全文获取类型
收费全文 | 126篇 |
免费 | 3篇 |
专业分类
林业 | 7篇 |
农学 | 13篇 |
基础科学 | 1篇 |
13篇 | |
综合类 | 1篇 |
农作物 | 23篇 |
水产渔业 | 9篇 |
畜牧兽医 | 47篇 |
园艺 | 2篇 |
植物保护 | 13篇 |
出版年
2022年 | 4篇 |
2021年 | 4篇 |
2020年 | 4篇 |
2019年 | 3篇 |
2018年 | 3篇 |
2017年 | 2篇 |
2016年 | 3篇 |
2015年 | 6篇 |
2014年 | 6篇 |
2013年 | 11篇 |
2012年 | 11篇 |
2011年 | 12篇 |
2010年 | 6篇 |
2009年 | 2篇 |
2008年 | 6篇 |
2007年 | 5篇 |
2006年 | 8篇 |
2005年 | 8篇 |
2004年 | 12篇 |
2003年 | 6篇 |
2002年 | 6篇 |
1995年 | 1篇 |
排序方式: 共有129条查询结果,搜索用时 15 毫秒
121.
Takabatake M Takuwa Y Takuwa N Yasuno H Matsumoto S Shibutani M Mitsumori K 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2008,70(5):483-485
We report a case of mixed epithelial and stromal tumor of the kidney (MESTK) in a 32-week-old heterozygous sphingosine 1-phosphate-2 (S1P2) receptor deficient female mouse. A white solid mass replacing the left kidney was observed at the left retroperitoneal wall. Histologically, the tumor mass consisted of dimorphic cellular components of epithelial and stromal cells. Epithelial cells formed various sized irregular-shaped tubular structures resembling renal tubules surrounded by stromal cells. Immunohistochemically, epithelial cells were positive for cytokeratin, while stromal cells showed positive immunoreactivity with alpha-smooth muscle actin as well as vimentin. Based on the morphological and immunohistochemical findings, this tumor was diagnosed as a MESTK. 相似文献
122.
Horiuchi Y Nakajima Y Nariai Y Asanuma H Kuwabara M Yukawa M 《Veterinary immunology and immunopathology》2007,118(3-4):179-185
The canine immune system undergoes continuous remodeling with advancing age. We measured the Th1/Th2 balance in peripheral blood lymphocytes (PBLs) obtained from 23 Beagles ranging in age from 0.5 to 11.8 years by flow cytometric analysis using intracellular cytokine staining. The percentage of CD4 cells producing interferon-gamma (Th1) increased with age. The percentage of CD4 cells producing interleukin-4 (Th2) increased but much less so. In conclusion, we demonstrated that the Th1/Th2 balance in canine peripheral blood could be measured by this flow cytometry technique and the Th1/Th2 balance inclined to dominance of the Th1 subpopulation in PBLs as the dog matured. 相似文献
123.
Yusuke Kuroda Seigo Hayashi Soichiro Hagio Masayoshi Abe Satoshi Furukawa Dai Nakae 《Journal of toxicologic pathology》2014,27(2):147-151
There are no reported spontaneous cases of pancreatic ductal adenocarcinoma (PDAC), and there are few reports about chemically-induced PDAC in rats. We encountered a PDAC in a Wistar Hannover GALAS rat that had been subjected to a medium-term multiorgan carcinogenicity bioassay. This article describes the histological and histochemical findings of the tumor. The tumor was located in the pancreatic tissue and had not invaded the liver parenchyma or the mucosal layer of the alimentary tract. The tumor cells were atypical and were mainly arranged in small tubules. In addition, abundant stroma and mucus production were observed in the tumor. In an immunohistochemical examination, the tumor cells were positive for cytokeratin, Sox9 and pancreas duodenum homeobox 1 and negative for amylase 2A and insulin. Therefore, the tumor was diagnosed as a PDAC based on its histological and histochemical findings. We considered that the tumor was caused by the carcinogens administered during the abovementioned bioassay. 相似文献
124.
Tadao Wagatsuma Matsuo Uemura Wataru Mitsuhashi Masayoshi Maeshima Satoru Ishikawa Takeshi Kawamura Tetsuya Murayama Yoshihito Shiono Md. Shahadat Hossain Khan Keitarou Tawaraya 《Soil Science and Plant Nutrition》2005,51(1):135-139
It has been suggested that plasma membrane (PM) lipids play a major role in aluminum (Al) tolerance; however, no direct investigations have been carried out using PM lipids from root-tips. Here we report a new technique for PM isolation as an alternative to the laborious two-polymer phase partitioning method that is commonly applied, as follows: 1) separation of protoplasts from 1-cm root-tip portions by enzymatic digestion, 2) attachment of the purified protoplasts to glass plates coated with polylysine, 3) preparation of PM ghosts by successive burst of the attached protoplasts using three separate buffer solutions (25 mM PIPES, 5 mM EDTA, and 2 mM MgCl2 , at pH 7.0) with slow stirring for 60 s. The PMs were confirmed to be devoid of organelle membranes by fluorescence microscopy, thin layer chromatography (TLC) and western blot analysis. The PM lipids obtained were found to be useful for studies on their differential permeability and lipid composition between lines of triticale or cultivars of maize under Al stress. 相似文献
125.
126.
Minh Tu NT Onishi Y Choi HS Kondo Y Bassore SM Ukeda H Sawamura M 《Journal of agricultural and food chemistry》2002,50(10):2908-2913
The volatile components of Citrus sphaerocarpa Tanaka (Kabosu) cold-pressed peel oil were investigated by chemical and sensory analyses. Monoterpene hydrocarbons (more than 94.6%) were predominant in Kabosu peel oil, with limonene and myrcene accounting for the major proportions (70.5% and 20.2%, respectively). The Kabosu oxygenated fraction was characterized by quantitative abundance in aldehydes and a relatively wide variety of alcohols. The weight percentages of aldehydes, alcohols, and esters in Kabosu cold-pressed oil were 1.3%, 0.1%, and 0.1%, respectively. Aroma extract dilution analysis was employed for determination of the odors of Kabosu volatile components, flavor dilution factors, and relative flavor activities. Gas chromatography/olfactometry using Kabosu cold-pressed oil and its oxygenated fraction completed by a chiral analysis revealed that (R)-(+)-citronellal is a characteristic element of Kabosu peel oil odor. Careful sniff testing demonstrated that aqueous solutions of both 0.25% and 0.016% (R)-(+)-citronellal gave an odor similar to that of Kabosu. 相似文献
127.
128.
Honglikith Daoluang Harada Masayoshi Hiramatsu Kazuaki Tabata Toshinori Ozaki Akinori 《Paddy and Water Environment》2022,20(1):153-175
Paddy and Water Environment - This study focuses on a method for improving water quality via anoxification recovery using underwater LED treatment in an organically polluted reservoir. The main aim... 相似文献
129.
Tran?Tuan?Thach Masayoshi?HaradaEmail author Kazuaki?Hiramatsu Toshinori?Tabata 《Paddy and Water Environment》2018,16(4):665-686
In closed water bodies with significant organic pollution, anoxification due to thermal stratification leads to the elution of nitrogen and phosphorus from the bottom sediment and the generation of sulfide, resulting in further degradation of the water environment. This study focuses on the water quality dynamics in an organically polluted reservoir exhibiting long-term anoxification using two approaches: (1) field observations of seasonal changes in vertical profiles of dissolved oxygen, nitrogen, phosphorus, and sulfide and (2) construction of a water quality prediction model based on an ecosystem model incorporated with anaerobic biochemical processes. Iron and sulfate reduction occurred simultaneously because nitrate–nitrogen was reduced by denitrifying bacteria after the anoxification, and iron reduction became the main factor of the increase in ammonium–nitrogen and phosphate–phosphorus. The redox state of the bottom sediment surface, when anoxification began to occur, greatly affected the water quality dynamics caused by gradual reductive reactions under anaerobic conditions. Furthermore, the calculation accuracy of ammonium–nitrogen, phosphate–phosphorus, and sulfide was highly improved by modifying the conventional model based on the field observations. The characteristics of water quality under anaerobic conditions were sufficiently reflected in the upgraded ecosystem model. The proposed water quality prediction model could be used to quantitatively estimate the water environment dynamics in organically polluted water bodies. The model could be developed further in the future to solve the problems caused by long-term anoxification. 相似文献