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91.
Shimizu J Yamada K Kishimoto M Iwasaki T Miyake Y 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2008,70(7):659-663
The contrast effects of three different contrast media preparations (iohexol 180 mgI/ml, iohexol 240 mgI/ml and iotrolan 240 mgI/ml) in conventional and CT myelography were compared. Three beagle dogs were used and the study employed a cross-over method (total of 9) for each contrast media. The result of CT myelography showed that the contrast effect of iohexol (180 mgI/ml), which had low viscosity, was highest in cranial sites, and the contrast effect of high-viscosity iotrolan (240 mgI/ml) was highest in caudal sites 5 min after injection of the contrast media preparations. This shows that the diffusion of contrast media preparations in the subarachnoid space is influenced by viscosity. The results of conventional myelography also showed that the diffusion of contrast media preparations is influenced by viscosity. Therefore, it is important to identify the location of spinal lesions in veterinary practice, and low viscosity contrast medium preparation with wide spread contrast effects is considered suitable for myelography. 相似文献
92.
Kishimoto M Yamada K Seok JS Shimizu J Kobayashi Y Akiba Y Morishita Y Iwasa A Iwasaki T Miyake Y 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2008,70(9):981-983
Brain perfusion computed tomography (CT) scanning was performed in a mongrel dog and a golden retriever that were diagnosed with third ventricular tumor and olfactory bulb tumor, respectively, by contrast-enhanced CT. The tumors were pathologically diagnosed as ependymoma and meningioma, respectively. Perfusion CT results revealed that the ependymoma in this study had a lower blood flow, higher blood volume, and greater transit time of blood than the adjacent brain tissue. Further, the meningioma in this study had a higher blood flow, higher blood volume, and greater transit time of blood than the adjacent brain tissue. Perfusion CT can potentially be used for the grading of brain tumors and narrowing differential diagnosis, provided the perfusion CT data of animals are accumulated. 相似文献
93.
Seishiro CHIKAZAWA Yasutomo HORI Fumio HOSHI Kazutaka KANAI Naoyuki ITO 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(7):843-846
In the present study, we examined the relationship between serum ferritin concentration
before treatment and survival time in dogs with multicentric lymphoma. Eighteen dogs with
multicentric lymphoma were enrolled in the study. When the dogs were classified into high
and low ferritin groups on the basis of their serum ferritin concentration (3,000
ng/ml cut-off value), the median survival time of dogs
with high concentrations (≥3,000 ng/ml, n=7) was 40
days, whereas it was 360 days among dogs with low concentrations (<3,000
ng/ml, n=11). This difference was statistically
significant (P=0.001). This finding suggests that the initial high level
of serum ferritin indicates short survival time in dogs with multicentric lymphoma.
Large-scale research is necessary to confirm this finding. 相似文献
94.
Swimming performance of jack mackerel Trachurus japonicus (18.2 ± 0.8 cm fork length (FL), n = 185) was examined in a flume tank by measuring the stride length at low and high tail beat frequencies with electromyogram monitoring and a muscle twitch experiment. Stride length was analyzed by monitoring the tail beat frequency according to the swimming speed at different temperatures of 10, 15 and 22 °C. In the electromyographic observations, the initiation of ordinary muscle activity occurred between 71.4 and 99.6 cm/s, that is 3.7 to 5.3 FL/s, when the tail beat frequency was over 6 Hz. The swimming speeds increased rectilinearly with the tail beat frequency at each water temperature both for the low and high tail beat frequency. Lower stride length was observed at the lowest temperature (10 °C) tested. The forced swimming exercise significantly affected the muscle contraction time to become longer than the control fish, which indicated a reduction of the maximum swimming speed performance. 相似文献
95.
Kazutaka Kato 《Journal of Forest Research》2008,13(6):386-392
A trial to detect optimal pin-pricking timing in evaluating the ability to form traumatic resin canals (TRCs) of Cryptomeria japonica was examined to select resistant trees to Semanotus japonicus using 14 clones in 2001 and 2002. Resistance to S. japonicus and the ability to form TRCs in the phloem was evaluated by inoculating newly hatched larvae in the bark and by a pin prick,
which was conducted every 10 days (four times) on the trunk around the larval phloem-feeding period, respectively. The larval
survivorship varied greatly among clones for both years. The mean appearance of newly formed TRCs was generally higher in
late treatment for both years, and the tangential width of them was also higher in 2001, whereas those of pre-formed TRCs
were not higher for either year. The larval survivorship did not show significant correlations with the appearance and the
width of pre-formed TRCs on all treatments. However, it showed significant negative correlations with the appearance of newly
formed TRCs on the second and third treatments on the 2-year-old layer, although this was not significant with the width of
them. This suggests that resistant clones might have the mechanism of rapidly forming TRCs when just at the stage of newly
hatched larval entering the phloem. Thus, although the relationship between the appearance and the width of newly formed TRCs
is not clear, pin-pricking treatment when the newly hatched larvae just enter the bark may be one of optimal times for the
evaluation of the resistance of C. japonica to S. japonicus.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
96.
Synthesis and insecticidal activity of novel 1,3,4-oxadiazolin-5-one and pyrazolin-5-one derivatives
Kazuo Yagi Akira Numata Norihiko Mimori Toshiro Miyake Kazutaka Arai Shigeru Ishii 《Pest management science》1999,55(2):161-165
A series of novel 2-(2,4,6-trisubstituted phenyl)-1,3,4-oxadiazolin-5-one derivatives and 3-(2,4,6-trichlorophenyl)pyrazolin-5-one derivatives were synthesized and evaluated for insecticidal activity. It was found that a moderately bulky alkyl group, such as a tert-butyl group, on the heterocyclic ring, and a trifluoromethyl group on the benzene ring were optimal substituents on the molecule. The oxygen atom in the oxadiazoline ring was essential for insecticidal activity. Of the compounds assayed, 4-tert-butyl-2-(2,6-dichloro-4-trifluoromethylphenyl)-1,3,4-oxadiazolin-5-one gave the highest activity against Nephtotettix cincticeps, with an LC50 value of 0.51 mg litre−1. © 1999 Society of Chemical Industry 相似文献
97.
Yoshitaka Sakakura Tomohiro Takatani Junichi Nakayasu Hideki Yamazaki Kazutaka Sakiyama 《Fisheries Science》2017,83(2):191-197
We examined the effects of tetrodotoxin (TTX) administration on artificially raised tiger puffer Takifugu rubripes juvenile survival after release into a mesocosm with predators to clarify the ecological significance of TTX. Pellets containing three different concentrations of TTX [0 as the control, 7 and 14 mouse units (MU)/g diet] were fed to non-toxic artificially raised T. rubripes juveniles for 10 days. TTX accumulation in the various tissues of fish was detected except for in the control diet group. TTX administration did not affect survival or growth of the fish. One hundred fish from each diet group were released together after TTX administration into a salt pond mesocosm (2650 m2) with predators (Lateolabrax sp.) for 5 days. Survival after release was significantly higher in both the fish fed with the 7 MU TTX/g diet (62%) and the 14 MU TTX/g diet (74%) than in the control fish (32%). 相似文献
98.
Daisei Ando Kazutaka Shimoda Yoshihito Shinriki Hirokazu Urabe Tomoya Aoyama Masamichi Nakajima 《Fisheries Science》2010,76(5):761-767
Chum salmon Oncorhynchus keta eggs from the Chitose and Shiriuchi rivers in Hokkaido, northern Japan, were incubated under identical conditions with the
aim of comparing vertebral number (V
N) to that reported archived data from the 1950s. The comparison revealed that mean V
N of salmon from the Shiriuchi River has remained unchanged for 50 years and is higher than that from the Chitose River. The
V
N in the Chitose River salmon was found to be significantly higher than that recorded in the archival data. The variation in
the mean V
N of chum salmon fry collected during different seasons and years in the Chitose River falls within a range that has remained
constant, suggesting that the difference between the values obtained in our study and the archival data may be due to differences
in the timing of egg collection. These results indicate that the mean V
N of chum salmon has been stable for a long period. Incubation experiments under identical conditions are a useful tool for
examining changes in genetic structure and detecting the essential properties of populations. 相似文献
99.
100.