On the history of land amelioration in Russia     

N. G. Minashina 《Eurasian Soil Science》2006,39(1):105-109

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Studies on the Safety and Immunogenicity of the South African Bluetongue Virus Serotype 2 Monovalent Vaccine: Specific Detection of the Vaccine Strain Genome by RT‐PCR     

S. Hammoumi  E. Breard  C. Sailleau  P. Russo  C. Grillet  C. Cetre‐Sossah  E. Albina  R. Sanchis  M. Pepin  J.‐M. Guibert  And S. Zientara 《Zoonoses and public health》2003,50(7):316-321

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PROTOCOL     

Zwemer RL  Lowenstein BE 《Science (New York, N.Y.)》1940,91(2351):76

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Sectioned pelvic fin ray ageing of muskellunge Esox masquinongy from a Virginia river: comparisons among readers, with cleithrum estimates, and with tag–recapture growth data     

T. O. BRENDEN  E. M. HALLERMAN  & B. R. MURPHY 《Fisheries Management and Ecology》2006,13(1):31-37

Abstract  The potential utility of pelvic fin rays as ageing structures was evaluated for southern US muskellunge Esox masquinongy Mitchill populations by comparing age estimates among three readers and against cleithrum estimates, and by comparing observed length changes of tagged fish with changes predicted from growth equations based on pelvic fin ray age estimates. Mean coefficient of variation in age estimates among all readers and between the two readers with prior ageing experience was 17.8% and 5.6%, respectively. Exact and within 1-year agreement rates between pelvic fin rays and cleithra were 76% and 100%, respectively. Mean (± 2 SE) estimated absolute error between observed and predicted length changes for 13 tagged muskellunge was 30 ± 14 mm. This evaluation indicated that pelvic fin rays may prove to be a useful, non-lethal method for ageing muskellunge in southern US waters. Validation studies are still needed to ensure that growth rings form consistently throughout fish's life span.  相似文献   

SECTION ON MATHEMATICS (A) AND AFFILIATED SOCIETY     

Hedrick ER  Baylis CA 《Science (New York, N.Y.)》1941,93(2406):124-125

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The response of potatoes to different sources of nitrogen,phosphorus and potash     

T. R. Cox  T. E. Odland 《American Journal of Potato Research》1940,17(5):105-113

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PRELIMINARY ANNOUNCEMENT OF THE DALLAS MEETING     

Moulton FR 《Science (New York, N.Y.)》1941,94(2448):499-502

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PROPOSED GLACIAL MAP OF NORTH AMERICA     

Flint RF 《Science (New York, N.Y.)》1941,93(2413):303-305

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EXPLORATION OF PUTNAM RIVER,ALASKA     

Ridgway R 《Science (New York, N.Y.)》1884,4(95):496-497

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AMPHIBIAN GAMETES AS BIOLOGICAL TEST MATERIAL     

Rugh R 《Science (New York, N.Y.)》1939,89(2309):302

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