編絲의 굵기와 編機 Gauge의 關係가 編物의 品質에 미치는 影響

尹致先 全北大學校 1968 論文集 Vol.10 No.-

1. When we used the plain circular knitting machine of 22 ndls/in gauge to knitting, we may use 23 cotton yarn. 2. The cotton counts which suit gauge of plain circular knitting machine are got from formula N=1/K^2ㆍG^2 (K=4.2). 3. The angle of wales were steep in proportion to Hungry work. 4. When knitted fabrics which resemble to idial knitted fabrics were knit by fine yarn in comparison with gauge, wales of needle and sinker were irregular.

안와-관골골절 환자에서 안와하 접근법의 유용성

윤치선,양호직,김종환 대한두개안면성형외과학회 2009 Archives of Craniofacial Surgery Vol.10 No.1

Purpose: There are various approaches for open reduction surgery for orbitozygomatic fractures. After the incisions are performed, patients might have various complications. In this point of view, we conducted a retrospective study of the usability of infraorbital incision on elderly patients, generally more vulnerable to scleral show and ectropion. Methods: In this study, 20 patients who are relatively more vulnerable to scleral show and ectropion through snap-back test having infraorbital incision were reviewed. We monitored the duration of the surgery, and complications resulted from the incision. We evaluated the scars with the researcher's observations and with the patient's level of satisfaction on a scale of 1 to 5. Results: On average, 5 minutes was spent between the skin incision and the fracture exposure. No case of scleral show and ectropion occurred. One year follow-up observation revealed 4 cases of visible scars, 9 cases of barely visible scars, and 7 cases of invisible scars. The subjective satisfaction level of the patients' scar is an average of 4.0. Conclusion: Infraorbital incision has many advantages. First, it can reduce the complications such as scleral show and ectropion. Second, it can shorten the operation time. Third, it can diminish incision-related scars.

編成張力이 編地의 品質에 미치는 影響

李達雨,尹致先 全北大學校 1972 論文集 Vol.14 No.-

In this study, the fabrics knitted under the various kinds of tension were experimented. It is resulted in as follows; 1. The knitting machine, Whose gauge is 7, can be operated without any difficulty in knitting fabrics out of the blended yarn of 4's (medium count) (In N=G^2/K^2, equation representing relation between the gauge of knitting machine and knitting performance, the value suitable to 「K」 is 4.5 <English system cotton count>) 2. The knitting tension that can be knitted without any difficulty is from 20g to 80g. 3. The knitting tension suitable to knitting fabric with good quality is between 40g and 609. 4. The quality of knitted fabric is not greatly affected by the change in knitting tension of 100g and over.

各種 原絲에 依한 編地의 性能에 對한 硏究

李達雨,尹致先 전북대학교 공업기술연구소 1973 工學硏究 Vol.1 No.-

The author has studied how laundering agents affect various kinds of kinitted goods in dimensional stability and strength etc. The results of study may be summarized as follows. 1) Neutral lauudering agent method or dry cleaning method is commended to be used for wool goods and wool and nylon blended goods. (because the methods don't cause undue tendering) 2) When dry-cleaning methods to be used, knitted fabrics have better dimensional stability. 3) Cotton goods is unsuitable to be used for raliored kint. (because of serious change in shrinkage and less stiffness) 4) In various treatments. knitted fakrics with plain stitch contract 3 to 8 percentage in both directions, and knitted fabrics with rib wtitch contract 4 to 12 percentage in gorizontal direction(wale) and increase 6 to 15 percentage in vertical direction(course).

Poly-Acryl 纖維 및 羊毛混紡絲에 依한 編織物의 組織과 性能에 關한 硏究

金泳錫,尹致先 全北大學校 1968 論文集 Vol.10 No.-

The purpose of this study are in testing and interpreting the characteristics of knitted fabrics, made of poly acrylic fibre-wool blended yarn. The results obtained in the experiment may be summarized as follows. 1. Rib stitch is superior to plain stitch in bursting and abrasion strength, when they are knitted on same conditions. 2. Plain stitch is superior to rib stitch in softness, but inferior in stability and tightness. From the above facts, rib stitch is suitable for outer wear and plain stitch is adequate for under wear.

Poly-N-acetyl-glucosamine이 당뇨병 쥐에서 창상치료에 미치는 영향

양호직,윤치선 대한성형외과학회 2008 Archives of Plastic Surgery Vol.35 No.2

Purpose: Poly-N-acetyl glucosamine(PGlcNAc) nanofiber-based materials, produced by a marine microalga, have been characterized as effective hemostatic and angiogenic agents. The similarity between PGlcNAc patch and the natural extracellular matrix allows it to support new healthy tissue growth in an injured area and to encourage fluid absorption. In this study, we hypothesized that a poly-N-acetyl glucosamine fiber patch(PGlcNAc patch) may enhance wound healing in the db/db mouse. Methods: PGlcNAc patches were applied on one square centimeter, full-thickness, skin wounds in the db/db mouse model. Wounds(n=15 per group) were dressed with a PGlcNAc nanofiber patch for 1 hour(1h), 24 hours(24h) or left untreated(NT). After the application time, patches were removed and wounds were allowed to heal spontaneously. The rate of wound closure was evaluated by digital analysis of unclosed wound area in course of time. At day 10, wounds(n=7 per group) were harvested and quantified with immunohistochemical markers of proliferation(Ki-67) and vascularization (platelet endothelial cell adhesion molecule, PECAM-1). Results: Wounds dressed with PGlcNAc patches for 1 hour closed faster than control wounds, reaching 90% closure in 16.6 days, nine days faster than untreated wounds. Granulation tissue showed higher levels of proliferation and vascularization following 1h treatment than the 24h and NT groups. In addition to its hemostatic properties, the PGlcNAc material also appears to accelerate wound closure in healing-impaired genetically diabetic mice. Conclusion: This material, with its combination of hemostatic and wound healing properties, has the potential to be effective agent for the treatment of complicated wounds.

羊毛 化纖 混紡으로 된 메리야스용사의 撚係數에 關한 硏究

金泳錫,尹致先 全北大學校 1970 論文集 Vol.12 No.-

하지의 작거나 중등도의 결손 부위 재건을 위한 얕은엉덩휘돌이동맥 천공지 유리 피판술

김규남,정우식,홍준표,윤치선,Kim, Kyu Nam,Jeong, Woo Shik,Hong, Joon Pio,Yoon, Chi Seon 대한미세수술학회 2013 Archives of reconstructive microsurgery Vol.22 No.1

Purpose: For reconstruction of lower extremity defects, various flaps can be used and the appropriate flap must be selected and applied according to the size of the defect. In particular, in cases where the defect size is small to moderate, thinner or smaller volume flaps are useful. The authors performed reconstruction of small to moderate defects on the lower extremities using superficial circumflex iliac artery perforator free flaps and are reporting the results. Materials and Methods: Fifteen patients underwent reconstruction of defects on lower extremity areas using superficial circumflex iliac artery perforator free flaps from July 2011 to July 2012 at this hospital. The flaps were elevated from above the deep fat layer, and, in all cases, the vessel diameter of the flaps was less than 1mm, with the exception of superficial vein that accompanied it. Results: The mean follow up period was 4.46 months, and, despite a partial loss in the flap in two cases, there were no total losses. All donor sites were closed with primary closure, and there was no occurrence of complications, such as hematomas, seromas, or lymphorrheas. The patients were highly satisfied with the donor site scar since it could be masked by underwear. Conclusion: Compared to other flaps, superficial circumflex iliac artery perforator free flaps are thinner in thickness and smaller in volume, which results in a more natural contour of the recipient site after the operation. In addition, since the flap can be elevated from supra-deep fat layer, the operation time can be shortened, and lymphorrhea can be prevented, which in turn lessens donor-site morbidity.

초미세수술을 이용한 하지재건의 기술적 고찰

이희종,김성찬,김규남,윤치선,홍준표,Lee, Hee Jong,Kim, Sung Chan,Kim, Kyu Nam,Yoon, Chi Seon,Hong, Joon Pio 대한미세수술학회 2013 Archives of reconstructive microsurgery Vol.22 No.1

Purpose: The concept and development of perforator free flaps have led to significant advances in microsurgery. Ongoing developments in perforator free flap surgery are aimed at reducing complications and improving surgical outcomes. The aim of this study was to evaluate the effectiveness and application of supermicrosurgery in free flap surgery. Materials and Methods: A total of 267 patients with soft tissue defects of the lower extremity due to various etiologies from January, 2007 to January, 2013. The patients received either an anterolateral thigh free flap (n=83), a superficial circumflex iliac artery free flap (n=152), an upper medial thigh free flap (n=19), or a superior gluteal artery perforator free flap (n=13). Microanastomosis was performed using a perforator-to-perforator technique, either end-to-end or end-to-side. Results: The mean postoperative follow up period was eight months (range: one to 16 months) and flap loss occurred in 11 cases out of 267. All cases of flap loss occurred within two weeks of surgery due to either arterial insufficiency (n=5) or venous congestion (n=6). Conclusion: Supermicrosurgery enables the selection of the most efficient perforator for microanastomosis at the defect site. It also reduces the time required for dissection of recipient vessels, and reduces the possibility of injury to major vessels. Microsurgery using a vessel of less than 1 mm has been reported to increase the risk of flap failure; however, using the most advanced surgical tools and developing experience in the technique can produce success rates similar to those found in the literature.

Effects of Particulate Matter on Wound Healing: An In Vivo Study

Lee Hye Mi,Kim Choon Soo,나영천,윤치선,Jong Hwan Kim,Seon Sik Yun,Park Ji Hye 대한창상학회 2022 Journal of Wound Management and Research Vol.18 No.1

Background: Particulate matter (PM) is known to increase the risk of diseases in major organs and PM may also slow the complex process of wound healing. We investigated the effect of PM on wound healing in vivo. Methods: Twelve 10-week-old Sprague-Dawley male rats were punctured with three 8 mm-diameter holes each in the skin on their backs. The holes were divided into three groups according to treatment: PM 50 µg/mL (group A), PM 100 µg/mL (group B) and saline (control). For histologic analysis, three rats were sacrificed on each of the 1st, 3rd, 7th, and 28th days, and a total of 36 samples were collected. Inflammatory cell infiltration and neovascularization were evaluated for comparison among groups. Results: Inflammation increased in groups A and B on day 1, but no significance was observed. On the 28th day, increased inflammation was observed in groups A and B compared to the control group, with significant difference. Angiogenesis increased in groups A and B compared to the control group on day 1, but no significance was observed. On the 3rd day, there was a decrease in group B, with statistical significance. On day 28, it was observed that angiogenesis significantly increased in group B compared to the control group. Conclusion: Inflammation increased in the PM groups compared with the control group and angiogenesis decreased, then slowly increased in the PM groups compared with the control group. Our findings suggest that PM increases inflammation and delays angiogenesis in the wound healing process.