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Search Results: 1 - 10 of 22947 matches for " Jing Lv "
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Development of a Rapid and Simple Non-Derivatization Method to Determine Constituents and Antioxidative Capacity of Camellia Oils by HPTLC  [PDF]
Guang-Ping Lv, Meijun Aoli, Bin Zhou, Jing Zhao
Food and Nutrition Sciences (FNS) , 2013, DOI: 10.4236/fns.2013.48A025
Abstract: Camellia oil is an edible vegetable oil with high value of nutrition and health protection function such as antioxidant and adjusting blood fat. In this study, a simple, rapid and effective HPTLC method was developed for analyzing the composition and antioxidant constituents of camellia oil. The HPTLC was performed on G60 plate with n-hexane-diethyl ether-acetic acid (6:4:0.1, v/v/v) as mobile phase combined with two coloration methods (ethanol containing 10% phosphomolybdic acid, ethanol containing 0.03% DPPH) and scanning densitometry technique. The unsaturated fatty glyceride, free fatty acids, sterols and lipids including triolein, oleic acid, ergosterin, β-sitosterol, tocopherol and phospholipids in camellia oils were determined and performed densitometrically at λs1 = 620 nm and λs2 = 517 nm. The results show that the main components of different samples of camellia oil are similar, however the contents are diverse. The antioxidative test shows that camellia oil has obvious antioxidant capability as olive oil, especially the pressed virgin oil. Therefore, this non-derivatization HPTLC method can be used for composition and antioxidative capacity determination of camellia oils.
Harmonic Solutions of Duffing Equation with Singularity via Time Map  [PDF]
Jing Xia, Suwen Zheng, Baohong Lv, Caihong Shan
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.510146
Abstract:

This paper is devoted to the study of second-order Duffing equation \"\" with singularity at the origin, where \"\" tends to positive infinity as \"\", and the primitive function \"\" as \"\". By applying the phase-plane analysis methods and Poincaré-Bohl theorem, we obtain the existence of harmonic solutions of the given equation under a kind of nonresonance condition for the time map.

RESEARCH ON LASER SOLID FORMING OF A FUNCTIONALLY GRADED TI-TI2ALNB ALLOY

LIN Xin,LV Xiaowei LV,Jing Chen,Weidong Huang,

金属学报 , 2008,
Abstract:
Inflammatory response and insulin signaling alteration induced by PCB77

Jing Wang,Xiaowen Lv,Yuguo Du,

环境科学学报(英文版) , 2010,
Abstract:
The Influence of Low Carbon Economy on Corporate Social Responsibility
Jin Lv,Jing Ma,Jianting Li
Asian Social Science , 2010, DOI: 10.5539/ass.v6n11p233
Abstract: Under low carbon economy environment, as the pioneer of implementing low carbon economy, corporations have to follow current tendency, change ideas, and take their social responsibility actively, so as to win new competitiveness and achieve sustainable development per se. Firstly, we illustrate the positive influence of low carbon economy on corporate social responsibility through elaborating the internal and external pressure that low carbon economy brings to corporations. Then we propose the approaches to be utilized by Chinese corporations to take social responsibility under low carbon economy background. Finally, we call corporations to do something and confront the challenge in low carbon economy age actively.
A coaxial-slot antenna for invasive microwave hyperthermia therapy  [PDF]
Teng Jiao, Hua Wang, Yang Zhang, Xiao Yu, Huijun Xue, Hao Lv, Xijing Jing, Hua Zhan, Jianqi Wang
Journal of Biomedical Science and Engineering (JBiSE) , 2012, DOI: 10.4236/jbise.2012.54026
Abstract: When the technique of invasive microwave hyperthermia is applied to cancer treating, the distribution of microwave thermal field and the effect of the therapy are determined by the type of microwave radiative antenna. The thermal field of biological tissue produced by microwave radiative antenna is investigated in this paper. The distribution of thermal field and specific absorption rate (SAR) of invasive coaxial-slot antenna in the frequency of 2450 MHz are obtained by the technique of finite element analysis. According to the experiment of heating the ex vivo pork liver by this kind of antenna, the result concordant with the theory is obtained. Therefore, it is suggested that this research could be a reference for clinical therapy and operation scheme.
Saw Palmetto-Based Nutritional Supplement Prostataplex Relieves Symptoms of Benign Prostatic Hyperplasia (BPH) in Patients with Mild to Moderate BPH  [PDF]
Qingwen Xie, Jing Leng, Jianwei Lv, Allan Pantuck, Lawrence Yen, Mina Shariff, Kenneth Kami, Jianyu Rao, Rong Shi
Open Journal of Urology (OJU) , 2012, DOI: 10.4236/oju.2012.23018
Abstract: The goal of this study was to assess the efficacy of the saw palmetto-based nutritional supplement, Prostataplex, for relieving the symptoms associated with benign prostatic hyperplasia (BPH) in men with mild to moderate degrees of BPH. A randomized, double-blind, placebo-controlled trial was performed in Shanghai, China. Eighty patients with BPH were randomly assigned to either the intervention group (39 cases) or control group (41 cases). Patients in the intervention group were administered Prostataplex orally and placebos were given to patients in the control group. The duration of treatment was 12 weeks in both groups. Following the intervention of Prostataplex, the maximum urinary flow rates (MFR), total scores of International Prostate Symptom Score (IPSS) and quality of life indicators were significantly better among the patients in the intervention group than those in the control group (P < 0.01 for all variables). Significant improvement of symptoms including dysuria, reducing nocturnal polyuria and increasing urinary flow rate was seen after two months of intervention, especially for the improvement of incomplete bladder emptying. Prostataplex has positive effects on improving symptoms as well as quality of life in men with mild to moderate BPH.
Interaction of Avelox with Bovine Serum Albumin and Effect of the Coexistent Drugs on the Reaction
Baosheng Liu,Chao Yang,Xiaona Yan,Jing Wang,Yunkai Lv
International Journal of Analytical Chemistry , 2012, DOI: 10.1155/2012/408057
Abstract: The interaction between Avelox and bovine serum albumin (BSA) was investigated at different temperatures by fluorescence spectroscopy. Results showed that Avelox could quench the intrinsic fluorescence of BSA strongly, and the quenching mechanism was a static quenching process with F?rester spectroscopy energy transfer. The electrostatic force played an important role on the conjugation reaction between BSA and Avelox. The order of magnitude of binding constants ( ) was 104, and the number of binding site ( ) in the binary system was approximately equal to 1. The binding distance ( ) was less than 3?nm and the primary binding site for Avelox was located in subdomain IIA of BSA. Synchronous fluorescence spectra clearly revealed that the microenvironment of amino acid residues and the conformation of BSA were changed during the binding reaction. In addition, the effect of some antibiotics on the binding constant of Avelox with BSA was also studied. 1. Introduction Most drugs are able to bind to plasma protein when they entrance in blood plasma system of organism, and serum albumin is the most abundant protein in blood plasma and serves as a depot protein and transport protein for numerous endogenous and exogenous compounds [1]. Generally speaking, drugs could bind with serum albumin mostly through the formation of noncovalent complexes reversibly. The drug-protein complex can be regarded as a form of drug in the biology temporary storage, it can effectively avoid drug elimination from metabolism so quickly that it can maintain the total concentration and effective concentrations of blood medicine in plasma. In addition, binding of drugs to plasma proteins controls their free, active concentrations and provides a reservoir for a longer action, the binding of drugs is responsible for the protective role of albumin. Therefore, interaction of a drug with, and competition for, the binding sites on plasma proteins might strongly affect its distribution, elimination, as well as its pharmacodynamics and toxic properties [2]. Competition between two drugs for their binding to plasma protein can strongly affect the drug disposition of both drugs, with possible serious physiological consequences. Binding parameters are indeed fundamental factors in determining the overall pharmacological activity of a drug, and in this context the determination of the binding parameters of drugs to albumin has become essential to understand their pharmacokinetic, pharmacodynamic, and toxicological profile. Avelox is a new generation of fluoroquinolone antibacterial agents, which is
Hypoxia-inducible factor-1α gene polymorphisms and cancer risk: a meta-analysis
Tongfeng Zhao, Jing Lv, Jiangpei Zhao, Marius Nzekebaloudou
Journal of Experimental & Clinical Cancer Research , 2009, DOI: 10.1186/1756-9966-28-159
Abstract: The meta-analysis for 1772 C/T polymorphism included 4131 cancer cases and 5387 controls, and for 1790 G/A polymorphism included 2058 cancer cases and 3026 controls. Allelic and genotypic comparisons between cases and controls were evaluated. Subgroup analyses by cancer types, ethnicity, and gender were also performed. We included prostate cancer in male subgroup, and female specific cancers in female subgroup.For the 1772 C/T polymorphism, the analysis showed that the T allele and genotype TT were significantly associated with higher cancer risk: odds ratio (OR) = 1.29 [95% confidence interval (CI, 1.01, 1.65)], P = 0.04, Pheterogeneity < 0.00001, and OR = 2.18 [95% CI (1.32, 3.62)], P = 0.003, Pheterogeneity = 0.02, respectively. The effect of the genotype TT on cancer especially exists in Caucasians and female subjects: OR = 2.40 [95% CI (1.26, 4.59)], P = 0.008, Pheterogeneity = 0.02, and OR = 3.60 [95% CI (1.17, 11.11)], P = 0.03, Pheterogeneity = 0.02, respectively. For the 1790 G/A polymorphism, the pooled ORs for allelic frequency comparison and dominant model comparison suggested a significant association of 1790 G/A polymorphism with a decreased breast cancer risk: OR = 0.28 [95% CI (0.08, 0.90)], P = 0.03, Pheterogeneity = 0.45, and OR = 0.29 [95% CI (0.09, 0.97)], P = 0.04, Pheterogeneity = 0.41, respectively. The frequency of the HIF-1α 1790 A allele was very low and only two studies were included in the breast cancer subgroup.Our meta-analysis suggests that the HIF-1α 1772 C/T polymorphism is significantly associated with higher cancer risk, and 1790 G/A polymorphism is significantly associated with decreased breast cancer risk. The effect of the 1772 C/T polymorphism on cancer especially exists in Caucasians and female subjects. Only female specific cancers were included in female subgroup, which indicates that the 1772 C/T polymorphism is significantly associated with an increased risk for female specific cancers. The association between the 1790 G/A
Selective unresponsiveness to the inhibition of p38 MAPK activation by cAMP helps L929 fibroblastoma cells escape TNF-α-induced cell death
Jing Wang, Ruihong Tang, Ming Lv, Jiyan Zhang, Beifen Shen
Molecular Cancer , 2010, DOI: 10.1186/1476-4598-9-6
Abstract: Intracellular cAMP was determined in L929 fibroblastoma cells after treatment of the cells with various cAMP elevation agents. Effects of cAMP in the presence or absence of the RNA synthesis inhibitor actinomycin D or small interfering RNAs (siRNAs) against CREB on TNF-α-induced cell death in L929 cells were measured by propidium iodide (PI) staining and subsequent flow cytomety. The activation of p38 and c-Jun N-terminal protein kinase (JNK), another member of MAPK superfamily, was analyzed by immunoblotting. JNK selective inhibitor D-JNKi1 and p38 selective inhibitor SB203580 were included to examine the roles of JNK and p38 in this process. The expression of DLC or other mediators of cAMP was analyzed by immunoblotting. After ectopic expression of DLC with a transfection marker GFP, effects of cAMP on TNF-α-induced cell death in GFP+ cells were measured by PI staining and subsequent flow cytomety.Elevation of cAMP suppressed TNF-α-induced necrotic cell death in L929 fibroblastoma cells via CREB-mediated transcription. The pro-survival role of cAMP was associated with selective unresponsiveness of L929 cells to the inhibition of p38 activation by cAMP, even though cAMP significantly inhibited the activation of JNK under the same conditions. Further exploration revealed that the induction of DLC, the major mediator of p38 inhibition by cAMP, was impaired in L929 cells. Enforced inhibition of p38 activation by using p38 specific inhibitor or ectopic expression of DLC reversed the protection of L929 cells by cAMP from TNF-α-induced cell death.These data suggest that the lack of a pro-apoptotic pathway in tumor cells leads to a net survival effect of cAMP.It is known that persistent stress and depression, which leads to continuously elevated levels of stress hormones such as epinephrine, may increase tumor incidence and promote metastatic growth. Cyclic AMP (cAMP) is the first identified intracellular mediator (second messenger) of hormone action. The downstream effec
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