全文获取类型
收费全文 | 88篇 |
免费 | 6篇 |
专业分类
林业 | 6篇 |
农学 | 13篇 |
11篇 | |
综合类 | 4篇 |
农作物 | 4篇 |
水产渔业 | 6篇 |
畜牧兽医 | 44篇 |
园艺 | 1篇 |
植物保护 | 5篇 |
出版年
2023年 | 1篇 |
2022年 | 4篇 |
2021年 | 11篇 |
2019年 | 2篇 |
2018年 | 1篇 |
2017年 | 2篇 |
2016年 | 5篇 |
2015年 | 3篇 |
2014年 | 5篇 |
2013年 | 11篇 |
2012年 | 8篇 |
2011年 | 7篇 |
2010年 | 4篇 |
2009年 | 6篇 |
2008年 | 6篇 |
2007年 | 4篇 |
2006年 | 2篇 |
2005年 | 1篇 |
2004年 | 2篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 1篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1990年 | 2篇 |
1988年 | 1篇 |
排序方式: 共有94条查询结果,搜索用时 15 毫秒
21.
P.N. Sharma Y. Ketipearachchi K. Murata A. Torii S. Takumi N. Mori C. Nakamura 《Euphytica》2003,129(1):109-117
We have constructed a linkage map of the rice brown planthopper (BPH)resistance gene, Bph1. RFLP and AFLP markers were selected by thebulked segregant analysis and used in the mapping study of 262 F2sthat were derived from a cross of `Tsukushibare', a susceptible japonica cultivar, and `Norin-PL3', an authentic japonicaBph1-introgression line. Twenty markers were mapped within a 28.9-cMregion containing the Bph1 locus on the long arm of rice chromosome12. Combining the result of segregation analysis of BPH resistance by themass seedling test and that of the markers, the Bph1 locus wasmapped within a 5.8-cM region between two flanking markers. The closestAFLP markers, em5814N and em2802N, was at 2.7 cM proximal to theBph1 locus. Together with the previously constructed high-resolutionmap of bph2 locating the locus at ca. 10 cM proximal to the Bph1 locus, this improved version of the linkage map would facilitatepyramiding these two important BPH resistance genes. 相似文献
22.
Effect of temperature on the development of eggs of round herring Etrumeus teres was experimentally examined to construct a temperature-dependent egg development model. Mature fish were collected in the
field and their eggs were artificially fertilized onboard. The eggs were incubated at nine temperatures set between 14.0 and
25.0°C. All eggs at the lowest three temperatures, 14.0°C, 15.0°C, and 16.0°C, ceased development and died at various stages
before hatching. Durations required to hatching after fertilization ranged from 38.0 h at 25.0°C to 90.0 h at 17.5°C. The
temperature-dependent egg development model, i.e., egg age in hours (y
i,t
) at the ith stage and temperature t (°C), was expressed as: y
i,t
= 4.604 × exp(−0.100 × t −0.129 × i) × i
2.593. From the application of the model to early-stage eggs collected in the field, it is concluded that round herring starts
spawning immediately after sunset and almost completes spawning by midnight. The temperature-dependent egg development model
and the daily pattern of spawning presented in this study are essential tools for developing the daily egg production method
to estimate the spawning stock biomass. 相似文献
23.
Shimada T Horikawa T Ikeya Y Matsuo H Kinoshita K Taguchi T Ichinose K Takahashi K Aburada M 《Fitoterapia》2011,82(8):1272-1278
Previously, we reported that rhizome powder of Kaempferia parviflora Wall. Ex. Baker prevented obesity and a range of metabolic diseases. In this study, to clarify which molecular mechanisms and active ingredients of K. parviflora have an anti-obesity effect, we investigated the effect of ethyl acetate extract of K. parviflora (KPE) on TSOD mice, a spontaneously obese Type II diabetes model, and on pancreatic lipase. In the TSOD groups, KPE showed a suppressive effect on body weight increase and visceral fat accumulation and also showed preventive effects on symptoms related to insulin resistance, hypertension and fatty liver. In addition, KPE also suppressed body weight increase and food intake in TSNO mice groups, which served as reference animals, at an early stage of administration. Searching for the ingredients in KPE revealed that KPE contains at least 12 kinds of polymethoxyflavonoid (PMF). Furthermore, KPE and its component PMFs showed an inhibitory effect on pancreatic lipase. The above results suggest that KPE has a preventive effect on obesity and various metabolic diseases. The mechanisms of action probably involve inhibition of pancreatic lipase by the PMFs in KPE. 相似文献
24.
25.
Yuki Okamoto Anh T. Nguyen Motohiro Yoshioka Julio C.M. Iehisa Shigeo Takumi 《Breeding Science》2013,63(4):423-429
Synthetic hexaploid wheat is an effective genetic resource for transferring agronomically important genes from Aegilops tauschii to common wheat. Wide variation in grain size and shape, one of the main targets for wheat breeding, has been observed among Ae. tauschii accessions. To identify the quantitative trait loci (QTLs) responsible for grain size and shape variation in the wheat D genome under a hexaploid genetic background, six parameters related to grain size and shape were measured using SmartGrain digital image software and QTL analysis was conducted using four F2 mapping populations of wheat synthetic hexaploids. In total, 18 QTLs for the six parameters were found on five of the seven D-genome chromosomes. The identified QTLs significantly contributed to the variation in grain size and shape among the synthetic wheat lines, implying that the D-genome QTLs might be at least partly functional in hexaploid wheat. Thus, synthetic wheat lines with diverse D genomes from Ae. tauschii are useful resources for the identification of agronomically important loci that function in hexaploid wheat. 相似文献
26.
Hiroshi Kobayashi Masahiro Iwaoka Takumi Uemura Ichiro Kageyama 《Journal of Forest Research》1996,1(1):57-59
The high quality forest machines have recently become very popular in Japan. Many improvements on these machines have been
made to fit the Japanese forests. This report describes the improvement and evaluation of the feller-buncher head of the prototype
machine: FG-35. This head is mounted on the telescopic and knuckle-boom carrier. The prototype machine was improved to cut
the trees, felled down on the ground or felled side ways by the storm as in the Kyushu district. And also the machine was
improved so that it could be driven well without crashing the chainsaw-bar by the beginners. The testing operation of this
machine carried out in Sumita-chou in Iwate and in Kuzu-chou in Oita. The productivity of the machine can be estimated at
about 20 m3/h. The results of the improvement on the machine can be said to be good.
A portion of this report was presented at the 106th Annual Meeting of the Japanese Forestry Society (1995). 相似文献
27.
Katsuhisa Takumi Peter Teunis Manoj Fonville Isabelle Vallee Pascal Boireau Karsten Nöckler Joke van der Giessen 《Veterinary parasitology》2009,159(3-4):324-327
Trichinella is a food-borne parasitic zoonoses and human cases are still reported in Europe mainly due to the consumption of pig meat originating from small backyard farms. Infections originating from industrialized pig farming have not been reported for decades in Europe, due to control measures to prevent the transmission of Trichinella from wildlife by indoor housing and good management practices. Therefore, risk-based monitoring programs might replace individual carcass control in industrialized pig farming as described in EU legislation SANCO 2075/2005. Transmission of Trichinella species between wildlife and the risk that may pose to humans via consumption of contaminated pork meat has not been studied quantitatively. One pathway by which human trichinellosis can occur is the rat–pig–human route. To evaluate the transmission risk though this pathway the dose responses of rat, pig, and human were studied. Experimental T. spiralis infection was performed in rats with doses of as few as 10 parasites and the data set was analysed using a newly developed dose response model that describes larvae per gram (LPG). Experimental T. spiralis infection in pig was analysed in a similar way. Furthermore nine published outbreaks of human trichinellosis were analysed to determine the dose response in humans. The risk of human trichinellosis via the rat–pig–human transmission was simulated by the Monte Carlo method. A pair of female and male parasites representing the lowest infection pressure from the environment, led to the probability of human trichinellosis by consumption of 100 g of raw pork meat equal to 5% via the studied rat–pig–human pathway. In the absence of rodent control near the farm, a low infection pressure from wildlife presents a relatively high risk of human trichinellosis via consumption of uncooked pork meat. 相似文献
28.
Katayama Y Wada R Kanemaru T Sasagawa T Uchiyama T Matsumura T Anzai T 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2003,65(6):757-759
Equine protozoal myeloencephalitis developed in a three-year-old male Thoroughbred racehorse imported from the United States. The animal showed astasia five days after the onset of ataxia. Histopathologically, focal nonpurulent myelitis accompanied by hemorrhage and perivascular infiltration was observed in the fourth and fifth cervical spinal cord. Immunohistochemically, shizonts were occasionally observed and were positive for anti-Sarcocystis neurona (S. neurona) antiserum. S. neurona-specific antibodies were detected in the serum and cerebrospinal fluid by Western blot. This is the first equine protozoal myeloencephalitis case in Japan. 相似文献
29.
Yuichiro Muramatsu Usio Fukushima Soroku Kudo Takumi Akatsuka Kenichiro Ono Hidehiro Hirao 《The Canadian veterinary journal. La revue veterinaire canadienne》2021,62(11):1185
A 13-year-old, male Pomeranian dog was presented for scleral rupture with intraocular hemorrhage and retinal detachment in the right eye. After intrascleral silicone ball prosthesis, recurrent swelling and granulomatous blepharitis were observed for 140 d and finally melting keratitis developed. Although an intraorbital prosthesis was implanted, recurrent, serious, erosive, and ulcerative blepharitis developed with high plasma C-reactive protein concentrations. Since the blepharitis could not be controlled, the silicone ball was removed and the affected orbit was debrided. The blepharitis resolved rapidly, and the orbit healed routinely. Positive allergic reactions to silicone were discovered through a patch test.Key clinical message:To the authors’ knowledge, this is the first report on silicone allergy in a dog with positive allergic reactions to silicone in the patch test. 相似文献
30.