Development and Validation of Stability indicating method for the estimation of Axitinib in tablet dosage forms by UPLC

A Stability Indicating Ultra-Performance Liquid Chromatography method was developed and validated for quantification of Axitinib in tablets. The chromatographic separation was done in an isocratic mode using the STD RP-18 Endcapped (50mm × 4.6mm, 2μ particle size) column. The mobile phase 0.1% OPA and acetonitrile 55:45 (%v/v) at the flow rate of 0.2mL/min and at ambient temperature was used. The wavelength used for detection was 249nm. The retention time for Axitinib was found to 1.03min. Axitinib was linear in the concentration range of 12.5μg/mL to 75μg/mL respectively. The developed method was validated and found to be accurate, specific and robust. The drug was subjected to the stressed conditions like acidic, basic, oxidative, photolytic, thermal and neutral conditions. The degradation results are found satisfactory. This method can be applied for the estimation of Axitinib in pharmaceutical dosage forms

Tolerance-Inducing Strategies in Islet Transplantation

Allogeneic islet transplantation is a promising approach for restoring normoglycemia in type 1 diabetic patients. Current use of immunosuppressive therapies for management of islet transplant recipients can be counterintuitive to islet function and can lead to complications in the long term. The induction of donor-specific tolerance eliminates the dependency on immunosuppression and allows recipients to retain responses to foreign antigens. The mechanisms by which tolerance is achieved involve the deletion of donor-reactive T cells, induction of T-cell anergy, immune deviation, and generation of regulatory T cells. This review will outline the various methods used for inducing donor-specific tolerance in islet transplantation and will highlight the previously unforeseen potential of tissue stromal cells in promoting islet engraftment

Data Privacy-AES Using Secure Hashing

Securing personal data in the public spaces is something to worry about, in particular, the privacy and the confidentiality. The Internet of Things (IoT) will be widespread all over the network to connect devices and the people through the Internet. However, maintaining privacy in public places has become a difficult task in the day-to-day life. This work is mainly concerned about the privacy and the confidentiality of the personal data in the public places

Design methods of Coanda effect nozzle with two streams

This paper continues recent research of the authors about the ACHEON Coanda effect two streams nozzle. This nozzle aims to produce an effective deflection of a propulsive jet with a correspondent deviation of the thrust vector in a 2D plane. On the basis of a previously published mathematical model, based on integral equations, it tries to produce an effective design guideline, which can be adopted for design activities of the nozzle for aeronautic propulsion. The presented model allows defining a governing method for this innovative two stream synthetic jet nozzle. The uncertainness level of the model are discussed and novel aircraft architectures based on it are presented. A CFD validation campaign is produced focusing on validating the model and the designs produced

Production and Partial Purification of a Neutral Metalloprotease by Fungal Mixed Substrate Fermentation

Five strains of fungi belonging to Aspergillus sp. were evaluated by casein agar plate assay and a wheat bran-based solid-state fermentation for selecting a neutral protease-producing culture. Based on the results, A. oryzae NRRL 2217 was selected for further studies. Sixteen different agro-industrial residues were evaluated for their potential to serve as a substrate for neutral protease production by this fungal strain. Results showed that a combination of coconut oil cake and wheat bran in the mass ratio of 1:3 was the best substrate for enzyme production. Various process parameters influencing protease production including fermentation time, initial moisture content, and fermentation temperature were optimised. The medium was supplemented with different nutrients in the form of organic and inorganic nitrogen and carbon sources. Supplementation of chitin increased the enzyme production significantly. Ammonium nitrate as inorganic nitrogen supplement slightly enhanced enzyme production. No organic nitrogen supplement was effective enhancer of enzyme production. Fermentation was performed under optimised conditions (initial moisture content V/m = 50 %, temperature 30 °C, 48 h). Partial purification of the enzyme resulted in a 3-fold increase in the specific activity of the enzyme. The partially purified enzyme was characterised by various features that govern the enzyme activity such as assay temperature, assay pH and substrate concentration. The effect of various metal ions and known protease inhibitors on the enzyme activity was also studied. The enzyme was found to be stable in pH range 7.0–7.5, and at temperature of 50 °C for 35 min. By the activating effect of divalent cations (Mg2+, Ca2+, Fe2+) and inhibiting effect of certain chelating agents (EGTA, EDTA), the enzyme was found to be a metalloprotease

Molecular Characterization of Macrophomina phaseolina, the Incitant of Coleus forskohlii Revealed by RAPD Markers

Coleus forskohlii belong to family lamiaceae is one of the commercial plants grown extensively in the country, the chemical found in the Coleus which has both medicinal application and gives great economy to the industrial organizations. Unfortunately, these plants are being highly succumbed to serious diseases like wilt and root rot caused by a fungus, hence the growers and industrialists are facing severe problem in safeguarding this crop in the field irrespective of the agro climatic conditions. Root rot disease, is one of the major diseases of Coleus forskohlii which, is caused by Macrophomina phaseolina , Pathogen variability was studied at both morphological and molecular level using cultural characteristics and Rapid Amplification of Polymorphic DNA (RAPD) analysis respectively. Totally thirty two isolates were isolated from roots of Coleus forskohlii . In RAPD 165 bands were obtained out of them 121 bands (73.3%) were polymorphic with a similarity coefficient of 0.48-0.66. Clusters analysis of RAPD data when Unweighted Pair Group Method with Arithmetic Mean (UPGMA) Tree constructed using NTSYS, it showed 6 groups. Among them two were major clusters and 4 were minor clusters with similarity coefficient 0.48-0.66. The pathogenicity of the isolates was tested on Coleus forskohlii plants. Analysis of the pathogenicity tests results revealed that the isolates grouped under two major clusters which were different from the one obtained using RAPD data. The results indicate that the data from RAPD analysis and Pathogenicity tests do not correlate with each other

Molecular authentication of green algae Caulerpa (Caulerpales, Chlorophyta) based on ITS and tufA genes from Andaman Islands, India

109-114Indigenous and non-indigenous invasive algal species introduction or prevalence is one of the major concerns to protect the native coastal environment. Globally, several studies have reported the effect of invasive alga Caulerpa on coral reefs. To establish the genetic variation between indigenous and non-indigenous invasive species, attempts have been made to develop molecular identification of Caulerpa algal species available at the Andaman Islands. In this study, 7 visually and morphologically different species belonging to the genus Caulerpa (Chlorophyta) were collected from the intertidal regions of South and Little Andaman Islands, India. The specimens were preliminarily identified based on the morphological characters and genetically mapped using ITS2 and chloroplast tufA gene markers. Six species of the Caulerpa viz. Caulerpa racemosa, C. racemosa var lamourouxii, C. racemosa var macrophysa, C. serrulata, C. fergusonii and C. microphysa were identified using ITS2 gene, and. C. mexicana var pluriseriata was identified using tufA gene. Two varieties, C. mexicana var. pluriseriata and C. racemosa var lamourouxii were found to be invasive to Indian waters. These were earlier reported in Red sea and in Phillipine waters in the pacific ocean. Further studies are needed to elucidate the genetic divergence of the Caulerpa species present in Andaman waters using different molecular markers

Morbidity, mortality and clinico-laboratory profile of COVID-19 related illness in children: a retrospective observational study from a tertiary care centre in India

Background: As India is poised for a third wave of SARS Co-V2 infection with a large unvaccinated pediatric population, it becomes imperative and pertinent for a study to find out its demographic, clinico-laboratory profile, and outcome in children with COVID-19 disease and its related illness.Methods: This is a retrospective observational study undertaken for Children and Adolescent admitted in the department of pediatrics of a teaching and tertiary care referral hospital, Delhi.Results: The median age of admitted children with COVID-19 disease was 11 years with an interquartile range 3 to 16 years. The median duration of hospital stay was 10 days (mean: 18±14 days). Mortality was 9/62 (14%). Recovery in non-severe (asymptomatic, mild, moderate) was 41/41 (100%), and in severe and critical illness including MISC was 42.8% (9/21). Mortality in severe and critical patients managed in SARI and COVID ward was 44% (8/18). Death among MISC patient in PICU was 33% (1/3). Difference in CRP rise was significant in severe and non-severe group of COVID-19 (p=0.017).Conclusions: Even though the morbidity and mortality associated with COVID-19 infection and related illness seems to be miniscule, the infection causes significant illness in the subgroup of children who requires hospitalization and can be fatal in those with comorbidity

Microbiology and Industrial Biotechnology of Food-Grade Proteases: A Perspective

Najnovija dostignuća u industrijskoj biotehnologiji omogućila su primjenu novih i neotkrivenih mikroorganizama i razvoj poboljšanih postupaka u proizvodnji enzima. To je povećalo prinose enzima i olakšalo razvoj djelotvornijeg industrijskog postupka proizvodnje. U ovom je radu opisana proizvodnja kiselih i neutralnih proteaza, osobito što se tiče proizvođača, postupaka proizvodnje i njihovih poboljšanja, te proizvoda i njegove primjene.Recent developments in industrial biotechnology have resulted in the exploitation of new and undiscovered microorganisms and the devising of improved methods for enzyme production, which have led to increased yields of the enzyme, thus making a viable industrial process feasible. This review tracks the developments in the field of acidic and neutral protease production with regard to the producers, methods of production and their improvement, the product and its applications

Optimization of Serine Protease Purification from Mango (Mangifera indica cv. Chokanan) Peel in Polyethylene Glycol/Dextran Aqueous Two Phase System

Mango peel is a good source of protease but remains an industrial waste. This study focuses on the optimization of polyethylene glycol (PEG)/dextran-based aqueous two-phase system (ATPS) to purify serine protease from mango peel. The activity of serine protease in different phase systems was studied and then the possible relationship between the purification variables, namely polyethylene glycol molecular weight (PEG, 4000–12,000 g·mol−1), tie line length (−3.42–35.27%), NaCl (−2.5–11.5%) and pH (4.5–10.5) on the enzymatic properties of purified enzyme was investigated. The most significant effect of PEG was on the efficiency of serine protease purification. Also, there was a significant increase in the partition coefficient with the addition of 4.5% of NaCl to the system. This could be due to the high hydrophobicity of serine protease compared to protein contaminates. The optimum conditions to achieve high partition coefficient (84.2) purification factor (14.37) and yield (97.3%) of serine protease were obtained in the presence of 8000 g·mol−1 of PEG, 17.2% of tie line length and 4.5% of NaCl at pH 7.5. The enzymatic properties of purified serine protease using PEG/dextran ATPS showed that the enzyme could be purified at a high purification factor and yield with easy scale-up and fast processing