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Hong, Sung-Soo,Son, Sang-Yong,Shin, Ho-Jung,Cui, Long-Hai,Hur, Hoon,Han, Sang-Uk The Korean Gastric Cancer Association 2016 Journal of gastric cancer Vol.16 No.4
Purpose: It is hypothesized that robotic gastrectomy may surpass laparoscopic gastrectomy after the operators acquire long-term experience and skills in the manipulation of robotic arms. This study aimed to evaluate the long-term learning curve of robotic distal gastrectomy (RDG) for gastric cancer compared with laparoscopic distal gastrectomy (LDG). Materials and Methods: From October 2008 to December 2015, patients who underwent LDG (n=809) were matched to patients who underwent RDG (n=232) at a 1:1 ratio, by using a propensity score matching method after stratification for the operative year. The surgical outcomes, such as trends of operative time, blood loss, and complication rate, were compared between the two groups. Results: The RDG group showed a longer operative time (171.3 minutes vs. 147.6 minutes, P<0.001) but less estimated blood loss (77.6 ml vs. 116.6 ml, P<0.001). The complication rate and postoperative recovery did not differ between the two groups. The RDG group showed a longer operative time and similar estimated blood loss compared with the LDG group after 5 years of experience (operative time: 159.2 minutes vs. 136.0 minutes in 2015, P=0.003; estimated blood loss: 72.9 ml vs. 78.1 ml in 2015, P=0.793). Conclusions: In terms of short-term surgical outcomes, RDG may not surpass LDG after a long-term experience with the technique.
Roles of NMDA NR2B Subtype Receptor in Prefrontal Long-Term Potentiation and Contextual Fear Memory
Zhao, Ming-Gao,Toyoda, Hiroki,Lee, Yong-Seok,Wu, Long-Jun,Ko, Shanelle W.,Zhang, Xue-Han,Jia, Yongheng,Shum, Fanny,Xu, Hui,Li, Bao-Ming,Kaang, Bong-Kiun,Zhuo, Min Elsevier 2005 Neuron Vol.47 No.6
<P><B>Summary</B></P><P>Cortical plasticity is thought to be important for the establishment, consolidation, and retrieval of permanent memory. Hippocampal long-term potentiation (LTP), a cellular mechanism of learning and memory, requires the activation of glutamate N-methyl-D-aspartate (NMDA) receptors. In particular, it has been suggested that NR2A-containing NMDA receptors are involved in LTP induction, whereas NR2B-containing receptors are involved in LTD induction in the hippocampus. However, LTP in the prefrontal cortex is less well characterized than in the hippocampus. Here we report that the activation of the NR2B and NR2A subunits of the NMDA receptor is critical for the induction of cingulate LTP, regardless of the induction protocol. Furthermore, pharmacological or genetic blockade of the NR2B subunit in the cingulate cortex impaired the formation of early contextual fear memory. Our results demonstrate that the NR2B subunit of the NMDA receptor in the prefrontal cortex is critically involved in both LTP and contextual memory.</P>
Chen, Yong-Liang,Cen, Song,Yao, Zhen-Han,Long, Yu-Qiu,Long, Zhi-Fei Techno-Press 2003 Structural Engineering and Mechanics, An Int'l Jou Vol.15 No.1
A new simple 3-node triangular flat-shell element with standard nodal DOF (6 DOF per node) is proposed for the linear and geometrically nonlinear analysis of very thin to thick plate and shell structures. The formulation of element GT9 (Long and Xu 1994), a generalized conforming membrane element with rigid rotational freedoms, is employed as the membrane component of the new shell element. Both one-point reduced integration scheme and a corresponding stabilization matrix are adopted for avoiding membrane locking and hourglass phenomenon. The bending component of the new element comes from a new generalized conforming Kirchhoff-Mindlin plate element TSL-T9, which is derived in this paper based on semiLoof constrains and rational shear interpolation. Thus the convergence can be guaranteed and no shear locking will happen. Furthermore, a simple hybrid procedure is suggested to improve the stress solutions, and the Updated Lagrangian formulae are also established for the geometrically nonlinear problems. Numerical results with solutions, which are solved by some other recent element models and the models in the commercial finite element software ABAQUS, are presented. They show that the proposed element, denoted as GMST18, exhibits excellent and better performance for the analysis of thin-think plates and shells in both linear and geometrically nonlinear problems.
Han, Yan-Guo,Liu, Gui-Qiong,Jiang, Xun-Ping,Xiang, Xing-Long,Huang, Yong-Fu,Nie, Bin,Zhao, Jia-Yu,Nabeel, Ijaz,Tesema, Birhanu Asian Australasian Association of Animal Productio 2018 Animal Bioscience Vol.31 No.6
Objective: The aim of this study was to investigate the reversibility and safety of KISS1 metastasis suppressor (KISS1) gene vaccine in immunocastration. Methods: Six eight-week old ram lambs were randomly divided into vaccinated and control groups. The vaccine (1 mg/ram lamb) was injected at weeks 0, 3, and 6 of the study. Blood samples were collected from the jugular vein before primary immunization and at weeks 2, 4, 6, 10, 14, 22, and 30 after primary immunization. All ram lambs were slaughtered at 38 weeks of age, and samples were collected. Results: The specific anti-KISS1 antibody titers in vaccinated animals were significantly higher and the serum testosterone level was significantly lower than those in the control groups from week 4 to 14 after primary immunization (p<0.05). No significant difference was observed at weeks 22 and 30 after the primary immunization. Similar results were also found for scrotal circumference, testicular weight, length, breadth, and spermatogenesis in seminiferous tubules in week 30 after primary immunization. KS (KISS1-hepatitis B surface antigen S) fusion fragment of KISS1 gene vaccine was not detected in host cell genomic DNA of 9 tissues of the vaccinated ram lambs by polymerase chain reaction. Conclusion: The effects of KISS1 gene vaccine in immunocastration were reversible and no integration events were recorded.
Experimental Study on the Performance of a Bidirectional Hybrid Piezoelectric-Hydraulic Actuator
Xiao Long Jin,Ngoc San Ha,Yong Zhe Li,Nam Seo Goo,Jangmi Woo,Han Seo Ko,Tae Heun Kim,Chang Seop Lee 한국항공우주학회 2015 International Journal of Aeronautical and Space Sc Vol.16 No.4
The piezoelectric-hydraulic actuator is a hybrid device that consists of a hydraulic pump driven by a piezo-stack coupled to a conventional hydraulic cylinder. The actuator is of compact size, but can produce a moderate energy output. Such hybrid actuators are currently being researched and developed in many industrialized countries due to the requirement for high performance and compact flight systems. In a previous study, we designed and manufactured a unidirectional hybrid actuator. However, the blocking force was not as high as expected. Therefore, in this study, we redesigned the pump chamber and hydraulic cylinder and also improved the system by removing the air bubbles. Two different types of piezo-stacks were used. In order to achieve bidirectional capabilities in the actuator, commercial solenoid valves were used to control the direction of the output cylinder. Experimental testing of the actuator in unidirectional and bidirectional modes was performed to examine performance issues related to driving frequency, bias pressure, reed valve thickness, etc. The results showed that the maximum blocking force was measured as 970.2N when the frequency was 185Hz.
Temperature dependence of the critical points of monolayer MoS2 by ellipsometry
Park, Han Gyeol,Kim, Tae Jung,Kim, Hwa Seob,Yoo, Chang Hyun,Barange, Nilesh S.,Le, Van Long,Kim, Hyoung Uk,Senthilkumar, Velusamy,Le, Chinh Tam,Kim, Yong Soo,Seong, Maeng-Je,Kim, Young Dong Taylor Francis 2016 Applied spectroscopy reviews Vol.51 No.7
Hai-long Piao,Yuan-hu Xuan,Su Hyun Park,제병일,Soon Ju Park,Sung Han Park,김철민,Jin Huang,Guo Kui Wang,김민정,강상모,이인중,Taek-Ryoun Kwon,Yong Hwan Kim,Un-sang Yeo,이기환,손대영,한창덕 한국분자세포생물학회 2010 Molecules and cells Vol.30 No.1
Calcineurin B-like protein-interacting protein kinases (CIPKs) are a group of typical Ser/Thr protein kinases that mediate calcium signals. Extensive studies using Arabi-dopsis plants have demonstrated that many calcium sig-natures that activate CIPKs originate from abiotic stresses. However, there are few reports on the functional demon-stration of CIPKs in other plants, especially in grasses. In this study, we used a loss-of-function mutation to charac-terize the function of the rice CIPK gene OsCIPK31. Expo-sure to high concentrations of NaCl or mannitol effected a rapid and transient enhancement of OsCIPK31 expression. These findings were observed only in the light. However, longer exposure to most stresses resulted in down-regulation of OsCIPK31 expression in both the presence and absence of light. To determine the physiological roles of OsCIPK31 in rice plants, the sensitivity of oscipk31::Ds, which is a transposon Ds insertion mutant, to abiotic stresses was examined during germination and seedling stages. oscipk31::Ds mutants exhibited hypersensitive phenotypes to ABA, salt, mannitol, and glucose. Com-pared with wild-type rice plants, mutants exhibited re-tarded germination and slow seedling growth. In addition, oscipk31::Ds seedlings exhibited enhanced expression of several stress-responsive genes after exposure to these abiotic stresses. However, the expression of ABA meta-bolic genes and the endogenous levels of ABA were not altered significantly in the oscipk31::Ds mutant. This study demonstrated that rice plants use OsCIPK31 to modulate responses to abiotic stresses during the seed germination and seedling stages and to modulate the expression of stress-responsive genes.
Zhao-Yong Zhu,Qing-Ming Shi,Bao-Feng Han,Xian-Feng Wang,Sheng Qiang,Chun-Long Yang 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.9
Twenty novel tetramic acid derivatives (E)-3-(1-(alkyloxyamino)ethylidene)-1-alkylpyrrolidine-2,4-diones were synthesized by the reaction of 3-(1-hydroxyethylidene)pyrrolidine-2,4-diones with O-alkyl hydroxylamines. The title compounds were confirmed by IR, 1H NMR, MS and elemental analysis. The structure of compound 6r was further verified by X-ray diffraction crystallography. The bioassays showed that most of the title compounds exhibited noticeable herbicidal and fungicidal activities.
고순도 폐냉매 정제 재생을 위한 연속 증류 컬럼 설계 및 에너지 최적화
최한솔 ( Han-sol Choe ),( Nguyen Van Duc Long ),이동영 ( Dong-young Lee ),이문용 ( Moon-yong Lee ),박선용 ( Sun-yong Park ),황병봉 ( Byeng-bong Hwang ) 한국폐기물자원순환학회(구 한국폐기물학회) 2021 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2021 No.-
폐냉매 재생은 여러 유형의 냉각 루프에서 사용된 냉매 가스를 엄격하게 고순도 수준으로 처리하여 시장에 재진입하게 된다. 이 처리 방법은 냉매 가스가 가지는 치명적인 오존층 파괴 정도를 줄이는데 큰 기여가 된다. 따라서 본 연구에서는 냉매 재생을 위한 연속 증류 컬럼이 제안된다. 해당 과제에서 풀어야 할 숙제는 바로 하나의 컬럼으로 여러가지 폐냉매 혼합물을 처리할 수 있어야 한다는 것이다. 여러 냉매 혼합물의 VLE 경향성에 대한 실험 데이터를 시뮬레이션 결과와 비교하여 적절한 열역학 모델로 REFPROP을 선택하고 Aspen Hysys V.10을 사용하여 본 연구의 모든 시뮬레이션을 수행하였다. 냉매 혼합물 R-22 & R-410a / R-32 & R-125 /R-12 & R-134a를 포함한 세 가지 대중적인 혼합물을 처리할 수 있도록 shortcut & rigorous 방법을 통해 증류 공정을 설계하고 최적화하였다.
Cui, Long-Hai,Son, Sang-Yong,Shin, Ho-Jung,Byun, Cheulsu,Hur, Hoon,Han, Sang-Uk,Cho, Yong Kwan Hindawi Publishing Corporation 2017 Gastroenterology Research and Practice Vol.2017 No.-
<P><I>Background</I>. Although Billroth II (BII) reconstruction is simpler and faster than Billroth I or Roux-en-Y (RY) reconstruction in patients undergoing totally laparoscopic distal gastrectomy (TLDG), BII reconstruction is associated with several complications, including more severe bile reflux. BII Braun anastomosis may be a better alternative to RY reconstruction.<I> Methods</I>. This retrospective study included 56 consecutive patients who underwent TLDG for gastric cancer, followed by BII Braun or RY reconstruction, between January 2013 and December 2015. Surgical outcomes, including length of operation, quantity of blood lost, and postoperative complications, were compared in the two groups.<I> Results</I>. Clinicopathological characteristics did not differ between the BII Braun and RY groups. Mean length of operation was significantly longer in the RY than the BII Braun group (157.3 min versus 134.6 min,<I> p</I> < 0.010), but length of hospital stay, blood loss, and complication rate did not differ between the two groups. Ileus occurred in three patients (10.0%) in the RY group. Endoscopic findings 6 months after surgery showed bile reflux in seven (28%) patients in the BII Braun group and five (17.2%) in the RY group (<I>p</I> = 0.343), but no significant differences in rate of gastric residue or degree of gastritis in the remnant stomach in the two groups.<I> Conclusions</I>. B-II Braun anastomosis is a good alternative to RY reconstruction, reducing length of operation and ileus after TLDG.</P>