• Title/Summary/Keyword: Grafting

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HANDLING MECHANISM IN GRAFTING ROBOT

  • Kajikawa, T.;Nishiura, Y.
    • Proceedings of the Korean Society for Agricultural Machinery Conference
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    • 2000.11b
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    • pp.313-317
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    • 2000
  • In this research, a grafting robot with plug in method is used. Plug in method is a method that uses a tapered axis for scion and a tapered hole for stock as processing style of conjugation parts. In the case of handling a grafting seedling, gripping a stem is doing with simple mechanisms of devising to reduce damages to stems. For example, providing cushions between gripper and stem, and fitting a gripper to a stem. Both scions and stocks need cutting, but there is bigger influence for scions than stocks, so problems of cutting scions and special qualities of grippers are necessary to investigate.

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Melt-Grafting of Maleimides Having Hindered Phenol Group onto Polypropylene

  • Kim, Taek-Hyeon;Lee, Nam-Gun
    • Bulletin of the Korean Chemical Society
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    • v.24 no.12
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    • pp.1809-1813
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    • 2003
  • Monomeric antioxidant 1 was prepared by the reaction of 3,5-di-tert-butyl-4-hydroxybenzyl alcohol with N-[4-(chlorocarbonyl)phenyl]maleimide in the presence of imidazole. Monomeric antioxidant 2, bearing carbamate group, was synthesized from the reaction of 3,5-di-tert-butyl-4-hydroxybenzyl alcohol and azidomaleimide. Antioxidant 3 was prepared by the reaction of N-(4-hydroxyphenyl)maleimide and 3-(3,5-ditert-butyl-4-hydroxyphenyl) propionic chloride in the presence of triethylamine. These reactive antioxidants were grafted onto polypropylene (PP) by melt-processing with free radical initiators in a mini-max moulder. From the infrared spectra of the grafted PP, it was found that the monomeric antioxidants were grafted onto PP. IR spectroscopic methods were used for the quantitative determination of the extent of grafting of monomeric antioxidant. To optimize the reaction conditions, the influences of the concentration of DCP, monomeric antioxidant, reaction time and temperature on the extent of grafting were studied.

Ultrasound-guided Nerve Block for Skin Grafting on Large Diabetic Ulcer of Foot and Leg: A Technical Report (광범위 당뇨병성 족부 및 하퇴부 궤양의 피부이식술에 사용된 초음파 유도 신경 차단: 술기 보고)

  • Song, Jae-Hwang;Kang, Chan;Hwang, Deuk-Soo;Hwang, Jung-Mo
    • Journal of Korean Foot and Ankle Society
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    • v.18 no.3
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    • pp.133-136
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    • 2014
  • Skin grafting is often required for diabetic ulcerative foot lesions. In skin grafting, effective regional or local anesthesia into the donor and recipient areas plays a significant role in continuous control of pain. We report on a technique of ultrasound-guided nerve block on the femoral, sciatic, and lateral femoral cutaneous nerves in large split-thickness skin grafting for ulcer of the foot and leg.

Preparation and Characterization of Ionic Permselective Membrane by Radiation Grafting for Vanadium Redox Flow Battery (방사선을 이용한 바나듐 레독스 흐름전지용 이온 투과선택성 분리막의 제조 및 특성 평가)

  • Sohn, Joon-Yong;Song, Ju-Myung;Shin, Junhwa
    • Journal of Radiation Industry
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    • v.7 no.1
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    • pp.61-67
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    • 2013
  • In this study, we developed ionic permselective membrane as a core material of redox flow battery using radiation grafting method. Two ionic permselective membranes, ETFE-g-PSSA and ETFE-g-PVBSA were prepared by radiation grafting with styrene and VBC followed by sulfonation, respectively. We confirmed that the prepared membranes were successfully prepared via FT-IR. The prepared ionic permselcetive membranes were characterized and the performance of the membranes were evaluated as ionic permselective membranes for vanadium redox flow battery.

Radiation-Induced Grafting of Acrylic Acid onto Cellulose : II. Effects of Multi-Functional Monomer and Acid on the Grafting (셀룰로오스에 아크릴산의 방사선 그라프트 반응: II. 다관능성 단량체와 산의 첨가 효과)

  • Kwon, Oh Hyun;Nho, Young Chang;Lee, Young Moo
    • Applied Chemistry for Engineering
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    • v.9 no.3
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    • pp.348-354
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    • 1998
  • Cellulose grafted with acrylic acid(AAc) was prepared by radiation grafting technique. The effects of reaction temperature. reaction time, monomer concentration, and the crosslinkers on the AAc grafting reaction on cellulose were examined. The amount of AAc grafted on the cellulose reached maximum at the concentration of 0.75vol% difunctional crosslinker and 1.0vol% trifunctional crosslinker, respectively. In the presence of acid, the amount of AAc grafted on the cellulose was decreased when reaction solution contains difunctional crosslinker, while that was increased when reaction solution contains trifunctional crosslinker. In the grafting reaction of cellulose with AAc and TMETA, mixture containing ferrous sulfate and acid enhanced further AAc grafting yield than mixture containing ferrous sulfate only.

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The Result of Autologous Osteochondral Grafting for the Osteochondral Lesion of the Talus (거골의 골연골 병변에 대한 자가 골연골 이식술의 결과)

  • Ahn, Young-Joon;Hahn, Sung-Ho;Yang, Bo-Kyu;Yi, Seung-Rim;Yoo, Jae-Ho;Chung, Shun-Wook;Bin, Sung-Woo;Zoo, Min-Hong;Kim, Seong-Wan
    • Journal of Korean Foot and Ankle Society
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    • v.10 no.1
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    • pp.48-55
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    • 2006
  • Purpose: The purpose of this study is to assess the results of the autologous osteochondral grafting for the osteochondral lesion of the talus. Materials and Methods: This study included 21 patient who had been treated with the open autologous osteochondral grafting between December, 1999 and December 2003. We treated the patients with autologous osteochondral grafting method who had the lesion of stage II or medial lesion of stage III without improvement for at least 6 months, the medial lesion of stage IV, the lateral lesion of stage III, IV by Berndt and Harty's classification or who had not improved with previous operation. The average duration of follow up was 26 (12-56) months. 6 patients had been treated with the previous operation that 3 patients with drilling, 3 patients excision, curettage and drilling. Results: The average AOFAS Ankle/Hindfoot score was 92.7 points and no patient had a limitation of the daily activities due to pain or abnormal function. Postoperative radiography showed good joint congruency and postoperative MRI good incorporation of the graft. The average Lysholm knee score was 96 points and only two patients had mild knee pain during severe exertion. Conclusion: The autologous osteochondral grafting is the useful operative method when the lesion is advanced stage or when previous operative treatment has failed.

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Treatment of Fibrous Dysplasia (섬유성 골 이형성증의 치료)

  • Kim, Tai-Seuug;Yang, Mun-Seung;Cho, Jae-Lim
    • The Journal of the Korean bone and joint tumor society
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    • v.2 no.1
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    • pp.78-87
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    • 1996
  • The results of treatment of eighteen lesions of fibrous dysplasia which of them seventeen lesions were treated with surgery were reviewed at the Department of Orthopedic Surgery, College of Medicine, Hanyang University Hospital. We studied to evaluate the functional clinical results and the recurrence according to the type of disease, grafted bone, methods of treatment and location of lesion. We treated sixteen patients(five males and eleven females) and their mean age was 22.6 years. There was no association with skin pigmentation or dysfunction of endocrine system. Twelve patients had a monostotic pattern and four patients had a polyostotic pattern. Twelve lesions were treated with curettage and bone grafting and four lesions in the proximal femur were treated by internal fixation with curettage and bone grafting. One lesion was treated by en-bloc resection. There were eleven satisfactory results in twelve monostotic lesions and there were four satisfactory results in five polyostotic lesions, but the recurrence were four cases, respectively. The two unsatisfactory results were seen in two patients treated by autografting, but there were three recurrence of four lesions in autografting only, one of five in autografting and allografting, four of eight in allgrafting or xenografting. Four of six lesions in upper extremity were recurred after curettage and bone grafting and five of them showed satisfactory results. In pelvic and lower extremity lesions, the recurrence were occurred in two lesions after curettage and bone grafting and in two lesions after internal fixation and bone grafting. The recurrence does not always provide an unsatisfactory functional results and the recurrence showed higher rate in radiologic pattern of ground glass appearance with-out marginal sclerotic rim, but the recurrence according to grafted bone showed similar rates. Curettage and bone grafting is adequate for a symptomatic lesion and firm internal fixation is needed for a lesion in proximal femur. In use of grafted bone, xenograft or allograft may be preferable to autograft because of the disadvantage of autografting like a increased blood loss, prolonged operation times, etc.

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Inlay Grafting for the Treatment of the Posterior Comminuted Fracture of Medial Orbital Wall (Inlay법을 이용한 안와 내벽 골절의 교정)

  • Lim, Jong-Hyo;Kim, Tae-Gon;Lee, Jun-Ho;Kim, Yong-Ha
    • Archives of Craniofacial Surgery
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    • v.10 no.1
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    • pp.55-60
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    • 2009
  • Purpose: For blowout fracture of the medial orbital wall, the goals of treatment are complete reduction of the herniated soft tissue and anatomic reconstruction of the wall without surgical complications. Surgeons frequently worry about damage to the optic nerve from the dissection, when the part over the posterior ethmoidal foramen was fractured. The authors performed small incision and inlay grafting for reconstruction of medial orbital wall fracture. Methods: Between January 2007 and April 2008, 15 out of 32 patients were included in an analysing the outcome of corrected medial orbital wall fracture. In 15 patients of posterior comminuted fracture of medial orbital wall, insertion of porous polyethylene($Medpor^{(R)}$ channel implant, Porex, USA) to ethmoidal sinus was performed in multiple layer, through the transconjunctival approach (inlay grafting). Results: In all cases, the orbital bone volume was reconstructed in its normal anatomical position. The associated ocular problems disappeared except for mild enophthalmos in 2 patients and there were no surgical complications associated with inlay grafting. Conclusion: The advantage of inlay grafting include anatomical reconstruction of the orbital wall; the avoidance of optic nerve injury; the simplicity of the procedure; and consequently, the absence of surgery-related complications. This technique is presented as one of the preferred treatments for posterior comminuted fracture of medial orbital wall.