贵州省野生秋海棠属植物观赏特性及应用研究

经过2年的野外调查及查阅相关资料,列出产于贵州省的秋海棠共32种(包括1个变种)主要分布地与叶花特征.认为它们具有奇特的叶形和多彩的叶色,花色素雅而且花形美观,是有待开发的极好花卉.根据形态特征和生态习性进行园林配置分析,对园林开发应用提出建议.     

The distribution of topically applied heavy metals in the soil

Summary Long-term pot experiments were conducted to determine the leaching potential of topically applied lead, cadmium, and nickel through the soil. Four rates of each metal (0, 10, 100 and 200 mg/kg soil), in the nitrate form were used. Metals were extracted with acidic ammonium acetate after 30 weeks of intermittent leaching. The concentration of extractable element varied with the depth in the soil and the type of extractable metal. Lead was confined to the upper few centimeters of soil whereas cadmium moved down to a considerable depth. Nickel was more uniformly distributed over the total soil depth than the other two metals. The concentration gradients observed are discussed with respect to their effect on germination and yield of plants.     

Effects of Field Application of Tebuconazole on Yield, Yield Components and the Mycotoxin Content of Fusarium-infected Wheat Grain

Winter wheat cultivar Basalt was artificially inoculated with Fusarium culmorum at the end of anthesis and treated with the systemic fungicide tebuconazole (Folicur^®) a few days before and/or after inoculation. Check plots remained uninoculated and unsprayed. Head infections, yield, yield components and the percentage of Fusarium‐ infected kernels were determined. Artificial Fusarium inoculation lowered yield significantly by 24.2‐45.0%. Any fungicide treatment saved yield, thousand grain weight and kernel numbers per head. Pre‐infectional application of tebuconazole was superior to application carried out post‐infection. Moreover, the fungicide controlled deoxynivalenol (DON) synthesis in the field to a considerable extent, and enabled good control of Fusarium head blight, glume blotch and the percentage of Fusarium‐infected kernels. The levels of Fusarium kernel infection after harvest clearly reflected the DON content of w heat grain.     

The Biotechnology of Bacillus Thuringiensis

Abstract

Gibberellins are a classic example of the production of plant growth regulators by microorganisms. They are important biotechnological products and are increasingly used in agriculture and horticulture.

This article intends to assemble information on the history of the identification of gibberellins (GA) and producing microorganisms, especially Gibberella fujikuroi (Saw.) Wr. Furthermore, the biosynthesis of gibberelins through the isoprenoid biosynthetic pathway will be described. The main product of GA biosynthesis in Gibberella fujikuroi is gibberellic acid (GA₃), which is formed from GA₄ via GA₇. Both the amount and the type of gibberellins produced by the fungus are dependent on the genetic constitution of the strain and the fermentation conditions.

Mutation and selection for increased product formation are probably the most important factors in improving the yield of gibberellins. Some publications concerning methods of parasexual recombination will also be summarized. Beside strain improvement of wild strains, medium development and appropriate cultivation techniques (batch, fed-batch-, continuous-, and solid state-fermentation) are very important prerequisites for successful economy of gibberellin production. Furthermore, the most important ways of gibberellin recovery and purification are described. Continuing reductions in the costs make gibberellins more attractive for existing applications and open possibilities for further applications of GA₃ and some other active gibberellins like GA₄, Ga₇, and GA₉     

探讨CT技术在肺结节疾病诊断中的应用

目的：探讨CT技术在肺结节疾病诊断中的应用。利用CT技术提供的影像学特征,及时准确的诊断肺结节疾病,从而更具体更全面的提高对该疾病的认识,减少误诊的发生。方法：回顾性分析我院2010年-2012年确诊的符合相应临床诊治标准的肺结节患者48例的临床资料,通过CT扫描分析其具体的特征表现。结果：在所选的48例中,纵隔淋巴结增大45例,双侧肺门淋巴结增大44例,胸部淋巴结增大患者48例。肺部病变者33例,其中单发结节患者2例,多发结节患者25例,支气管血管束增粗者14例,磨玻璃样影案例者9例,实变案例5例。胸膜病发患者13例。结论：我们通过分析发现,胸部有典型影像学表现形式的肺结节病例诊断较容易,无典型影像学表现的患者诊断较为困难。因此我们认为利用CT技术诊断肺结节疾病具有特异性意义,值得临床医生重视。     

固定化细胞技术及其应用研究进展

细胞固定技术是将具有特定生理功能的生物细胞用一定的方法进行固定,并以其作为生物催化剂加以利用的一门技术。相对于游离的单细胞,固定化细胞可简化生产工艺,降低生产成本。本文回顾了细胞固定技术在制备方法和载体材料等方面的研究进展,并总结了近几年来固定化细胞技术在新能源开发、食品加工及环境污染物处理中的应用,对其发展前景进行展望。     

综述——纳米材料与药物输递：脂质纳米粒在口服给药系统中的应用

脂质纳米粒是由固体脂肪酸或其酯类制成的一类纳米制剂,其生物相容性好、安全性好,所以在药物递送领域受到广泛关注．难溶性药物、多肽及蛋白质药物由于溶解度、跨膜能力以及稳定性等问题,导致口服生物利用度低,而利用脂质纳米粒作为其载体,口服给药后能显著改善药物的生物利用度,这使得脂质纳米粒在口服给药系统中得到了广泛的应用与研究．本文从口服脂质纳米粒的处方、制备工艺、吸收机制以及应用四个方面对其进行了详细的综述．     

XXIst century magnetotherapy

Abstract

This paper discusses the state of the art therapeutic application of magnetic and electromagnetic fields (EMF) in treatment of various medical problems – from pain relief to musculoskeletal trauma, to vascular and endocrine disorders. The paper describes problems related to physical parameters of used fields, biophysical dosimetry, clinical protocols, and safety of the device operators. Clinical benefits and mechanisms of action are also discussed.