Phytosaur remains (Reptilia,Thecodontia)from the Upper Triassic of North-Eastern Thailand

The recently discovered late Triassic vertebratelocality at Chulabhorn Dam (North-Eastern Thailand) has yielded incomplete remains (jaw fragments and teeth) of phytosaurs, which are apparently indicative of a form related to Belodon and Rutiodon. They can be interpreted as showing that in the late Triassic North-Eastern Thailand was already biogeographically part of Laurasia.     

Cyclotosaurus cf. PosthumusFraas (Capitosauridae,Stereospondyli) from the Huai Hin Lat Formation (Upper Triassic), Northeastern Thailand: With a note on capitosaurid biogeography

Part of a large capitosaurid skull, similar to that of Cyclotosaurus posthumus from the Upper Triassic of Germany, has been discovered in the upper part of the Huai Hin Lat Formation near Chulabhorn (Nam Phrom) Dam. This discovery is consistent with the presumed Norian age of this formation. Although the phylogeny of the Capitosauridae is still unclear, the group of Upper Triassic Cyclotosaurus species to which C. posthumus belongs is monophyletic and seems to be known only from Laurasia or Northwestern Gondwana (Morocco). The occurrence of C. cf. posthumus in Thailand is consistent with the hypothesis previously put forward, that this part of Southeast Asia was bound to Laurasia in Mesozoic times.     

First record of Entelodontidae (Mammalia,Artiodactyla) from the late Eocene of Southeast Asia

We describe two entelodontid upper premolars that were recovered from the late Eocene of the Krabi coal mine in southern Thailand. The size and morphology of the material suggest that it can be referred to Entelodon aff. E. gobiensis, a species known from the late Eocene to the early Oligocene of northern Asia and southern China. The Thai material documents for the first time the southernmost occurrence of entelodontids in Asia during the Paleogene and also suggests that Eocene Southeast Asian mammal localities might potentially yield further entelodontid remains mostly associated with selenodont ungulates.     

贵州鼠尾草化学成分的研究

从贵州鼠尾草95%乙醇提取物分离得到8个化合物,通过理化性质及波谱方法分别鉴定为正三十三烷(1),十二烷酸十四烷酯(2),β-谷甾醇(3),胡萝卜苷(4),乌苏酸(5),2 a,3β-二羟基乌苏酸(6),白桦酸(7)和迷迭香酸(8)。以上化合物均首次从该植物中分离得到。     

中国大戟科一新归化种——硬毛巴豆

首次报道了大戟科(Euphorbiaceae)巴豆属硬毛巴豆(Croton hirtus L'Hér.)在中国的归化新记录,并提供该种的特征描述和形态图。凭证标本保存于中国科学院华南植物园标本馆(IBSC)。     

麦红吸浆虫滞育习性研究

1986～1991年研究了麦红吸浆虫的滞育习性,提出了该由主动延长滞育和被动延长滞育的两种形式,探讨了土壤湿度、温度对延长滞育的影响,从体重、羽化率、卵胚数、死亡率等方面测定了延长滞育幼虫的生殖势能,文章最后讨论了麦红吸浆虫多峰羽化的特点和延长滞育的生物学意义。     

桉树新害虫——曲线纷夜蛾的生物学和生态特性研究

曲线纷夜蛾Polydesma boarmoides Guenée是我国桉树食叶害虫,已在部分桉树种植区造成严重危害。国内外仅在区域昆虫种类调查中发现并提及该虫,而未见其生物学特性、生态学特性和发生规律等方面的相关研究报道,因此,有必要对该虫进行更系统、深入的研究,为防控该虫提供依据。笔者2013年5月首次发现该虫在广东省紫金县危害桉树林,2016年5月再次发现该虫在茂名市危害桉树林。调查、研究结果表明:(1)曲线纷夜蛾起始取食灌木叶片直至叶片被取食殆尽后,逐步转移至桉树林继续取食桉树叶片;(2)曲线纷夜蛾在广东地区1年发生4代;(3)曲线纷夜蛾3-5龄幼虫在桉树林间呈现聚集分布,且聚集密度呈现随种群密度增大而增大的规律,而在桉树树冠上则呈均匀分布。     

The Late Pleistocene Orangutan from Tham Prakai Phet: New discoveries

This paper describes the collection of isolated orangutan fossil teeth identified in the newly excavated material from Tham Prakai Phet, a site located in the Chaiyaphum Province in northeast Thailand. The collection is composed of 18 isolated teeth belonging to Pongo. The morphology of the upper and lower teeth is similar to that of fossil and extant orangutans from mainland Indochina and Indonesia. Only the wrinkles on the occlusal surface are less pronounced and sometimes simpler than extant orangutans. The dimensions of the teeth fall in the range of variation of fossil and extant specimens, but the distribution of the crown areas of the Tham Prakai Phet specimens fall above the mean value observed for extant orangutans. This new collection of continental orangutans confirms the persistence of this taxa in this part of Thailand up to the late Pleistocene, and provides new data useful for understanding the evolution of this hominoid and advance in the reconstitution of the evolutionary lineage of Pongo. The size of the sample from Tham Prakai Phet is not sufficient to determine an accurate taxonomic attribution; pending the increase of the current sample, we attribute the material to Pongo sp. (Pongo aff. weidenreichi).     

艾叶多糖提取率影响因素分析及提取条件优化

艾叶是菊科(Compositae)植物艾(Artemisia argyi Lévl.et Vant.)的干燥叶,为常用中药材之一,药用历史悠久,具有苦燥辛散、理气血、温经脉、逐寒湿、止冷痛等功效,为重要的妇科用药,可用于治疗脘腹冷痛、经寒不调、宫冷不孕等证.此外,利用艾叶预防瘟疫已有悠久的历史.现代药理研究表明:艾叶是一种广谱抗菌抗病毒中药,对多种病毒和细菌有抑制和杀伤作用,对呼吸系统疾病以及心血管等慢性疾病有一定的防治作用[1-3].因此,将艾叶中的有效成分分别提取和纯化并加以分析以及功能检测,具有深远意义.