秸秆全价生物饲料的概况及其生产问题     

赵军  刘培成  王耀光  郑玉琴 《内蒙古草业》2002,(3)

秸秆全价生物饲料 ,是利用四季生长的农作物的叶、秆、根、藤、茎、壳、工业下脚料及无毒无害野草等秸秆为原料 ,采用化学、生物工程相结合的方法 ,将秸秆纤维分解、优化并产生大量的真蛋白和多种氨基酸营养物质 ,即可取代 30 %～ 5 0 %的精粮 (玉米 ) ,再加入微量的添加剂及辅助料粮 ,经熟化制作而成 ,是饲喂猪、鸡、鸭、鱼、牛、羊等多种禽、畜及水产动物低成本的全价高效生物饲料。  相似文献   

THE CONTRIBUTION OF THE CHEMIST TO THE INDUSTRIAL DEVELOPMENT OF THE UNITED STATES     

Hesse BC 《Science (New York, N.Y.)》1915,41(1062):665-675

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Warns of the threat of zoonotic diseases in children     

Anderson BC 《Journal of the American Veterinary Medical Association》2007,230(4):490-491

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Akabane viral encephalitis in calves in South Korea     

Lee JK  Kim JH  Park BK  Yoo HS  Lee BC  Kim DY 《The Veterinary record》2007,161(7):236-238

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Molecular cloning, in vitro expression and bioactivity of goose B-cell activating factor     

Dan WB  Guan ZB  Zhang C  Li BC  Zhang J  Zhang SQ 《Veterinary immunology and immunopathology》2007,118(1-2):113-120

B-cell activating factor (BAFF), belonging to the TNF family, is critical for B cell survival and maturation. cDNA of goose BAFF (gBAFF) was amplified from goose spleen by RT-PCR. The open reading frame (ORF) of gBAFF encodes a protein of 288-amino acid. The gBAFF shows 98, 92, 44 and 55% amino acid sequence identity with duck (dBAFF), chicken (cBAFF), mouse (mBAFF) and human BAFF (hBAFF), respectively. RT-PCR results showed that gBAFF mRNA is expressed in thymus and more highly expressed in the bursa of Fabricius and spleen. Recombinant soluble gBAFF (gsBAFF) expressed in Escherichia coli has molecular weight of approximately 19kDa. In vitro, purified gsBAFF was able to promote bursa B cells survival/proliferation in goose, duck and chicken. Furthermore, recombinant dsBAFF and csBAFF have a positive effect on goose, duck and chicken bursa B cells survival/proliferation. These findings indicate that gBAFF plays an important role in the survival/proliferation of goose B cells and, owing to its high evolutionary conservation, functional cross-reactivity exists between chicken, duck and goose BAFF.  相似文献   

The relationship between agricultural environments and olfactory dysfunction     

Snyder MC  Leopold DA  Chiu BC  Von Essen SG  Liebentritt N 《Journal of agricultural safety and health》2003,9(3):211-219

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Ecdysteroids of quinoa seeds (Chenopodium quinoa Willd.)     

Zhu N  Kikuzaki H  Vastano BC  Nakatani N  Karwe MV  Rosen RT  Ho CT 《Journal of agricultural and food chemistry》2001,49(5):2576-2578

Quinoa (Chenopodium quinoa) is a hardy and nutritious Latin American pseudo-cereal. Studies on the seeds led to the isolation of five ecdysteroids using column chromatography. Their structures were determined as ecdysterone, makisterone A, 24-epi-makisterone A, 24(28)-dehydromakisterone A, and 20,26-dihydroxyecdysone by spectroscopic methods. This study demonstrates that quinoa seeds are a source of ecdysteroids, which were reported to be molting hormones in insects.  相似文献   

Net Exchange of CO2 in a Mid-Latitude Forest     

Wofsy SC  Goulden ML  Munger JW  Fan SM  Bakwin PS  Daube BC  Bassow SL  Bazzaz FA 《Science (New York, N.Y.)》1993,260(5112):1314-1317

The eddy correlation method was used to measure the net ecosystem exchange of carbon dioxide continuously from April 1990 to December 1991 in a deciduous forest in central Massachusetts. The annual net uptake was 3.7 +/- 0.7 metric tons of carbon per hectare per year. Ecosystem respiration, calculated from the relation between nighttime exchange and soil temperature, was 7.4 metric tons of carbon per hectare per year, implying gross ecosystem production of 11.1 metric tons of carbon per hectare per year. The observed rate of accumulation of carbon reflects recovery from agricultural development in the 1800s. Carbon uptake rates were notably larger than those assumed for temperate forests in global carbon studies. Carbon storage in temperate forests can play an important role in determining future concentrations of atmospheric carbon dioxide.  相似文献   

Pituitary degeneration and adrenal tissue hyperplasia in spawning Pacific salmon     

ROBERTSON OH  WEXLER BC 《Science (New York, N.Y.)》1957,125(3261):1295-1296

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Cretaceous drowning of reefs on mid-pacific and Japanese guyots     

Matthews JL  Heezen BC  Catalano R  Coogan A  Tharp M  Natland J  Rawson M 《Science (New York, N.Y.)》1974,184(4135):462-464

Reefs dredged on guyots of the Mid-Pacific Mountains and the Japanese Seamounts yield middle Cretaceous fossils, indicating that submergence killed off the fauna of the reefs sometime during the Albian-Cenomanian. Eustatic rise of sea level is probably responsible.  相似文献