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Krishnan, Hari B.,Kang, Beom Ryong,Hari Krishnan, Ammulu,Kim, Kil Yong,Kim, Young Cheol American Society for Microbiology 2007 Applied and environmental microbiology Vol.73 No.1
<B>ABSTRACT</B><P>Phenazine production was engineered in <I>Rhizobium etli</I> USDA9032 by the introduction of the <I>phz</I> locus of <I>Pseudomonas chlororaphis</I> O6. Phenazine-producing <I>R. etli</I> was able to inhibit the growth of <I>Botrytis cinerea</I> and <I>Fusarium oxysporum</I> in vitro. Black bean inoculated with phenazine-producing <I>R. etli</I> produced brownish Fix<SUP>−</SUP> nodules.</P>
Polarization Re-Configurable Antenna with Increase Gain for Small Satellites
Haris Mohammad,Khalil Ruhul Amin,Saeed Nasir 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.6
Future small satellites require the development of reconfi gurable antennas. Designing such antennas, especially single port patch antennas with circular polarization is a challenging task. Therefore, we propose both right-hand/left-hand circularly polarized (RHCP/LHCP) antenna which can reconfi gure. The proposed antenna follows patch topology with E-shape that is single-layer and single-feed with two RF switches. The switches can alter the polarization in real-time. We also show various properties of the proposed antenna, such as radiation pattern, impedance matching, axial ratio, and bandwidth through simulations and measurements. The proposed model shows excellent performance and agrees well with the measurements. The performance of the antenna shows an eff ective bandwidth of 2.45 GHz–2.82 GHz with a maximum gain of 9.88 dB at 2.55 GHz. The symmetry of the antenna radiation is preserved by switching between the LHCP and RHCP polarization modes.
Hary Yu,Sun Min Park,Min Suk Rhee 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
This study aimed to propose themes for future viral research, with increasing considerations and demands on viral food safety. National strategies and research and development (R&D) projects, completed or in progress within 10 years, were investigated in food safety agency websites/reports of five countries (United States, United Kingdom, Germany, Canada, and Australia/New Zealand). The research themes were extracted, listed, and further categorized into 10 major subdivisions ("detection methods", "genetic analysis", "surveillance", etc.) based on the opinions of food safety experts. Research projects regarding "basic characterization", such as survival or resistance analysis, took the highest proportion, followed by projects on "epidemiology" or "disinfection". Moreover, foodborne (norovirus, rotavirus, hepatitis A/E virus) and zoonotic viruses (influenza A virus, avian influenza virus, coronavirus including SARS-CoV-2) focused in predominant numbers of the global research projects were identified. The results of this study support the importance and urgency of future national research projects which could ensure virus issues in aspects of food safety.
Hary Yu,Sun Min Park,Min Suk Rhee 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
After the occurrence of the COVID-19 pandemic, there is a growing concern on potential risks of new-emerging pathogens and their link to food safety. This study tried to suggest the virus candidates which could infect humans via foods/food-related environments. A prioritization process was established for the candidates, of which the information was investigated by reviewing websites or reports of international microbiological authorities and academic researches. Prioritization was based on (1) whether the authorities were providing the hazard information, (2) whether it could cause respiratory diseases (respiratory virus) or zoonosis (zoonotic virus), and (3) whether its transmission via foods/environments has been reported. A total of 85 viruses were initially obtained and 48 relevant viruses, including 12 respiratory and 41 zoonotic viruses, were sorted out. Among 48 viruses, pathogens that provoked food (e.g. MERS-CoV, Hepatitis E, Lassa virus, Nipah virus) or animal/environment-mediated infections (e.g. SARS-CoV, Influenza A virus) were nominated as a high priority. This study proposes a blueprint for future microbiological management strategies regarding viral food safety.
Hari Madhav,Paramjit Singh,Neetika Singh,Gautam Jaiswar 한국고분자학회 2017 Macromolecular Research Vol.25 No.7
The main object of this study is to analyse the effects of different functional groups on the thermal and microbial properties of nanocomposites of poly(methyl methacrylate) (PMMA). For this, amino functionalized PMMA were synthesized by using post polymer functionalization method. In this method, PMMA was treated with four different amino compounds to obtain functionalized PMMA. To determine the structural features, functionalized PMMA was characterized with Fourier transform infrared (FTIR) spectroscopy. These functionalized PMMA were used to prepare functionalized polymer nanocomposites with addition of nanoclay and Ag nanoparticles into the polymer matrix. These nanocomposites were further studied against thermal and antibacterial properties. Sophisticated analytical techniques i.e., thermal gravimetric analysis (TGA), differential thermal analysis (DTA), and derivative thermogravimetric curve (DTG) were used to characterize the thermal properties of nanocomposites. Antibacterial study was performed by using disc diffusion method against bacteria E. coli. The thermal results showed that, the maximum degradation temperature (Td) increases up to 85.5oC in air atmosphere in case of sample HM2. Antibacterial study showed that, the bacteria have least effect on the silver containing functionalized polymer nanocomposites.
Visiting Bitter Gourd (Momordica charantia) from a Breeding Perspective: A Review
Hari Kesh,Prashant Kaushik 한국육종학회 2020 Plant Breeding and Biotechnology Vol.8 No.3
Bitter gourd is an important vegetable of the family Cucurbitaceae, cultivated mainly in humid and subtropical Asia. Bitter gourd is a vegetable with immense health benefits due to the presence of medicinal compounds such as charatin, vicine, and polypeptide-p, which play essential roles in lessening blood glucose levels. Moreover, bitter gourd fruits are particularly rich in vitamin C, minerals, and carotenes. Here, an effort has been made to critically evaluate the extent of achievements during the enhancement and enactment of bitter gourd breeding programs with the use of latest technologies. Broadening the genetic base of cultivated bitter gourd varieties as a result of enrichment of existing resources by using wild species in breeding programs. Practical seed production technological know-how along with the use of the MS system (male sterility)/chemical-induced sterility procedure is nonetheless vital to cope with market demands. Superior yielding bitter gourd hybrids combining early maturity and resistance to biotic and abiotic stresses are regularly needed to cope with the challenge of bitter gourd production.
Hari, Galla Sri,Lee, Yong Rok WILEY-VCH Verlag 2010 Chem Inform Vol.41 No.23
<P>ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.</P>
Hari, Galla Sri,Lee, Yong Rok Georg Thieme Verlag Stuttgart, New York 2010 Synthesis Vol.2010 No.3
<P>A simple and efficient one-pot synthetic approach was used for the preparation of biologically interesting spirooxindole derivatives by means of three-component reactions of isatins, malononitrile, and 1,3-dicarbonyl compounds catalyzed by ethylenediamine diacetate (EDDA) in an aqueous medium. This method is of great value because of its environmentally benign character, high yield, and easy handling.</P>
Synthesis of TiO2-polycrystalline microspheres and its microstructure at various high temperatures
Hari Sutrisno 한양대학교 세라믹연구소 2017 Journal of Ceramic Processing Research Vol.18 No.5
TiO2-polycristalline microspheres were prepared by wet chemical synthesis using titanium aquo oxo chloride([Ti8O12(H2O)24]Cl8.HCl.7H2O) as titanium source. The morphology and structure of sample was observed using highresolution scanning electron microscopy (HR-SEM), high resolution transmission electron microscopy (HR-TEM), FT-Ramanspectroscopy, FT-IR spectroscopy, X-ray diffraction (XRD) and high temperature X-ray diffraction (HT-XRD). Microstructureof TiO2 phases were determined from HT-XRD measurement data at various temperatures from 100 oC to 1000 oC at intervalsof 50 oC. The morphology of sample shows a distribution of microspheres of approximately 0.5 to 1.0 mm. Detailedmeasurements of sample from XRD spectra exhibit monoclinic structure (TiO2(B) phase) of TiO2-polycristalline microspheres. The HT-XRD results indicated that diffraction peaks of TiO2-polycrystalline microspheres are indexed as TiO2(B) phase from100 to 250 oC and as anatase phase from 300 to 650 oC, while mixed crystals of anatase and rutile were observed attemperatures measurement from 700 to 800oC. Finally, pure rutile phase has formed at temperatures measurement from 850to 1000 oC. The results of microstructure analysis show that the anatase structure could be indexed to I41/amd (no. 141) spacegroup with tetragonal symmetry at temperatures measurement: 600 and 750 oC, while the rutile structure could be indexedto P42/mnm (no. 136) space group with tetragonal symmetry at 750 and 950 oC.