Search results for: Kefeng Li

Items from 1 to 20 out of 79 results

article

Field observations of the lethality characteristics of endangered and endemic fish under the stress of total dissolved gas supersaturation

Quan Yuan, Yuanming Wang, Ruifeng Liang, Jingjie Feng, more

River Research and Applications > 37 > 8 > 1156 - 1167

Total dissolved gas supersaturation (TDGS) caused by high dam discharge may threaten the survival of fish downstream. This study investigated the TDGS of Dadu River in the first 3 years (2016–2018) after the operation of Dagangshan hydropower station. The effect of TDGS on endemic fish was also evaluated for the first time in this study. Schizothoracin prenanti, Schizothorax davidi and Leptobotia elongata...

article

Tolerance and avoidance mechanisms of the rare and endemic fish of the upper Yangtze River to total dissolved gas supersaturation by hydropower stations

Yuanming Wang, Ruifeng Liang, Kefeng Li, Ran Li

River Research and Applications > 36 > 7 > 993 - 1003

Several superhigh dams (greater than 200 m in height) and many high dams have been built in the upper Yangtze River basin in recent years, and these dams have made total dissolved gas (TDG) supersaturation a serious environmental problem. A few studies have examined the tolerance and avoidance characteristics of rare and endemic fish in TDG‐supersaturated water in the upper Yangtze River over the...

article

Cross-pose face recognition by integrating regression iteration and interactive subspace

Kefeng Li, Quanzhen Huang

EURASIP Journal on Wireless Communications and Networking > 2019 > 2019 > 1 > 1-8

At present, the pose change of the face test sample is the main reason that affects the accuracy of face recognition, and the design of cross-pose recognition algorithm is a technical problem to be solved. In this paper, a cross-pose face recognition algorithm which integrates the regression iterative method and the interactive subspace method was proposed, and through the regression iteration, the...

article

Sphingomyelin phosphodiesterase 1 (SMPD1) mediates the attenuation of myocardial infarction-induced cardiac fibrosis by astaxanthin

Yu Shi, Peng Lin, Xiaoning Wang, Guangmei Zou, more

Biochemical and Biophysical Research Communications > 2018 > 503 > 2 > 637-643

Uncontrolled cardiac fibrosis following myocardial infarction (MI) is a critical pathological change leading to heart failure. Current pharmacotherapies are limited by unsatisfactory efficacy and undesired systemic side effects. Astaxanthin (ASX) is a natural carotenoid with strong antioxidant and anti-inflammatory activities. The effects of ASX on MI-induced cardiac fibrosis and the underlying mechanisms...

article

Operational regulation of a hydropower cascade based on the mitigation of the total dissolved gas supersaturation

Jingjie Feng, Lin Wang, Ran Li, Kefeng Li, more

Ecological Indicators > 2018 > 92 > C > 124-132

Spillway discharge leads to total dissolved gas (TDG) supersaturation in the plunge pool, and these gases cannot dissipate to restore equilibrium after traveling tens or even hundreds of kilometers downstream of the spillway. Supersaturated TDG is detrimental to fish and may cause gas bubble disease. The negative impact is enhanced when cascade reservoirs are in operation. Field observations of the...

article

Mechanical properties of individual core-shell-structured SnO₂@C nanofibers investigated by atomic force microscopy and finite element method

Xing Liu, KeFeng Li, XiaoLu Duan, YuTing Huang, more

Science China Technological Sciences > 2018 > 61 > 8 > 1144-1149

Although SnO₂-based nanomaterials used to be considered as being extraordinarily versatile for application to nanosensors, microelectronic devices, lithium-ion batteries, supercapacitors and other devices, the functionalities of SnO₂-based nanomaterials are severely limited by their intrinsic vulnerabilities. Facile electrospinning was used to prepare SnO₂ nanofibers coated with a protective carbon...

article

Metabolomics profiling of cleidocranial dysplasia

Zhaoqiang Zhang, Kefeng Li, Mengdie Yan, Qiuping Lin, more

Clinical Oral Investigations > 2019 > 23 > 3 > 1031-1040

Objectives Cleidocranial dysplasia (CCD) is a rare autosomal-dominantly inherited skeletal dysplasia that is predominantly associated with heterozygous mutations of RUNX2. However, no information is available regarding metabolic changes associated with CCD at present. Materials and methods We analyzed members of a CCD family and checked for mutations in the RUNX2 coding sequence using the nucleotide...

article

Effects of dam reconstruction on thermal-ice regime of Fengman Reservoir

Youcai Tuo, Yun Deng, Jia Li, Nan Li, more

Cold Regions Science and Technology > 2018 > 146 > C > 223-235

A laterally-averaged 2D water temperature model coupled with an ice cover module was used to investigate the influences of the Fengman Dam reconstruction on its thermal regime. Variations of the thermal-ice regime and outflow temperature under typical hydro-metrological conditions were simulated and validated with field data. Due to the partial dismantling of the old dam after the reconstruction,...

article

Comparative metabolic profiling of vetiver (Chrysopogon zizanioides) and maize (Zea mays) under lead stress

Venkataramana R. Pidatala, Kefeng Li, Dibyendu Sarkar, Ramakrishna Wusirika, more

Chemosphere > 2018 > 193 > C > 903-911

Lead (Pb) contamination of residential soils in United States is attributed to use of Pb based paints prior to 1978 and their deterioration and accumulation in surface soils. Exposure to Pb due to ingestion and inhalation of Pb laden soil and dust causes neurological disorders, renal disorders, developmental and behavioral problems, particularly in children under the age of six. Vetiver grass is one...

article

Recent advances in vitamins analysis by capillary electrophoresis

Xu Wang, Kefeng Li, Liping Yao, Chunling Wang, more

Journal of Pharmaceutical and Biomedical Analysis > 2018 > 147 > C > 278-287

Vitamins are essential molecules required for human metabolism such as energy production, immune system and cell formation. Accurate vitamin analysis is critical for disease diagnosis, nutrients assessment, as well as food and drug production. This review gives an overview of the recent developments in the use of capillary electrophoresis combined with different detection techniques for the analysis...

article

R-Lambda model based CTU-level rate control for intra frames in HEVC

Peng Wang, Cui Ni, Guangyuan Zhang, Kefeng Li

Multimedia Tools and Applications > 2019 > 78 > 1 > 125-139

In High Efficiency Video Coding (HEVC), the coding efficiency of intra frames is much lower than inter frames. If the bits allocated to intra frames are not sufficient to improve their quality, the quality fluctuation between intra frames and their neighboring inter frames will appear. But if too many bits are allocated to intra frames, the other frames may get bits starvation, which will cause quality...

article

Light irradiation helps magnetotactic bacteria eliminate intracellular reactive oxygen species

Kefeng Li, Pingping Wang, Chuanfang Chen, Changyou Chen, more

Environmental Microbiology > 19 > 9 > 3638 - 3648

Magnetotactic bacteria (MTB) demonstrate photoresponse. However, little is known about the biological significance of this behaviour. Magnetosomes exhibit peroxidase‐like activity and can scavenge reactive oxygen species (ROS). Magnetosomes extracted from the Magnetospirillum magneticum strain AMB‐1 show enhanced peroxidase‐like activity under illumination. The present study investigated the effects...

article

A robust, single-injection method for targeted, broad-spectrum plasma metabolomics

Kefeng Li, Jane C. Naviaux, A. Taylor Bright, Lin Wang, more

Metabolomics > 2017 > 13 > 10 > 1-12

Background Metabolomics is a powerful emerging technology for studying the systems biology and chemistry of health and disease. Current targeted methods are often limited by the number of analytes that can be measured, and/or require multiple injections. Methods We developed a single-injection, targeted broad-spectrum plasma metabolomic method on a SCIEX Qtrap 5500 LC-ESI-MS/MS platform. Analytical...

article

Plasma Phospholipids and Sphingolipids Identify Stent Restenosis After Percutaneous Coronary Intervention

Song Cui, Kefeng Li, Lawrence Ang, Jinghua Liu, more

JACC: Cardiovascular Interventions > 2017 > 10 > 13 > 1307-1316

The aim of this study was to evaluate the diagnostic utility of plasma metabolomic biomarkers for in-stent restenosis (ISR).ISR remains an issue for patients after percutaneous coronary intervention. Identification of biomarkers to predict ISR could be invaluable for patient care.Next-generation metabolomic profiling was performed in the discovery phase from the plasma of 400 patients undergoing percutaneous...

article

Utility of Spot Urine Specimens to Assess Tubular Secretion

Pranav S. Garimella, Kefeng Li, Jane C. Naviaux, Michael G. Shlipak, more

American Journal of Kidney Diseases > 2017 > 69 > 5 > 709-711

article

Effect of aerobic exercise intervention on DDT degradation and oxidative stress in rats

Kefeng Li, Xiaohua Zhu, Yuzhan Wang, Shuqian Zheng, more

Saudi Journal of Biological Sciences > 2017 > 24 > 3 > 664-671

Dichlorodiphenyltrichloroethane (DDT) reportedly causes extensively acute or chronic effects to human health. Exercise can generate positive stress. We evaluated the effect of aerobic exercise on DDT degradation and oxidative stress.Main methods: Male Wistar rats were randomly assigned into control (C), DDT without exercise training (D), and DDT plus exercise training (DE) groups. The rats were treated...

article

Shelter construction for fish at the confluence of a river to avoid the effects of total dissolved gas supersaturation

Xia Shen, Ran Li, Juping Huang, Jingjie Feng, more

Ecological Engineering > 2016 > 97 > C > 642-648

Total dissolved gas (TDG) supersaturation downstream has a negative environmental effect on fishes. It is caused by discharge from high dams and increases the incidence of gas bubble disease and fish mortality. Downstream of a high dam, there is an area with low TDG saturation due to the gradual mass exchange of gases between the separation zone and the mainstream and the long retention time in the...

article

Operational regulation of water replenishment to reduce supersaturated total dissolved gas in riverine wetlands

Qian Ma, Ruifeng Liang, Ran Li, Jingjie Feng, more

Ecological Engineering > 2016 > 96 > C > 162-169

Natural flood regimes have been altered with an increasing number of high dams constructed in the upstream stretches of rivers. The voluntary and involuntary flood discharges of reservoirs have become the primary water replenishment source for riverine wetlands. Supersaturation of total dissolved gas (TDG) in the flood discharge from high dams may seriously affect the survival of fish and aquatic...

article

A habitat similarity model based on vague sets to assess Schizothorax prenanti spawning habitat

Leilei Qin, Kefeng Li, Yong Li, Ruifeng Liang, more

Ecological Engineering > 2016 > 96 > C > 86-93

Schizothorax prenanti (S. prenanti) is a second-class provincial protected endemic fish within the upper reaches of the Min River. The spawning season of S. prenanti extends from March to April. Habitat alteration and the construction of multistage dams have resulted in a rapid decline of the S. prenanti population. To assess the potential effects of a reduced flow volume on the S. prenanti spawning...

chapter

DHV Image Registration Using Boundary Optimization

Jiali Cui, Yiding Wang, Kefeng Li

Lecture Notes in Computer Science > Advanced Intelligent Computing Theories and Applications > Special Session on New Hand-Based Biometric Methods > 499-506

An image registration method using boundary optimization is proposed to register dorsal-hand vein (DHV) images of different rotation angles. Since image rotation is inevitable during image capture, the proposed method is important in human identification based on DHV images. The proposed method consists of two main procedures, i.e., boundary detection and boundary optimization. Boundary detection...

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Search results for: Kefeng Li

Field observations of the lethality characteristics of endangered and endemic fish under the stress of total dissolved gas supersaturation

Tolerance and avoidance mechanisms of the rare and endemic fish of the upper Yangtze River to total dissolved gas supersaturation by hydropower stations

Cross-pose face recognition by integrating regression iteration and interactive subspace

Sphingomyelin phosphodiesterase 1 (SMPD1) mediates the attenuation of myocardial infarction-induced cardiac fibrosis by astaxanthin

Operational regulation of a hydropower cascade based on the mitigation of the total dissolved gas supersaturation

Mechanical properties of individual core-shell-structured SnO₂@C nanofibers investigated by atomic force microscopy and finite element method

Metabolomics profiling of cleidocranial dysplasia

Effects of dam reconstruction on thermal-ice regime of Fengman Reservoir

Comparative metabolic profiling of vetiver (Chrysopogon zizanioides) and maize (Zea mays) under lead stress

Recent advances in vitamins analysis by capillary electrophoresis

R-Lambda model based CTU-level rate control for intra frames in HEVC

Light irradiation helps magnetotactic bacteria eliminate intracellular reactive oxygen species

A robust, single-injection method for targeted, broad-spectrum plasma metabolomics

Plasma Phospholipids and Sphingolipids Identify Stent Restenosis After Percutaneous Coronary Intervention

Utility of Spot Urine Specimens to Assess Tubular Secretion

Effect of aerobic exercise intervention on DDT degradation and oxidative stress in rats

Shelter construction for fish at the confluence of a river to avoid the effects of total dissolved gas supersaturation

Operational regulation of water replenishment to reduce supersaturated total dissolved gas in riverine wetlands

A habitat similarity model based on vague sets to assess Schizothorax prenanti spawning habitat

DHV Image Registration Using Boundary Optimization

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