全文获取类型
收费全文 | 112篇 |
免费 | 16篇 |
专业分类
林业 | 2篇 |
农学 | 4篇 |
15篇 | |
综合类 | 4篇 |
农作物 | 3篇 |
水产渔业 | 17篇 |
畜牧兽医 | 70篇 |
园艺 | 1篇 |
植物保护 | 12篇 |
出版年
2023年 | 2篇 |
2022年 | 2篇 |
2021年 | 2篇 |
2020年 | 6篇 |
2019年 | 2篇 |
2018年 | 8篇 |
2017年 | 5篇 |
2016年 | 8篇 |
2015年 | 6篇 |
2014年 | 7篇 |
2013年 | 7篇 |
2012年 | 11篇 |
2011年 | 13篇 |
2010年 | 3篇 |
2009年 | 3篇 |
2008年 | 6篇 |
2007年 | 8篇 |
2006年 | 3篇 |
2005年 | 4篇 |
2004年 | 2篇 |
2003年 | 7篇 |
2002年 | 5篇 |
2001年 | 2篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1995年 | 1篇 |
1990年 | 1篇 |
排序方式: 共有128条查询结果,搜索用时 15 毫秒
91.
Sheila C. Rahal Milton M. Morishin Filho Eduardo Hatschbach Vania Maria V. Machado Karina P. Aptekmann Thaís P. Corrêa 《The Canadian veterinary journal. La revue veterinaire canadienne》2008,49(9):880-884
One male and 1 female, 8-week-old, schnauzer littermates were presented with moderate and mild pectus excavatum, respectively. External application of a coaptation splint to the ventral aspect of the thorax was used for correction of the sternal deformity in the male; conservative treatment was used in the female. 相似文献
92.
Questionnaires were distributed to owners of cats that had undergone limb amputation in the UK, through 1000 veterinary clinics or publications relating to companion cats, or online. Between July 2009 and February 2010, responses were received relating to 234 cats, and data for 204 of these were included in subsequent analyses. The responses received provided data on signalment, aetiology, quality of life, behavioural changes and pain observed in cats after partial or total amputation of a limb. Young male domestic shorthair cats were over-represented in the sample; the most common reason for amputation was a fractured bone, and the hindlimb was almost twice as likely to be amputated as the forelimb. Although 89 per cent of the cats received analgesics/anti-inflammatories after discharge, the owners of 35 per cent of the animals observed some signs of pain during recovery. Eighty-nine per cent of the cats were thought to have regained a 'normal' quality of life as defined by the owner and 94 per cent of the owners stated that they would agree with the decision to amputate the affected limb in a pet if faced with the same decision again. 相似文献
93.
MB Vieira I Bianchi EM Madeira VFB Roll CA Oliveira P Viau I Pivato NC Severo FAB Del Pino A Schneider MN Corrêa 《Reproduction in domestic animals》2010,45(6):1110-1113
This study aimed to evaluate the effect of the exogenous recombinant bovine somatotropin (rbST) on plasma concentrations of insulin‐like growth factor I (IGF‐I), insulin and semen quality of bulls. Twenty bulls (Aberdeen Angus and Brangus) were divided by breed into two groups. Placebo group was injected with NaCl 0.9% (s.c.) and treatment group with rbST (s.c., 500 mg) at days 0 and 14 of the experiment. Immediately after semen collection, blood samples were taken on days 0, 14, 28, 42 and 56 of the experiment. Semen was also collected on day 70 of the experiment. Evaluation of sperm motility was performed at pre‐freezing and post‐thawing stage, whereas assessment of sperm membrane integrity was performed after freezing and thawing. Analysis of data revealed that the effect of treatment and treatment‐by‐collection day on plasma concentrations of IGF‐I and insulin was not significant. However, mean plasma concentrations of IGF‐I and insulin were affected (p < 0.0001) by days of blood sampling. Effect of treatment and treatment‐by‐collection day on motility of spermatozoa was similar (p > 0.05) at pre‐freezing and post‐thawing stage. Intactness of plasmalemma and tail membrane of spermatozoa at post‐thawing stage was higher (p < 0.05) in rbST‐treated group than in control. In conclusion, rbST did not affect plasma concentrations of IGF‐I and insulin, however, it did improve post‐thaw sperm membrane integrity. 相似文献
94.
Becker Aline Minuzzi Cunha Heloisa Pamplona Lindenberg Antônio Corrêa de Andrade Fernanda de Carvalho Tales Boaventura Brunna Cristina Bremer da Silva Edson Luiz 《Plant foods for human nutrition (Dordrecht, Netherlands)》2019,74(4):495-500
Plant Foods for Human Nutrition - The aim of the present study was to evaluate the clinical effects and antioxidant potential of spray-dried yerba mate extract (SDME) capsules in healthy... 相似文献
95.
96.
Semen characteristics of Colossoma macropomum from three successive sample collections in the same reproductive cycle
下载免费PDF全文
![点击此处可从《Aquaculture Research》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Luana Barbosa Pires Eduardo Antonio Sanches Elizabeth Romagosa Ruy Alberto Caetano Corrêa Filho Danilo Pedro Streit Junior Rosiane Araujo Rodrigues Nass Jayme Aparecido Povh 《Aquaculture Research》2017,48(9):5104-5110
The objective of this work was to evaluate the semen characteristics of C. macropomum fish from three successive semen sample collections taken during the same reproductive cycle. Six breeders (6.4 ± 1.5 kg) induced with crude carp pituitary extract (2.5 mg kg?1) were used. Samples of semen were collected in graduated syringes after a period of 260 degree‐hours. The semen was collected from the same males in September 2014 (sample 1), December 2014 (64 days after the first collection – sample 2) and February 2015 (86 days after the second collection – sample 3). The semen volume was higher (P < 0.05) in the sample 1 (6.7 mL) and sample 2 (3.4 mL) than in the sample 3 (1.0 mL). Sperm concentration and normal sperm did not significantly differ between samples. Likewise, sperm motility, curvilinear velocity, displacement velocity, oscillation and beat cross frequency did not vary, whereas straight‐line velocity, straightness and progression were higher (P < 0.05) in sample 2 (December). In general, despite lower amounts, the semen appeared to be of good quality for all three samples collected during the same reproductive period. 相似文献
97.
Genetic mapping for resistance to gray leaf spot in maize 总被引:1,自引:0,他引:1
Fernando Cesar Juliatti Michelle Gonçalves Pedrosa Heyder Diniz Silva Junia Vianna Corrêa da Silva 《Euphytica》2009,169(2):227-238
The molecular marker technology has been used on mapping of quantitative trait loci (QTLs) associated with plant resistance.
The objectives of this research were to estimate genetic parameters and to map genomic regions involved in the resistance
to gray leaf spot in maize. Ninety F3 families from the BS03 (susceptible) and BS04 (resistant) cross were used. Field trials were performed using a 10 × 10 square
lattice design with three replications. Data from 62 SSR markers were used for linkage analysis. The locations of the QTLs
on the linkage groups were determined by composite interval mapping method and the phenotypic variance explained by each marker
was determined by regression analysis. Several QTLs associated to disease resistance were identified in the population BS03 × BS04.
Some QTLs showed significant effects over the different environments studied. The existence of significant QTLs in common
among different environments indicates these genomic regions as possible new tools for marker-assisted selection in maize
breeding programs. 相似文献
98.
Bruno Corrêa da Silva José Luiz Pedreira Mouriño Felipe Nascimento Vieira Adolfo Jatobá Walter Quadros Seiffert Mauricio Laterça Martins 《Aquaculture Research》2012,43(6):908-916
Intensive culture of the hybrid surubim (Pseudoplatystoma corruscans × Pseudoplatystoma fasciatum) in Brazil is responsible for the occurrence of diseases and consequent economic losses. However, the causative agents are not well known. The objective of this study was to isolate and to characterize the pathogenic agent responsible for mortalities in cultured surubim and to demonstrate its virulence. Ten fish from a fish farm located in the Mato Grosso do Sul State (Brazil) were collected and 14 haemolytic bacteria characterized as Aeromonas hydrophila were isolated from the kidneys (eight) and brain (six). As an experimental challenge, fish weighing 98.1±23.6 g were injected with 1 mL of saline solution and 2 × 102, 2 × 104, 2 × 106 and 2 × 108 CFU A. hydrophila mL?1. Fish infected with 2 × 108 CFU showed increased external and internal symptoms and mortality of 50±12.5% after 96 h. Increased A. hydrophila concentration was responsible for a decrease in haematocrit percentage and erythrocyte number, lymphocytes and eosinophils, as well as an increase in monocytes, neutrophils, serum agglutination titre and serum antimicrobial activity. It was concluded that A. hydrophila was responsible for characteristic symptoms of bacterial haemorrhagic septicaemia as well as important haematological and immunological alterations, which led to surubim mortality. 相似文献
99.
Survival of White Spot Syndrome Virus–Infected Litopenaeus vannamei Fed with Ethanol Extract of Uncaria Tomentosa
下载免费PDF全文
![点击此处可从《Journal of the World Aquaculture Society》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Osmar Tomazelli Júnior Fernanda Kuhn Paulo José Mendonça Padilha Luiz R. Mota Vicente Sergio Winckler da Costa Bruno Corrêa da Silva Delano Dias Schleder Cristiano Nunes Nesi Jacir Dal Magro Sílvia de Lamo‐Castellví 《Journal of the World Aquaculture Society》2018,49(1):165-174
With the present project, the phytochemical composition of Uncaria tomentosa cultivated in Chapecó (Brazil) was analyzed and then the potential of using this local plant extract to protect by oral feeding virus‐infected Litopenaeus vannamei shrimp was also investigated. For this study, five treatments were tested: uninfected shrimp fed with pelleted feed (TC), WSSV‐infected shrimp fed with pelleted feed (T1), infected shrimp fed with pelleted feed with 1% ethanol extract of U. tomentosa (EEUT) (T2), infected shrimp fed with pelleted feed with 2% EEUT (T3), and infected shrimp fed pelleted feed with 4% EEUT (T4). The chemical analysis of EEUT showed the presence of alkaloids, flavonoids, sterols, terpenes, coumarins, and tannins and also a high in vitro free radical‐scavenging activity as well as high total phenolic content. Shrimp fed with 2 and 4% EEUT (T3 and T4) showed a survival probability significantly higher than T1 and T2 treatments and no clinical symptoms of WSSV infection. Immunological assay also showed a positive phenoloxidase activity effect on shrimp fed with EEUT. 相似文献
100.
Kipper M Da Silva AS Oliveira CB Andretta I Paim FC da Silva CB Leon R Corrêa K Stainki DR Lopes ST Monteiro SG 《Research in veterinary science》2011,91(2):240-242
Trypanosoma evansi infections in domestic animals are characterized by anemia and thrombocytopenia. The cause of the platelets decrease is unknown, but researchers suggest that thrombocytopenia may result from damage of the bone marrow, reduced survival of platelets, auto-immune thrombocytopenia, disseminated intravascular coagulation and splenic sequestration. Some of these causes have already been tested by our research group and found to be unrelated. Therefore, this study has the objective of testing the hypothesis that splenic sequestration might be responsible for thrombocytopenia in T. evansi-infected rats. A total of 28 rats assigned to four groups were used in the experiment. Group A rats were splenectomized and infected with T. evansi, group B rats were infected with T. evansi, group C rats were splenectomized, but not infected and group D rats were normal controls. Five days post-infection all rats were anesthetized and blood was collected in order to measure the number of circulating platelets, fibrinogen levels, prothrombin time (PT) and activated partial thromboplastin time (aPTT). The spleens of groups B and D were weighed at necropsy. The infected animals (groups A and B) showed a significant reduction in platelets and increased PT and aPTT when compared to negative control groups (groups C and D). Animals from group A showed increased levels of fibrinogen. The mean weight of spleen differed between group B (2.62 g) and group D (0.55 g). It was concluded that there is no relationship between thrombocytopenia and splenic sequestration in infection by T. evansi. 相似文献