53 research outputs found

    Effect of Biocontrol Agent Pseudomonas fluorescens 2P24 on Soil Fungal Community in Cucumber Rhizosphere Using T-RFLP and DGGE

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    Fungi and fungal community play important roles in the soil ecosystem, and the diversity of fungal community could act as natural antagonists of various plant pathogens. Biological control is a promising method to protect plants as chemical pesticides may cause environment pollution. Pseudomonas fluorescens 2P24 had strong inhibitory on Rastonia solanacearum, Fusarium oxysporum and Rhizoctonia solani, etc., and was isolated from the wheat rhizosphere take-all decline soils in Shandong province, China. However, its potential effect on soil fungal community was still unknown. In this study, the gfp-labeled P. fluorescens 2P24 was inoculated into cucumber rhizosphere, and the survival of 2P24 was monitored weekly. The amount decreased from 108 to 105 CFU/g dry soils. The effect of 2P24 on soil fungal community in cucumber rhizosphere was investigated using T-RFLP and DGGE. In T-RFLP analysis, principle component analysis showed that the soil fungal community was greatly influenced at first, digested with restriction enzyme Hinf I and Taq I. However, there was little difference as digested by different enzymes. DGGE results demonstrated that the soil fungal community was greatly shocked at the beginning, but it recovered slowly with the decline of P. fluorescens 2P24. Four weeks later, there was little difference between the treatment and control. Generally speaking, the effect of P. fluorescens 2P24 on soil fungal community in cucumber rhizosphere was just transient

    Structure and properties of vacuum deposited cadmium telluride thin films

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    705-708Systematic and detailed study of the growth and properties of vacuum deposited cadmium telluride thin films was made. Both p- and n-type films were grown and these films were characterized for their structural, optical, and electrical properties. The crystallographic structure of the deposits was found to be dependent on the rate of deposition. Low deposition rates were observed to result in hexagonal deposits whereas high rates of deposition favoured cubic structure for the film. Electrical and optical properties were also found to be dependent on the deposition parameters

    Relevance of ratio of neck circumference to thyromental distance in predicting difficult intubation

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    Background and Objectives: Airway assessment is the most important aspect of anaesthetic practice as a difficult intubation may be unanticipated. A study was done to know the relevance of ratio of neck circumference to thyromental distance in predicting difficult intubation in general Indian population coming for surgery. Materials and methods: 500 Patients with ASA PS I& II were enrolled in the study were preoperatively assessed for airway parameters such as Modified mallampati classification, thyromental distance, sternomental distance, neck circumference to thyromental distance ratio and Wilson score. Intra-operatively all patients were classified according to Cormack and Lehane laryngoscopic view. Results: The mean age, Weight, Height and BMI of patients in our study was 34.43 years, 61.07 kg,69.2cms and 21.2 respectively. In our study we had a total of 15 difficult intubation with all of them belonging to Cormack-Lehane grade III. In our study we noted that among 15 patients with CLIII/IV only 4 had a SMD≤15.75 cm. With that we noted a sensitivity, specificity, PPV and NPV of 26.7%,75.1%,3.2% and 97.1%. Among 15 patients with CLIII/IV only 2 of them had Wilson score of more than 3.&nbsp
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