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김희진(KIM Hee Jin),강민규(KANG Mill Kyu),김진학(KIM Jm Hak),박재한(PARK Jae Han),이상섭(LEE Sang Heon),이상헌(LEE Sang Sup),정인혁(CHUNG In Hyuk2) 대한체질인류학회 1997 대한체질인류학회지 Vol.10 No.2
연구자들은 한국인 어른 남녀 시신의 머리와 목 61 을 대상으로 깊은 층 육안해부를 시행하여 혀동맥의 형태를 조사하였다 혀동맥이 일어나는 유형은 위갑상동맥, 혀동맥, 그리고 얼굴동맥이 바깥목동액에서 따로 가지를 내어 나뉘는 경우가 563% 호 가장 않았으며, 얼굴동맥과 혀동맥이 강은 가지에서 얼어나 나뉘는 경우 (312%), 그리고 위 강상동액과 혀동맥이 같은 가지에서 나뉘는 경우 (12 5%) 등이 있었다. 혀동맥과 혀동맥의 둘째 부분은 덮는 목뿔혀근 과의 영대학적 관계는 각각 혀동맥의 첫째 부분이 목뿔혀근 뒤에서 심하게 휘어져 깊은 층으로 들어가는 유형 (41 2 %), 그리고 혀동맥의 첫째 부분이 목뿔혀근의 뒤쪽 근육모셔리 바로 뒤흘 지나 깊은 층으로 들어가는 경우가 661% 로 가장 많았다 목뿔혀근 깊은층에서 혀동맥의 둘째 부분이 달리는 양상은 급하게 위쪽으로 꺾역 달리다가 다시 앞쪽으로 꺾여 혀의 깊은 곳으로 들어가는 경우와 목뿔빼에서 혀쪽으로 완만한 굽이플 이루며 올라가는 경우가 비슷한 반도로 관찰되었다. 입안바닥에 분포하는 혀밑동맥이 혀동맥 셋째 부분에서 나오는 경우슨 전체의 590% 에서만 관창되었으며 그 외는 대부분 얼굴동맥의 턱끝 및동맥 가지가 턱옥뽕근응 옳고 입안바닥에 분포하였다. 따라서 연구자들은 한국인 업안바 닥에는 혀동액이 전체의 59%에서만 분포하며 그외는 영굴동액의 턱끝밑동맥 가지 , 그리고 기타 다른 동맥의 가지들이 분포한다는 사실을 확인하였다
Han, Kap-Soo,Lee, Sang Hyuk,Ryu, Han Uk,Park, Se-Hyoung,Chung, Gyung-Ho,Cho, Young I.,Jeong, Seul-Ki Hindawi 2017 BioMed research international Vol.2017 No.-
<P>The aim of the study was to calculate the arterial wall signal intensity gradient (SIG) from time-of-flight MR angiography (TOF-MRA) and represent arterial wall shear stress. We developed a new algorithm that uses signal intensity (SI) of a TOF-MRA to directly calculate the signal intensity gradient (SIG). The results from our phantom study showed that the TOF-MRA SIG could be used to distinguish the magnitude of blood flow rate as high (mean SIG ± SD, 2.2 ± 0.4 SI/mm for 12.5 ± 2.3 L/min) and low (0.9 ± 0.3 SI/mm for 8.5 ± 2.6 L/min) in vessels (<I>p</I> < 0.001). Additionally, we found that the TOF-MRA SIG values were highly correlated with various flow rates (<I>β</I> = 0.96, <I>p</I> < 0.001). Remarkably, the correlation coefficient between the WSS obtained from the computational fluid dynamics (CFD) analysis and the TOF-MRA SIG was greater than 0.8 in each section at the carotid artery (<I>p</I> < 0.001 for all <I>β</I> values). This new technique using TOF-MRA could enable the rapid calculation of the TOF-MRA SIG and thereby the WSS. Thus, the TOF-MRA SIG can provide clinicians with an accurate and efficient screening method for making rapid decisions on the risk of vascular disease for a patient in clinical practice.</P>
Han, Hyoung Kyu,Loka, Chadrasekhar,Yang, Yun Mo,Kim, Jae Hyuk,Moon, Sung Whan,Cho, Jong Soo,Lee, Kee-Sun Elsevier 2015 Journal of Power Sources Vol.281 No.-
<P><B>Abstract</B></P> <P>The preparation of different kinds of nanocomposite materials is a promising approach to alleviate the severe volume changes of Silicon anode materials for lithium-ion secondary batteries. In the present study, a novel nanocomposite Si<SUB>80</SUB>Fe<SUB>16</SUB>Cr<SUB>4</SUB> was synthesized by high-energy mechanical milling without noticeable contamination. The nano-indentation results revealed that the elastic recoverable energy range of the synthesized nanocomposite is 3.43 times higher than that of Si. The proposed nanocomposite milled for 8 and 10 h recorded a noteworthy reversible capacity of 841 and 812 mAh g<SUP>−1</SUP> even at 100th cycle, with excellent capacity retention. Remarkably, the nanocomposite exhibited a very low initial cycle (1st cycle) capacity loss ∼14%. The crystal separation of the less active silicide phases was determined after the extended cycling, which is advantageous for accommodating the stress produced by the volume changes of the active Si. The primary factors attributed to the excellent electrochemical performance were the size reduction of Si particles to nanometer scale, the formation of the highly elastic matrix, and separation of silicide phases after extended cycling.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Nano-Si/(Fe, Cr) silicide nanocomposite formed by High-energy mechanical milling. </LI> <LI> Nanocomposite with higher elastic recoverable energy accommodates Si volume change. </LI> <LI> Remarkably, lower initial cycle capacity loss of about 14% was obtained. </LI> <LI> After extended cycling, separation of less active silicide phases was observed. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Han, Myoung-Sik,Han, Im-Ho,Lee, Dahae,An, Jun Min,Kim, Su-Nam,Shin, Myoung-Sook,Yamabe, Noriko,Hwang, Gwi Seo,Yoo, Hye Hyun,Choi, Suk-Jung,Kang, Ki Sung,Jang, Hyuk-Jai The Korean Society of Ginseng 2016 Journal of Ginseng Research Vol.40 No.2
Background: Nephrotoxicity is a common side effect of medications. Panax ginseng is one of the best-known herbal medicines, and its individual constituents enhance renal function. Identification of its efficacy and mechanisms of action against drug-induced nephrotoxicity, as well as the specific constituents mediating this effect, have recently emerged as an interesting research area focusing on the kidney protective efficacy of P. ginseng. Methods: The present study investigated the kidney protective effect of fermented black ginseng (FBG) and its active component ginsenoside 20(S)-Rg3 against cisplatin (chemotherapy drug)-induced damage in pig kidney (LLC-PK1) cells. It focused on assessing the role of mitogen-activated protein kinases as important mechanistic elements in kidney protection. Results: The reduced cell viability induced by cisplatin was significantly recovered with FBG extract and ginsenoside 20(S)-Rg3 dose-dependently. The cisplatin-induced elevated protein levels of phosphorylated c-Jun N-terminal kinase (JNK), p53, and cleaved caspase-3 were decreased after cotreatment with FBG extract or ginsenoside 20(S)-Rg3. The elevated percentage of apoptotic LLC-PK1 cells induced by cisplatin treatment was significantly abrogated by cotreatment with FBG and the ginsenoside 20(S)-Rg3. Conclusion: FBG and its major ginsenoside 20(S)-Rg3, ameliorated cisplatin-induced nephrotoxicity in LLC-PK1 cells by blocking the JNKep53ecaspase-3 signaling cascade.
Trends in recent waterborne and foodborne disease outbreaks in South Korea, 2015–2019
Sang Hyuk Lee,Jae-Won Yun,Ji Hee Lee,Yeon Haw Jung,Dong Han Lee 질병관리본부 2021 Osong Public Health and Research Persptectives Vol.12 No.2
Objectives: This study analyzed trends in foodborne and waterborne diseases in South Korea between 2015 and 2019. Methods: The data consisted of information on outbreaks of waterborne and foodborne infectious diseases reported through the Korea Centers for Disease Control and Prevention (KCDC) system. We analyzed the trends and epidemiological aspects of outbreaks by month, place of occurrence, and causative pathogens in this observational study. Results: The number of outbreaks has steadily increased over the last 5 years, but the number of cases per outbreak has followed a decreasing trend. Incidence at daycare centers and preschools has been steadily increasing over consecutive years. Conclusion: The steady number of patients and decreasing number of cases per outbreak, even as the number of outbreaks has been increasing, suggest that the KCDC’s professional management system is operating effectively. It is necessary to continue improving the objectivity and efficiency of the management system and to carefully examine the increasing number of outbreaks in smaller-scale group catering facilities, such as daycare centers and preschools. Outbreaks can be prevented by closely examining those caused by unidentified pathogens and group outbreaks caused by other diseases, identifying problems, and supplementing the management system.
Peptide-templating dye-sensitized solar cells
Han, Tae Hee,Moon, Hyoung-Seok,Hwang, Jin Ok,Seok, Sang Il,Im, Sang Hyuk,Kim, Sang Ouk IOP Pub 2010 Nanotechnology Vol.21 No.18
<P>A hollow TiO<SUB>2</SUB> nanoribbon network electrode for dye-sensitized solar cells (DSSC) was fabricated by a biotemplating process combining peptide self-assembly and atomic layer deposition (ALD). An aromatic peptide of diphenylalanine was assembled into a three-dimensional network consisting of highly entangled nanoribbons. A thin TiO<SUB>2</SUB> layer was deposited at the surface of the peptide template via the ALD process. After the pyrolysis of the peptide template, a highly entangled nanotubular TiO<SUB>2</SUB> framework was successfully prepared. Evolution of the crystal phase and crystallite size of the TiO<SUB>2</SUB> nanostructure was exploited by controlling the calcination temperature. Finally, the hollow TiO<SUB>2</SUB> nanoribbon network electrode was integrated into DSSC devices and their photochemical performances were investigated. Hollow TiO<SUB>2</SUB> nanoribbon-based DSSCs exhibited a power conversion efficiency of 3.8%, which is comparable to the conventional TiO<SUB>2</SUB> nanoparticle-based DSSCs (3.5%). Our approach offers a novel pathway for DSSCs consisting of TiO<SUB>2</SUB> electrodes via biotemplating. </P>