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| 1 | 河南偃师灰嘴遗址新石器时代和二里头文化时期工具残留物及微痕分析显示文摘河南偃师灰嘴遗址包含有仰韶中晚期、龙山中晚期、二里头时期及东周时期遗存。该遗址在龙山和二里头时期发展成为石器制造中心,在伊洛地区史前时期社会复杂化发展进程中扮演了重要角色。为了进一步了解各个时期的生计结构,我们对灰嘴出土的28件切割工具(刀、镰和矛)进行了微痕、淀粉粒和植硅体的综合分析。分析结果说明,刀和镰主要是用来收割栽培谷物,包括粟黍、薏苡、小麦族和稻谷,但也收获或加工其他植物,如大豆和多种块根类植物,如山药、百合科、栝楼根等。结合浮选结果进行综合性分析,可知先民在灰嘴居住的两千多年历史中的生计形态变化表现为:仰韶时期是以粟黍-薏苡为主,到龙山、二里头时期逐渐转变为以粟黍-薏苡-麦类-大豆为主,同时始终以稻米和多种块根植物为辅。 | 刘莉 Maureece J.Levin 陈星灿 李永强 | 2018 | 中原文物2018，0，6： | 8 |
| 2 | Incidence and consequences of varicella in children treated for cancer in Guatemala显示文摘Background:Varicella-zoster virus infection is associated with significant morbidity and mortality in immune-compromised children,despite treatment with antiviral agents.Universal varicella vaccine programs have significantly decreased this risk in many highincome countries,but in most low-income and middleincome countries,the burden of varicella in children treated for malignancy is poorly defi ned.Methods:We retrospectively reviewed records of children at the National Unit of Pediatric Oncology(UNOP)in Guatemala diagnosed with varicella between January 2009 and March 2013 in order to calculate incidence of varicella and evaluate morbidity,mortality,treatment interruption,and cost.Results:Fifty-nine cases of varicella were identified.Incidence was 23.4 cases per 1000 person-years(p-y).66.1%of cases occurred in children with leukemia(median age 5.2 years;interquantile range 3.4-7 years)and 41.0%of these occurred during maintenance therapy.Source of exposure was identified for 14/59(23.7%)children.Most were hospitalized(71.2%)and given intravenous acyclovir(64.4%).Eight(13.6%)children required critical care,and two(3.4%)died from disseminated varicella with multiorgan failure.Chemotherapy was delayed or omitted due to varicella in 50%.No signifi cant differences in outcomes based on nutritional and immunologic status were detected.The minimum average cost of treatment per episode was 598.75 USD.Conclusions:Varicella is a significant problem in children treated for cancer in Guatemala,where effective post-exposure prophylaxis is limited.In the absence of universal varicella vaccination,strategies to improve recognition of exposure and the future use of novel inactivated vaccines currently under investigation in clinical trials could mitigate this burden. | Amy E.Caruso Brown Edwin J.Asturias Mario Melgar Federico A.Antillon-Klussmann Pamela Mettler Myron J.Levin | 2016 | World Journal of Pediatrics2016，12，3： | 1 |
| 3 | Short- run and Long- run Determinants of the Price of Gold显示文摘 | Eric J.Levin Robert E.Wright | | 0，，32： | 1 |
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