Crosslinked anion exchange membranes with primary diamine-based crosslinkers for vanadium redox flow battery application

Cha, Min Suc,Jeong, Hwan Yeop,Shin, Hee Young,Hong, Soo Hyun,Kim, Tae-Ho,Oh, Seong-Geun,Lee, Jang Yong,Hong, Young Taik Elsevier 2017 Journal of Power Sources Vol.363 No.-

<P><B>Abstract</B></P> <P>A series of polysulfone-based crosslinked anion exchange membranes (AEMs) with primary diamine-based crosslinkers has been prepared via simple a crosslinking process as low-cost and durable membranes for vanadium redox flow batteries (VRFBs). Chloromethylated polysulfone is used as a precursor polymer for crosslinked AEMs (CAPSU-x) with different degrees of crosslinking. Among the developed AEMs, CAPSU-2.5 shows outstanding dimensional stability and anion (Cl<SUP>−</SUP>, SO<SUB>4</SUB> <SUP>2−</SUP>, and OH<SUP>−</SUP>) conductivity. Moreover, CAPSU-2.5 exhibits much lower vanadium ion permeability (2.72 × 10<SUP>−8</SUP> cm<SUP>2</SUP> min<SUP>−1</SUP>) than Nafion 115 (2.88 × 10<SUP>−6</SUP> cm<SUP>2</SUP> min<SUP>−1</SUP>), which results in an excellent coulombic efficiency of 100%. The chemical and operational stabilities of the membranes have been investigated via ex situ soaking tests in 0.1 M VO<SUB>2</SUB> <SUP>+</SUP> solution and in situ operation tests for 100 cycles, respectively. The excellent chemical, physical, and electrochemical properties of the CAPSU-2.5 membrane make it suitable for use in VRFBs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The crosslinking between polymer chains are constructed by 4,4′-diaminobenzophenone. </LI> <LI> The crosslinked AEMs were fabricated by commercial polysulfone (PSU; Udel<SUP>®</SUP> P-3500). </LI> <LI> The crosslinked AEM based on PSU indicated good chemical and dimensional stability. </LI> <LI> The performance of crosslinked AEM showed high EE (86%) with high capacity retention. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Preparation and characterization of crosslinked anion exchange membrane (AEM) materials with poly(phenylene ether)-based short hydrophilic block for use in electrochemical applications

Cha, Min Suc,Lee, Jang Yong,Kim, Tae-Ho,Jeong, Hwan Yeop,Shin, Hee Young,Oh, Seong-Geun,Hong, Young Taik Elsevier 2017 Journal of membrane science Vol.530 No.-

<P><B>Abstract</B></P> <P>Herein, our group report the investigation of cross-linked copolymer anion exchange membrane (AEM) materials with a partially rigid backbone structure based on poly(phenylene ether). Two types of quaternized AEM materials, QCPPAE-2/1 and QCPPAE-4/1, with an ion exchange capacity (IEC) of 1.08 and 1.75meq/g, respectively, were synthesized. The cross-linked AEMs exhibited a low water uptake (WU) and dimensional change and outstanding anion (Cl<SUP>−</SUP>, SO<SUB>4</SUB> <SUP>2−</SUP>, and OH<SUP>−</SUP>) conductivities. The nanoscale phase-separated morphologies of the polymer membranes were characterized using small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). The synthesized membranes were introduced as a solid electrolyte into a vanadium redox flow battery (VRFB) and an anion exchange membrane fuel cell (AEMFC). The QCPPAE-2/1 membrane showed excellent coulombic efficiency (CE) of 99%, voltage efficiency (VE) of 88% and energy efficiency (EE) of 89% in VRFBs. Within AEMFCs, these membranes generated an outstanding power density as high as 106mW/cm<SUP>2</SUP> at 60°C.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Rigid backbone structure was synthesized via Ni (0)-cross coupling reaction. </LI> <LI> The crosslinking between polymer chains are constructed by 4,4’-diaminobenzophenone. </LI> <LI> The performance of crosslinked AEM showed high EE (88%>) and CE (99%>) in VRFB. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

어깨충돌증후군에 대한 침치료의 효과: 체계적 문헌고찰 및 메타분석

안정훈 ( Jeong Hoon Ahn ),배건희 ( Gun Hee Bae ),김병준 ( Byung-jun Kim ),박인화 ( In-hwa Park ),허인 ( In Heo ),차윤엽 ( Yun-yeop Cha ) 한방재활의학과학회 2024 한방재활의학과학회지 Vol.34 No.1

Objectives This review was conducted to evaluate the therapeutic effects of manual acupuncture (MA) for shoulder impingement syndrome (SIS). Methods We searched 12 electronic databases (DBpia, Korean studies Information Service System [KISS], Oriental Medicine Advanced Searching Integrated System [OASIS], Research Information Sharing Service [RISS], China National Knowledge Infrastructure [CNKI], CINAHL, Clinical Key, Cochrane Library, Embase, JAMA, PubMed, Web of Science) to find randomized-controlled clinical trials (RCTs) investigating therapeutic effects of MA for treating SIS. Shoulder Pain and Disability Index scores and numeric pain rating scale or visual analogue scale were analyzed as the main evaluation criteria. Results Among 181 studies, 169 were screened and only 12 RCTs were eligible in our review. Finally, 11 RCTs could be statistically analyzed. MA was more effective than sham treatment and physical therapy in terms of reducing pain (p=0.003, p=0.0007 each). Electroacupuncture (EA) showed more significant effect than physical therapy (PT) for improving shoulder pain (p<0.00001) and shoulder functionality (p<0.00001). Conclusions These results suggest that MA and EA could be superior option for treating SIS than sham treatment or PT. However this review has its limitations due to the small sample size and lack of well-designed RCTs that were included in the study. Further well-designed RCTs are necessary to provide high-level evidence. (J Korean Med Rehabil 2024;34(1):83-95)

Acupuncture for Chronic Low Back Pain: A Multicenter, Randomized, Patient-Assessor Blind, Sham-Controlled Clinical Trial

Cho, Yu-Jeong,Song, Yun-Kyung,Cha, Yun-Yeop,Shin, Byung-Cheul,Shin, Im-Hee,Park, Hi-Joon,Lee, Hyang-Sook,Kim, Koh-Woon,Cho, Jae-Heung,Chung, Won-Suk,Lee, Jun-Hwan,Song, Mi-Yeon Lippincott Williams Wilkins, Inc. 2013 1528-1159) Vol.38 No.7

STUDY DESIGN.: Multicenter, randomized, patient-assessor blind, sham-controlled clinical trial. OBJECTIVE.: To investigate the efficacy of acupuncture treatment with individualized setting for reduction of bothersomeness in participants with chronic low back pain (cLBP). SUMMARY OF BACKGROUND DATA.: Low back pain is one of the main reasons of disability among adults of working age. Acupuncture is known as an effective treatment of cLBP, but it remains unclear whether acupuncture is superior to placebo. METHODS: One hundred thirty adults aged 18 to 65 years with nonspecific LBP lasting for at least last 3 months prior to the trial participated in the study from 3 Korean medical hospitals. Participants received individualized real acupuncture treatments or sham acupuncture treatments for more than 6 weeks (twice a week) from Korean Medicine doctors. Primary outcome was change of visual analogue scale (VAS) score for bothersomeness of cLBP. Secondary outcomes included VAS score for pain intensity and questionnaires including Oswestry Disability Index, general health status (Short Form-36), and Beck Depression Inventory (BDI). RESULTS: There were no baseline differences observed between the 2 groups, except in the Oswestry Disability Index. One hundred sixteen participants finished the treatments and 3- and 6-month follow-ups, with 14 subjects dropping out. Significant difference in VAS score for bothersomeness and pain intensity score of cLBP has been found between the 2 groups (P < 0.05) at the primary end point (8 wk). In addition, those 2 scores improved continuously until 3-month follow-up (P = 0.011, P = 0.005, respectively). Oswestry Disability Index, the Beck Depression Inventory, and Short Form-36 scores were also improved in both groups without group difference. CONCLUSION.: This randomized sham-controlled trial suggests that acupuncture treatment shows better effect on the reduction of the bothersomeness and pain intensity than sham control in participants with cLBP.

풀림방지 Curved-Nut 설계 및 성능 시험

차민철(Min Cheol Cha),강호성(Ho Sung Kang),김도엽(Do Yeop Kim),이석용(Suk Yong Lee),정희종(Hui Jong Jeong),이응석(Eung Suk Lee) 대한기계학회 2017 大韓機械學會論文集A Vol.41 No.3

현재 진동이 심한 산업현장에서 많은 종류의 풀림방지 너트가 사용되고 있다. 왜냐하면 진동의 풀림은 큰 사고를 유발할 수 있기 때문이다. 하지만 대부분의 풀림방지너트는 복잡한 가공과정을 거치기 때문에 가격 경쟁력에서 불리하다. 때문에 본 연구에서는 가공이 쉬운 새로운 유형의 커브드 너트를 개발 하고자 한다. 탄성에너지와 너트의 풀림메커니즘 사이의 탄성에너지를 연구하고 분석한 뒤, 나사의 풀림테스트를 한다. 커브드 너트는 기존너트에 밀링 공구를 이용하여 수직으로 한번 또는 두 번 너트의 밑면을 가공한다. 결과적으로 너트의 탄성에너지가 클수록 너트의 풀림을 막게 된다. 본 연구에서는 NAS3350의 진동테스트 장비를 이용하여 시험을 하고 결과를 분석한다. Many types of locking nut are commercializing in the various industries where has heavy vibration. Because nut"s loosing causes a serious accident. But the most locking nuts are too expensive as the complicate manufacturing process. In this study, we design the new type of locking nut, "Curved-Nut" that is relatively simple making process. We study a relation between the elastic energy and the nut loosing mechanism. So it is analysed, the elastic energy of Curved-Nut comparing with the locking test. The Curved-Nut was manufactured on the commercial nut using a milling tool with horizontal cutting, one or two time under the nut. As the result, the more elastic energy the more prevent the loosing of the nut. We verified the performance of the loosing nut using the vibration testing equipment (NAS3350).

면역적격환자에서 발생한 위막성 아스페르길루스 기관기관지염

차승익 ( Seung Ick Cha ),신경민 ( Kyung Min Shin ),유승수 ( Seung Soo Yoo ),정지윤 ( Ji Yun Jeong ),윤길숙 ( Ghil Suk Yoon ),이신엽 ( Shin Yeop Lee ),김창호 ( Chang Ho Kim ),박재용 ( Jae Yong Park ),정태훈 ( Tae Hoon Jung ) 대한결핵 및 호흡기학회 2008 Tuberculosis and Respiratory Diseases Vol.65 No.5

Aspergillus tracheobronchitis (ATB), a variant of invasive pulmonary aspergillosis, is characterized by extensive tracheobronchitis and pseudomembrane formation. ATB usually occurs in immunocompromised patients with a high fatality rate. We report a case of ATB in a previously healthy patient who responded well to antifungal therapy.

약징(藥徵)과 본초학 교과서의 통증 질환 관련 공통 약물에 대한 비교 분석

정준교 ( Jun Kyo Jeong ),박원형 ( Won Hyung Park ),차윤엽 ( Yun Yeop Cha ) 한방재활의학과학회 2015 한방재활의학과학회지 Vol.25 No.1

Objectives The purpose of this study is to compare the common herbs for pain related disease between Yak-Jing and textbook of herbology. Methods We searched the formation of Koho and theory of Todo yoshimasu. We selected the common herbs that is used for pain related disease in Yak-Jing and textbook of herbology. These herbs were compared with each other. Result 1. Common Herbs for pain related disease are Ephedrae Herba (麻黃), Aconiti Lateralis Preparata Radix (附子), Euphorbiae Kansui Radix (甘遂), Euphorbiae pekinensis Radix (大戟) Daphnis Genkwa Flos (莞花), Atractylodis Rhizoma (朮), Paeonia Radix Rubra (芍藥), JujubaeFructus (大棗), Gypsum (石膏), Anemarrhenae Rhizoma (知母), Cinnamomi Ramulus (桂枝), Poria (茯零), Rhei Rhizoma (大黃), Natrii Sulfas (芒草), Pueraiae Radix (葛根). There are some difference between textbook of herbology and Yak-Jing about Aconiti Lateralis Preparata Radix (附子), Paeonia Radix Rubra (芍藥), Atractylodis Rhizoma (蒼朮), Pueraiae Radix (葛根). 2. Preparata Radix (附子) excrete water poisons (水毒) in Yak-Jing, but it has the effect of restore yang and tonify fire (回陽補火) in textbook of herbology. 3. Paeonia Radix Rubra (芍藥) is effective for pathological condition caused by the formation of the band and spasm (結實拘攣) in Yak-Jing, but it is to cure heat pattern in textbook of herbology. 4. Atractylodis Rhizoma (蒼朮) has the effect of water-draining (利水) in Yak-Jing, but it has the effect of dispersing (發散) in textbook of herbology. 5. Pueraiae Radix (葛根) is used in dyspnea and sweating (喘而汗出) in Yak-Jing, but it is to cure engender fluid (生津), skin disease, diarrhea in textbook of herbology. Conclusion There are some difference between textbook of herbology and Yak-Jing in the herb medicine that is used in pain related disease. (J Korean Med Rehab 2015; 25(1):53-61)

근위부 조기위암에서 복강경보조 위전절제술식과 개복하위전절제술식의 비교

박종민(Jong-Min Park),오승엽(Seung-Yeop Oh),차진우(Jin-Woo Cha),최수윤(Su-Yun Choi),이호원(Ho-Won Lee),김홍(Hong Kim),정인호(In Ho Jeong),진성호(Sung-Ho Chin),김명욱(Myung-Wook Kim),조용관(Yong Kwan Cho),한상욱(Sang-Wook Han) 대한외과학회 2007 Annals of Surgical Treatment and Research(ASRT) Vol.72 No.4

Purpose: The purpose of this study was to compare the short-term clinical outcomes of laparoscopy-assisted total gastrectomy (LATG) with conventional open total gastrectomy (OTG) for treating proximal early gastric cancer and to determine the usefulness of the LATG procedure. Methods: The records of 21 patients who underwent LATG for proximal early gastric cancer from January 2004 to August 2006 were retrospectively reviewed and compared with those records of 20 patients who underwent OTG during the same period. Results: The patient characteristics, including gender, age, body mass index and comorbidities, were similar between the two groups. Combined resections were more frequently done in the OTG group than in the LATG group. The blood loss in the LATG group was significantly less than that in the OTG group. The operating time, time to first flatus and initial oral intake and the postoperative hospital stay were significantly shorter in the LATG group. The number of resected lymph nodes, lymph node metastasis, histologic type, TNM stage, complications, leukocyte counts and serum lactic acid levels were not significantly different between the two groups. Conclusion: LATG is a technically safe and feasible procedure for treating proximal early gastric cancer. Prospective multi-center trials are necessary to establish LATG as the standard treatment for proximal early gastric cancer.

좌골신경통에 대한 전침 치료: 체계적 문헌고찰 및 메타분석

김예은 ( Ye-eun Kim ),안정훈 ( Jeong-hoon Ahn ),차윤엽 ( Yun-yeop Cha ),한인식 ( In-sik Han ),허인 ( In Heo ),박인화 ( In-hwa Park ) 한방재활의학과학회 2022 한방재활의학과학회지 Vol.32 No.2

Objectives This study was conducted to evaluate the effect of electro-acupuncture for sciatica. Methods We searched 13 online databases (Kmbase, Research Information Sharing Service [RISS], National Digital Science Library [NDSL], Oriental Medicine Advanced Searching Integrated System [OASIS], Koreanstudies, Koreantk, DBpia, PubMed, Cochrane, EMBASE, Medline, China National Knowledge Infrastructure [CNKI], Jstage) to find randomized-controlled clinical trials (RCTs) that used electro-acupuncture for sciatica. Efficacy rate and visual analogue scale (VAS) were mainly analyzed as a main evaluation criteria. Results Among 583 articles that were searched, 24 RCTs were finally selected and 18 RCTs were statistically analyzed. Electro-acupuncture was more effective than acupuncture in terms of efficacy rate (p<0.00001) and VAS (p<0.00001). Also, Electroacupuncture was more effective than western medication in terms of efficacy rate (p= 0.0005). However, the effectiveness of electro-acupuncture was not identified compared to physical therapy (p=0.42). Electro-acupuncture significantly improved efficacy rate when combined with physical therapy than physical therapy alone (p<0.0001). In addition, electro-acupuncture plus Chuna manual therapy compared to Chuna manual therapy alone showed positive results for efficacy rate (p=0.05) and VAS (p <0.0001). Conclusions Based on results, the effectiveness of electro-acupuncture for sciatica was identified. However, this study has limitations because the RCTs included in this study were small in number and published in a particular region. Although this study could be a groundwork for well designed research for sciatica. (J Korean Med Rehabil 2022;32(2):105-121)

족저근막염의 수기요법에 대한 문헌 연구 보고

박인화 ( In-hwa Park ),차윤엽 ( Yun-yeop Cha ),김민정 ( Min-jeong Kim ),허인 ( In Heo ),김병준 ( Byung-jun Kim ) 한방재활의학과학회 2024 한방재활의학과학회지 Vol.34 No.3

Objectives This study aims to analyze the effectiveness of manual therapy for the treatment of plantar fasciitis by reviewing existing randomized controlled trials. Specifically, it seeks to identify various manual therapy techniques and evaluate their applicability in clinical settings. Methods The study reviewed literature from six databases (PubMed, the Cochrane Library, China National Knowledge Infrastructure, ScienceON, Research Information Sharing Service, Korean studies Information Service System) up to April 2024. Studies were selected based on criteria including randomized controlled trials involving manual therapy for plantar fasciitis. Results An analysis of ten studies involving 714 patients revealed the use of techniques such as joint mobilization, muscle relaxation, and pressure point techniques. Manual therapy was found to be more effective in reducing pain than both extracorporeal shock wave therapy and routine physical therapy alone. However, caution is needed in generalizing these results due to the limited number of studies analyzed. No significant adverse effects were reported. Conclusions Manual therapy demonstrates potential as an effective treatment for plantar fasciitis, offering benefits in pain management and functional recovery. However, further high-quality randomized controlled trials are necessary to strengthen the clinical evidence and establish standardized treatment protocols. (J Korean Med Rehabil 2024;34(3):53-63)