六种苏铁属植物的羽片比较解剖学研究

研究了锈毛苏铁（Cycas ferruginea),石山苏铁（C.miquelii),四川苏铁（C.szchuanensis),海南苏铁（C.hainanensis),仙湖苏铁（C.fairylakea)和贵州苏铁（C.guizhouensis)等六种苏铁属植物羽片的比较解剖学,结果显示锈毛苏铁与石山苏铁在下皮层厚壁细胞,海绵组织中含晶细胞,中脉隆起,叶缘形态,韧皮部形态及分泌道的有无等特征上具有较明显的差异,四川苏铁与海南苏铁和仙湖苏铁非常相近;海南苏铁与仙湖苏铁基本一致;贵州苏铁在中脉隆起,叶缘形态,韧皮部形态等方面与四川苏铁,海南苏铁及仙湖苏铁三者有差异。支持将锈毛苏铁,石山苏铁独立为种的观点,并认为海南苏铁与仙湖苏铁不能区分,四川苏铁与海南苏铁和仙湖苏铁具有较近的种系关系,贵州苏铁与其它种的种系关系相对较远。     

六种苏铁属植物的羽片比较解剖学研究

研究了锈毛苏铁（Cycas ferruginea）、石山苏铁（C. miquelii）、四川苏铁（C. szechuanensis）、海南苏铁（C. hainanensis）、仙湖苏铁（C. fairylakea）和贵州苏铁（C. guizhouensis）等六种苏铁属植物羽片的比较解剖学,结果显示锈毛苏铁与石山苏铁在下皮层厚壁细胞、海绵组织中含晶细胞、中脉隆起、叶缘形态、韧皮部形态及分泌道的有无等特征上具有较明显的差异;四川苏铁与海南苏铁和仙湖苏铁非常相近;海南苏铁与仙湖苏铁基本一致;贵州苏铁在中脉隆起、叶缘形态、韧皮部形态等方面与四川苏铁、海南苏铁及仙湖苏铁三者有差异。支持将锈毛苏铁、石山苏铁独立为种的观点,并认为海 南苏铁与仙湖苏铁不能区分。四川苏铁与海南苏铁和仙湖苏铁具有较近的种系关系,贵州苏 铁与其它种的种系关系相对较远。     

中国大陆多毛类猫耳衣属一新记录种(英文)

报道了猫耳衣属多毛类地衣一中国大陆新记录种——小黑猫耳衣(Leptogium trichophoroides),与其他国家和地区相比,该种在中国大陆具有更宽的海拔分布范围和稍大的子囊孢子。     

Light- and Auxin-Induced Leaflet Opening in Detached Pinnae of Mimosa pudica

Leaflet pairs from detached pinnae of Mimosa pudica opened afterthe pinnae had been irradiated with light (2 W·m^–2)of 726 or 403 nm, whereas they remained almost closed with lightof 585 or 656 nm. Light-induced leaflet opening was observedonly in the daytime, from 6:00 to 16:00. Application of IAAat more than 30 µg/ml to the cut end of the pinna rachisesmade the leaflets open even in darkness with almost constantlag times of about 100 min which were independent of the concentration.NAA and 2,4-D also made the leaflet open at lower concentrationsthan IAA. Auxin-induced leaflet opening showed diurnal variation.Application of IAA for 2 to 6 min, depending on the concentration,was enough to open the leaflets. Autoradiography showed thatIAA was transferred from the cut end of a rachis throughouta pinna within 4 min. ¹Present address: Biological Institute, Faculty of Science,Kobe University, Kobe 657, Japan. (Received September 24, 1982; Accepted March 4, 1983)     

New Data on the Problem of Social Perception (A Person's Perception and Conception of Another Person)

Throughout the world at the present time more and more scientists are working on the problem of social perception. Though they are interested in different aspects of this problem, all are helping to elucidate the more or less complex features that characterize the process of how a human being forms images of other people and how he develops conceptions of their personalities. It was no slip of the pen when we included as a part of "social perception" the evolution of one's conception of another human being as a personality, for today the term "social perception" has been extended by most psychologists working on this problem to include the whole range of phenomena involved in one person's knowledge of another on the level of feeling as well as on the rational plane.     

托叶铁科(苏铁目)羽片脉序和羽片解剖学研究

详细研究了托叶铁科两属的2种代表植物Stangeria eriopus和Bowenia serrulata的羽片脉序和羽片解剖学,两个属在气孔器特征与不具副传输组织方面极为相似。而在气孔的分布,羽片脉序式样与叶缘形态,粘液道的有无,海绵组织与栅栏组织的分化。工字厚壁组织与表皮细胞垂周壁特征方面则有较大的差异。将这些特征与苏铁科和泽米铁科作了比较,并讨论了这些特征在系统学上的意义。研究结果支持Stevenson(1992)将该科分为两亚科以及托叶铁科是介入苏铁科与泽米铁科之间的观点。     

New Data on Dinosaurs of the Crimean Peninsula

Reexamination of the holotype of Riabininohadros weberae from the Upper Cretaceous (upper Maastrichtian) of the Crimean Peninsula (Besh-Kosh) allowed determination of previously unknown elements of the femur, astragalus, and calcaneus. This taxon shows a set of primitive characters observed in iguanodontids and basal ornithischians and is referred to as Styracosterna indet. The second dinosaur specimen from Crimea (Aleshino) is a fragmentary skeleton, including cervical and dorsal vertebrae. It possibly belongs to advanced iguanodontids or primitive hadrosauroids. Thus, in the Maastrichtian of the Crimean Peninsula, at least two dinosaur species coexisted.     

外源激素对何首乌毛状根生长及蒽醌类成分生物合成的影响

研究了外源激素对液体培养何首乌毛状根生长及其蒽醌类化合物生物合成的影响。结果表明外源激素2,4-D、NAA和6-BA对何首乌毛状根的生长及蒽醌生物合成有较大的影响。在MS培养基中添加2,4-D对何首乌毛状根的生长和蒽醌类化合物的生物合成有很强的抑制作用,而添加适量浓度NAA和6-BA则可促进何首乌毛状根的生长以及蒽醌类物质的生物合成。     

人参发根的诱导及其适宜培养条件的研究

利用发根农杆菌A₄菌株在人参根外植体上直接诱导产生发根。在1/2MS固体培养基上建立起发根离体培养系,经连续多代的培养,发根仍保持旺盛生长状态。PCR扩增结果表明,发根农杆菌R_I质粒的rolC基因已在人参发根基因组中整合并得到表达。液体培养基中发根生长速度约为固体培养的2倍。经对发根中人参皂苷含量及比生长速率的测定,筛选出高产发根系R9923。利用HPLC法测定了R9923发根系中单体皂苷Rg1、Re、Rf、Rb1、Rc、Rb2和Rd的含量,人参总皂苷含量达15.2mg/g。确定1/2MS培养液（30g/L蔗糖）、摇床转速110r/min、每２周更换一次培养液、继代培养时间4周,为人参发根生长适宜条件。探讨了培养容积、发根初始接种量以及分级放大培养工艺对发根大规模生产过程中生物产量和皂苷含量的影响。     

New Data on the Ichthyofauna of the South Vietnam Coast

Journal of Ichthyology - New findings were reported of nine fish species from the Congridae, Gonorhynchidae, Scorpaenidae, Serranidae, Nemipteridae, and Tetraodontidae families, of which seven...     

New Data on the Ontogeny of the Child's Sleep-Wake Rhythm

The present study is part of a broader body of research concerning the ontogeny and regulations of the young child's sleep-wake rhythm. It was carried out with 12 children admitted to a day-care center from 4 or 5 months of age. None of the children showed any anomalies or functional disorders. The method used in this study consisted in organizing a data collection on the alternations of wakefulness and sleep as well as on the children's behavior throughout the 24-h period, both in their family and at the day-care center from 4 to 15 months of age. The main findings are (a) the circadian rhythm of wakefulness and sleep is clearly set up as early as at 4 months of age and consolidates between 6 and 7 months; (b) some ages are characterized by significant changes in the daily distribution and duration of sleep spans: 6 to 7 months; 10to 12months; 13to 15 months; (c) these changes suggest the existence of several ultradian rhythmicities which become successively prevailing from one age to the next throughout child development. The longitudinal study of the young child's sleep-wakefulness rhythm allows better evaluation of the influence of developmental factors in its structuralization and formulation of new hypotheses on its disorders and dysfunction. Individual factors are under study.     

Isolation and Photoisomerization of a New Anthraquinone from Hairy Root Cultures of Sesamum indicum

An unstable anthraquinone was isolated from hairy root cultures of Sesamum indicum after preventing light throughout all experimental procedures. The structure of the (Z)-isomer of a previously isolated anthraquinone was determined to be 2-[(Z)-4-methylpenta-1,3-dien-1-yl]anthraquinone by spectroscopic methods. This compound was readily isomerized to the known (E)-isomer under light.     

不同理化因子对雪莲毛状根生长和总黄酮生物合成的影响

在 1 2MS液体培养基上研究了不同理化因子对水母雪莲毛状根生长和总黄酮生物合成的影响。实验结果表明 :氮源总浓度 (包括NH+4和NO-3)为 30mmol L ;NH⁺₄ NO^-₃比例为 5∶2 5 ;2 %蔗糖和 3%葡萄糖组合 ;0.5mg LGA₃和 0.5mg LIBA ;pH5.8;18h d的光照 (光强为 35.0.0lx) ;2.4℃ ;摇床转速为 100rmin有利于毛状根生长及总黄酮的生物合成。在此培养条件下 ,经过21d的培养毛状根生长量达到 12.8g L(DW) ,总黄酮合成量为 192.2mg L ,即总黄酮含量占毛状根干重的 15 % ,约为干重野生水母雪莲植株总黄酮含量的 2.5倍。