Quoc Thinh Tran, M. Maeda, K. Oshita, M. Takaoka, T. Fujiwara
1 Graduate School of Environmental and Life Science, Okayama University (3-1-1, Tsushima-Naka, Kita-Ku, Okayama 700-8530, Japan) E-mail: tranquocthinh89@gmail.com 2 Professor, Graduate School of Environmental and Life Science, Okayama University (3-1-1, Tsushima-Naka, Kita-Ku, Okayama 700-8530, Japan) *Corresponding author E-mail: mun@cc.okayama-u.ac.jp 3 Associate Professor, Graduate School of Engineering, Kyoto University (Cluster C, Kyoto Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8540, Japan) E-mail: oshita.kazuyuki.6e@kyoto-u.ac.jp 4 Professor, Graduate School of Engineering, Kyoto University (Cluster C, Kyoto Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8540, Japan) E-mail: takaoka.masaki.4w@kyoto-u.ac.jp 5 Professor, Agriculture Unit, Research and Education Faculty, Kochi University (200 Monobe Otsu, Nankoku, Kochi 783-8502, Japan) E-mail: fujiwarat@kochi-u.ac.jp
{"title":"EFFECTS OF A WASHING PROCESS OF CATTLE MANURE ASH ON ROOT AND SHOOT GROWTH OF KOMATSUNA (BRASSICA RAPA VAR. PERVIRIDIS) AT THE SEEDLING STAGE","authors":"Quoc Thinh Tran, M. Maeda, K. Oshita, M. Takaoka, T. Fujiwara","doi":"10.3107/JESSS.8.15","DOIUrl":"https://doi.org/10.3107/JESSS.8.15","url":null,"abstract":"1 Graduate School of Environmental and Life Science, Okayama University (3-1-1, Tsushima-Naka, Kita-Ku, Okayama 700-8530, Japan) E-mail: tranquocthinh89@gmail.com 2 Professor, Graduate School of Environmental and Life Science, Okayama University (3-1-1, Tsushima-Naka, Kita-Ku, Okayama 700-8530, Japan) *Corresponding author E-mail: mun@cc.okayama-u.ac.jp 3 Associate Professor, Graduate School of Engineering, Kyoto University (Cluster C, Kyoto Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8540, Japan) E-mail: oshita.kazuyuki.6e@kyoto-u.ac.jp 4 Professor, Graduate School of Engineering, Kyoto University (Cluster C, Kyoto Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8540, Japan) E-mail: takaoka.masaki.4w@kyoto-u.ac.jp 5 Professor, Agriculture Unit, Research and Education Faculty, Kochi University (200 Monobe Otsu, Nankoku, Kochi 783-8502, Japan) E-mail: fujiwarat@kochi-u.ac.jp","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"232 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116203943","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}
{"title":"GREENHOUSE GAS CONCENTRATIONS IN SOIL UNDER DIFFERENT WATER MANAGEMENT PRACTICES FOR RICE PLANTS","authors":"T. Kato, K. Noborio","doi":"10.3107/jesss.11.mr03","DOIUrl":"https://doi.org/10.3107/jesss.11.mr03","url":null,"abstract":"","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126473798","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}
E-mail: pqvi8jtj@s.okayama-u.ac.jp 2 Assistant Professor, Graduate School of Environmental and Life Science, Okayama University (1-1-1, Tsushima-naka, Kita-ku, Okayama 700-8530, Japan) E-mail: t-nakamura@okayama-u.ac.jp 3 Professor, Graduate School of Environmental and Life Science, Okayama University (1-1-1, Tsushima-naka, Kita-ku, Okayama 700-8530, Japan) *Corresponding author, E-mail: yossan@okayama-u.ac.jp
{"title":"PREDOMINANT RICE PHYTOCHEMICALS AND THEIR DISEASE-PREVENTIVE EFFECTS","authors":"Hongyan Wu, Toshiyuki Nakamura, Yoshimasa Nakamura","doi":"10.3107/JESSS.10.MR01","DOIUrl":"https://doi.org/10.3107/JESSS.10.MR01","url":null,"abstract":"E-mail: pqvi8jtj@s.okayama-u.ac.jp 2 Assistant Professor, Graduate School of Environmental and Life Science, Okayama University (1-1-1, Tsushima-naka, Kita-ku, Okayama 700-8530, Japan) E-mail: t-nakamura@okayama-u.ac.jp 3 Professor, Graduate School of Environmental and Life Science, Okayama University (1-1-1, Tsushima-naka, Kita-ku, Okayama 700-8530, Japan) *Corresponding author, E-mail: yossan@okayama-u.ac.jp","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125677247","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}
Construction of final waste disposal sites has become increasingly difficult as the problem of their location has become an important issue. Final waste disposal sites have a negative image of fostering various kinds of pollution, increased traffic volume, noise by trucks and bulldozers, and aggravated living conditions. These concerns indicate that social factors, such as waste landfills' public image, must be considered along with physical factors when locating the final waste disposal sites. This paper presents a method for determining an optimal site from the two perspectives of physical and social factors. First, we estimate spatial distribution for physical factors using various costs for waste disposal and land prices. Secondly, using results of a survey, we investigate the relationship between cognition of final waste disposal site and age group as covariates and estimate spatial distribution for social factors from the spatial distribution for the age group.
{"title":"OPTIMAL ALLOCATION OF FINAL WASTE DISPOSAL SITES BASED ON PHYSICAL AND SOCIAL FACTORS","authors":"Myungjin Na, K. Kurihara, Naokazu Gion","doi":"10.3107/JESSS.1.25","DOIUrl":"https://doi.org/10.3107/JESSS.1.25","url":null,"abstract":"Construction of final waste disposal sites has become increasingly difficult as the problem of their location has become an important issue. Final waste disposal sites have a negative image of fostering various kinds of pollution, increased traffic volume, noise by trucks and bulldozers, and aggravated living conditions. These concerns indicate that social factors, such as waste landfills' public image, must be considered along with physical factors when locating the final waste disposal sites. This paper presents a method for determining an optimal site from the two perspectives of physical and social factors. First, we estimate spatial distribution for physical factors using various costs for waste disposal and land prices. Secondly, using results of a survey, we investigate the relationship between cognition of final waste disposal site and age group as covariates and estimate spatial distribution for social factors from the spatial distribution for the age group.","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121308391","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}
Nguyen Vu Duc Thinh, L. Q. Tuan, N. V. Thao, Nguyen Nhat Huynh Mai
{"title":"USING MULTIVARIATE STATISTICAL TECHNIQUES TO ASSESS WATER QUALITY OF THE SAIGON RIVER, VIETNAM","authors":"Nguyen Vu Duc Thinh, L. Q. Tuan, N. V. Thao, Nguyen Nhat Huynh Mai","doi":"10.3107/jesss.11.pp01","DOIUrl":"https://doi.org/10.3107/jesss.11.pp01","url":null,"abstract":"","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133283415","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}
A laboratory experimental study was conducted to investigate the effects of different coffee waste biochar materials at three temperatures on nitrous oxide (N 2 O) and carbon dioxide (CO 2 ) emissions from agricultural soil in Central Vietnam. Soil amended with 2% normal biochar, 2% functional biochar (with a high NO 3 -N adsorption capacity of 20 g N kg -1 ) or no addition was adjusted at 60% water holding capacity, conditioned with 100 mg N-NO 3 kg -1 dried-soil and aerobically incubated at 25 o C, 30 o C or 35 o C for 21 days. N 2 O and CO 2 emissions were measured on days 1, 3, 5, 7, 14 and 21. Results showed that the addition of normal biochar caused more CO 2 emission but less N 2 O emission compared to the functional biochar application. At 25 o C, biochar amendment had a neutral or positive effect on N 2 O and CO 2 emissions. At 35 C, biochar amendment reduced N 2 O and CO 2 emissions compared to the control. However, there was little difference in N 2 O and CO 2 emissions among biochar treatments. In addition, with increasing temperature, a positive correlation between temperature and N 2 O and CO 2 emissions with the non-biochar amendment and a negative correlation between temperature and N 2 O with the biochar treatments were observed. This is because temperature probably affects the rate of microbial processes mediating respiration and denitrification and the soil-biochar mixture’s mobilization of N
一项实验室实验研究调查了在三种温度下不同咖啡废物生物炭材料对越南中部农业土壤中氧化亚氮(n2o)和二氧化碳(CO 2)排放的影响。用2%普通生物炭、2%功能性生物炭(吸附no3 -N的能力为20 g N kg -1)或不添加改性土壤，调整土壤持水量为60%，加入100 mg N- no3 kg -1干燥土壤，在25℃、30℃或35℃条件下好氧培养21天。分别在第1、3、5、7、14和21天测量n2o和co2排放量。结果表明:与功能生物炭相比，普通生物炭的co2排放量增加，而n2o排放量减少;在25℃时，生物炭对n2o和CO 2排放的影响为中性或正效应。在35℃时，与对照相比，生物炭修正减少了n2和CO 2的排放。不同生物炭处理的氮氧化物和二氧化碳排放量差异不大。此外，随着温度的升高，温度与n2o和CO 2排放量与非生物炭处理呈正相关，与生物炭处理呈负相关。这是因为温度可能会影响微生物过程的速率，介导呼吸和反硝化作用以及土壤-生物炭混合物对氮的动员
{"title":"NITROUS OXIDE AND CARBON DIOXIDE EMISSIONS FROM AGRICULTURAL SOIL AMENDED WITH DIFFERENT TYPES OF BIOCHAR AT THREE TEMPERATURES","authors":"Ngoc Van Hoang, M. Maeda","doi":"10.3107/JESSS.8.22","DOIUrl":"https://doi.org/10.3107/JESSS.8.22","url":null,"abstract":"A laboratory experimental study was conducted to investigate the effects of different coffee waste biochar materials at three temperatures on nitrous oxide (N 2 O) and carbon dioxide (CO 2 ) emissions from agricultural soil in Central Vietnam. Soil amended with 2% normal biochar, 2% functional biochar (with a high NO 3 -N adsorption capacity of 20 g N kg -1 ) or no addition was adjusted at 60% water holding capacity, conditioned with 100 mg N-NO 3 kg -1 dried-soil and aerobically incubated at 25 o C, 30 o C or 35 o C for 21 days. N 2 O and CO 2 emissions were measured on days 1, 3, 5, 7, 14 and 21. Results showed that the addition of normal biochar caused more CO 2 emission but less N 2 O emission compared to the functional biochar application. At 25 o C, biochar amendment had a neutral or positive effect on N 2 O and CO 2 emissions. At 35 C, biochar amendment reduced N 2 O and CO 2 emissions compared to the control. However, there was little difference in N 2 O and CO 2 emissions among biochar treatments. In addition, with increasing temperature, a positive correlation between temperature and N 2 O and CO 2 emissions with the non-biochar amendment and a negative correlation between temperature and N 2 O with the biochar treatments were observed. This is because temperature probably affects the rate of microbial processes mediating respiration and denitrification and the soil-biochar mixture’s mobilization of N","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"207 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131846500","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}
While the loadings of nitrogen (N) and phosphorus (P) are enhanced by the human activities, dissolved silicate (DSi) supplied by natural weathering of minerals tends to be trapped in the eutrophicated still waters such as dammed reservoirs, which are also increasing globally. The consequent change in the N: P: Si stoichiometric ratio of the river water flowing into the coastal sea may be advantageous to flagellates (nonsiliceous and potentially harmful) but not to diatom (siliceous and mostly benign). This is the "silica deficiency hypothesis". We try to develop it further to the "extended silica deficiency hypothesis" as follows. While the diatoms effectively draw down the substances from the upper layer with their sinking after the spring bloom (biological pump), other algae do not. This will cause the retention of the surplus nutrients and biogenic substances in the upper layer and lead further to eutrophication of upper layer substantially. To verify this hypothesis, a simplified marine ecosystem model was developed taking the nutrient stoichiometry and differential behaviors of algae into account based on the comparison with the existing field monitoring results of four aquatic continua, where various types of silica decline are uncertain. Although, this study is still in the stage of improvement, the preliminary results infer that above hypothesis could be verified with the consideration of the behavioral characteristics of algae as well as the stoichiometric consideration. Sinking response to the nutrient depletion, which is specific to each algal group, is one of possible factors.
{"title":"EVALUATING THE EFFECTS OF CHANGE IN INPUT RATIO OF N: P: Si TO COASTAL MARINE ECOSYSTEM","authors":"A. Harashima","doi":"10.3107/JESSS.1.33","DOIUrl":"https://doi.org/10.3107/JESSS.1.33","url":null,"abstract":"While the loadings of nitrogen (N) and phosphorus (P) are enhanced by the human activities, dissolved silicate (DSi) supplied by natural weathering of minerals tends to be trapped in the eutrophicated still waters such as dammed reservoirs, which are also increasing globally. The consequent change in the N: P: Si stoichiometric ratio of the river water flowing into the coastal sea may be advantageous to flagellates (nonsiliceous and potentially harmful) but not to diatom (siliceous and mostly benign). This is the \"silica deficiency hypothesis\". We try to develop it further to the \"extended silica deficiency hypothesis\" as follows. While the diatoms effectively draw down the substances from the upper layer with their sinking after the spring bloom (biological pump), other algae do not. This will cause the retention of the surplus nutrients and biogenic substances in the upper layer and lead further to eutrophication of upper layer substantially. To verify this hypothesis, a simplified marine ecosystem model was developed taking the nutrient stoichiometry and differential behaviors of algae into account based on the comparison with the existing field monitoring results of four aquatic continua, where various types of silica decline are uncertain. Although, this study is still in the stage of improvement, the preliminary results infer that above hypothesis could be verified with the consideration of the behavioral characteristics of algae as well as the stoichiometric consideration. Sinking response to the nutrient depletion, which is specific to each algal group, is one of possible factors.","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132127238","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}
N. Hiền, Dinh Tien Tai, Ho Dac Thai Hoang, T. Pistorius, Le Thai Hung, M. Roth, Tran Khuong Duy, HO Ngoc Anh Tuan
{"title":"ECOSYSTEM BASED ADAPTATION FOR COASTAL SANDY FOREST RESTORATION: A CASE STUDY IN NORTH CENTRAL VIETNAM","authors":"N. Hiền, Dinh Tien Tai, Ho Dac Thai Hoang, T. Pistorius, Le Thai Hung, M. Roth, Tran Khuong Duy, HO Ngoc Anh Tuan","doi":"10.3107/jesss.11.pp02","DOIUrl":"https://doi.org/10.3107/jesss.11.pp02","url":null,"abstract":"","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131824361","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}
Carbon fibers are excellent mixing materials for mortar or concrete because they can prevent the generation of fracture inside the material. Carbon fibers have low specific gravity, high strength, and high elastic modulus; further, they are inert to many chemical substances and also have excellent heat resistance. For these reasons, carbon fibers can be used as excellent mixing materials for mortar or concrete.This study was initially started for the purpose of preventing the collapse of houses during the Great Hanshin-Awaji Earthquake; however, at present, it is also aimed at countering the effects of the Niigata Earthquake.Carbon fiber reinforced plastics (CFRP) are currently being used as structural materials in aircrafts, automobiles, etc., and will be discarded in large quantities as scrap. Hence, the objective of this study also includes the development of a breakthrough approach for recycling scrap CFRPs for application as mixing materials in concrete or mortar. Through this study, two new materials have been developed. The first material is carbon fiber reinforced mortar-A (CFRM-A) in which polyacrylonitrile (PAN) fiber is mixed into mortar; the second material is CFRM-B in which chopped CFRPs are mixed with CFRM-A. The fractural strength and elastic modulus of these materials have been measured. The results show that CFRM-B has sufficient capacity to be applied to the construction of earthquake-resistant structures. In addition, the fundamental experiments on the heat treatment of CFRPs are performed and the carbon fibers are extracted.A mass loss occurs in CFRPs at approximately 700 K; this becomes constant at approximately 30% above 1000 K. This loss is mainly generated by the thermal decomposition of the resin in CFRP. The activation temperature of CFRPs was estimated in this study. Therefore, the estimation of the mass loss in CFRP became possible.
{"title":"APPLICATION OF CARBON FIBER TO MORTAR","authors":"Kei-Ichi Okuyama","doi":"10.3107/JESSS.2.13","DOIUrl":"https://doi.org/10.3107/JESSS.2.13","url":null,"abstract":"Carbon fibers are excellent mixing materials for mortar or concrete because they can prevent the generation of fracture inside the material. Carbon fibers have low specific gravity, high strength, and high elastic modulus; further, they are inert to many chemical substances and also have excellent heat resistance. For these reasons, carbon fibers can be used as excellent mixing materials for mortar or concrete.This study was initially started for the purpose of preventing the collapse of houses during the Great Hanshin-Awaji Earthquake; however, at present, it is also aimed at countering the effects of the Niigata Earthquake.Carbon fiber reinforced plastics (CFRP) are currently being used as structural materials in aircrafts, automobiles, etc., and will be discarded in large quantities as scrap. Hence, the objective of this study also includes the development of a breakthrough approach for recycling scrap CFRPs for application as mixing materials in concrete or mortar. Through this study, two new materials have been developed. The first material is carbon fiber reinforced mortar-A (CFRM-A) in which polyacrylonitrile (PAN) fiber is mixed into mortar; the second material is CFRM-B in which chopped CFRPs are mixed with CFRM-A. The fractural strength and elastic modulus of these materials have been measured. The results show that CFRM-B has sufficient capacity to be applied to the construction of earthquake-resistant structures. In addition, the fundamental experiments on the heat treatment of CFRPs are performed and the carbon fibers are extracted.A mass loss occurs in CFRPs at approximately 700 K; this becomes constant at approximately 30% above 1000 K. This loss is mainly generated by the thermal decomposition of the resin in CFRP. The activation temperature of CFRPs was estimated in this study. Therefore, the estimation of the mass loss in CFRP became possible.","PeriodicalId":285932,"journal":{"name":"Journal of Environmental Science for Sustainable Society","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117247343","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}
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