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21篇 您的检索式:作者名="Keyong Zhang"
    题名 作者 年代 出处 被引量
1Green Production Technology of the Monomer of Nylon-6: Caprolactam显示文摘Baoning Zong Bin Sun Shibiao Cheng Xuhong Mu Keyong Yang Junqi Zhao Xiaoxin Zhang Wei Wu 2017Engineering2017,3,3:9
2Electrospinning and Crosslinking of COL/PVA Nanofiber-microsphere Containing Salicylic Acid for Drug Delivery显示文摘Xiaoli Zhang Keyong Tang Xuejing Zheng 2016Journal of Bionic Engineering2016,13,1:4
3Age,Genesis,and Tectonic Setting of the Mo-W Mineralized Dongshanwan Granite Porphyry from the Xilamulun Metallogenic Belt,NE China显示文摘The Xilamulun molybdenum polymetallic metallogenic belt in eastern Inner Mongolia forms one of the most important Mo metallogenic belts in northeastern China. The Dongshanwan porphyry Mo-W polymetallic deposit, in the northeastern part of the Xilamulun metallogenic belt, occurs along the periphery of a granite porphyry and consists of Mo-W-Ag sulfide and oxide disseminations and veinlets in hydrothermal assemblages. LA-ICP-MS zircon U-Pb dating of the Dongshanwan granite porphyry yields a crystallization age of 142.15± 0.91 Ma, whereas molybdenite Re-Os isotopic dating model ages are of 139.9–141.5 Ma and an isochron age is of 140.5± 3.2 Ma(MSWD=1.2). The age consistency indicates that the Dongshanwan deposit was a product of Early Cretaceous magmatism. The Dongshanwan granite porphyry is a high-alkali high-potassium intrusion and has high SiO_2(75.39 wt.%–76.15 wt.%), low Al_2O_3(12 wt.%–13 wt.%), Ba, Ti, P, and Sr contents, with negative Eu anomalies. The Y/Nb ratios are comparable to those of average continental crust and island arc basalts, corresponding to type-A2 granites. Our geochemical data indicate that the granite porphyry emplaced in an Early Cretaceous post-orogenic extensional environment following Mongol-Okhotsk oceanic subduction and subsequent continental collision.Xuebing Zhang Keyong Wang Chengyang Wang Wen Li Qi YU Yicun Wang Jianfeng Li Duo Wan Guanghuan Huang 2017Journal of Earth Science2017,28,3:4
4Experimental and Numerical Study of an 80-kW Zigzag Printed Circuit Heat Exchanger for Supercritical CO_(2)Brayton Cycle显示文摘In this study,an experimental system was built to investigate the global performance of an 80-k W zigzag printed circuit heat exchanger(PCHE).It could meet the requirement of the pre-cooler for the supercritical carbon dioxide(S-CO_(2))Brayton power cycle and the modified effectiveness considering the pinch point is between 61.5%and 79.3%.When the outlet S-CO_(2)temperature is near the pseudo-critical point,the thermo-physical properties have more effects on heat transfer performance compared to flow characteristics.For the local performance,the mass flow rates of both sides have crucial influences on the location where the peak of S-CO_(2)Nusselt number occurs while only the S-CO_(2)flow rate affects the variation of the peak value.In addition,the influence of the radius of curvature on the secondary-flow should not be ignored.In the end,new empirical correlations were proposed considering the drastic variations of the Prandtl number.ZHANG Huzhong CHENG Keyong HUAI Xiulan ZHOU Jingzhi GUO Jiangfeng 2021Journal of Thermal Science2021,30,4:3
5Thermodynamic Functions and Phase Transformation of Metal Nanocrystals显示文摘A model to calculate the thermodynamic functions of the pure metal nanocrystals has been developed, with theconsideration of the effects of both the interfaces and the crystal in the nano-grain interior. As an example, theenthalpy, entropy and Gibbs free energy, as functions of the excess free volume at interfaces, temperature and grainsize, are calculated for the Co nanocrystals. Furthermore, the characteristics of phase transformationare studied, and the transformation temperatures at different levels of grain size, as well as the critical grain sizes atdifferent temperatures, are predicted. The calculation results show that, the nano-grained β-Co (fcc) is thermody-namically stable at temperatures much lower than that for the conventional coarse-grained materials, and may alsostably exist at room temperature when the grain size is reduced to be small enough. The present model is verifiedby comparisons between the experimental findings and the theoretical predictions.Jinping GAO, Xiaoyan SONG , Jiuxing ZHANG, Keyong YANG and Xuemei LIUCollege of Materials Science and Engineering, the Key Laboratory of Advanced Functional Materials of the Education Ministry,Beijing University of Technology, Beijing 100022, China 2005Journal of Materials Science & Technology2005,21,5:2
6Tumor - associated circulating microRNAs as biomarkers of cancer 显示文摘Wang Jin Zhang Keyong Liu Songmei 2014Molecules2014,19,2:1
7Error analysis and test study of fiber optic gyroscope north-finder 显示文摘Zhang Zhijun Sun Jiyu Wu Keyong 2005Proceedings of SPIE2005,,5634:1
8Effects of therapeutic mild hypothermia on patients with severe traumatic brain injury after craniotomy显示文摘Wusi Qiu Ying Zhang Hong Sheng Jianmin Zhang Weiming Wang Weiguo Liu Keyong Chen Junfu Zhou Zefeng Xu 2007Journal of Critical Care2007,,3:1
9Food Supply Values and Their Factors of Three Pond Aquaculture Ecosystems: A Case Study of Shanghai显示文摘Studies on food supply values,the basis of eco-service values,and their factors of different pond aquaculture ecosystems are helpful to explain the influences of the inputted factors and their variations among these ecosystems and provide information for stakeholders to adjust their decisions and behaviors to increase their total eco-service values. On the basis of continued records from 2011 to 2012 of 18 ponds of three pond aquaculture ecosystems,namely Litopenaeus vannamei,Macrobrachium nippponensis and carp fresh water pond aquaculture ecosystems in Qingpu,Fengxian,and Jiading,three suburban districts of Shang,this paper analyzed the costs,returns,net food supply values and their regional and temporal fluctuations. The results showed that:(1) the net food supply values of the three ecosystems are 143252. 4,135883. 7,and 52623. 1Yuan /Ha in 2011 correspondently,with the Litopenaeus vannamei pond aquaculture ecosystem(LVPAE) ranking highest and the carp pond aquaculture ecosystem(CPAE) lowest among them,and the trend was same in 2012,but the values decreased than that of 2011 with the rate of 30. 0%( LVPAE),38. 0 %( Macrobrachium nippponensis pond aquaculture ecosystem,MNPAE) and 13. 7 %( CPAE).(2)The dominant factors of the net food supply values of these ecosystems are the produce price and variable costs; fry and feed costs are the main variable factors producing the noticeable difference among the ecosystems.(3) The cost- benefit ratio of per unit product of the CPAE,LVPAE and MNPAE changed from 27. 5%,91. 7%,129. 0% in 2011 to 23. 0%,73. 8% and 63. 8% in 2012,with the CPAE ranked lowest among them in both years.(4) For all the three ecosystems,their net food supply values may not always change in same trends with their net eco-service values,if stakeholders want to keep a balance between these two types of values,MNPAE should be encouraged in these districts.Zhengyong YANG Xinzheng ZHANG Zhenfang HAN Keyong TANG 2014Asian Agricultural Research2014,6,8:0
10The bacterial small RNAs: The new biomarkers of oral microbiotaassociated cancers and diseases显示文摘The oral microbiota is a vital part of the human microbiota that functions in various physiological processes and ishighly relevant to cancers and other diseases. With the alterations of host immune competence, the homeostatic balanceexisting between the oral microbiota and host may be disturbed and result in the development of diseases. Numerousobservations have suggested that small RNAs are key regulators of bacterial pathogenesis and bacteria-host interactions.Further, bacterial small RNAs are considered to be promising biomarkers for the development of novel, and efficacioustherapies for oral dysbiosis. Mechanistic insights into how oral pathogens communicate with other bacteria or host cellsin oral cancers via small RNAs are hot topics of research. Current studies also have begun to elucidate the key role oforal microbiota in the development of systemic diseases. This article discusses existing findings and nascent mechanismsgoverning the small RNA-based interactions between oral microbiota and associated diseases. The knowledge of suchinteractions is key in planning approaches to reverse dysbiosis to achieve health.MENGYING MAO TING DONG YANJING LIANG KEYONG YUAN QIAOQIAO JIN PENGFEI ZHANG ZHENGWEI HUANG 2023BIOCELL2023,47,10:0
11Purification and Identification of a Clotting Protein from the Hemolymph of Chinese Shrimp (Fenneropenaeus chinensis)显示文摘The clotting protein(CP) plays important and diverse roles in crustaceans,such as coagulation and lipid transportation.A clotting protein was purified from the hemolymph of Chinese shrimp Fenneropenaeus chinensis(named as Fc-CP) with Q sepharose HP anion-exchange chromatography and phenyl sepharose HP hydrophobic interaction chromatography.Fc-CP was able to form stable clots in vitro in the presence of hemocyte lysate and Ca2+,suggesting that the clotting reaction is catalyzed by a Ca2+-dependent transglutaminase in shrimp hemocytes.The molecular mass of Fc-CP was 380 kDa under non-reducing conditions and 190 kDa under reducing conditions as was determined with SDS-PAGE.CP exists as disulfide-linked homodimers and oligomers.The N-terminal amino acid sequence of Fc-CP was identical to that of shrimps including Penaeus monodon,Farfantepenaeus paulensis and Litopenaeus vannamei;and similar to that of other decapods.The purified Fc-CP was digested with trypsin and verified on an ABI 4700 matrix-assisted laser desorption/ionization tandem time-of-flight(MALDI-TOF/TOF) mass spectrometry.Our results will aid to better understanding the coagulation mechanism of shrimp hemolymph.WANG Baojie PENG Hongni LIU Mei JIANG Keyong ZHANG Guofan WANG Lei 2013Journal of Ocean University of China2013,12,3:0
12A combined kinetic study on the pyrolysis of chrome shavings by thermogravimetry显示文摘Chrome shavings(CS),a kind of solid wastes discharged from tanneries,always pose serious environmental problems due to the presence of chromium.In this work,kinetic study of the pyrolysis of CS was investigated using a thermogravimetric analyzer in nitrogen atmosphere.The results obtained from the thermogravimetric analysis indicated that there are three stages in the temperature range 25 to 600℃.The second stage is the main weight loss stage and it could be mainly attributed to the pyrolysis of collagenous materials.Iso-conversional and generalized master-plots method were first employed to estimate the activation energy value and possible reaction mechanism of CS pyrolysis.The results showed that the pyrolysis process could not be described accurately by single-step reaction due to the heterogeneous nature of CS.Afterwards,the thermogravimetric kinetic of CS pyrolysis was studied using combined kinetic analysis.It was found that three-parallel-reaction model allowed better fitting relevance for CS pyrolysis.This information was important for simulating and predicting the pyrolysis behaviors of CS.Jie Liu Lan Luo Zonghui Zhang Yadi Hu Fang Wang Xiumin Li Keyong Tang 2020Carbon Resources Conversion2020,3,1:0
13Numerical Investigation on Flow and Heat Transfer Performance of Supercritical Carbon Dioxide Based on Variable Turbulent Prandtlnumber Model显示文摘Flow and heat transfer characteristic of supercritical carbon dioxide(SCO_(2))are numerically investigated in the horizontal and vertical tubes.TWL turbulent Prandtl number model could well describe the behavior of SCO_(2) affected by the buoyancy.Under the cooling condition,the heat transfer performance of SCO_(2) along the upward direction is best and that along the downward direction is worst when bulk fluid temperatures are below the pseudocritical temperature.Reducing the ratio of heat flux to mass flux could decrease the difference of convective heat transfer coefficient in three flow directions.Under the heating condition,heat transfer deterioration only occurs in vertical upward and horizontal flow directions.Heat transfer deterioration of SCO_(2) could be delayed by increasing the mass flux and the deterioration degree is weakened in the second half of tube along the vertical upward flow direction.Compared with the straight tube,the corrugated tube shows better comprehensive thermal performance.Xiaokai LIU Haiyan ZHANG Keyong CHENG Xiulan HUAI Haiyan LIAO Zhongmei ZHANG 2021Mechanical Engineering Science2021,3,2:0
14Review on herbal tea as a functional food:classification,active compounds,biological activity,and industrial status显示文摘Most herbal tea infusions use edible medicinal plants as raw material and are consumed daily.Although herbal tea has a long history of health care applications worldwide,there is a lack of systematic research on the classification and functional nutritional value of various herbal teas.In recent years,the discovery of the rich biological activities and health benefits of herbal tea has become a driving force for researchers interested in its development as a functional food.However,the shortcomings of herbal tea products are not fully known.In particular,the quality evaluation system is not perfect,and there is insufficient data on the mechanism of action of herbal teas in their traditional uses.To better understand the functions and mechanisms of various herbal teas,this article reviews the classification,effective chemical composition,main biological activities,and mechanism of action of herbal teas.Finally,the current advantages,limitations,and direction of future development of herbal tea are determined and discussed.Yuchao Liu Chunyan Guo Erhuan Zang Ruyu Shi Qian Liu Min Zhang Keyong Zhang Minhui Li 2023Journal of Future Foods2023,3,3:0
15Chronology and Geochemistry of the Berezitovoe Polymetallic Gold Deposit in Eastern Siberia, Russia and its Geological Significance显示文摘The Berezitovoe deposit is a large-sized Au-Ag-Zn-Pb deposit in the east of the SelengaStanovoi superterrane, Russia. Au-Ag orebodies are hosted by tourmaline-garnet-quartz-muscovite metasomatic rocks; Zn-Pb orebodies are hosted by granodiorites, porphyritic granites and tourmalinegarnet-quartz-muscovite metasomatic rocks. These orebodies are surrounded by wall rocks dominated by the Tukuringra Complex granodiorites, porphyritic granites, and gneissic granodiorites. The alteration includes silicification and garnet, sericitization chloritization, carbonatization and kaollinization. LA-ICP-MS U-Pb zircon dating indicates that the gold mineralization can be divided into two stages in the Berezitovoe polymetallic gold deposit(at 363.5 ± 1.5 Ma, and133.4± 0.5).Hornblende-plagioclase gneisses of the Mogocha Group in the study area underwent Paleoproterozoic metamorphism(at 1870 ± 7.8 and 2400 ± 13 Ma), gneissic granodiorite of the Tukuringra Complex yields a late Paleozoic magmatic age(at 379.2 ± 1.1 Ma),and subalkaline porphyritic granitoid of the Amudzhikan Complex yield late Mesozoic magmatic ages(133-139 and 150-163 Ma). Granodiorites of the Tukuringra Complex in the study area have high concentrations of SiO_2(average of 60.9 wt%), are aluminum-oversaturated(average A/CNK of 1.49), are enriched in the large ion lithophile elements(e.g.,K, Rb, and Ba), U, Th, and Pb, are depleted in high field strength elements(e.g., Ta, Nb, and Ti), and have slightly negative Eu and no Ce anomalies in chondrite-normalized rare earth element diagrams.Fluid inclusions from quartz veins include three types: aqueous two-phase, CO_2-bearing three-phase,and pure CO_2. Aqueous two-phase inclusions homogenize at 167℃-249℃ and have salinities of 4.32%-9.47% NaCl equivalent, densities of 0.86-0.95 g/cm^3, and formed at depths of 0.52-0.94 km. In comparison, the C0_2-bearing three-phase inclusions have homogenization temperatures of 265℃-346℃,salinities of 7.14%-11.57% NaCl equivalent, and total densities of 0.62-0.67 g/cm^3. The geochemical and zircon U-Pb data and the regional tectonic evolution of the study area, show that the Berezitovoe polymetallic gold deposit formed in an island arc or active continental margin setting, most probably related to late Paleozoic subduction of Okhotsk Ocean crust beneath the Siberian Plate.ZHANG Guobin YANG Yanchen Alexander S.VAKH Vadim G. KHOMICH WANG Keyong YE Songqing HAN Shijiong 2017Acta Geologica Sinica(English Edition)2017,91,5:0
16Research on the Design and Education of Serious Network Security Games显示文摘Through the correct teaching and game design,not only can innovation be carried out,but the highly effective network security teaching and the training solution countermeasure can also develop the student’s correct social behavior and value idea.Furthermore,through rule design and role play,students can improve the overall level of network security awareness and enhance their sense of cooperation during their studies.This paper defines the concept of a serious game and its significance to the network security curriculum of schools and designs the corresponding card game according to the feature of network security.The purpose of this paper is to strengthen overall network security awareness,cultivate professional skills,and enhance network security.Keyong Wang Pei Wang Yuanheng Zhang Dequan Yang 2022国际计算机前沿大会会议论文集2022,,2:0
17Prevalence of familial hypercholesterolemia and its association with coronary artery disease:A Chinese cohort study显示文摘Background:Familial hypercholesterolemia(FH)is underrecognized,and its association with coronary artery disease(CAD)remains limited,especially in China.We aimed to investigate the prevalence of FH and its relationship with CAD in a large Chinese cohort.Methods:FH was defined using the Make Early Diagnosis to Prevent Early Death(MEDPED)criteria.The crude and age-sex standardized prevalence of FH were calculated based on surveys of the Prediction for Atherosclerotic Cardiovascular Disease Risk in China(China-PAR)project during 2007−2008.The associations of FH with incident CAD and its major subtypes were estimated with the cohort-stratified multivariate Cox proportional hazard models based on the data from the baseline to the last follow-up(2018−2020).Results:Among 98,885 included participants,190 participants were defined as FH.Crude and age−sex standardized prevalence and 95%confidence interval(CI)of FH were 0.19%(0.17%-0.22%)and 0.13%(0.10%-0.16%),respectively.The prevalence varied across age groups and peaked in the group of 60-<70 years(0.28%),and the peak prevalence(0.18%)in males was earlier,yet lower than the peak crude prevalence in females(0.41%).During a mean follow-up of 10.7 years,2493 cases of incident CAD were identified.After multivariate adjustment,FH patients had a 2.03-fold greater risk of developing CAD compared to non-FH participants.Conclusions:The prevalence of FH was estimated to be 0.19%in the participants,and it was associated with an elevated risk of incident CAD.Our study suggests that early screening of FH has certain public health significance for the prevention of CAD.Xiapikatijiang Aihaiti Shufeng Chen Jianxin Li Zhennan Lin Qingmei Cui Xue Xia Fangchao Liu Chong Shen Dongsheng Hu Keyong Huang Yingxin Zhao Fanghong Lu Xiaoqing Liu Jie Cao Ling Yu Ying Li Huan Zhang Zhenyan Fu Liancheng Zhao Jianfeng Huang Dongfeng Gu Xiangfeng Lu 2023Chronic Diseases and Translational Medicine2023,9,2:0
18Translocation of telomerase reverse transcriptase coincided with ATP release in postnatal cochlear supporting cells显示文摘The spontaneous bursts of electrical activity in the developing auditory system are derived from the periodic release of adenosine triphosphate(ATP)by supporting cells in the Kölliker’s organ.However,the mechanisms responsible for initiating spontaneous ATP release have not been determined.Our previous study revealed that telomerase reverse transcriptase(TERT)is expressed in the basilar membrane during the first postnatal week.Its role in cochlear development remains unclear.In this study,we investigated the expression and role of TERT in postnatal cochlea supporting cells.Our results revealed that in postnatal cochlear Kölliker’s organ supporting cells,TERT shifts from the nucleus into the cytoplasm over time.We found that the TERT translocation tendency in postnatal cochlear supporting cells in vitro coincided with that observed in vivo.Further analysis showed that TERT in the cytoplasm was mainly located in mitochondria in the absence of oxidative stress or apoptosis,suggesting that TERT in mitochondria plays roles other than antioxidant or anti-apoptotic functions.We observed increased ATP synthesis,release and activation of purine signaling systems in supporting cells during the first 10 postnatal days.The phenomenon that TERT translocation coincided with changes in ATP synthesis,release and activation of the purine signaling system in postnatal cochlear supporting cells suggested that TERT may be involved in regulating ATP release and activation of the purine signaling system.Our study provides a new research direction for exploring the spontaneous electrical activity of the cochlea during the early postnatal period.Yukai Zhang Keyong Tian Wei Wei Wenjuan Mi Fei Lu Zhenzhen Liu Qingwen Zhu Xinyu Zhang Panling Geng Jianhua Qiu Yongli Song Dingjun Zha 2024Neural Regeneration Research2024,19,5:0
19Application of HACCP in Producting Process of Tartary Buckwheat显示文摘Yongping SONG keyong ZHANG Pengyan XIE Min GUO 2018Agricultural Biotechnology2018,7,2:0
20Longitudinal association of egg consumption habits with blood lipids among Chinese adults: results from the Prediction for Atherosclerotic Cardiovascular Disease Risk in China project显示文摘To the Editor:According to guidelines from western countries as well as China,dietary patterns with low intake of cholesterol have been widely recommended for maintaining ideal lipid levels.As one of the major sources of both high-quality protein and dietary cholesterol,eggs have always been the focus in terms of diet.Although increased lipid levels induced by high egg intake have been revealed by randomized controlled trials(RCTs),they may not be sufficient to reflect the impacts of habitual egg intake due to high doses of egg intake of more than 7 eggs/week or even 14 eggs/week.Further,RCTs typically have shorter intervention periods of about 3 months,which may not observe a stable association due to homeostasis in cholesterol metabolism of human beings.[1,2]Up to now,only three cohorts assessed the associations of egg intake with lipid levels or dyslipidemia,and the findings were still controversial.One recent cohort study has reported the non-significant association between higher egg intake(≥7 vs.1 eggs/week)and lipid profiles.On the other hand,another cohort from Spain found that compared with<1 egg/week,>4 eggs/week had no significant influence on total cholesterol(TC)and triglyceride(TG),but significantly decreased high-density lipoprotein cholesterol(HDL-C)levels.[4]However,none of these cohorts were from developing countries,and the association between moderate egg intake and lipid profiles has not been well illustrated.Egg consumption in China,a representative of developing countries,is relatively higher,and it may be possible to better explore the appropriate range of egg intake.Xinyu Zhang Fangchao Liu Jianxin Li Sihan Huang Xue Xia Keyong Huang Qiong Liu Jichun Chen Xueli Yang Xiaoqing Liu Jie Cao Chong Shen Ling Yu Yingxin Zhao Ying Deng Ying Li Dongsheng Hu Jianfeng Huang Xiangfeng Lu Dongfeng Gu 2022Chinese Medical Journal2022,,6:0
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