全文获取类型
收费全文 | 237篇 |
免费 | 0篇 |
国内免费 | 1篇 |
专业分类
林业 | 15篇 |
农学 | 1篇 |
13篇 | |
综合类 | 9篇 |
水产渔业 | 24篇 |
畜牧兽医 | 143篇 |
植物保护 | 33篇 |
出版年
2022年 | 15篇 |
2021年 | 19篇 |
2019年 | 2篇 |
2016年 | 2篇 |
2015年 | 23篇 |
2014年 | 16篇 |
2013年 | 6篇 |
2012年 | 15篇 |
2011年 | 7篇 |
2010年 | 13篇 |
2009年 | 11篇 |
2008年 | 13篇 |
2007年 | 13篇 |
2006年 | 12篇 |
2005年 | 10篇 |
2004年 | 17篇 |
2003年 | 10篇 |
2002年 | 15篇 |
2001年 | 2篇 |
2000年 | 5篇 |
1998年 | 1篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1993年 | 2篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1987年 | 2篇 |
1963年 | 1篇 |
1955年 | 1篇 |
排序方式: 共有238条查询结果,搜索用时 0 毫秒
81.
Mitsutoshi Nagase Kazuhiko Maeta Tadanori Aimi Katsuaki Suginaka Tsutomu Morinaga 《Fisheries Science》2009,75(3):811-816
Nucleotide sequence and polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP) analysis of the 3′-portion
of the mitochondrial 16S RNA gene (rDNA) coding sequence were used to differentiate between flying fishes and other fishes
that are frequently used in ago-noyaki production. In this study, we successfully distinguished between flying fishes and the other fishes by combining amplified
DNA fragments with universally designed primers and digesting the PCR products with AfaI and MfeI restriction endonucleases. PCR-RFLP of 15 ago-noyaki, 2 noyaki, and 8 other processed flying-fish products were analyzed to authenticate flying-fish content among processed seafood products.
After digestion of the PCR products with both enzymes, we found that all ago-noyaki and processed flying fish products contained either two or three DNA fragments of ~200, 300, and 530 bp, and noyaki samples (which do not contain flying fish) contained only one fragment of ~530 bp. Here, we present a new procedure to confirm
the content of flying-fish meal in ago-noyaki. 相似文献
82.
Katsuji UETAKE Shigeru MORITA Yoshiko KOBAYASHI Shinji HOSHIBA Toshio TANAKA 《Animal Science Journal》2003,74(1):73-78
Calves (n = 106) on four dairy farms were observed for their approachability to humans. All calves experienced similar rearing conditions: Beginning individual pen, after birth until weaning at about 2 months, where they were housed individually and fed milk and a milk replacement; Late individual pen, after weaning until grouping at about 3.5 months, where they were housed individually and fed hay, silage and concentrate feed; Beginning group pen, after grouping until 5 months, where they were housed in groups of 2–5 animals and fed hay, silage and concentrate feed; later group pen, from 5 to 7 months. The number of calves that contacted an experimenter who stood in front of their pens for 10 min was recorded on 6 separate days over 3 months. Latency to touch and time spent in activities during touching such as sucking, licking, biting and rubbing were also measured. There were no significant differences in the latency to touch and the ratio of touch to non‐touch calves between the rearing conditions and the farms. The time spent touching was significantly affected by the interaction between the rearing condition and the farm (P < 0.01). In detail, the time spent sucking (P < 0.001) and licking (P < 0.01) was different between the rearing condition × farm variables. The proportion of calves that approached and touched the experimenter tended to be higher in the farms in which a stockperson worked longer inside and outside their pens (both ρ = 0.95, P = 0.051). These results were interpreted according to the perspectives of early positive reinforcement with food and the habituation process to humans existing nearby. 相似文献
83.
CHIAKI IMADA YUKO IKEMOTO TAKESHI KOBAYASHI NAOKO HAMADA ETSUO WATANABE 《Fisheries Science》2002,68(2):395-402
ABSTRACT: Protoplast fusion between different species of Streptomyces was performed using a liquid regeneration method developed for a rapid and simple preparation of the fusants. Consequently, new clones, which could not be obtained using the conventional agar regeneration method, were obtained. In the crosses between S. griseus and S. durhamensis , and between S. californicus and S. catenulae , eight and two recombinants, respectively, were obtained using the liquid regeneration method. Conversely, in the case of crosses between S. ornatus and S. catenulae , and between S. ornatus and S. vendargensis , seven recombinants each were obtained using only the agar method. The physiological characteristics, such as the assimilation of carbohydrate and antibiotic resistance, of these fusants differed considerably from those of their parental strains. Using the proposed liquid regeneration method, a simpler and quicker procedure for protoplast fusion is described. 相似文献
84.
Noriyuki HORIUCHI Makoto KOMAGATA Keiichi SHITAMURA Shiori CHIBA Kotaro MATSUMOTO Hisashi INOKUMA Takane MATSUI Yoshiyasu KOBAYASHI 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(6):729-732
An 11-year-old Holstein-Friesian cow exhibited anorexia and jaundice. A large mass was
found in the liver during necropsy. Macroscopically, the mass was composed of dark red
multilobular tissue and a centrally located abscess, which was connected to the hepatic
duct. Histologically, the mass consisted of proliferation of small neoplastic cells and
was demarcated from the hepatic parenchyma by a thick region of granulation tissue. The
neoplastic cells were predominantly arranged in solid sheets, but they also formed
blood-filled cancellous structures, and proliferating foci were seen around blood vessels.
Periodic acid-Schiff reaction demonstrated that a fine basement membrane-like structure
surrounded the neoplastic cells. Immunohistochemically, the neoplastic cells were positive
for vimentin and alpha smooth muscle actin and negative for cytokeratin, factor
VIII-related antigen, chromogranin and desmin. Based on its histopathological features,
the hepatic neoplasm was diagnosed as a primary glomus tumor. This is the first report
about a primary glomus tumor of the liver in a cow. 相似文献
85.
Yuka KOJIMA Shiori CHIBA Noriyuki HORIUCHI Yoshiyasu KOBAYASHI Hisashi INOKUMA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(5):605-607
S100B in cerebrospinal fluid (CSF-S100B) was measured in calves with 20 neurologic and 21
non-neurologic diseases to clarify its utility as a biomarker for neurologic diseases. The
median CSF-S100B value in the neurologic disease group (43.0
ng/ml) was significantly higher than that in the
non-neurologic disease group (10.2 ng/ml). As CSF-S100B
levels in calves with neurologic diseases widely differed, the utility of CSF-S100B as a
diagnostic marker for neurologic diseases in cattle remains inconclusive. 相似文献
86.
Noriyuki HORIUCHI Daishiro KUMAGAI Kotaro MATSUMOTO Hisashi INOKUMA Hidefumi FURUOKA Yoshiyasu KOBAYASHI 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(10):1281-1283
Bovine dilated cardiomyopathy (DCM) is an autosomal recessive genetic disorder causing
congestive heart failure and subsequent death. Recently, a nonsense mutation c.343C>T
in the bovine optic atrophy 3 (OPA3) gene had been reported to cause the DCM in Holstein
cattle in Switzerland. However, the mutation has not been confirmed in bovine DCM outside
Switzerland. Nine Holstein Friesian cows that were macroscopically and histologically
diagnosed with or suspected of DCM and 12 control cows kept in Japan were tested for the
mutation. The mutation surrounding OPA3 DNA fragment was amplified by PCR and subjected to
direct sequences. The homogeneous c.343C>T mutation was proved to occur in all the
affected cows and not in the control cows. The present study is the first report of the
mutation in the DCM affected cows outside Switzerland. 相似文献
87.
Naoaki YAMADA Takashi KITAMORI Fumiyo KITAMORI Kanako ISHIGAMI Koji IWANAGA Taiki ITOU Ryosuke KOBAYASHI Shino KUMABE Takuya DOI Junko SATO Yumi WAKO Minoru TSUCHITANI 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(10):1299-1303
A 7-year-old female boxer dog died suddenly without any clinical signs. It was suspected
that the dog had arrhythmogenic right ventricular cardiomyopathy (ARVC) due to ventricular
premature complexes and ventricular tachycardia at 3 years of age. The final diagnosis of
ARVC was confirmed by histological characteristics, such as loss of cardiocytes and
fibrofatty replacement, occurring in the right and left ventricular walls. In the
cardiocytes, non-lipid vacuoles were observed. Cardiac fibrosis and intimal thickening of
the small arteries occurred without fatty replacement in the inner muscle layer including
the papillary muscles of the left ventricular wall. This paper describes the
pathomorphological details of an ARVC case with coincidental cardiac fibrosis in the inner
muscle layer of the left ventricular wall. 相似文献
88.
Yoshihiro KOBAYASHI Tetsushi HIRANO Takuya OMOTEHARA Rie HASHIMOTO Yuria UMEMURA Hideto YUASA Natsumi MASUDA Naoto KUBOTA Kiichi MINAMI Shogo YANAI Mitsuko ISHIHARA-SUGANO Youhei MANTANI Toshifumi YOKOYAMA Hiroshi KITAGAWA Nobuhiko HOSHI 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(11):1355-1361
89.
Masaki MAEZAWA Ken-ichi WATANABE Kotaro MATSUMOTO Yoshiyasu KOBAYASHI Haruko OGAWA Hisashi INOKUMA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(6):898
Enzootic bovine leukosis (EBL) is typically observed in cattle over 3 years old. However, some cases of EBL onset in young beef cattle have been reported in Japan. The mechanism for early EBL onset is unclear. In Japan, beef cattle are given large amounts of concentrated feed with low vitamin A. Bone morphogenetic proteins (BMPs) are regulators of cell proliferation, differentiation, and apoptosis, and thought to represent one of the key players in tumor malignancy. The purpose of this study was to evaluate the differences in BMP-6 methylation status between EBL beef cattle under 3 years old and other cattle. We investigated the methylation status of the BMP-6 promoter region in 32 EBL beef cattle under 3 years old. We also compared the methylation status of EBL dairy cattle to that of healthy cattle. Median methylation rate of the BMP-6 promoter region in EBL beef cattle under 3 years old was 8.9%, which was significantly higher than that of other groups. Hypermethylation of the BMP-6 promoter region might contribute to early onset of EBL in beef cattle under 3 years old, and animal feeding management practices specific to beef cattle may affect the methylation status of the BMP-6 promoter region. 相似文献
90.
For the development of effective procedures to control invasive plants, it is necessary to learn about their mechanism of spread, for which an understanding of the plant's genetic variation may be important. Sicyos angulatus is a widespread and invasive weed that grows among forage crops and natural vegetation in Japan. Inter-simple sequence repeat (ISSR) genotyping was used to detect the regional patterns of genetic variation of S. angulatus in its introduced range in Japan. The goal of this research was to assess the introduction dynamics and mechanism of spread of S. angulatus in Japan. Four screened ISSR primers produced 15 reliable bands, and 12 of these were polymorphic among six areas in central and north-eastern Japan. The analysis of molecular variance ( amova ) revealed that 88.4% of genetic variation occurred within areas rather than between the two regions (1.1%), or among areas within regions (10.5%). While the total gene diversity among areas ( Ht ) was 0.1684, the coefficient of gene differentiation was low among two geographically distinct regions ( Gst = 0.053). The genetic diversity indices ( h = 0.116; I = 0.173) of the Fuji river area, assumed to be near the first introduction site, were not higher than other areas (total h = 0.165; total I = 0.263). In contrast, those of the Chikuma river and Tenryu river areas were relatively high ( h = 0.173 and 0.187; I = 0.276 and 0.277 respectively). The Mantel test showed no significant correlation between geographical and genetic distances. These results suggest multiple introductions from the same gene pools into both central and north-eastern regions of Japan. 相似文献