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排序方式: 共有161条查询结果,搜索用时 15 毫秒
41.
Kamemori N Takeuchi T Sugiyama A Miyabayashi M Kitagawa H Shimizu H Ando K Harada E 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2008,70(3):313-315
The transportation of intravenously administered bovine lactoferrin (bLF) into the cerebrospinal fluid (CSF) was immunohistochemically investigated in adult rats. Administered bLF was detected in the vesicular membranes of endothelial cells in cerebral blood vessels 10 min after the infusion. Numerous immunoreactive small vesicles were also detected at the ependymal cells in the choroid plexus. Moreover, the bLF concentration in the CSF was significantly increased at 1-2 hr after the intravenous infusion of bLF (10 or 30 mg/kg). These findings clearly demonstrate that LF is possibly transported into the brain matter even in adult animals. 相似文献
42.
Review of population dynamics and management of small pelagic fishes around the Japanese Archipelago
Fisheries Science - Population dynamics of small pelagic fishes (SPF) and their management in Japan were reviewed for Japanese sardine Sardinops melanostictus, Japanese anchovy Engraulis japonicus,... 相似文献
43.
44.
Hiroyuki Ikeda Akihiko Kamoshita Junko Yamagishi Makara Ouk Bunna Lor 《Paddy and Water Environment》2008,6(1):91-103
In order to assess direct seeding of rice technology to cope with future agricultural labor shortage in Cambodia, agronomic
experiments were conducted in 2005 and 2006 to compare direct seeding with transplanting under three water conditions (non-flooded,
shallow flooded, and deep flooded conditions) with/without weed control by herbicides (bentazone and cyhalofop-butyl) for
two Cambodian rice varieties (shorter stature and early maturity Sen Pidao, taller stature and longer maturity Phka Rumduol).
Average rice yield in 2 years was lower in direct seeding (341 g m−2) than transplanting (404 g m−2), but interaction components with year, varieties, water conditions, and weed management were significant, and the attained
maximum yield of direct seeding (510 and 464 g m−2 for Phka Rumduol variety in shallow flooded condition with weeding in 2005 and 2006, respectively) was similar to that of
transplanting. Plant length and dry weight of rice were reduced in non-flooded and deep flooded conditions compared with shallow
flooded condition, and grain yield was the highest in shallow flooded condition. Yield advantage of Phka Rumduol over Sen
Pidao increased under direct seeding, particularly under non-flooded conditions in 2005 because weed infestation was more
suppressed in Phka Rumduol even without weeding. Increase in 100 g m−2 of weed infestation prior to heading (dry weight basis) reduced about 20% of attainable yield with weed control. This study
identified importance of stature and growth duration of rice varieties and presence of standing water as well as the weed
control, in order to develop and extend direct seeding in the Cambodia. 相似文献
45.
Tetsuro Shiraishi Kumiko Okamoto Michio Yoneda Takeshi Sakai Seiji Ohshimo Shizumasa Onoe Akihiko Yamaguchi Michiya Matsuyama 《Fisheries Science》2008,74(5):947-954
The age and growth of chub mackerel Scomber japonicus collected from the East China Sea and the northern waters off Kyushu between June 2000 and June 2001 were determined by observing
the otolith surface after dipping it in xylene. The translucent and opaque zones on the otolith surface were identified, and
the number of translucent zones was counted. Monthly changes in the frequency of fish with translucent zones on the otolith
margin, and in the marginal increments, indicated that the translucent zones were formed between April and June. The seasonal
pattern of annulus formation on the otolith became clear by observing the otoliths of fish with known ages, and the otolith
formation in wild fish was consistent with that of fish with known ages. The mean gonadosomatic index of male and female fish
was high from March to May, and spawning females were observed from mid-March to mid-May. The estimated ages were 1–5 years
for males and 1–6 years for females. The von Bertalanffy growth parameters did not significantly differ between male and female.
The model was obtained as FL
t=406×{1−exp[−0.372×(t+1.68)] 相似文献
46.
The aim of this study was to determine whether the population of lymphocytes expressing CD4 and CD8 molecules changed in the white follicles during atresia in chickens. Frozen sections of healthy, early atretic, advanced atretic and late atretic follicles were immunostained for CD4 and CD8, and the populations of positive cells were analyzed under a light microscope. In the healthy, early atretic and advanced atretic follicles both CD4+ and CD8+ cells were localized in the theca layer, but not in the granulosa layer. However, an influx of CD4+ and CD8+ cells was observed not only in the theca but also in the follicular cavity that was formed by disintegration of the oocyte in late atretic follicles. The frequency of CD4+ T cells in the theca layer did not differ among healthy, early atretic and advanced atretic follicles, but was significantly increased in the late atretic follicles (P < 0.05). The frequency of CD8+ cells showed a pattern of change that resembled that of CD4+ T cells, with a significantly greater population in late atretic follicles than the other follicles (P < 0.05). These results suggest that CD4+ and CD8+ cells are increased in the late atretic follicles, probably to promote the tissue regression. 相似文献
47.
Ai Maeno Yoshimitsu Sakamoto Motoki Hojo Yukie Tada Jin Suzuki Akiko Inomata Takako Moriyasu Akihiko Hirose Noriko Kemuriyama Katsuhiro Miyajima Dai Nakae 《Journal of toxicologic pathology》2021,34(4):353
Zymbal’s gland neoplasms are induced in rats through the administration of various carcinogens, but spontaneous neoplasia is rare. This report describes a spontaneous Zymbal’s gland carcinoma with lung metastasis found in an aged male Fischer 344 rat. Macroscopically, the dome-like tumor nodule, approximately 30 mm in diameter with ulceration, was located near the ear canal of the rat. No healthy tissue or structure of Zymbal’s gland was identified on the corresponding side, while the normal salivary glands and a lacrimal gland were observed. Histologically, a large part of the tumor mass was occupied by poorly differentiated neoplastic cells, the shapes of which were oval to polygonal or fusiform. Additionally, clusters of sebaceous-like foamy cells and squamous metaplasia with prominent keratinization were observed. Tumor cells were found to metastasize to the lung; these cells displayed histological similarities, including a sebaceous gland-like pattern, to those in the primary site. The tumor cells were immunohistochemically positive for cytokeratin AE1/AE3 or vimentin but negative for CD68, S100, α-smooth muscle actin, von Willebrand factor, and desmin. Our results indicate that the tumor was a poorly differentiated Zymbal’s gland carcinoma with lung metastasis. 相似文献
48.
49.
Ryuta Kawasaki Akinori Azumano Miya Ueda Souhei Tanaka Aya Yokota Kazuo Katoh Akihiko Hagino 《Animal Science Journal》2014,85(10):910-914
We analyzed the urinary excretion of glucose and N‐acetyl‐β‐D‐glucosaminidase (NAG) in six okapis (Okapia johnstoni) in captivity to investigate the cause of their urinary sugar excretion. The urinary glucose‐positive okapi had significantly higher urinary NAG indices than the urinary glucose‐negative okapi. There was also a positive correlation between urinary glucose levels and urinary NAG indices. These results suggest that the proximal tubular function of the glycosuric okapi may have been obstructed, which impaired glucose reabsorption. 相似文献
50.
Daniel S. Moura Francisco J. Zapata-Arias Akihiko Ando Augusto Tulmann Neto 《Euphytica》1997,94(1):01-05
A plant regeneration system from rice protoplasts using calli derived from mature embryos was established for the two Brazilian
modern rice cultivars IAC-201 and IAC-165. After 30 to 40 days of in vitro culture it was possible to obtain on average 6
million protoplasts per gram of callus. Microscopic selection of embryogenic calli was a key step for protoplast isolation.
The production of embryogenic calli increased when L-proline and casein hydrolysate were used in the callus induction medium.
The Oc or IR52 nurse cell lines were essential for protoplast division. Different regeneration media were studied and 139
plants were regenerated which set seed. Some of the regenerated plants showed morphological variation such as the presence
of awns in spite of the short time of the in vitro culture.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献