Feeding responses of the western dry-wood termite <Emphasis Type="Italic">Incisitermes minor</Emphasis> (Hagen) (Isoptera: Kalotermitidae) against ten commercial timbers     

Yuliati Indrayani  Tsuyoshi Yoshimura  Yoshiyuki Yanase  Yuji Imamura 《Journal of Wood Science》2007,53(3):239-248

Five Japanese timbers, four timbers from the USA, and one Malaysian timber were evaluated for their resistance to the invasive dry-wood termite Incisitermes minor (Hagen) using laboratory choice and no-choice feeding tests with holed specimens. The highest survival rates of I. minor in both the heartwood and sapwood no-choice feeding tests were more than 70% after 3 months. When offered sapwood and heartwood choice feeding tests and the combined choice feeding tests, the highest survival rates of I. minor were more than 75% after 3 months. With regards to the percentage of wood mass losses in the no-choice and choice feeding tests, karamatsu (Larix leptolepsis), buna (Fagus crenata), and Douglas fir (Pseudotsuga menziesii) were classified as “resistant” species among the ten sapwood specimens. In the heartwood no-choice and choice feeding tests, the resistant species were buna, karamatsu, Douglas fir, sugi (Cryptomeria japonica), akamatsu (Pinus densiflora), and western red cedar (Thuja plicata). The ranking of the resistance of the ten commercial timbers against I. minor was buna > karamatsu > sugi > western red cedar > Douglas fir > rubber > western hemlock > hinoki > spruce.  相似文献   

Echocardiographic Evaluation of Myocardial Changes Observed After Closure of Patent Ductus Arteriosus in Dogs          下载免费PDF全文

L. Hamabe  S. Kim  R. Yoshiyuki  T. Fukayama  T.M. Nakata  R. Fukushima  R. Tanaka 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2015,29(1):126-131

Background

Closure of PDA can be associated with echocardiographic changes including deterioration of LV systolic function. Although PDA is commonly encountered in dogs, few comprehensive reports of echocardiographic changes in dogs with PDA closure are available.

Objectives

To evaluate the short‐term echocardiographic changes observed after PDA closure in dogs using strain analysis.

Animals

Seventeen client‐owned dogs with left‐to‐right PDA.

Methods

Echocardiographic evaluations, including standard echocardiography and two‐dimensional tissue tracking (2DTT), were performed before and within 3 days of PDA closure.

Results

Preclosure examination showed LV and left atrial dilatation indicating volume overload as a result of PDA. Closure of PDA resulted in significant reduction of LVIDd (<.0001) and LA/Ao (0.01) without change in LVIDs, suggestive of decreased preload. Postclosure LV systolic dysfunction was observed with significant decreased in FS (<.0001) and strain values (P = .0039 for radial strains, P = .0005 for circumferential strains). Additionally, significant LV dyssynchrony (P = .0162) was observed after closure of PDA.

Conclusions and Clinical Importance

Closure of PDA resulted in decreased preload as a result of alleviation of LV volume overload, which in turn caused transient deterioration of LV systolic function. Additionally, this study demonstrated that strain analysis is load dependent. Therefore, care should be taken when interpreting strain measurements as an indicator of LV systolic function.  相似文献   

The relationship between oocyte morphology and ovarian status in cattle     

Nagano M  Hishinuma M  Katagiri S  Takahashi Y 《The Journal of reproduction and development》2007,53(4):953-958

We investigated the relationships between oocyte morphology, follicular size and follicular waves using bovine ovaries derived from local abattoirs. Ovaries at the recruitment and selection phases contained larger numbers of oocytes with good developmental ability, although ovaries at the recruitment phase contained the largest numbers of follicles compared with ovaries at the selection and dominant phases. Dominant phase ovaries contained a high percentage of oocytes with as good developmental ability as selection phase ovaries; however, they contained the lowest total number of oocytes with good developmental ability. Small follicles under 3.0 mm in diameter contained large numbers of small and degenerating oocytes. In contrast, follicles more than 3.0 mm in diameter contained a higher percentage of oocytes with good developmental ability.  相似文献   

Diluted isoflurane as a suitable alternative for diethyl ether for rat anaesthesia in regular toxicology studies     

Nagate T  Chino T  Nishiyama C  Okuhara D  Tahara T  Maruyama Y  Kasahara H  Takashima K  Kobayashi S  Motokawa Y  Muto S  Kuroda J 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2007,69(11):1137-1143

Despite its explosive properties and toxicity to both animals and humans, diethyl ether is an agent long used in Japan in the anaesthesia jar method of rat anaesthetises. However, in response to a recent report from the Science Council of Japan condemning diethyl ether as acceptable practice, we searched for an alternative rat anaesthesia method that provided data continuous with pre-existing regular toxicology studies already conducted under diethyl ether anaesthesia. For this, we examined two candidates; 30% isoflurane diluted with propylene glycol and pentobarbitone. Whereas isoflurane is considered to be one of the representatives of modern volatile anaesthetics, the method of propylene glycol-diluted 30% isoflurane used in this study was our modification of a recently reported method revealed to have several advantages as an inhalation anaesthesia. Intraperitoneal pentobarbitone has long been accepted as a humane method in laboratory animal anaesthesiology. These 2 modalities were scrutinized in terms of consistency of haematology and blood chemistry with previous results using ether. We found that pentobarbitone required a much longer induction time than diethyl ether, which is suspected to be the cause of fluctuations in several haematological and blood chemical results. Conversely, only calcium ion concentration showed a slight difference from traditional results in the case of 30% isoflurane. Additionally, serum prolactin and corticosterone levels indicated that 30% isoflurane induced less stress than ether, confirming that 30% isoflurane can both provide results consistent with diethyl ether, while at the same time remove its disadvantages. As such 30% isoflurane appears to be a strong alternative anaesthetic agent for future regular toxicology studies in Japan.  相似文献   

Evaluation of mean arterial blood pressure, heart rate, and sympathetic nerve activity in rabbits after administration of two formulations of etomidate     

McIntosh MP  Narita H  Kameyama Y  Rajewski RA  Goto H 《Veterinary anaesthesia and analgesia》2007,34(3):149-156

OBJECTIVE: To evaluate and compare the effects of the aqueous sulfobutyl ether beta-cyclodextrin (SBE-CD) etomidate formulation and the commercial etomidate formulation on mean arterial pressure (MAP), heart rate, and sympathetic outflow using neuraxis-intact and baro-denervated rabbits. STUDY DESIGN: Prospective experimental study. ANIMALS: Twenty-seven male New Zealand white rabbits. METHODS: Under basal anesthesia (urethane) and ventilation with intermittent positive pressure (IPPV), the New Zealand white rabbits underwent surgical preparation including isolation of the left renal sympathetic nerve and, in the baro-denervated models, additional combined denervation of bilateral carotid sinus, aortic, and vagal nerves. After hemodynamic stabilization, both neuraxis-intact and baro-denervated animals received bolus intravenous (IV) injection (0.6 mg kg(-1)) of either the SBE-CD or commercial etomidate formulation over 5 seconds (n = 6 animals per group). RESULTS: Mean arterial pressure decreased significantly in all four groups to the same extent. However, the rate of MAP decrease was lower in the SBE-CD-treated groups relative to the commercial formulation. Renal sympathetic nerve activity was decreased significantly less in the SBE-CD group in the baro-denervated studies. Independent pharmacokinetic evaluation demonstrated that the two formulations had comparable plasma concentration-time profiles. CONCLUSIONS AND CLINICAL RELEVANCE: Etomidate in the commercial drug product is solubilized with propylene glycol, a cosolvent associated with adverse side effects on injection. An aqueous formulation of etomidate has been developed, which utilizes SBE-CD as a solubilizing agent. The data suggest that the SBE-CD etomidate formulation may be a safer IV induction formulation than the commercial etomidate drug product.  相似文献   

Collection,preservation and distribution of Oryza genetic resources by the National Bioresource Project RICE (NBRP-RICE)     

Yutaka Sato  Katsutoshi Tsuda  Yoshiyuki Yamagata  Hiroaki Matsusaka  Hiromi Kajiya-Kanegae  Yuri Yoshida  Ayumi Agata  Kim Nhung Ta  Sae Shimizu-Sato  Toshiya Suzuki  Misuzu Nosaka-Takahashi  Takahiko Kubo  Shoko Kawamoto  Ken-Ichi Nonomura  Hideshi Yasui  Toshihiro Kumamaru 《Breeding Science》2021,71(3):291

Biological resources are the basic infrastructure of bioscience research. Rice (Oryza sativa L.) is a good experimental model for research in cereal crops and monocots and includes important genetic materials used in breeding. The availability of genetic materials, including mutants, is important for rice research. In addition, Oryza species are attractive to researchers for both finding useful genes for breeding and for understanding the mechanism of genome evolution that enables wild plants to adapt to their own habitats. NBRP-RICE contributes to rice research by promoting the usage of genetic materials, especially wild Oryza accessions and mutant lines. Our activity includes collection, preservation and distribution of those materials and the provision of basic information on them, such as morphological and physiological traits and genomic information. In this review paper, we introduce the activities of NBRP-RICE and our database, Oryzabase, which facilitates the access to NBRP-RICE resources and their genomic sequences as well as the current situation of wild Oryza genome sequencing efforts by NBRP-RICE and other institutes.  相似文献   

杨树人工接虫方法的研究   总被引：13，自引：0，他引：13       下载免费PDF全文

胡建军  赵自成  苗世龙  高瑞桐  藤本吉幸  韩一凡 《林业科学研究》1998,11(6):574-580

１９９５￣１９９６年,对美洲黑杨树上套笼接虫,室内离体接虫和网室接虫三种人工接光肩星天牛成虫的方法进行了研究,利用天牛刻槽数对这三种方法进行了比较和评价。结果表明,天牛刻槽产卵与杨树的抗虫性无关,可用来进行人工接虫方法的比较,孵化幼虫数和越冬后存活幼虫数是评价杨树抗虫性大小的标准。树上套笼接虫不受树木的胸径大小影响,成本较低,能够早期鉴定林木抗虫性,是一套经济,有效,科学的杨树人工接虫方法。  相似文献   

应用RAPD分子标记分析“晚绿”品种的杂交亲本   总被引：39，自引：6，他引：33  

梁月荣  田中淳一  武田善行 《茶叶科学》2000,20(1):22-26

应用随机扩增多态性DNA (RAPD)技术对茶树无性系品种“晚绿”进行亲子关系分析。所用 10 8条随机引物中的 93条引物对日本静冈和枕畸两地取样的 6个无性系茶树品种的 8份材料的基因组DNA分别扩增出 1- 8条谱带 ,平均每条引物 3 5条。其中 19条引物扩增出“晚绿”与其母本“数北”不同的RAPD分子标记 30个。从中选择 6条引物对 8份供试材料的基因组DNA鉴定表明 ,其中 4个RAPD分子标记显示出“晚绿”品种特异性 ,说明包括“静在 16”在内的 4个供试品种都不是“晚绿”的真正父本。本文还证明 ,不同生态条件下生长的同一无性系茶树品种的基因组DNA具有遗传保守性  相似文献   

A progestin-based treatment with a high dose of estradiol benzoate normalizes cyclic changes in endometrial EGF concentrations and restores fertility in repeat breeder cows     

Katagiri S  Takahashi Y 《The Journal of reproduction and development》2008,54(6):473-479

The objective of the present study was to examine the efficacy of a progestin-based treatment with a high dose of estradiol benzoate (EB) to normalize the epidermal growth factor (EGF) profile in the uterine endometrium and restore fertility in repeat breeder cows. Repeat breeder cows without peaks in their endometrial EGF concentrations on Days 3 and 14 of the estrous cycle were used throughout the study. The effect of 1 (standard dose), 2.5 and 5 mg of EB in a progestin-based treatment protocol (EB1, EB2.5 and EB5 treatments, respectively; n=5 for each group) on endometrial EGF concentrations was first examined. The EB1 and EB2.5 treatments in the repeat breeder cows produced a suppressed response in endometrial EGF compared with EB1 treatment in the fertile controls (n=5) and failed to restore the normal EGF profile during the next estrous cycle. However, EB5 treatment produced an increase in EGF concentrations similar to the fertile controls and normalized the endometrial EGF profile. The effects of the EB1 and EB5 treatments (n=30 for each group) on the endometrial EGF profile and fertility were then examined in the repeat breeder cows. The proportion of cows, with an EGF profile normalized by the treatments was higher in the EB5 group (66.7%) than in the EB1 (30.0%) and untreated control (13.3%; n=30) groups (P<0.01). The pregnancy rates of the cows having a normal EGF profile after treatment in the EB1 and EB5 groups were similar (88.9 and 85.0%, respectively) and higher than those of the cows having an abnormal profile within the same groups (19.0 and 30.0%, respectively, P<0.01). In summary, the endometrial response to EB in terms of the EGF concentration was suppressed in repeat breeder cows. A high dose (5 mg) of EB in a progestin-based treatment was found to be effective for restoration of a normal EGF profile and fertility in repeat breeder cows having lesser endometrial EGF concentrations on Days 3 and 14.  相似文献   

Yellow spot of white lace flower caused by Pleospora herbarum in Japan     

Daisuke Kurose  Yoshihiko Kanegae  Tomoo Misawa  Yoshiyuki Ebihara  Chika Tanaka  Terukazu Watanabe  Seiji Uematsu  Seiya Tsushima  Toyozo Sato 《Journal of General Plant Pathology》2015,81(2):169-172

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