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pi-pi Interactions play an important role in the stability of protein structures. In the present study, we have analyzed the influence of n-n interactions in eNOS and nNOS proteins. The contribution of these pi-pi interacting resi...
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pi-pi Interactions play an important role in the stability of protein structures. In the present study, we have analyzed the influence of n-n interactions in eNOS and nNOS proteins. The contribution of these pi-pi interacting residues in sequential separation, secondary structure involvement, solvent accessibility and stabilization centers has been evaluated, pi-pi interactions stabilize the core regions within eNOS and nNOS proteins, pi-pi interacting residues are evolutionary conserved. There is a significant number of tc-tc interactions in spite of the lesser natural occurrences of pi-residues in eNOS and nNOS proteins. In addition to n-n interactions, n residues also formpi-pi networks in both eNOS and nNOS proteins which might play an important role in the structural stability of these protein structures.
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In this paper, real frequency design equations of narrowband impedance matching network with complex terminations are derived; which are used to design L, Pi and T type of networks. In the approach, there is no need to have termin...
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In this paper, real frequency design equations of narrowband impedance matching network with complex terminations are derived; which are used to design L, Pi and T type of networks. In the approach, there is no need to have termination models with component values, it is enough to have measurement values of termination impedances. A few examples are solved to exhibit the have measurement values of termination impedances. A few examples are solved to exhibit the merits and application of the derived equations.
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This article uses a hierarchical, multilayered neural network to provide parameters for a nonlinear PI controller in response to local operating conditions. The Generalized Delta Rule is adopted for use in training the connective ...
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This article uses a hierarchical, multilayered neural network to provide parameters for a nonlinear PI controller in response to local operating conditions. The Generalized Delta Rule is adopted for use in training the connective weights of the network for subsequent on-line variation of the network-based PI controller parameters during control. Several numerical examples and one example of a highly nonlinear neutralization process are supplied to demonstrate the superior servo as well as regulatory control performance of the proposed neural net-based nonlinear PI control system. [References: 17]
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Two isomorphous one-dimensional chain complexes Co(NCS)_2(Him)_2 (1) and Mn(NCS)_2(Him)_2 (2) (Him = imidazole) have been prepared and characterized structurally. Both 1 and 2 crystallize in the monoclinic system, space group P2_1...
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Two isomorphous one-dimensional chain complexes Co(NCS)_2(Him)_2 (1) and Mn(NCS)_2(Him)_2 (2) (Him = imidazole) have been prepared and characterized structurally. Both 1 and 2 crystallize in the monoclinic system, space group P2_1/n, and the structures consist of one-dimensional polymeric chains in which metal ions are bridged by two thiocyanate groups bonding in end-to-end fashion. Both 1 and 2 exhibit two-dimensional sheet structures with N-H … S hydrogen bonds and three-dimensional supramolecular network structure with pi ... pi stacking interactions. IR spectra indicate the presence of bridging thiocyanate groups in both 1 and 2, confirmed by their structures. The variable temperature magnetic susceptibility, measured in the 2-300 K range, indicates weak antiferromagnetic exchange interactions in complex 2.
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1-Alkyl-2-(arylazo) imidazoles are pi-acidic, bidentate chelating molecules. In acid medium imidazole-N centers are protonated and can extract heavy anions. One such example is the binding with ReO_4~- in acidic medium. 1-Alkyl-2-...
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1-Alkyl-2-(arylazo) imidazoles are pi-acidic, bidentate chelating molecules. In acid medium imidazole-N centers are protonated and can extract heavy anions. One such example is the binding with ReO_4~- in acidic medium. 1-Alkyl-2-(arylazo) imidazolium-perrehenate shows hydrogen obnded 1D network. Inclusion of H_2O into the molecular frame of 1D increases the dimensionality to 2D network.
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Initially identified as a key phosphoinositide that controls membrane trafficking at the Golgi complex, phosphatidyl-inositol-4-phosphate (PI4P) has emerged as a key molecule in the regulation of a diverse array of cellular functi...
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Initially identified as a key phosphoinositide that controls membrane trafficking at the Golgi complex, phosphatidyl-inositol-4-phosphate (PI4P) has emerged as a key molecule in the regulation of a diverse array of cellular functions. In this review we will discuss selected examples of the findings that in the last few years have significantly increased our awareness of the regulation and roles of PI4P in the Golgi complex and beyond. We will also highlight the role of PI4P in infection and cancer. We believe that, with the increasing number of regulators and effectors of PI4P identified, the time is ripe for a more integrated approach of study. A first step in this direction is the delineation of PI4P-centered molecular networks that we provide using data from low and high throughput studies in yeast and mammals.
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A new three-dimensional polymeric supramolecular Pb-II complex, {[Pb-3(bpy)(3)(ip)(3)](H2O)}(n), (bpy = 2,2'-bipyridine and ip = isophthalate), has been synthesised and characterised. Single-crystal analysis shows that {[Pb-3(bpy)...
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A new three-dimensional polymeric supramolecular Pb-II complex, {[Pb-3(bpy)(3)(ip)(3)](H2O)}(n), (bpy = 2,2'-bipyridine and ip = isophthalate), has been synthesised and characterised. Single-crystal analysis shows that {[Pb-3(bpy)(3)(ip)(3)](H2O)}(n) contains a one-dimensional chain polymeric framework and all the Pb centres with a coordination number of six possess an electron lone pair. The coordination sphere is hemidirected which gives a highly distorted geometry. The arrangement of O- and N- atoms towards Pb atoms suggests a gap or hole in the coordination geometry around these atoms. Moreover, there are three types of pi-pi interactions between aromatic rings and the one-dimensional chains, which are connected by these interactions to form a three dimensional supramolecular network with the channels occupied by water molecules.
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Proportional integral plus feedforward (PI+FF) control was proposed for identifying the pipe temperature in hot water heating greenhouse. To get satisfying control result, ten coefficients must be adjusted properly. The data for t...
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Proportional integral plus feedforward (PI+FF) control was proposed for identifying the pipe temperature in hot water heating greenhouse. To get satisfying control result, ten coefficients must be adjusted properly. The data for training and testing the radial basic function (RBF) neural-networks model of greenhouse were collected in a 1028 m2 multi-span glasshouse. Based on this model, a method of coefficients adjustment is described in this article.
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A novel coordination polymer [Cd(bpy)(tp)(H_2O)]_n (10 has been prepared through hydrothermal reaction and structurally characterized,and the compound gives strong fluorescent emission.The structure of the compound consists of CdN...
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A novel coordination polymer [Cd(bpy)(tp)(H_2O)]_n (10 has been prepared through hydrothermal reaction and structurally characterized,and the compound gives strong fluorescent emission.The structure of the compound consists of CdN_2O_4 octahedron linked through bridging terephthalate (tp) into 1D structure,and then a 3D supramolecular structure is formed adopting herringbone packing in the solid state through pi-pi stacking and hydrogen bonding interactions.
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The cyclic silver (I) dimer [Ag(m-bitmb)]_2 (PF_6)_2 centre dot 2MeCN of 1,3-bis(imidazolylmethyl)-2,4,6-trimethylbenzene (m-bitmb) was prepared and its structure characterized by X-ray crystallography. An PF_6~- anion is encapsul...
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The cyclic silver (I) dimer [Ag(m-bitmb)]_2 (PF_6)_2 centre dot 2MeCN of 1,3-bis(imidazolylmethyl)-2,4,6-trimethylbenzene (m-bitmb) was prepared and its structure characterized by X-ray crystallography. An PF_6~- anion is encapsulated within the macrocyclic cation [Ag(m-bitmb)]_2~(2+) with weak Ag… F and CH…F interactions. Two types of intermolecular #pi#-#pi# interactions lead to a brick wall network.
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