检索结果-南通市图书馆

Crustal Electrical Structure and Deep Metallogenic Potential in Northern Wuyi Area(South China),based on Magnetotelluric Data

维普期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2022年第3期96卷 791-805页

作者： luo Fan Lü Qingtian ZHANG Kun yan Jiayong Colin GFARQUHARSON ZHANG Chong FU Guangming School of Geophysics and Measurement-control Technology' East China University of TechnologyNanchang 330013China Chinese Academy of Geological Sciences Beijing 100037China China Deep Exploration Center China Geological Survey&Chinese Academy of Geological SciencesBeijing 100037China Department of Earth Sciences Memorial University of NewfoundlandSt.John'sNL A1B 3X5Canada

The northern Wuyi area,which is located in the northern Wuyi metallogenic belt,has superior mineralization *** Pingxiang-Guangfeng-jiangshan-Shaoxing fault(PSF)extends across the whole region regardless of whether or how the PSF relates to the near-surface *** carried out an MT survey in the region and obtained a reliable 2D model of the crustal electrical structure to a depth of 30 *** the resistivity model,we inferred that a continuous high conductivity belt that ranges from the shallow to deep crust is a part of the ***,we estimated the fluid content and pressure gradient to identify the deep sources of fluid as well as its pattern of motion ***,we proposed a model for the deep metallogenic migration processes that combines geological data,fluid content data,pressure gradient data,and the subsurface resistivity *** model analysis showed that the jiangnan orogenic belt and the Cathaysia block formed the PSF during the process of *** deep fluid migrated upward through the PSF to the shallow ***,we believe that the PSF is an ore-forming fluid migration channel and that it laid the material basis for large-scale mineralization in the shallow crust.

关键词： magnetotellurics crustal electrical structure PSF deep metallogenic background model northern Wuyi area

Tannic acid extracted from gallnut prevents post-weaning diarrhea and improves intestinal health of weaned piglets

在线全文

学校读者我要写书评

暂无评论

Animal Nutrition 2021年第4期7卷 1078-1086页

作者： yanyan Song Yong luo Bing Yu Jun He Ping Zheng Xiangbing Mao Zhiqing Huang Junqiu luo Yuheng luo Hui yan Quyuan Wang Huifen Wang Daiwen Chen Jie Yu Animal Nutrition Institute Sichuan Agricultural UniversityKey Laboratory of Animal Disease-Resistance NutritionSichuan ProvinceChengdu611130China Departments of Traditional Chinese Medicine Sichuan Academy of Medical SciencesSichuan Provincial People's HospitalChengdu610031China

This experiment was conducted to evaluate the effects of different levels of tannic acid(TA)on growth performance,diarrhea rate,nutrient digestibility and intestinal health in weaned piglets.A total of 180 weaned piglets(Duroc×Landrace×Yorkshire,24 d of age,initial average BW=7.77±0.17 kg)were allotted to 5 groups(6 pigs/pen and 6 replicates/group)in a randomized complete block design according to their gender and body *** were fed a basal diet,or the basal diet supplemented with 0.05%,0.1%,0.2%or 0.4%TA for 28 *** supplementary levels of TA in the diets were obtained by adding tannalbin containing 51%TA and 40.17%*** results showed that,compared with the CON group,dietary TA did not affect ADFI,ADG or F:G,and linearly reduced(P<0.01)the diarrhea rate and diarrhea index of *** were no significant effects on apparent total tract digestibility(ATTD)in the 0.05%,0.1%and 0.2%TA groups,while negative effects(P<0.05)on apparent digestibility of crude protein and gross energy were observed in the 0.4%TA *** addition,the nutrient digestibility of dry matter,crude protein and gross energy linearly decreased(P<0.01)with the increase of TA *** of TA increased(P<0.05)the villus height of the duodenum and jejunum,as well as increased(P<0.05)catalase(CAT)activity in *** TA improved(P<0.05)the Bacillus counts in cecal ***,TA significantly improved(P<0.05)Bacillus counts and reduced(P<0.05)the Escherichia coli counts in colonic *** concentration of acetic acid,pro pionic acid,butyric acid and isovaleric acid in cecal digesta were significantly increased(P<0.05).The mRNA expression level of zonula occludens-1(Z0-1),zonula occludens-2(ZI-2),and claudin-2(CLDN-2)in the jejunum were greater(P<0.05)in TA supplemented *** study showed that,compared to the control,TA prevented post-weaning diarrhea and improved intestinal health of weaned piglets,and the appropriate level of TA supplementation woul

关键词： Tannic acid Weaned piglet Post-weaning diarrhea Intestinal health

A looped heat-driven thermoacoustic refrigeration system with direct-coupling configuration for room temperature cooling

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2019年第1期64卷 8-10页

作者： Huizhi Wang Limin Zhang Guoyao Yu Jianying Hu Ercang luo Ying Ma Chao jiang Xianxian Liu Key Laboratory of Cryogenics Technical Institute of Physics and Chemistry Chinese Academy of Sciences School of Engineering Science University of Chinese Academy of Sciences School of Future Technology University of Chinese Academy of Sciences

Heat-driven thermoacoustic refrigeration has drawn extensive concern in the past decades due to its advantages of high reliability and external heat-driven *** such a system,heat can be firstly converted into acoustic power and then the acoustical power drives a refrigerator to generate cooling effect without any moving mechanical *** far,most of researches on heat-driven thermoacoustic refrigeration have focused on cryo- genic application,such as natural gas liquefaction [1,2].In addition, heat-driven thermoacoustic refrigeration also plays important roles in recovering waste heat and provides an environment- friendly alternative to the current abso'rption chiller especially in the small-scale power range [3-7].However,two main obstacles to use the thermoacoustic technology in practice are its relatively low cooling capacity and low cooling *** the two-loop configuration proposed by luo et al.[5]or the configuration of a one-unit refrigerator driven by a three-unit engine brought forward by Kees [6],they both suffer from phase-shifting tube and mismatch between the thermoacoustic engine (TAE)and thermoacoustic refrigerator (TAR).

关键词： Direct coupling Refrigeration system Thermoacoustic refrigeration driven by heat

miR-25 modulates triacylglycerol and lipid accumulation in goat mammary epithelial cells by repressing PGC-1beta

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2018年第4期9卷 868-877页

作者： Liuan Ma Huiling Qiu Zhi Chen Li Li yan Zeng Jun luo Deming Gou Shenzhen Key Laboratory of Microbial Genetic Engineering College of Life Sciences and OceanographyShenzhen UniversityShenzhen 518060GuangdongChina Biomedical Engineering Health and Environmental EngineeringShenzhen Technology UniversityShenzhen 518000GuangdongChina Shaanxi Key Laboratory of Molecular Biology for Agriculture College of Animal Science and TechnologyNorthwest A&F UniversityYangling 712100ShaanxiChina

Background: The goat(Caprahircus) is one of the most important livestock animals. Goat milk fat is an important component in the nutritional quality of goat milk. Growing evidence points to the critical roles of microRNAs(miRNAs) in lipid ***: Using a highly sensitive method of S-poly(T) plus for miRNAs detection, we analyze the expression patterns of 715 miRNAs in goat mammary gland tissues at different stages of lactation. We observed that miR-25 expression had an inverse relationship with milk production. Overexpression of miR-25 significantly repressed triacylglycerol synthesis and lipid droplet accumulation. To explore the regulatory mechanism of miR-25 in milk lipid metabolism,we analyzed its putative target genes with bioinformatics analysis followed by 3′-UTR assays. Peroxisome proliferative activated receptor gamma coactivator 1 beta(PGC-1 beta), a key regulator of lipogenics was identified as a direct target of miR-25 with three specific sites within its 3′-UTR. In addition, miR-25 mimics in goat mammary epithelial cells reduced the expressions of genes involved in lipid ***: Taken together, our results show miR-25 is potentially involved in lipid metabolism and we reveal the function of the miR-25/PGC-1 beta regulatory axis during lactation.

关键词： Goat mammary epithelial cells Lipid miR-25 PGC-1beta Triacylglycerol

在线全文

学校读者我要写书评

暂无评论

耐高温茂金属催化剂催化乙烯与降冰片烯共聚

合成树脂及塑料 2024年第3期41卷 7-10,20页

作者：张永辉葛腾杰牟祥升窦洪鑫闫冰曹晨刚姜涛天津科技大学化工与材料学院天津300457 中国石油天然气股份有限公司石油化工研究院大庆化工研究中心黑龙江大庆163714

合成了一种用于乙烯与降冰片烯高温溶液共聚合的高活性耐高温茂金属催化剂,研究了反应温度、茂金属催化剂浓度、n(Al)∶n(Zr)、降冰片烯浓度等对催化剂活性的影响,并对乙烯-降冰片烯共聚物进行了分析和表征,确定了制备乙烯-降冰片烯共... 详细信息

合成了一种用于乙烯与降冰片烯高温溶液共聚合的高活性耐高温茂金属催化剂,研究了反应温度、茂金属催化剂浓度、n(Al)∶n(Zr)、降冰片烯浓度等对催化剂活性的影响,并对乙烯-降冰片烯共聚物进行了分析和表征,确定了制备乙烯-降冰片烯共聚物的高温溶液聚合工艺条件。结果表明:反应温度为140℃时,催化剂活性高达6.7×10^(6)g/(mol·h),催化剂寿命达到30 min以上。最佳聚合条件:反应温度为140℃,茂金属催化剂浓度为6×10^(-5)mol/L,乙烯压力为1 MPa,n(Al)∶n(Zr)为250,n(B)∶n(Zr)为1.1,反应时间为30 min;最佳聚合条件下共聚物中的降冰片烯插入率达34.44%(y),密度约为0.98 g/cm^(3),玻璃化转变温度为135.8℃。

关键词：茂金属催化剂乙烯-降冰片烯共聚物溶液聚合相对分子质量分布熔体流动速率

维普期刊数据库博看期刊

Photometric solution and period analysis of the contact binary system AH Cnc

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2016年第10期16卷 63-70页

作者： Ying-jiang Peng Zhi-Quan luo Xiao-Bin Zhang Li-Cai Deng Kun Wang Jian-Feng Tian Zheng-Zhou yan yang Pan Wei-Jing Fang Zhong-Wen Feng De-Lin Tang Qi-Li Liu Jin-jiang Sun Qiang Zhou Physics and Space Science College China West Normal University Nanchong 637002 China National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210008 China School of Physical Electronics University of Electronic Science and Technology of China Chengdu 610054 China

Photometric observations of AH Cnc, a W UMa-type system in the open cluster M67, were car- fled out by using the 50BIN telescope. About 100h of time-series/3- and V-band data were taken, based on which eight new times of light minima were determined. By applying the Wilson-Devinney method, the light curves were modeled and a revised photometric solution of the binary system was derived. We con- firmed that AH Cnc is a deep contact （f = 51%）, low mass-ratio （q - 0.156） system. Adopting the distance modulus derived from study of the host cluster, we have re-calculated the physical parameters of the binary system, namely the masses and radii. The masses and radii of the two components were estimated to be respectively 1.188（4-0.061） Me, 1.332（4-0.063） RQ for the primary component and 0.185（4-0.032） Me, 0.592（4-0.051） Re for the secondary. By adding the newly derived minimum timings to all the available data, the period variations of AH Cnc were studied. This shows that the orbital period of the binary is con- tinuously increasing at a rate of dp/dt = 4.29 x 10-10 d yr-1. In addition to the long-term period increase, a cyclic variation with a period of 35.26 yr was determined, which could be attributed to an unresolved tertiary component of the system.

关键词： methods: data analysis -- astronomical instrumentation -- binaries: eclipsing stars closestars -- Galaxy: open clusters and associations: individual (M67)

基于数据挖掘分析邵荣世使用中药配方颗粒治疗慢性胃炎用药规律

在线全文

学校读者我要写书评

暂无评论

临床合理用药杂志 2024年第1期17卷 7-12页

作者：季恋苑姜晓燕倪红辉蔡艳廖湘君严玮江苏省南通市中医院 226001

目的基于数据挖掘分析邵荣世使用中药配方颗粒治疗慢性胃炎的用药规律。方法收集整理邵荣世2021年1—12月治疗慢性胃炎的中药配方颗粒处方,筛选整理后建立数据库,应用Microsoft Excel 2019进行药物频数及性味归经分析,采用IBM SPSS Mo... 详细信息

目的基于数据挖掘分析邵荣世使用中药配方颗粒治疗慢性胃炎的用药规律。方法收集整理邵荣世2021年1—12月治疗慢性胃炎的中药配方颗粒处方,筛选整理后建立数据库,应用Microsoft Excel 2019进行药物频数及性味归经分析,采用IBM SPSS Modeler 18对中药进行关联规则分析,使用SPSS 25.0软件对高频药物进行因子分析和系统聚类分析。结果纳入中药处方530张,使用配方颗粒207味,中药使用总频次9 951次。高频中药有陈皮、半夏、白术、豆蔻、甘草、厚朴等;中药功效以理气、补虚、化湿为主;药性以温为主,药味多为苦、辛、甘,归经主要在脾经、胃经;药物关联规则分析表明白术—半夏、白术—陈皮、白术—豆蔻、半夏—陈皮、半夏—豆蔻、陈皮—豆蔻关联紧密;因子分析共提取公因子8个;系统聚类分析得到新处方5首。结论邵荣世使用中药配方颗粒治疗慢性胃炎,多从辨证分型、辨病治疗、脏腑论治着手治疗,以健脾化湿、理气疏肝为基本大法,随症加用清热、活血、利水渗湿等药。

关键词：慢性胃炎数据挖掘中药配方颗粒用药规律

Network Pharmacology in Research of Chinese Medicine Formula: Methodology, Application and Prospective

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Integrative Medicine 2020年第1期26卷 72-80页

作者： luo Ting-ting LU Yuan yan Shi-kai XIAO Xue RONG Xiang-lu GUO Jiao Institute of Traditional Chinese Medicine Guangdong Pharmaceutical UniversityGuangzhou 510006China Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine Guangzhou 510006China School of Pharmacy Shanghai Jiao Tong UniversityShanghai 200240China

Chinese medicine(CM) is usually prescribed as CM formula to treat disease. The lack of effective research approach makes it difficult to elucidate the molecular mechanisms of CM formula owing to its complicated chemical compounds. Network pharmacology is increasingly applied in CM formula research in recent years, which is identified suitable for the study of CM formula. In this review, we summarized the methodology of network pharmacology, including network construction, network analysis and network verification. The aim of constructing a network is to achieve the interaction between the bioactive compounds and targets and the interaction between various targets, and then find out and validate the key nodes via network analysis and network verification. Besides, we reviewed the application in CM formula research, mainly including targets discovery, bioactive compounds screening, toxicity evaluation, mechanism research and quality control research. Finally, we proposed prospective in the future and limitations of network pharmacology, expecting to provide new strategy and thinking on study for CM formula.

关键词： network pharmacology Chinese medicine formula targets discovery mechanism research quality control research

Orbit design and mission planning for global observation of Jupiter

在线全文

学校读者我要写书评

暂无评论

Astrodynamics 2021年第1期5卷 39-48页

作者： An-Yi Huang Bing yan Zhen-Yu Li Peng Shu Ya-Zhong luo Zhen yang National University of Defense Technology Changsha 410073China State Key Laboratory of Astronautic Dynamics Xi’an 710043China

This paper presents the method created by the National University of Defense Technology(NUDT)team in the 10th China Trajectory Optimization Competition,which entails a 3-year observation mission of 180 regions on *** proposed method can be divided into three ***,a preliminary analysis and evaluation via an analytical method is undertaken to decide whether the third subtask of the mission,i.e.,exploring the Galilean moons,should be ***,a near-optimal orbit for magnetic field observation is designed by solving an analytical ***,a set of observation windows and their sequence are optimized using a customized genetic *** final index obtained is 354.505,ranking second out of all teams partaking in the competition.

关键词： Jupiter exploration resonance orbit repeating orbit design observation planning