Immunohistochemical studies for the neuronal elements in the vomeronasal organ of the one-humped camel     

Dalia IBRAHIM  Fatma ABDEL-MAKSOUD  Kazumi TANIGUCHI  Yoshio YAMAMOTO  Kazuyuki TANIGUCHI  Nobuaki NAKAMUTA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(2):241-245

The neuronal elements of the vomeronasal organ (VNO) of camel were investigated immunohistochemically. PGP 9.5 labeled the receptor cells in the vomeronasal sensory epithelium, but not the supporting or basal cells. OMP stained some receptor cells, but no immunoreactive signals for OMP were detected in the non-sensory epithelium. PLCβ2 labeled scattered cells in the sensory epithelium and a larger number of cells in the non-sensory epithelium. Double labeling immunohistochemistry revealed that the PLCβ2-positive cells were surrounded by substance P-positive nerve fibers. Collectively, these data suggest that the camel VNO bears, in addition to the mature vomeronasal receptor cells, trigeminally-innervated solitary chemosensory cells which are expected to play a substantial role in the control of stimulus access to the VNO.  相似文献   

Shunt bilirubin: evidence for two components     

ISRAELS LG  YAMAMOTO T  SKANDERBEG J  ZIPURSKY A 《Science (New York, N.Y.)》1963,139(3559):1054-1055

Studies with C(14)-labeled glycine and delta-aminolevulinic acid as heme-bilirubin precursors in man indicate that the early labeled or shunt bilirubin consists of two fractions. Fraction 1 requires 1 to 24 hours for maximum synthesis, is not dependent on marrow erythropoietic heme synthesis, and is possibly of anabolic origin (formed by a direct pathway from heme precursors). Fraction 2 requires 3 to 4 days for maximum production, is dependent on heme synthesis, and probably has its origin in the bone marrow, as a degradation product of red-cell heme.  相似文献   

Soil development and fertility characteristics of inland valleys in the rain forest zone of Nigeria: Physicochemical properties and morphological features   总被引：1，自引：0，他引：1  

Susumu S. ABE  Gbade O. OYEDIRAN  Sadahiro YAMAMOTO  Tsugiyuki MASUNAGA  Toshimasa HONNA  Toshiyuki WAKATSUKI 《Soil Science and Plant Nutrition》2007,53(2):141-149

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Testicular development and serum profiles of steroid hormone levels in captive male Pacific herring Clupea pallasii during their first maturational cycle     

YASUNORI  KOYA  KIYOSHI  SOYANO  KAZUHISA  YAMAMOTO  HIROYUKI  OBANA  TAKAHIRO  MATSUBARA 《Fisheries Science》2002,68(5):1099-1105

The present study investigates the relationship between testicular development and serum steroid hormone levels in captive Pacific herring Clupea pallasii during the first reproductive cycle. The maturity of the testis was divided into five periods based on histological observation. These are early spermatogenic stage (April to July), mid-spermatogenic stage (August to November), late spermatogenic stage (December to March), functional maturation stage (early April) and spent stage (late April). The pattern of seasonal change in gonadosomatic index (GSI) clearly reflected testicular maturity. 11-Ketotestosterone (11-KT) levels increased from October to a peak level (6.58 ± 1.87 ng/mL) in January, and were maintained at this level until March. In contrast, testosterone levels were consistently low, less than 1 ng/mL, at all times. These results suggest that 11-KT is the predominant androgen that controls spermatogenesis in this species. 17,20β-Dihydroxy-4-pregnen-3-one (DHP) showed a single sharp peak (3.38 ± 0.35 ng/mL) in early April of the second year, suggesting that milt production is induced by DHP as in some other teleost species.  相似文献   

Adsorption of minerals on the isolated mantle of Patinopecten yessoensis     

MINORU  FUNAKI  JUNJI  YAMAMOTO  MAKOTO  NISHIZAWA  TAKASHI  YAMAGISHI 《Fisheries Science》2002,68(5):1151-1154

The isolated mantle of scallop ( Patinopecten yessoensis ) was shown to adsorb minerals (Zn, Ca, Mg, Fe, Cu, Ni and Co) to more than 1% upon treatment with mineral solution. The amounts of adsorbed Zn, Ca and Mg were 44.3, 47.4 and 15.5 mg/g dry weight, when the mantle was treated with 5% ZnSO₄, CaCl₂ and MgSO₄ solutions at room temperature, respectively. The amounts of adsorbed Zn, Ca and Mg were dependent on the concentration of mineral solution used. This is the first report showing that the isolated mantle adsorbs nutritionally important minerals such as Ca, Mg and Fe. This finding may lead to the development of new mineral-enriched food supplements.  相似文献   

Application of a two-compartment one-toxin model to predict the toxin accumulation in Pacific oysters in Hiroshima Bay, Japan     

Tamiji  YAMAMOTO  Kevin J  FLYNN  Haruyoshi  TAKAYAMA 《Fisheries Science》2003,69(5):944-950

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Pathogenicity, Mating Ability and DNA Restriction Fragment Length Polymorphisms of Pyricularia Populations Isolated from Gramineae, Bambusideae and Zingiberaceae Plants     

Hajime KATO  Masaaki YAMAMOTO  Tomona YAMAGUCHI-OZAKI  Hiroyuki KADOUCHI  Yutaka IWAMOTO  Hitoshi NAKAYASHIKI  Yukio TOSA  Shigeyuki MAYAMA  Naoki MORI 《Journal of General Plant Pathology》2000,66(1):30-47

Eighty-five Pyricularia isolates were collected from 29 host species of Gramineae, Bambusideae and Zingiberaceae plants sampled in Brazil, Uganda, Ivory Coast, India, Nepal, China, Indonesia and Japan. These isolates were compared on the basis of pathogenicity, mating ability and restriction fragment length polymorphisms with single-copy DNA probes. Based on the pathogenicity to eight differential gramineous plants, these isolates were classified into seven pathotypes: finger millet type, foxtail millet type, common millet type, rice type, crabgrass type, Italian ryegrass/ weeping lovegrass type, and non-cereal/grass type. Genetic variation among these isolates was assessed by RFLP analysis with two restriction enzymes and nine single-copy DNA probes isolated from a finger millet strain. An UPGMA dendrogram based on the RFLPs revealed that the 85 isolates could be classified into seven major groups. Isolates from cereal crops (finger millet, foxtail millet, common millet, wheat and rice) and a grass, Brachiaria plantaginea, were clustered into a single group. They were further divided into six subgroups corresponding to the pathotypes. Among cereal crop isolates only an isolate from pearl millet was located into a different group. The remaining isolates were clustered into five groups designated as the crabgrass group, the buffelgrass and jungle rice group, the rice cutgrass, knotroot bristlegrass and Setaria tomentosa group, the bamboo and bamboo grass group and the Zingiber mioga group. The isolates from cereal crops were generally capable of mating with finger millet strains and constituted a closed mating compatibility group. These results suggested that the isolates from cereal crops form a single group with a common ancestor although they are pathogenic to taxonomically diverse plants. A combined analysis of the pathogenicity and genetic similarity suggested that the transmission of M. grisea isolates occurs in natural agroecosystems between finger millet and Eleusine africana, goosegrass or Bambusa arundinacea, between foxtail millet and green bristlegrass, and between rice and tall fescue, Italian ryegrass, sweet vernalgrass, reed canarygrass or Oryza longistaminata. Received 9 August 1999/ Accepted in revised form 12 November 1999  相似文献   

Pathogenic and nonpathogenic pleuropneumonia-like organisms in infectious sinusitis of turkeys     

ADLER HE  YAMAMOTO R 《American journal of veterinary research》1957,18(68):655-656

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The effect of certain antibiotics and chemical agents on pleuropneumonia-like organisms of avian origin     

YAMAMOTO R  ADLER HE 《American journal of veterinary research》1956,17(64):538-542

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Empirical Growth Curve Estimation Using Sigmoid Sub-functions that Adjust Seasonal Compensatory Growth for Male Body Weight of Thoroughbred Horses     

Tomoaki ONODA  Ryuta YAMAMOTO  Kyohei SAWAMURA  Yoshinobu INOUE  Akira MATSUI  Takeshi MIYAKE  Nobuhiro HIRAI 《Journal of Equine Science》2011,22(2):37-42

Thoroughbred horses are seasonal mating animals, raised in northern regions or countries. Foals born yearly in spring generally show a typical seasonal compensatory growth pattern, in which their growth rate declines in the first winter and increases in the next spring. In this study, a new empirical adjustment approach is proposed to adjust for this compensatory growth when growth curve equations are estimated, by using 1,633 male body weights of Thoroughbreds as an illustrating example. Based on general Richards growth curve equation, a new growth curve equation was developed and fit to the weight-age data. The new growth curve equation had a sigmoid sub-function that can adjust the compensatory growth, combined with the Richards biological parameter responsible for the maturity of animals. The unknown parameters included in the equations were estimated by SAS NLMIXED procedure. The goodness of fit was examined by using Akaike’s Information Criterion (AIC). The AIC values decreased from 13,053 (general Richards equation) to 12,794 (the newly developed equation), indicating the better fit of the new equation to the weight-age data. The shape of the growth curve was improved during the period of compensatory growth. The proposed method is one of the useful approaches for adjusting seasonal compensatory growth in growth curve estimations for Thoroughbreds, and for their management during the compensatory period. Based on this approach, the optimal growth curve equations can be estimated also for female body weight of Thoroughbreds or other growth traits affected by seasonal compensatory growth.  相似文献