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   

Carbohydrates of the otolith organ in the rainbow trout Oncorhynchus mykiss detected by lectins     

Yasuaki Takagi  Kou Ishida and  Yasuo Mugiya 《Fisheries Science》2000,66(5):933-939

  相似文献   

Corynespora blight of sweet pepper (<Emphasis Type="Italic">Capsicum annuum</Emphasis>) caused by <Emphasis Type="Italic">Corynespora cassiicola</Emphasis> (Berk. &; Curt.) Wei     

Yoshifumi Shimomoto  Rie Adachi  Yasuaki Morita  Kazutaka Yano  Akinori Kiba  Yasufumi Hikichi  Shigeharu Takeuchi 《Journal of General Plant Pathology》2008,74(4):335-337

In 2004, Corynesopra cassiicola was isolated from dark brown spots on leaves and fruits and from black blights on stems of sweet pepper plants in Kochi Prefecture, Japan. The isolated fungus was then used to inoculate sweet pepper plants and subsequently reisolated from the plants with dark brown spots and black blights, showing that C. cassiicola is a new pathogen causing Corynespora blight on sweet pepper plants. The nucleotide sequence data reported are available in the DDBJ/EMBL/GenBank databases as accession numbers AB366649 (TS-C11), AB366650 (TS-C21), AB366651 (TI-C32) and AB366652 (TI-C51)  相似文献   

Hydrocephalus with visual deficits in a cat     

Kawasaki Y  Tsuruta T  Setogawa Y  Sakamoto H 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2003,65(12):1361-1364

A 22-month-old male Japanese mongrel cat with a history of dysuria and recurrent generalised tonic-clonic seizure was examined by neuro-opthalmological testing and computed tomography (CT). Vision testing revealed narrowing of the visual field in the right eye, and complete visual deficits in the left eye. Pupillary reactions, and motor and sensory function in the eyelids and the eyes were normal. The cat was diagnosed as hydrocephalus by CT examination, because dilation of the right lateral ventricle, and compression of the right temporal and occipital cortices was shown. The etiology of the hydrocephalus was unclear. Although a unilateral lesion of the upper visual pathway was suspected, a complete homonymous hemianopsia was not shown.  相似文献   

Molecular Survey of Babesia gibsoni Using Haemaphysalis longicornis Collected from Dogs and Cats in Japan     

Shinya IWAKAMI  Yasuaki ICHIKAWA  Hisashi INOKUMA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2014,76(9):1313-1316

  相似文献   

Tartrate resistant acid phosphatase as a marker for scale resorption in rainbow trout,Oncorhynchus mykiss: effects of estradiol-17β treatment and refeeding     

Petra Persson  Yasuaki Takagi  Björn Thrandur Björnsson 《Fish physiology and biochemistry》1995,14(4):329-339

In teleosts, a considerable part of the body calcium is found in the scales. Associated with the scales are osteoblasts and osteoclasts, and during periods of high calcium demand such as during sexual maturation or starvation, the scales can be resorbed and thereby act as an internal calcium reservoir. In mammalian bone tissue, the activity of an acid phosphatase (ACP) isoenzyme, tartrate resistant acid phosphatase (TRACP), can be used as a marker for osteoclastic activity. In the present study, an evaluation of TRACP as a marker for osteoclastic activity in teleost scales has been performed. ACP and TRACP was histologically localized at resorption sites around the edge of the scales as well as at resorption holes in the scales. The optimal conditions for biochemical measurements of ACP and TRACP activity were found to be pH 5.3, 10 mM paranitrophenylphosphate, incubated for 30 min at room temperature, and 10 mM tartrate added when required. Using TRACP as a marker, estradiol-17 (E₂) was found to increase the proportion of scales being resorbed, as well as the number and size of resorption sites per scale. Also, the scales of E₂-treated fish showed weaker staining for calcium. Together, the obtained data indicate that estradiol-17 induces osteoclastic activity in teleost scales, resulting in increased resorption of the scales. A period of refeeding following a period of starvation did not have detectable effects on the scale osteoclastic activity and scale resorption.  相似文献