Sorghum Insect Problems and Management

Sorghum (Sorghum bicolor) has high levels of starch,sugar,and fiber and is one of the most important energy crops in the world.Insect damage is one of the challenges that impacts sorghum biomass production.There are at least 150 insect species that can infest sorghum varieties worldwide.These insects can complete several generations within a growing season,they target various parts of sorghum plants at developmental stages,and they cause significant biomass losses.Genetic research has revealed the existence...     

Postvaccinal immunity to polio-viruses of children with chronic renal pathology

41 children with chronic renal diseases (with different forms of chronic glomerulonephritis or chronic renal failure) previously vaccinated with 5 to 9 doses of oral poliovaccine (OPV) were examined. Analysis of immunity to polioviruses revealed insufficient serologic protection against all three types of polioviruses compared with general population. Algorithm of yearly serologic examination as well as a schedule of additional vaccination against poliomyelitis depending on chronic renal pathology were developed.     

Phylogenetic analysis of the mycoplasma isolated from the Javanese macaque (M. fascicularis)

The nucleotide sequence of the fragment of 16S-aRNA of mycoplasma was determined. The fragment was identified using the PCR method in the urogenital scrape of the Javanese macaque (M. fascicularis). The sequenced fragment of mycoplasma of M. fascicularis was compared to well-known sequences of mycoplasma of mammals. The results of our comparative and phylogenetic analyses of the sequenced DNA fragment revealed that the mycoplasma belonged to the M. primatum species and fell within the same cluster as M. hominis. The mycoplasma M. primatum was for the first time observed in the monkeys M. fascicularis. The pathogenicity of the mycoplasma species with respect to monkeys is being studied.     

Biogeochemical processes in the algal-bacterial mats of the Urinskii alkaline hot spring

The structure and production characteristics of microbial communities from the Urinskii alkaline hot spring (Buryat Republic, Russia) have been investigated. A distinctive characteristic of this hot spring is the lack of sulfide in the issuing water. The water temperature near the spring vents ranged from 69 to 38.5°C and pH values ranged from 8.8 to 9.2. The total mineralization of water was less than 0.1 g/liter. Temperature has a profound effect on the species composition and biogeochemical processes occurring in the algal-bacterial mats of the Urinskii hot spring. The maximum diversity of the phototrophic community was observed at the temperatures 40 and 46°C. A total of 12 species of cyanobacteria, 4 species of diatoms, and one species of thermophilic anoxygenic phototrophic bacteria, Chloroflexus aurantiacus, have been isolated from mat samples. At temperatures above 40°C, the filamentous cyanobacterium Phormidium laminosum was predominant; its cell number and biomass concentration comprised 95.1 and 63.9%, respectively. At lower temperatures, the biomass concentrations of the cyanobacterium Oscillatoria limosa and diatoms increased (50.2 and 36.4%, respectively). The cyanobacterium Mastigocladus laminosus, which is normally found in neutral or slightly acidic hydrothermal systems, was detected in microbial communities. As the diatom concentration increases, so does the dry matter concentration in mats, while the content of organic matter decreases. The concentrations of proteins and carbohydrates reached their maximum levels at 45–50°C. The maximum average rate of oxygenic photosynthesis [2.1 g C/(m² day)], chlorophyll a content (343.4 mg/m²), and cell number of phototrophic microorganisms were observed at temperatures from 45 to 50°C. The peak mass of bacterial mats (56.75 g/m²) occurred at a temperature of 65–60°C. The maximum biomass concentration of phototrophs (414.63 × 10^?6 g/ml) and the peak rate of anoxygenic photosynthesis [0.42 g C/(m² day)] were observed at a temperature of 35–40°C.     

桃儿七光合生理特性的地理差异研究

对中国由南向北5个种源地桃儿七(Sinopodophyllum hexandrum)的光合生理生态特性进行了研究.结果表明:(1)北部宁夏六盘山地区植株的光饱和点(LSP)和光补偿点(LCP)最高,表观光量子效率(AQY)、瞬时光能利用效率(ILUE)和最大光合速率(Pmax)最低,光合能力最差;最南部云南纳帕海植株的LSP和LCP很低,但因其AQY和ILUE最高,故其Pmax最大,强光下的光合能力最高.(2)最南部云南纳帕海和最北部甘肃兴隆山个体的羧化效率(CE)最高,且CO2补偿点(CCP)较低,因此CO2利用率较高;而较南部四川刷经寺个体的CE最低,且CCP最高,故CO2利用效率最低.(3)各种源植株叶片的叶绿素总量及叶绿素a含量无显著差异,而不同地区个体的Chla/Chlb值差异显著,最北部甘肃兴隆山植株的Chla/Chlb值最大,而南部四川刷经寺的Chla/Chlb值最小.(4)各种源地植株的水分利用效率(WUE)和蒸腾速率(Tr)对光量子通量密度(PFD)与CO2浓度的响应过程也表现出显著的地理分异.总的来看,桃儿七是一种喜光但又较耐阴植物,但不同分布区桃儿七的光合生理生态特征已经出现了较显著的地理分化.     

A型肉毒毒素轻链基因的克隆及其结构分析

以献报道的A型肉毒毒素基因全序列为标准,设计并合成一对引物,自肉毒梭菌基因组中扩增出肉毒毒素轻链基因片段,并将扩增产物与pGEM—T载体在体外连接,构建测序重组质粒,进行测序和基因结构分析。PCR扩增获得了产物为1 364bp的DNA片段,测序结果与DNA数据库对照检索分析证明,此基因片段与GenBank中的A型肉毒毒素LC基因的一致性达99．9％以上,可以认为克隆的基因为A型肉毒毒素LC基因。     

卤虫染色体倍性组成的研究

本文报道了我国4个地理品系卤虫的染色体倍性组成及卵径分布,分析了卤虫染色体的非整倍性,讨论了卤虫种的分布。 天津卤虫有2倍体(2n=42),占33.3％和5倍体,占16.2％;染色体数的波动为21—108;卵径为262±17μm。 海南卤虫有2倍体(2n=42),占8％;4倍体,占17.7％;5倍体,占18.3％;染色体数的波动为16—111;卵径为285±15μm。 新疆卤虫有2倍体(2n=42),占39.2％;染色体数的波动为17—106;卵径为269±15μm。 山西卤虫有2倍体(2n=42),占45.1％,染色体数的波动为17—84;卵径为234±13μm。     

The psychophysiological testing of temperament]

A comparison was carried out of the dynamics of the activation focus of the human cerebral cortex with the data of psychological testing by the ergic parameter of the "Questionnaire for estimation of temperament structure". It is shown that the right hemisphere in the subjects conditionally attributed to the sting type ("highergice") is much more involved involving verbal tasks than in "week" types. In subjects conditionally attributed to the "week" type, at fulfillment of verbal tasks inert predominance of the left hemisphere activation is noted.