全文获取类型
收费全文 | 238篇 |
免费 | 16篇 |
专业分类
林业 | 7篇 |
农学 | 4篇 |
35篇 | |
综合类 | 17篇 |
农作物 | 9篇 |
水产渔业 | 28篇 |
畜牧兽医 | 140篇 |
植物保护 | 14篇 |
出版年
2023年 | 1篇 |
2022年 | 6篇 |
2021年 | 16篇 |
2020年 | 9篇 |
2019年 | 12篇 |
2018年 | 9篇 |
2017年 | 8篇 |
2016年 | 10篇 |
2015年 | 7篇 |
2014年 | 4篇 |
2013年 | 18篇 |
2012年 | 7篇 |
2011年 | 22篇 |
2010年 | 8篇 |
2009年 | 12篇 |
2008年 | 16篇 |
2007年 | 18篇 |
2006年 | 7篇 |
2005年 | 16篇 |
2004年 | 16篇 |
2003年 | 5篇 |
2002年 | 5篇 |
2001年 | 2篇 |
2000年 | 3篇 |
1999年 | 3篇 |
1990年 | 1篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1973年 | 2篇 |
1966年 | 1篇 |
排序方式: 共有254条查询结果,搜索用时 15 毫秒
101.
Guangdou Qi Zhifei Pan Yuki Yamamoto Fetra Jules Andriamanohiarisoamanana Takaki Yamashiro Masahiro Iwasaki Ikko Ihara Suchon Tangtaweewipat Kazutaka Umetsu 《Animal Science Journal》2019,90(2):297-303
The introduction of biogas plants is a promising way to recycle organic wastes with renewable energy production and reducing greenhouse gas. Application of anaerobic digestate as a fertilizer reduces the consumption of chemical fertilizers. In this study, the survival of pathogenic bacteria and plant growth promoting bacteria (PGPB) in two full‐scale biogas plants operated at mesophilic condition were investigated. Feedstock and anaerobic digestate samples were collected from biogas plants and bacteria load in samples were detected using standard dilution plate method. Pathogenic bacteria were reduced to not detected level through mesophilic digestion tank except for Campylobacter. However, it could be reduced by 98.7% through a sterilization tank. Bacillus was detected at 8.00 and 7.81 log10 CFU/g dry matter in anaerobic digestates, and it was also resistant to sterilization tank. Bacillus spp. is considered to be the safe bacteria that hold remarkable abilities for promoting plant growth. The results showed that treatment at biogas plants is effective to reduce pathogenic bacteria in dairy manure, and sterilization could further reduce the sanitary risks of pathogenic bacteria relating to anaerobic digestate application. Anaerobic digestates could also be utilized as bio‐fertilizer as the high load of plant growth promoting bacteria. 相似文献
102.
103.
Ryota Iwasaki Yuka Shimosato Ryutaro Yoshikawa Sho Goto Kyoko Yoshida Mami Murakami Mifumi Kawabe Hiroki Sakai Takashi Mori 《Veterinary and comparative oncology》2019,17(3):385-393
This retrospective study aimed to evaluate factors associated with survival and to compare characteristics between tumour localizations in dogs with urinary transitional cell carcinoma (TCC) that underwent whole‐body computed tomography (CT) at diagnosis. Dogs with histologically confirmed TCC that received medical therapy between 2010 and 2017 were included; dogs that underwent surgery or radiotherapy for the primary tumour were excluded. According to the CT findings, primary tumour localization (classified into the Bladder, Urethra and Bladder and Urethra groups), prostate involvement, iliosacral lymphadenomegaly, sternal lymphadenomegaly and metastasis to the bone and lung were evaluated for survival analysis. CT at diagnosis revealed iliosacral lymphadenomegaly, sternal lymphadenomegaly, bone metastasis and lung metastasis in 47.7%, 18.5%, 24.6% and 35.4% of the 65 included dogs, respectively. The overall median survival time was 196 days. On multivariable analysis, TCC localization (hazard ratio [HR], 1.90; P = .037), bone metastasis (HR, 2.76; P = .013) and sternal lymphadenomegaly (HR, 3.56; P = .004) were significantly associated with survival. Compared to the Bladder group (n = 16), the Urethra group (n = 26) had higher metastasis rates to the bone (6.3% vs 42.3%; P = .045) and lung (6.3% vs 46.2%; P = .022). The survival time was shorter in the Urethra group than in the Bladder group (121.5 vs 420 days; P < .001), and it was similar only in female dogs (247 vs 420 days; P = .031). These findings suggest that whole‐body CT could be valuable for predicting the prognosis in urinary TCC. 相似文献
104.
Daisuke Sakamoto Takashi Nemoto Noriyuki Sunoh Jun Iwasaki Shintaro Niwa Kazunori Arayama Naoki Suzuki Pai-Son Kaori Takagi Kazumi Sakuramoto 《Fisheries Science》2014,80(5):907-914
We estimated the population size of the pond smelt Hypomesus nipponensis at the beginning of the fishing season in Lake Kasumigaura and Lake Kitaura, Japan using two DeLury methods and cohort analysis. A growth curve was estimated on the basis of monthly standard length. The relationship between standard length and weight was utilized for calculating the mean weight on the survey day in a particular month. Total monthly catches in Lake Kasumigaura and Lake Kitaura were calculated using partial monthly pond smelt catch obtained from processing plants located near the lakes between July and December. The total monthly catch was calculated from the total monthly catch weight and the monthly mean weight. The number of boats operating each month, compiled by the Kasumigaura-Kitaura Fisheries Office of Ibaraki Prefecture, was also employed. The estimated initial population sizes were compared with the population level index (PLI) estimated from survey data before the start of the fishing season. No significant differences were detected among the initial population sizes estimated by DeLury method, cohort analysis and PLI. The estimates ranged from 7.4 million to 410 million in Lake Kasumigaura, and from 7.7 million to 44 million in Lake Kitaura. 相似文献
105.
106.
Recombinant canine interferon-gamma (KT-100) or topical antihistamine (diphenhydramine: DH) was administered to dogs with atopic dermatitis (AD) for 4 weeks and their efficacies were compared using pruritus, excoriation, erythema and alopecia as evaluation criteria. Clinical studies on 92 atopic dogs (KT-100 group: 63, DH group: 29) were conducted at 18 animal hospitals in Japan. KT-100 was administered subcutaneously once a day three times a week on alternating days for 4 weeks. DH was administered topically twice daily for 4 weeks. The efficacy rates of the KT-100 group on day 28 were 72.1% for pruritus, 73.8% for excoriation, 75.4% for erythema and 60.7% for alopecia, which were significantly higher than those of the DH group (20.7% for pruritus, 27.6% for excoriation, 24.1% for erythema and 24.1% for alopecia). 相似文献
107.
Plasma histamine concentration and histamine detection in peripheral blood eosinophils in cats 总被引:1,自引:0,他引:1
Plasma histamine levels were measured in 11 clinically healthy cats and 15 cats with allergic dermatitis. Histamine levels were markedly elevated in 5/15 allergic cats. A calcium ionophore, A23187, stimulates histamine release from feline peripheral blood cells. Immunostaining of blood smears from clinically healthy cats revealed that approximately 10% of eosinophils possessed histamine-containing granules. These results indicate that some peripheral eosinophils in cats contain histamine and can release histamine by appropriate stimulation. 相似文献
108.
Miori Kishimoto Kazutaka Yamada Junichiro Shimizu Ki-Ja Lee Hirokazu Watarai Hany Y. Hassan Toshiroh Iwasaki Yoh-Ichi Miyake 《Veterinary research communications》2009,33(4):387-393
The purpose of the study reported here was to discuss the level of intelligibility of three-dimensional computed tomography
(3D-CT) images of clinical patients for persons who are lacking veterinary knowledge. 143 undergraduate students were participated
in this study. They were entirely unfamiliar with veterinary anatomy. A survey was conducted using the visual analog scale
method with a focus on the level of intelligibility of the 3D-CT images compared to that of the two-dimensional CT images
or radiographs. As a result, the mean value of the intelligibility of the 3D-CT image was 88.4 ± 17.8 points out of 100 points.
In clinical cases, it is very difficult for pet owners lacking veterinary knowledge to understand the clinical status of their
pets even with explanations using illustrations, radiographs, and transverse CT images. It is considered that better informed
consent and patient satisfaction will be obtained provided veterinarians make an effort towards intelligible patient education
by using 3D-CT images. 相似文献
109.
Kagabu S Ohno I Tomizawa M Durkin KA Matsuura R Uchiyama D Nagae N Kumazawa S 《Journal of agricultural and food chemistry》2010,58(22):11832-11836
Bis-imidacloprid (bis-IMI) analogues with suitable alkylene spacers have plant-systemic insecticidal properties. The alkylene-tethered bis-IMI binds in a unique mode to the insect nicotinic acetylcholine receptor (nAChR) wherein the chloropyridine moieties are embraced by two distinct and distant domains. The heptamethylene spacer optimally bridges these two subsites, yet the linker itself binds in a relatively nonspecific manner. This investigation examines the hypothesis that a bis-IMI analogue with a heteroaromatic tether, which undergoes specific interaction(s) with the newly recognized receptor cavity, may enhance the potency relative to those of the alkylene-tethered derivatives. Remarkably, a novel bis-IMI with a furan-2,5-dimethylene fulcrum showed highest receptor potency and insecticidal activity among the analogues with various chemotype spacers. The nAChR structural model, simulating the binding site interactions of the furan-2,5-dimethylene-tethered bis-IMI, reveals that the furan ring is nestled in a hydrophobic pocket, consisting of three aromatic amino acids, and is stabilized via hydrogen bonding. 相似文献
110.
This study was conducted to assess the cytoplasm effects of Brassica napus and B. juncea on the some characteristics of B. carinata, as well as the phylogenetic distances separating the three species. Alloplasmic lines of B. carinata were developed from B. napus × B. carinata and B. juncea × B. carinata hybrids by recurrent backcrossing to the BC7 generation. Sixteen populations from three generations were compared for a number of characteristics. Plants with the cytoplasm
of B. napus flowered later, had shorter filaments and longer pistils, lower pollen amount, lower seed set, lower petal length and width
and different petal color; plants with the cytoplasm of B. juncea had shorter pistils and filaments, and lower petal length and width than their corresponding euplasmic sibs, respectively.
The results suggest that the cytoplasm is involved in the development of flower organs. The natural species, B. carinata showed a balance between the nucleus and cytoplasm. The cytoplasm from B. napus showed a stronger disturbing effect than that of B. juncea, suggesting that B. carinata might be genetically closer to B. juncea than to B. napus. The significant difference in the alloplasmic effect of the cytoplasms of B. napus and B. juncea also suggests that in B. carinata the B genome may play a greater role than the C genome.
An erratum to this article can be found at 相似文献