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Don-hee Park - One of the best experts on this subject based on the ideXlab platform.
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Rapeseed-straw enzymatic digestibility enhancement by Sodium Hydroxide treatment under ultrasound irradiation
Bioprocess and Biosystems Engineering, 2013Co-Authors: Kyeong Eop Kang, Gwi-taek Jeong, Don-hee ParkAbstract:In this study, we carried out Sodium Hydroxide and sonication pretreatments of rapeseed straw ( Brassica napus ) to obtain monosugar suitable for production of biofuels. To optimize the pretreatment conditions, we applied a statistical response-surface methodology. The optimal pretreatment conditions using Sodium Hydroxide under sonication irradiation were determined to be 75.0 °C, 7.0 % Sodium Hydroxide, and 6.8 h. For these conditions, we predicted 97.3 % enzymatic digestibility. In repeated experiments to validate the predicted value, 98.9 ± 0.3 % enzymatic digestibility was obtained, which was well within the range of the predicted model. Moreover, sonication irradiation was found to have a good effect on pretreatment in the lower temperature range and at all concentrations of Sodium Hydroxide. According to scanning electron microscopy images, the surface area and pore size of the pretreated rapeseed straw were modified by the Sodium Hydroxide pretreatment under sonication irradiation.
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Pretreatment of rapeseed straw by Sodium Hydroxide
Bioprocess and Biosystems Engineering, 2011Co-Authors: Kyeong Eop Kang, Gwi-taek Jeong, Don-hee ParkAbstract:Pretreatment method for rapeseed straw by Sodium Hydroxide was investigated for production of bioethanol and biobutanol. Various pretreatment parameters, including temperature, time, and Sodium Hydroxide concentration were optimized using a statistical method which is a central composite design of response surface methodology. In the case of Sodium Hydroxide pretreatment, optimal pretreatment conditions were found to be 7.9% Sodium Hydroxide concentration, 5.5 h of reaction time, and 68.4 °C of reaction temperature. The maximum glucose yield which can be recovered by enzymatic hydrolysis at the optimum conditions was 95.7% and the experimental result was 94.0 ± 4.8%. This experimental result was in agreement with the model prediction. An increase of surface area and pore size in pretreated rapeseed straw by Sodium Hydroxide pretreatment was observed by scanning electron microscope.
Kyeong Eop Kang - One of the best experts on this subject based on the ideXlab platform.
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Rapeseed-straw enzymatic digestibility enhancement by Sodium Hydroxide treatment under ultrasound irradiation
Bioprocess and Biosystems Engineering, 2013Co-Authors: Kyeong Eop Kang, Gwi-taek Jeong, Don-hee ParkAbstract:In this study, we carried out Sodium Hydroxide and sonication pretreatments of rapeseed straw ( Brassica napus ) to obtain monosugar suitable for production of biofuels. To optimize the pretreatment conditions, we applied a statistical response-surface methodology. The optimal pretreatment conditions using Sodium Hydroxide under sonication irradiation were determined to be 75.0 °C, 7.0 % Sodium Hydroxide, and 6.8 h. For these conditions, we predicted 97.3 % enzymatic digestibility. In repeated experiments to validate the predicted value, 98.9 ± 0.3 % enzymatic digestibility was obtained, which was well within the range of the predicted model. Moreover, sonication irradiation was found to have a good effect on pretreatment in the lower temperature range and at all concentrations of Sodium Hydroxide. According to scanning electron microscopy images, the surface area and pore size of the pretreated rapeseed straw were modified by the Sodium Hydroxide pretreatment under sonication irradiation.
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Pretreatment of rapeseed straw by Sodium Hydroxide
Bioprocess and Biosystems Engineering, 2011Co-Authors: Kyeong Eop Kang, Gwi-taek Jeong, Don-hee ParkAbstract:Pretreatment method for rapeseed straw by Sodium Hydroxide was investigated for production of bioethanol and biobutanol. Various pretreatment parameters, including temperature, time, and Sodium Hydroxide concentration were optimized using a statistical method which is a central composite design of response surface methodology. In the case of Sodium Hydroxide pretreatment, optimal pretreatment conditions were found to be 7.9% Sodium Hydroxide concentration, 5.5 h of reaction time, and 68.4 °C of reaction temperature. The maximum glucose yield which can be recovered by enzymatic hydrolysis at the optimum conditions was 95.7% and the experimental result was 94.0 ± 4.8%. This experimental result was in agreement with the model prediction. An increase of surface area and pore size in pretreated rapeseed straw by Sodium Hydroxide pretreatment was observed by scanning electron microscope.
Erbak Gurgey - One of the best experts on this subject based on the ideXlab platform.
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comparison of phenol and Sodium Hydroxide chemical matricectomies for the treatment of ingrowing toenails
Dermatologic Surgery, 2007Co-Authors: Seher Bostanci, Pelin Kocyigit, Erbak GurgeyAbstract:OBJECTIVE Chemical matricectomy is performed mainly by two agents: phenol and Sodium Hydroxide. Both agents have excellent cure rates, but there are no data about the comparison of postoperative healing periods. This study was designed to compare the postoperative morbidity rates of Sodium Hydroxide and phenol matricectomies. MATERIALS AND METHODS Forty-six patients with 154 ingrowing nail sides were treated with either Sodium Hydroxide or phenol matricectomy. In the postoperative period, the patients were evaluated for the duration and severity of pain, drainage, and peripheral tissue destruction; complete healing periods; and overall success rates. RESULTS The incidence of pain was higher in the Sodium Hydroxide group on the first visit, on the second day, but all patients became pain-free after that. The incidence and duration of drainage and peripheral tissue destruction was significantly higher in the phenol group. The mean period for complete recovery was 10.8 days in the Sodium Hydroxide group, whereas it was 18.02 days in the phenol group. The overall success rates in the Sodium Hydroxide and phenol groups were found to be 95.1 and 95.8%, respectively. CONCLUSION Both Sodium Hydroxide and phenol are effective agents giving high success rates, but Sodium Hydroxide causes less postoperative morbidity and provides faster recovery.
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Chemical matricectomy with 10% Sodium Hydroxide for the treatment of ingrowing toenails.
Dermatologic Surgery, 2004Co-Authors: Esin Ozdemir, Seher Bostanci, Pelin Ekmekci, Erbak GurgeyAbstract:Background. In the last decades, phenol cauterization has been widely used with high success rates for the treatment of ingrowing toenails. However, unpredictable tissue damage and prolonged healing time are the disadvantages of this technique. Sodium Hydroxide is an alternative chemical agent that causes less tissue damage. Objective. In this study, long-term results and postoperative morbidity of two Sodium Hydroxide chemical matricectomy procedures carried out by different application times have been investigated. Methods. A total of 156 partial chemical matricectomy procedures were performed with 10% Sodium Hydroxide in 60 patients divided into two groups. The first group (80 nail sides) received a 2-minute application of Sodium Hydroxide, whereas the second group (76 nail sides) received a combination of curettage of the lateral matrix area and 1-minute application of Sodium Hydroxide. Postoperative pain, drainage, and tissue damage were evaluated 2 days after the operation and at three more visits with weekly intervals. Long-term success rates of the methods were evaluated on the 6th month and at a further visit with a mean time of 16.83±2.18 months (range, 13 to 20). Results. Partial matricectomy with 10% Sodium Hydroxide was found to be 100% successful in both of the groups (P>0.05). Postoperative pain and tissue damage were either absent or minimal in the great majority of the patients with no statistical difference between the two groups (P>0.05). On the 2nd day, more patients in the first group experienced mild drainage than the patients in the second group (P=0.001), but in the following control visits, this difference disappeared. Conclusion. Matricectomy with 10% Sodium Hydroxide, either applied for 2 minutes or 1 minute combined with curettage, is equally effective in the treatment of ingrowing toenails with high success rates and minimal postoperative morbidity.
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chemical matricectomy with 10 Sodium Hydroxide for the treatment of ingrowing toenails
Dermatologic Surgery, 2004Co-Authors: Esin Ozdemir, Seher Bostanci, Pelin Ekmekci, Erbak GurgeyAbstract:Background. In the last decades, phenol cauterization has been widely used with high success rates for the treatment of ingrowing toenails. However, unpredictable tissue damage and prolonged healing time are the disadvantages of this technique. Sodium Hydroxide is an alternative chemical agent that causes less tissue damage. Objective. In this study, long-term results and postoperative morbidity of two Sodium Hydroxide chemical matricectomy procedures carried out by different application times have been investigated. Methods. A total of 156 partial chemical matricectomy procedures were performed with 10% Sodium Hydroxide in 60 patients divided into two groups. The first group (80 nail sides) received a 2-minute application of Sodium Hydroxide, whereas the second group (76 nail sides) received a combination of curettage of the lateral matrix area and 1-minute application of Sodium Hydroxide. Postoperative pain, drainage, and tissue damage were evaluated 2 days after the operation and at three more visits with weekly intervals. Long-term success rates of the methods were evaluated on the 6th month and at a further visit with a mean time of 16.83±2.18 months (range, 13 to 20). Results. Partial matricectomy with 10% Sodium Hydroxide was found to be 100% successful in both of the groups (P>0.05). Postoperative pain and tissue damage were either absent or minimal in the great majority of the patients with no statistical difference between the two groups (P>0.05). On the 2nd day, more patients in the first group experienced mild drainage than the patients in the second group (P=0.001), but in the following control visits, this difference disappeared. Conclusion. Matricectomy with 10% Sodium Hydroxide, either applied for 2 minutes or 1 minute combined with curettage, is equally effective in the treatment of ingrowing toenails with high success rates and minimal postoperative morbidity.
Seher Bostanci - One of the best experts on this subject based on the ideXlab platform.
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Chemical matricectomy with Sodium Hydroxide: long-term follow-up results.
Dermatologic Surgery, 2014Co-Authors: Seher Bostanci, Pelin Kocyigit, Nehir Parlak, Hilayda Karakök GüngörAbstract:BACKGROUNDChemical matricectomy with Sodium Hydroxide is a method being used successfully in the treatment of ingrown toenail.OBJECTIVEIn this study, it was aimed to evaluate long-term recurrence rates after chemical matricectomy using Sodium Hydroxide application of different durations.MATERIALS AN
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Complications of Sodium Hydroxide chemical matrixectomy: nail dystrophy, allodynia, hyperalgesia.
Journal of the American Podiatric Medical Association, 2014Co-Authors: Seher Bostanci, Pelin Kocyigit, Hilayda Karakök Güngör, Nehir ParlakAbstract:Ingrown toenails are seen most commonly in young adults, and they can seriously affect daily life. Partial nail avulsion with chemical matrixectomy, generally by using either Sodium Hydroxide or phenol, is one of the most effective treatment methods. Known complications of phenol matrixectomy are unpredictable tissue damage, prolonged postoperative drainage, increased secondary infection rates, periostitis, and poor cosmetic results. To our knowledge, there have been no reports about the complications related to Sodium Hydroxide matrixectomy. Herein, we describe three patients who developed nail dystrophy, allodynia, and hyperalgesia after Sodium Hydroxide matrixectomy.
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comparison of phenol and Sodium Hydroxide chemical matricectomies for the treatment of ingrowing toenails
Dermatologic Surgery, 2007Co-Authors: Seher Bostanci, Pelin Kocyigit, Erbak GurgeyAbstract:OBJECTIVE Chemical matricectomy is performed mainly by two agents: phenol and Sodium Hydroxide. Both agents have excellent cure rates, but there are no data about the comparison of postoperative healing periods. This study was designed to compare the postoperative morbidity rates of Sodium Hydroxide and phenol matricectomies. MATERIALS AND METHODS Forty-six patients with 154 ingrowing nail sides were treated with either Sodium Hydroxide or phenol matricectomy. In the postoperative period, the patients were evaluated for the duration and severity of pain, drainage, and peripheral tissue destruction; complete healing periods; and overall success rates. RESULTS The incidence of pain was higher in the Sodium Hydroxide group on the first visit, on the second day, but all patients became pain-free after that. The incidence and duration of drainage and peripheral tissue destruction was significantly higher in the phenol group. The mean period for complete recovery was 10.8 days in the Sodium Hydroxide group, whereas it was 18.02 days in the phenol group. The overall success rates in the Sodium Hydroxide and phenol groups were found to be 95.1 and 95.8%, respectively. CONCLUSION Both Sodium Hydroxide and phenol are effective agents giving high success rates, but Sodium Hydroxide causes less postoperative morbidity and provides faster recovery.
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Chemical matricectomy with 10% Sodium Hydroxide for the treatment of ingrowing toenails.
Dermatologic Surgery, 2004Co-Authors: Esin Ozdemir, Seher Bostanci, Pelin Ekmekci, Erbak GurgeyAbstract:Background. In the last decades, phenol cauterization has been widely used with high success rates for the treatment of ingrowing toenails. However, unpredictable tissue damage and prolonged healing time are the disadvantages of this technique. Sodium Hydroxide is an alternative chemical agent that causes less tissue damage. Objective. In this study, long-term results and postoperative morbidity of two Sodium Hydroxide chemical matricectomy procedures carried out by different application times have been investigated. Methods. A total of 156 partial chemical matricectomy procedures were performed with 10% Sodium Hydroxide in 60 patients divided into two groups. The first group (80 nail sides) received a 2-minute application of Sodium Hydroxide, whereas the second group (76 nail sides) received a combination of curettage of the lateral matrix area and 1-minute application of Sodium Hydroxide. Postoperative pain, drainage, and tissue damage were evaluated 2 days after the operation and at three more visits with weekly intervals. Long-term success rates of the methods were evaluated on the 6th month and at a further visit with a mean time of 16.83±2.18 months (range, 13 to 20). Results. Partial matricectomy with 10% Sodium Hydroxide was found to be 100% successful in both of the groups (P>0.05). Postoperative pain and tissue damage were either absent or minimal in the great majority of the patients with no statistical difference between the two groups (P>0.05). On the 2nd day, more patients in the first group experienced mild drainage than the patients in the second group (P=0.001), but in the following control visits, this difference disappeared. Conclusion. Matricectomy with 10% Sodium Hydroxide, either applied for 2 minutes or 1 minute combined with curettage, is equally effective in the treatment of ingrowing toenails with high success rates and minimal postoperative morbidity.
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chemical matricectomy with 10 Sodium Hydroxide for the treatment of ingrowing toenails
Dermatologic Surgery, 2004Co-Authors: Esin Ozdemir, Seher Bostanci, Pelin Ekmekci, Erbak GurgeyAbstract:Background. In the last decades, phenol cauterization has been widely used with high success rates for the treatment of ingrowing toenails. However, unpredictable tissue damage and prolonged healing time are the disadvantages of this technique. Sodium Hydroxide is an alternative chemical agent that causes less tissue damage. Objective. In this study, long-term results and postoperative morbidity of two Sodium Hydroxide chemical matricectomy procedures carried out by different application times have been investigated. Methods. A total of 156 partial chemical matricectomy procedures were performed with 10% Sodium Hydroxide in 60 patients divided into two groups. The first group (80 nail sides) received a 2-minute application of Sodium Hydroxide, whereas the second group (76 nail sides) received a combination of curettage of the lateral matrix area and 1-minute application of Sodium Hydroxide. Postoperative pain, drainage, and tissue damage were evaluated 2 days after the operation and at three more visits with weekly intervals. Long-term success rates of the methods were evaluated on the 6th month and at a further visit with a mean time of 16.83±2.18 months (range, 13 to 20). Results. Partial matricectomy with 10% Sodium Hydroxide was found to be 100% successful in both of the groups (P>0.05). Postoperative pain and tissue damage were either absent or minimal in the great majority of the patients with no statistical difference between the two groups (P>0.05). On the 2nd day, more patients in the first group experienced mild drainage than the patients in the second group (P=0.001), but in the following control visits, this difference disappeared. Conclusion. Matricectomy with 10% Sodium Hydroxide, either applied for 2 minutes or 1 minute combined with curettage, is equally effective in the treatment of ingrowing toenails with high success rates and minimal postoperative morbidity.
Gwi-taek Jeong - One of the best experts on this subject based on the ideXlab platform.
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Rapeseed-straw enzymatic digestibility enhancement by Sodium Hydroxide treatment under ultrasound irradiation
Bioprocess and Biosystems Engineering, 2013Co-Authors: Kyeong Eop Kang, Gwi-taek Jeong, Don-hee ParkAbstract:In this study, we carried out Sodium Hydroxide and sonication pretreatments of rapeseed straw ( Brassica napus ) to obtain monosugar suitable for production of biofuels. To optimize the pretreatment conditions, we applied a statistical response-surface methodology. The optimal pretreatment conditions using Sodium Hydroxide under sonication irradiation were determined to be 75.0 °C, 7.0 % Sodium Hydroxide, and 6.8 h. For these conditions, we predicted 97.3 % enzymatic digestibility. In repeated experiments to validate the predicted value, 98.9 ± 0.3 % enzymatic digestibility was obtained, which was well within the range of the predicted model. Moreover, sonication irradiation was found to have a good effect on pretreatment in the lower temperature range and at all concentrations of Sodium Hydroxide. According to scanning electron microscopy images, the surface area and pore size of the pretreated rapeseed straw were modified by the Sodium Hydroxide pretreatment under sonication irradiation.
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Pretreatment of rapeseed straw by Sodium Hydroxide
Bioprocess and Biosystems Engineering, 2011Co-Authors: Kyeong Eop Kang, Gwi-taek Jeong, Don-hee ParkAbstract:Pretreatment method for rapeseed straw by Sodium Hydroxide was investigated for production of bioethanol and biobutanol. Various pretreatment parameters, including temperature, time, and Sodium Hydroxide concentration were optimized using a statistical method which is a central composite design of response surface methodology. In the case of Sodium Hydroxide pretreatment, optimal pretreatment conditions were found to be 7.9% Sodium Hydroxide concentration, 5.5 h of reaction time, and 68.4 °C of reaction temperature. The maximum glucose yield which can be recovered by enzymatic hydrolysis at the optimum conditions was 95.7% and the experimental result was 94.0 ± 4.8%. This experimental result was in agreement with the model prediction. An increase of surface area and pore size in pretreated rapeseed straw by Sodium Hydroxide pretreatment was observed by scanning electron microscope.
