全文获取类型
收费全文 | 197篇 |
免费 | 7篇 |
专业分类
林业 | 25篇 |
农学 | 3篇 |
9篇 | |
综合类 | 6篇 |
农作物 | 2篇 |
水产渔业 | 21篇 |
畜牧兽医 | 121篇 |
植物保护 | 17篇 |
出版年
2023年 | 1篇 |
2022年 | 9篇 |
2021年 | 7篇 |
2018年 | 3篇 |
2017年 | 4篇 |
2016年 | 6篇 |
2015年 | 11篇 |
2014年 | 10篇 |
2013年 | 9篇 |
2012年 | 12篇 |
2011年 | 18篇 |
2010年 | 6篇 |
2009年 | 7篇 |
2008年 | 11篇 |
2007年 | 9篇 |
2006年 | 22篇 |
2005年 | 9篇 |
2004年 | 11篇 |
2003年 | 12篇 |
2002年 | 9篇 |
2001年 | 6篇 |
2000年 | 4篇 |
1999年 | 1篇 |
1997年 | 1篇 |
1996年 | 3篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
排序方式: 共有204条查询结果,搜索用时 449 毫秒
91.
Miyuki KITAOKA Shuichi HIRAI Hayato TERAYAMA Munekazu NAITO Ning QU Naoyuki HATAYAMA Hidenobu MIYASO Yoshiharu MATSUNO Masatoshi KOMIYAMA Masahiro ITOH Chisato MORI 《The Journal of reproduction and development》2013,59(5):485-490
Exposure to di-(2-ethylhexyl) phthalate (DEHP) has been reported to induce
spermatogenic disturbance through oxidant stress and affect the immune system as an
adjuvant. However, the effect of DEHP on the testicular immune microenvironment has
not yet been investigated. In the present study, we examined the testicular immune
microenvironment after exposure to doses of DEHP, previously identified as
no-observed-adverse-effect levels. Adult male mice were administered food containing
0%, 0.01% or 0.1% DEHP and then testes were analyzed. The results showed that a
slight but significant spermatogenic disturbance appeared in the 0.1% DEHP group but
not in the 0.01% DEHP group at 8 weeks. It was also demonstrated that lymphocytes and
F4/80- and MHC class II- positive cells were significantly increased with the
elevation of IL-10 and IFN-γ mRNA expressions in the testes of not only the 0.1% DEHP
group but also the 0.01% DEHP group at 8 weeks. Histochemical analyses involving
horseradish peroxidase (HRP) as a tracer showed that a little blood-borne HRP had
infiltrated into the lumen of a few seminiferous tubules beyond the
blood-testis-barrier in both the 0.1% and 0.01% DEHP groups at 8 weeks. This
indicates that a dose of DEHP that has little effects on spermatogenesis can change
the testicular immune microenvironment with functional damage of the blood-testis
barrier. 相似文献
92.
Yoshinori Hashizawa Masatoshi Kubota Motoni Kadowaki Shinobu Fujimura 《Animal Science Journal》2013,84(11):732-736
This study was conducted to evaluate the effect of dietary vitamin E (VE) on broiler meat quality, especially focused on PSE (pale color, soft and exudative), under chronic heat stress (HS) conditions. Twenty‐eight‐day‐old female Ross broilers were kept in independent cages with a controlled temperature of 24°C (normal temperature: NT) or 30°C (high temperature: HT). The NT chickens were fed basal feed. The HT chickens were fed basal feed (HT) or VE (200 mg/kg) added feed (HT + E). Broilers were weighed and slaughtered at 38 days old. The breast muscle was removed immediately and then the samples were used for determination of meat color, pH, water holding capacity (WHC) and shear force value (SFV). Body weight gain and feed intake were significantly decreased in the HT and HT + E groups compared to the NT group. VE supplementation did not affect the growth performance. Chronic HS at 30°C for 10 days may cause deterioration of meat quality such as PSE. The effects of chronic HS on meat quality were most significant in the toughness of broiler breast meat. Supplementation of VE in broiler feed would be effective to prevent the extent of PSE on broiler meat by chronic HS. 相似文献
93.
The properties of the binderless boards of moso bamboo depending on the harvest seasons and the parts of the height were reported and the optimum harvesting conditions investigated. The binderless boards were prepared from the powdered bamboo harvested each month from June to May, and the parts in height. The hot water extract (HWE), lignin, α-cellulose, and hemicelluloses contents were examined. The board properties were evaluated with internal bonding (IB), water absorption (WA), and thickness swelling (TS). From the experiment, the boards prepared between March and October had higher HWE content and higher IB and lower WA and TS than the ones prepared in other months. The board from the top part showed lower IB and higher WA and TS than the bottom and the middle. The boards prepared from the residue after extraction of HWE showed lower IB than the unextracted samples. These results indicated that for producing board from bamboo, the suitable harvesting season is when HWE contents are higher and that the suitable parts in height for harvesting are the bottom and the middle where lignin contents are not low. 相似文献
94.
Tsunaki Andou Ayako Yamaguchi Shinji Kawano Kunimasa Kawabe Shigenori Ueda Masatoshi Onuki 《Journal of General Plant Pathology》2010,76(4):287-291
In 2005, severe leaf curling and yellowing were observed on tomato plants on Ishigaki Island. Because the symptoms were consistent
with infection by a begomovirus, we used a polymerase chain reaction (PCR) with specific primers for begomovirus DNA-A and
DNA satellite component (DNA-β) and detected products of the expected sizes from symptomatic tomato plant samples. DNA sequence
analyses of the PCR products revealed that the symptomatic tomato plants were associated with Ageratum yellow vein virus (AYVV) infection. We confirmed AYVV transmission from the naturally infected weed host, Ageratum conyzoides, to healthy tomato plants by the insect vector Bemisia tabaci B biotype. This report is the first of AYVV occurrence in Japan. 相似文献
95.
Honghai Liu Lin Yang Yingchun Cai Masatoshi Sugimori Kazuo Hayashi 《Journal of Wood Science》2010,56(2):95-99
To improve the accuracy of the new in-process moisture content (MC) monitoring concept under radiofrequency/vacuum (RF/V)
drying, equilibrium moisture content (EMC) tests were carried out under various ambient pressures, and pressure curves in
wood were analyzed during chamber evacuation and heating phases. The results showed that EMC increased with a decrease in
ambient pressure regardless of temperature, relative humidity (RH), and species. The accuracy of MC estimation for Hinoki
under RF/V drying was improved from 1.5% maximum absolute errors to 0.6% after EMC modification. The pressure curves for Hinoki
and Sugi under RF/V drying showed similar tendencies to an idealized process. Russian larch showed different curves, indicating
that the pressure in the wood did not reach the ambient pressure because of its low permeability. Therefore, MC could not
be estimated using this monitoring concept because of the presence of much air in the wood of Russian larch. 相似文献
96.
Masatoshi Ban Hiroyuki Nagoya Shunpei Sato Hirohumi Yaegashi Masaki Ichimura Nobuhiro Sato 《Fisheries Science》2013,79(6):967-975
We evaluated the potential for hybridization between Atlantic salmon and salmonids currently present in Japan. We performed artificial and natural crosses and tested for hybridization using short interspersed elements. We documented the occurrence of hybrids and gynogenesis following artificial crossing. However, the survival rate of these offspring was low (<2 % to the fry stage). We were unable to obtain viable offspring from natural crosses of Atlantic salmon and chum salmon or masu salmon. Our results suggest that there is little risk of hybridization between Atlantic salmon and salmonids that are currently present in the wild in Japan. Furthermore, our results suggest that gynogenesis may occur naturally. 相似文献
97.
Sasaoka F Suzuki J Fujihara M Watanabe Y Nagai K Harasawa R 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2012,74(1):83-87
The intergenic spacer region between the 16S and 23S rRNA genes of mycoplasmas has been used for a genetic marker for identification of the species. Here we show the intergenic spacer regions of two hemotropic mycoplasmas, Mycoplasma haemofelis and 'Candidatus Mycoplasma haemobos (synonym: 'C. M. haemobovis')' are also useful for classification of this particular group of mycoplasms. The spacer region of M. haemofelis and `C. M. haemobos' consisted of 209 and 210 base pairs, respectively, and both lacked the spacer tRNA genes. Phylogenetic analysis suggested a monophyletic relationship among hemoplasmas and M. fastidiosum. A hypothetical secondary structure predicted in the spacer regions tentatively assigned the boxA and boxB motifs peculiar to the members of the genus Mycoplasma. M. haemofelis and 'C. M. haemobos' possessed a stem-loop structure in common, despite the presence of a palindromic nucleotide substitution in the stem region. 相似文献
98.
Kamata M King JN Seewald W Sakakibara N Yamashita K Nishimura R 《Veterinary journal (London, England : 1997)》2012,193(1):114-118
The objective of this study was to evaluate the efficacy and tolerability of robenacoxib, a selective cyclooxygenase-2 inhibitor, for the treatment of post-operative pain and inflammation in cats. The study was a prospective, multi-centre, randomised, blinded, non-inferiority design clinical study to compare robenacoxib to meloxicam. Ninety-six cats undergoing surgery at eight centres in Japan were allocated randomly to receive a single s.c. injection of robenacoxib (2 mg/kg, n=67) or meloxicam (0.3 mg/kg, n=29) shortly before induction of anaesthesia. Most cats underwent soft tissue surgery (n=87), mainly ovariectomy (n=68). Post-operative pain and inflammation were assessed at 3, 8 and 22 h after recovery from anaesthesia using numerical rating scales. For the primary efficacy endpoint (total clinician score), robenacoxib had significantly better efficacy than meloxicam, the relative efficacy ratio being 1.47 (95% confidence interval 1.19-1.78, P=0.0003). For the secondary efficacy endpoints, robenacoxib was superior to meloxicam when assessed on the basis of posture, behaviour, pain on palpation and overall pain control, while meloxicam was superior with respect to wound heat. No cat in either group required rescue analgesia therapy. In tolerability assessments, pain during injection and pain and inflammation at the injection site 22 h after recovery from anaesthesia were rated significantly less with robenacoxib compared to meloxicam. Both treatments were well tolerated on the basis of clinical observations and blood tests, with no significant differences between groups. In conclusion, single pre-operative administration of robenacoxib was well tolerated and had superior efficacy to meloxicam in reducing post-operative pain in cats. 相似文献
99.
Tin NGWE Yoko NUKUI Shinya OYAIZU Genki TAKAMOTO Satoshi KOIKE Koichiro UEDA Hiroki NAKATSUJI Seiji KONDO Yasuo KOBAYASHI 《Animal Science Journal》2012,83(1):43-49
This study evaluated the suitability of easily digested fiber sources as a supplemental fiber to improve overall fiber digestion in ruminants. First, the degradation of five fibrous feedstuffs and the stimulatory effects on rumen bacteria were examined in situ. Chickpea and lablab bean husks were selected for their potential use due to their large degradable fraction (> 94%), which had a stimulatory effect on fibrolytic rumen bacteria such as Fibrobacter succinogenes. Second, a possible improvement in the digestibility of rice straw diet by husk supplementation was monitored in vivo. Four dietary treatments comprising RS (rice straw and concentrate), CHM (RS supplemented with Myanmar chickpea husk), CHE (RS with Egyptian chickpea husk) and LH (RS with lablab bean husk) were allocated to four wethers. The digestibility of acid detergent fiber was 3.1–5.5% greater in CHM and LH than RS. Total volatile fatty acid concentration was higher in LH than other treatments. Acetate proportion was higher in LH than RS. Ruminal abundance of F. succinogenes was 1.3–1.5 times greater in CHM and LH than RS. These results suggest that bean husk supplementation, especially lablab bean husk, might improve the nutritive value of rice straw diet by stimulating fibrolytic bacteria. 相似文献
100.
Florence Hiu Yan Lui Yoko Kurokochi Hiroe Narita Yukie Saito Masatoshi Sato 《Journal of Wood Science》2018,64(3):246-255
Binderless boards are composite boards that rely on self-bonding mechanisms for inter-fibre bonding. Quercus acutissima and Quercus serrata logs degraded by Lentinula edodes (shiitake fungi) were used in this study to investigate whether physical and chemical changes induced by shiitake fungi can enhance board mechanical properties. Binderless boards were manufactured with 0.8 g/cm3 target density, 220 °C pressing temperature, 5 MPa pressure, and pressing duration of 10 min. Boards made from logs degraded for ≥?26 months were stronger than control boards and met modulus of rupture (MOR) and internal bonding (IB) requirements for fibreboards. Chemical composition and particle size distribution of the wood powder used to make the boards were determined to elucidate the drivers of board mechanical properties. The proportion of small particles (<?150 µm) showed a strong positive correlation with MOR for both species and hot water extractives showed a strong positive correlation with IB for Q. acutissima boards. Introduction of shiitake fungi pre-treatment to the production process may enhance the mechanical strength of binderless boards. 相似文献