全文获取类型
收费全文 | 578篇 |
免费 | 15篇 |
专业分类
林业 | 62篇 |
农学 | 13篇 |
114篇 | |
综合类 | 40篇 |
农作物 | 3篇 |
水产渔业 | 13篇 |
畜牧兽医 | 308篇 |
园艺 | 18篇 |
植物保护 | 22篇 |
出版年
2024年 | 1篇 |
2023年 | 6篇 |
2022年 | 5篇 |
2021年 | 9篇 |
2020年 | 11篇 |
2019年 | 18篇 |
2018年 | 16篇 |
2017年 | 9篇 |
2016年 | 14篇 |
2015年 | 14篇 |
2014年 | 22篇 |
2013年 | 33篇 |
2012年 | 37篇 |
2011年 | 47篇 |
2010年 | 22篇 |
2009年 | 30篇 |
2008年 | 40篇 |
2007年 | 48篇 |
2006年 | 35篇 |
2005年 | 34篇 |
2004年 | 32篇 |
2003年 | 26篇 |
2002年 | 16篇 |
2001年 | 8篇 |
2000年 | 8篇 |
1999年 | 6篇 |
1998年 | 6篇 |
1996年 | 1篇 |
1995年 | 5篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1991年 | 3篇 |
1990年 | 2篇 |
1989年 | 4篇 |
1988年 | 4篇 |
1987年 | 1篇 |
1986年 | 5篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1977年 | 3篇 |
1973年 | 3篇 |
1972年 | 2篇 |
1971年 | 1篇 |
排序方式: 共有593条查询结果,搜索用时 109 毫秒
591.
Oberthaler KT Mauldin E McManus PM Shofer FS Sorenmo KU 《Journal of Feline Medicine and Surgery》2009,11(4):259-265
This study examined the efficacy of doxorubicin-based chemotherapy used for rescue therapy in refractory feline lymphoma. Records of 23 cats with lymphoma treated with chemotherapy who received doxorubicin for the first time in a rescue setting were reviewed. Seventeen (74%) of the 23 cats had only one treatment of doxorubicin. Five (22%) of the 23 cats had a positive response to doxorubicin and were given additional doses. The response to therapy in 4/5 of these responders could be assessed objectively, of which, two cats (9%) achieved partial remission (PR) and two cats (9%) achieved complete remission (CR). The two cats that achieved CR had differing response durations (6 weeks and greater than 47 months). Three of these five (60%) responders had also received concurrent other chemotherapy in addition to doxorubicin. Cell type and the use of concurrent chemotherapy were significant predictors of response. Cats with small-medium cell lymphomas (P=0.001) and cats that received concurrent chemotherapy with doxorubicin rescue (P=0.007) were more likely to respond favorably. This study suggests that doxorubicin-based chemotherapy is not an effective rescue protocol for feline lymphoma. 相似文献
592.
Karin Thygesen Lise Nistrup Jørgensen Kim Skov Jensen Lisa Munk 《European journal of plant pathology / European Foundation for Plant Pathology》2009,123(4):435-447
Field experiments, involving various fungicide strategies with pyraclostrobin and/or epoxiconazole were carried out in 2004
and 2005, with the overall purpose of monitoring the evolution of fungicide sensitivity in Mycosphaerella graminicola on different isolates per leaf, leaf levels at different points of time, and points in the field. Sensitivity was assessed
on single isolates by means of epoxiconazole EC50-values, and monitoring of the G143A-mutation, which confers strobilurin resistance. In both years, fungicide application
strategies did not cause any significant shifts in epoxiconazole sensitivity of the population median or variance over time
compared to the starting population. In 2004, the end-population median was the same for all sprayed strategies, although
compared to untreated median sensitivities were higher. In 2005, epoxiconazole sensitivity levels were similar on individual
flag leaves and different points in the field. Measured on all isolates the EC50-values ranged from 0.007–1.15 mg l−1. In 2004, due to the high initial level of pyraclostrobin resistance, stabilisation of pyraclostrobin resistance was observed
following the various combination treatments. No correlation between epoxiconazole sensitivities and pyraclostrobin resistance
were observed. High input strategies using a mixture of epoxiconazole and pyraclostrobin resulted in the best control and
yield response. A subpopulation of the isolates from 2004 was also screened for sensitivity towards five different triazoles
of which tebuconazole proved to be least sensitive, and this could further be split into two subpopulations. 相似文献
593.
Marika Lyly Marjatta Salmenkallio‐Marttila Tapani Suortti Karin Autio Kaisa Poutanen Liisa Lhteenmki 《Cereal Chemistry》2003,80(5):536-541
The aim was to study the effect of concentration and molecular weight of four different β‐glucan preparations on the perceived sensory quality of a beverage prototype. The correlations between sensory and instrumental measures were investigated. Two of the preparations were brantype containing high molecular weight β‐glucan, two were more‐processed low molecular weight β‐glucan preparations. Twelve beverage samples containing 0.25–2% β‐glucan and one reference sample thickened with carboxymethyl cellulose (CMC) were profiled by a sensory panel and analyzed by instrumental measurements (viscosity and molecular weight). Sensory profiles of the beverages varied at the same concentration of β‐glucan, depending on β‐glucan preparation. Beverages made with the bran‐type preparations were more viscous and had higher perceived thickness than beverages made with more‐processed, low molecular weight preparations. Moderate correlations were obtained between perceived thickness and sliminess and instrumental viscosity at all shear rates between 26 and 100/sec (r = 0.63–0.78; P ≤ 0.001). Technologically, more‐processed β‐glucan preparations are easier to add into a beverage in amounts sufficient for achieving a physiologically functional amount of β‐glucan in a product. 相似文献