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Current advancements of magnetic nanoparticles in adsorption and degradation of organic pollutants
Ul-Islam, M.,Ullah, M. W.,Khan, S.,Manan, S.,Khattak, W. A.,Ahmad, W.,Shah, N.,Park, J. K. Springer Science + Business Media 2017 Environmental Science and Pollution Research Vol.24 No.14
<P>Nanotechnology is a fast-emerging field and has received applications in almost every field of life. Exploration of new synthetic technologies for size and shape control of nanomaterials is getting immense consideration owing to their exceptional properties and applications. Magnetic nanoparticles (MNPs) are among the most important group of nanoparticles thanks to their diverse applications in medical, electronic, environmental, and industrial sectors. There have been numerous synthetic routes of MNPs including thermal decomposition, co-precipitation, microemulsion, microwave assisted, chemical vapor deposition, combustion synthesis, and laser pyrolysis synthesis. The synthesized MNPs have been successfully applied in medical fields for therapy, bioimaging, drug delivery, and so on. Among environmental aspects, there has been great intimidation of organic pollutants in air and water. Utilization of various wastes as adsorbents has removed 80 to 99.9% of pollutants from contaminated water. MNPs as adsorbents compared to coarse-grained counterparts have seven times higher capacity in removing water pollutants and degrading organic contaminants. This study is focused to introduce and compile various routes of MNP synthesis together with their significant role in water purifications and degradation of organic compounds. The review has compiled recent investigation, and we hope it will find the interest of researchers dealing with nanoparticles and environmental research.</P>
Shah, D.H.,Seol, J.-W.,Park, S.-Y.,Ryu, K.-S.,Kwon, J.-T.,Cho, M.-R.,Park, J.-H.,Kang, C.-S.,Kang, H.-S.,Chae, J.-S. Elsevier 2005 The Journal of applied poultry research Vol.14 No.3
<P><B>Abstract</B></P> <P>Fowl typhoid (FT), caused by <I>Salmonella gallinarum</I> (SG), is responsible for heavy economic losses through morbidity, mortality, and reduced egg production to the poultry industry worldwide. The use of alternative medications to control FT is important in light of emergence of multiple drug-resistant strains of SG and the public's desire to have organically grown poultry. We report the efficient utilization of tissue culture medium waste after harvest of Korean wild ginseng (TCM-KWG) <I>(Panax ginseng)</I> as an alternative medicine in the control of FT. In a series of experiments performed in this study, we found that oral administration of TCM-KWG through drinking water significantly reduced the mortality, organ invasiveness, and fecal shedding of SG in 1-d-old chickens experimentally infected with virulent SG. The results were positively correlated with higher dose and longer duration of pretreatment with TCM-KWG in relation to reduction in mortality caused by FT. The results of this work indicate that the TCM-KWG may be used as a cost-effective and environmentally friendly alternative medicine to control and minimize the losses due to FT in chickens.</P>
Energy harvesting and information processing in two-way multiplicative relay networks
Shah, S.T.,Choi, K.W.,Hasan, S.F.,Chung, M.Y. IET 2016 Electronics letters Vol.52 No.9
<P>An energy harvesting (EH) and information processing network based on two-way multiplicative relay is proposed. In the proposed scheme, two nodes communicate with each other via an energy constrained multiplicative relay node. The relay node uses power splitting-based relaying protocol for EH and information processing. The numerical results show that the proposed scheme outperforms the legacy amplify-and-forward EH relaying technique.</P>
Nonlinear kinetic Alfvén waves with non-Maxwellian electron population in space plasmas
Masood, W.,Qureshi, M. N. S.,Yoon, P. H.,Shah, H. A. American Geophysical Union 2015 JOURNAL OF GEOPHYSICAL RESEARCH. SPACE PHYSICS Vol.120 No.1
<P>The present work discusses the effects of non-Maxwellian electron distributions on kinetic Alfven waves in low-beta plasmas. Making use of the two-potential theory and employing the Sagdeev potential approach, the existence of solitary kinetic Alfven waves having arbitrary amplitude is investigated. It is found that the use of non-Maxwellian population of electrons in the study of kinetic Alfven waves leads to solutions corresponding to solitary structures that do not exist for Maxwellian electrons. The present investigation solves the riddle of plasma density fluctuations associated with strong electromagnetic perturbations observed by the Freja satellite. The present findings can also be applied to regions of space where various satellite missions have observed the presence of suprathermal populations of plasma species and where the low assumption is valid</P>
Strategies for cost-effective and enhanced production of bacterial cellulose
Islam, M.U.,Ullah, M.W.,Khan, S.,Shah, N.,Park, J.K. Elsevier 2017 INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES Vol.102 No.-
Bacterial cellulose (BC) has received substantial attention because of its high purity, mechanical strength, crystallinity, liquid-absorbing capabilities, biocompatibility, and biodegradability etc. These properties allow BC to be used in various fields, especially in industries producing medical, electronic, and food products etc. A major discrepancy associated with BC is its high production cost, usually much higher than the plant cellulose. To address this limitations, researchers have developed several strategies for enhanced production of BC including the designing of advanced reactors and utilization of various carbon sources. Another promising approach is the production of BC from waste materials such as food, industrial, agricultural, and brewery wastes etc. which not only reduces the overall BC production cost but is also environment-friendly. Besides, exploration of novel and efficient BC producing microbial strains provides impressive boost to the BC production processes. To this end, development of genetically engineered microbial strains has proven useful for enhanced BC production. In this review, we have summarized major efforts to enhance BC production in order to make it a cost-effective biopolymer. This review can be of interest to researchers investigating strategies for enhanced BC production, as well as companies exploring pilot projects to scale up BC production for industrial applications.
A generalization of an inequality concerning the Smirnov operator
Bhat Ishrat Ul Fatima,W. M. Shah 강원경기수학회 2023 한국수학논문집 Vol.31 No.1
In this paper we establish a generalization of a result recently proved by Ganenkova and Starkov [J. Math. Anal. Appl., \textbf{476} (2019), 696-714] concerning a modified version of Smirnov operator.
Abdullah Kilic,Mohammad J. Alam,Naradah L. Tisdel,Dhara N. Shah,Mehmet Yapar,Todd M. Lasco,Kevin W. Garey 대한진단검사의학회 2015 Annals of Laboratory Medicine Vol.35 No.3
Background: The aim of this study was to develop and validate a multiplex real-time PCR assay for simultaneous identification and toxigenic type characterization of Clostridium difficile. Methods: The multiplex real-time PCR assay targeted and simultaneously detected triose phosphate isomerase (tpi) and binary toxin (cdtA) genes, and toxin A (tcdA) and B (tcdB) genes in the first and sec tubes, respectively. The results of multiplex real-time PCR were compared to those of the BD GeneOhm Cdiff assay, targeting the tcdB gene alone. The toxigenic culture was used as the reference, where toxin genes were detected by multiplex real-time PCR. Results: A total of 351 stool samples from consecutive patients were included in the study. Fifty-five stool samples (15.6%) were determined to be positive for the presence of C. difficile by using multiplex real-time PCR. Of these, 48 (87.2%) were toxigenic (46 tcdA and tcdB-positive, two positive for only tcdB) and 11 (22.9%) were cdtA-positive. The sensitivity, specificity, negative predictive value (NPV), and positive predictive value (PPV) of the multiplex real-time PCR compared with the toxigenic culture were 95.6%, 98.6%, 91.6%, and 99.3%, respectively. The analytical sensitivity of the multiplex real-time PCR assay was determined to be 103colonyforming unit (CFU)/g spiked stool sample and 0.0625 pg genomic DNA from culture. Analytical specificity determined by using 15 enteric and non-clostridial reference strains was 100%. Conclusions: The multiplex real-time PCR assay accurately detected C. difficile isolates from diarrheal stool samples and characterized its toxin genes in a single PCR run.