检索结果-南通市图书馆

Mating behavior of the cabbage beetle, Colaphellus bowringi （Coleoptera： Chrysomelidae）

在线全文

学校读者我要写书评

暂无评论

Insect Science 2010年第1期17卷 61-66页

作者： Xing-Ping Liu hai-min He Xian-Ju Kuang Fang-Sen Xue Institute of Entomology Jiangxi Agricultural University Key Laboratory of Crop Physiology Ecology and Genetic Breeding Key Laboratory of Physiology Ecology and Cultivation of Double Cropping Rice Ministry of Agriculture Nanchang China

Circadian mating rhythms, mating frequency, mating duration, and the effect of mating duration on fecundity and fertility in the cabbage beetle, Colaphellus bowringi were investigated in the laboratory. Mating occurred throughout the 24-h cycle but the majority of copulations occurred in the photophase with two apparent peaks, one at 8：00 and another at 16：00. Mating frequency observations for 10 consecutive days indicated that pre-mating period of C. bowringi was about 4 days, and pairs mated an average of 5 times per day and an average of 40 times during the first 10 days. There was a negative correlation between mating frequency and mating duration during the consecutive mating. The mean duration of the first copulation （136.24± 4.62 min） was significantly longer than those of the second （57.87 ± 2.03 min）, third （53.05 ±2.05 min） and fourth copulation （30.86 ± 2.98 min）. Fecundity showed a slight increase with increasing mating duration but no significant difference among treatments. However, fertility was significantly influenced by the mating duration in this species. Mating of 20-min duration did not produce viable eggs. The mean percentage of fertile eggs with completed mating duration （204.43±18.96 min, 56.75% fertile eggs） was significantly higher than those with 60 min （39.55%） and 30 min （17.91%） mating duration, suggesting that the longer mating duration might be associated with transfer of more sperm that are used to increase the fertility of eggs.

关键词： circadian rhythm Colaphellus bowringi fecundity fertility mating duration mating frequency

炎症因子在艾滋病合并淋巴瘤中的作用研究现况

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

医学信息 2024年第3期37卷 180-183+188页

作者：陈星妤闵海燕陶鹏飞钱川王希汪习成大理大学公共卫生学院云南省传染病医院感染科

艾滋病相关淋巴瘤（ARL）是当今HIV/AIDS患者最常见的恶性肿瘤之一。IL-6是一种多效免疫调节活性的细胞因子，IL-6与肿瘤的发生发展、侵袭、转移及预后有密切关系。CRP是一个敏感的炎症指标，在感染发生早期就可升高，其在肝细胞中合成... 详细信息

艾滋病相关淋巴瘤（ARL）是当今HIV/AIDS患者最常见的恶性肿瘤之一。IL-6是一种多效免疫调节活性的细胞因子，IL-6与肿瘤的发生发展、侵袭、转移及预后有密切关系。CRP是一个敏感的炎症指标，在感染发生早期就可升高，其在肝细胞中合成，主要是由于机体发生感染后通过IL-6、TNF-α等细胞因子诱导而合成。PCT可以作为一种全身炎症反应的生物标志物，临床上常用于鉴别细菌性感染和其他炎症感染。D-二聚体（D-D）是纤维蛋白形成和降解的敏感指标，手术、恶性肿瘤及肾功能不全等因素都可导致D-D升高。本文对IL-6、CRP、PCT和D-D对肿瘤特别是淋巴瘤作用的研究现况做一综述，以期为探讨上述炎症因子在艾滋病合并淋巴瘤中的作用提供参考。

关键词：艾滋病淋巴瘤白介素6 C反应蛋白降钙素原 D二聚体

Prevotella and succinate treatments altered gut microbiota,increased laying performance,and suppressed hepatic lipid accumulation in laying hens

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2024年第2期15卷 844-861页

作者： min Liu Zeyue Kang Xikang Cao Hongchao Jiao Xiaojuan Wang Jingpeng Zhao hai Lin College of Animal Science and Technology Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionKey Laboratory of Efficient Utilization of Non‑Grain Feed Resources(Co‑Construction by Ministry and Province)Ministry of Agriculture and Rural AffairsShandong Agricultural UniversityTai’an 271018China

Background This work aimed to investigate the potential benefits of administering Prevotella and its primary metabolite succinate on performance,hepatic lipid accumulation and gut microbiota in laying *** One hundred and fifty 58-week-old Hyline Brown laying hens,with laying rate below 80%and plasma triglyceride(TG)exceeding 5 mmol/L,were used in this *** hens were randomly allocated into 5 groups and subjected to one of the following treatments:fed with a basal diet(negative control,NC),oral gavage of 3 mL/hen saline every other day(positive control,PC),gavage of 3 mL/hen Prevotella melaninogenica(10^(7)CFU/mL,PM)or 3 mL/hen Prevotella copri(10^(7)CFU/mL,***)every other day,and basal diet supplemented with 0.25%sodium succinate(Succinate).The results showed that PM and *** treatments significantly improved laying rate compared to the PC(P0.05).PM treatment increased(P<0.05)the mRNA levels of genes PGC-1βand APB-5B at week 4,and ACC and CPT-1 at week *** results indicated enhanced antioxidant activities at week 8,as evidenced by reduced hepatic malondialdehyde(MDA)level and improved antioxidant enzymes activities in PM and Succinate groups(P<0.05).Supplementing with Prevotella or succinate can alter the cecal ***,the abundance of Prevotella in the Succinate group was significantly higher than that in the other 4 groups at the family and genus levels(P<0.05).Conclusions Oral intake of Prevotella and dietary supplementation of succinate can ameliorate lipid metabolism of laying *** beneficial effect of Prevotella is consistent across different *** finding highlights that succinate,the primary metaboli

关键词： Fatty liver Gut microbiota Laying hen Prevotella Succinate

在线全文

学校读者我要写书评

暂无评论

气动减压阀流量-压力特性测试试验分析

液压气动与密封 2024年第9期44卷 1-5页

作者：许林斌刘丽娇任志胜闵海涛应男国家气动产品质量检验检测中心浙江宁波315500

通过分析现行国家标准GB/T 20081.1—2021、GB/T 20081.2—2021,搭建一套能够用于气动减压阀流量-压力特性测试的电-气控制一体化试验台,以常规的直动式和先导式气动减压阀为试验客体进行关于流量-压力特性(按照国标GB/T 20081.1—2021... 详细信息

通过分析现行国家标准GB/T 20081.1—2021、GB/T 20081.2—2021,搭建一套能够用于气动减压阀流量-压力特性测试的电-气控制一体化试验台,以常规的直动式和先导式气动减压阀为试验客体进行关于流量-压力特性(按照国标GB/T 20081.1—2021,下同)和压力调节特性的测试,对测试数据编辑处理后进行分析,进而验证现行标准里阐述方法的可行性,为新国标中气动减压阀流量-压力特性测试的试验提供参考。

关键词：气动减压阀流量-压力特性声速流导压力调节特性

Study on the optimal incident proton energy of ^(7)Li(p,n)^(7)Be neutron source for boron neutron capture therapy

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第3期35卷 170-180页

作者： Yi-Nan Zhu Zuo-Kang Lin hai-Yan Yu Ye Dai Zhi-min Dai Xiao-Han Yu Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Science Beijing 100049China

Boron neutron capture therapy(BNCT)is recognized as a precise binary targeted radiotherapy technique that effectively eliminates tumors through the^(10)B(n,α)^(7)Li nuclear *** various neutron sources,accelerator-based sources have emerged as particularly promising for BNCT ***^(7)Li(p,n)^(7)Be reaction is highly regarded as a potential neutron source for BNCT,owing to its low threshold energy for the reaction,significant neutron yield,appropriate average neutron energy,and additional *** study utilized Monte Carlo simulations to model the physical interactions within a lithium target subjected to proton bombardment,including neutron moderation by an MgF_(2)moderator and subsequent BNCT dose analysis using a Snyder head *** study focused on calculating the yields of epithermal neutrons for various incident proton energies,finding an optimal energy at 2.7 ***,the Snyder head phantom was employed in dose simulations to validate the effectiveness of this specific incident energy when utilizing a^(7)Li(p,n)^(7)Be neutron source for BNCT purposes.

关键词： Boron neutron capture therapy ^(7)Li(p,n)7Be neutron source Incident proton energy Monte Carlo simulation

穿心莲活性成分提取工艺及其在动物养殖中的应用研究

在线全文

学校读者我要写书评

暂无评论

饲料研究 2024年第5期47卷 155-160页

作者：徐兰程包雨明韦信求牙英红谭海敏周芳芳卢成淑辛桂瑜玉林师范学院生物与制药学院广西玉林537000 广西高校亚热带生物资源保护与利用重点实验室广西玉林537000

穿心莲是一种常见中草药,常用于治疗感冒发热、喉咙肿痛、口舌生疮等。穿心莲具有多种化学成分,包括酯类、黄酮类和生物碱等,具有抗肿瘤、抗炎、抗菌、抗病毒等多种生物活性。穿心莲作为饲料添加剂能够提高动物免疫力,促进生长发育,改... 详细信息

穿心莲是一种常见中草药,常用于治疗感冒发热、喉咙肿痛、口舌生疮等。穿心莲具有多种化学成分,包括酯类、黄酮类和生物碱等,具有抗肿瘤、抗炎、抗菌、抗病毒等多种生物活性。穿心莲作为饲料添加剂能够提高动物免疫力,促进生长发育,改善畜产品品质,预防和治疗动物疾病。文章介绍了穿心莲的主要活性成分提取方法、生物活性功能及其在动物生产中的应用研究进展,以期为穿心莲在动物生产中的应用研究提供参考。

关键词：穿心莲化学成分生物活性动物养殖

Automated lfare forecasting using a statistical learning technique

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2010年第8期10卷 785-796页

作者： Yuan Yuan Frank Y. Shih Ju Jing hai-min Wang Computer Vision Laboratory Department of Computer Science New Jersey Institute of Technology Newark NJ 07102 USA Space Weather Research Laboratory Physics Department New Jersey Institute of Technology Newark NJ 07102 USA

We present a new method for automatically forecasting the occurrence of solar flares based on photospheric magnetic measurements. The method is a cascading combination of an ordinal logistic regression model and a support vector machine classifier. The predictive variables are three photospheric magnetic parameters, i.e., the total unsigned magnetic flux, length of the strong-gradient magnetic polarity inversion line, and total magnetic energy dissipation. The output is true or false for the occurrence of a certain level of flares within 24 hours. Experimental results, from a sample of 230 active regions between 1996 and 2005, show the accuracies of a 24- hour flare forecast to be 0.86, 0.72, 0.65 and 0.84 respectively for the four different levels. Comparison shows an improvement in the accuracy of X-class flare forecasting.

关键词： Sun flares -- Sun magnetic fields

Spatial construction of ultrasmall Pt-decorated 3D spinel oxidemodified N-doped graphene nanoarchitectures as high-efficiency methanol oxidation electrocatalysts

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第1期43卷 186-197页

作者： Qi Zhang min-min Yan Wen-Fa Du Chen-Yu Yin Jian Zhang Lu Yang Yun-Qing Kang hai-Yan He Hua-Jie Huang College of Mechanics and Materials Hohai UniversityNanjing 210098China New Energy Technology Engineering Lab of Jiangsu Province College of ScienceNanjing University of Posts&Telecommunications(NUPT)Nanjing 210023China International Center for Materials Nanoarchitectonics(WPIMANA) National Institute for Materials ScienceTsukuba 305-0044IbarakiJapan

Direct methanol fuel cell technology recently becomes the focus of both academic and engineering circles,which stimulates the exploitation and utilization of advanced electrode catalysts with high activity and long ***,we demonstrate a robust bottom-up approach to the spatial construction of three-dimensional(3D) spinel manganese-cobalt oxide-modified N-doped graphene nanoarchitectures decorated with ultrasmall Pt nanoparticles(Pt/MnCo_(2)O_(4)-NG) via a controllable selfassembly *** incorporation of MnCo_(2)O_(4)nanocrystals provides abundant hydroxyl sources to promote the oxidative removal of CO-like byproducts on Pt sites,while the existence of 3D porous N-doped graphene networks facilitates the transportation of both ions and electrons in the hybrid system,thus giving rise to remarkable synergetic coupling effects during the methanol oxidation ***,the optimized Pt/MnCo_(2)O_(4)-NG nano architecture expres ses exceptional electrocatalytic properties with a large electrochemically active surface area of 99.5 m^(2)·g^(-1),a high mass activity of1508.3 mA·mg^(-1),strong toxicity resistance and reliable long-term durability,which have obvious competitive advantages over those of conventional Pt/carbon black,Pt/carbon nano tube,Pt/graphene,and Pt/N-doped graphene catalysts with the same Pt usage.

关键词： Platinum MnCo_(2)O_(4) 3D graphene Electrocatalysts Methanol oxidation

聚酯纤维与某些其他纤维混纺定量分析方法(碱性乙醇法)的研究

在线全文

学校读者我要写书评

暂无评论

中国口岸科学技术 2024年第1期6卷 27-33页

作者：黄海敏谢飞黄宇斌颜刚华李光毅陈召容广州海关技术中心广州510623

本研究使用碱性乙醇为溶解试剂对聚酯纤维与某些其他纤维混纺产品进行定量分析,在70℃水浴中振荡溶解15 min,将聚酯纤维从已知干燥质量的混合物中溶解去除,将残留物清洗、烘干和称重,从而计算出各组分纤维的质量百分含量。GB/T 2910.24... 详细信息

本研究使用碱性乙醇为溶解试剂对聚酯纤维与某些其他纤维混纺产品进行定量分析,在70℃水浴中振荡溶解15 min,将聚酯纤维从已知干燥质量的混合物中溶解去除,将残留物清洗、烘干和称重,从而计算出各组分纤维的质量百分含量。GB/T 2910.24—2009《纺织品定量化学分析第24部分:聚酯纤维与某些其他纤维的混合物(苯酚/四氯乙烷法)》中使用的试剂是苯酚/四氯乙烷,具有一定毒性,对环境和人体健康有一定影响,对实验环境和废液回收有较高要求。使用碱性乙醇法可以降低对环境的污染和身体健康的危害,且该方法操作简单、准确可靠,适用于聚酯纤维与某些其他纤维混纺的定量分析。

关键词：聚酯纤维碱性乙醇定量分析