全文获取类型
收费全文 | 328篇 |
免费 | 3篇 |
国内免费 | 2篇 |
专业分类
林业 | 23篇 |
农学 | 16篇 |
基础科学 | 1篇 |
74篇 | |
综合类 | 24篇 |
农作物 | 14篇 |
水产渔业 | 20篇 |
畜牧兽医 | 130篇 |
园艺 | 2篇 |
植物保护 | 29篇 |
出版年
2023年 | 1篇 |
2022年 | 7篇 |
2021年 | 15篇 |
2020年 | 3篇 |
2019年 | 3篇 |
2018年 | 7篇 |
2017年 | 6篇 |
2016年 | 9篇 |
2015年 | 9篇 |
2014年 | 12篇 |
2013年 | 22篇 |
2012年 | 19篇 |
2011年 | 21篇 |
2010年 | 12篇 |
2009年 | 11篇 |
2008年 | 26篇 |
2007年 | 21篇 |
2006年 | 25篇 |
2005年 | 14篇 |
2004年 | 20篇 |
2003年 | 25篇 |
2002年 | 16篇 |
2001年 | 9篇 |
2000年 | 4篇 |
1999年 | 5篇 |
1998年 | 4篇 |
1997年 | 2篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1989年 | 1篇 |
排序方式: 共有333条查询结果,搜索用时 15 毫秒
321.
322.
323.
324.
Yoshinori TAKAMI Hitoshi KOIEYAMA Nobuo SASAKI Takumi IWAI Youki TAKAKI Takehiro WATANABE Yasutsugu MIWA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(3):435
Urolithiasis is a disease often seen in tortoises at veterinary hospitals, however there have been no comprehensive research reports of tortoises with urolithiasis in Japan. In this study, we analyzed tortoises diagnosed with urolithiasis at three domestic veterinary hospitals. Based on medical records, we assessed the diagnostic method, species, sex, body weight, dietary history, husbandry, clinical signs, clinical examination, treatment for urolithiasis, and clinical outcome. The total number of cases in the 3 facilities was 101. As for species of tortoises, the most common was the African spurred tortoise (Centrochelys sulcata) with 42 cases (41.6%), followed by the Indian star tortoise (Geochelone elegans) with 30 cases (29.7%). Six other species were confirmed to have calculi. Almost all cases (99 cases, 98%) had a single calculus, and only 2 had multiple calculi. The prevalence of urolithiasis for the total number of tortoises having visited to one institution during the same period was 5.1%. Of the 86 cases that underwent calculi removal, 64 (74.4%) were successfully removed via the vent, and the efficacy of this method was confirmed. Nineteen cases (22%) were approached via plastronotomy, among which only 2 died postoperatively. In this study, we could not clarify the relationship between calculi formation and diets or other husbandry factors. 相似文献
325.
Inhibiting spontaneous light emission and redistributing the energy into useful forms are desirable objectives for advances in various fields, including photonics, illuminations, displays, solar cells, and even quantum-information systems. We demonstrate both the "inhibition" and "redistribution" of spontaneous light emission by using two-dimensional (2D) photonic crystals, in which the refractive index is changed two-dimensionally. The overall spontaneous emission rate is found to be reduced by a factor of 5 as a result of the 2D photonic bandgap effect. Simultaneously, the light energy is redistributed from the 2D plane to the direction normal to the photonic crystal. 相似文献
326.
Haruhiko Hino Takashi Kitagawa Takayuki Matsumoto Yoshinori Aoki Shingo Kimura 《Fisheries Oceanography》2019,28(4):359-371
Vertical movements related to the thermoregulation were investigated in 12 juvenile bigeye tuna (Thunnus obesus) in Japanese waters using archival tag data. Movements changed with time of day, season, and body size. During daytime, bigeye tuna descended to greater depths, presumably to feed in the deep scattering layer (DSL). Thereafter, they repeatedly ascended to shallower layers, suggesting attempts at behavioral thermoregulation, although the beginning of vertical thermoregulatory ascents might reflect a shift in DSL depth. By the end of such movement, the whole‐body heat‐transfer coefficient might decrease because, although the depth and ambient temperature of the upper layers did not change, the body temperature gradually decreased significantly just after ascent for thermoregulation. Seasonal patterns indicated that the vertical thermal structure of the ocean might influence this ascent behavior. For example, from January to May, bigeye tuna made fewer ascents to less shallow waters, suggesting that they respond to increasing depths of the mixed surface layer by reducing energy expenditure during vertical migration. In addition, as body size increased, fewer thermoregulatory ascents were required to maintain body temperature, and fish remained deeper for longer periods. Thus, vertical thermoregulatory movements might change with body size as bigeye tuna develop better endothermic and thermoregulatory abilities. We hypothesize that bigeye might also increase cold tolerance as they grow, possibly due to ontogenetic shifts in cardiac function. 相似文献
327.
Genotypic variation in polyphenol content of barley grain 总被引:1,自引:0,他引:1
Masaya Fujita Kazuyoshi Takeda Noriko Kohyama Yoshinori Doi Hitoshi Matsunaka 《Euphytica》2002,124(1):55-58
The polyphenol content in pearl barley, which is highly correlated to a browning reaction after heat treatment, was investigated
using 1,347 cultivated barley varieties (H. vulgare) and two wild accessions (H. vulgare subsp. spontaneum) collected from different areas of the world. The polyphenol content in the cultivated barley shows a wide variation ranging
from 0.19 to 0.75 mg/g with a nearly normal frequency distribution. The polyphenol content in the hulless varieties from Japan
and Korea was low. On the other hand, the polyphenol content in wild barley was about two times higher than the average value
recorded in cultivated barley. Based on HPLC analysis, five lowest-polyphenol content local varieties do not represent proanthocyanidin-free
mutants.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
328.
Starch properties are major determinants of grain quality and food characteristics in rice (Oryza sativa L.). Control of starch properties will lead to the development of rice cultivars with desirable characteristics. We performed quantitative trait locus analysis and detected a putative region on chromosome 2 associated with phenotypic variation of starch properties in two glutinous rice varieties developed in the Hokkaido region of Japan: ‘Kitayukimochi’, which has a low pasting temperature and creates soft rice cakes, and ‘Shirokumamochi’, which has a high pasting temperature and creates hard rice cakes. Starch branching enzyme IIb (SbeIIb) was identified as a candidate gene within the region. Sequence analysis of SbeIIb in parental lines identified two single-nucleotide polymorphisms (SNPs) with non-synonymous mutations in the coding region of the ‘Shirokumamochi’ genotype (SbeIIbsr). We genotyped over 100 rice cultivars, including 28 rice varieties in the Honshu region of Japan, using the CAPS marker, which was designed using one of the SNPs. However, SbeIIbsr was not found in rice cultivars in Honshu. Distribution analysis indicated that SbeIIbsr was introduced to the rice breeding population in Hokkaido from the American variety ‘Cody’ via the Hokkaido cultivar ‘Kitaake’. As a result, SbeIIbsr was distributed only in progenies of ‘Kitaake’. 相似文献
329.
Wataru YAMAMOTO Yasuhiro ITANO Tsunefumi KOBAYASHI Daishiro MIURA Yoshinori KASAHARA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2016,78(1):77-82
Human immunoglobulin G (IgG) concentrates are immune-modulating,anti-inflammatory plasma-derived products. Clinical studies in recent years have suggestedthat IgG attenuates neuropathic pain. In this study, effects of sulphonated IgG on thedevelopment and maintenance of a mechanical allodynia-like response were examined in micewith neuropathic pain induced by a partial sciatic nerve ligation (PSL). When sulphonatedIgG (400 or 1,000 mg/kg/day, i.p.) was administered for 5 days, from 1 day before surgeryto post-operative day (POD) 3, the development of a mechanical allodynia-like response wasattenuated. On the other hand, sulphonated IgG had little effect on the maintenance of amechanical allodynia-like response when administered for 5 days, from POD 11 to POD 15, atwhich time a mechanical allodynia-like response had already been developed. To explore themechanism of sulphonated IgG, the mRNA expression of inflammatory cytokines was evaluatedin the injured sciatic nerve. Sulphonated IgG (1,000 mg/kg/day, i.p.) that wasadministered for 3 days, from 1 day before surgery to POD 1, significantly attenuated theup-regulation of tumor necrosis factor-α and monocyte chemotactic protein-1 mRNAs on POD1. These results suggest that prophylactic treatment with sulphonated IgG attenuates thedevelopment of mechanical allodynia-like response by inhibition of inflammatory cytokineexpression in mice with PSL. 相似文献
330.
Kazumasa Murata Yukihide Iyama Takuya Yamaguchi Hidenobu Ozaki Yoshinori Kidani Takeshi Ebitani 《Breeding Science》2014,64(4):273-281
The appearance of brown rice grown under high temperature conditions is an important characteristic for improvement in Japanese rice breeding programs. We performed a QTL analysis of the appearance quality of brown rice using chromosome segment substitution lines of the indica cultivar ‘Habataki’ in the ‘Koshihikari’ genetic background. A line carrying a ‘Habataki’ segment on chromosome 7 showed a high percentage of perfect grains produced under high temperature conditions during the ripening period. To verify the role of this segment, and to narrow down the region containing the useful allele, substitution mapping was performed using multiple paired lines. As a result, the chromosomal location of a gene that we named Appearance quality of brown rice 1 (Apq1) was delimited to a 48-kb region. In addition, we developed an Apq1-near isogenic line (NIL) to evaluate the effect of Apq1 on various agronomic traits. Under high temperature conditions during the ripening period, the Apq1-NIL produced significantly higher percentages of perfect grains than ‘Koshihikari’. Other agronomic traits, including yield and palatability, were similar between the Apq1-NIL and ‘Koshihikari’. Therefore, the ‘Habataki’ allele of Apq1 will be useful in breeding programs aimed at improving the quality of grains ripened under high temperature conditions. 相似文献