نتایج جستجو برای: hm po4 xn
تعداد نتایج: 13715 فیلتر نتایج به سال:
Let a,b∈R , with a≠b . The harmonic, logarithmic, and arithmetic means of a b are respectively defined by H(a,b)=21a+1b=2aba+b,L(a,b)=b−a ln b− ln a A(a,b)=a+b2 .Theorem. For 0<a<b,2a+b< ...
A sequence (xn)n=1? on the torus T exhibits Poissonian pair correlation if for all s>0,limN???1N#{1?m?n?N:|xm?xn|?sN}=2s. It is known that this condition implies equidistribution of (xn). We generalize result to four-fold differences: s>0 we havelimN???1N2#{1?m,n,k,l?N{m,n}?{k,l}:|xm+xn?xk?xl|?sN2}=2s then equidistributed. This notion generalizes higher orders, and any k show a exhibiting 2k-fo...
We investigate the Ramsey theory of continuous graph-structures on complete, separable metric spaces and apply the results to the problem of covering a plane by functions. Let the homogeneity number hm(c) of a pair-coloring c : [X]2 → 2 be the number of c-homogeneous subsets of X needed to cover X. We isolate two continuous pair-colorings on the Cantor space 2ω , cmin and cmax, which satisfy hm...
Let S be a Borel subset of Polish space and F the set bounded functions f:S→R. an(·)=P(Xn+1∈·∣X1,…,Xn) n-th predictive distribution corresponding to sequence (Xn) S-valued random variables. If is conditionally identically distributed, there probability measure μ on such that ∫fdan⟶a.s.∫fdμ for all f∈F. Define Dn(f)=dn∫fdan−∫fdμ f∈F, where dn>0 constant. In this note, it shown that, under som...
BACKGROUND Juvenile Fibromyalgia (JFM) is characterized by chronic widespread musculoskeletal pain and approximately 40% of children and adolescents with JFM also suffer from benign joint hypermobility (HM). It is not currently known if the presence of HM affects the pain experience of adolescents with JFM. The objective of this study was to examine whether there were any differences in self-re...
Adsorption and desorption of phosphorus (P) and nitrogen (N) by stalk residues may influence the concentrations of P and N in runoff. A laboratory study was conducted to measure the effects of P and N constituents in solution on adsorption and desorption of P and N by corn, soybean, and wheat stalk residues. Experimental variables included type of stalk material (corn, soybean, and wheat), inor...
Open-framework zinc phosphates with one-dimensional ladder structures are shown to transform, under simple reaction conditions, to twoand three-dimensional structures. Thus, the one-dimensional ladder, [C6N4H22]0.5[Zn(HPO4)2], I, on heating with piperazine in aqueous solution gives a layer phosphate, [C4N2H12][Zn2(PO4)2], III, and the three-dimensional phosphates [C2N2H10]0.5[Zn(PO4)], IV, [C6N...
Microalgae play an important role in arsenic (As) biogeochemical cycles as they are capable of accumulating and metabolizing this metalloid efficiently. This study aimed to investigate the toxicity, accumulation and transformation of arsenate (As(v)) in Dunaliella salina, an exceptionally halotolerant microalga, under various phosphate (PO4(3-)) regimes. The results of the 72-h toxicity test sh...
Fibroblast growth factor (FGF) signaling regulates mammalian development and metabolism, and its dysregulation is implicated in many inherited and acquired diseases, including cancer. Heparan sulfate glycosaminoglycans (HSGAGs) are essential for FGF signaling as they promote FGF.FGF receptor (FGFR) binding and dimerization. Using novel organic synthesis protocols to prepare homogeneously sulfat...
There are many biological contexts in which DNA damage generates "dirty" breaks with 3'-PO4 (or cyclic-PO4) and 5'-OH ends that cannot be sealed by DNA ligases. Here we show that the Escherichia coli RNA ligase RtcB can splice these dirty DNA ends via a unique chemical mechanism. RtcB transfers GMP from a covalent RtcB-GMP intermediate to a DNA 3'-PO4 to form a "capped" 3' end structure, DNA3'p...
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