Evaluation of a stress-wave timer for the minimally destructive detection of decay in living trees in Northern-Japanese forests     

Takehiro Yamaguchi  Katsuhiko Sasaki  Yasuaki Sakamoto 《Journal of Forest Research》2001,6(2):117-120

The use of a stress-wave timer as a minimally destructive device for detecting decay or defect in living trees was evaluated. Measurements were conducted on five tree species (Picea jezoensis, P.glehnii, Betula platyphylla var.japonica, Abies sachalinensis, andLarix kaempferi) with or without decay. Except in sap-rottedA. sachalinensis, the apparent stress-wave velocity in most decayed trees was considerably lower than the value obtained from healthy trees. Our results showed that defect or decay in the trees was detectable more effectively by the method used in the field survey, although the device occasionally failed to detect decay that was incipient, of small extent or confined to sapwood. Other disadvantages of this method are briefly discussed in this paper.  相似文献   

Influence of parity and litter size on gestation length in beagle dogs     

Makoto Seki  Norio Watanabe  Kenyo Ishii  Yoh-ichi Kinoshita  Takehiro Aihara  Shuji Takeiri  Takeshige Otoi 《Canadian journal of veterinary research》2010,74(1):78-80

This study was conducted to investigate the effects of parity and litter size on gestation length in beagle bitches. The mean duration of the initial elevation (>2 ng/mL) in progesterone concentrations after the onset of proestrus was shorter (P < 0.05) in bitches without (nulliparous) whelping experience than in bitches with (multiparous) whelping experience (6.9 d versus 8.0 d). When calculated as the interval between the day of initial elevation in progesterone concentrations and the day of whelping, the gestation length in the nulliparous bitches was noted to be similar to that in the multiparous bitches (64.3 d versus 64.2 d). No significant correlation between gestation length and litter size was observed in any of the bitches. Our results indicate that the gestation length in beagle bitches is not affected by parity or litter size.  相似文献   

Survey of tortoises with urolithiasis in Japan     

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   

Breeding and brewing quality of the Canadian malting barley variety ‘CDC Goldstar’ lacking lipoxygenase-1     

Masahito Nanamori  Yoshiro Tokizono  Takehiro Hoki  Wataru Saito  Ryota Aritomo  Tsutomu Yamaki  Naohiko Hirota  Narushi Suda  Aaron Beattie 《Breeding Science》2021,71(2):277

Various types of malt quality profiles have been investigated to benefit the North American brewing industry. Herein, we report the development and brewing quality of the hulled, two-row malting barley (Hordeum vulgare L.) variety ‘CDC Goldstar’ lacking lipoxygenase-1 (LOX-1-less). This new variety offers a novel malt type for the improvement of beer flavor stability. The agronomic performance of ‘CDC Goldstar’ was tested in the Western Cooperative Two Row Barley Registration Trials during 2013–2014. In addition to high lodging tolerance, the new variety showed 6% higher yield than the current leading variety ‘CDC Copeland’. The malt quality of ‘CDC Goldstar’ showed higher diastatic power and lower wort β-glucan content than ‘CDC Copeland’ and controllable proteolytic modification (soluble nitrogen and Kolbach Index). Pilot- (100 L) and commercial-scale (5,000 L) brewing trials were conducted using ‘CDC PlatinumStar’, another LOX-1-less variety with a low enzymatic profile, as the control variety. Absence of the LOX-1 trait from ‘CDC Goldstar’ maintained trans-2-nonenal levels in aged beers as low as those in other LOX-1-less varieties without affecting major beer parameters, such as ester and aldehyde content or foam stability. The newly developed ‘CDC Goldstar’ malting barley provides added value for the beer industry and consumers.  相似文献