The proteins synthesized in tissue infected with tobacco mosaic virus     

COMMONER B  YAMADA M  RODENBERG SD  WANG TY  BASLER E 《Science (New York, N.Y.)》1953,118(3071):529-534

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Effects of dietary supplementation of nickel and nickel-zinc on femoral bone structure in rabbits     

Monika Martiniaková  Radoslav Omelka  Birgit Grosskopf  Hana Chovancová  Peter Massányi  Peter Chrenek 《Acta veterinaria Scandinavica》2009,51(1):52

Background

Nickel (Ni) and zinc (Zn) are trace elements present at low concentrations in agroecosystems. Nickel, however, may have toxic effects on living organisms and is often considered as a contaminant. This study reports the effect of peroral administrated Ni or a combination of Ni and Zn on femoral bone structure in rabbits.

Methods

One month-old female rabbits were divided into three groups of five animals each. Group 1 rabbits were fed a granular feed mixture with addition of 35 g NiCl₂ per 100 kg of mixture for 90 days. In group 2, animals were fed a mixture containing 35 g NiCl₂ and 30 g ZnCl₂ per 100 kg of mixture. Group 3 without administration of additional Ni or Zn served as control. After the 90-day experimental period, femoral length, femoral weight and histological structure of the femur were analyzed and compared.

Results

The results did not indicate a statistically significant difference in either femoral length or weight between the two experimental groups and the control group. Also, differences in qualitative histological characteristics of the femora among rabbits from the three groups were absent, except for a fewer number of secondary osteons found in the animals of groups 1 and 2. However, values for vascular canal parameters of primary osteons were significantly lower in group 1 than in the control one. Peroral administration of a combination of Ni and Zn (group 2) led to a significant decreased size of the secondary osteons.

Conclusions

The study indicates that dietary supplementation of Ni (35 g NiCl₂ per 100 kg of feed mixture) and Ni-Zn combination (35 g NiCl₂ and 30 g ZnCl₂ per 100 kg of the mixture) affects the microstructure of compact bone tissue in young rabbits.  相似文献   

Flight patterns of Russian wheat aphid,Diuraphis noxia (Kurdj.) during its expansion to Central Europe (Hom., Aphididae)     

Hana Luka?ová  Zsuzsa Basky  Petr Stary 《Anzeiger für Sch?dlingskunde》1999,39(2):41-44

Flight patterns of migrant alate Russian wheat aphids (=RWA),Diuraphis noxia (Kurdj.) during its expansion from the south-east to Central Europe were determined. Samples were taken by Rothamsted-type suction air traps in Hungary (one location, 1990–1997) and in the Czech Republic (5 locations, 1994–1998). The results document a progressive expansion of RWA, and population variation in the individual years and periods of the season. A comparison of the evidence on RWA in the individual years since its detection in Hungary and in the Czech Republic supports the presumption on the occurrence of an expansion route from the south-east (Turkey) to Central Europe. This expansion is classified as an adventive route of the over-all expansion that has covered the whole West-Mediterranean (South Europe, North Africa).  相似文献   

Expression of podoplanin in various types of feline tumor tissues     

Satoshi KAMOTO  Masahiro SHINADA  Daiki KATO  Masaya TSUBOI  Sho YOSHIMOTO  Ryohei YOSHITAKE  Shotaro ETO  Namiko IKEDA  Yosuke TAKAHASHI  Yuko HASHIMOTO  James CHAMBERS  Kazuyuki UCHIDA  Shinji YAMADA  Mika K. KANEKO  Ryohei NISHIMURA  Yukinari KATO  Takayuki NAKAGAWA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(11):1795

Podoplanin is expressed in various human tumors where it promotes tumor progression, epithelial-mesenchymal transition, and distant metastasis. Podoplanin is also expressed in cancer-associated fibroblasts and induces tumor malignancy. The objective of this study was to evaluate podoplanin expression in various types of feline tumor tissues. Immunohistochemical analysis revealed that podoplanin was expressed in cells of 13/15 (87%) squamous cell carcinomas and 5/19 (26%) fibrosarcomas. Moreover, cancer-associated fibroblasts expressed podoplanin in most tumor types, including 18/21 (86%) mammary adenocarcinoma tissues. Our findings demonstrate that various types of feline tumor tissues expressed podoplanin, indicating the importance of the comparative aspects of podoplanin expression, which may be used as a novel research model for podoplanin biology.  相似文献