ABSTRACT
Withania somnifera (L.) Dunal (Fam. Solanaceae) commonly known as Ashwagandha has been used in traditional Indian medicine system from ancient times. Roots of the plant are being used in the preparation of many Ayurvedic medicines for treatment of many diseases. Many compounds have been reported and isolated from the roots, which mainly consists of withanolides, (steroidal lactones). In present study, the roots of 25 diverse W. somnifera genotypes were collected and evaluated for morphological parameters, such as root length, root diameter and dry root yield. Total alkaloids, crude fibers and starch content were also estimated from the dried roots of these accessions. TLC and HPLC revealed the presence of withanolide A in the methanolic extract of roots from diverse genotypes. Quantification through reverse-phase HPLC revealed varied concentrations of withanolide A in different genotypes grown under field conditions. Accumulation of withanolide A was reported highest in the genotype UWS-59 makes this genotype superior for medicinal use.
ABSTRACT
ABSTRACT Mungbean (Vigna radiata (L.) Wilczek) also known as green gram is an important source of protein in the category of food legumes. In the present study, SSR marker is used to analyze the genetic diversity amongst 23 genotypes of mungbean. Out of a total of 10 primers used for SSR analysis revealed generation of 15 alleles. The number of alleles per locus ranged from one (CEDG006, CEDG010, CEDG050, CEDG088, CEDG092 and CEDG232) to three (CEDG 214), with an average of 1.5 allele per primer. The index for expected heterozygosity was 0.29 ranging from 0.15 to 0.49 revealed a deficit in heterozygosity. The size of amplification products varied in case of each primer and the range was found to be 100 bp to 190 bp. 13 out of 15 alleles were found polymorphic. The average PIC value of SSR marker was found to be 0.205. The value of Jaccard's similarity coefficient had ranged from 0.28-1.00 with an average value of 0.64. The dendrogram constructed on SSR molecular marker data through UPGMA method and PCA using average linkage, had enabled grouping of the genotypes into three main clusters. Clustering pattern based on SSR marker data clearly indicated the narrow genetic base of mungbean genotypes that emphasizes the need to explore and exploit more number of germplasm from additional source to study genetic variation in mungbean for genetic improvement. The results indicated the marked usefulness of SSR in the assessment of genetic diversity in mungbean crop.
ABSTRACT
Metallic nanoparticles are traditionally synthesized by wet chemical techniques, where the chemicals used are often toxic and flammable. In the present study, the spore crystal mixture of Bacillus thuringiensis was used for the synthesis of silver nanoparticles. Nanoparticles were characterized using UV-Vis absorption spectroscopy, XRD and TEM. X-ray diffraction and TEM analysis showed the average particle size of 15 nm and mixed (cubic and hexagonal) structure. This is for the first time that any bacterial spore crystal mixture was used for the synthesis of nanoparticles. Further, these biologically synthesized nanoparticles were found to be highly toxic against different multi drug resistant human pathogenic bacteria.
ABSTRACT
Objective To compare the effectiveness of percutaneous catheter drainage (PCD) and percutaneous needle aspiration (PNA) in the management of large (>10 cm diameter) liver abscesses. Methods Seventy-two patients with liver abscess (amebic 48, pyogenic 24) were randomly allocated to PCD or PNA (36 each), which were done within 24 hours of admission. Both groups received parenteral antibiotics for at least 10 days. PNA was repeated every third day if the cavity size had not declined to 50% of the original for up to three times. Persistence of cavity or of clinical symptoms was considered failure of treatment. Duration to attain clinical relief, duration of hospital stay, complications, treatment failure, and deaths were recorded. Results PNA was successful in 31 of 36 (86%) patients (one aspiration in 10, two in 18, and three in 3 patients), whereas PCD was successful in 35 (97%) patients (p=ns). Duration to attain clinical relief (10.2 [2.0] vs. 8.1 [2.7] days; p=0.02) and parenteral antibiotics needed (15.5 [1.1] vs. 10.9 [2.7] days; p=0.04) were significantly lower in PCD group. Duration of hospital stay was similar in the two groups. One patient with PNA had a subcapsular hematoma and one with PCD had continuous bile leakage which stopped spontaneously. One patient in PCD group died. Conclusion PCD is a better treatment option than PNA for the management of large liver abscesses of size >10 cm, in terms of duration to attain clinical relief and duration for which parenteral antibiotics are needed.