Post curing of Hansa-3 (VT- HNW) Components

This report contains the detads of post curing of Hansa-3 (VT- HNW) all composite airframe components provided byC-CADD, carried out using an in-house designed and fabricated large hot air oven (17mts x 2.0mts x 2.0mts). It details an optimum post cure cycle implemented, the temperature accuracy's, the various innovative approaches adapted to ensure the safety of the full scale components undergoing post cure in the oven. All the Hansa-3 (VT-HNW) airframe composite components post cured as per the standard optimum post cure cycle and the oven temperature monitored throughout around f 3degree C to ensure uniform post curing of components

High Grade Phosphate from Syrian Phosphate at Eastern Mines

Syria is one of the major sedimentary rock phosphate producing countries in the Middle East from the Khneifiss, Eastern "A" and Eastern "B" mines. The phosphate rock of Syrian mines is being upgraded by increasing P205 content to higher values (>28%) suitable for fertilizers and other industries. But it is not always possible to do so due to interlocking of other contents such as the higher CaO/P,05 ratio, and the high chlorine and R,03 (Fe203+A1203) contents

Beneficiation of Bababudan Low Grade Magnetite ores - A Technical Appraisal

The horse-shoe shaped Bababudan range of low grade magnetite ore deposits in the western part of Karnataka State, India, is distributed over a length of about 25 kms. The deposits have for convenience, been divided into three continuous blocks viz., Rudragiri, Attigundi and Mahal. The huge ore reserves, proximity to the Manglore Port for possible export of iron ore and connection with Bangalore and Manglore cities through national highways, make these deposits prospective for exploration

Vegetative vigour, yield and field tolerance to leaf rust in four F1 hybrids of coffee (Coffea arabica L.) in India

Four F1 hybrids of arabica coffee (Coffea arabica L.) developed with the primary objective of pyramiding the SH3 gene for leaf rust resistance in a commercial variety ‘Chandragiri’ for achieving the long-lasting resistance to leaf rust, have been evaluated in field. Two hybrids (S.5083 and S.5084) were derived from a donor heterozygous to SH3, while the other two hybrids (S.5085 and S.5086) were developed from donor homozygous to SH3. Among the hybrids, S.5086 recorded superior yield performance during individual years with a maximum yield of 1611 kg/ha during 2020-21 and the four year mean yield of 1313 kg/ha. The hybrid exhibited maximum heterosis over mid parent (29.10%) and better parent (17.12%) and S.5086 progeny also manifested high field tolerance to leaf rust pathogen as the entire plant population was free from the disease incidence throughout the study period. The findings of the present study established the efficiency of F1 breeding strategy with simultaneous pyramiding of rust resistance genes for development of vigorous, high yielding and durable rust resistant F1 hybrids in arabica. The F1 hybrid, S.5086 with promising performance in terms of crop yield and high field tolerance to leaf rust has potential implications for commercial exploitation

Top-Gated Chemical Vapor Deposited Mos2 Field-Effect Transistors On Si3N4 Substrates

We report the electrical characteristics of chemical vapor deposited (CVD) monolayer molybdenum disulfide (MoS2) top-gated field-effect transistors (FETs) on silicon nitride (Si3N4) substrates. We show that Si3N4 substrates offer comparable electrical performance to thermally grown SiO2 substrates for MoS2 FETs, offering an attractive passivating substrate for transition-metal dichalcogenides (TMD) with a smooth surface morphology. Single-crystal MoS2 grains are grown via vapor transport process using solid precursors directly on low pressure CVD Si3N4, eliminating the need for transfer processes which degrade electrical performance. Monolayer top-gated MoS2 FETs with Al2O3 gate dielectric on Si3N4 achieve a room temperature mobility of 24 cm(2)/V s with I-on/I-off current ratios exceeding 10(7). Using HfO2 as a gate dielectric, monolayer top-gated CVD MoS2 FETs on Si3N4 achieve current densities of 55 mu A/mu m and a transconductance of 6.12 mu S/mu m at V-tg of -5V and V-ds of 2V. We observe an increase in mobility at lower temperatures, indicating phonon scattering may dominate over charged impurity scattering in our devices. Our results show that Si3N4 is an attractive alternative to thermally grown SiO2 substrate for TMD FETs. (C) 2015 AIP Publishing LLC.STTR programNSF NASCENT ERCArmy Research Office under STTR W911NF-14-P-0030Microelectronics Research Cente

Second year medical students’ feedback on teaching-learning methodologies and evaluation methods in Pharmacology: a questionnaire based study

Background: Pharmacology enables medical students with the art of rational prescriptions of drugs. It is one of the rapidly evolving subjects in medical sciences. The purpose of the study was to assess whether teaching-learning methodologies and evaluation methods are supporting the curriculum goals and what modifications can be made for the benefit of medical students.Methods: After approval by the Institutional Ethics Committee the study was carried out in January-February 2017. A total of 128 students of 2nd MBBS were administered a pre-validated questionnaire after explaining the purpose of the study. Descriptive statistics were used for analysis of data. Frequency was expressed as percentage.Results: A total response rate of 93.75% was observed. Most of the students mentioned cardiovascular system (20.8%) as the most interesting topic. 78.3% preferred teaching by use of combination of both audio-visual aids and chalk and board. Majority of the students rated practical classes as similar to theory (34.2%). 91.7% students mentioned that seminars are useful to them. 95% of students are interested in continuation of the integrated classes conducted at the end of each chapter. 98.3% of students for written tests and 90% for viva voce responded positively for the need of such periodic evaluation in addition to university prescribed evaluations. 95% students mentioned that field visits helps them in better understanding of pharmacology.Conclusions: The present study helped us to elicit student preferences regarding teaching and evaluation methods in pharmacology. Implementation of the same would be helpful for better outcome of students

Formulation, evaluation and optimization of fast dissolving tablets containing Amlodipine Besylate by sublimation method

The objective of this research was to formulate fast dissolving tablet of amlodipine besylate for rapid action. Sublimation method was adapted to prepare the tablets by using a 23 full factorial design. FT-IR and D.T.A studies revealed that there was no physico-chemical interaction between amlodipine besylate and other excipients. All formulations are evaluated for pre-compression and post-compression parameters, wetting time, water absorption ratio. The results obtained showed that the quantity of starch potato, sodium starch glycolate, camphor significantly affect response variables. The results indicate that the optimized tablet formulation provides a short DT of 8 sec with sufficient crushing strength and acceptable friability. Stability studies of optimized formulation revealed that formulation is stable

Bacillus cereus KLUVAA Mediated Biocement Production Using Hard Water and Urea

In the present study, a potential bacterial strain with maximum urease activity was isolated from urea-rich paddy field soil for biocement production. The bacterial isolate was screened using Christensen selective agar media and named as KLUVAA. This isolate was found to be tolerant up to 10 % urea. 16S rRNA sequencing analysis identified the isolate KLUVAA as Bacillus cereus. Biocement production was carried out using tap water with 431.7 mg L–1 of hardness as a natural source of calcium. Functional groups present in biocement were analysed using FT-IR spectrum. The morphology and elemental composition of the biocement was studied using SEM with EDS mapping and XRD analyses. Thermogravimetric analysis was used to study the thermal stability of the microbial biocement. Further, process parameters were optimized for enhancing the yield of biocement. This work is licensed under a Creative Commons Attribution 4.0 International License