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排序方式: 共有121条查询结果,搜索用时 15 毫秒
71.
Beata Irena Cejko Sławomir Krejszeff Sylwia Judycka Beata Sarosiek Mariola Dietrich Dariusz Kucharczyk Radosław Kajetan Kowalski 《Aquaculture International》2014,22(1):111-122
Changes in semen quality and selected biochemical markers were analyzed during a week of spawning season of common carp Cyprinus carpio L. Semen was obtained twice, on May 30 and on June 7, and each time it was collected 24 h after hormonal stimulation using Ovopel [(d-Ala6, Pro9 NEt)-mGnRH + metoclopramide] in 1 pellet kg?1. The total volume of semen (ml), volume of semen per kg of body weight (ml kg?1 b.w.), sperm concentration (×109 ml?1), total number of sperm per kg of body weight (×109 kg?1 b.w.), pH of semen, pH of seminal plasma, seminal plasma osmotic pressure (mOsm kg?1) and the total protein content in seminal plasma (mg ml?1) were determined. A 10 mM Tris buffer containing 100 mM NaCl with 0.5 % BSA (pH 9.0, osmolality 200 mOsm kg?1) was used to activate sperm. The following computer-assisted sperm analysis (CASA) parameters were determined: percentage of motile sperm (MOT, %), progressively motile sperm (PRG, %), curvilinear velocity (VCL, μm s?1), straight-line velocity (VSL, μm s?1), movement linearity (LIN, %), wobbling index (WOB, %), amplitude of lateral head displacement (ALH, μm) and beat cross-frequency (BCF, Hz). The volume of semen per kg of BW, total number of sperm per kg of BW and semen pH were significantly lower at the second semen sampling compared to the first semen sampling. Volume of semen at the second sampling correlated positively with CASA parameters. A lack of differences among CASA parameters between both collection periods indicates good quality of carp sperm hormonally stimulated with Ovopel twice at a 1-week interval. 相似文献
72.
Irena Atanassova Biser Hristov Toma Shishkov Stefan Doerr 《Archives of Agronomy and Soil Science》2017,63(12):1697-1710
The present study describes signature lipid biomarkers in reclaimed mine soils (RMSs), an unreclaimed spoil and a natural soil (Vertisol) for a major coal mine basin in Eastern Europe. Alkanes, fatty acids and fatty alcohols, as well as coal biomarkers were abundant in the mine soils and the unreclaimed spoil. The alkanes distribution in the RMSs was bimodal with maxima at C18 and C29/C31 and points at two origins for the alkanes, terrigenous plants, including soil borne and from the coal source. Fatty acid carbon preference indices (CPIeven/odd = 10.4 and 8.1 for the mine soils under pine and grass vegetation) reflect the increasing role of terrestrial vegetation in the formation of organic matter. The higher concentrations of the long-chain alkanes, fatty acids and alcohols are speculated as the reason for the severe and extreme water repellency observed with the Vertisol and the unreclaimed spoil. The presence of terrigenous steroid and triterpenoid markers in the RMSs is an indication of the ongoing soil formation processes. The analysis of lipid extracts allowed for the assessment of sensitive molecular indicators of biogenic terrigenous and coal origin and the degree of soil recovery following >20 years of spoils reclamation. 相似文献
73.
Liberati-Čizmek Ana-Marija Biluš Mirna Brkić Antun Lovro Barić Irena Colić Bakula Miro Hozić Amela Cindrić Mario 《Plant foods for human nutrition (Dordrecht, Netherlands)》2019,74(2):235-240
Plant Foods for Human Nutrition - Metabolic syndrome, characterized by obesity, low-grade inflammation, insulin resistance, hyperglycemia, dyslipidemia and hypertension, is a major risk factor for... 相似文献
74.
75.
The effects of treatments with 2,4-dichloro-phenoxy-acetic-acid (2,4-D), 2.5 mg l?1, on the 4 different flower types in 3 eggplant cultivars with different flowering patterns were investigated. Varietal responses in fruit set were recorded, but fruit weight was increased considerably in all cultivars treated. Stylar heteromorphism affected fruit set more than did the position of the flower in the cluster. Changes in seed development, induced by environmental factors or by the 2,4-D treatments, were recorded and their relations to fruit development evaluated. 相似文献
76.
Trials were carried out on sweet pepper, Capricum annuum L. cultivar ‘Ma'or’ under controlled temperature conditions and natural light. In the first trial, we examined night temperatures of 15, 18, 21 and 24°C (± 1) in combination with a day temperature of 24°C, and in the second trial day temperatures of 22, 25 and 28°C (12 hours) and divided day temperatures of 28-32-28°C (4+4+4 hours) in combination with a night temperature of 18°C. The highest fruit-set was obtained at the lowest night temperature; the highest night temperature caused considerable blossom drop. The highest tested day temperature did not cause increased blossom drop. 相似文献
77.
Wehmann E Ujvári D Mazija H Velhner M Ciglar-Grozdanić I Savić V Jermolenko G Cac Z Prukner-Radovcić E Lomniczi B 《Veterinary microbiology》2003,94(4):269-281
Newcastle disease (ND) epizootics in some European countries after the World War II were caused by ND virus (NDV) of multiple genotypes (IV-VIIa) occurring sequentially and/or simultaneously. This study was carried out to characterise the genetic composition of NDV strains during the outbreaks in the territory of the former Yugoslavia in order to enhance our understanding of the relationships of past epizootics in Europe. Sixty-eight NDV strains isolated between 1979 and 2002 were analysed by restriction enzyme digestion and partial sequencing of the fusion protein gene. All isolates were placed in genotype V, an exotic type, that was introduced to western Europe in 1970. Residue substitution analysis has allowed the recognition of four genetic variants, Vb1-Vb4, and the tracing of their movements. Vb1, a dominant variant in Bulgaria from the late 1970s, was also wide spread in the former Yugoslavia throughout the period under investigation. Vb2, a variant occurring in the neighbouring countries in the early 1970s could be the founder of the epidemic in Yugoslavia and it was present up to the late 1980s. Variants Vb3 and Vb4 could be found only after 1987. In conclusion, the ND outbreaks in Yugoslavia were part of the epizootic wave due to genotype V viruses that started in western Europe in 1970 and became endemic in the region. Inter-country transmission occurred for all variants, and Vb3 and Vb4 might have evolved during the endemic period. 相似文献
78.
Koláčková Tereza Kolofiková Kateřina Sytařová Irena Snopek Lukáš Sumczynski Daniela Orsavová Jana 《Plant foods for human nutrition (Dordrecht, Netherlands)》2020,75(1):48-53
Plant Foods for Human Nutrition - Matcha was analysed for its chemical composition, fibre, vitamin C, caffeine and chlorophyll contents. Flavonoids and phenolics, phenolic profiles and antioxidant... 相似文献
79.
Cerkvenik-Flajs V Grabnar I Kozuh Erzen N Marc I Antonić J Vergles-Rataj A Kuzner J Pogacnik M 《Journal of agricultural and food chemistry》2007,55(23):9733-9738
Abamectin (ABM) has been used worldwide as an anthelmintic drug in veterinary medicine and as an agricultural pesticide. Its pharmacokinetics and permeation into milk was evaluated in dairy sheep after subcutaneous administration. ABM elimination half-lives and mean residence times were 1.7 and 3.7 days for blood plasma and 1.9 and 3.8 days for milk, respectively. The ABM milk to plasma concentration ratio (0.89) primarily depends on milk fat content. Transfer of ABM residues to suckling lambs was evaluated by determination of ABM concentration time courses in lambs' plasma. Mean maximal concentration in lambs was 1.6 microg L(-1) at 3.3 days, and elimination half-life was 2.7 days. In ewes' plasma and milk, ABM was detected up to 23 days. Because of different pharmacokinetics, ABM exposure in lambs was almost 10% of the exposure in ewes, although the amount excreted in milk was only 1.0% of the dose. 相似文献
80.
Valentová K Lebeda A Dolezalová I Jirovský D Simonovska B Vovk I Kosina P Gasmanová N Dziechciarková M Ulrichová J 《Journal of agricultural and food chemistry》2006,54(4):1347-1352
This paper focuses on the biological and chemical variability of four yacon (Smallanthus sonchifolius) accessions cultivated under field conditions. Significant variations in tuber shape, weight, content of oligofructans, as well as in leaf isozymes, phenolics, and relative DNA contents were found. Accessions 6 and 88 were the most productive (up to 3.01 and 3.74 kg/plant); accession 48 was the most balanced from the yield aspect in three vegetative periods. A significantly higher content of beta-(2-->1) oligofructans was noted in accessions 48 and 88 as compared to 6 and 60. No difference in sucrose, glucose, and fructose level was observed. Only accession 6 exhibited separate acid phosphatase and esterase isoforms. Accessions 6 and 60 had the highest content of phenolics, and accession 88 had the lowest relative DNA content. Large yacon intraspecific variation may be useful in future detailed research as a good background for breeding, growing, and utilization in industrial processing. 相似文献