全文获取类型
收费全文 | 575篇 |
免费 | 30篇 |
专业分类
林业 | 64篇 |
农学 | 28篇 |
77篇 | |
综合类 | 31篇 |
农作物 | 21篇 |
水产渔业 | 66篇 |
畜牧兽医 | 268篇 |
园艺 | 11篇 |
植物保护 | 39篇 |
出版年
2023年 | 2篇 |
2022年 | 15篇 |
2021年 | 21篇 |
2020年 | 13篇 |
2019年 | 8篇 |
2018年 | 13篇 |
2017年 | 9篇 |
2016年 | 14篇 |
2015年 | 25篇 |
2014年 | 32篇 |
2013年 | 43篇 |
2012年 | 36篇 |
2011年 | 45篇 |
2010年 | 19篇 |
2009年 | 21篇 |
2008年 | 33篇 |
2007年 | 29篇 |
2006年 | 37篇 |
2005年 | 32篇 |
2004年 | 23篇 |
2003年 | 25篇 |
2002年 | 15篇 |
2001年 | 15篇 |
2000年 | 8篇 |
1999年 | 10篇 |
1998年 | 3篇 |
1997年 | 4篇 |
1996年 | 5篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1991年 | 3篇 |
1990年 | 2篇 |
1989年 | 5篇 |
1988年 | 4篇 |
1987年 | 7篇 |
1986年 | 5篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1975年 | 3篇 |
1974年 | 3篇 |
1973年 | 3篇 |
1972年 | 3篇 |
1970年 | 1篇 |
1969年 | 1篇 |
1968年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有605条查询结果,搜索用时 62 毫秒
31.
32.
33.
34.
35.
36.
Ken‐ichi Kudo Fuminori Kawabata Toumi Nomura Ayumi Aridome Shotaro Nishimura Shoji Tabata 《Animal Science Journal》2014,85(10):904-909
We isolated chicken taste buds and used a real‐time Ca2+ imaging technique to investigate the functions of the taste cells. With RT‐PCR, we found that isolated chicken taste bud‐like cell subsets express chicken gustducin messenger RNA. Immunocytochemical techniques revealed that the cell subsets were also immunopositive for chicken gustducin. These results provided strong evidence that the isolated cell subsets contain chicken taste buds. The isolated cell subsets were spindle‐shaped and approximately 61–75 μm wide and 88–98 μm long, and these characteristics are similar to those of sectional chicken taste buds. Using Ca2+ imaging, we observed the buds' response to 2 mmol/L quinine hydrochloride (a bitter substance) and their response to a mixture of 25 mmol/L L‐glutamic acid monopotassium salt monohydrate and 1 mmol/L inosine 5′‐monophosphate disodium salt, umami substances. The present study is the first morphological demonstration of isolated chicken taste buds, and our results indicate that the isolated taste buds were intact and functional approaches for examining the taste senses of the chicken using Ca2+ imaging can be informative. 相似文献
37.
Biotope roofs in Japan are usually intensive green roofs that primarily include native plants and food plants for invertebrates and a pond and stones to create a wide range of habitats. The study aimed to evaluate the survivability of planted species, and colonisation by plants and invertebrates on a biotope roof and to suggest an appropriate planting design and maintenance scheme to optimize biodiversity benefits. An intensive green roof (150 m2, substrate depth of 50 cm) was installed in 2002 on the ninth storey of a building at Chiba University, Japan. Twelve species of trees, 18 species of shrubs and 8 species of forbs (mainly native species) were planted and volcanic stones were used as mulch and to create habitats for invertebrates. No maintenance and no irrigation were applied for almost 8 years. A limited number of tree species, such as Myrica rubra and Cinnamomum camphora could grew well without maintenance and irrigation at a substrate depth of 50 cm. Overall, shrubs grew successfully and a high density planting seemed effective in increasing wind resistance. Most forbs disappeared, probably because of drought and competition with these colonising plants. Eleven plant species spontaneously colonised resulting in domination by Solidago altissima and Miscanthus sinensis. These two species were too aggressive, and selective weeding is required for species richness. In an invertebrate study, 46 species in 11 orders were observed and the highest number of invertebrate species was observed in the pond and shady areas. 相似文献
38.
39.
Soybeans in Northeast of China are one of the most importantgenetic resources in the world.In order to use themeffectively insoybean breeding,it is necessary to evaluate the maincharacteristics,especially the quality characteristics such as seedprotein content.It is reported that the PEPCase activity in soybeanseeds is positively correlated with the seed protein content andnegatively correlated with the lipid content[1].PEPCase is alsopresent in seeds of different species[2~4],and may play… 相似文献