Highly mesoporous activated carbon fibers using high density polyethylene precursor with a multi-step stabilization technique for automobile carbon canister

Jeong-Rae Ahn,Hye-Min Lee,Byung-Joo Kim 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.128 No.-

In this study, activated carbon fibers (ACFs) for automobile carbon canisters were produced usinghigh-density polyethylene (HDPE) fibers treated with a multistep stabilization process as the precursor. The stabilization of the HDPE fibers involved the following sequential steps: (1) electron beamirradiation, (2) mild sulfonation, and (3) dry oxidation. The stabilized fibers were carbonized at 900℃in a nitrogen atmosphere. The carbonized fibers were activated at 900℃ in a water–vapor atmospherefrom 30-60 min. The textural properties of the activated carbon fibers were determined using N2/77 Kadsorption–desorption isotherms. The specific surface area ranged from 1090 to 1980 m2/g, and the totalpore volume ranged from 0.56 to 1.11 cm3/g. The specific surface area, micropore volume, and mesoporevolume increased with increasing activation time. The fractions of micropores and mesopores were similaracross all conditions, whereas the yield decreased gradually until 50 min, and then exhibited a sharpdecline at 60 min. The butane working capacity increased as much as 56.24% as the increase in activationtime. This can be attributed to the increase in butane activity owing to the increase in micropore volume,along with a decrease in butane resistivity caused by the increase in mesopore volume at a specificdiameter.

허혈 유사 조건이 심방근의 활동전위 특성에 미치는 영향

김재하,주정민,조용범,신동호,안병희,주신배,김상형 대한순환기학회 1999 Korean Circulation Journal Vol.29 No.11

직접 검화법을 이용한 조제분유의 콜레스테롤 분석법 개발

김진만,박정민,윤태형,임동길,윤창용,정자영,정인식,곽병만,안장혁,Kim, Jin-Man,Park, Jung-Min,Yoon, Tae-Hyung,Leem, Dong-Gil,Yoon, Chang-Yong,Jeong, Ja-Young,Jeong, In-Seek,Kwak, Byung-Man,Ahn, Jang-Hyuk 한국축산식품학회 2011 한국축산식품학회지 Vol.31 No.6

An improved cholesterol analysis method was developed for powdered infant formula by gas chromatographic separation after liquid-liquid extraction and partition. In the official Korea Food Standard method for cholesterol analysis, the water phase and solvent phase were not well separated in the case of emulsified foods such as powdered infant formulas and baby foods. For the rapid and simple sample preparation method, an optimized direct saponification condition was established for heating temperature, heating time, and KOH concentration. From the results, the optimum conditions were as follows: heating temperature $90^{\circ}C$, heating time 60 min, and 16 M KOH 10 mL for a 2 g infant formula sample; improved separation condition for gas chromatography was as follows: the initial oven condition was $250^{\circ}C$ for 25 min, the oven temperature was increased to $290^{\circ}C$ by $10^{\circ}C$/min ratio, and finally the oven temperature remained at $290^{\circ}C$for 9 min. The developed method could be implemented for the study of cholesterol, providing the advantages of reduced inspection time and cost in emulsified foods such as infant formula.

자동차 폐촉매의 재활용을 위한 재생방법에 관한 연구

안호근,최병민,김병훈 順天大學校 1999 論文集 Vol.18 No.1

The recovery of the platinum group metals on the spent automotive catalysts is economically very important because of their high value and stable supply, but the spent autocatalysts still keep the inherent oxidation activity. The regeneration method was studied by treating with various acid solutions and/or air stream, the regenerated activity was investigated in the ethylene oxidation in a flow reactor. The oxidation activity showed maximum at 0.01vol% HNO₃solution, and was decreased with increasing the HNO₃concentration because the active metals or supports were dissolved into acid solution. Also, the activity was enhanced with increasing the air treatment temperature, and decreased at higher temperature than 300℃. The maximum activity was obtained at 300℃. Therefore, the oxidation activity of the spent autocatalysis could be effectively regenerated by the treatment of nitric acid solution and air stream.

2 CASES OF RABBIT SYNDROME : 토끼증후군 2례

민병근,이창화,안준호,천두욱,김헌수 울산대학교 의과대학 1994 울산의대학술지 Vol.3 No.2

The application of neuroleptics to schizophrenic and other psychotic patients in the early 1950's led to the therapeutic revolution into the psychiatry, on the other hand neuroleptic-related adverse effects did frequently occur. The authors experienced 2 cases of rabbit syndrome producing by rare complication of neuroleptic medication. Two cases were examined for the rabbit syndrome by the description of Villeneuve(1972) and Sovner and DiMascio(1977). The reciprocal coordination test and the finger-tapping technique to worsen the symptoms also were applied to two patients. The authors emphasized two issues of rabbit syndrome as follows. First, though the literature search showed that the majority of patients presented with rabbit syndrome which is usually seen after a prolonged exposure to neuroleptic medication with the more potency in the middle or elderly aged are over 45 years old, we suggest that this syndrome might be linked to the younger age factor and the low potency thioridazine in our patient. Second, the rabbit syndrome is in the importance of the clinical practice because of being readily reversible with antiparkinsonian agents or anticholinergic drugs. In addition, recognizing this condition and differentiating it from tardive dyskinesia helps in the choice of the proper treatment of orofacial disorders following neuroleptic medication for the long time.

소뇌출혈후 신경인성방광으로 배뇨장애를 주소로 한 환자 치험 1例

안정조,최영,조현경,임승민,김민상,오병렬,유병찬,설인찬 대전대학교 한방병원 2002 惠和醫學 Vol.11 No.1

In patients with Cerebral vascular accident, Voiding Dysfunction is very usual, but if with no improvement for a long time, it can cause many complexed-problems as urinarytract injury, infection or inflamation and patients suffering from pain, inconvenience and anxiety. In this case 58-year-old female with Voiding Dysfunction with Neurogenic Bladder after Cerebellum Hemorrhage, for 6 monts there was no interval change on symptom, We prescribed appropeiate herbal medication, and perform acupuncture and moxa. 5 days later after admission in Taejeon Oriental Hospital, The patien was able to have self-voiding and gradually improved. So we report it for the better treatment.

초자체절제술 후 전방깊이의 변화에 관한 실험적 연구

안병헌,민병무,박종문 충남대학교 의과대학 지역사회의학연구소 1984 충남의대잡지 Vol.11 No.2

The depth of the anterior chamber decreases with aging. Though the increase in the volume "of the lens with aging is a main influential factor to affect the anterior chamber depth, other unknown factors also work. In human the vitreous occupies about 2/3 of the intraocular volume and is confinded within the rigid scleral shell posteriorly. If there were some changes in the volume of the vitreous, these would result in the displacement of the lens and the iris to change the depth of the anterior chamber directly. We performed vitrectomy in 9 rabbits through the peripheral rerina and observed change in the anterior chamber depth. Slit lamp photography was used to measure the anterior chamber depth. To photograph the identical portion of the anterior chamber consecutively, argon laser photocoaglation was applied on the midperipheral iris at 12 and 6 o'clock positions as the Rlandmarks. We measured and compared the depth of anterior chamber image of the positive film with an aid of micrometer attached to light microscope. The measurement was not real depth of the anterior chamber but that of photographic image. Before vitrectomy the mean depth of the anterior chamber was 2.831±0.111mm. At the postvitrectomy 3rd day and the 1st week, the depth was 2.903±0.123 mm and 2.906±0.092 mm respectively. The depth of the anterior chamber became deeper significantly b t-test (5% significance level). But at the 2nd week, the 4th week and 8th week, the mean of the measurements was 2.885±0.083mm, 2.839±0.096mm, and 2.866±0.113mm respectively. These indicated deeper anterior chamber than those of previtrectomy rabbits, but the results were not significant by t-test. The mean number of scales of Goldmann applanation tonometry before the operation was II. The scale readings were 7 at the postoperative 3rd day, 8 at the 1st week and 9 at the 4th week all, 9 at the 8 th week.

LEED를 이용한 Co/Cu(001) 초박막의 구조 연구

閔恒基,安秉男 弘益大學校 科學技術硏究所 1998 科學技術硏究論文集 Vol.9 No.1

We studied the growth mode and stoichiometry of ultrathin Co film on Cu(001) single crystal surface by Auger electron spectroscopy and dynamin LEED analysis. I/V characteristics of LEED spot of ultrathin Co/Cu(001) system were obtained by video LEED system and analized by tensor LEED program and applied ATA (average t-matrix approximation). The structure and compositional variation as a function of temperature were traced. We found that a significant amount of Cu atom was segregated from the substrate to the surface of the Co film at room temperature.

호흡곤란과 주시 유발 눈떨림을 동반한 비전형적 밀러-피셔 증후군 1례

안성민,김호창,정보영,서억수,정병욱 동국대학교 의학연구소 2009 東國醫學 Vol.15 No.2

We report a case of atypical Miller-Fisher syndrome with respiratory distress and gaze evoked nystagmus. A 70 year-old man who has a hepatocellular carcinoma with metastasis to the lung was referred complaining of acute onset diplopia. He showed a 15 prism diopter esotropia, gaze evoked nystagmus at lateral gaze, and limitation of the extraocular movement at any directional gaze. And deep tendon reflexes were absent. The results of brain MRI and cerebrospinal fluid analysis were normal, so we can differentiate an atypical Miller-Fisher syndrome with the Guillain-Barre syndrome and other CNS problems. After 2 weeks, diplopia, nystagmus, and extraocular movement were improved spontaneously, but deep tendon reflexes were still absent. The differential diagnosis of the Miller-Fisher syndrome is important because it can be recovered spontaneously. We can diagnose a case of atypical Miller-Fisher syndrome which represented normal findings of brain MRI, CSF analysis. 호흡곤란과 주시유발 눈떨림을 동반한 비전형적인 밀러-피셔 증후군 (atypical Miller-Fisher syndrome) 1례를 보고한다. 70세 남자환자가 간세포암과 폐전이로 내과 입원중에 갑자기 생긴 복시를 주소로 의뢰되었다. 제 1안위에서 15 PD의 내사시가 있었고, 측면주시시 주시 유발 눈떨림이 있었다. 모든 주시방향에서 눈운동 장애가 있었으며 사지의 심부건반사가 없었다. 두부 MRI및 뇌척수액검사에서 이상이 확인되지 않아, 중추신경계의 이상 및 길랑-바레 증후군(Guillain-Barre syndrome)과 감별하여 비전형적 밀러-피셔 증후군으로 진단하였다. 2주 후 경과관찰에서 복시와 주시유발 눈떨림, 안구운동제한에 호전이 있었으며 , 심부건반사의 소실은 회복되지 않았다. 밀러-피셔 증후군은 대개가 치료없이 회복되어서 다른 질환과의 감별이 중요하다. 저자들은 두부 MRI및 뇌척수액검사에서 정상 소견을 확인하고 비전형적 밀러-피셔 증후군을 감별 진단할 수 있었기에 이를 보고한다.

Argon Laser 우각조사술을 시행한 녹내장환자의 관찰

安炳憲,閔丙武 충남대학교 의과대학 지역사회의학연구소 1985 충남의대잡지 Vol.12 No.1

Eleven phakic eyes with uncontrolled open angle glaucoma under went 180 degree argon laser trabeculoplasty (ALT) to the anterior portion of the trabecular meshwork. The mean rate of pressure reduction was 17.25% and success rate was 72.72%. The ALT caused serious complications in none of the 11 eyes. Failure was seen in secondary open angle glaucoma to angle recess and uveitis. The patients over 40 years had a success rate that was better than that in patients below 40 years. Additional ALT (2 eyes) was not effective.