Journal of the Korean wood science and technology最新文献

Coicis Semen Reduces Staphylococcus aureus Persister Cell Formation by Increasing Membrane Permeability 薏苡精液通过增加膜渗透性减少金黄色葡萄球菌固着细胞的形成

Journal of the Korean wood science and technology Pub Date : 2024-03-01 DOI: 10.5658/wood.2024.52.2.145

Min-jun Kim, Tae-Jong Kim

{"title":"Coicis Semen Reduces Staphylococcus aureus Persister\u0000 Cell Formation by Increasing Membrane Permeability","authors":"Min-jun Kim, Tae-Jong Kim","doi":"10.5658/wood.2024.52.2.145","DOIUrl":"https://doi.org/10.5658/wood.2024.52.2.145","url":null,"abstract":"Unlike resistant cells, persister cells resist antibiotics due to a decreased cellular metabolic rate and can transition back to normal susceptible cells when the antibiotic is removed. These persister cells contribute to the chronic symptoms of infectious diseases and promote the emergence of resistant strains with continuous antibiotic exposure. Therefore, eliminating persister cells represents a promising approach to significantly enhance antibiotic efficacy. Here, we found that Coicis Semen extract reduced Staphylococcus aureus persister cells at a concentration of 0.5 g/L. Linoleic acid and oleic acid, the major components of Coicis Semen extract, exhibited a comparable reduction in persister cells when combined with three antibiotics: ciprofloxacin, oxacillin, and tobramycin. Conversely, these effects were nullified in the presence of the surfactant Tween 80 (1%), suggesting that the hydrophobic characteristics of linoleic acid and oleic acids play a pivotal role in reducing the number of S. aureus persister cells. Considering the concentration-dependent effects of linoleic acid and oleic acid, the persister-reducing activity of Coicis Semen extract was primarily attributed to these fatty acids. Moreover, Coicis Semen extract, linoleic acid, and oleic acid increased the cell membrane permeability of S. aureus . Interestingly, this effect was counteracted by 1% Tween 80, indicating a close association between the reduction of persister cells and the increase in cell membrane permeability. The identified compounds could thus be used to eliminate persister cells, thereby enhancing therapeutic efficacy and shortening treatment duration. When used in conjunction with antibiotics, they may also mitigate chronic symptoms and significantly reduce the emergence of antibiotic-resistant bacteria.","PeriodicalId":17357,"journal":{"name":"Journal of the Korean wood science and technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140407014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anti-termite Activity of Tamanu Bark Extract (Calophyllum inophyllum L.) 塔玛努树皮提取物（Calophyllum inophyllum L.）的抗蚁活性

Journal of the Korean wood science and technology Pub Date : 2024-03-01 DOI: 10.5658/wood.2024.52.2.134

Ainun Zalsabila, W. Syafii, T. Priadi, Syahidah

{"title":"Anti-termite Activity of Tamanu Bark Extract (Calophyllum\u0000 inophyllum L.)","authors":"Ainun Zalsabila, W. Syafii, T. Priadi, Syahidah","doi":"10.5658/wood.2024.52.2.134","DOIUrl":"https://doi.org/10.5658/wood.2024.52.2.134","url":null,"abstract":"This study aimed to analyze the anti-termite properties of tamanu ( Calophyllum inophyllum L.) stem bark extracts against subterranean termites, specifically, Coptotermes curvignathus . The bark powder of C. inophyllum was extracted using different solvents, such as n-hexane, ethyl acetate, and methanol, using the maceration method. Anti-termite testing was performed using two paper disc methods: no-and two-choice tests. Whatman test paper was dripped with the extract solutions at concentrations of 4%, 6%, 8%, and 10% (w/v). Subsequently, the treated paper disc was placed into an acrylic tube, and the subterranean termite was added. The parameters utilized in the test included termite mortality and the weight loss of the test paper. The results revealed that the total extract yield of C. inophyllum stem bark was 30.24%. Furthermore, the extractive substances from C. inophyllum bark exhibited anti-termite activity. The most favorable outcomes were obtained with the n-hexane and ethyl acetate extracts at a concentration of 10%. The termite mortality and weight loss of the test paper were respectively 66% and 5.67% for the n-hexane extract and 66.67% and 6.19% for the ethyl acetate extract. In addition, the n-hexane extract contained friedelan-3-one, while the ethyl acetate extract contained 1,2-benzene dicarboxylic acid, dinonyl ester, and friedelan-3-one. The results suggested that these compounds are responsible for the observed anti-termite activity.","PeriodicalId":17357,"journal":{"name":"Journal of the Korean wood science and technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140407728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Study on the Positioning Strategy of Wood Cultural Experience Center 伍德文化体验中心定位战略研究

Journal of the Korean wood science and technology Pub Date : 2024-03-01 DOI: 10.5658/wood.2024.52.2.175

Kyungrok Won, Jinwoong Byeon, Dowoong Yoon, Jonghye Park, Hanmin Park, Heeseop Byeon

引用次数: 0

Conversion Characteristics of Chemical Constituents in Liriodendron tulipifera and Their Influences on Biomass Recalcitrance during Acid-Catalyzed Organosolv Pretreatment 酸催化有机溶胶预处理过程中 Liriodendron tulipifera 中化学成分的转化特征及其对生物质再抗性的影响

Journal of the Korean wood science and technology Pub Date : 2024-03-01 DOI: 10.5658/wood.2024.52.2.101

K. Gwak, Jun-Ho Shin, Chae-Hwi Yoon, In-Gyu Choi

{"title":"Conversion Characteristics of Chemical Constituents in\u0000 Liriodendron tulipifera and Their Influences on Biomass\u0000 Recalcitrance during Acid-Catalyzed Organosolv Pretreatment","authors":"K. Gwak, Jun-Ho Shin, Chae-Hwi Yoon, In-Gyu Choi","doi":"10.5658/wood.2024.52.2.101","DOIUrl":"https://doi.org/10.5658/wood.2024.52.2.101","url":null,"abstract":"The conversion characteristics of the major components of Liriodendron tulipifera were investigated during acid-catalyzed organosolv pretreatment. Glucan in L. tulipifera was slowly hydrolyzed, whereas xylan was rapidly hydrolyzed. Simultaneous hydrolysis and degradation of xylan and lignin occurred; however, after complete hydrolysis of xylan at higher temperatures, lignin remained and was not completely degraded or solubilized. These conversion characteristics influence the structural properties of glucan in L. tulipifera . Critical hydrolysis of the crystalline regions in glucan occurred along with rapid hydrolysis of the amorphous regions in xylan and lignin. Breakdown of internal lignin and xylan bonds, along with solubilization of lignin, causes destruction of the lignin-carbohydrate complex. Over a temperature of 160℃, the lignin that remained was coalesced, migrated, and re-deposited on the surface of pretreated solid residue, resulting in a drastic increase in the number and content of lignin droplets. From the results, the characteristic conversions of each constituent and the changes in the structural properties in L. tulipifera effectively improved enzymatic hydrolysis in the range of 140℃–150℃. Therefore, it can be concluded that significant changes in the biomass recalcitrance of L. tulipifera occurred during organosolv pretreatment.","PeriodicalId":17357,"journal":{"name":"Journal of the Korean wood science and technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140403462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Utilization of Sapwood Waste of Fast-Growing Teak in Activated Carbon Production and Its Adsorption Properties 利用速生柚木边材废料生产活性炭及其吸附性能

Journal of the Korean wood science and technology Pub Date : 2024-03-01 DOI: 10.5658/wood.2024.52.2.118

J. Sutapa, G. Lukmandaru, S. Sunarta, R. Pujiarti, D. Irawati, Rizki Arisandi, Riska Dwiyanna, Robertus Danu Priyambodo

{"title":"Utilization of Sapwood Waste of Fast-Growing Teak in Activated Carbon\u0000 Production and Its Adsorption Properties","authors":"J. Sutapa, G. Lukmandaru, S. Sunarta, R. Pujiarti, D. Irawati, Rizki Arisandi, Riska Dwiyanna, Robertus Danu Priyambodo","doi":"10.5658/wood.2024.52.2.118","DOIUrl":"https://doi.org/10.5658/wood.2024.52.2.118","url":null,"abstract":"The sapwood portion of fast-growing teak is mostly ignored due to its inferior quality. One of the possibilities for utilizing sapwood waste is to convert it into activated carbon that has good adsorption capabilities. The raw materials used in this research were sapwood of 14-year-old fast-growing teak sapwood (FTS) waste, which was taken from three trees from community forests in Wonosari, Gunungkidul, Yogyakarta Special Region. FTS waste was taken from the bottom of the tree up to a height of 1.3 m. The activation process is conducted with an activation temperature of 750℃, 850℃, and 950℃. The heating duration consists of three variations: 30 min, 60 min, and 90 min. The quality evaluation parameters of activated carbon include yield, moisture content, volatile matter content, ash content, fixed carbon content, adsorption capacity of benzene, adsorption capacity of methylene blue, and adsorption capacity of iodine. The results showed that the activated carbon produced had the following quality parameters: yield of 75.61%; moisture content of 1.27%; volatile matter content of 9.98%; ash content of 5.43%; fixed carbon content of 84.58%; benzene absorption capacity of 8.58%; methylene blue absorption capacity of 87.73 mg/g; and iodine adsorption capacity of 948.19 mg/g. It can be concluded that activated carbon from FTS waste has good iodine adsorption, which fulfilled the SNI 06-3730-1995 quality standard. Due to the iodine adsorption ability of FTS waste activated carbon, the conversion of FTS waste to activated carbon is categorized as a potential method to increase the value of this material.","PeriodicalId":17357,"journal":{"name":"Journal of the Korean wood science and technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140405615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of the Boundary between Juvenile–Mature Wood of Diospyros kaki and Their Wood Anatomical Variations 确定 Diospyros kaki 幼木与成熟木的界限及其木质解剖变化

Journal of the Korean wood science and technology Pub Date : 2024-03-01 DOI: 10.5658/wood.2024.52.2.191

Eka Kartikawati, Bienitta, Fanany Wuri Prastiwi, W. D. Nugroho

{"title":"Determination of the Boundary between Juvenile–Mature Wood of Diospyros kaki and Their Wood Anatomical Variations","authors":"Eka Kartikawati, Bienitta, Fanany Wuri Prastiwi, W. D. Nugroho","doi":"10.5658/wood.2024.52.2.191","DOIUrl":"https://doi.org/10.5658/wood.2024.52.2.191","url":null,"abstract":"Persimmon wood ( Diospyros kaki ) is a seasonal fruit-producing plant with a beautiful dark pattern in its wood that is suitable for high-quality furniture, sculptures and musical instruments. The utilization of persimmon wood can be improved by determining its anatomical characteristics, such as juvenile and mature wood. This study aimed to determine the boundaries between juvenile and mature wood and observe the anatomical properties of juvenile and mature wood and their variations in the axial direction. Three 30-year-old persimmon ( D. kaki ) trees grown in Karo, North Sumatra, Indonesia, were used in this study. The boundary between juvenile and mature wood was determined by measuring the fiber length and vessel element length from near the pith to near the bark. Anatomical observations were conducted in the juvenile and mature wood areas. The results showed that the average boundaries between juvenile and mature wood were 44.11 mm from the pith and were not significantly different in the axial direction of the trees. Furthermore, the wood anatomy categories of juvenile and mature wood differed significantly in terms of fiber diameter, fiber proportion, vessel proportion, and axial parenchyma proportion. In the axial direction, vessel diameter, ray parenchyma frequency, and ray parenchyma proportion at the base, middle, and top of the tree were significantly different.","PeriodicalId":17357,"journal":{"name":"Journal of the Korean wood science and technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140402933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physical and Mechanical Properties of Light Red Meranti Treated with Boron Preservatives 用硼防腐剂处理过的浅红色柳桉的物理和机械特性

Journal of the Korean wood science and technology Pub Date : 2024-03-01 DOI: 10.5658/wood.2024.52.2.157

Man Djun Lee, Ridge Wei Cheong Tang, Zeno Michael, Miqdad Khairulmaini, Azmi Roslan, Ahmad Faidzal Khodori, Hazim Sharudin, Pui San Lee

引用次数: 0

Fixed Bed Drying of Sugarcane Bagasse Using Solar Energy 利用太阳能固定床干燥甘蔗渣

Journal of the Korean wood science and technology Pub Date : 2024-01-01 DOI: 10.5658/wood.2024.52.1.47

Hyoung-Woo Lee, Hyun-Ook Kim, Dong-Hoon Lee, Don-Ha Choi, Seung-Gyu Kim

引用次数: 0

Evaluation of Adhesive Characteristics of Mixed Cross Laminated Timber (CLT) Using Yellow Popular and Softwood Structural Lumbers 使用黄色流行木材和软木结构木材评估混合交叉层压木材 (CLT) 的粘合特性

Journal of the Korean wood science and technology Pub Date : 2024-01-01 DOI: 10.5658/wood.2024.52.1.58

Keon-Ho Kim, Hyun-Mi Lee, Min Lee

引用次数: 0

Drying Efficiency of Betung Bamboo Strips (Dendrocalamus asper) Based on Different Solar Drying Oven Designs 基于不同太阳能干燥炉设计的贝东竹条（Dendrocalamus asper）干燥效率

Journal of the Korean wood science and technology Pub Date : 2024-01-01 DOI: 10.5658/wood.2024.52.1.1

I. Sumardi, Anggit Kusuma Dewan Daru, Alfi Rumidatul, R. Dungani, Y. Suhaya, Neil Prihanto, Rudi Hartono

{"title":"Drying Efficiency of Betung Bamboo Strips (Dendrocalamus\u0000 asper) Based on Different Solar Drying Oven Designs","authors":"I. Sumardi, Anggit Kusuma Dewan Daru, Alfi Rumidatul, R. Dungani, Y. Suhaya, Neil Prihanto, Rudi Hartono","doi":"10.5658/wood.2024.52.1.1","DOIUrl":"https://doi.org/10.5658/wood.2024.52.1.1","url":null,"abstract":"Betung bamboo ( Dendrocalamus asper ) is used as a building and handicraft material in Indonesia; however, bamboo needs to be dried to increase its stability. This study aimed to evaluate the efficiency of drying bamboo using solar energy and different drying oven designs. The betung bamboo pieces were dried using a direct solar dryer (direct drying) and an indirect solar dryer (indirect drying) and then the decrease in levels that occurred based on the relative humidity (RH) and temperature values achieved in the two dryers were compared. The highest average temperature in the direct indirect drying oven compartment was 60.1 ± 13.1℃ with 19.9 ± 16.4% RH and 60.2 ± 11.9℃ with 19.5 ± 15.5% RH, respectively. The drying defect in indirect drying was lower than that in direct drying, and indirect drying had a 61.7% greater average water loss than direct drying with significant difference (95%, analysis of variance) based on water loss/compartment volume parameters. Thus, the solar drying oven can be used to air-dry bamboo (14%) for 7 d from an initial moisture content of 70%–80% in bamboo strips. The results of this research can be used for small-scale bamboo processing industries that have limited use of electrical energy with quite good results.","PeriodicalId":17357,"journal":{"name":"Journal of the Korean wood science and technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140519349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0