Molecular docking and spectroscopic methods to probe the interaction of acetylgliotoxin and HSA

The interaction between acetylgliotoxin and human serum albumin (HSA) has been studied by spectroscopic method. Acetylgliotoxin quenches the intrinsic fluorescence of HSA in a static quenching procedure. The binding of acetylgliotoxin to HSA causes a slight conformational change of HSA. The binding constants at different temperatures as well as enthalpy change and entropy change, are calculated according to relevant fluorescent data and Van’t Hoff equation. The hydrogen bond is a predominant intermolecular force for stabilizing the complex, which is in conformity with the results of molecular modeling study.     

Characterizations of <Emphasis Type="Italic">L</Emphasis><Subscript><Emphasis Type="Italic">p</Emphasis></Subscript>(<Emphasis Type="Italic">R</Emphasis>) using tight wavelet frames

In this paper,a Littlewood-Paley function characterization of the spaces L p(R),1相似文献   

Multi-target track-correlation algorithm of the graph-matching-based sensor network

For the problem of track correlation failure under the influence of sensor system deviation in wireless sensor networks, a new track correlation method which is based on relative positional relation chart matching is proposed. This method approximately simulates the track correlation determination process using artificial data, and integrally matches the relative position relation between multiple targets in the common measuring space of various sensors in order to fulfill the purpose of multi-target track correlation. The simulation results show that this method has high correlation accuracy and robustness.     

Influence of urbanization on the surface water quality in Guangzhou,China

The urbanization process is a trend occurring inevitably in the historical development. This paper reviews the progress of the urbanization in Guangzhou and focuses on the change of water quality in the Guangzhou reach of the Pearl River. 8 kinds of main pollutant parameters were collected from 9 important sections in the Guangzhou reach of the Pearl River from 1986 to 2000 and the water quality change was analyzed per time and space. The study concludes that the surface water quality of Guangzhou reflects ...     

Screening and denitrification characteristics of a slight halophilic heterotrophic nitrobacteria

A slight halophilic heterotrophic nitrobacteria named gs1 was separated from the matured activated sludge. According to the morphological observation,physiological biochemical tests and sequence analysis of the 16S rDNA,strain gs1 was identified to be as Pseudomonas sp. Sodium acetate and ammonium chloride were used as carbon and nitrogen sources,respectively,to investi-gate the characteristics of the bacterium. When cultured for 24 h under aerobic conditions,with the removal rates of the NH4+-N and COD being 82.2% and 74.73%,respectively,strain gs1 will have a nitrification function of producing NO2--N. When cultured for 24 h under aerobic conditions in nitrite medium,the removal rate of the NO2--N became 100%,and when cultured for 24 h under aerobic conditions in nitrate medium,the removal rate of the NO3--N became 97%. The result shows that this strain functions for either nitrification or denitrification,i.e.,it can complete the full process of biological deoxidation.     

HLA-B*6701 as a subtype performing post-selected marking gene for cervical cancer

A method of sequence-based typing (SBT) has been adopted to assort types of exons 2 and 3, which have the most polymorphism, of HLA-B locus of the Tujia nation group in Hubei province. The correlation among the HLA-B alleles, human papillomavirus (HPV) infection and cervical cancer risk has also been investigated. Under the condition of resident location and age, race unified, 100 specimens of cancer patients were sampled as a case group, of which 86 were HPV positive and were screened for HLA-B alleles; while 187 specimens were taken from healthy people, of which 92 were HPV negative as a control group. The result shows that by comparing the above mentioned 86 HPV positive cervical cancer group and 92 HPV negative normal group, it was concluded that HLA-B*6701 was only found in the cervical cancer group (p < 0.034), which shows that HLA-B*6701 can be used as an important candidate biological marking gene for generation of cervical cancer in Wufeng county of Hubei province.     

Measurement study on wind characteristics of Typhoon Kalmaegi on the sutong bridge

The Sutong Bridge, a cable-stayed located in the southeast coastal area of China, is vulnerable to the Pacific typhoons. From the data measured by two 3D ultrasonic anemometers at the height of 76 m and 306 m, the wind characteristics (including 10-minute mean wind speed and direction, turbulence intensity and gust factor, power spectral density and integral scale of turbulence) of Typhoon Kalmaegi are analyzed The comparison of 10-minute mean wind velocity from the two anemometers validates the reliability...     

Some functions with low differential uniformity

We study the functions with low differential uniformity, and concentrates mainly on the properties of perfect nonlinear (PN) functions, including the properties of the derivative of the components of those functions. Some sufficient and necessary conditions have been explored to judge when a function is a PN function. These conditions may be useful in constructing new PN functions. We also construct some functions with differential 4-uniformity that have rarely been studied in the literature. Some of the constructed functions with differential 4-uniformity have high nonlinearity as well. Finally, a class of functions with differential 4-uniformity which are not extended affine equivalent to any power functions are constructed.     

Generalized ridge estimation of a semiparametric regression model

We considered the following semiparametric regres-sion model yi = X iT β+ s ( t i ) + ei (i =1,2,,n). First,the general-ized ridge estimators of both parameters and non-parameters are given without a restrained design matrix. Second,the generalized ridge estimator will be compared with the penalized least squares estimator under a mean squares error,and some conditions in which the former excels the latter are given. Finally,the validity and feasibility of the method is illustrated by a simulation example.     

Congruence permutable Kleene-Stone algebras

A Kleene-Stone algebra is a bounded distributive lattice with two unary operations that make it a Kleene and a Stone algebra. In this paper, we study the properties of the prime ideals in a Kleene-Stone algebra and characterize the class of Kleene-Stone algebras that are congruence permutable by means of the dual space of a Kleene-Stone algebra and then show that a finite Kleene-Stone algebra is congruence permutable if and only if it is isomorphic to a direct product of finitely many simple algebras.