scispace - formally typeset
Search or ask a question
Institution

Cochin University of Science and Technology

EducationKochi, Kerala, India
About: Cochin University of Science and Technology is a education organization based out in Kochi, Kerala, India. It is known for research contribution in the topics: Thin film & Natural rubber. The organization has 5382 authors who have published 7690 publications receiving 103827 citations. The organization is also known as: CUSAT & Cochin University.


Papers
More filters
Journal ArticleDOI
TL;DR: A bisazomethine Schiff base was synthesized by condensation of 3-hydroxyquinoxaline-2-carboxaldehyde and 2,3-diaminomaleonitrile as mentioned in this paper.

34 citations

Journal ArticleDOI
TL;DR: The HDPE-ZrSiO4 composites show good dielectric, thermal and mechanical properties suitable for microwave soft substrate applications and the antenna parameters are investigated.
Abstract: A low cost and low dielectric loss zirconium silicate (ZrSiO4) reinforced HDPE (high-density polyethylene) composite has been developed for antenna applications. The 0–3 type composite is prepared by dispersing ZrSiO4 fillers for various volume fractions (0.1 to 0.5) in the HDPE matrix by the melt mixing process. The composite shows good microwave dielectric properties with a relative permittivity of 5.6 and a dielectric loss of 0.003 at 5 GHz at the maximum filler loading of 0.5 volume fraction. The composite exhibits low water absorption, excellent thermal and mechanical properties. It shows a water absorption of 0.03 wt%, a coefficient of thermal expansion of 70 ppm per °C and a room temperature thermal conductivity of 2.4 W mK−1. The composite shows a tensile strength of 22 MPa and a microhardness of 13.9 kg mm−2 for the filler loading of 0.5 volume fraction. The HDPE–ZrSiO4 composites show good dielectric, thermal and mechanical properties suitable for microwave soft substrate applications. A microstrip patch antenna is designed and fabricated using the HDPE–0.5 volume fraction ZrSiO4 substrate and the antenna parameters are investigated.

34 citations

Journal ArticleDOI
TL;DR: A case of bacteraemia caused by Weissella confusa is described in a 48-year-old male who was operated on for adenocarcinoma of the gastro-oesophageal junction and maintained on total parenteral nutrition.
Abstract: We describe a case of bacteraemia caused by Weissella confusa in a 48-year-old male who was operated on for adenocarcinoma of the gastro-oesophageal junction and maintained on total parenteral nutrition. Blood cultures were positive for a vancomycin-resistant streptococcus-like organism which was identified as W. confusa by 16S rRNA gene sequencing.

34 citations

Journal ArticleDOI
TL;DR: Results indicated scope for utilization of this acidophilic tannase for transesterification of tannic acid into propyl gallate, tea cream solubilisation and simultaneous production of gallic acid along with tann enzyme under submerged fermentation by this fungus.
Abstract: Marine Aspergillus awamori BTMFW032, recently reported by us, produce acidophilic tannase as extracellular enzyme. Here, we report the application of this enzyme for synthesis of propyl gallate by direct transesterification of tannic acid and in tea cream solubilisation besides the simultaneous production of gallic acid along with tannase under submerged fermentation by this fungus. This acidophilic tannase enabled synthesis of propyl gallate by direct transesterification of tannic acid using propanol as organic reaction media under low water conditions. The identity of the product was confirmed with thin layer chromatography and Fourier transform infrared spectroscopy. It was noted that 699 U/ml of enzyme could give 60% solubilisation of tea cream within 1 h. Enzyme production medium was optimized adopting Box–Behnken design for simultaneous synthesis of tannase and gallic acid. Process variables including tannic acid, sodium chloride, ferrous sulphate, dipotassium hydrogen phosphate, incubation period and agitation were recognized as the critical factors that influenced tannase and gallic acid production. The model obtained predicted 4,824.61 U/ml of tannase and 136.206 μg/ml gallic acid after 48 h of incubation, whereas optimized medium supported 5,085 U/ml tannase and 372.6 μg/ml of gallic acid production after 36 and 84 h of incubation, respectively, with a 15-fold increase in both enzyme and gallic acid production. Results indicated scope for utilization of this acidophilic tannase for transesterification of tannic acid into propyl gallate, tea cream solubilisation and simultaneous production of gallic acid along with tannase.

34 citations

Journal ArticleDOI
31 Jul 2020-PeerJ
TL;DR: Reduction in PM10 during lockdown and triple-lockdown days enhanced the intensity of solar radiation reaching the lower troposphere, and increased air temperature and reduced the relative humidity, and surface O3 production over Kannur was found to have increased during triple-locksdown days, and the air quality index revealed that theAir quality at the observational site was clean during the lockdown.
Abstract: The novel SARS-CoV-2 coronavirus that emerged in the city of Wuhan, China, last year has since become the COVID-19 pandemic across all continents. To restrict the spread of the virus pandemic, the Government of India imposed a lockdown from 25 March 2020. In India, Kannur district was identified as the first "hotspot" of virus transmission and a "triple-lockdown" was implemented for a span of twenty days from 20 April 2020. This article highlights the variations of surface O3, NO, NO2, CO, SO2, NH3, VOC's, PM10, PM2.5 and meteorological parameters at the time of pre-lockdown, lockdown and triple-lockdown days at Kannur town in south India using ground-based analyzers. From pre-lockdown days to triple-lockdown days, surface O3 concentration was found to increase by 22% in this VOC limited environment. NO and NO2 concentrations were decreased by 61% and 71% respectively. The concentration of PM10 and PM2.5 were observed to decline significantly by 61% and 53% respectively. Reduction in PM10 during lockdown and triple-lockdown days enhanced the intensity of solar radiation reaching the lower troposphere, and increased air temperature and reduced the relative humidity. Owing to this, surface O3 production over Kannur was found to have increased during triple-lockdown days. The concentration of CO (67%), VOCs (61%), SO2 (62%) and NH3 (16%) were found to decrease significantly from pre-lockdown days to triple-lockdown days. The air quality index revealed that the air quality at the observational site was clean during the lockdown.

34 citations


Authors

Showing all 5433 results

NameH-indexPapersCitations
Pulickel M. Ajayan1761223136241
Maxime Dougados134105469979
Sabu Thomas102155451366
Philippe Ravaud10161841409
David P. Salmon9941943935
Jérôme Bertherat8543824794
Luc Mouthon8456426238
Xavier Bertagna7428518738
Alfred Mahr7322922581
Nicolas Roche7262922845
Charles Chapron7137818048
Benoit Terris6123413353
François Goffinet6053214433
Xavier Puéchal6031613240
Pascal Laugier5848210518
Network Information
Related Institutions (5)
Indian Institute of Technology Kharagpur
38.6K papers, 714.5K citations

90% related

Indian Institutes of Technology
40.1K papers, 652.9K citations

90% related

Banaras Hindu University
23.9K papers, 464.6K citations

89% related

University of Delhi
36.4K papers, 666.9K citations

89% related

Panjab University, Chandigarh
18.7K papers, 461K citations

89% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202318
2022106
2021753
2020613
2019503
2018439