不同收入的城镇居民对体育消费结构和体育消费需求的影响*     

于〓乐  程〓蕾 《广州体育学院学报》2019,(5):26-30

采用问卷调查和数理统计方法,研究了不同收入的居民对体育消费结构和体育消费需求的影响。结果表明,随着居民收入的增加,各类体育消费都呈现上升趋势,实物型体育消费增长速度变慢,观赏型体育消费和健身型体育消费增长速度变快,当居民年收入在10万以上时,观赏型体育消费和健身型体育消费开始急剧增加。制约体育消费需求的主要因素是居民的收入、体育消费的价格、体育消费结构和居民的可支配时间。  相似文献   

Injectable hybrid inorganic nanoscaffold as rapid stem cell assembly template for cartilage repair     

Shenqiang Wang  Letao Yang  Bolei Cai  Fuwei Liu  Yannan Hou  Hua Zheng  Fang Cheng  Hepeng Zhang  Le Wang  Xiaoyi Wang  Qianxin Lv  Liang Kong  Ki-Bum Lee  Qiuyu Zhang 《国家科学评论(英文版)》2022,9(4)

Cartilage injuries are often devastating and most cannot be cured because of the intrinsically low regenerative capacity of cartilage tissues. Although stem-cell therapy has shown enormous potential for cartilage repair, the therapeutic outcome has been restricted by low survival rates and poor chondrocyte differentiation in vivo. Here, we report an injectable hybrid inorganic (IHI) nanoscaffold that facilitates fast assembly, enhances survival and regulates chondrogenic differentiation of stem cells. IHI nanoscaffolds that strongly bind to extracellular matrix (ECM) proteins assemble stem cells through synergistic 3D cell–cell and cell–matrix interactions, creating a favorable physical microenvironment for stem-cell survival and differentiation in vitro and in vivo. Additionally, chondrogenic factors can be loaded into nanoscaffolds with a high capacity, which allows deep, homogenous drug delivery into assembled 3D stem-cell-derived tissues for effective control over the soluble microenvironment of stem cells. The developed IHI nanoscaffolds that assemble with stem cells are injectable. They also scavenge reactive oxygen species and timely biodegrade for proper integration into injured cartilage tissues. Implantation of stem-cell-assembled IHI nanoscaffolds into injured cartilage results in accelerated tissue regeneration and functional recovery. By establishing our IHI nanoscaffold-templated 3D stem-cell assembly method, we provide a promising approach to better overcoming the inhibitory microenvironment associated with cartilage injuries and to advance current stem-cell-based tissue engineering.  相似文献   

智慧环境下区域高校图书馆联盟科研数据构建、管理与服务策略研究   总被引：1，自引：0，他引：1  

唐乐  王利蕊 《情报探索》2021,(2):82-86

[目的/意义]旨在发挥科研数据的潜在开发利用价值.[方法/过程]归纳、分析了构建和影响科研数据管理与服务的关键因素.[结果/结论]提出区域高校图书馆联盟科研数据管理与服务,需建立"委员会+会员制"组织管理机制,争取长期、稳定的资金来源,制定科研数据管理政策,制定教育培训考核计划,提升数据馆员科研数据素养,构建区域一体化...  相似文献   

Guazia,the earliest ovule without cupule but with unique integumentary lobes     

De-Ming Wang  Le Liu  Yi Zhou  Min Qin  Mei-Cen Meng  Yun Guo  Jin-Zhuang Xue 《国家科学评论(英文版)》2022,9(4)

The earliest ovules in the Late Devonian (Famennian) are surrounded by a cupule that is involved in both protection and pollination, and generally have free integumentary lobes. Here we report a new taxon from the Famennian of China, Guazia dongzhiensis gen. et sp. nov. The terminally borne ovule is apparently acupulate (without cupule) and has four radially arranged wing-like integumentary lobes that are extensively fused, and folded lengthwise and inwards. Guazia provides evidence that not all Devonian seeds possess a cupule and it increases their diversity in integumentary lobes. This genus also suggests that the integuments develop new functions, probably including wind dispersal at the expense of the cupules.  相似文献   

浅谈如何加强当代高校美育教育中的音乐审美教育     

肖乐 《科教文汇》2020,(5):50-51

随着高校教育教学改革的不断发展,在核心素养语境下,全面培养并提高学生的综合素质已经成为当前教育首要的目标。作为高等院校,在新课改背景下,必须遵循新课标的要求,培养出"德智体美劳"全面发展的高素质复合型人才。在这样的背景下,"以美育人、以美化人"就成为当前高校实现人才培养目标的重要手段。  相似文献   

大学生择业受挫心理的表现及对策分析     

姜乐 《佳木斯教育学院学报》2012,(6):274-275

大学生择业的表现通常有:焦虑、悲观失望、嫉妒等,这些表现的原因主要有:大学生的择业观不正确,大学生对用人单位的了解不足,缺乏社会实践经验,用人单位、学校及家庭的负面影响。大学生树立正确的择业观,充分了解求职单位,积极参加实践活动,减小用人单位、学校及家庭的负面影响是减少大学生择业受挫的有力措施。  相似文献   

The weakening of steam boilers by cutting holes in the shell for domes and necks     

W. Barnet Le Van 《Journal of The Franklin Institute》1880,110(5):313-323

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Dust showers     

Washington Jones  W Barnet Le Van  Tinius Olsen  William M Henderson  Wm.D Marks 《Journal of The Franklin Institute》1880,110(2):106-114

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Vision by the light of the electric spark     

W. Le Conte Stevens 《Journal of The Franklin Institute》1882,114(5):338-342

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Observations upon the comparative advantages and inconveniences of the employment of iron wire,or bar iron,in the construction of suspension bridges of great span     

M. Le Blanc 《Journal of The Franklin Institute》1843,35(2):95-101

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