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英汉烟草科技 共有 50 个词条内容

5. Protoplast fusion

    Protoplast fusion is an effective method for direct intergeneric genetransfer into plant protoplasts as well as for creating new sources of cytoplasmic variability,transfer and recombining organelle genomes,and provides a suitable technique for studying c...[继续阅读]

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6. Parasexual hybridization

    Parasexual hybridization is a process to develop hybrid plants by fusion of protoplasts from different species or related plants differing in theircytoplasms. In a broad sense,it also may include inserting organellessuch as nuclei,plastids,mitochondria,an...[继续阅读]

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7.Genetically engineered resistance to herbicides

    Tobacco has been on the forefront of plants modified by genetic engineering,being the first plant used to express an engineered foreign gene.These first transformations of tobacco involved the use of Agrobacteriumtumefaciens as a vector. Since that time,s...[继续阅读]

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8. Genetically engineered resistance to virus

    The advent of molecular techniques has recently provided novelstrategies for control of plant virus disease which make use of“pathogenderived resistance”. Pathogen-derived structural or non-structural genesequences expressed in the host plant in excess am...[继续阅读]

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9. Genetically engineered resistance to pests

    The engineering of insect resistance was first demonstrated in tobaccoby the expression of insecticidal crystal proteins (ICPs) derived from B.thuringiensis (Bt),a Gram-positive,spore-forming soil bacterium.The lepidopteran-specific CrylA (b) crystal prot...[继续阅读]

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10. Production of biopharmaceuticals

    Numerous studies involving tobacco as a “biofactory” have been initiated where this solanaceous plant has been used as the recipient of genesthat encode protein products of commercial value.In work reported by Hiatt et al. ,the γ-and κ-chain cDNAs wereclo...[继续阅读]

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11. The impact of recombinant DNA technology on the flavor and fragrance industry

    Biotechnology,of which recombinant DNA technology is an important sub-discipline,has a long tradition in the production of food and flavors. Around 3500 B. C.,humans first started to use microbes for theproduction of wine,beer,bread and many other foods t...[继续阅读]

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1.Why people smoke:Stress-reduction,coping enhancement,and nicotine David G. Gilbert

    AbstractA convergence of findings indicates that smoking can relieve dysphoric mood and help individuals perform more effectively and cope withstress. For many individuals these beneficial effects of smoking appear tobe their primary reason for smoking. M...[继续阅读]

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2. Prejudice and science——Environmental tobacco smoke and health

    By Gio Batta GoriThe Health Policy Center,Bethesda,Maryland,USAAbstractThe grounds for official policy claims that environmental tobaccosmoke is a major health risk remain speculative. In scientific terms,available reports suggest either a slight increase...[继续阅读]

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The role of the TCRC in promoting science,technology,and product development in the tobacco industry

    Donald F. DurocherAbstractOver the past fifty years,sweeping technological changes have resulted in inexpensive tobacco products manufactured to exacting tolerancesusing state - of - the - art technologies. The TCRC has played a key rolein reporting and d...[继续阅读]

英汉烟草科技