我国社会救助管理服务体系建设研究     

王秀花  张元洁 《安徽农业大学学报》2018,27(4):93-97

我国社会救助体系不断完善的过程中涉及主体更多元、方式更多样。当前社会救助面临相关部门和组织多、信息复杂、经办分散、分类精准施救难度大等问题。基于我国社会救助模式的合理价值选择，提出管理服务体系建设的重要意义。进而分析社会救助在管理服务上面临的挑战和难题，从组织协调管理、信息网络系统、基层经办机构、社会参与机制四个方面提出构建多层次管理服务体系的思路。力求提高管理服务的效率和效能，促进互助共济社会救助共同体的形成，提升公众满意度，夯实我国民生保障基础。  相似文献   

白屈菜CmFAD2基因的克隆及植物转化载体构建     

赵露  李俊  周新芳  苑雪琪  朱雅静  魏云洁  许永华 《分子植物育种》2020,(6):1876-1882

通过对白屈菜低温应答过程的转录组分析发现膜脂不饱和化相关基因的表达在一定过程中发生变化,脂肪酸去饱和酶基因FAD2在随温度的变化趋势为正"V"型,且表达量变化显著。利用NCBI等在线软件对序列进行相关生物学信息分析,并对白屈菜FAD家族成员FAD2基因的完整开放阅读框(ORF)进行克隆,并命名为CmFAD2。选用克隆载体pMD-19-T,转化大肠杆菌DH5α,测序验证序列正确性及完整性。将目的基因与植物表达载体pRI-201-AN连接构建重组DNA pRI-201-AN-Cm FAD2,电击法转化农杆菌LBA4404,利用菌液PCR法验证成功。该基因可作为药用植物抗寒品种创制的候选基因。  相似文献   

Vitrification of mouse two-cell and blastocyst stage embryos in simplified closed system using either a hemi-straw or a hollow fiber device     

Tayita Suttirojpattana  Theesit Juanpanich  Rangsun Parnpai  Teraporn Vutyavanich 《Animal Science Journal》2021,92(1):e13585

Two-cell stage and blastocyst stage mouse embryos were equilibrated in a medium containing 7.5% ethylene glycol (EG) and 7.5% dimethyl sulfoxide (DMSO) for 8–15 min. Vitrification was performed in a medium containing 0.5 M sucrose and either 15% EG + 15% DMSO, 17.5% EG + 17.5% DMSO, or 20% EG + 20% DMSO for 30 s. They were then placed either on a hemi-straw (HS) or a hollow fiber vitrification (HFV) device and vitrified by cooled air inside a 0.5-ml straw. In two-cell embryos, a 100% survival rate was obtained from all groups except the 20% HS group (P > .05). All vitrified two-cell groups showed similar rates of blastocyst development to that of fresh control group (P > .05), except 17.5% and 20% HFV groups, which were significantly lower than the other groups (P < .05). In the blastocyst embryos, the HFV groups were divided into two subgroups (non-collapsed; HFV-NC and collapsed; HFV-C blastocyst). Re-expansion rate in 15% HFV-NC, 17.5% HFV-NC, and 15% HFV-C groups was reduced (P < .05), whereas the rest were similar to control. In conclusion, we established a simplified, reliable, and closed system for HFV vitrification applying hemi-straw, which does not require skilled practitioners.  相似文献   

Engineered-airlift pumps for aquaculture applications using multiphase flow analysis     

《Aquacultural Engineering》2019

Currently, very few aquaculture operations are employing airlift pump technology for water recirculation, aeration, and waste removal. This is likely due to the poor design and lower efficiency of traditional airlift design, the limited amount of research effort that has been invested in improving performance capabilities of air lift pumps and the general lack of awareness of the industry about the inherent advantages of airlift systems. A new efficient airlift pump is hydrodynamically designed by incorporating the Volume of Fluid (VOF) multi-phase model along with the K-ε turbulence model utilizing Computational Fluid Dynamics (CFD) tools. The pump is designed to offer a substantial reduction in total energy usage as well as an improved quality of the culture products in order to make it attractive to aquaculture industry. In this study, both numerical and experimental investigations were carried out for airlift systems operating under two different submergence ratios of 50% and 90% in a lab setting using 2.54 cm diameter pumps. Also, the performance of a large-scale pumps of 10.16 cm diameters were also tested in an aquaculture raceway to determine its effect on the operation. The numerical results were found to be in agreement with the experiments within ±20% which is considered very reasonable for multiphase flow analysis. The present study was found to present a great tool for modelling the airlift pump performance, and potentially proposing new designs.  相似文献   

基于森林健康理念的森林康养产业发展研究     

谢中  付甫永  申修洪  王安良  严明贤 《绿色科技》2020,(3):135-137

阐述了森林健康理念和森林康养的基本概念,介绍了森林健康理念和森林康养的发展现状,分析了森林健康与森林康养产业之间的关系。结果表明:森林康养产业的理论基础就是基于森林健康理念继承发展来的,必然会促进森林健康产业的发展。运用森林健康理念指导森林康养产业发展是森林康养产业可持续发展的有效途径,森林健康理念在中国会不断完善和发展,也更有利于中国森林康养产业的发展。展望康养产业,会形成一种新的经济形态,成为国民福祉。  相似文献   

不拘于形，不役于物——欧阳修的园林活动与园林书写     

韦雨涓 《广东园林》2020,42(5):92-96

欧阳修自幼与园林结缘，仕宦四十年，所到之处植花造园，笔耕不辍，留下数座园林景观、二十多篇园亭记及百余首园林诗词，撰写了现存最早的牡丹专著《洛阳牡丹记》，为后人研究园林提供了珍贵的史料。欧阳修的园林活 动和园林书写与其宦海沉浮、文学创作紧密相关。欧阳修热爱但不耽溺于园林，其崇尚自然、开放自适，不拘于形，不役于物的园林观，拓宽了园林审美的视域，启发了后人对“物”的审美思考，为园林理论注入了新鲜血液。欧阳修进一步打开了园林的大门，推动了园林的开放，为园林的繁荣与普及做出贡献。  相似文献   

畜牧养殖污染现状及综合治理对策     

杨军威 《畜牧兽医科学(电子版)》2021,(4):188-189

畜牧养殖业污染问题是畜牧养殖生产过程中的常见问题,对于养殖业也有一定的影响,直接影响畜牧产品质量及动物疫病防治工作。该文针对畜牧养殖业污染现状进行分析研究,阐述畜牧养殖污染问题现状,并综合新疆地区的畜牧养殖业发展状态,提出畜牧养殖污染问题综合治理的有效对策。  相似文献   

右江流域水生态补偿机制研究初探     

孔猛 《中国农村水利水电》2020,(1):43-47

为保护右江流域生态环境,协调郁江乃至珠江上下游各方经济利益,更好的激励上游地区生态环境保护行为,通过分析右江流域水生态现状、存在问题、现有生态补偿政策环境及其在郁江流域、珠江流域中的地位和作用,利用外部性理论,分析提出了右江流域水生态补偿模式。通过对标对表有关生态保护规划和区划成果,立足百色市实际,提出了右江流域水生态补偿内容、补偿主客体、补偿标准和补偿方式,初步构建右江流域水生态补偿机制框架,并提出有针对性的补偿政策建议,为水生态补偿实施提供了参考。  相似文献   

Upper body movement analysis of multiple limb asymmetry in 367 clinically lame horses     

Suphannika Phutthachalee  Kathrin Mählmann  Suvaluk Seesupa  Christoph Lischer 《Equine veterinary journal》2021,53(4):701-709

  相似文献   

十里香茶离体培养及再生体系研究     

杨霏  邹瑞  张玥  杨自云  吴田 《种子》2020,(4):46-49,54

为了保护珍贵的十里香茶树资源,掌握利于十里香茶的最优组培条件,本研究对十里香茶组培过程中外植体类型、消毒时间、培养基添加物及培养条件进行了筛选。结果表明,采用轻微木质化的带腋芽茎段经升汞消毒15 min,接种后暗培养5 d,MS+0.2 mg·L^-1 NAA培养基中添加3 mg·L^-1 PVP+2000 mg·L^-1 Vc或者6 mg·L^-1 PVP+3000 mg·L^-1 AC,可在低污染率的前提下将褐化率降为10%左右,一定程度上解决了茶树组培中褐化率高的难题;采用1/8 MS+1 mg·L^-1 IBA培养基有利于外植体生根且增殖迅速。本研究建立了十里香茶的无菌苗离体培养及再生体系,可通过组培手段对其进行大量繁殖。  相似文献