COMPARATIVE ANALYSIS OF METAL NANOPARTICLES SYNTHESIZED FROM HIBISCUS ROSA SINESIS AND THEIR ANTIBACTERIAL ACTIVITY ESTIMATION AGAINST NINE PATHOGENIC BACTERIA

Objective: This study demonstates  a simple, cost effective protocol  for biosynthesis of stable silver (Ag) and gold (Au) nanoparticles from Hibiscus Rosa sinesis and their comparison by applying antibacterial activities against nine pathogenic bacterial species.Methods: Silver (Ag) and gold (Au) nanoparticles were biosynthesized from Hibiscus Rosa sinesis were characterized by UV–VIS spectroscopy, FTIR and TEM. The antibacterial activities  of AgNPs  and AuNPs were evaluated against  9 pathogenic bacterial species  Pseudomonas aeroginosa, Bacillus subtilis Micrococcus luteus, Staphylococcus aureus, Staphylococcus epidermidis, Enterobacter aerogens, Escherichia coli, Streptococcus pneumoniae, Aeromonas hydrophila by the agar disc diffusion method.Results: Synthesized AgNPs  were obtained in 13.01 to 28.14 nm size range, while AuNPs were in  6.32 to 18.19 nm size range. The results of Fourier transform infrared spectroscopy (FTIR) spectra indicates  that the AuNPs are bound to amine groups and the AgNPs to carboxylate ion groups. The antibacterial activities  of AgNPs,  the zone of inhibition significantly increased with the  increases of concentrations of AgNPs in all pathogenic bacterial species  except  in the case of S. epidermidis at 50%, S. aerogenes and A. hydrophila at 70%, while in case of AuNPs antibacterial activity  was displayed  only against B. subtilis at 20% and 100% concentration.Conclusion: This study suggests that AgNPs exhibits outstanding antibacterial activity against pathogenic bacteria as compared to AuNPs synthesized from Hibiscus Rosa sinensis leaf extract and insights to their potential applicability as an alternative antibacterial  agent in microbial and human health system to reduce the resistance ability of pathogenic bacteria.  Â

Curated genome annotation of Oryza sativa ssp. japonica and comparative genome analysis with Arabidopsis thaliana

We present here the annotation of the complete genome of rice Oryza sativa L. ssp. japonica cultivar Nipponbare. All functional annotations for proteins and non-protein-coding RNA (npRNA) candidates were manually curated. Functions were identified or inferred in 19,969 (70%) of the proteins, and 131 possible npRNAs (including 58 antisense transcripts) were found. Almost 5000 annotated protein-coding genes were found to be disrupted in insertional mutant lines, which will accelerate future experimental validation of the annotations. The rice loci were determined by using cDNA sequences obtained from rice and other representative cereals. Our conservative estimate based on these loci and an extrapolation suggested that the gene number of rice is ~32,000, which is smaller than previous estimates. We conducted comparative analyses between rice and Arabidopsis thaliana and found that both genomes possessed several lineage-specific genes, which might account for the observed differences between these species, while they had similar sets of predicted functional domains among the protein sequences. A system to control translational efficiency seems to be conserved across large evolutionary distances. Moreover, the evolutionary process of protein-coding genes was examined. Our results suggest that natural selection may have played a role for duplicated genes in both species, so that duplication was suppressed or favored in a manner that depended on the function of a gene

HBV carrier or chronic HBV infection: need for change in terminology

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Green Synthesized Nanoparticle Based Drug Delivery: Recent Trends and Future Prospects

This review highlights the scope for integrating green nanoparticle-based drug-delivery systems with Ayurveda and presents a compelling opportunity to bridge ancient healing wisdom with modern scientific advancements by bringing forward the recent advancements in the field of Ayurveda and nanomedicine. Combining the principles of Ayurveda with green nanoparticles offers an eco-friendly approach to drug delivery, aligning with Ayurvedic emphasis on natural remedies and sustainable practices. This convergence could lead to the development of envi-ronmentally conscious therapeutic solutions. The potential for enhanced therapeutic efficacy through targeted delivery of Ayurvedic bioactive compounds using green nanoparticles holds promise. This could potentially optimize treatment outcomes and reduce side effects, aligning with Ayurveda’s holistic approach to healing. By encapsulating Ayurvedic ingredients within green nanoparticles, the bioavailability and stability of herbal compounds can be addressed, po-tentially unlocking their full therapeutic potential. This aligns with Ayurvedic teachings on opti-mal absorption and assimilation of remedies. The personalized and targeted approach of Ayur-veda, combined with the precision of green nanoparticle-based drug delivery, could usher in a new era of individualized medicine. This convergence represents a powerful example of how the synergy between traditional knowledge and scientific progress can drive transformative ad-vancements in medicine

Synthesis of Metal Nanoparticals: A Biological Prospective for Analysis

Abstract. Nanotechnology is the design, characterization, production and application of structures, devices and systems by controlling shape and size at the nanoscale. It involves the production, manipulation and use of materials ranging in size from less than a micron to that of individual atoms from not only chemical approaches but also biological approaches. A wide range of nanophysics and nanostructures particles are being fabricated globally with the aim of developing clean, nontoxic and eco-friendly technologies. Use of ambient biological resources pathway such as microorganism and plant extract in this area of science is rapidly gaining importance owing to its growing success and simplicity. Currently, simple prokaryotes to complex eukaryotic organism's plants are used for the fabrication of MNPs and reaction solution was measured using UV-visible spectrophotometer showed a sharp plasmon peak at ~ 435 nm for silver, at ~ 330nm for lead, at ~ 410nm for cadmium and at ~ 523 for gold confirming the presence of metal nanoparticles. For deep analysis we are using different tools of characterization such as scanning probe microscopy (SPM), TEM, SEM and X-ray photoelectron spectroscopy. Further studies are required on precise and specific analysis of nanoparticles' production, including the nature and activity of diverse sizes of particles to optimize their production. This article presents a review of the ambient biological systems that may support and revolutionize the art of fabrication of metal nanoparticles from living material and the development of an updated knowledge base

Endoscopic variceal ligation plus propranolol versus endoscopic variceal ligation alone in primary prophylaxis of variceal bleeding

Background and Aims: The role of propranolol in addition to EVL in the prevention of first variceal bleed has not been evaluated. This prospective randomized controlled trial compared endoscopic variceal ligation (EVL) with propranolol and EVL alone in the prevention of first variceal bleed among patients with high-risk varices. Patients and Methods: One hundred and forty-four consecutive patients with high-risk varices were randomly allocated to EVL plus propranolol (Gr I, n = 72) or EVL alone (Gr II, n = 72). EVL was done at 2-wk interval till obliteration of varices. In Gr I, incremental dosage of propranolol (sufficient to reduce heart rate to 55 beats/min or 25% reduction from baseline) was administered and continued after obliteration of varices. The endpoints of the study were bleeding and death. Results: The two groups of patients had comparable baseline characteristics; follow-up (Gr I: 13.1 ± 11.5 months, Gr II: 11.2 ± 9.9 months), number of cirrhotic and noncirrhotic portal hypertension patients [Gr I 64 (88.6%) and 8 (11.4%), Gr II 63 (87.5%) and 9 (12.5%)], and frequency of Child's A (15 vs 18), B (38 vs 35), and C (19 vs 19). The mean daily propranolol dose achieved in Gr I was 95.6 ± 38.6 mg. Eleven patients had bleeds, 5 in Gr I and 6 in Gr II. All patients bled before the obliteration of varices, the actuarial probability of first bleed at 20 months was 7% in Gr I and 11% in Gr II (p= 0.72). Six patients died in the combination and 8 in EVL group. All deaths in Gr I were due to nonbleed-related causes, while in Gr II, 2 deaths were bleed related, the actuarial probability of death at 20 months was 8% and 15%, respectively (p= 0.37). The probability of bleed-related death was comparable (p= 0.15). At the end of follow-up, 4 patients in Gr I and 11 in Gr II had recurrence of varices (p= 0.03). Side effects on propranolol were seen in 22% patients, in 8% it had to be stopped. There were no serious complications of EVL. Conclusions: Both EVL plus propranolol and EVL alone are effective in primary prophylaxis of bleed from high-risk varices. Addition of propranolol does not decrease the probability of first bleed or death in patients on EVL. However, the recurrence of varices is lower if propranolol is added to EVL

Study of mode II interlaminar fracture toughness of laminated composites of glass and jute fibres in epoxy for structural applications

Composites are being used in the place of metals in many industries as they have a lower density and are cheaper than metals. In aerospace industries there is requirement for light weight together with strength, and reinforced fibre composites are superior in some critical properties compared with metals. In this study, laminated composites were fabricated with woven E-glass and jute fibres in an epoxy matrix by a hand layup method. The samples were prepared as per the relevant the America Society for Testing ad Materials (ASTM) standard and tested for mode II interlaminar fracture toughness to investigate delamination resistance. Mode II interlaminar fracture toughness was evaluated by an end-notched flexure test using three-point bending. The fracture toughness GIIC was calculated for a curing temperature range from 40 ◦C to 70 ◦C at intervals of 5 ◦C for different sets of laminated composites. The investigations revealed that when the curing temperature of laminated composites was increased from 40 ◦C to 70 ◦C, the interlaminar fracture toughness GIIC was increased in neat woven E-glass laminated composites, decreased in neat jute laminated composites, significantly increased in laminated composites with woven E-glass fibres in compression and jute fibres in tension and slightly increased when woven E-glass fibres were kept in tension and jute fibres in compression