全文获取类型
收费全文 | 65篇 |
免费 | 2篇 |
专业分类
林业 | 1篇 |
农学 | 1篇 |
11篇 | |
综合类 | 3篇 |
农作物 | 3篇 |
水产渔业 | 3篇 |
畜牧兽医 | 30篇 |
园艺 | 2篇 |
植物保护 | 13篇 |
出版年
2022年 | 2篇 |
2021年 | 4篇 |
2020年 | 1篇 |
2019年 | 3篇 |
2018年 | 1篇 |
2016年 | 2篇 |
2015年 | 2篇 |
2014年 | 2篇 |
2013年 | 12篇 |
2012年 | 6篇 |
2011年 | 3篇 |
2010年 | 2篇 |
2009年 | 2篇 |
2008年 | 3篇 |
2007年 | 3篇 |
2006年 | 1篇 |
2005年 | 1篇 |
2004年 | 2篇 |
1994年 | 2篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1985年 | 3篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1977年 | 1篇 |
排序方式: 共有67条查询结果,搜索用时 15 毫秒
51.
Pawel Rydelek 《Journal of plant nutrition》2013,36(6):911-928
The main constituents of peat include floral remains (in a various degree of humification), peat humus, and mineral constituents of biotic and non-biotic origin. The organic content is considered to be the main parameter that decides about physical and chemical properties of peat. However, the content and composition of mineral constituents of silted (high-ash) peats may cause differences in chemical and physical properties in comparison to the unsilted (low-ash) peats. Therefore, the identification of mineral content, as well as chemical and mineral composition of inorganic constituents, is essential to predict the properties of silted peats. The aim of this study is to determine the content, composition and the origin of mineral constituents of three fens from the Lubartów Plateau (Eastern Poland). 相似文献
52.
Taylor VANDUZER Raj DUGGAVATHI Maciej MURAWSKI Dorota A. ZIEBA Patrycja SROKA Pawel M. BARTLEWSKI 《The Journal of reproduction and development》2014,60(6):476-482
Nineteen cycling ewes underwent transrectal ultrasonography of ovaries followed by ovariectomies during the growth phase of the first follicular wave of the interovulatory interval or the proestrus/estrus phase of the cycle. Quantitative ultrasonographic characteristics of the antrum and follicular wall in a total of forty-three ovine antral follicles were examined for correlations with the protein expression of three steroidogenic enzymes (cytochrome P450 17α-hydroxylase, CYP17; cytochrome P450 aromatase, CYP19; and 3β-hydroxysteroid dehydrogenase, 3β-HSD) determined by densitometric analysis of immunohistochemical slides, follicular dimensions, granulosa layer thickness and the percentage of apoptotic granulosa cells. Significant correlations were found between echotextural attributes of ovine antral follicles and the percentage of apoptotic granulosa cells, CYP17 expression (theca), CYP19 expression (granulosa) and 3β-HSD expression (theca cells). Computer-aided
analyses of ultrasonographic images can be beneficial to the development of assisted reproductive technologies and diagnosis of hormonal imbalances without the need for ovarian biopsies or hormone assays. 相似文献
53.
Katharina Bratz Roland Bücker Greta Gölz Silke S. Zakrzewski Pawel Janczyk Karsten Nöckler Thomas Alter 《Veterinary microbiology》2013
Campylobacter (C.) is one of the most common food-borne pathogen causing bacterial enteric infections in humans. Consumption of meat and meat products that have been contaminated with Campylobacter are the major source of infection. Pigs are a natural reservoir of Campylobacter spp. with C. coli as the dominant species. Even though some studies focussed on transmission of C. coli in pig herds and the excretion in faeces, little is known about the colonisation and excretion dynamics of C. coli in a complex gut microbiota present in weaned piglets and the translocation to different tissues. 相似文献
54.
Phosphonic analogues of morphactins. Part V: Peptides containing 9-aminofluoren-9-ylphosphine oxides
Pawel Kafarski Barbara Lejczak Roman Gancarz Elbieta Jaskulska Przemyslaw Mastalerz Jan Sylwester Wieczorek Iwona Zbyryt 《Pest management science》1985,16(3):239-243
Di- and tripeptides containing P-terminal 9-aminofluoren-9-ylphosphine oxides were synthesised and evaluated for herbicidal activity using Spirodela oligorriza (Kurz.) Hegelm. The glycylglycyl and threonyl peptides showed high activity as measured by the reduction of dry matter. 相似文献
55.
Piotr Wieczorek Barbara Lejczak Malgorzata Kaczanowska Pawel Kafarski 《Pest management science》1990,30(1):43-57
Phosphono peptides exhibited plant-growth-regulating activity when tested on Lepidium sativum and Cucumis sativus. The studies have provided evidence that the mechanism of action of these compounds may involve the uptake of the phosphono peptides into the plant, intracellular hydrolysis of the peptide bond and release of the P-terminal aminoalkylphosphonic acid. This acid or its metabolite is then probably responsible for the observed physiological effect. 相似文献
56.
Chromosome preparations and assay of the microsatellite locus Afu‐68 were used to determine ploidy in Siberian sturgeon (Acipenser baeri Brandt) and F1 hybrids of Siberian sturgeon and Russian sturgeon (Acipenser gueldenstaedti Brandt). The chromosome number and microsatellite locus Afu‐68 were compared and these analyses were used for identification of ‘haploid’, ‘diploid’ and ‘triploid’ progeny of the studied cross of A. baeri× (A. baeri×A. gueldenstaedti). 相似文献
57.
Ten microsatellite loci were tested on Mendelian segregation in the bester – hybrid of beluga, Huso huso L. and sterlet, Acipenser ruthenus L. in the fourth generation. All studied loci showed disomic inheritance and Mendelian segregation of their alleles. The molecular approach by microsatellite DNA analysis represents a reliable tool for interspecific characterization of sturgeons and their hybrids (different alleles of several loci are present in sturgeon fishes, and interspecific hybrids posesses both maternal and paternal specific alleles). This is the first report of the Mendelian segregation testing in interspecific hybrid of acipenserid fishes using microsatellite DNA markers. 相似文献
58.
Piotr Kupczyk Marta Rykala Pawel Serek Aleksandra Pawlak Bartosz Slowikowski Marcin Holysz Grzegorz Chodaczek Jan P. Madej Piotr Ziolkowski Artur Niedzwiedz 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2022,36(4):1508
BackgroundThe endocannabinoid system (ECS) is composed of cannabinoid receptors type 1 (CBR1) and type 2 (CBR2), cannabinoid‐based ligands (endogenous chemically synthesized phytocannabinoids), and endogenous enzymes controlling their concentrations. Cannabinoid receptors (CBRs) have been identified in invertebrates and in almost all vertebrate species in the central and peripheral nervous system as well as in immune cells, where they control neuroimmune homeostasis. In humans, rodents, dogs, and cats, CBRs expression has been confirmed in the skin, and their expression and tissue distribution become disordered in pathological conditions. Cannabinoid receptors may be a possible therapeutic target in skin diseases.ObjectivesTo characterize the distribution and cellular expression of CBRs in the skin of horses under normal conditions.AnimalsFifteen healthy horses.MethodsUsing full‐thickness skin punch biopsy samples, skin‐derived primary epidermal keratinocytes and dermal‐derived cells, we performed analysis of Cnr1 and Cnr2 genes using real‐time PCR and CBR1 and CBR2 protein expression by confocal microscopy and Western blotting.ResultsNormal equine skin, including equine epidermal keratinocytes and dermal fibroblast‐like cells, all exhibited constant gene and protein expression of CBRs.Conclusions and Clinical ImportanceOur results represent a starting point for developing and translating new veterinary medicine‐based pharmacotherapies using ECS as a possible target. 相似文献
59.
The study was performed to investigate and to describe features of gross and microscopic morphology of craniocervical junction (CCJ) in dogs. Seventy mature dogs (38 females, 32 males) of different body weight, representing small, medium and large breeds of dolicho-, mesati-, and brachycephalic morphotype were dissected. Morphological details were localised using an operating microscope with integrated video channel. Occurrence and distribution of fibrocartilage in the ligaments from 10 dogs was analysed histologically. Three new pairs of ligaments were described and named: dorsal ligaments of atlas, cranial internal collateral ligaments of atlas, and caudal internal collateral ligaments of atlas. Several new findings in the course of the known ligaments were found relating to breed and body weight. For the first time enthesis fibrocartilage was identified in ligaments of CCJ in dogs. Sesamoidal fibrocartilage was identified in the transversal ligament of atlas in large dogs. The findings are discussed for clinical importance. 相似文献
60.
Gwida M Neubauer H Ilhan Z Schmoock G Melzer F Nöckler K Janczyk P Tomaso H Rösler U Al Dahouk S 《Comparative immunology, microbiology and infectious diseases》2012,35(2):181-185
To assess the general impact of endemic countries on the re-emergence of brucellosis in non-endemic regions of the European Union, the genetic fingerprints of Brucella melitensis strains imported to Germany were compared to ovine strains from Turkey in a molecular epidemiological study. Genotyping of 66 Brucella strains (based on Multiple Locus of Variable number of tandem repeats Analysis) isolated from German travellers and Turkish immigrants living in Germany revealed epidemiological concordance with 20 sheep isolates originating from Eastern Anatolia, Turkey. In summary, cross-border molecular tracing confirmed brucellosis being a zoonosis of concern for European public health. 相似文献