Research assessment in the UK     

Adams J 《Science (New York, N.Y.)》2002,296(5569):805

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Transgenic models of tumor development   总被引：33，自引：0，他引：33  

J M Adams  S Cory 《Science (New York, N.Y.)》1991,254(5035):1161-1167

Numerous cancer-prone strains of mice have been created by the introduction of candidate tumor-promoting genes into fertilized eggs. Each transgenic strain is predisposed to develop specific types of tumors, but they usually arise stochastically because of the need for spontaneous mutation of genes that collaborate with the introduced oncogene. These mice are providing insights into the effects of individual oncogenes on cellular proliferation, differentiation, and viability, as well as on oncogene cooperativity. Their predisposed state imposes sensitivity to viral and chemical carcinogenesis, and the mice should prove valuable in tests of potential carcinogens, therapies, and preventive measures.  相似文献   

Communities in decline     

Adams RM 《Science (New York, N.Y.)》1981,212(4501):1380-1381

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THE SCOTTISH SCHOOL OF GEOLOGY     

Adams FD 《Science (New York, N.Y.)》1934,80(2078):365-368

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Fred E. Wright: 1878-1953     

Adams LH 《Science (New York, N.Y.)》1954,120(3111):241-242

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An analog of myristic acid with selective toxicity for African trypanosomes.   总被引：7，自引：0，他引：7  

T L Doering  J Raper  L U Buxbaum  S P Adams  J I Gordon  G W Hart  P T Englund 《Science (New York, N.Y.)》1991,252(5014):1851-1854

Trypanosoma brucei, the protozoan parasite responsible for African sleeping sickness, evades the host immune response through the process of antigenic variation. The variant antigen, known as the variant surface glycoprotein (VSG), is anchored to the cell surface by a glycosyl phosphatidylinositol (GPI) structure that contains myristate (n-tetradecanoate) as its only fatty acid component. The utilization of heteroatom-containing analogs of myristate was studied both in a cell-free system and in vivo. Results indicated that the specificity of fatty acid incorporation depends on chain length rather than on hydrophobicity. One analog, 10-(propoxy)decanoic acid, was highly toxic to trypanosomes in culture although it is nontoxic to mammalian cells.  相似文献   

土传花叶病毒外壳蛋白基因导入小麦的研究   总被引：7，自引：0，他引：7  

庞俊兰  徐惠君  杜丽璞  叶兴国  李连城  辛志勇  马有志  刁爱波  Adams M.J 《中国农业科学》2002,35(7):738-742

 利用基因枪技术 ,将小麦土传花叶病毒外壳蛋白基因CWMV CP1和筛选基因bar导入扬麦 15 8,获得14 5株抗Bialaphos再生植株 ;PCR Southern分析 ,其中 2 1株为阳性植株 ,转化率达到 0 .99% ;T1代植株的PCR Southern、单酶切和双酶切Southern杂交 ,证明外源抗性基因已经完整地整合到小麦基因组中 ;T1代植株分离比CP1+ ∶CP1-为 1∶1.3,偏离孟德尔分离定律 ;T2 代植株总RNA ,RT PCR的试验结果表明CWMV CP1在转录水平上得到了表达  相似文献   

Energy efficiency of the mycoparasite Sporidesmium sclerotivorum in vitro and in soil     

P.B. Adams  W.A. Ayers  J.J. Marois 《Soil biology & biochemistry》1985,17(2):155-158

The energy content of the mycoparasite Sporidesmium sclerotivorum mycelium was 18,389 J g^?1 and 16,334 J g^?1 for macroconidia on a dry weight basis. The energy content of Sclerotinia minor sclerotia, the host of the mycoparasite, was 16,485 J g^?1. In liquid culture, the economic coefficient for the conversion of glucose to mycelium (mycelial dry wt ÷ glucose consumed × 100) was 51–60 whereas the mycelial energy coefficient, [mycelial energy (J) ÷ substrate energy (J) × 100] was 65–75. In soil, the conidial energy coefficient [conidial energy (J) ÷ substrate energy (J) × 100] for the conversion of host sclerotial energy to the macroconidia of the mycoparasite was 19.8, which was 2–9 times that for the conversion of glucose in liquid culture. The conidial energy coefficient when grown on a liquid medium on vermiculite was 23.0. S. sclerotivorum, as an obligate parasite of sclerotia in soil, was most efficient in the conversion of energy in a system where there was a high surface: energy ratio. In liquid culture S. sclerotivorum is more efficient than most other fungi.  相似文献   

Synthesis and studies with labeled bromacil 2-C14 and terbacil     

Gardiner JA  Rhodes RC  Adams JB  Soboczenski EJ 《Journal of agricultural and food chemistry》1969,17(5):980-986

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Biologically important thiols in various vegetables and fruits     

Demirkol O  Adams C  Ercal N 《Journal of agricultural and food chemistry》2004,52(26):8151-8154

Biological thiols are important antioxidants, and recent studies showed that their contents vary depending on the groups of foodstuffs. Therefore, we investigated the levels of some biological thiols in various vegetables and fruits by using a sensitive high-performance liquid chromatography (HPLC) technique. Biological thiols measured in some vegetables and fruits include glutathione (L-glutamyl-L-cysteinly glycine, GSH), N-acetylcysteine (NAC), captopril [CAP (C9H15NO3S)], homocysteine (HCYS), cysteine (CYS), and gamma-glutamyl cysteine (GGC). Our results show that biological thiol contents are between 3-349 nM/g wet weight in vegetables and 4-136 nM/g wet weight in fruits. CAP is only found in asparagus (28 nM/g wet weight). Furthermore, none of the biological thiols analyzed were found in cabbages, red grapes, blackberries, apples, and peaches. Therefore, various vegetables and fruits differ significantly in their thiol contents. Oxidation of these important thiols may occur and result in the production of toxic byproducts, if they are exposed to radiation and ozone treatment for sterilization purposes. Further studies should be performed to monitor the levels of these biological thiols.  相似文献