全文获取类型
收费全文 | 66篇 |
免费 | 3篇 |
专业分类
林业 | 14篇 |
农学 | 2篇 |
12篇 | |
综合类 | 5篇 |
农作物 | 6篇 |
水产渔业 | 15篇 |
畜牧兽医 | 8篇 |
园艺 | 1篇 |
植物保护 | 6篇 |
出版年
2023年 | 2篇 |
2021年 | 2篇 |
2020年 | 5篇 |
2019年 | 3篇 |
2018年 | 1篇 |
2017年 | 3篇 |
2016年 | 3篇 |
2015年 | 4篇 |
2014年 | 1篇 |
2013年 | 8篇 |
2012年 | 7篇 |
2011年 | 4篇 |
2010年 | 2篇 |
2009年 | 3篇 |
2008年 | 1篇 |
2007年 | 5篇 |
2006年 | 4篇 |
2005年 | 4篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 1篇 |
1992年 | 1篇 |
1988年 | 1篇 |
1979年 | 1篇 |
排序方式: 共有69条查询结果,搜索用时 31 毫秒
1.
Yokoo M Shimizu T Kimura N Tunjung WA Matsumoto H Abe H Sasada H Rodriguez-Martinez H Sato E 《The Journal of reproduction and development》2007,53(2):263-270
Previous our studies have shown that CD44, the principal receptor for hyaluronan, is present on cumulus cells during oocyte maturation. Although hyaluronan-CD44 interaction has been implicated in cumulus expansion and/or oocyte maturation, the full significance of CD44 remains unknown. The objective of the present study was to further investigate the role of CD44 in cumulus expansion and oocyte maturation in pigs. We demonstrate here in that CD44 has a key role in oocyte maturation but not in cumulus expansion. Previous studies have reported the physiological significance of cumulus expansion in oocyte maturation. However, our results suggest that cumulus expansion is a necessary condition for oocyte maturation, but that it is not sufficient on its own. Furthermore, western blot analysis demonstrated that the CD44 of the in vitro-matured cumulus-oocyte complexes (COCs) had a larger molecular weight and more terminal sialic acid, which has been proven to inhibit the hyaluronan-binding ability of the receptor, than the CD44 of the in vivo-matured COCs, indicating that the hyaluronan-CD44 interactions during in vitro maturation might be insufficient compared with those in vivo. The insufficient interactions of hyaluronan-CD44 during in vitro maturation may cause the inferior capacity of fertilization and development of oocytes matured in vitro. 相似文献
2.
Evaluation of the Diagnostic Accuracy of Conventional 2‐Dimensional and 3‐Dimensional Computed Tomography for Assessing Canine Sacral and Pelvic Fractures by Radiologists,Orthopedic Surgeons,and Veterinary Medical Students
下载免费PDF全文
![点击此处可从《Veterinary surgery : VS》网站下载免费的PDF全文](/ch/ext_images/free.gif)
3.
We studied two clones of Eucalypt urograndis hybrid (Eucalyptus grandis 9 E. urophylla), GR283 and GR330, grown in Tumkur district of Karnataka (India), and felled 5–6 years old three trees of each clo... 相似文献
4.
5.
van Schaik CP Ancrenaz M Borgen G Galdikas B Knott CD Singleton I Suzuki A Utami SS Merrill M 《Science (New York, N.Y.)》2003,299(5603):102-105
Geographic variation in some aspects of chimpanzee behavior has been interpreted as evidence for culture. Here we document similar geographic variation in orangutan behaviors. Moreover, as expected under a cultural interpretation, we find a correlation between geographic distance and cultural difference, a correlation between the abundance of opportunities for social learning and the size of the local cultural repertoire, and no effect of habitat on the content of culture. Hence, great-ape cultures exist, and may have done so for at least 14 million years. 相似文献
6.
7.
Dwinita Wikan Utami Puji Lestari Sri Koerniati 《Journal of Crop Science and Biotechnology》2013,16(1):1-7
Discovery of new alleles at important gene loci through allele mining could support the rice improvement program to sustain national food security. Evaluation of the existing Indonesian local rice landraces is an important point to detect the potential of functional alleles. One of the bacterial leaf blight (BLB) resistance alleles, Xa7 was detected in Indonesian rice landrace germplasm, Parekaligolara. To validate this potential allele, field evaluation on the segregating population, expression analysis using real time RT-PCR, and sequencing were carried out. Two selected Parekaligolara progenies lines (F4 and F6) from double crosses with other selected landraces were clearly more resistant to a dominant Indonesian BLB, Race IV. Specific primers of Xa7-LD40 successfully amplified the alleles of F4 and F6 lines approximately 300 bp in length. The amplicon sequenced using vector-targeted primers, resulting 264 bp which were flanked between 602 and 866 bp sites. The translated sequence which produced 60 amino acids (open reading frame) ORF, showed homology with the encoding gene associated with the defense system to biotic stress, BTB/POZ. As integrated researches for many potential biotic and abiotic stresses alleles on Indonesian landraces germplasm, this outcome expectedly supports rice landraces utilization for developing of elite cultivars which survive on global changed conditions and benefiting to national food security. 相似文献
8.
Denny Irawati Yuya Takashima Chisato Ueda J. P. Gentur Sutapa Sri Nugroho Marsoem Futoshi Ishiguri Kazuya Iizuka Nobuo Yoshizawa Shinso Yokota 《Journal of Wood Science》2013,59(6):522-527
We examined the enzymatic saccharification and ethanol fermentation of the spent media (SMs) from Auricularia polytricha cultivation using wood meals of Falcataria moluccana, Shorea sp., and Tectona grandis. Although the hydrolysis weight decrease and reducing sugar yield were higher in SM of F. moluccana, the ethanol yield was higher in SM of Shorea sp. Ozone treatment of SM further increased the hydrolysis weight decrease, reducing sugar, and ethanol yields in Shorea sp. These results indicate that SM of A. polytricha is a suitable biomass material to produce fermentable sugars for ethanol production, and that ozone treatment is a suitable method for increasing the ethanol yield. 相似文献
9.
Nunik S. Ariyanti Sri S. Tjitrosoedirdjo S. Robbert Gradstein 《Biological conservation》2008,141(10):2516-2527
Forest disturbance and transformations into agricultural land alter tropical landscapes at drastic rates. Here, we investigate bryophyte assemblages on trunk bases in natural forest, selectively logged forest and cacao agroforests that are shaded by remnants of natural forest in Central Sulawesi. Overall, bryophyte richness per site did not differ between forest types. However, mosses and liverworts reacted differently in that moss richness was lowest in cacao agroforests, whereas liverwort communities were equally rich in all forest types. In terms of cover, mosses remained unaffected while liverwort cover decreased significantly in disturbed forest. Species composition of bryophytes clearly changed in cacao agroforests as compared to natural forests and selectively logged forests. In particular some drought-sensitive species were rare or absent in cacao agroforests and were replaced by drought-tolerant ones, thus underlining the importance of microclimatic changes. Moreover, differences in bryophyte species composition between large and small trees were only pronounced in cacao agroforests, presumably due to concomitant changes in stemflow of precipitation water. In conclusion, the bryophyte assemblages of selectively logged forests and cacao agroforests were as rich as in natural forest, but species turn-over was particularly high towards cacao agroforests probably due to microclimatic changes. Maintenance of shade cover is crucial to the conservation of the drought-sensitive forest species. 相似文献
10.
Gunanti Mahasri Umi Hafidloh Fungky P. Pratama Dicky Rahmawan Sri Subekti Putri D. Wulansari Muhamad Amin 《Journal of fish diseases》2020,43(10):1133-1143
The marine leech, Zeylanicobdella arugamensis, is a major threat to aquaculture in grouper-producing countries including Indonesia. This study aimed at investigating prevalence, intensity and histopathology of the ectoparasite in humpback and hybrid groupers cultured in different rearing systems. A total of 260 groupers (60 humpback groupers and 200 hybrid groupers) were used for samples. The marine leech was observed on skin, fins, gills and mouth, followed by histopathological assay on the skin tissue. The results showed that prevalence of the leech in both groupers was higher when they were cultured in the floating net cages compared with the hatchery, p < .05. Furthermore, humpback grouper had a higher prevalence than hybrid grouper when they were cultured in a similar system, p < .05. Meanwhile, there was no significant difference in intensity between the two groupers, p > .05. Within the hybrid groupers, the highest prevalence was obtained from hybrid groupers reared in the earthen ponds. Histopathological studies showed that the infected groupers exhibited inflammation, congestion and erosion of the epidermis layer. Hybrid grouper had more severe histopathological lesions in the skin tissues. These results suggested that species and type of aquaculture system had significantly determined the prevalence, intensity and severity of lesion in Z. arugamensis infestation. 相似文献