全文获取类型
收费全文 | 60篇 |
免费 | 1篇 |
专业分类
林业 | 11篇 |
农学 | 1篇 |
14篇 | |
综合类 | 5篇 |
农作物 | 2篇 |
水产渔业 | 2篇 |
畜牧兽医 | 20篇 |
园艺 | 1篇 |
植物保护 | 5篇 |
出版年
2021年 | 1篇 |
2020年 | 1篇 |
2019年 | 5篇 |
2018年 | 4篇 |
2017年 | 1篇 |
2016年 | 2篇 |
2015年 | 4篇 |
2014年 | 1篇 |
2013年 | 6篇 |
2012年 | 5篇 |
2011年 | 6篇 |
2010年 | 1篇 |
2009年 | 2篇 |
2008年 | 4篇 |
2007年 | 3篇 |
2006年 | 2篇 |
2005年 | 3篇 |
2004年 | 2篇 |
2003年 | 1篇 |
2002年 | 2篇 |
2001年 | 1篇 |
1981年 | 1篇 |
1976年 | 2篇 |
1968年 | 1篇 |
排序方式: 共有61条查询结果,搜索用时 0 毫秒
31.
Zdanowicz Marta Mudryk Zbigniew Jan Perliński Piotr 《Veterinary research communications》2020,44(1):9-18
Veterinary Research Communications - Abundance and antibiotic resistance of bacteria of the genus Aeromonas isolated from the water of three carp ponds were studied. The number of those bacteria... 相似文献
32.
Niczyporuk JS Samorek-Salamonowicz E Kozdruń W Mizak Z 《Acta veterinaria Hungarica》2011,59(3):405-408
The aim of the study was to attempt the detection of West Nile virus (WNV) in wild birds in Poland. Forty-eight species of 1912 wild birds were used for the investigations. The birds were derived from various locations in Poland from early spring till late autumn of the years 2009-2011. The brain samples were homogenised and cellular RNA was isolated. Two methods (RT-PCR and nested RT-PCR) were used. The presence of WNV RNA was not detected in the samples examined. Additionally, a short analysis of the epizootiological situation regarding the presence of WNV in Poland is presented. 相似文献
33.
Jolanta Floryszak-Wieczorek Zbigniew Górski Magdalena Arasimowicz-Jelonek 《European journal of plant pathology / European Foundation for Plant Pathology》2011,130(2):249-258
Each living cell of a plant produces photons in certain conditions. Under normal physiological conditions, cell photon emission
is stationary and minimal. Disturbance in the oxidative homeostasis by biotic stress is manifested by increased ‘biophoton’
production. Such biophoton responses of plants may be used as an integral indicator of the degree of oxidative homeostasis
misbalance. Our results demonstrate that biophoton generation has been much higher in a resistant potato variety than in a
susceptible one till 10 h after Phytophthora infestans inoculation. In contrast, ultra-weak luminescence from detached susceptible potato and moderately resistant pelargonium leaves
increased from 1–4 to 4–5 days after inoculation with Phytophthora infestans or Botrytis cinerea, respectively. Pre-treatment of susceptible potato leaves with a defence inducer, arachidonic acid, resulted in a transient
burst of light in response to P. infestans lasting for 30–45 h post inoculation (hpi). This study presents the potential adaptation of functional imaging of ultra-weak
luminescence to monitor time-dependent free radical processes during disease development and its application to draw conclusions
on plant resistance to pathogens of different lifestyle. Moreover, it has been shown that imaging of temporal biophoton generation
from potato leaves treated with arachidonic acid might be a helpful marker in mapping oxidative changes leading to systemic
acquired resistance (SAR). 相似文献
34.
Robert Klewicki Dorota Konopacka Małgorzata Uczciwek Zbigniew Irzyniec Ewelina Piasecka Catherine Bonazzi 《The Journal of Horticultural Science and Biotechnology》2013,88(6):75-79
SummaryThe aim of our work was to measure sorption isotherms on freeze-dried and convectively-dried fruits (apple cv. Idared; sour cherry cv. English Morello; blackcurrant cv. Tiben), previously osmotically dehydrated in fructo-oligosaccharide solution, or concentrated apple juice. Isotherms were fitted using the Guggenheim-Anderson-de Boer Model. In none of the cases studied was isotherm non-continuity in the vicinity of the initial value of aw observed. All isotherms, classified as type III, demonstrated an increase in the equilibrium water content, along with an increase in water activity. A higher water content was observed in lyophilised material compared to material dried by convection. The water content in the monolayer (100 g?1 dry matter) ranged from 12.0 g for dried apple, to 17.0 g for dried sour cherry. These values can be considered as optimal in order to ensure safe storage conditions. The dried fruits should therefore be kept in a water activity range of 0.45 – 0.54 for lyophilised, and 0.46 – 0.63 for convectively-dried material. 相似文献
35.
Zbigniew Draczyński Maciej Boguń Stanisław Rabiej Teresa Mikołajczyk Grzegorz Szparaga Paulina Król 《Fibers and Polymers》2013,14(7):1107-1117
An investigation was made of the effect of basic spinning process parameters on the structure and properties of butyric-acetate copolymer of chitin (BOC) fibres. It was found that, considering the resulting tenacity of 20.3 cN/tex simultaneously with high water sorption and retention properties, it is favourable for the BOC fibre spinning process to be carried out with 1 % HAp or TCP nanoadditive. Furthermore, when 3 % of the HAp or TCP nanoadditive is incorporated into the BOC fibre material, no significant changes in the crystal structure occur compared with fibres without the nanoadditives, formed in similar conditions. Analysis of the porous structure and the properties of the surface of BOC fibres with HAp or TCP nanoadditive shows that the parameters are favourable for their medical application. 相似文献
36.
Zbigniew Kaczkowski Piotr Frankiewicz Aleksander Gralczyk 《Fisheries Management and Ecology》2019,26(3):187-199
The Pilica River has warmed at a rate of 0.06°C per year since 1969, threatening the ecological services provided by the Sulejów Reservoir. Gillnet sampling revealed that the reservoir is inhabited by a cyprinid‐dominated fish assemblage with roach, Rutilus rutilus (L.) (42% of the total biomass), the dominant species. However, the interest of the anglers was primarily focused on common bream, Abramis brama (L.) (almost 65% of the catch), as revealed by the catch statistics (2004–2014). No direct evidence was found that the temperature increase had an influence on the recreational fishery or fish assemblage structure. On the other hand, changes in the fish assemblage that were reflected in angler catch composition were observed. A decrease in the catch of common bream in gillnets was accompanied by a shift in angler choices towards roach and other fish species. The sustainability of recreational fisheries is more likely to be influenced by changes in the economic status of society, water quality (toxic cyanobacteria blooms) and water management practices in Poland. The question arises about which species will dominate in the impoundment in the future if the warming trend continues and common carp, Cyprinus carpio L., stocking is maintained. 相似文献
37.
Aleksandra Górecka-Bruzda Ewa Jastrzębska Anna Muszyńska Ewa Jędrzejewska Zbigniew Jaworski Tadeusz Jezierski Jack Murphy 《Journal of Veterinary Behavior: Clinical Applications and Research》2013,8(4):253-260
Show jumping is one of the most popular equestrian disciplines although strategic jumping per se is seldom used by free-living horses when negotiating obstacles that they might otherwise avoid. To establish if horses are naturally motivated to jump, we examined horses in a free-choice situation when negotiating various obstacles under test conditions. Eighteen leisure horses (LHs) and 16 sport horses (SHs) participated in a number of 2-choice tests. First, horses were presented with 2 optional routes during a “free-choice test” to reach a food stimulus. The choices were a shorter route (over an obstacle) or a longer route (around the obstacle). During 8 consecutive trials, the horses encountered an increase in obstacle height on every second trial as follows: 0, 20, 35, and 50 cm. In the “ridden test” after an initial conditioning period, the horses were tested with a Y-maze formation during 3 consecutive trials, where one element of the maze contained an obstacle arm (OA). The horses walked or trotted over the obstacle most frequently (59.9%) and jumped the obstacle in only 10.7% of the cases. For both the LH and SH groups, the horses' motivation to traverse the obstacle decreased as the obstacle height increased and only 44.1% of horses actually negotiated the 50-cm obstacle as compared with the 20-cm obstacle (85.3%). The LH group preferred to go around the obstacle significantly more often than the SH group (24 trials, 16.7% vs. 9 trials, 7.0%, for SH and LH, respectively; χ2 = 6.81, N = 33, P = 0.0090). The LH group used a jumping strategy to clear the obstacle far less frequently (6 trials, 4.2%) than the SH group (23 trials, 18.0%; χ2 = 9.96, N = 29, P = 0.0023). In the Y-maze trials, the LH group exhibited preference (40 per 54 trials, 74.1%; χ2 = 12.5, P < 0.0001), and the SH group failed to exhibit any preference (20 per 48 trials; χ2 = 1.33, P = 0.3123). There was no evidence of any correlation between the motivation to clear the obstacle and total number of OA choices in either the LH group (rs = 0.13, P = 0.9594) or the SH group (rs = ?0.25, P = 0.3492). The findings from the present study indicate that SHs are motivated and willing to jump obstacles more often than are LHs under similar conditions. However, the apparent reluctance of the horses overall to continue jumping as the obstacle height increases suggests that, in general, many horses could easily encounter excessive demands (overfacing) in sport. This issue should be carefully monitored in terms of equine training, competition, and welfare. 相似文献
38.
Boczoń Andrzej Hilszczańska Dorota Wrzosek Marta Szczepkowski Andrzej Sierota Zbigniew 《European Journal of Forest Research》2021,140(6):1301-1321
European Journal of Forest Research - Drought in the forest is not only a prolonged state of water shortage, but also an occasion where interactions between plants and fungi are affected. Water... 相似文献
39.
Zbigniew Ziembik Agnieszka Dołhańczuk-Śródka Andrzej Komosa Jolanta Orzeł Maria Wacławek 《Water, air, and soil pollution》2010,206(1-4):307-320
Distribution of 137Cs and 239,240Pu in the forest soils horizons of the Opole Anomaly was established. Gamma and alpha spectrometry was used for determination of these isotopes. It was found that the 137Cs activity was approx. 1,000 times higher than that of 239,240Pu. The highest activities of both radioisotopes were found close to the boundary region in soil profile where the organic horizon turns into the inorganic one. Cluster analysis did not clearly indicate the group’s existence in data in respect to 137Cs and 239,240Pu activities and organic matter content. Distributions of 137Cs and 239,240Pu in soil horizons were non-normal but similar to each other. These distributions were substantially different from that one for organic matter content. The data were separated into two groups, for organic and inorganic soil horizons, respectively. Data transformation using Box–Cox formula was performed following by standardization. Mutual relationships between variables were investigated using ordinary and robust regression methods. Good correlation between 137Cs and 239,240Pu was found. No significant relationship between organic matter content and radioisotopes activity was asserted. 相似文献
40.
Duda M Durlej M Knet M Knapczyk-Stwora K Tabarowski Z Slomczynska M 《The Journal of reproduction and development》2012,58(4):438-444
In mammalian ovaries, the majority of follicles are lost before ovulation by atresia. This degenerative process is initiated or caused by granulosa cell apoptosis. To reveal the androgen-dependent mechanism of selective follicular atresia, the culture model system for agonism and antagonism of the androgen receptor has been established. We examined the influence of an androgen receptor antagonist, 2-hydroxyflutamide (2-Hf), on the incidence of apoptosis in cultured porcine granulosa cells. They were incubated (6 and 12-h) in the presence of testosterone (T, 10(-7)M), 2-Hf (1.7×10(-4) M) or both T and 2-Hf (T+2-Hf), and then analyzed by flow cytometry with fluorescein labelled annexin V. To better imitate in vivo conditions, the intact porcine follicles (6-8 mm in diameter) have been incubated in an organ culture system with the addition of the same factors. Sections obtained from follicles fixed after culture were stained with hematoxylin and eosin, and the presence of apoptosis-related DNA strand breaks was evaluated by the TUNEL method. Estradiol and progesterone concentrations in the culture media were measured by radioimmunoassays. The addition of T or 2-Hf to the culture media caused an increase in the number of apoptotic granulosa cells, while treatment with T+2-Hf decreased it in both in vitro and organotypic models. Follicles cultured with the addition of T or 2-Hf exhibited morphological changes indicating follicular atresia. Granulosal estradiol secretion was considerably stimulated by T+2-Hf. The highest increase in follicular estradiol secretion was observed after the anti-androgen addition. In both granulosal and follicular cultures, the production of progesterone declined in the presence of T or 2-Hf but increased after their simultaneous addition. In conclusion, androgen receptor antagonist 2-Hf attenuates induction of granulosa cell apoptosis in the presence of a high T level. The nature of this protective mechanism as yet is unknown and requires further research. 相似文献