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Atlanto-occipital assimilation: embryological basis and its clinical significance
Hari Hara Hanusun N(Hari Hara Hanusun N ),Akanksha Singh(Akanksha Singh ),Pooja Poddar(Pooja Poddar ),Jessy J P(Jessy J P ),Neerja Rani(Neerja Rani ),Hitesh Gurjar(Hitesh Gurjar ),Seema Singh(Seema Si 대한해부학회 2024 Anatomy & Cell Biology Vol.57 No.1
Atlanto-occipital assimilation is an osseous embryological anomaly of the craniovertebral junction in which the atlas (C1) is fused to the occiput of skull. Embryologically, this assimilation may happen due to failure of the segmentation and separation of the caudal occipital and the cranial cervical sclerotome. The segmentation clock is maintained by NOTCH and WNT signalling pathways along with Hox genes and retinoic acid. This condition is likely to be a consequence of mutation in above mentioned genes. The knowledge of this assimilation may be crucial for the clinicians as it may lead to various neurovascular symptoms. The present case report involves the analysis of atlanto-occipital assimilation with its clinical significance and embryological basis.
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>
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.
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.
Hari Prasad Uppara,Sunit Kumar Singh,Nitin Kumar Labhsetwar,Mudiyaru Subrahmanya Murari,Harshini Dasari 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.7
The synthesis of binary mixed oxide Ce-Hf (CH), ternary mixed oxide Ce-Hf-Ru (CHR), and Ce-Hf-Mg (CHM) has been attempted using the PVP-assisted sol-gel method. The structural and surface morphology of the prepared catalysts were investigated and studied for the generation of superoxides (O2 )/peroxides (O2 2) species and availability of lattice oxygen (O) during soot oxidation reactions. The successfully incorporated Hf4+/Mg2+ into ceria (CH, CHM) enhances the redox potential sites on nano-flake morphology, thus produces more oxygen vacancies (□). However, Ru4+/Hf4+ was not doped into the ceria structure in CHR catalyst; it showed lesser structural distortions generating fewer oxygen vacancies. In addition, it was observed that better performing catalysts should possess lower oxidation temperature and be catalytically stable. Indeed, the ternary oxide CHR featured excellent catalytic properties when compared with the others. However, CHM was found structurally and catalytically stable with self-regenerative capability even after the repeated soot oxidation experiments. Thus, the possible soot oxidation mechanism has been proposed on the prepared catalysts.
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.
Sintering of Al-Si-Fe-Cu-Mg-SiC powder prepared by gas atomization process
Haris Rudianto 한양대학교 세라믹연구소 2012 Journal of Ceramic Processing Research Vol.13 No.S1
Aluminum powder metallurgy (P/M) composites offer high mechanical properties, low coefficient of thermal expansion and good weight strength ratio with homogeneous distribution of the reinforcement phase. This work aims to investigate the mechanical properties of pre-mixed aluminum matrix composites with different chemical compositions. Mixed powers of Al14Si-2.5Cu-0.5Mg and Al-14.5Si-1.85Cu-2.85Fe-0.8Mg with 10% volume fraction of SiC (12 µm) were used as starting powders. Reaction during sintering and chemical composition of the starting powders played important role on the sintered properties. T6 heat-treatment was carried out to produce fine precipitates to impede the movement of dislocation to increase their mechanical properties. The heat treatment involved solutionizing materials followed by water quenching and artificial aging.
Hari Ponnamma Rani,김창녕 한국화학공학회 2009 Korean Journal of Chemical Engineering Vol.26 No.4
The Dufour and Soret effects on the unsteady laminar free convective flow with mass transfer flow past a semi-infinite isothermal vertical cylinder were studied numerically. The governing partial differential equations were converted into a non-dimensional form and solved numerically by applying a Crank-Nicolson type of implicit finitedifference method with a tri-diagonal matrix manipulation and an iterative procedure. For the hydrogen-air mixture, which is a non-chemical reacting fluid, the profiles of the unsteady dimensionless velocity, temperature and concentration are shown graphically for the different values of thermal and mass Grashof numbers, thermal diffusion parameters (Soret numbers) and diffusion-thermo parameters (Dufour numbers). Finally, the simulated values of the average skin-friction coefficient, the average Nusselt number and the average Sherwood number are presented. The numerical results reveal that for an increasing Soret number or decreasing Dufour number, the time to reach the temporal maximum and the steady-state decreases for the flow variables. As the Soret number increases or the Dufour number decreases, both the skin friction and the Sherwood number increase, whereas the Nusselt number decreases.
Hari Ji Singh,Laxmi Tiwari,Pradeep Kumar Rao 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.5
Hydrofluoroethers (HFEs) are developed as a suitable for the replacement of environmentally hazardous CFCs and are termed as third generation refrigerants. One of the major products of decomposition of HFEs in the atmosphere is a fluoroester. The present study relates to the OH and Cl initiated oxidation of CF3C(O)OCH2CF3 formed from the oxidation of HFE-356mff. The latter is used as a solvent in the industry and reaches the atmosphere without any degradation. Kinetics of the titled molecule has been studied at MPWB1K/6- 31+G(d,p) level of theory. Single point energy calculations have been made at G2(MP2) level of theory and barrier heights are determined. The rate constants are calculated using canonical transition state theory. Tunnelling correction are made using one-dimensional Eckart potential barrier. The rate constant calculated during the present study are compared with the experimental values determined using relative rate method and FTIR detection technique.