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Delignification of disposable wooden chopsticks waste for fermentative hydrogen production by an enriched culture from a hot spring
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作者 Kanthima Phummala Tsuyoshi Imai +5 位作者 Alissara Reungsang Prapaipid Chairattanamanokorn Masahiko Sekine Takaya Higuchi Koichi Yamamoto Ariyo Kanno 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2014年第6期1361-1368,共8页
Hydrogen (H2) production from lignocellulosic materials may be enhanced by removing lignin and increasing the porosity of the material prior to enzymatic hydrolysis. Alkaline pretreatment conditions, used to deligni... Hydrogen (H2) production from lignocellulosic materials may be enhanced by removing lignin and increasing the porosity of the material prior to enzymatic hydrolysis. Alkaline pretreatment conditions, used to delignify disposable wooden chopsticks (DWC) waste, were investigated. The effects of NaOH concentration, temperature and retention time were examined and it was found that retention time had no effect on lignin removal or carbohydrate released in enzymatic hydrolysate. The highest percentage of lignin removal (41%) was obtained with 2% NaOH at 100℃, correlated with the highest carbohydrate released (67 mg/gpretreated DWC) in the hydrolysate. An enriched culture from a hot spring was used as inoculum for fermentative H2 production, and its optimum initial pH and temperature were determined to be 7.0 and 50℃, respectively. Furthermore, enzymatic hydrolysate from pretreated DWC was successfully demonstrated as a substrate for fermentative H2 production by the enriched culture. The maximum H2 yield and production rate were achieved at 195 mL H2/g total sugarsconsumed and 1 16 mL Hz/(L.day), respectively. 展开更多
关键词 alkaline pretreatment disposable wooden chopsticks waste fermentative hydrogen production hot spring enriched culture
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Delayed pseudoaneurysm formation of the carotid artery following the oral cavity injury in a child:A case report
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作者 Byeoung Hoon Chung Mi Rin Lee +3 位作者 Jae Do Yang Hee Chul Yu Yong Tae Hong Hong Pil Hwang 《World Journal of Clinical Cases》 SCIE 2021年第16期4104-4109,共6页
BACKGROUND An impalement injury of the oral cavity is a common traumatic injury in children.In most cases,it is not accompanied by sequelae,but if foreign body residues are not found due to a minor injury,they may res... BACKGROUND An impalement injury of the oral cavity is a common traumatic injury in children.In most cases,it is not accompanied by sequelae,but if foreign body residues are not found due to a minor injury,they may result in inflammatory responses and delayed vascular injuries in the surrounding tissues.Without early diagnosis and appropriate initial management,residual foreign bodies can cause serious complications and even mortality in some cases.CASE SUMMARY A 9-year-old boy suffered an intra-oral injury by a wooden chopstick,and the patient was discharged from the hospital after receiving conservative treatment for the injury.However,the patient was readmitted to the hospital due to intraoral bleeding,and since neck hematoma and right internal carotid artery pseudoaneurysm formation were detected on computed tomography,emergency surgery was performed.A remnant fragment of a wooden chopstick was found during the operation,and a delayed rupture of the internal carotid artery caused by the foreign body was also found.CONCLUSION The failure of early detection and diagnosis of a residual foreign body may result in delayed vascular rupture. 展开更多
关键词 PSEUDOANEURYSM Carotid artery injury Oral cavity wooden chopsticks Case report
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