云南景颇族的体质特征

本文调查了云南景颇族261人（男105人,女156人）。年龄为成年人（男24－60岁,女23－55岁）。主要测量均值与现代中国汉族和云南省各少数民族比较和聚类分析的结果表明,景颇族属黄种人的东亚类型,但也有南亚类型特征表现。体质特征与傣族、哈尼族和彝族接近,与基诺族和布郎族较远。     

A ferredoxin-type iron-sulfur protein gene,frx B,is expressed in the chloroplasts of tobacco and spinach

Previously, a ferredoxin-type iron-sulfur protein, frx B protein, was identified in a high-salt extract of the purified thylakoid membrane of Chlamydomonas reinhardtii, a unicellular green alga. Polyclonal antibody was raised against a synthetic pentadecameric peptide with an amino acid sequence corresponding to the highly conserved region of the putative frx B proteins of 3 land plants [21]. In this report, protein(s) reacting strongly and specifically with this antibody was detected in the equivalent high-salt extract prepared from purified chloroplast of spinach and tobacco. One strong reaction polypeptide band from tobacco chloroplast was purified from SDS-polyacrylamide gel and subjected to endoproteinase lys C digestion. The resulting polypeptides were separated by reversed-phase chromatography. N-terminal sequencing of 3 purified polypeptides revealed that the protein is encoded by the frxB gene identified from DNA sequence analysis.     

湘南山区农业生态系统能量分析

一、引言由于农业系统的复杂性和存在较多的随机因素,对农业系统实行全面定量研究是比较困难的,仅从定性的描述和一些经济指标来判定系统的优劣及系统的特征是不理想的。而从能量观点对农业生态系统加以分析则是一个全面且能定量的方法,并且具有较强的客观性,能够反映农业生态系统最基本、最本质的关系。     

山东省的菌根真菌及分布

1842年Vittadini观察到树木小根可以从在其上面形成根套的真菌中获得营养。1885年Frank发展和完善了Vittadini 的观察,提出     

吉林省寄螨亚科三新种(啤螨目:寄螨科)

本文记述寄螨亚科(Parasitinae)三新种。模式标本保存于吉林省地方病第一防治研究所。文内测量单位为微米,括号内为测量平均值。     

广东种子植物区系地理成分研究

广东种子植物区系共有２１９科１４３４属４９８６种。其中：①热带区系成分占有较大的比例,约占非世界属的６２．３％,表明广东区系受到热带区系的强烈渗透,次之为亚热带（至亚热带山地）成分约占３２．２％,及中国特有分布占５．６％;②以单型属（７２属）,单种属（５８５属）和寡种属（５６２属）占绝对优势,共占８５．０％,充分显示了广东区系的古老性和过渡性特点;③从区系组成和植被结构的特征成分来看,以华夏植物区系成分为主,包括：亚热带分布,亚热带山地分布,中国特有分布,东亚—北美间断分布,及一些亚洲热带分布中以亚热带为主的属：④在这些属中有东亚特有属１３２属,中国特有属７５属以及华南—西南—中南半岛特有属６８属等;这些属的存在毫无疑问地说明,广东区系是华夏植物区系的核心地区之一,同时也显示了热带区系与亚热带区系有着不可分隔的统一性。     

DEVELOPMENT, SEXUAL DIMORPHISM, and INDIVIDUAL VARIATION IN THE SKELETON OF THE FINLESS PORPOISE, NEOPHOCAENA PHOCAENOIDES, IN THE COASTAL WATERS OF WESTERN KYUSHU, JAPAN

Development, sexual dimorphism, and individual variation were examined in the skeleton of the finless porpoise in the coastal waters of western Kyushu, Japan. Skulls ceased growing by 4 yr. Postcranial skeletons ceased increasing in size at an age older than 11 yr. The finless porpoise was estimated to attain cranial maturity by 4 yr and physical maturity at 14–23 yr. Sexual dimorphism was not detectable in most of the cranial characters but was detected in more than half of the postcranial characters. Females tended to show larger values of postcranial characters. The shape of the pelvic bone was obviously different between males and females. Thus, a discriminant function was proposed to determine sex using measurements of this bone. Individual variation was greatest in the feeding apparatus such as length of the rostrum, and least in the braincase.     

南丹相泥盆系中的翼口蛤类

滇西晚石炭世 Triticites 带的苔藓虫,产于施甸的10种,内含1新种,群体形状单一,生活于温暖、清洁、高能、面向外海的硬基底浅海区;产于腾冲的只有1种,是低能深水特提斯区分子.早二叠世苔藓虫12种,内含1新种,产耿马永德组 Polydiexodina 带之下,系特提斯区分子,据对其中的3层苔藓虫的硬体类型及标本数量分析,耿马含苔藓虫地层代表一个海侵过程.     

AGE, GROWTH, AND REPRODUCTION OF THE FINLESS PORPOISE, NEOPHOCAENA PHOCAENOIDES, IN THE COASTAL WATERS OF WESTERN KYUSHU, JAPAN

Abstract: In the coastal waters of western Kyushu, Japan, a total of 97 incidentally taken or stranded finless porpoises, Neophocaena phocaenoides , was collected for studying age, growth and reproduction. An additional 17 specimens from the Inland Sea were used for a comparison of life history. Mean neonatal body length was 78.2 cm. Both males and females grew to around 140 cm by 5 yr of age. The maximum body lengths of males and females in western Kyushu were 174.5 cm and 165.0 cm, respectively, which were smaller than those recorded in other Japanese waters. Females probably attain sexual maturity at ages of 6–9 yr and at body lengths of 135–145 cm. Males probably mature sexually at ages of 4–6 yr, at body lengths of 135–140 cm and at weight of testis of 40–150 g. The lack of females aged 5–6 yr and males aged 4–5 yr precluded firm conclusions on ages at sexual maturity. Parturition in western Kyushu was estimated to be prolonged from autumn to spring, whereas in the Inland Sea and Pacific waters it was restricted from spring to summer with a peak in April. These geographical differences and available information on distribution implies that the finless porpoises in western Kyushu constitute a local population.