Measuring and locating zones of chaos and irregularity

The new measures computed here are the spectral detrended fluctuation anatysls （sDFA） and spectral multi-taper method （sMTM）. sDFA applies the standard detrended fluctuation analysis （DFA） algorithm to power spectra, sMTM exploits the minute increases in the broadband response, typical of chaotic spectra approaching optimal values. The authors chose the Brusselator, Lorenz, and Duffing as the proposed models to measure and locate chaos and severe irregularity. Their series of chaotic parametric responses in short time-series is advantageous. Where cycles have only a limited number of slow oscillations such as for systems biology and medicine. It is difficult to create, locate, or monitor chaos. From 50 linearly increasing starting points applied to the chaos target function （CTF）; the mean percentage increases in Kolmogorov-Sinai entropy （KS-Entropy） for the proposed chosen models; and p-values when the models were compared statistically by Kruskal-Wallis and ANOVA1 test with distributions assumed normal are Duffing （CTF： 31%： p 〈0.03）; Lorenz （CTF： 2%： p 〈0.03）, and I3russelator （CTF： 8%： p 〈0.01）. Principal component analysis （PCA） is applied to assess the significance of the objective functions for tuning the chaotic response. From PCA the conclusion is that CTF is the most beneficial objective function overall delivering the highest increases in mean KS-Entropy.     

细胞生物学实验创新性教学改革初探

就细胞生物学实验教学中课程内容设置、创新性教学改革的实施、构建多元评价体系进行了教学实践,取得了较好的教学效果.     

肽核酸在分子生物学技术和疾病治疗方面的应用（综述）

肽核酸是一种以多肽为骨架，类似核苷酸的物质，肽核酸与DNA或PNA有高度的亲和力和特异性，能够抑制基因的转录和翻译过程，在分子生物和肿瘤，艾滋病，病毒感染和其它难治性疾病的治疗方面有着广泛的应用前景。     

Biology of a nocturnal bee,Megalopta atra (Hymenoptera: Halictidae; Augochlorini), from the Panamanian highlands

Bees of the genus Megalopta have gained attention as a result of their social nesting and nocturnal foraging. Seventeen nests of Meglaopta atra from the highlands of Chiriqui Province, Panama, were collected at the end of the dry season when brood rearing is expected to be at its peak. Most nests contained single females; within multifemale nests only one female possessed enlarged ovarioles, although some non‐reproductive individuals were inseminated. In two of these nests reproductive individuals were clearly larger in body size than nestmates, but body size variation and macrocephaly were equivalent to those found in other Neotropical augochlorines. There was no evidence of a non‐reproductive worker‐like caste and multifemale nests did not appear to be more productive than solitary nests, which may represent pre‐reproductive assemblages. Megalopta atra appears to be isolated by altitude from co‐geners common in Panama, this is discussed in comparison with temperate halictine bees, in which environmental clines separate solitary from social populations.     

生物类综合实践活动课程评价研究

通过对新课程标准下生物类综合实践活动课程的内涵、变革及不同的评价方式进行研究,提出当前评价在综合实践活动中的重要性,并分析各种评价方式的利弊,以使实践活动评价能更好地反作用于活动本身.各种评价方式应注意与现实生活相结合,综合利用,促进学生和教师共同发展.     

世界小麦生产上的危险性病害-小麦印度腥黑穗病

介绍了世界检疫性病害小麦印度腥黑穗病的生物学特性、危害特点及其分布,重点分析了该病害流行趋势和所需的气候条件,为防治该病传入我国,更好保护我国的小麦生产安全提供依据。     

运动训练与心钠素

通过文献资料综述,阐述了不同强度运动训练血浆心钠素水平的影响,分析了运动时影响心钠素释放的因素,研究了运动时心钠素的生物学效应.     

生物语言:理查德·鲍威尔斯《金虫变奏曲》中的生物学与信息(Ⅰ)

《金虫变奏曲》一书中光怪陆离的世界被用来类比鲍维尔斯的思维过程.本文研究书中这一世界所代表的科学事物,以及一些重要领域之间的交互网络的出现给生物学范式所带来的变化.本文还研究了科学家们在研究基因组的无限性时使用控制论改造分子生物学的种种方法.     

Reproductive biology and prospects for conservation ofCaldesia parnassifolia (Alismataceae)—A threatened monocot in China

Caldesia parnassi folia (Bassi ex Linn.) Parl. in China has declined in number in recent years and is increasingly faced with the risk of extirpation arising from anthropogenic changes associated with rapid urbanization and expansion of both agriculture and infrastructure. To aid in provision of the data needed for effective conservation of the species, studies on the habitat, pollination ecology, and breeding system ofC. parnassi folia were carried out on natural populations occurring in Southeastern China. Flowering in the study populations extended for more than eighty days beginning in early summer. Floral anthesis occurred in the morning hours and proceeded rapidly, lasting about 45 min. Flowers lasted ca. 8 h.Caldesia parnassi folia is self-compatible; however autogamy resulted in lower seed set than geitonogamy and xenogamy as well as free pollination. The data on pollen/ ovule (P∶O) ratio is consistent with a partially selfing and outcrossing mating system. Interpopulational crosses yielded similar seed set to within-population crosses. Agamospermy did not occur in the study populations. Propagation is achieved through seeds as well as through turions which commonly occur in the inflorescences. Flies (Insecta; Diptera) were the most frequent visitors to the flowers ofC. parnassi folia; however bees (Insecta; Hymenoptera) composed a larger proportion of effective pollinators. The Syrphidae speciesSphaerophoria indiana (Bigot) presents evidence of oligolectic foraging behavior. Recommendations are made on the immediate steps necessary for conservation ofCaldesia species in China. Foundation item: Supported by the State Key Basic Research and Development Plan of China (973) (G2000046805) and the National Natural Science Foundation of China (30070055) Biography: Robert Wahiti, Gituru (1967-), male, Kenya, Ph. D., research direction: plant biosystematics.     

大鼠生殖道肺支原体的分离与探讨

从１１只普通雌性大鼠生殖道分离出７株肺支原体，同时从它们的呼吸道也分离出肺支原体；另有１只大鼠生殖道和呼吸道均未分离出肺支原体。从该试验说明生殖道也可感染肺支原体。