Bioconversion of D-xylose to D-xylonic acid by Pseudoduganella danionis

Sugar acids are organic acids formed by the oxidation of carbonyl or hydroxyl group of monosaccharides to carboxylic acid group. D-xylonic acid derived via bioconversion of D-xylose is a promising platform chemical with various applications in food, chemical, agriculture, and pharmaceutical industries. The efficacy of a newly isolated culture identified as Pseudoduganella danionis to produce D-xylonic acid from D-xylose was investigated. The culture appeared to be potent for a feasible bioprocess development for xylonic acid production. Production medium containing 10 g/L D-xylose resulted in 6.5 g/L D-xylonic acid production after 120 h of incubation with 1% (v/v) inoculum of P. Danionis.

Dilute acid pretreatment and enzymatic hydrolysis of sorghum biomass for sugar recovery—A statistical approach.

Sorghum is one of the commercially feasible lignocellulosic biomass and has a great potential of being sustainable feedstock for renewable energy. As with any lignocellulosic biomass, sorghum also requires pretreatment which increases its susceptibility to hydrolysis by enzymes for generating sugars which can be further fermented to alcohol. In the present study, sorghum biomass was evaluated for deriving maximum fermentable sugars by optimizing various pretreatment parameters using statistical optimization methods. Pretreatment studies were done with H2SO4, followed by enzymatic saccharification. The efficiency of the process was evaluated on the basis of production of the total reducing sugars released during the process. Compositional analysis was done for native as well as pretreated biomass and compared. The biomass pretreated with the optimized conditions could yield 0.408 g of reducing sugars /g of pretreated biomass upon enzymatic hydrolysis. The cellulose content in the solid portion obtained after pretreatment using optimised conditions was found to be increased by 43.37% with lesser production of inhibitors in acid pretreated liquor.

Effectiveness of Management of HIV-TB Patients Under Programme Conditions in India.

HIV patients, on antiretroviral therapy (ART), with co-existing tuberculosis patients were assesed for clinical and immunological progress at GHTM ART centre for effectiveness of management programme. Six hundred and twenty two HIV-TB patients are placed under both Anti-TB Treatment (DOTS) and ART. While 337 patients are continuing their ATT, details of the remaining 283 patients are provided. 214 patients (76%) completed their treatment successfully. 29 patients (10%) expired before completing treatment for TB and 40 patients (14%) were treatment defaulters. Immunologicallly CD4 cells registered significant increase from 101(mean) to 306 (mean) in 202 treatment-completed patients (p=.001). Linking HIV patients on ART to their nearest DOTS centres for treating tuberculosis is feasible. High Mortality, even before completing the prescribed course of ATT is attributable to low immunity and complicating opportunistic infections. Referral and linkage services shall be improved and strengthened for enhanced treatment adherence.

Seasonal variations in incidence of severe and complicated malaria in central India.

The geographical position and climate of India is favorable for the transmission of malarial infection. The maximum prevalence of malaria in most parts of India is from July to November months. Rainfall provides mosquitoes, a breeding ground giving rise to epidemics. We studied the seasonal variation in cases of severe and complicated malaria presenting at MGIMS, Sevagram, Wardha (Vidarbha region in Maharashtra) over a period of three years. The findings of peak of malaria observed during September-November during three years period points to the fact that the increase in vector breeding after rainy season is responsible for the upsurge in the malarial cases during these months. This also indicates that this area (Vidarbha) has an unstable transmission of malaria.