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排序方式: 共有215条查询结果,搜索用时 31 毫秒
71.
Comparative diagnostic potential of three serological tests for abortive Q fever in goat herds 总被引:1,自引:0,他引:1
Rousset E Durand B Berri M Dufour P Prigent M Russo P Delcroix T Touratier A Rodolakis A Aubert M 《Veterinary microbiology》2007,124(3-4):286-297
Performances of an ELISA, an immunofluorescence assay (IFA) and a complement fixation test (CFT) were assessed for detecting antibodies against Coxiella burnetii after Q fever abortions in naturally infected goats. The goal of the study was to provide information useful for veterinary serodiagnosis in regard to categories of goats either experiencing Q fever abortion or not, blood sampling times and recommended cut-offs. The study was conducted on eight goat herds with evidence of C. burnetii abortions. In each herd, at least 5 goats that had aborted and 10 goats prior to parturition or at term were monitored 15, 30 and 60 days (D15, D30, D60) after the onset of Q fever abortion. The overall CFT results distribution did not differ between the two groups of goats and showed poor agreement with the ELISA results. In contrast, the ELISA and IFA results revealed comparable significant differences, but overall the ELISA test was slightly more sensitive than the IFA test. Seroprevalence, according to ELISA and IFA respectively, was higher in the aborting (88% and 82%) than in the non-aborting group (60% and 50%). High levels of serum antibodies were detected in goats post-abortion with an average of 114 %OD using ELISA and a log10(titer) of 2.4 using IFA. Strongly positive ELISA (%OD>80) and positive IFA results (log10(titers)>1.9) were significantly associated with abortion. Sampling on D15 gave the best association with ORs of 10 for ELISA and 6 for IFA. The practical interest of these results is discussed. 相似文献
72.
Determination of optimal storage temperature and duration for analysis of total and isoenzyme lactate dehydrogenase activities in canine serum and cerebrospinal fluid 下载免费PDF全文
73.
R. Barry Nehring George Schisler Luciano Chiaramonte Annie Horton Barbara Poole 《Journal of aquatic animal health》2015,27(1):50-56
While whirling disease was first observed in Rainbow Trout Oncorhynchus mykiss in 1893, the complete life cycle of Myxobolus cerebralis (Mc), the causative agent of the disease, was not understood until 1984, when it was shown to involve two obligate hosts, a salmonid fish and the aquatic oligochaete Tubifex tubifex (Tt). The viability of the triactinomyxon (TAM) actinospores produced by Tt has been well studied, and is known to be temperature dependent and measured in days and weeks. Assertions that Mc myxospores produced by infected fish remain viable for years or even decades were made during the mid-20th century, decades before the Mc life cycle was described. Moreover, the duration of myxospore viability has not been well studied since the life cycle was elucidated. In a series of time-delay treatments, we assessed the long-term viability of Mc myxospores by exposure to Mc-susceptible Tt oligochaetes and quantified TAM production. As the time delay between inoculation and incubation of Mc myxospores in sand and water and exposure to Tt oligochaetes increased, TAM production decreased exponentially. Production among the 15-d time-delay replicates was reduced 74.7% compared with the 0-d treatment. Likewise, total TAM production was reduced 94.5, 99.4, and 99.9%, respectively, in the 90-, 120-, and 180-d time-delay treatments. Linear regression analysis of our data and the absence of TAM production among replicates of Mc myxospores held at 5°C for 365 d prior to exposure to Mc-susceptible Tt oligochaetes indicate that the long-term viability of Mc myxospores is less than 1 year under the conditions of this study.
Received May 14, 2014; accepted September 27, 2014 相似文献
74.
Vigneron N Stroobant V Chapiro J Ooms A Degiovanni G Morel S van der Bruggen P Boon T Van den Eynde BJ 《Science (New York, N.Y.)》2004,304(5670):587-590
CD8 T lymphocytes recognize peptides of 8 to 10 amino acids presented by class I molecules of the major histocompatibility complex. Here, CD8 T lymphocytes were found to recognize a nonameric peptide on melanoma cells that comprises two noncontiguous segments of melanocytic glycoprotein gp100(PMEL17). The production of this peptide involves the excision of four amino acids and splicing of the fragments. This process was reproduced in vitro by incubating a precursor peptide of 13 amino acids with highly purified proteasomes. Splicing appears to occur by transpeptidation involving an acyl-enzyme intermediate. Our results reveal an unanticipated aspect of the proteasome function of producing antigenic peptides. 相似文献
75.
Teil Marie-Jeanne Blanchard Martine Moreau-Guigon Elodie Dargnat Cendrine Alliot Fabrice Bourges Catherine Desportes Annie Chevreuil Marc 《Water, air, and soil pollution》2013,224(6):1-14
Water, Air, &; Soil Pollution - This study investigated how forest soil acidification is affected by edge proximity. We measured pH(KCl) and exchangeable K, Ca, Mg and Al concentrations of the... 相似文献
76.
P. A. Janeesh Annie Abraham 《Plant foods for human nutrition (Dordrecht, Netherlands)》2013,68(2):118-123
Cardiovascular diseases, especially atherosclerosis, have found to be the dreadful diseases worldwide and therapeutic interventions using plant sources have wide therapeutic value. Vigna unguiculata (VU) leaves have been used as food and therapeutics. Hence, our study was designed to evaluate the hypolipidemic as well as anti-atherogenic potential of VU leaves in normalizing atherogenic gene expression, cholesterol profile, generation of reactive oxygen species (ROS) and antioxidant enzyme system on cholesterol fed rabbit model. For the study New Zealand white rabbits were randomly divided into four groups of six animals each and experimental period was three months; group -i - ND [normal diet (40 g feed)], group-ii- ND (normal diet) +EAVU [ethyl acetate fraction of Vigna unguiculata (150 mg/kg body weight)], group -iii- ND [normal diet ]+ CFD [cholesterol fed diet (cholesterol 1 % of 40 g feed and cholic acid 0.5 % of 40 g feed)] and group-iv - ND [normal diet] +CFD [cholesterol fed diet ]+EAVU [ethyl acetate fraction of Vigna unguiculata (150 mg/kg body weight)]. Atherosclerosis was induced by feeding the rabbit with cholesterol (1 % of 40 g feed) and cholic acid (0.5 % of 40 g feed). Supplementation of EAVU normalized cholesterol profile, generation of reactive oxygen species (ROS), lipid peroxidation products like thiobarbituric acid reactive substance (TBARS), antioxidant system and important genes of cardiovascular diseases like interleukin-10 (IL 10), paraoxanase-1 (PON I), interleukin-6 (IL 6), and cyclooxygenase-2 (Cox 2) to near normal level as compared with normal diet. The result obtained showed the antioxidant as well as anti-atherogenic potential of Vigna unguiculata leaves in ameliorating cholesterol induced atherosclerosis, and thus it is good task to include VU leaves in daily diet for the prevention of cardiovascular diseases especially atherosclerosis. 相似文献
77.
Miclo L Roux E Genay M Brusseaux E Poirson C Jameh N Perrin C Dary A 《Journal of agricultural and food chemistry》2012,60(2):554-565
Milk proteins contain numerous potential bioactive peptides, which may be released by digestive proteases or by the proteolytic system of lactic acid bacteria during food processing. The capacity of Streptococcus thermophilus to generate peptides, especially bioactive peptides, from bovine caseins was investigated. Strains expressing various levels of the cell envelope proteinase, PrtS, were incubated with α(s1)-, α(s2)-, or β-casein. Analysis of the supernatants by LC-ESI-MS/MS showed that the β-casein was preferentially hydrolyzed, followed by α(s2)-casein and then α(s1)-casein. Numbers and types of peptides released were strain-dependent. Hydrolysis appeared to be linked with the accessibility of different casein regions by protease. Analysis of bonds hydrolyzed in the region 1-23 of α(s1)-casein suggests that PrtS is at least in part responsible for the peptide production. Finally, among the generated peptides, 13 peptides from β-casein, 5 from α(s2)-casein, and 2 from α(s1)-casein have been reported as bioactive, 15 of them being angiotensin-converting enzyme inhibitors. 相似文献
78.
Shanise Lisie Mello El Halal Elessandra da Rosa Zavareze Annie Campello Telles Ricardo Marques e Silva Márcia de Mello Luvielmo 《Journal Of Aquatic Food Product Technology》2013,22(4):507-517
ABSTRACTProteins have been used extensively because of their relative abundance, nutritional qualities, and film-forming ability with a good structural integrity and mechanical properties. This study investigated the effects of protein isolate and glycerol concentration and pH on the properties of protein films obtained from Whitemouth croaker (Micropogonias furnieri) residues. The films were evaluated for mechanical properties, thickness, water solubility, water vapor permeability (WVP), and morphological properties. The lowest water solubility of the films occurred at low pHs and low glycerol concentrations. The films had high elongation and higher tensile strength when prepared with higher concentrations of protein isolate, lower concentrations of glycerol, and at lower pHs. The WVP and thickness of the films had a low correlation coefficient. The films were rough and had irregular surfaces. These results indicated that protein isolates from fish of low commercial value can be used as a component of new polymeric films for packaging. However, more studies are needed to assess their barrier action against oxygen, thermal behaviors, and their performance in different types of packaging. 相似文献
79.
Brandt's cormorant diet (1994–2012) indicates the importance of fall ocean conditions for northern anchovy in central California 下载免费PDF全文
Meredith L. Elliott Annie E. Schmidt Sara Acosta Russell Bradley Pete Warzybok Keith M. Sakuma John C. Field Jaime Jahncke 《Fisheries Oceanography》2016,25(5):515-528
Effective ecosystem‐based management requires a comprehensive understanding of the functional links in the system. In many marine systems, forage species constitute a critical link between primary production and upper trophic level marine predators. As top predators, seabirds can be indicators of the forage species they consume and the ocean processes that influence these populations. We analyzed the diet and breeding success for the years 1994, 2003, 2005, and 2007–2012 of the Brandt's cormorant (Phalacrocorax penicillatus), a piscivorous diving seabird, breeding in central California, to evaluate the extent to which cormorant diet composition relates to prey availability, and how diet composition relates to breeding success and ocean conditions. Cormorant diet was primarily composed of young‐of‐the‐year (YOY) northern anchovy (Engraulis mordax), YOY rockfish (Sebastes spp.), and several species of small flatfish (order Pleuronectiformes). YOY rockfish consumption was positively related to their abundance as measured in a late spring pelagic midwater trawl survey. Northern anchovy appeared to be the most important prey as its consumption was positively related to cormorant breeding success. More northern anchovy were consumed in years where warm‐water conditions prevailed in the fall season before cormorant breeding. Thus, warm ocean conditions in the fall appear to be an important contributing factor in producing a strong year‐class of northern anchovy in central California and consequently a strong‐year class of Brandt's cormorant on the Farallon Islands. 相似文献
80.