全文获取类型
收费全文 | 723篇 |
免费 | 78篇 |
专业分类
林业 | 58篇 |
农学 | 36篇 |
基础科学 | 2篇 |
137篇 | |
综合类 | 68篇 |
农作物 | 31篇 |
水产渔业 | 70篇 |
畜牧兽医 | 330篇 |
园艺 | 13篇 |
植物保护 | 56篇 |
出版年
2024年 | 3篇 |
2023年 | 5篇 |
2022年 | 9篇 |
2021年 | 28篇 |
2020年 | 32篇 |
2019年 | 50篇 |
2018年 | 28篇 |
2017年 | 23篇 |
2016年 | 39篇 |
2015年 | 35篇 |
2014年 | 31篇 |
2013年 | 37篇 |
2012年 | 61篇 |
2011年 | 65篇 |
2010年 | 32篇 |
2009年 | 22篇 |
2008年 | 33篇 |
2007年 | 45篇 |
2006年 | 34篇 |
2005年 | 37篇 |
2004年 | 31篇 |
2003年 | 33篇 |
2002年 | 30篇 |
2001年 | 4篇 |
2000年 | 7篇 |
1998年 | 2篇 |
1997年 | 7篇 |
1996年 | 4篇 |
1995年 | 4篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1992年 | 3篇 |
1991年 | 1篇 |
1988年 | 4篇 |
1987年 | 1篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1965年 | 1篇 |
1962年 | 1篇 |
1955年 | 1篇 |
1941年 | 1篇 |
1937年 | 1篇 |
1936年 | 1篇 |
1933年 | 1篇 |
1931年 | 1篇 |
排序方式: 共有801条查询结果,搜索用时 0 毫秒
91.
92.
93.
Effects of esmolol on systemic hemodynamics and heart rate variability measured using the Analgesia/Nociception Index in resuscitated piglets with Pseudomonas aeruginosa septic shock 下载免费PDF全文
Emmanuel Boselli MD PhD Matthias Jacquet‐Lagrèze MD Jean‐Yves Ayoub DVM Lionel Bouvet MD PhD Olivier Dauwalder PharmD PhD Christelle Mansour DVM Thomas Margez Eng Christian Paquet Eng Damien Restagno MSc Bernard Allaouchiche MD PhD Jeanne‐Marie Bonnet‐Garin DVM PhD Stéphane Junot DVM PhD 《Journal of Veterinary Emergency and Critical Care》2018,28(5):447-456
94.
95.
Kelmer E Kelmer G Kerl ME 《The Canadian veterinary journal. La revue veterinaire canadienne》2007,48(8):852-854
A 13-year-old, intact male, golden retriever was presented for glossomegaly. A diagnosis of a caudal lingual abscess was made by fine needle aspiration under general anesthesia. The dog showed marked clinical improvement following abscess drainage. Lingual abscesses should be included as a differential diagnosis in any dog with an unexplained acute glossomegaly. 相似文献
96.
Sandra Domenek Lothar Brendel Marie‐Hlne Morel Stphane Guilbert 《Cereal Chemistry》2004,81(3):423-428
The influence of the network structure of wheat gluten on the barrier properties against enzymes was investigated in vitro. The changes in the network structure were introduced by different temperature treatments. The modifications were assessed with solubility studies of wheat gluten proteins in sodium dodecyl sulfate (SDS). The physical barrier properties of wheat gluten membranes were investigated with transport studies examining the transfer of a model protein with no enzymatic activity (BSA) through gluten membranes. The protein network was an effective barrier for BSA, although lightly cross‐linked films were mechanically instable. Membrane breaks occurred in function of the cross‐linking density (percentage of SDS‐insoluble proteins) after only 24 hr for lightly cross‐linked films (≈30% SDS‐insoluble proteins), while highly cross‐linked membranes (≈80% SDS‐insoluble protein) were tight up to more than 33 days. The digestion experiments of the gluten films with pepsin showed that the hydrolysis of wheat gluten films with >72% of SDS‐insoluble protein was significantly retarded. In conclusion, technological treatments to increase the cross‐linking density of gluten have the potential to slow the digestion of cereal‐based foodstuff and to reduce the degradation rate of composite biomaterials. 相似文献
97.
98.
Hilde Herland Margrethe Esaiassen Marie Cooper Ragnar L. Olsen 《Aquaculture Research》2009,41(1):95-102
Trimethylamine oxide (TMAO) is found at high levels in wild Atlantic cod. Trimethylamine oxide is reduced to trimethylamine (TMA) during iced storage. In this study, the levels of TMAO and TMA in wild and farmed cod and the impact of storage, gender and season on these levels were investigated. Wild cod had higher levels of TMAO than farmed cod. Wild cod also had higher levels of TMA after 15 days of iced storage. Farmed cod were found to have levels of TMA‐N <5 mg/100 g after 15 days of iced storage, which is below the maximum permitted level for fresh fish. Therefore, TMA appears to be an unsuitable measure of freshness in farmed cod. Female farmed cod had higher levels of TMAO than male farmed cod; no such difference between genders was found in wild cod. Female and male farmed cod had similar levels of TMA after post‐mortem iced storage. The hepatosomatic index (HSI) of female farmed cod was higher than that seen in male cod and this may be the underlying reason for the differences in muscle TMAO. Levels of TMAO in male farmed cod were higher during the autumn and were correlated with a larger HSI during the same period. 相似文献
99.
Øystein Wessel Elisabeth F. Hansen Marie Løvoll Makoto Inami Asbjørn Husby Gesa Kruse Maria K. Dahle Espen Rimstad 《Journal of fish diseases》2020,43(9):1039-1048
Piscine orthoreovirus infects various salmonid fish species, and the infection is associated with diseases such as heart and skeletal muscle inflammation (HSMI) in farmed Atlantic salmon (Salmo salar). There are no vaccines available or genetically selected resistant hosts that can efficiently control piscine orthoreovirus (PRV) infection. Currently, the only prophylactic measure against PRV is general biosecurity measures aiming to break the transmission cycle. Methods to eradicate infectious virus from contaminated facilities are desirable, but the knowledge on how to inactivate PRV is lacking. A major bottleneck for inactivation studies is the lack of ability to propagate PRV in cell culture. Therefore, in this study we developed an in vivo model for detection of infectious PRV particles after treatment of the virus with inactivation tools such as heat, pH, iodine, UV and commercially available disinfectants. The results show that standard iodine treatment is efficient in inactivation of the virus, and similarly are high and low pH extremes and treatment with Virocid, a commercially available disinfectant. A UV dose of at least 50 mJ/cm2 is required for inactivation, and the virus has high resistance against heat treatment. 相似文献
100.
Klein RF Allard J Avnur Z Nikolcheva T Rotstein D Carlos AS Shea M Waters RV Belknap JK Peltz G Orwoll ES 《Science (New York, N.Y.)》2004,303(5655):229-232
The development of osteoporosis involves the interaction of multiple environmental and genetic factors. Through combined genetic and genomic approaches, we identified the lipoxygenase gene Alox15 as a negative regulator of peak bone mineral density in mice. Crossbreeding experiments with Alox15 knockout mice confirmed that 12/15-lipoxygenase plays a role in skeletal development. Pharmacologic inhibitors of this enzyme improved bone density and strength in two rodent models of osteoporosis. These results suggest that drugs targeting the 12/15-lipoxygenase pathway merit investigation as a therapy for osteoporosis. 相似文献