全文获取类型
收费全文 | 458篇 |
免费 | 8篇 |
国内免费 | 3篇 |
专业分类
林业 | 17篇 |
农学 | 11篇 |
基础科学 | 1篇 |
108篇 | |
综合类 | 13篇 |
农作物 | 6篇 |
水产渔业 | 30篇 |
畜牧兽医 | 248篇 |
园艺 | 1篇 |
植物保护 | 34篇 |
出版年
2023年 | 1篇 |
2022年 | 1篇 |
2021年 | 34篇 |
2020年 | 14篇 |
2019年 | 5篇 |
2018年 | 5篇 |
2017年 | 3篇 |
2016年 | 11篇 |
2015年 | 31篇 |
2014年 | 36篇 |
2013年 | 35篇 |
2012年 | 20篇 |
2011年 | 30篇 |
2010年 | 17篇 |
2009年 | 17篇 |
2008年 | 32篇 |
2007年 | 29篇 |
2006年 | 29篇 |
2005年 | 33篇 |
2004年 | 20篇 |
2003年 | 23篇 |
2002年 | 21篇 |
2001年 | 10篇 |
2000年 | 3篇 |
1999年 | 1篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1977年 | 1篇 |
1953年 | 1篇 |
排序方式: 共有469条查询结果,搜索用时 484 毫秒
1.
2.
Minimal Set of Metabolic Pathways Suggested from the Genome of Onion Yellows Phytoplasma 总被引:1,自引:0,他引:1
3.
Takeshi SHINOGI Tomoko SUZUKI Yoshihiro NARUSAKA Pyoyun PARK 《Journal of General Plant Pathology》2002,68(1):38-45
The rapid generation of reactive oxygen species (ROS), called the oxidative burst, is one of the earliest host responses to
pathogen infection or elicitor treatments. Therefore, we looked for the induction of ROS generation in Japanese pear leaves
by the host-specific toxin, AK-toxin I using a cytochemical method for detecting H2O2. A small amount of non-specific generation of H2O2 was found in the cell walls in toxin- and water-treated susceptible and resistant leaves. Thus, the generation of H2O2 at cell walls appears to be caused by wounding stress during sampling. Specific generation of ROS, however, was found only
in the membrane fragments and extended desmotubules characteristic of modified sites of the plasma membrane in the toxin-treated
susceptible leaves. In addition, generation of H2O2 at plasma membranes was observed with higher frequency in toxin-treated susceptible leaves. This result indicates that the
H2O2 generation was associated with damaged sites in the plasmalemma after toxin treatment and perhaps with the formation of membrane
fragments from altered portions of the invaginated plasma membrane.
Received 21 September 2001/ Accepted in revised form 25 October 2001 相似文献
4.
Chie SUZUKI Yosuke SAKAGUCHI Hiroyoshi HOSHI Koji YOSHIOKA 《The Journal of reproduction and development》2016,62(1):79-86
The effects of lipid-rich bovine serum albumin (LR-BSA) on the development of porcine blastocysts produced
in vitro were examined. Addition of 0.5 to 5 mg/ml LR-BSA to porcine blastocyst medium
(PBM) from Day 5 (Day 0 = in vitro fertilization) significantly increased the hatching rates
of blastocysts on Day 7 and the total cell numbers in Day-7 blastocysts. When Day-5 blastocysts were cultured
with PBM alone, PBM containing LR-BSA, recombinant human serum albumin or fatty acid-free BSA, addition of
LR-BSA significantly enhanced hatching rates and the cell number in blastocysts that survived compared with
other treatments. The diameter, ATP content and numbers of both inner cell mass and total cells in Day-6 and
Day-7 blastocysts cultured with PBM containing LR-BSA were significantly higher than in blastocysts cultured
with PBM alone, whereas LR-BSA had no effect on mitochondrial membrane potential. The mRNA levels of enzymes
involved in fatty acid metabolism and β-oxidation (ACSL1, ACSL3,
CPT1, CPT2 and KAT) in Day-7 blastocysts were
significantly upregulated by the addition of LR-BSA. The results indicated that LR-BSA enhanced hatching
ability and quality of porcine blastocysts produced in vitro, as determined by ATP content,
blastocyst diameter and expression levels of the specific genes, suggesting that the stimulatory effects of
LR-BSA arise from lipids bound to albumin. 相似文献
5.
6.
Tamura S Tamura Y Ohoka A Hasegawa T Uchida K 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2007,69(12):1313-1315
An 11-year-old female miniature schnauzer was tentatively diagnosed with the skull base meningioma, based on several examinations. Because surgical treatment was difficult, and outpatient radiation therapy was not available in the local area, chemotherapy with hydroxyurea combined with dexamethasone was selected. The patient's clinical symptoms improved after one week of treatment, and the tumor size was obviously reduced on MRI performed 37 days after treatment began. The patient received hydroxyurea for 7 months, with symptoms remaining stable, and the tumor re-increased to almost the same size at 7 months as that at the initial examination. At that time, hydroxyurea was discontinued. The patient died from pulmonary edema 14 months after treatment began. Pathologically, the tumor was diagnosed as a meningioma. 相似文献
7.
生物质资源高压连续输送的研究 总被引:1,自引:0,他引:1
建立了近中试规模的生物质资源高压连续输送装置,通过将生物质资源与水混成浆料的方法实现了生物质资源的高压连续输送、浆料的固含量可达10%(wt)以上,压力可达40MPa,最大浆料供应量为2.4L/h。 相似文献
8.
TOSHISADA SUZUKI IZUMI USUI KAORI TOMITA-YOKOTANI SHINYA KONO HIROKAZU TSUBURA YOICHI MIKI KOJI HASEGAWA 《Weed Biology and Management》2001,1(4):226-230
The effects of acid extracts of tomato ( Lycopersicon esculentum Mill.) and carrot ( Daucus carota L.) juice wastes from the food industry on the growth of five species of crops and four weeds were examined. The acid extract of the tomato juice waste promoted the shoot and root growth of tomato, Chinese cabbage, corn, and radish, but not the growth of oat seedlings. The extract did not promote the shoot growth of weeds tested, and it inhibited the root growth of the weeds that included barnyardgrass ( Echinochloa oryzicola Ohwi), southern crabgrass ( Digitaria ciliaris Koel.) and Japanese barnyard millet ( Echinochloa utilis Ohwi). The carrot juice waste was also examined as another waste from the food industry. The effect of the acid extract of carrot juice waste showed significant promoting effects on the root growth of Chinese cabbage; however, the effects on other plants were lower than that of tomato juice waste. It also did not inhibit the growth of weeds. These results suggested that the acid extract from tomato juice waste is useful as plant-growth substances because they have a promoting effect on the shoot and root growth of crops, and an inhibitory effect on the root growth of some weeds. 相似文献
9.
Suzuki M Uchida K Taniguchi K Yamaguchi R Tateyama S 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2003,65(2):271-274
A 2-year-old Labrador Retriever developed atrophy of the right temporal muscle, subsequently showed generalized seizure and died 2 months after the clinical onset. Postmortem examination revealed the tumor masses in the right mandibulopharyngeal area, nasopharynx and intracranial space. Histopathologically, these tumor masses were composed of small round neoplastic cells and neuropil-like stroma separated by fibrovascular septa. In the neoplastic masses, small neoplastic cells with round to oval hyperchromatic nuclei and scanty cytoplasm predominated, and angulated neoplastic cells with larger nuclei and moderate cytoplasm were scattered. Immunohistochemically, neoplastic cells were positive for neuron specific enorase, neurofilament protein, chromogranin A, synaptophysin and tyrosine hydroxylase. Based on these findings, this case was diagnosed as peripheral neuroblastoma, presumably originated from the sympathetic ganglion, maybe right craninal cervical ganglion. 相似文献
10.
Suzuki M Uchida K Morozumi M Hasegawa T Yanai T Nakayama H Tateyama S 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2003,65(11):1233-1239
Canine necrotizing meningoencephalitis (NME) and granulomatous meningoencephalomyelitis (GME) were compared pathologically. Gross observation exhibited lateral ventricular dilation and discoloration, malacia and/or cavitation of the cerebrum in NME. On the contrary, gross changes were milder in GME, except for occasional visible granulomatous mass formation. Histopathologically, the lesions of NME were distributed predominantly in the cerebral cortex and various degrees of inflammatory and necrotic changes were observed according to clinical stages. Besides, microscopic lesions of GME were mainly distributed in the white matter of the cerebrum, cerebellum and brainstem, which are characterized by perivascular cuffing, multiple granulomas and leptomeningeal infiltrates. Although macrophages and lymphocytes were predominant in the inflammatory lesions of both disorders, macrophages in GME transformed into epithelioid cells and exhibited more massive infiltration. Although lectin RCA-1-reactive cells were numerous in both disorders, lysozyme immunoreactive cells in NME were fewer than that in GME. Parenchymal infiltration of MAC387-positive cells was common in GME and limited in NME. The number of CD3-positive lymphocytes in the GME lesions tended to be greater than in NME, though the difference was not statistically significant. Morphological and immunohistochemical differences of the lesions, in particular, the characteristics of infiltrative macrophages may reflect these different pathogeneses of the two disorders. 相似文献