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排序方式: 共有132条查询结果,搜索用时 15 毫秒
81.
Environmental Chemistry Letters - Short-chain chlorinated paraffins are industrial contaminants of great concern due to their persistent and toxic characteristics. The predicted distribution of... 相似文献
82.
Kuzuhara Shunsuke Akimoto Yuta Shibata Kazu Oguchi Masahiro Terazono Atsushi 《Journal of Material Cycles and Waste Management》2018,20(1):431-438
Journal of Material Cycles and Waste Management - Our objective was to provide the information necessary to efficiently recover metals from end-of-life lithium-ion secondary batteries by assessing... 相似文献
83.
Hisaaki Yagi Fumi Ninomiya Masahiro Funabashi Masao Kunioka 《Journal of Polymers and the Environment》2012,20(3):673-680
The anaerobic biodegradation rates of four different sizes of poly (lactic acid) (PLA) films (thickness 25???m) in anaerobic sludge at 55?°C were examined. The anaerobic biodegradation rates of small pieces of PLA film were slower than for large pieces of PLA film. We also examined whether PLA film could also be used as a reference material in the anaerobic biodegradation test in addition to PLA powder. The anaerobic biodegradation rate of PLA film became slower with lower activity sludge, but the rate of decrease was gradual, and the anaerobic biodegradation rate of PLA film was faster than the PLA powder (125?C250???m). The anaerobic biodegradation rate of the PLA powder (125?C250???m) reflected the plastic anaerobic biodegradation activity of the sludge more accurately than the thin PLA film (thickness 25???m). Consequently, PLA powder (125?C250???m) is more suitable than thin PLA film (thickness?<?25???m) for use as a reference material to assess the plastic anaerobic biodegradation activity of the sludge in an anaerobic biodegradation test at 55?°C. 相似文献
84.
Andriamanohiarisoamanana Fetra J. Sakamoto Yushi Yamashiro Takaki Yasui Seiichi Iwasaki Masahiro Ihara Ikko Nishida Takehiro Umetsu Kazutaka 《Journal of Material Cycles and Waste Management》2017,19(3):1253-1260
Journal of Material Cycles and Waste Management - The influence of temperature and storage time on hydrogen sulphide (H2S) emissions from two different dairy manures was investigated over four... 相似文献
85.
Koji Tokimatsu Rieko Yasuoka Masahiro Nishio Kazuhiro Ueta 《Environment, Development and Sustainability》2014,16(3):723-745
This paper has developed a method for forecasting the future paths of genuine savings (GS) with and without carbon dioxide (CO2) emissions constraints. GS calculations require shadow prices, which can be endogenously determined for variables and constraints in a model. However, in case of a ‘business as usual’ model (BAU), the shadow prices required for calculating GS without constraints show theoretically zero. This research derives the shadow prices required to measure GS for the BAU case as a function of several variables available in the optimal (economically efficient) case. This function is estimated from endogenously obtained variables from a model with environmental constraints. Subsequently, this function is used to calculate shadow prices with and without CO2 constraints, which are further employed to compute future paths of GS according to two methods applied in the papers by Arrow et al. We successfully estimated GS (or GSnt; GS with changes in population and technology) under the BAU case, however, suggest that GS (or GSnt) measures depend, to a great extent, on the time span under consideration (truncation year) for wealth accounting and the accounting methods by Arrows’ papers used for its estimation. In some cases, especially according to the methodology used by Arrow’s paper in 2004 using adjusted consumption in wealth accounting, the sign of GS (or GSnt) changes from negative to positive when changes in total factor productivity are taken into consideration. These aspects should be explored before measuring (un)sustainability of a particular path based on the GS (or GSnt) indicator. 相似文献
86.
Umme Salma Zohor Mohammad Shahedur Rahman Abdul Wahab Khan Masahiro Okanami Takashi Ano 《环境科学学报(英文版)》2013,(S1):S2-S7
To enhance the production of lipopeptide antibiotic iturin A, nutrient contents of the culture mediums were investigated in both submerged and biofilm fermentations. As a carbon source maltose and as nitrogen source, fish protein was used. In submerged fermentation maltose uptake was found lower (12%) compared to biofilm fermentation (15%) that was associated with higher cellular growth in biofilm. However, requirement of nitrogen (fish protein) concentration was found similar in both submerged and biofilm fermentations. Production of iturin A in submerged fermentation with 12% maltose and 5% fish protein was 4450 mg/L, and in biofilm fermentation it was 5050 mg/L when 15% maltose and 5% fish protein was used. 相似文献
87.
Norio Tanaka Teruko Demise Mitsuhiro Ishii Yasumasa Shoji Masahiro Nakaoka 《Marine Biology》2011,158(4):871-882
Massive losses of eelgrass Zostera marina beds in Japan have occurred over the past 100 years. Toward their restoration, transplantation of eelgrass has been attempted
in some areas, including Tokyo Bay. This study examined population genetic structures and gene flow in eelgrass in Tokyo Bay
to establish guidelines for conducting restoration. Genotypes of a total of 360 individuals from 12 beds were determined using
five microsatellite markers. The eelgrass beds in inner bay had above-average genetic diversity. A neighbor-joining tree based
on F
ST values among beds revealed that a strong gene flow had occurred among six beds in the inner bay. Genetic assignment testing
of drifting shoots indicated that those with seeds migrate in both directions between the inner and outer bay. We suggested
that the restoration of eelgrass in the innermost part of Tokyo Bay, where natural habitats have been lost, should be conducted
using the inner bay beds. 相似文献
88.
89.
Takaki Yamashiro Suraju A. Lateef Chun Ying Nilmini Beneragama Milos Lukic Iwasaki Masahiro Ikko Ihara Takehiro Nishida Kazutaka Umetsu 《Journal of Material Cycles and Waste Management》2013,15(4):539-547
Anaerobic co-digestion of dairy manure (DM) and concentrated food processing wastes (FPW) under thermophilic (55 °C) and mesophilic (35 °C) temperatures, and fertilizer value of the effluent were investigated in this study. Two types of influent feedstock were utilized: 100 % DM and a 7:3 mixture (wet weight basis) of DM and FPW. The contents of the FPW, as feedstock were 3:3:3:1 mixture of cheese whey, animal blood, used cooking oil and residue of fried potato. Four continuous digestion experiments were carried out in 10 L digesters. Co-digestion under thermophilic temperature increased methane production per digester volume. However, co-digestion at 35 °C was inhibited. Total Kjeldahl nitrogen (N) recovered after digestion ranged from 73.1 to 91.9 %, while recoveries of ammonium nitrogen (NH4-N) exceeded 100 %. The high recovery of NH4-N was attributed to mineralization of influent organic N. The mixture of DM and FPW showed greater recoveries of NH4-N after digestion compared to DM only, reflecting its greater organic N degradability. The ratios of extractable to total calcium, phosphorus and magnesium were slightly reduced after digestion. These results indicate that co-digestion of DM and FPW under thermophilic temperature enhances methane production and offers additional benefit of organic fertilizer creation. 相似文献
90.