Antibacterial Efficacy of Several Surgical Hand Preparation Products Used by Veterinary Students          下载免费PDF全文

Po‐Yen Chou  Aimie J. Doyle  Shiori Arai  Pierre J. Burke  Trina R. Bailey 《Veterinary surgery : VS》2016,45(4):515-522

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四川武隆山区马铃薯晚疫病流行规律及品种抗病力的观察     

邓新文  周继富 《植物保护学报》1964,3(1):86-87

武隆山区,位于四川盆地东南边缘,与贵州接壤。马铃薯晚疫病历年的流行在这一山区的不同海拔高度上有显著的差异(表1)。同一地区历年中心病株出现的迟早和流行速度是气候条件、特别是降雨和相对湿度所决定的。通常在高山地区,中心病株出现较迟。这首先与马铃薯出苗期和发育速度有关(表2)。马铃薯生育期与中心病株出现日期的关系也从同一地区的不同品种中表现出来(表3)。我们几年来在地势、土壤、海拔高度等条件大致相同的情况下对不同马铃薯品种进行观察的结果发现田间抗病力有显著差异,抗病力强的品种  相似文献   

Therapeutic potential of amniotic fluid stem cells to treat bilateral ovarian dystrophy in dairy cows in a subtropical region          下载免费PDF全文

L‐B Chang  S‐Y Peng  C‐J Chou  Y‐J Chen  J‐S Shiu  P‐A Tu  S‐X Gao  Y‐C Chen  T‐K Lin  S‐C Wu 《Reproduction in domestic animals》2018,53(2):433-441

Amniotic fluid is a rich source of multipotent mesenchymal stem cells (MSCs). Amniotic fluid stem cells (AFSCs) have become a new source of stem cells; they have low immunogenicity and are easily harvested. For this reason, they may be useful in clinical tissue engineering. Moreover, AFSCs have anti‐inflammatory properties and can repair tissues. This study evaluated the utility of AFSC injection to treat bilateral ovarian dystrophy in Holstein‐Friesian cows. Bovine AFSCs (BAFSCs) were collected at slaughter from Holstein‐Friesian cows during the third or fourth month of pregnancy and cultured in vitro. The BAFSCs began to show a fibroblast‐like morphology. They were positive for β‐integrin, CD44, CD73, CD106 and Oct4 and negative for CD34 and CD45. After induction, the cells differentiated into mesodermal lineages. Bilateral ovarian dystrophy was confirmed by ultrasonography in 16 lactating cows. The subsequent experiment lasted 15 weeks. Serum was collected weekly to analyse progesterone concentrations, and weekly ultrasonography recorded ovarian changes. Each cow was equipped with an automatic heat detection system to facilitate oestrus observation and breeding records. The progesterone concentration of two cows in the treatment group (25%) significantly increased during weeks 10–15. On ultrasonography, the treatment group demonstrated mature follicles after BAFSCs injection, and foetuses were visualized approximately 40 days after artificial insemination (AI). Oestrus rates in the control and treatment groups were 0% (0/8) and 50% (4/8), respectively; pregnancy rates were 0% (0/8) and 25% (2/8), respectively. Calves were successfully delivered in both cases of pregnancy. These results show that BAFSCs can alleviate bovine ovarian dystrophy and restore fertility.  相似文献   

宁夏黄土丘陵区杏树栽培技术研究     

张源润  季波  许畴  蔡进军  李娜 《陕西林业科技》2007,(1):89-92

本文从园地选择与规划、育苗、品种选择、土肥水管理、整形修剪、花果管理、病虫害防治、灾害天气预防、果实采收等方面介绍了适宜于宁夏黄土丘陵区仁用杏、鲜食杏及加工杏的规范化栽培技术。  相似文献   

Vegetation recovery monitoring and assessment at landslides caused by earthquake in Central Taiwan   总被引：1，自引：0，他引：1  

Wen-Tzu Lin  Wen-Chieh Chou  Chao-Yuan Lin  Pi-Hui Huang  Jing-Shyan Tsai 《Forest Ecology and Management》2005,210(1-3):55-66

Massive landslides, caused by the catastrophic Chi-Chi earthquake in 1999, occurred at the Jou-Jou Mountain area in the Wu-Chi basin, Taiwan. Multi-temporal satellite images and digital elevation models coupled with GIS were used to process the vegetation index analysis for identifying landslide sites and calculating the vegetation recovery rate (VRR). Topographic information for these areas was extracted. Eight hundred twenty-nine hectares of landslide area was extracted from multi-date NDVI images by combining the image differencing method with the change detection threshold. Over 2 years of monitoring and assessing, the vegetation recovery rate reached 58.93% original vegetation regeneration in the landslide areas. Soil moisture is one of the most important environmental factors for vegetation recovery in the landslide sites. The analyzed results provide very useful information for decision making and policy planning in the landslide area.  相似文献   

DECIDUOUS AND DECIDUOUS-EVERGREEN FORESTS IN NORTHEAST CHINA     

Chou Yiliang Liu JianweiNortheast Forestry University 《林业研究》1991,(1)

Two types of forests in Northeast China is divided in this paper,that is,the decidu-ous forests in the northern part and the deciduous-evergreen forests in the eastern part.Both distri-butions of the two types of forests have also been pre sented.Meanwhile,the development and suc-cession as well as components of forests have been studied in detail.in the end,the vertical distribu-tion of the deciduous forests have been shown,in which,the near-temperate cold temperate decidu-ous coniferous forests are distributing in the low elevation area between 450m—600m from the northto the south,the typical siberian cold temperate deciduous coniferous forests are widely distributingfrom 450m—820m in the north to 600m—1050m in the south, the humid cold temperate deciduousconiferous forests can only be found in high elevation area from 820m—1100m in the north to1050m—1380m in the south,the cold temperate deciduous coniferous open forests can seldom ap-pear at the top of a few peaks.  相似文献   

Deciduous and deciduous—evergreen forests in Northeast China     

Chou Yiliang  Liu Jianwei 《林业研究》1991,2(1):9-16

Two types of forests in Northeast China is divided in this paper, that is, the deciduous forests in the northern part and the deciduous—evergreen forests in the eastern part. Both distributions of the two types of forests have also been presented. Meanwhile, the development and succession as well as components of forests have been studied in detail. In the end, the vertical distribution of the deciduous forests have been shown, in which, the near—temperate cold temperate deciduous coniferous forests are distributing in the low elevation area between 450m—600m from the north to the south, the typical Siberian cold temperate deciduous coniferous forests are widely distributing from 450m–820m in the north to 600m-1050m in the south, the humid cold temperate deciduous coniferous forests can only be found in high elevation area from 820m–1100m in the north to 1050m–1380m in the south, the cold temperate deciduous coniferous open forests can seldom appear at the top of a few peaks.  相似文献   

Enzymatic production of galactooligosaccharides by beta-galactosidase from Bifidobacterium longum BCRC 15708     

Hsu CA  Lee SL  Chou CC 《Journal of agricultural and food chemistry》2007,55(6):2225-2230

The production of galactooligosaccharides (GOSs) by transgalactosylation using beta-galactosidase from Bifidobacterium longum BCRC 15708 was studied. Other than lactose, galactose, and glucose, two types of GOSs, tri- and tetrasaccharides, were formed after beta-galactosidase action on 40% lactose. Trisaccharides were the major type of GOS formed. Generally, an increase of the initial lactose concentration in the reaction mixture resulted in a higher GOS production. A maximum yield of 32.5% (w/w) GOSs could be achieved from 40% lactose solution at 45 degrees C, pH 6.8, when the lactose conversion was 59.4%. The corresponding productivity of GOSs was 13.0 g/(L.h). Transgalactosylation activity of beta-galactosidase from a test organism showed a relatively lower sensitivity toward glucose and galactose than that from other organisms. The addition of 5% or 10% glucose or galactose to the reaction mixture did not significantly (p>0.05) reduce the transgalactosylation reaction of beta-galactosidase.  相似文献   

Changes in the contents of sugars and organic acids during the ripening and storage of sufu, a traditional Oriental fermented product of soybean cubes     

Moy YS  Chou CC 《Journal of agricultural and food chemistry》2010,58(24):12790-12793

In the present study, sufu, an oriental fermented product of soybeans, was prepared by ripening the tofu cubes in Aspergillus oryzae fermented rice-soybean koji mash for 16 days at 37 °C. The sufu product was further kept at room temperature for another 30 days. Examining the changes in the sugar content revealed that stachyose, raffinose, and sucrose contents of tofu and rice-soybean koji granules decreased while levels of glucose and fructose increased during the ripening period and after storage. Glucose was the most abundant sugar detected. Four organic acids, including oxalic, lactic, acetic, and citric acid, were detected in the sufu product and koji granules after ripening. Generally, the contents of these organic acid increased as the ripening period was extended. Among them, acetic acid was the most highly detected.  相似文献   

C-phycocyanin, a very potent and novel platelet aggregation inhibitor from Spirulina platensis     

Hsiao G  Chou PH  Shen MY  Chou DS  Lin CH  Sheu JR 《Journal of agricultural and food chemistry》2005,53(20):7734-7740

The aim of this study was to systematically examine the inhibitory mechanisms of C-phycocyanin (C-PC), one of the major phycobiliproteins of Spirulina platensis (a blue-green alga), in platelet activation. In this study, C-PC concentration-dependently (0.5-10 nM) inhibited platelet aggregation stimulated by agonists. C-PC (4 and 8 nM) inhibited intracellular Ca2+ mobilization and thromboxane A2 formation but not phosphoinositide breakdown stimulated by collagen (1 microg/mL) in human platelets. In addition, C-PC (4 and 8 nM) markedly increased levels of cyclic GMP and cyclic GMP-induced vasodilator-stimulated phosphoprotein (VASP) Ser(157) phosphorylation. Rapid phosphorylation of a platelet protein of Mw 47,000 (P47), a marker of protein kinase C activation, was triggered by phorbol-12,13-dibutyrate (150 nM). This phosphorylation was markedly inhibited by C-PC (4 and 8 nM). In addition, C-PC (4 and 8 nM) markedly reduced the electron spin resonance (ESR) signal intensity of hydroxyl radicals in collagen (1 microg/mL)-activated platelets. The present study reports on a novel and very potent (in nanomolar concentrations) antiplatelet agent, C-PC, which is involved in the following inhibitory pathways: (1) C-phycocyanin increases cyclic GMP/VASP Ser157 phosphorylation and subsequently inhibits protein kinase C activity, resulting in inhibition of both P47 phosphorylation and intracellular Ca2+ mobilization, and (2) C-PC may inhibit free radicals (such as hydroxyl radicals) released from activated platelets, which ultimately inhibits platelet aggregation. These results strongly indicate that C-PC appears to represent a novel and potential antiplatelet agent for treatment of arterial thromboembolism.  相似文献