Browsing by Author "Ki-Hyun Kim"

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Antibiotic resistance in major rivers in the world: A systematic review on occurrence, emergence, and management strategies
(Elsevier Ltd, 2019) Rachna Singh; Akhand Pratap Singh; Sunil Kumar; Balendu Shekher Giri; Ki-Hyun Kim
The occurrence of antibiotics and antibiotic resistance genes in riverine systems has become a growing concern worldwide. Risk prediction of antibiotic resistance is difficult as the continuous addition of new antibiotics complicate the antibiotic resistome. As rivers flow with heavy antibiotic burdens, antibiotic resistance develops rapidly and disseminates into various environmental compartments. The analysis of antibiotic contamination-driven resistance in global rivers provides a clear picture of the consequences in the near future. In this review, an extensive literature survey along with the analysis on the relevant data was carried out to offer a better knowledge on the global trend of antibiotic resistance. Although the most common resistance was reported against tetracycline and sulfonamide class of antibiotics, the trend of resistance against advanced generation antibiotics such as β-lactam is alarming. Furthermore, non-therapeutic use of antibiotics as growth promoters has become more frequent than clinical use as a major driver of resistance dissemination. Mechanistically, integrons and mobile genetic elements are suggested as one of the important media for resistance gene transfer. Considering the significance of this emerging issue, special emphasis is placed on the sources, fate, and possible management strategies to mitigate the threat of antibiotic resistance. This review covers the environmental footprints of the antibiotic contamination-mediated emergence and dissemination of antibiotic resistant bacteria and genes in global rivers. As such, the distribution pattern of antibiotic contamination and resistance determinants in various rivers worldwide has been described with a note of its long term impact. The information presented in this review may be useful to policy makers, clinicians, and pharmaceutical companies to tackle the epidemiology of antibiotic resistance as a global threat. © 2019 Elsevier Ltd
Porous Coordination Polymers
(Elsevier, 2024) Nidhi Goel; Ki-Hyun Kim
Porous Coordination Polymers: From Fundamentals to Advanced Applications offers a comprehensive coverage the latest advances in porous coordination polymers for cutting-edge applications. Porous Coordination Polymers are gaining increasing interest due to their attractive properties, such as structural flexibility, large surface area, tailorable pore size, and functional tunability, in turn enabling a wide range of possible applications which this book aims to highlight and to elucidate. The book begins by introducing porous coordination polymers, highlighting their structure, chemistry, basic properties, and design approaches. This is followed by a chapter focusing on synthetic methods and mechanical properties. Subsequent chapters provide in-depth coverage of specific target applications, explaining the preparation of porous coordination polymers for areas including catalysis and photocatalysis, environmental remediation, gas storage and separation, energy storage and conversion, new generation magnets, nanocarriers in therapeutics, and biomedical imaging. Finally, current challenges and future developments are considered in detail. © 2024 Elsevier Inc. All rights reserved including those for text and data mining AI training and similar technologies.
Removal and accumulation of mercury by aquatic macrophytes from an open cast coal mine effluent
(2009) Virendra Kumar Mishra; B.D. Tripathi; Ki-Hyun Kim
In this study, the mercury (Hg) removal capacities of two aquatic macrophytes, Pistia stratiotes and Azolla pinnata, were investigated against the coal mining effluent. These plants reduced mercury from the effluent via rhizofiltration and subsequent accumulation in plant. The removal rate of P. stratiotes and A. pinnata was 80% and 68%, respectively, after 21 days of exposure to the effluent containing 10 μg L-1 of Hg. As mercury from the effluent was accumulated in the root and shoot tissues of both aquatic macrophytes, they were proven to be a root accumulator with a translocation factor of less than one during the entire study. The decreasing Hg content in effluent (from 10 to 2.0 μg L-1) was reflected by its accumulation in roots (0.57 ± 0.02 mg g-1 in P. stratiotes) and leaves of the experimental plants (0.42 ± 0.01 mg g-1, P. stratiotes). As a result, Hg concentrations in the coal mining effluent were tightly associated with those observed from macrophytes. Considering the high removal efficiencies of Hg by these aquatic macrophytes, these plants can be recommended for the actual treatment of Hg-containing waste waters. © 2009 Elsevier B.V. All rights reserved.