FPDock: Protein–protein docking using flower pollination algorithm

Proteins play their vital role in biological systems through interaction and complex formation with other biological molecules. Indeed, abnormalities in the interaction patterns affect the proteins’ structure and have detrimental effects on living organisms. Research in structure prediction gains its gravity as the functions of proteins depend on their structures. Protein–protein docking is one of the computational methods devised to understand the interaction between proteins. Metaheuristic algorithms are promising to use owing to the hardness of the structure prediction problem. In this paper, a variant of the Flower Pollination Algorithm (FPA) is applied to get an accurate protein–protein complex structure. The algorithm begins execution from a randomly generated initial population, which gets flourished in different isolated islands, trying to find their local optimum. The abiotic and biotic pollination applied in different generations brings diversity and intensity to the solutions. Each round of pollination applies an energy-based scoring function whose value influences the choice to accept a new solution. Analysis of final predictions based on CAPRI quality criteria shows that the proposed method has a success rate of 58% in top10 ranks, which in comparison with other methods like SwarmDock, pyDock, ZDOCK is better. Source code of the work is available at: https://github.com/Sharon1989Sunny/_FPDock_.     

ICP-AES法测定刺槐花中铁、锰、锌、铜

使用PTFE高压密封消化罐,用ICP－AES法同时测定刺槐花中Fe,Mn,Cu,Zn元素,回收率均在96－106％之间,相对标准偏差在7．9％以下,结果令人满意。     

毛泡桐花中总黄酮含量的测定

以70%乙醇为溶剂回流提取了毛泡桐花中黄酮类化合物,用3种显色方法对其紫外可见光谱进行了定性研究。结果表明,在硝酸铝显色法中,芦丁标准品和样品溶液的吸收峰一致,并且该方法稳定性好,精密度高(RSD=1.37%),重现性好(RSD=5.57%),回收率高(RSD=3.74%),操作简单方便,可适用于毛泡桐花提取液中总黄酮含量的测定。     

白族“苍洱境”理想家园的文化生态书写

明代杨黼《词记山花咏苍洱境》碑所描述的"苍洱境",是白族民间对理想家园的文化生态书写。杨黼对"苍洱境"理想家园的建构既熔铸了白族赖以生存的苍洱山水独特的自然精神,又融合了儒家文化和谐精神与释家禅悦空灵的意趣,体现了白族民间文化对理想家园的殷切期待。     

火焰原子吸收光谱法测定12种药用植物花中金属元素

采用浓硝酸-高氯酸(4+1)溶解消化方法进行样品处理,火焰原子吸收光谱法对12种药用植物花中Na、K、Ca、Mg、Zn、Fe、Cu、Mn、Cr、Pb、Ni、Co和Cd13种金属元素分析测定.研究测定不同元素仪器的最佳工作条件、方法的准确性、精密度及介质硝酸浓度对各元素测定结果的影响.结果表明:在实验范围内,硝酸浓度对测定结果无明显影响.12种药用植物花富含人体所需的金属元素Na、K、ca、Mg、Zn、Fe、Cu、Mn.研究发现同一品种不同地区的药用植物花中元素的含量存在一定的差异,同一地区同一品种不同时期采集的药用植物花中元素的含量也存在差异.该方法校准曲线线性关系良好(r=0.9969-1.0000),加标平均回收率在96.2%-109.9%,RSD平均值在0.55%-2.90%,在选定的测定条件下,各元素间相互无干扰,火焰原子吸收光谱法快速、简单,结果可靠.     

ICP-MS分析马莲花中的10种元素

目的 对马莲花中的微量元素进行分析.方法 采用微波消解法处理样品,利用电感耦合等离子体质谱法（ICP-MS）对马莲花中钾、钠、钙、镁、铜、铁、锌、锰、钼、镍等10种元素进行测定.所测元素校准方程的相关系数均大于0.999 0,回收率范围为90.2％ ～107.0％,相对标准偏差为1.54％～7.57％.结果 马莲花中含有丰富的钾、钙、镁等元素.结论 该法简便、快速、准确,灵敏度高,可用于马莲花中10种元素的同时测定.     

高校《花卉学》课程实践教学改革的探索

《花卉学》教学应改变以往重理论、轻实践的作法,科学调整讲授内容的顺序,建立完善的实践教学场所,运用现场教学和多媒体教学,独立设置实验课,改革成绩考核方法。采取多种措施,培养学生的实践能力,使学生的综合素质有了显著的提高。     

艺术探索的悲哀——从修辞学角度透视"百花"小说之批判

1956年,"双百"方针的提出及贯彻执行营造了文学史上的"百花时代",一批具有艺术探索价值的文学作品应时而生.1957年夏秋之交,"反右"运动扩大化波及文学界,"百花"小说作家被打成"右派",其作品也由"香花"变成"毒草"遭到粗暴批判.重新解读百花小说及其批判文章发现,百花小说的批判除了是一次"右派"作家的思想清算之外,更主要的原因则是艺术探索与时代语境的误置.     

CAT在花瓣衰老过程中的作用

紫叶桃(A．pemicaf．alroptnlmrea sohueid)、月季(R．chinensis jaca)的花辩在自然衰老过程中，过氧化氢酶(CAT)活性下降，脂质过氧化产物丙二醛(MDA)含量上升，本文通过对这两种物质之间相关性的研究，探讨了CAT在花瓣衰老中的作用。     

Blue metal complex pigments involved in blue flower color

The blue pigment of cornflower, protocyanin, has been investigated for a long time, but its precise structure was not entirely explained until recently. The molecular structure of the pigment was recently shown to be a metal complex of six molecules each of anthocyanin and flavone glycoside, with one ferric iron, one magnesium and two calcium ions by X-ray crystallographic analysis. The studies provided the answer to the question posed in the early part of the last century, “why is the cornflower blue and rose red when both flowers contain the same anthocyanin?” This work was achieved on the basis of the results of long years of the studies made by many researchers. In this review, the author focuses on the investigations of the blue metal complex pigments involved in the bluing of flowers, commelinin from Commelina commusis, protocyanin from Centaurea cyanus, protodelphin from Salvia patens and hydrangea blue pigment.