检索结果-南通市图书馆

Journal of Integrative Agriculture 2013年第2期12卷 319-326页

作者： LIU Da-cheng ZHOU Xiang-li Zhao Pei-ting GAO Min han hao-qi HU Hong-lian College of Veterinary Medicine Inner Mongolia Agricultural University Key Laboratory of Clinical Diagnosis and Treatment Techniques for Animal Disease of Ministry of Agriculture Animal Nutrition Institute of Agriculture and Animal Husbandry Academy of Inner Mongolia

Six rumen-cannulated lactating Guanzhong goats were used to investigate changes in ruminal fermentation pattern and the microbiota following a subacute rtmainal acidosis （SARA） inducing procedure. Induction of SARA was performed by increasing dietary non-fiber carbohydrate （NFC） to neutral detergent fiber （NDF） ratio from 1.02 （stage 1） to 1.24 （stage 2）, 1.63 （stage 3） and 2.58 （stage 4）. A dynamic pH monitoring system, real-time fluorescent quantitative PCR and conventional anaerobic culture were used to assess changes in ruminal pH and microbiota. Results indicated that rumen fermentation patterns changed significantly with increased NFC：NDF ratio. The decline in ruminal pH was caused by increased ruminal total volatile fatty acids （TVFA）, which was mainly attributed to a significant increase in ruminal butyrate, rather than the accumulation of ruminal lactic acid. In addition, in the course of SARA, the number of rumen microoganisms altered significantly, with increases in ruminal amylolytic bacteria, Lactobacilli, Streptococcus bovis and Megasphaera elsdenii, the latter particularly dramatically indicating that it may be the main factor responsible for the increase in butyrate, and decrease in protozoa.

关键词： rumen fermentation rumen microorganisms subacute ruminal acidosis goat

Production of charmonium pentaquarks from b-baryon and B-meson decays:SU(3)analysis

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第5期48卷 107-116页

作者：韩伟毫邢晔徐吉 School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China School of Physics China University of Mining and TechnologyXuzhou 221000China

Here,we study the production of charmonium pentaquarks cc¯qqq from bottom baryon and B-meson decays under the flavor SU(3)*** amplitudes for various processes are parameterized in terms of SU(3)irreducible nonperturbative *** relations between decay widths are ***,the strong decays of pentaquarks are *** results can be tested in future measurements at LHCb,Belle II,and *** decay branching fractions are measured,this study will be useful for the exploration of new decay channels and pentaquark states.

关键词： pentaquark SU(3)symmetry decay

An effective method to predict oil recovery in high water cut stage

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2015年第6期27卷 988-995页

作者：刘志斌刘浩翰 School of Science Southwest Petroleum University Department of Information Engineering Sichuan College of Architectural Technology

The water flooding characteristic curve method based on the traditional regression equation between the oil and water phase permeability ratio and the water saturation is inappropriate to predict the oil recovery in the high water cut stage. Hence, a new water flooding characteristic curve equation adapted to the high water cut stage is proposed to predict the oil recovery. The water drive phase permeability experiments show that the curve of the oil and water phase permeability ratio vs. the water saturation, in the semi-logarithmic coordinates, has a significantly lower bend after entering the high water cut stage, so the water flooding characteristic curve method based on the traditional regression equation between the oil and water phase permeability ratio and the water saturation is inappropriate to predict the oil recovery in the high water cut stage; therefore, a new water flooding characteristic curve equation based on a better relationship between ln（kro/k,.~） and S~ is urgently desirable to be established to effectively and reliably predict the oil recovery of a water drive reservoir adapted to a high water cut stage. In this paper, by carrying out the water drive phase permeability experiments, a new mathematical model between the oil and water phase permeability ratio and the water saturation is established, with the regression analysis method and an integration of the established model, the water flooding characteristic curve equation adapted to a high water cut stage is obtained. Using the new water flooding characteristic curve to predict the oil recovery of the GD3-block of the SL oilfield and the J09-block of the DG oil field in China, results with high predicted accuracy are obtained.

关键词： high water cut stage phase permeability equation water flooding characteristic curve predicting oil recovery

Abating transport GHG emissions by hydrogen fuel cell vehicles： Chances for the developing world

在线全文

学校读者我要写书评

暂无评论

Frontiers in Energy 2018年第3期12卷 466-480页

作者： han hao Zhexuan MU Zongwei LIU Fuquan Zhao State Key Laboratory of Automotive Safety and Energy ChinaAutomotive Energy Research Center Tsinghua University Beijing100084 China State Key Laboratory of Automotive Safety and Energy TsinghuaUniversity Beijing 100084 China

Fuel cell vehicles, as the most promising clean vehicle technology for the future, represent the major chances for the developing world to avoid high-carbon lock-in in the transportation sector. In this paper, by taking China as an example, the unique advantages for China to deploy fuel cell vehicles are reviewed. Subsequently, this paper analyzes the greenhouse gas （GHG） emissions from 19 fuel cell vehicle utilization pathways by using the life cycle assessment approach. The results show that with the current grid mix in China, hydrogen from water electro- lysis has the highest GHG emissions, at 3.10 kgCO2/km, while by-product hydrogen from the chlor-alkali industry has the lowest level, at 0.08 kgCO2/krn. Regarding hydrogen storage and transportation, a combination of gas-hydrogen road transportation and single compression in the refueling station has the lowest GHG emissions. Regarding vehicle operation, GHG emissions from indirect methanol fuel cell are proved to be lower than those from direct hydrogen fuel cells. It is recommended that although fuel cell vehicles are promising for the developing world in reducing GHG emissions, the vehicle technology and hydrogen production issues should be well addressed to ensure the life-cycle low-carbon performance.

关键词： hydrogen fuel cell vehicle life cycle assessment energy consumption greenhouse gas (GHG) emissions China

ATP6AP2,a regulator of LRP6/β-catenin protein trafficking,promotes Wnt/β-catenin signaling and bone formation in a cell type dependent manner

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Bone Research 2024年第2期12卷 453-468页

作者： Lei Xiong hao-han Guo Jin-Xiu Pan Xiao Ren Daehoon Lee Li Chen Lin Mei Wen-Cheng Xiong Department of Neurosciences School of MedicineCase Western Reserve UniversityClevelandOH 44106USA Louis Stoke VA Medical Center ClevelandOH 44106USA

Wnt/β-catenin signaling is critical for various cellular processes in multiple cell types,including osteoblast(OB)differentiation and *** how Wnt/β-catenin signaling is regulated in OBs remain ***6AP2,an accessory subunit of V-ATPase,plays important roles in multiple cell types/organs and multiple signaling ***,little is known whether and how ATP6AP2 in OBs regulates Wnt/β-catenin signaling and bone *** we provide evidence for ATP6AP2 in the OB-lineage cells to promote OB-mediated bone formation and bone homeostasis selectively in the trabecular bone *** knocking out(CKO)ATP6AP2 in the OB-lineage cells(Atp6ap2^(Ocn-Cre))reduced trabecular,but not cortical,bone formation and bone *** and cellular biochemical studies revealed that LRP6 and N-cadherin were reduced in ATP6AP2-KO BMSCs and OBs,but not *** in vitro and in vivo studies revealed impairedβ-catenin signaling in ATP6AP2-KO BMSCs and OBs,but not osteocytes,under both basal and Wnt stimulated conditions,although LRP5 was decreased in ATP6AP2-KO osteocytes,but not *** cell biological studies uncovered that osteoblastic ATP6AP2 is not required for Wnt3a suppression ofβ-catenin phosphorylation,but necessary for LRP6/β-catenin and N-cadherin/β-catenin protein complex distribution at the cell membrane,thus preventing their *** of activeβ-catenin diminished the OB differentiation deficit in ATP6AP2-KO *** together,these results support the view for ATP6AP2 as a critical regulator of both LRP6 and N-cadherin protein trafficking and stability,and thus regulatingβ-catenin levels,demonstrating an un-recognized function of osteoblastic ATP6AP2 in promoting Wnt/LRP6/β-catenin signaling and trabecular bone formation.

关键词： LRP6 impaired organs

Structure Evolution and Electrochemical Performance of Al_2O_3-coated LiNi_(0.4)Co_(0.2)Mn_(0.4)O_2 During Charge-discharge Cycling

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2012年第4期28卷 686-690页

作者： LIU hao-han ZhanG Jian LOU Yu-wan YANG Chuan-zheng XIE Xiao-hua XIA Bao-jia Shanghai Institute of Microsystem and Information Technology Chinese Academy of SciencesShanghai 200050P.R.China

Several lithium-ion batteries of 18650-type were assembled with pristine or Al2O3-coated LiNi0.4Co0.2Mn0.4O2（NCM） as cathode material and mesocarbon microbeads（MCMB） as anode *** cycling performance of the batteries was examined under 25 °C at a 2C rate within a potential range of 2.75―4.20 *** changes of the crystal structure,the lattice parameter,the mean crystallite size,and the mean micro-strain of pristine NCM and Al2O3-coated NCM during the charge-discharge cycling were determined by X-ray diffraction（XRD）.The results indicate that the bulk structure of Al2O3-coated NCM is more stable than that of pristine NCM,which leads to the better cycling performance of Al2O3-coated NCM compared to that of pristine NCM.

关键词： LiNi0.4Co0.2Mn0.4O2 Al2O3-coated Cycling performance Bulk structure

Protein-encapsulated long-wavelength fluorescent probe hybrid for imaging lipid droplets in living cells and mice with non-alcoholic fatty liver

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第11期35卷 448-453页

作者： han-Min Wang Yan-Chen Li Lu-Lu Sun Ming-Ye Tang Jia Liu Jiahao Cai Lei Dong Jia Li Yi Zang Hai-hao han Xiao-Peng He Molecular Imaging Center State Key Laboratory of Chemical BiologyShanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China Shandong Laboratory of Yantai Drug Discovery Bohai Rim Advanced Research Institute for Drug DiscoveryYantai 264117China School of Pharmacy Weifang Medical UniversityWeifang 261053China Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterFrontiers Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China The International Cooperation Laboratory on Signal Transduction National Center for Liver CancerEastern Hepatobiliary Surgery HospitalShanghai 200438China Lingang laboratory Shanghai 201203China University of Chinese Academy of Sciences Beijing 100049China School of Pharmaceutical Science and Technology Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310058China School of Chinese Materia Medica Nanjing University of Chinese MedicineNanjing 210023China

Non-alcoholic fatty liver disease(NAFLD)is prevalent worldwide as a chronic liver disease that not only gives rise to hepatic complications,but leads to other chronic diseases such as type 2 diabetes and *** aberrant accumulation of lipid droplets(LDs)in hepatocytes is a prominent signature of ***,conventional techniques lack the capability to effectively monitor the dynamic changes in LD levels during NAFLD with living ***,it is imperative to develop LD-specific long-wavelength fluorescent probes with high imaging contrast for the in-situ diagnosis of *** this study,we synthesized a new LD-selective long-wavelength fluorescent probe,denoted as LD-1,based on the twisted intramolecular charge transfer(TICT)*** probe exhibits a large Stokes shift and intensive fluorescence emission in nonpolar and viscous *** self-assembling LD-1 with bovine serum albumin(BSA),a biocompatible,long-wavelength fluorescent probe hybrid,LD-1@BSA,was formed,allowing for LDs to be selectively imaged in ***,LD-1@BSA successfully discriminates NAFLD cells before and after drug treatment,and achieves non-invasive and real-time monitoring of LD accumulation in a mouse model of NAFLD.

关键词： Lipid droplets imaging Fluorescent probe Large Stokes shift Protein encapsulation Non-alcoholic fatty liver

The transcription factor NAC102 confers cadmium tolerance by regulating WAKL11 expression and cell wall pectin metabolism in Arabidopsis

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2023年第10期65卷 2262-2278页

作者： Guang hao han Ru Nan Huang Li Hong Hong Jia Xi Xu Yi Guo Hong Yu Huan Wu Wei Wei Chen Research Center for Plant RNA Signaling College of Life and Environmental SciencesHangzhou Normal UniversityHangzhou 310036China Warwick‐hangzhou RNA Signaling Joint Laboratory School of Life SciencesUniversity of WarwickWarwick CV47ALUnited Kingdom State Key Laboratory of Plant Physiology and Biochemistry College of Life SciencesZhejiang UniversityHangzhou 310058China

Cadmium(Cd) toxicity severely limits plant growth and development. Moreover, Cd accumulation in vegetables, fruits, and food crops poses health risks to animals and humans. Although the root cell wall has been implicated in Cd stress in plants, whether Cd binding by cell wall polysaccharides contributes to tolerance remains controversial, and the mechanism underlying transcriptional regulation of cell wall polysaccharide biosynthesis in response to Cd stress is unknown. Here, we functionally characterized an Arabidopsis thaliana NAC-type transcription factor, NAC102, revealing its role in Cd stress responses. Cd stress rapidly induced accumulation of NAC102.1, the major transcript encoding functional NAC102, especially in the root apex. Compared to wild type(WT) plants, a nac102 mutant exhibited enhanced Cd sensitivity, whereas NAC102.1-overexpressing plants displayed the opposite phenotype. Furthermore, NAC102 localizes to the nucleus, binds directly to the promoter of WALL-ASSOCIATED KINASE-LIKE PROTEIN11(WAKL11), and induces transcription, thereby facilitating pectin degradation and decreasing Cd binding by pectin. Moreover, WAKL11 overexpression restored Cd tolerance in nac102mutants to the WT levels, which was correlated with a lower pectin content and lower levels of pectin-bound Cd. Taken together, our work shows that the NAC102-WAKL11 module regulates cell wall pectin metabolism and Cd binding, thus conferring Cd tolerance in Arabidopsis.

关键词： cadmium stress cell wall NAC102 transcriptional regulation WAKL

Design of a low-frequency miniaturized piezoelectric antenna based on acoustically actuated principle

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2022年第7期31卷 565-572页

作者： Yong Zhang Zhong-Ming Yan Tian-hao han Shuang-Shuang Zhu Yu Wang Hong-Cheng Zhou School of Electrical Engineering Southwest Jiaotong UniversityChengdu 610000China Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle Ministry of EducationChengdu 610000China

An acoustically actuated piezoelectric antenna is proposed for low frequency(LF)band in this *** proposed antenna is theoretically calculated,numerically optimized by the finite element method(FEM),and experimentally *** measurement results show that the near-field radiation pattern of the piezoelectric antenna is similar to that of the electric dipole *** radiation efficiency of the piezoelectric antenna is 3-4 orders of magnitude higher than that of electrically small antenna(ESA),with their sizes being the same size,and the maximum transmission distance obtained experimentally is 100 cm,which can be improved by increasing the input *** addition,the gain,directivity,and quality factor of piezoelectric antenna are also *** this paper,traditional antenna parameters are creatively used to analyze the performance of piezoelectric *** research conclusions can provide reliable theoretical basis for realizing LF antenna miniaturization.

关键词： piezoelectric low frequency antenna resonance frequency radiation quality factor antenna miniaturization

Role of external counterpulsation in the treatment of ischemic stroke

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2010年第2期7卷 88-92页

作者： Jing-hao han Wai-Hong Leung Ka-Sing Wong Departments of Medicine ＆ Therapeutics The Chinese University of Hong Kong Shatin Hong Kong SAR

Reduced blood flow is the principle pathophysiologic event in acute ischernic ***,flow augmentation is the most important goal in stroke *** of cerebral blood flow can be accomplished by proximal arterial recanalization or by other systemic *** counterpulsation is a non-invasive method to improve the perfusion of heart,kidneys and *** review summarizes the history,possible mechanism and the role of external counterpulsation in ischemic stroke.

关键词： ischemic stroke external counterpulsation cerebral blood flow cerebral perfusion