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Kamath Mukund Manali,Rex Arunraj,Gautham Subramaniam Ramakrishnan,Mohandass Ramya 한국식품과학회 2019 Food Science and Biotechnology Vol.28 No.2
Spirulina has emerged as the next-generationdietary supplement owing to its health benefits. Despite theadvantages, there have been reports of contamination bycyanotoxins such as microcystins that can adversely affecthuman health. Hence, there is a need to develop a robust,efficient, and cost-effective method to detect microcystinproducingcyanobacteria in these food supplements. In thisstudy, we have demonstrated a multiplex polymerase chainreaction (PCR) method for identification of microcystincontaminationin spirulina dietary supplements. Thismethod involves simultaneous amplification of phycocyaninand microcystin B encoding genes (pcb, mcyB). Thesensitivity of the multiplex PCR was assessed, and the limitof detecting mcyB along with pcb was found to be 250 fg/lL. The presence of microcystin was detected in five out ofseven fish food supplements indicating poor culture conditions. Hence, rigorous quality control is required formonitoring the spirulina food supplements.
Kamath, Amrita V.,Morrison, Richard A.,Mathias, Neil R.,Dando, Sandra A.,Marino, Anthony M.,Chong, Sae-Ho 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.8
Permeability estimates using Caco-2 cells do not accurately predict the absorption of hydrophilic drugs that are primarily absorbed via the paracellular pathway. The objective of this study was to investigate whether modulation of tight junctions would help differentiation of paracellularly absorbed compounds. Tight junctions in Caco-2 cell monolayers were manipulated using calcium depletion approaches to decrease the transepithelial electrical resistance (TEER) of the monolayers, and permeability of hydrophilic compounds were measured under these conditions. Permeability of these compounds were also measured in Calu-3 cells, which have tighter junctions than Caco-2 cells. Calcium depletion loosened the tight junctions of Caco-2 cells to varying levels as measured by the decrease in TEER values of the monolayers. While the absolute permeability of all the model compounds increased as the tight junctions were loosened, the ratios of their permeability relative to mannitol permeability were similar. The permeability of these compounds in the tighter Calu-3 cells were also found to be similar to each other. Altering the tight junctions of Caco-2 cells to obtain leakier cell monolayers, or using a cell line with tighter junctions like Calu-3 cells, did not improve differentiation between well absorbed and poorly absorbed hydrophilic drugs. Mere manipulation of the tight junctions to increase or decrease transepithelial electrical resistance does not appear to be a viable approach to predict human absorption for hydrophilic compounds that are primarily absorbed via the paracellular pathway.
Blockchain for Women Next Generation for Sustainable Development Goal 5
Reshma Kamath 연세대학교 빈곤문제국제개발연구원 2018 Asian Development Perspectives (ADP) Vol.9 No.1
Blockchain For Women highlights the potential of Blockchain, a nascent technology, in revamping the role of Women, Children and Gender minorities through Identity, Ownership, and Access. It discusses the gender digital divide impacting SDG 5 and how Blockchain is overcoming this problem to meet the Goals. While applying Blockchain as a technology and its beneficial attributes applicable to SDG 5, the paper engages with how Blockchain is being piloted and tested by the United Nations, civil society, corporations and startups alike in various sectors impacting women. The paper bridges the gap between the theoretical potential of Blockchain to showing actualized, on-the-ground applications of Blockchain technology in meeting SDG 5 Goals.
A Simple Real-Time DMPPT Algorithm for PV Systems Operating under Mismatch Conditions
Aniruddha Kamath M.,Jayanta Biswas,Anjana K. G.,Mukti Barai 전력전자학회 2018 JOURNAL OF POWER ELECTRONICS Vol.18 No.3
This paper presents a distributed maximum power point tracking (DMPPT) algorithm based on the reference voltage perturbation (RVP) method for the PV modules of a series PV string. The proposed RVP-DMPPT algorithm is developed to accurately track the maximum power point (MPP) for each PV module operating under all atmospheric conditions with a reduced hardware overhead. To study the influence of parameters such as the controller reference voltage (Vref) and PV current (Ipv) on the PV string voltage, a small signal model of a unidirectional differential power processing (DPP) based PV-Bus architecture is developed. The steady state and dynamic performances of the proposed RVP DMPPT algorithm and small signal model of the unidirectional DPP based PV-Bus architecture are demonstrated with simulations and experimental results. The accuracy of the RVP DMPPT algorithm is demonstrated by obtaining a tracking efficiency of 99.4% from the experiment.
Blockchain for Women Next Generation for Sustainable Development Goal 5
Reshma Kamath 연세대학교 빈곤문제국제개발연구원 2018 Journal of Poverty Alleviation and International D Vol.9 No.1
Blockchain For Women highlights the potential of Blockchain, a nascent technology, in revamping the role of Women, Children and Gender minorities through Identity, Ownership, and Access. It discusses the gender digital divide impacting SDG 5 and how Blockchain is overcoming this problem to meet the Goals. While applying Blockchain as a technology and its beneficial attributes applicable to SDG 5, the paper engages with how Blockchain is being piloted and tested by the United Nations, civil society, corporations and startups alike in various sectors impacting women. The paper bridges the gap between the theoretical potential of Blockchain to showing actualized, on-the-ground applications of Blockchain technology in meeting SDG 5 Goals.
Crypto-governance Blockchain Governance for Sustainable Development Goals 16 and 17
Reshma Kamath 연세대학교 빈곤문제국제개발연구원 2018 Asian Development Perspectives (ADP) Vol.9 No.2
Cryptogovernance, governance on the blockchain, has real, long-lasting potential to impact the United Nations Sustainable Development Goals 16 and 17. The idea of Cryptogovernance embeds consensus protocols, rights-based mechanisms and a convergence ecosystem. Through institutional reform via proof of attestation and proof of corruption, blockchain protocols are transforming interactions between people and systems. Several blockchain projects, though nascent and evolving, have instituted such reform (voting, asset tracking, tokenization, ecosystem building), yet development and public sector is lagging behind. This paper helps connect the dots between technology and governance, via a cryptogovernance framework.
THE DEPENDENCE OF MARKET RETURN VOLATILITY ON TRADING VOLUME IN KOREA AND THAILAND
Ravindra Kamath,Jirayuth Chusanachoti People&Global Business Association 2000 Global Business and Finance Review Vol.5 No.1
The objective of this paper is to examine if the heteroskedasticity in stock market return data can be explained by incorporating trading volume as a mixing variable in the conditional variance equation. This study relies on daily returns and volumes of two developing markets in Asia, namely, the Korean Stock Exchange and the Stock Exchange of Thailand over the 9-year tumultuous period of 1990-1998. The results strongly suggest that the GARCH model adequately describes the two index return series in the absence of volume as a mixing variable. However, the introduction of volume does not succeed in eliminating or for that matter significantly reducing the ARCH and GARCH effects.
Binary logistic regression analysis of hard palate dimensions for sexing human crania
Venkatesh Kamath,Muhammed Asif,Radhakrishna Shetty,Ramakrishna Avadhani 대한해부학회 2016 Anatomy & Cell Biology Vol.49 No.2
Sex determination is the preliminary step in every forensic investigation and the hard palate assumes significance in cranial sexing in cases involving burns and explosions due to its resistant nature and secluded location. This study analyzes the sexing potential of incisive foramen to posterior nasal spine length, palatine process of maxilla length, horizontal plate of palatine bone length and transverse length between the greater palatine foramina. The study deviates from the conventional method of measuring the maxillo-alveolar length and breadth as the dimensions considered in this study are more heat resistant and useful in situations with damaged alveolar margins. The study involves 50 male and 50 female adult dry skulls of Indian ethnic group. The dimensions measured were statistically analyzed using Student’s t test, binary logistic regression and receiver operating characteristic curve. It was observed that the incisive foramen to posterior nasal spine length is a definite sex marker with sex predictability of 87.2%. The palatine process of maxilla length with 66.8% sex predictability and the horizontal plate of palatine bone length with 71.9% sex predictability cannot be relied upon as definite sex markers. The transverse length between the greater palatine foramina is statistically insignificant in sexing crania (P=0.318). Considering a significant overlap of values in both the sexes the palatal dimensions singularly cannot be relied upon for sexing. Nevertheless, considering the high sex predictability of incisive foramen to posterior nasal spine length this dimension can definitely be used to supplement other sexing evidence available to precisely conclude the cranial sex.