Evaluation of in vitro antioxidant activities of the methanol extracts of Glinus oppositifolius and Trianthema decandra

Upal Kanti Mazumder,Malaya Gupta,Chandi Charan Kandar,Pallab Kanti Haldar 경희대학교 융합한의과학연구소 2007 Oriental Pharmacy and Experimental Medicine Vol.7 No.3

Glinus oppositifolius and Trianthema decandra belonging to the Ficoidaceae family were commonly used by tribal peoples for the treatment of liver disorders and cancer. The preliminary phytochemical screening of those plants showed the presence of flavonoids, terpenoids, tannins and saponins. The aim of this study was to evaluate the in vitro antioxidant activities of the methanol extracts of Glinus oppositifolius (MEGO) and Trianthema decandra (METD). The antioxidative capacities of MEGO and METD were determined by the following four complementary assay; DPPH radical scavenging assay, superoxide anion generation by xanthine-xanthine Oxidase assay, hydroxyl radical scavenging assay and Fe2+–ascorbate induced by lipid peroxidation assay. The IC50 values of the both extracts were calculated from the inhibition curve. The IC50 MEGO and METD in DPPH, superoxide anion, hydroxyl radical scavenging and lipid peroxidation assay are 1.85, 7.31, 13.95, 22.82 and 2.21, 9.78, 14.87, 19.76 µg/ml respectively. Both the extracts exhibited a significant antioxidant effects.

Evaluation of in vitro antioxidant activities of the methanol extracts of Glinus oppositifolius and Trianthema decandra

Mazumder, Upal Kanti,Gupta, Malaya,Haldar, Pallab Kanti,Kandar, Chandi Charan Kyung Hee Oriental Medicine Research Center 2007 Oriental pharmacy and experimental medicine Vol.7 No.3

Glinus oppositifolius and Trianthema decandra belonging to the Ficoidaceae family were commonly used by tribal peoples for the treatment of liver disorders and cancer. The preliminary phytochemical screening of those plants showed the presence of flavonoids, terpenoids, tannins and saponins. The aim of this study was to evaluate the in vitro antioxidant activities of the methanol extracts of Glinus oppositifolius (MEGO) and Trianthema decandra (METD). The antioxidative capacities of MEGO and METD were determined by the following four complementary assay; DPPH radical scavenging assay, superoxide anion generation by xanthine-xanthine Oxidase assay, hydroxyl radical scavenging assay and $Fe^{2+}$-ascorbate induced by lipid peroxidation assay. The $IC_{50}$ values of the both extracts were calculated from the inhibition curve. The $IC_{50}$ MEGO and METD in DPPH, superoxide anion, hydroxyl radical scavenging and lipid peroxidation assay are 1.85, 7.31, 13.95, 22.82 and 2.21, 9.78, 14.87, 19.76 ${\mu}g/ml$ respectively. Both the extracts exhibited a significant antioxidant effects.

Relative basicity approach for separation of a-toluic acid with triglycerides of fatty acids by reactive extraction

Kanti Kumar Athankar,Kailas L Wasewar,Mahesh N. Varma,Diwakar Z. Shende 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.22 No.-

Extraction of a-toluic acid from aqueous solution has drawn attention due to its ample range ofbiological, antibacterial, analgesic, and virucidal properties. In the present paper, reactive separation ofa-toluic acid with tri-n-butyl phosphate dissolved in triglycerides of fatty acids such as castor oil,soybean oil and sunflower oil has been investigated to evaluate the performance of the diluents andextractants in reactive extraction process. The experimental results were presented as overalldistribution coefficient (KD), loading factor (f), extraction efficiency (E%), and overall equilibriumconstant (Eab) and observed in the range of data 4.4–45.7, 0.006–0.066, 81.6–97.9, and 15.1–28.1,respectively. Further relative basicity approach has been extended to represent the experimental results. The model is best suited to experimental results. The use of triglycerides of fatty acids (natural diluents)such as castor oil, soybean oil and sunflower oil can reduce the toxicity up to certain levels. Hence, allthree diluents can be used to avoid the toxicity effect.

Role of red grape polyphenols as antidiabetic agents

Kanti Bhooshan Pandey,Syed Ibrahim Rizvi 한국한의학연구원 2014 Integrative Medicine Research Vol.3 No.3

The worldwide incidence of diabetes mellitus has reached alarming proportions. Persistent hyperglycemia due to impaired insulin activity and/or insulin resistance inversely affects the retina, cerebrovascular system, kidney, peripheral limbs, and other parts of the body, which leads to life-threatening complications. The causal role of oxidative stress in the development and progression of diabetic complications has been emphasized. Polyphenols present in natural products have gained much attention in recent decades in preventive studies against diabetes-associated pathologies. In the present review, we provide a comparative update on the role of quercetin, myricetin, and resveratrol—the major polyphenols present in red grapes—in intervening with diabetic complications, and a brief highlight on the molecular mechanisms underlying oxidative stress mediated hyperglycemia.

Cyber Threat Intelligence Traffic Through Black Widow Optimisation by Applying RNN-BiLSTM Recognition Model

Kanti Singh Sangher,Archana Singh,Hari Mohan Pandey International Journal of Computer ScienceNetwork S 2023 International journal of computer science and netw Vol.23 No.11

The darknet is frequently referred to as the hub of illicit online activity. In order to keep track of real-time applications and activities taking place on Darknet, traffic on that network must be analysed. It is without a doubt important to recognise network traffic tied to an unused Internet address in order to spot and investigate malicious online activity. Any observed network traffic is the result of mis-configuration from faked source addresses and another methods that monitor the unused space address because there are no genuine devices or hosts in an unused address block. Digital systems can now detect and identify darknet activity on their own thanks to recent advances in artificial intelligence. In this paper, offer a generalised method for deep learning-based detection and classification of darknet traffic. Furthermore, analyse a cutting-edge complicated dataset that contains a lot of information about darknet traffic. Next, examine various feature selection strategies to choose a best attribute for detecting and classifying darknet traffic. For the purpose of identifying threats using network properties acquired from darknet traffic, devised a hybrid deep learning (DL) approach that combines Recurrent Neural Network (RNN) and Bidirectional LSTM (BiLSTM). This probing technique can tell malicious traffic from legitimate traffic. The results show that the suggested strategy works better than the existing ways by producing the highest level of accuracy for categorising darknet traffic using the Black widow optimization algorithm as a feature selection approach and RNN-BiLSTM as a recognition model.

Geospatial analysis for the assessment of mine land reclamation area: a case study of Noamundi Block, Jharkhand

Kunal Kanti Maiti,Jatisankar Bandyopadhyay,Debashish Chakravarty,Subha Das,Sonjay Mondal 대한공간정보학회 2019 Spatial Information Research Vol.27 No.6

Reclamation consists of modifying the disturbed land and returning it to a more natural state of hills, grasslands, forests and lakes for the benefit of future generations. This study analyzed the change of land use and land cover in the Noamundi block (West Singhbhum district, Jharkhand), India. This paper demonstrates the impact of mining on the natural environment in this area by using three images of the Landsat missions from 2003, 2011 and 2017 which were processed by the supervised image classification (8 classes). By comparing the classified images this paper retrieve the absolute and relative change of land use and land cover in the study area. An accuracy assessment is performed to describe the quality of the classification. The maximum increase of agricultural areas is detected with a decrease in forest areas.

A Comprehensive Study on Fuel Injector Test Bench for Heavy Duty Engine

( Shubhra Kanti Das ),( Sakda Thongchai ),임옥택 ( Ocktaeck Lim ) 한국액체미립화학회 2015 한국액체미립화학회지 Vol.20 No.3

This study discusses a fuel injector test bench containing a mechanical type fuel supply system for heavy duty diesel engine. The main focus of this study was to evaluate the design stability of the test bench, which basically measures the injector durability of a multi-hole heavy duty injector by using pure diesel as a test fuel. In this experiment, diesel spray was controlled by a specially designed control box and all the experiments were carried out to measure e.g. fuel injection pressure and fuel injection quantity to understand the injection status which is interlinked with the stability factor of total test bench design. Also, the durability test was performed to understand the heavy duty operation lastingness of the designed system and the flow rate of the installed distributor pump in the fuel supply system of this studying test bench was compared with LO-1 and LO-2 pump. The results of the above mention tests revealed that the injector test bench design and control system can serve the purpose for heavy duty injector.

Excess dopant effect in platinum-based alloys toward the oxygen electroreduction reaction

Mrinal Kanti Kabiraz,Hee Jin Kim,Youngmin Hong,Qiaowan Chang,Sang-Il Choi 대한화학회 2022 Bulletin of the Korean Chemical Society Vol.43 No.9

Doping the PtNi octahedra with trace amount of transition metals has recently been shown to significantly improve the activity and durability of the oxygen reduction reaction (ORR). However, the role of excessive amounts of doped elements on ORR performance is unclear. In this work, PtNi octahedra were synthesized with and without excess Mo dopant. Also, spherical PtNi nanoparticles containing excess Co dopant were synthesized. The ORR performance revealed that PtNiMo octahedra and PtNiCo nanoparticles showed inferior ORR activities compared to bimetallic PtNi octahedra. Based on the electrochemical analysis, we found that unfavorable oxygen-binding strengths of PtNiMo and PtNiCo catalysts decrease the ORR performances.

An ultralight porous alumina ceramic in the image of jute stem

Pijush Kanti Mandal,Kalyan Kumar Mukherjee,Omprakash Chakrabarti,Himadri Sekhar Maiti,Rabindranath Majumdar 한양대학교 세라믹연구소 2009 Journal of Ceramic Processing Research Vol.10 No.4

A carbonaceous preform (C-preform) was prepared by thermal and microwave (MW) processing of short lengths (0.02- 0.06 m) of dry stems of jute (Corchorus capsularis L). Infiltration of an Al2O3-sol into the C-preforms and a subsequent oxidising heat treatment (1273-1723 K) resulted in the formation of an ultralight monophasic Al2O3 ceramic (bulk density ~200 kg·m−3) with perfect replication of the pore structure of the starting C-preforms derived from the jute stems (JS). The cellular porous alumina ceramics derived from JS having special morphologies with a long, large and oriented growth of alpha alumina grains are likely to be suitable for devices such as high temperature insulators, catalyst supports, permeators for gas phase reactions at elevated temperatures, and biomaterials such as for controlled drug release devices. A carbonaceous preform (C-preform) was prepared by thermal and microwave (MW) processing of short lengths (0.02- 0.06 m) of dry stems of jute (Corchorus capsularis L). Infiltration of an Al2O3-sol into the C-preforms and a subsequent oxidising heat treatment (1273-1723 K) resulted in the formation of an ultralight monophasic Al2O3 ceramic (bulk density ~200 kg·m−3) with perfect replication of the pore structure of the starting C-preforms derived from the jute stems (JS). The cellular porous alumina ceramics derived from JS having special morphologies with a long, large and oriented growth of alpha alumina grains are likely to be suitable for devices such as high temperature insulators, catalyst supports, permeators for gas phase reactions at elevated temperatures, and biomaterials such as for controlled drug release devices.

SPRAY AND COMBUSTION CHARACTEISTICS OF GASOLINE-BIODIESEL BLENDED FUEL IN A CONSTANT VOLUME COMBUSTION CHAMBER

( Shubhra Kanti Das ),( Kim Hyojin ),( Ocktaeck Lim ) 한국액체미립화학회 2017 한국액체미립화학회 학술강연회 논문집 Vol.2017 No.-

Experiments were performed to determine the spray and ignition characteristics of gasoline-biodiesel blended fuel using a constant volume combustion chamber (CVCC). The main objective of this study is to reveal the effects of biodiesel addition to gasoline under 5%, 10%, 20% and 40% by volume and their applicability in the future compression ignition. Non-vaporizing spray and combustion characteristics were investigated under varying injection pressure (40-120 MPa) and ambient gas density (10-20 kg/㎥) conditions using neat gasoline and gasoline biodiesel fuel blends. The results of the experiments were combined to identify spray and ignition characteristics of each fuel under same operating condition. Non-vaporizing spray characteristics results (e.g. spray penetration, spray cone angle, spray area) provides a quantitative profile of the spray structure. On the other hand, spray combustion characteristics were determined (e.g. rate of heat release, ignition delay) under different oxygen concentration ranging from 10% to 21%. From non-vaporizing spray characteristics, it can conclude that the increase in ambient gas density decreases the vapor penetration, spray area but increases the spray angle. From the spray combustion result, it is obvious that higher biodiesel fraction leads the shorter auto-ignition delay which reduces the requirement of intake temperature.