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Abinitio与密度泛函理论研究BeC_3异构体的结构与稳定性 被引量:1
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作者 黄正国 周利 徐梅芳 《天津师范大学学报(自然科学版)》 CAS 2008年第4期1-5,共5页
采用密度泛函理论和CCSD(T)方法对各种BeC3异构体进行了研究,获得了各异构体的平衡构型,并计算了各自的振动频率和相对能量.结果表明,Be原子通过与环型C3分子中的2个碳原子发生侧配作用而形成的5s是基态异构体,而1s,6s和1t都具有与5s相... 采用密度泛函理论和CCSD(T)方法对各种BeC3异构体进行了研究,获得了各异构体的平衡构型,并计算了各自的振动频率和相对能量.结果表明,Be原子通过与环型C3分子中的2个碳原子发生侧配作用而形成的5s是基态异构体,而1s,6s和1t都具有与5s相近的能量,都是BeC的稳定异构体. 展开更多
关键词 密度泛函理论 CCSD(T) bec3
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HIV/AIDS selective infectivity-report of two peculiar cases
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作者 Azikiwe CCA Ifezulike CC +3 位作者 Amazu LU Enye JC Nwosu PJC Osuala FN 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2010年第12期1006-1008,共3页
We report two peculiar cases that were observed in two communities of Anambra State,South East Nigeria.The first case was a woman of 44 with a history of blood transfusion from a donor of questionable HIV status.A pin... We report two peculiar cases that were observed in two communities of Anambra State,South East Nigeria.The first case was a woman of 44 with a history of blood transfusion from a donor of questionable HIV status.A pint of blood was transfused in a private Hospital on the 15th January. 2000.She has had no form of antiviral therapy until 22nd April.2008 when she came to the hospital for routine medical check up.Her HIV result came out confirmed positive while that of her husband came out negative.She has had active sexual life with her husband in the previous eight years as they have had some difficulties in getting their desired extra two children having earlier gotten a boy and a girl.The second case involves a family of six.A couple with four children of ages about 6 months,2 years,3 years and 5 years.The youngest,a female presented with fever and multiple lymphadenopathy.She tested HIV positive and so was her mother and her second sibling.But her father and two other siblings remained negative at post three and six months intervals from their very first test date with us.These reported cases appear to go contrary to earher formed opinion on HIV transmission.We support the opinion on a naturally,occurring substance,APOBEC3G which possibly confers permanent immunity against the HIV virus.We recommend clinical trials of the characterized APOBEC3G as a vaccine for non HIV infected persons of all ages and to people living with HIV/AIDS as a therapeutic drug. 展开更多
关键词 AP0bec3G HIV PECULIAR CASES HIV VACCINE
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