辛氏切头涡虫在福建的新分布

在福建省闽清县安仁溪上游尚德村附近溪流中的石蟹体表发现辛氏切头涡虫(Temnocephalasemperi),这是半个多世纪以来第三次在我国的自然界采获该种涡虫,并首次在切头涡虫体内发现寄生线虫。对生活在闽清山区溪流中的辛氏切头涡虫的生境、形态结构、生活习性、食性、地理分布等做了记述,对辛氏切头涡虫的栖主、超寄生现象和分布等进行了讨论。     

山东首次发现晚始新世哺乳动物化石地点

本文报道了鲁西曲阜董庄、泗水拓沟间黄庄一带发现的哺乳动物化石.描述了含哺乳动物化石的地层,建立了黄庄组.依据所产化石对黄庄组的时代进行了讨论,认为是晚始新世.     

洛浦县山普拉出土颅骨的初步研究

本文研究洛浦县山普拉公社出土的成人颅骨59例(男26、女33),其时代为公元前一世纪—公元三世纪。山普拉人显示出既有大蒙古人种的大部分特征,也有欧罗巴人种的许多特征。山普拉人是一个混血的民族。根据发掘情况,可以肯定他们是当地土著。经t值检验有半数测量性体征在两性之间有非常显著或显著差异。     

山西榆社细石器遗存

注入渤海的海河水系上游山西省榆社县新发现两处旧石器时代晚期遗址,出土２００多件石制品和２件装饰品。石制品中含典型的细石器。遗物分布在河流阶地砂砾层中。骨化石＾１４Ｃ测定文化遗址的年代为距今１万多年前。     

Changes in specific sequestration of protein during transport into the developing oocyte of the chicken

Coinjection of pairs of ¹²⁵I- and ¹³¹I-labelled proteins into the circulation of laying hens, demonstrated that not all stages in oocyte development had the same capacity to accumulate the injected proteins. With increasing size, up to 200 mg wet weight, small oocytes accumulated IgG (or γ-livetin) at rates which did not parallel those for other proteins: after 200 mg a parallelism was apparent.     

陕西洋县绿豆梁旧石器遗址出土的石制品

洋县绿豆梁遗址位于汉水北部一级支流金水河左岸的第四级阶地上。为了配合国家重点工程项目——南水北调西线“引汉济渭”工程的建设,2014～2015年对该地点进行了发掘,揭露面积126 m2,出土和采集不同类型的石制品656件。研究显示,早期人类加工石制品的原料来自于河漫滩或阶地古老砾石层中的砾石,岩性包括石英、石英岩、硅质灰岩、石英砂岩、花岗岩等。硬锤打击法是最主要的剥片方式。石制品包含石锤、石核、石片、石器、断块和碎屑等类型。遗址石器组合中既包括刮削器、尖状器、石钻等尺寸较小的轻型石器,也包含重型刮削器、砍砸器等重型石器。通过与位于相同阶地部位、相距2 km的金水河口遗址的测年数据和地层堆积序列对比,绿豆梁遗址的年代属于中更新世时期或更早的时段。     

Distribution of DDT residues (DDT,DDD, and DDE) in California soils

DDT residues (DDT, DDD, and DDE, or DDT_R) occur in detectable concentrations in soils from southern California over 20 years after a ban (1973) on the widespread use of the pesticide in the U.S. A comparison of DDT residues found in soils from western Riverside/San Bernardino Counties to a much larger statewide database of Mischke et al. (1985) suggests that a systematic regional variation in relative abundances of DDT_R exists in California soils. It is suggested that factors such as physical/chemical properties of DDT residues, local/regional soil‐forming processes, soil management practices, and climatological regimes may help to explain the observed relative abundances of DDT‐related species in California soils. Knowledge of regional trends in the concentrations and composition of soil DDT_R may be useful in formulating more rational risk‐based soil management strategies where soil DDT_R concentrations are at or above regulatory levels.     

Frequency and distribution of enamel hypoplasias in a historic skeletal sample

A skeletal sample of 296 individuals from a 19th century American poorhouse cemetery is examined for the frequency and chronological distribution of linear enamel hypoplasias on the mandibular canines and maxillary central incisors. Dental enamel hypoplasias may be considered to be indicators of increased exposure to health risk at the time of weaning. The purpose of this study is to examine childhood stress and provide a relative measure of that stress, as evidenced by hypoplasias, in a historic sample that represents an industrializing population. The frequency of enamel hypoplasias per individual by tooth ranged from 70 to 73%, with a peak age at stress of 2.5 to 3 years for the maxillary central incisor and 3.5 to 4 years for the mandibular canine. There were no significant differences in the presence of hypoplasias between males and females. The peak age at stress between 2.5 and 4 years in this 19th century sample transects the ranges reported for prehistoric populations (2-6 years) and for modern groups (0-3 years). These results indicate that the stress associated with weaning probably occurred earlier in incipient industrial societies than in prehistoric hunter/gatherers and agriculturalists, yet not as early as in modern industrial groups. The high level of childhood stress in this skeletal sample compared with that of other samples may indicate a change in health, at least among the lowest class, associated with the cultural transition from an agricultural to an industrial society.     

那坡县种子植物区系的特有现象

地处桂西南的那坡县迄今计有种子植物174科,889属,2201种。其中东亚特有科5个,中国特有属15个,那坡特有种39个。这一地区不仅植物种类丰富,而且特有现象较为显著。在15个中国特有属中,1属为那坡本地的的特有属,4属为苦苣苔科植物。中国特有种的各亚型以及39个那坡特有种所隶属的分布区类型的分析均表明,该植物区系具有强烈的热带亚洲特色。石灰岩山地的特有文化发展则是那坡植物区系的另一个显著特征,这种特有化发展在苦苣苔科中表现得尤为显著。     

浙江旧石器调查报告

2000年10—11月在湖州市辖区内开展旧石器时代考古调查,在安吉和长兴县发现了旧石器地点31处,其中5处发现于网纹红土等更新统的地层中。在安吉县发现了13个地点,找到石制品186件,长兴县18处,采到石制品147件,共计333件。石制品多粗大,与邻近的安徽和江苏发现的工业特征基本一致,同属南方主工业;它们的时代始于中更新世某一时段,一直延续到晚更新世。此项工作的结果,使中国境内再无旧石器时代文化的空白省,并扩大了南方主工业的分布区。