全文获取类型
收费全文 | 213篇 |
免费 | 27篇 |
专业分类
林业 | 8篇 |
农学 | 8篇 |
基础科学 | 1篇 |
30篇 | |
综合类 | 6篇 |
农作物 | 9篇 |
水产渔业 | 13篇 |
畜牧兽医 | 148篇 |
园艺 | 3篇 |
植物保护 | 14篇 |
出版年
2023年 | 3篇 |
2022年 | 5篇 |
2021年 | 7篇 |
2020年 | 10篇 |
2019年 | 11篇 |
2018年 | 11篇 |
2017年 | 14篇 |
2016年 | 12篇 |
2015年 | 7篇 |
2014年 | 11篇 |
2013年 | 17篇 |
2012年 | 22篇 |
2011年 | 11篇 |
2010年 | 16篇 |
2009年 | 7篇 |
2008年 | 12篇 |
2007年 | 8篇 |
2006年 | 11篇 |
2005年 | 4篇 |
2004年 | 4篇 |
2003年 | 9篇 |
2002年 | 4篇 |
2001年 | 5篇 |
1999年 | 2篇 |
1998年 | 6篇 |
1997年 | 4篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1983年 | 1篇 |
排序方式: 共有240条查询结果,搜索用时 15 毫秒
231.
MD Quetglas PR Adona THC De Bem PRL Pires CLV Leal 《Reproduction in domestic animals》2010,45(6):1074-1081
232.
Two Methods of Vitrification Followed by In Vitro Culture of the Ovine Ovary: Evaluation of the Follicular Development and Ovarian Extracellular Matrix 下载免费PDF全文
FT Bandeira AA Carvalho SV Castro LF Lima DA Viana JSAM Evangelista MJS Pereira CC Campello JR Figueiredo APR Rodrigues 《Reproduction in domestic animals》2015,50(2):177-185
The aim of this study was to evaluate the influence of two vitrification techniques on the extra cellular matrix (ECM) and ovarian follicular development. The ovarian cortex was fragmented (9 mm3) and divided into six groups, viz. fresh control, cultured control, vitrified by the Ovarian Tissue Cryosystem (OTC) method, conventional solid surface vitrification (SSV) method, OTC/cultured and SSV/cultured. Follicles from all the fragments were analysed for morphology, development and viability. The ECM was evaluated based on the condition of collagen and reticular fibres and the immunolocalization of type I collagen and fibronectin. After 7 days of culture, the tissue vitrified by OTC revealed a higher percentage (p < 0.05) of morphologically normal (30.66%) and viable (60.00%) follicles when compared with those vitrified using the SSV technique (21.33% and 23.00%). In all the fragments cultured, regardless of the vitrification method, a significantly higher percentage of developing follicles was observed when compared with the non‐cultured tissue. Analysis of the type I collagen showed increased immunostaining after the in vitro culture in the vitrified fragments. In conclusion, the OTC is better for preserving the follicular viability and morphology and maintaining the integrity of the extracellular matrix components of the ovine ovary. 相似文献
233.
RJ DOBSON RB BESIER EH BARNES SCJ LOVE K BELL LF Le JAMBRE 《Australian veterinary journal》2002,80(7):438-438
234.
235.
236.
Ronaldo Carvalho Santos José Luiz Pires Ronan Xavier Correa 《Genetic Resources and Crop Evolution》2012,59(3):327-345
Morphological variability of four wild species, one semi-cultivated and one cultivated species of Theobroma L., indigenous to Brazil and introduced in the Bahian cocoa-growing region, was characterized based on 35 quantitative and
13 qualitative traits. T. cacao, which shows a great diversity of conserved germplasm and many published references for morphological characterization, besides
of being one of the most cultivated species in Theobroma, was used for comparison as reference species. Sample size was defined for each organ evaluated and individual data set related
to leaf, flower, fruit and seed analyzed by a multivariate approach. The studied species showed a large variation for all
morphological traits evaluated. T. grandiflorum (Willd. ex Spreng.) Schum. and T. bicolor Humb. et Bonpl. showed the highest means for quantitative variables but were very divergent from each other considering flower
and qualitative traits. These were the only species that presented similar number of seeds in comparison with T. cacao. A species with smaller means for most traits was T. obovatum Klotzsch ex Bernoulli. The four wild species show white seeds while T. cacao shows purple ones. Multivariate analysis of variance indicates significant differences between Theobroma species for individual or grouped morphological fruit traits. The results from a cluster analysis were, in a general way,
congruent with botanical classification. The statistical analysis performed here was useful to identify a great variability
among evaluated traits and to distinguish the most divergent variables from Theobroma species. This work provided an important contribution to morphological characterization of polymorphic traits from different
organs of Theobroma species, which can help breeders in the future on the direction of interspecific crosses attempts. 相似文献
237.
de Jesús Pires Carolline Costa Marcones Ferreira Zucchi Maria Imaculada Ferreira-Gomes Regina Lucia Pinheiro José Baldin Viana João Paulo Gomes Bajay Miklos Maximiliano Assunção-Filho José Ribamar de Almeida Lopes Ângela Celis 《Genetic Resources and Crop Evolution》2022,69(3):973-986
Genetic Resources and Crop Evolution - Lima bean (Phaseolus lunatus L.) have high genetic diversity, especially in Brazil, which has been maintained both on farms and in germplasm banks. Knowledge... 相似文献
238.
Breno Cayeiro Cruz Weslen Fabricio Pires TeixeiraWillian Giquelin Maciel Gustavo FelippelliFlávia Carolina Fávero André Cayeiro CruzCarolina Buzzulini Vando Edésio SoaresLucas Vinicius Costa Gomes Welber Daniel Zanetti LopesGilson Pereira de Oliveira Alvimar José da Costa 《Research in veterinary science》2014
The current study assessed the deleterious effects of two formulations of fluazuron (2.5 mg/kg fluazuron and a combination of 3.0 mg/kg fluazuron + 0.5 mg/kg abamectin) on the reproductive parameters of engorged Rhipicephalus (Boophilus) microplus females that naturally detached from experimentally infested cattle in two experiments. Based on the obtained results, it can be concluded that fluazuron (2.5 mg/kg) showed deleterious effects only on the hatchability percentage in the period of 2–7 post-treatment days of this ectoparasite's engorged females. On the other hand, the fluazuron (3.0 mg/kg) + abamectin (0.5 mg/kg) combination presented harmful effects over reproductive parameters of this tick species. Further studies should be performed with a known tick population (reference susceptible strain) to determine the effect of these formulations on the reproductive parameters and to elucidate if this field population is fluazuron resistant. 相似文献
239.
R Payan‐Carreira AL Saraiva T Santos H Vilhena A Sousa C Santos MA Pires 《Reproduction in domestic animals》2013,48(5):e70-e77
Uterine neoplasms of epithelial origin are rare in cats and most often are described in older females. Yet, in less than 2 years, four ovariohysterectomy specimens were submitted from different practices to the Laboratory of Histology and Anatomical Pathology, at UTAD (Vila Real, Portugal), that emitted a diagnosis of feline endometrial adenocarcinoma. Untypically, all the females were aged <1 year old at the surgery. Access to the clinical files was requested to document the clinical features of the four cases, including any complementary data available, to construct the present case reports. The clinical situation developed with discrete signs, but vulvar discharge was present in three cases, ranging from bloody to brownish or colourless, and from purulent to mucous. The females were in dioestrus, although the oestrus remained unperceived in most cases. In this study, the four clinical situations are described and discussed on the basis of available literature, highlighting the aspects that may impair an early diagnosis and that may favour the progression of the disease and also that age should not be an excluding criteria when analysing the differential diagnosis list. 相似文献
240.
Frederico Patrus Ananias de Assis Pires Thierry Ribeiro Tomich Luiz Gustavo Ribeiro Pereira Fernanda Samarini Machado Mariana Magalhães Campos Alan Figueiredo de Oliveira Guilherme Lobato Menezes Rafael Araújo de Menezes Pamella Grossi de Sousa Diogo Gonzaga Jayme Lúcio Carlos Gonçalves 《Grass and Forage Science》2023,78(1):224-235
This study aimed to evaluate the silage quality, ingestive behaviour, and sheep energy partition fed corn and sorghum silages, with or without inoculation with Lactiplantibacillus plantarum and Lentilactobacillus buchneri. Whole plants of one dent corn hybrid (DCS), one flint corn hybrid (FCS), and one forage sorghum hybrid (SS) were ensiled with or without an inoculant containing L. plantarum and L. buchneri (4 × 105 CFU g−1), totalling six treatments (3 × 2 factorial scheme). The treatments were ensiled in metal drums with 200 L capacity. The lactic acid concentrations in the inoculated FCS and DCS were higher by 13.4% and 12.8%, respectively, than those in the non-inoculated plants. In contrast, the lactic acid concentration in the inoculated SS was 23.1% lower than that in the non-inoculated SS. Furthermore, there were differences in pH and acetic acid concentrations only in SS, which were 2.3% and 45.2% higher, respectively, in inoculated silage than in non-inoculated silage. In inoculated DCS and SS, propionic acid concentrations were 1.7 times higher (for both silages), and 1-propanol was 3.7 and 1.8 times higher compared than those in non-inoculated silages. There was a main effect of the inoculant on 1,2-propanediol concentrations, which were 37.5% higher in inoculated silages than in non-inoculated silages. However, ingestive behaviour, heat and methane production, and silage net energy concentrations were not affected by inoculant use. Fermentative modifications caused by inoculation with L. plantarum and L. buchneri in whole plant corn or sorghum silage did not modify sheep energy partition. 相似文献