, the paraboloid {(x, y, z) ∈ R3 : z = x2 + y...
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on the galois groups of the 2-class field towers of some imaginary quadratic fields
Ngày tải lên :
13/11/2014, 09:08
... field These patterns give rise to a class of group extensions that includes each of the groups We conjecture subgroup and quotient group properties of these extensions ON THE GALOIS GROUPS OF THE ... show that the groups in L5 are terminal Among the collection of groups on L1 , , L5 , there are 12 candidates, each having exponent-2 class Therefore, G must be one of these 12 groups In particular, ... method then uses the p -group generation algorithm (to be discussed in detail in Section 2.1), which computes presentations for finite p-groups The group Gal(kS /k) is searched for among the groups...
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ON THE AUTOMORPHISM GROUP OF A CERTAIN INFINITE TYPE DOMAIN IN C 2
Ngày tải lên :
12/10/2015, 16:26
... compact set nonempty interior, and choose L > Then there exists C = C(K, L) > such that for any negative plurisubharmonic function u in Ω satisfying the condition u(z) < −L on K, the following ... the Schwarz reflection principle to show that the holomorphic functions h1 , h2 must vanish to finite order at the origin Then the equation (1) implies that h1 ≡ Therefore, from Chirka’s curvilinear ... type model This section is devoted to the proof of Theorem Assume that P : C → R is a C ∞ -smooth function satisfying (i) and (ii) as in Introduction Then we consider a nontrivial holomorphic...
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RESEARCH ON THE CHANGE OF 2-AP AND OTHER VOLATILE COMPOUNDS IN PROCESSING BUN FROM RICE
Ngày tải lên :
28/08/2013, 16:28
... Hien, Truong Thi Bich Lieu (2011) Research on the extraction and utilization of 2-AP from Pandanus’leaf as the standard for identification and quantification of 2-AP in aromatic rice, Conference ... hours; non-soaked rice served as control 2.2 Extraction methods a Simultaneous Distillation-Extraction (SDE) The steam distillation-solvent extraction was used as a reference for 2AP and other volatile ... Research on the Change of 2-AP and Other Volatile Compounds in Processing Bun from Rice coupling with GC and GCMS SPME/GC enables for estimation of 2-AP low concentration like aromatic rice The SDE...
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A STUDY ON THE TRANSLATION OF ACCOUNTING TERMS FROM ENGLISH INTO VIETNAMESE
Ngày tải lên :
11/12/2013, 23:53
... to the intentions and the textrealization of the SL writer Semantic Translation: It differs from faithful translation only in as far as it must take more account of the aesthetic value of the ... upon the ST audience They argue that 'Frequently, the form of the original text is changed; but as long as the change follows the rules of back transformation in the source language, of contextual ... reproduces the matter without the manner, or the content without the form of the original Usually it is a paraphrase much longer than the original Therefore, the advantage is that the text in TL...
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A STUDY ON THE TRANSLATION OF WEATHER TERMS FROM ENGLISH INTO VIETNAMESE
Ngày tải lên :
11/12/2013, 23:55
... Translation is the interpretation of the meaning of a text in one language (the source text) and the production in another language of equivalent text (the target text) that communicates the same ... grammatical construction is converted to the nearest TL equivalent but the lexical words are again translated singly, out of context 2.3 Faithfull translation The translation reproduces the exact contextual ... Translation is the comprehension of the meaning of a text and the subsequent production of an equivalent text, likewise called a "translation," that communicates the same message in another language The...
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Tài liệu University Oars Being a Critical Enquiry Into the After Health of the Men Who Rowed in the Oxford and Cambridge Boat-Race, from the Year 1829 to 1869, Based on the Personal Experience of the Rowers Themselves pdf
Ngày tải lên :
14/02/2014, 21:20
... shall next consider the cases of six old Oars who have died since their rowing days—five of them from consumption, and one from heart disease How far they suffered from their labours on the river ... only 13 more than they have actually enjoyed Hence, if each one of the survivors lived only thirteen months longer and then died, the crew might be looked upon in the mass as having reached the ... crew in the table is the first 1849 Cambridge crew Four of the men of which it consisted died young; (two of them from accidental causes, one only three years after the race, and the other only...
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Tài liệu A REVIEW OF INDOOR AIR POLLUTION AND HEALTH PROBLEMS FROM THE VIEWPOINT OF ENVIRONMENTAL HYGIENE: FOCUSING ON THE STUDIES OF INDOOR AIR ENVIRONMENT IN JAPAN COMPARED TO THOSE OF FOREIGN COUNTRIES pptx
Ngày tải lên :
17/02/2014, 22:20
... humidity on the indoor environment was studied to identify the influence on the psycho-physiologic condition of the occupants.40) Temperature The relationship between buildings-related symptoms and thermal ... from old furniture might affect the health of residents The regulation of chemical emission from furniture and the education of residents are required COMMUNICATION BETWEEN MEDICAL INSTITUTIONS ... that SHS and MCS as the same, because they have been confused by the media.29) A systemic literature review was conducted to confirm and extend the U.S.A case definition of MCS The results showed...
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Tài liệu MEASUREMENTS OF OUTDOOR AIR POLLUTION FROM SECONDHAND SMOKE ON THE UMBC CAMPUS pdf
Ngày tải lên :
17/02/2014, 22:20
... in the longitudinal direction by the wind, and in the transverse directions by diffusion A highly simplified expression which illustrates the physics for the downwind concentration C on the plume ... source The more turbulent the atmosphere, the more rapid the spread of the plume in the direction transverse to the direction of propagation of the plume The maximum concentration at ground level is ... describe the dispersal of emissions from a point source at ground level: The downwind concentration at any location is directly proportional to the mass emission rate of the source The more turbulent...
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Tài liệu Báo cáo khóa học: A multi-protein complex containing cold shock domain (Y-box) and polypyrimidine tract binding proteins forms on the vascular endothelial growth factor mRNA Potential role in mRNA stabilization pptx
Ngày tải lên :
19/02/2014, 12:20
... mutation of either the consensus CSD site or the downstream PTB sequence CSD proteins therefore recognize not only the expected consensus RNA sequence but also the VEGF PTB binding sequences The ... expression at the transcriptional level in the nucleus [51] We show here that CSD proteins may also play a role in post-transcriptional regulation of VEGF expression in the cytoplasm, in conjunction ... complexes on the VEGF mRNA (Eur J Biochem 271) 649 actions on the VEGF 3¢-UTR [17,18] but factors involved in stability or translational regulation have not been identified on the 5¢-UTR The single-strand...
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Tài liệu Báo cáo khoa học: "From HOPE en I''''ESPERANCE On the Role of Computational Neurolinguistics in Cross-Language Studies " pptx
Ngày tải lên :
21/02/2014, 20:20
... though there is another a r t i c l e as above The question becomes should the phonetic representation be defined as "l'eau" or as the content word in isolation, "eau?" The decision affects the ... Comprehension of French For spoken English, word boundaries tend to be marked by intonation or pauses However, for French this is not the case Depending on the context, the ending of one word may be phonet ... phonetic representation of words, along with the implications of the determined representation for our processing approach to comprehension of French, w i l l form the basis of the discussion...
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Light from Ancient Campfires - Archaeological Evidence for Native Lifeways on the Alberta Plains pptx
Ngày tải lên :
06/03/2014, 01:22
... ask an 'open' question The first argument is the question, the second one is the text that the user starts with A line of text can be typed into the window, and the function will return this ... location in memory location Subtract the number 11 from the value in memory location If the value in memory location is the number 0, continue with instruction Add the value of memory location to ... semicolons The part before the first semicolon initialises the loop, usually by defining a variable The second part is the expression that checks whether the loop must still continue The final...
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