全文获取类型
收费全文 | 223篇 |
免费 | 17篇 |
专业分类
林业 | 9篇 |
农学 | 7篇 |
基础科学 | 1篇 |
28篇 | |
综合类 | 31篇 |
农作物 | 5篇 |
水产渔业 | 4篇 |
畜牧兽医 | 139篇 |
园艺 | 7篇 |
植物保护 | 9篇 |
出版年
2023年 | 3篇 |
2022年 | 3篇 |
2021年 | 6篇 |
2020年 | 13篇 |
2019年 | 9篇 |
2018年 | 10篇 |
2017年 | 8篇 |
2016年 | 10篇 |
2015年 | 7篇 |
2014年 | 12篇 |
2013年 | 17篇 |
2012年 | 17篇 |
2011年 | 15篇 |
2010年 | 8篇 |
2009年 | 7篇 |
2008年 | 16篇 |
2007年 | 20篇 |
2006年 | 5篇 |
2005年 | 4篇 |
2004年 | 8篇 |
2003年 | 5篇 |
2002年 | 5篇 |
2001年 | 1篇 |
2000年 | 3篇 |
1999年 | 1篇 |
1998年 | 3篇 |
1997年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1989年 | 1篇 |
1986年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1976年 | 1篇 |
1975年 | 4篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1969年 | 1篇 |
1968年 | 1篇 |
1967年 | 3篇 |
1966年 | 2篇 |
1965年 | 2篇 |
排序方式: 共有240条查询结果,搜索用时 203 毫秒
111.
Kristen Parker Elisabeth Snead James Anthony Tawni Silver 《The Canadian veterinary journal. La revue veterinaire canadienne》2013,54(8):748-752
Blastomycosis is one of the most common systemic fungal infections in dogs in North America Pulmonary manifestations are most common; localized disease is rare. A case of localized oronasal blastomycosis mimicking oral neoplasia is described. Long-term therapy with itraconazole resulted in clinical cure. 相似文献
112.
113.
N. S. Marzanov N. A. Popov L. K. Marzanova A. N. Popov S. N. Petrov M. Kh. Tokhov A. Z. Utizhev Yu. V. Samorukov S. N. Marzanova Z. L. Dokhova Kh. Kh. Nachoev Kh. A. Amerkhanov 《Russian Agricultural Sciences》2011,37(3):244-248
One BLAD-carrier Black-and-White Holstein bull is revealed. The CV allele of Black-and-White and Red-and-White Holstein bulls is absent. Bulls of black-and-white, brown, and red genealogical roots are investigated with the use of the kappa-casein gene. The prevalence of genotypes κ-CNAA and κ-CNAB is shown. Disruption of genetic equilibrium is noted in Red Steppe bulls (χ2 = 5.1; df = 1; P < 0.05). The κ-CNE allele is absent. A unidirectional breeding program is established for selecting bulls for the purpose of producing progeny with a high milk yield. The antigen pool of blood groups of Brown Swiss cows is divided into three groups: with a rare level of frequency of occurrence, from 0 to 0.3; average, from 0.3 to 0.5; and high, from 0.5 and higher. Cows of this breed are characterized by prevalence of allele κ-CNB over κ-CNA. 相似文献
114.
David J. Sessa Kristen K. WoodsAbdellatif A. Mohamed Debra E. Palmquist 《Industrial Crops and Products》2011,33(1):57-62
Melt-processed blends of zein and polyvinylpyrrolidone (PVP) of varying molecular weights (55K, 360K and 1.3M) were compared based on mechanical and thermal properties. Generally, all samples stored at 50% RH exhibited a slight improvement in tensile strength, with the PVP360K samples showing the greatest improvement. At the higher levels of PVP, samples stored at 70% RH showed a decrease in tensile strength. Elongation was also more significantly impacted at higher humidity, with the higher levels of PVP causing greater elongation increases. Differential scanning calorimetry data for the blends showed single Tg values intermediate between the zein and PVP controls. Kinetic thermogravimetric data suggested a multi-step degradation interaction for the zein/PVP blends. Scanning electron microscope imaging of compression molded samples showed homogeneous surface contours for even the 20% PVP1.3M blend. Melt-processed blends of zein with polyvinylpyrrolidone of various molecular weights appear to be compatible. This work represents the first melt-processed blend of zein with PVP to generate a compatible blend. 相似文献
115.
Marchenko VY Alekseev AY Sharshov KA Petrov VN Silko NY Susloparov IM Tserennorov D Otgonbaatar D Savchenko IA Shestopalov AM 《Avian diseases》2012,56(1):234-237
The study provides the results of avian influenza virus surveillance in Central Asia during 2003-2009. We have analyzed 2604 samples from wild birds. These samples were collected in Kazakhstan (279), Mongolia (650), and Russia (1675). Isolated viruses from samples collected in Mongolia (13 isolates) and in Russia (4 isolates) were described. Virological analysis has shown that six isolates belong to the H3N6 subtype and five isolates belong to the H4N6 subtype. Two H1N1 influenza viruses, one H10N7 virus, two H3N8 viruses, and an H13N8 virus that is new for Central Asia have been also isolated. Samples were taken from birds of six orders, including several species preferring water and semiaquatic biotopes, one species preferring dry plain regions, and one more species that can inhabit both dry and water biotopes. 相似文献
116.
Gunn-Christie RG Flatland B Friedrichs KR Szladovits B Harr KE Ruotsalo K Knoll JS Wamsley HL Freeman KP;American Society for Veterinary Clinical Pathology 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2012,41(1):18-26
In December 2009, the American Society for Veterinary Clinical Pathology (ASVCP) Quality Assurance and Laboratory Standards committee published the updated and peer-reviewed ASVCP Quality Assurance Guidelines on the Society's website. These guidelines are intended for use by veterinary diagnostic laboratories and veterinary research laboratories that are not covered by the US Food and Drug Administration Good Laboratory Practice standards (Code of Federal Regulations Title 21, Chapter 58). The guidelines have been divided into 3 reports: (1) general analytical factors for veterinary laboratory performance and comparisons; (2) hematology, hemostasis, and crossmatching; and (3) clinical chemistry, cytology, and urinalysis. This particular report is one of 3 reports and documents recommendations for control of preanalytical, analytical, and postanalytical factors related to urinalysis, cytology, and clinical chemistry in veterinary laboratories and is adapted from sections 1.1 and 2.2 (clinical chemistry), 1.3 and 2.5 (urinalysis), 1.4 and 2.6 (cytology), and 3 (postanalytical factors important in veterinary clinical pathology) of these guidelines. These guidelines are not intended to be all-inclusive; rather, they provide minimal guidelines for quality assurance and quality control for veterinary laboratory testing and a basis for laboratories to assess their current practices, determine areas for improvement, and guide continuing professional development and education efforts. 相似文献
117.
Vap LM Harr KE Arnold JE Freeman KP Getzy K Lester S Friedrichs KR;American Society for Veterinary Clinical Pathology 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2012,41(1):8-17
In December 2009, the American Society for Veterinary Clinical Pathology (ASVCP) Quality Assurance and Laboratory Standards committee published the updated and peer-reviewed ASVCP Quality Assurance Guidelines on the Society's website. These guidelines are intended for use by veterinary diagnostic laboratories and veterinary research laboratories that are not covered by the US Food and Drug Administration Good Laboratory Practice standards (Code of Federal Regulations Title 21, Chapter 58). The guidelines have been divided into 3 reports: (1) general analytical factors for veterinary laboratory performance and comparisons; (2) hematology, hemostasis, and crossmatching; and (3) clinical chemistry, cytology, and urinalysis. This particular report is one of 3 reports and provides recommendations for control of preanalytical and analytical factors related to hematology for mammalian and nonmammalian species, hemostasis testing, and crossmatching and is adapted from sections 1.1 and 2.3 (mammalian hematology), 1.2 and 2.4 (nonmammalian hematology), 1.5 and 2.7 (hemostasis testing), and 1.6 and 2.8 (crossmatching) of the complete guidelines. These guidelines are not intended to be all-inclusive; rather, they provide minimal guidelines for quality assurance and quality control for veterinary laboratory testing and a basis for laboratories to assess their current practices, determine areas for improvement, and guide continuing professional development and education efforts. 相似文献
118.
119.
120.