Mokuzai Gakkaishi最新文献_第8页

Carbon Stocks in Harvested Wood Products in Various Countries of the World 世界各国采伐木制品中的碳储量

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2020-04-25 DOI: 10.2488/jwrs.66.76

Akiko Suyari, Yushin Shinoda, Chihiro Kayo

{"title":"Carbon Stocks in Harvested Wood Products in Various Countries of the World","authors":"Akiko Suyari, Yushin Shinoda, Chihiro Kayo","doi":"10.2488/jwrs.66.76","DOIUrl":"https://doi.org/10.2488/jwrs.66.76","url":null,"abstract":"With the aim of supporting measures for climate change mitigation, we estimated carbon stocks in harvested wood products （HWP） in various countries of the world between 1961 and 2016. Global carbon stocks in HWP in 2016 under the stock change approach （SCA） as the carbon accounting approach and first order decay （FOD） as the decay function were estimated to be approximately 73.3 hundred million tons of carbon （t-C）, which represents an increase of 2.5 times over the past 55 years. It was confirmed that the annual increase of global carbon stocks between 2015 and 2016 was approximately 1.1 hundred million t-C/year, which was the maximum value during the entire target period. At the national scale, in 2016, the largest carbon stocks of HWP, listed in descending order, were in the United States of America, China, the Russian Federation, and Japan. With respect to the annual increase of carbon stocks for the period from 2015 to 2016, China contributed the most to the global annual increase, nearly 67% of the total. On the other hand, global carbon stocks in 2016 under the production approach for the second commitment period of the Kyoto Protocol （PAkp） were estimated to be approximately 68% of those under the SCA, revealing that the PAkp could conservatively estimate the global carbon stocks in HWP. Furthermore, annual changes of carbon stocks obtained using the normal distribution varied significantly from those obtained using the FOD, suggesting that decay functions for an appropriate method for estimating carbon stocks of HWP need to be reconsidered.","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2020-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46818448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

CO Oxidation Performance of Japanese Cedar Charcoal Loaded with Copper-manganese Oxide Using a Ball Mill 球磨负载铜锰氧化物的日本雪松炭的CO氧化性能

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2020-04-25 DOI: 10.2488/jwrs.66.67

Yukuo Fujita, T. Takase, Takashi Asada

引用次数: 0

Quantifying the Greenhouse Gas Emissions in the Construction of Wooden School Structures Using the Cross-laminated Timber Construction Method 用交叉层压木结构法量化木质学校建筑的温室气体排放

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2020-04-25 DOI: 10.2488/jwrs.66.101

Yuki Fuchigami, Kenta Watanabe, T. Nakai

{"title":"Quantifying the Greenhouse Gas Emissions in the Construction of Wooden School Structures Using the Cross-laminated Timber Construction Method","authors":"Yuki Fuchigami, Kenta Watanabe, T. Nakai","doi":"10.2488/jwrs.66.101","DOIUrl":"https://doi.org/10.2488/jwrs.66.101","url":null,"abstract":"The volume of greenhouse gases （GHGs） emitted during the process from product manufacturing step to the construction process in the life cycle of a wooden school building （two stories; total floor area : 407.2 m 2 ） constructed using cross-laminated timber （CLT） was quantified. GHG emissions were also quantified for school buildings with a reinforced concrete structure （hereafter, “RC structure”） and for those with a steel structure （hereafter, “S structure”）, keeping all other specifications constant. The GHG emissions were then compared between scenarios. The results were as follows. The volume of GHG emissions from the CLT products used to construct the wooden school building using the CLT method, over the life cycle of the building, was 442 kg CO 2 e/m 3 . The volume of GHG emissions for the wooden school building itself was 168 t CO 2 e. And, the volume of GHG emissions for the school buildings with the RC and S structures was 242 t CO 2 e and 206 t CO 2 e, respectively. These results showed that using the CLT construction method to build structures for a school can reduce GHG emissions by approximately 30.6% and 18.5%, respectively, compared to using an RC structure or an S structure. (cid:9487)(cid:9513)(cid:9533)(cid:9531)(cid:9523)(cid:9526)(cid:9512)(cid:9527) : LCCO 2 , GHG emission, wooden school building, CLT method.","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2020-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43345522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Electron-beam Irradiation on Plastic Flow Deformation of Wood 电子束辐照对木材塑性流动变形的影响

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2020-04-25 DOI: 10.2488/jwrs.66.59

Hideaki Sugino, Soichi Tanaka, Y. Kasamatsu, S. Okubayashi, M. Seki, T. Miki, K. Umemura, Kozo Kanayama

引用次数: 3

Preparation of High Wet-Strength Paper from Rice Straw Pulp by Treatment with ZnCl2 Aqueous Solution 氯化锌水溶液处理稻草浆制备高湿强纸

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2020-01-25 DOI: 10.2488/jwrs.66.46

Xu Yinchao, Guangfan Jin, Rui Zhai, Chunfeng Zhu, Lijun Wang, Anbo Wu, A. Nakagawa-izumi

引用次数: 1

Fire Retardancy of Fire-retardant-impregnated Wood after Natural Weathering II. 阻燃剂浸渍木材在自然风化后的阻燃性能Ⅱ。

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2020-01-25 DOI: 10.2488/jwrs.66.31

Masayuki Kawarasaki, Ryoichi Hiradate, Y. Hirabayashi, S. Kikuchi, Y. Ohmiya, Jaeyoung Lee, Masaki Noaki, Noboru Nakamura

引用次数: 1

Method for Determining Sample Size to Measure MOR of Particleboard Using Monte Carlo Simulation 用蒙特卡罗模拟确定刨花板MOR测量样本大小的方法

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2020-01-25 DOI: 10.2488/jwrs.66.1

H. Korai, Ken Watanabe

{"title":"Method for Determining Sample Size to Measure MOR of Particleboard Using Monte Carlo Simulation","authors":"H. Korai, Ken Watanabe","doi":"10.2488/jwrs.66.1","DOIUrl":"https://doi.org/10.2488/jwrs.66.1","url":null,"abstract":"To measure the modulus of rupture （MOR） of particleboard, a method for determining sample size was developed. First, the MOR of a large number of samples was measured. A total of 10000 sample means were calculated by applying Monte Carlo simulations to the measured MORs, and relationships between sample size and sample mean were analyzed. When the sample size was 15, 9605 sample means among the 10000 sample means were within in the 95% confidence interval. As a result, the sample size was set at 15, and the probability of means occurring within the interval was very high, i.e., 96.05%. Next, the 5, 10, 20, and 30% points of the 9605 sample means were calculated, which reached the 95% confidence interval when the sample sizes were 10, 8, 4, and 2, respectively. For example, when the sample size was 2, the probability of means occurring within the interval was relatively high, i.e., 67.55%. Because the general method calculated a sample size of 28, our method could markedly decrease the sample size. (cid:9487)(cid:9513)(cid:9533)(cid:9531)(cid:9523)(cid:9526)(cid:9512)(cid:9527) : particleboard, modulus of rupture, sample size, Monte Carlo simulation, 95% confidence interval.","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":"1 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2020-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69067628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chemical Characteristics of Bamboo (Phyllostachys pubescens) Fiber Fractions Produced by a Laboratory Thermomechanical Refiner 实验室热机械精制竹纤维馏分的化学特性

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2020-01-25 DOI: 10.2488/jwrs.66.16

Guangfan Jin, Vu Thang Do, Yunmeng Wu, Kuan-hsuan Lin, Chunfeng Zhu, A. Nakagawa-izumi

引用次数: 0

Partial Compressive Properties of Cross Laminated Timber I. 交叉层压木材的部分压缩性能I。

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2020-01-25 DOI: 10.2488/jwrs.66.8

Marina Totsuka, K. Aoki, Masahiro Inayama, Kimihiko Morita

引用次数: 4

Economic Impacts of Increases in Domestic Timber Utilization in Wooden Framework for Residential Construction 住宅建筑木质框架中国内木材使用量增加的经济影响

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2020-01-25 DOI: 10.2488/jwrs.66.23

Soei Kawamura, M. Inoue

{"title":"Economic Impacts of Increases in Domestic Timber Utilization in Wooden Framework for Residential Construction","authors":"Soei Kawamura, M. Inoue","doi":"10.2488/jwrs.66.23","DOIUrl":"https://doi.org/10.2488/jwrs.66.23","url":null,"abstract":"This study aimed to evaluate the economic impacts of increasing the ratio of domestic timber used in wooden framework for residential construction. We performed two assessments: a simulation in which the ratio of domestic timber utilization in Japanese wooden framework residential industry is increased by 1% above the actual ratio, and a case analysis of the leading housing company, T Home. The findings showed that increasing the ratio of domestic timber not only had an overall economic effect but also affected the earnings of the housing manufacturer in some cases. On the other hand, in the simulation, induced production increased by 4.49 billion yen and the gross value added increased by 2.10 billion yen if the ratio of domestic timber utilization in the Japanese wooden-framework residential construction industry increased by 1% above the actual ratio of 2018. The results of the simulation and the case analysis proved that the economic impact on the forest products industry is larger when wood products are processed in Japan, even if they originate from a foreign country and the economic impact on forestry is larger when lumber rather than either plywood or laminated timber is used.","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2020-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44069720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0