http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Heo, Nam Su,Shukla, Shruti,Oh, Seo Yeong,Bajpai, Vivek K.,Lee, Sun Uk,Cho, Hye-Jin,Kim, Suji,Kim, Yeonho,Kim, Hae Jin,Lee, Sang Yup,Jun, Young-Si,Oh, Mi-Hwa,Han, Young-Kyu,Yoo, Seung Min,Huh, Yun Suk Elsevier 2019 Materials Science and Engineering C Vol. No.
<P><B>Abstract</B></P> <P>Bacterial pathogens of water origin have potential public threats thus suggesting the need of developing efficient and sustainable water disinfection strategies from waterborne pathogens. We set out to synthesize different controlled morphologies of graphitic carbon nitride (g-C<SUB>3</SUB>N<SUB>4</SUB>) polymer, evaluate their comparative effects on the generation of reactive oxygen species (ROS), and investigate potential applications in water purification systems. Characterization of the synthesized microstructures of g-C<SUB>3</SUB>N<SUB>4</SUB>, such as melamine-cyanuric acid (MCA)-based rosette-type, rod-type, 2D hexagonal, and 3D cubic mesoporous silica was accomplished using Fourier transform infrared (FT-IR), energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), X-ray diffractometry (XRD), and transmission electron microscopy (TEM). The microbial inhibitory potential of 2D g-C<SUB>3</SUB>N<SUB>4</SUB> photocatalyst against waterborne <I>Escherichia coli</I>, <I>Staphylococcus aureus</I>, and <I>Salmonella typhimurium</I> was evaluated based on the effective activity of 2D g-C<SUB>3</SUB>N<SUB>4</SUB> upon visible light excitations. The microbicidal efficiency of 2D g-C<SUB>3</SUB>N<SUB>4</SUB> was evident within 30 min of visible light exposure via direct interaction, while other microstructures of g-C<SUB>3</SUB>N<SUB>4</SUB> demonstrated only slight antimicrobial effects after 120 min, with insufficient ROS generation. The antimicrobial and ROS-generating effects of 2D g-C<SUB>3</SUB>N<SUB>4</SUB> depended on the type and surface area of the synthesized 2D g-C<SUB>3</SUB>N<SUB>4</SUB> material. Considering its availability and excellent disinfection activity, 2D g-C<SUB>3</SUB>N<SUB>4</SUB> obtained from simple and convenient facile synthesis is a promising solar-driven photocatalyst for clearing microbial contamination from water.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Waterborne pathogenic bacteria pose significant health risks to the public. </LI> <LI> We synthesized different morphologies of graphitic carbon nitride (g-C<SUB>3</SUB>N<SUB>4</SUB>) polymer. </LI> <LI> Synthesized microstructures of g-C<SUB>3</SUB>N<SUB>4</SUB> had potential effect on ROS generation. </LI> <LI> 2D hexagonal g-C<SUB>3</SUB>N<SUB>4</SUB> exhibited significant antimicrobial potential. </LI> <LI> 2D g-C<SUB>3</SUB>N<SUB>4</SUB> had photocatalytic inactivation efficiency in a water purifying system. </LI> </UL> </P>
Detection of Citrus Fruits using Convolution Neural Networks, YOLOv5
Yun Seok Kim,Yong Suk Chung,Seong Heo 한국원예학회 2021 한국원예학회 학술발표요지 Vol.2021 No.10
Recently, dramatic climate changes due to global warming causes severe climate disasters such as typhoon. Consequently, fruits with heavy weights falls down from strong wind leading huge damages for farmers. Although government encouraged them to be insured, the damage evaluation have been subjective not objective. Thus, farmers could not be paid properly. In addition, the statistic for total production in each farm is solely based on interview from each farm resulting in incapability to estimate the accurate production. Therefore, we developed fruit production estimation system based on deep learning. The model based on the YOLOv5 algorithm showed significant performance in AP50 0.817. Furthermore, it could count the number of fruits in the images. We are planning to develop user-friendly application in smart phones based on this method for other fruits.
Mucormycosis-related osteomyelitis of the maxilla in a post-COVID-19 patient
Yun-Hui, Kang,Sam-Sun, Lee,Moe Thu Zar, Aung,Ju-Hee, Kang,Jo-Eun, Kim,Kyung-Hoe, Huh,Min-Suk, Heo Korean Academy of Oral and Maxillofacial Radiology 2022 Imaging Science in Dentistry Vol.52 No.-
Mucormycosis is a rare, invasive fungal infection that progresses aggressively and requires prompt surgery and appropriate treatment. The number of cases of mucormycosis in coronavirus disease 2019 (COVID-19) patients has recently increased, and patients with uncontrolled diabetes mellitus are particularly at an elevated risk of infection. This report presents a case of mucormycosis-related osteomyelitis of the maxilla in a 37-year-old man with diabetes mellitus. The patient complained of severe and persistent pain in the right maxilla, accompanied by increased tooth mobility and headache. On contrast-enhanced computed tomographic images, gas-forming osteomyelitis of the right maxilla was observed. Destruction of the maxilla and palatine bone then proceeded aggressively. Sequestrectomy was performed on the right maxilla, and the histopathological diagnosis was mucormycosis. Further investigation after the first operation revealed the patient's history of COVID-19 infection.
Heo, Su-Jin,Kim, Seung-Eon,Wei, Jie,Hyun, Yong-Taek,Yun, Hui-Suk,Kim, Dong-Hwa,Shin, Ji Won,Shin, Jung-Woog Wiley Subscription Services, Inc., A Wiley Company 2009 Journal of biomedical materials research. Part A Vol.a89 No.1
<P>Novel three-dimensional scaffolds consisting of nano- and microsized hydroxyapatite (HA)/poly(ε-caprolactone) (PCL) composite were fabricated using a modified rapid-prototyping (RP) technique for bone tissue engineering applications. The size of the nano-HA ranged from 20 to 90 nm, whereas that of the micro-HA ranged from 20 to 80 μm. The scaffold macropores were well interconnected, with a porosity of 72–73% and a pore size of 500 μm. The compressive modulus of the nano-HA/PCL and micro-HA/PCL scaffolds was 3.187 ± 0.06 and 1.345 ± 0.05 MPa, respectively. The higher modulus of the nano-HA/PCL composite (n-HPC) was to be likely caused by a dispersion strengthening effect. The attachment and proliferation of MG-63 cells on n-HPC were better than that on the micro-HA/PCL composite (m-HPC) scaffold. The n-HPC was more hydrophilic than the m-HPC because of the greater surface area of HA exposed to the scaffold surface. This may give rise to better cell attachment and proliferation. Bioactive n-HA/PCL composite scaffold prepared using a modified RP technique has a potential application in bone tissue engineering. © 2008 Wiley Periodicals, Inc. J Biomed Mater Res, 2009</P>