Biomass based-Activated Charcoal for Adsorption Dehumidification in Humid Region
In this study, we developed activated charcoal (AC) as the desiccant materials derived from waste biomass. The ability of AC to remove the moisture was controlled by carefully preparing the material using several conditions. The efficacy of the ACs for dehumidification applications was assessed using the weather data from several regions of Indonesia. The results revealed that under the studied conditions, the new desiccant material showed a better dehumidification capacity than silica gel. Moreover, the reported AC can be regenerated using temperatures as low as 40℃, which is readily available from waste heat.
Japan is facing a serious issue of low fertility. In response to the problem, Japan has promulgated 32 low fertility policy plans from the year of 1994 to 2018. This study examines the influences of politics on the policy processes of these policy plans. This study adopts the ‘policy window’ as the analytical framework. Through the analyses of the policy processes of Japan’s low fertility policies in different phases, this study finds that the influence of the ‘politics stream’ in the policy window increases over time, shifting the policy making from a ‘bureaucracy-led’ to a ‘cabinet-dominant’ pattern.
Towards SDGs: the improvement of copper processing using flotation for safe and sustainable copper production
Copper is an important material for producing clean energy in the future. Flotation, as one of the methods for copper production, can contribute to clean copper production by minimizing the contaminants and by improving the process efficiency. In this study, seawater was used to replace the freshwater in the flotation process, saving the freshwater resources for other's use and also reducing the CO2 emission from the desalination plant. In addition, an oxidation method was developed to replacing a toxic and harmful NaHS method. Therefore, the flotation can be safer, thus improves the health of the employee.
To effectively mitigate the number of premature deaths due to PM2.5 emissions from coal power plants in China, it is important not only to estimate the current number of premature deaths, but to estimate the potential for mitigating premature deaths. This study proposed a new integrated research framework that combines data envelopment analysis, chemical transport simulation, and health impact assessment to estimate the potential of premature death mitigation. Our empirical analysis revealed that there was significant premature death mitigation potential around Chengdu City, and that priority should be given to improving the environmental efficiency of power plants in this area.
In this study, the calyx part of Hibiscus sabdariffa Linn.(Okinawa) were taken as the study objects. Through the establishment of bioactivity evaluation system and bio-guided isolation method, the components with reversing-senescence activity were identified,it was the first time to evaluate the reversing-senescence potential and clarified the major active component in Hibiscus sabdariffa. and the mechanism of these ingredients is being further studied now. This study suggested that Hibiscus sabdariffa have high possibility to be used as reversing-senescence reagent or skin care products in the future, provided a new considerable way for the regeneration and utilization of plants in nature.
Lucanid larvae mainly inhabit and utilize rotten wood and/or humus. They also show a food preference against the types and stages of decay at a genus level. Since their preference is thought to be related to the kinds and the activity of enzyme, I tried to reveal the relationship between C/N ratio in their preferred habitat and digestive enzymatic abilities against CM-cellulose, β-1,4-xylan, and β-1,3-glucan in the larval midgut of some species of Lucanidae and Trypoxylus dichotomus. The results indicated that two correlations were observed between C/N ratio and each glycanase and glycosidase against CM-cellulose and β-1,3-glucan, respectively.
This research focuses on the negotiation between remaining public space on the sidewalk and public space taken away for vending purposes. Based on the observations and statistical analysis, the dynamic changes in thirty days. The result indicated the dynamic change of public uses on the sidewalk in different circumstances. Also, the remaining space for passengers on the sidewalk is reduced significantly during the evening time and during weekdays.
8.ASMAA KAMALELDEEN AHMED MOHAMED REZK ELNAGDY（農学研究院・博士課程）
Suspect and non-target screening of emerging contaminants in wastewater using LC-QTOF/MS: An insight on occurrence, fate, risk, and wastewater management in Asia
Domestic wastewater is a major pollution source to water environment in many Asian countries. In the respect of water environmental conservation,it is important to reduce the pollution load from domestic sector. Therefore, a comprehensive suspect and non-target screening workflow based on LC-QTOF/MS was developed for identification of contaminants in wastewater. Occurrence, fate and risk was studied. Multivariate analysis demonstrated an effective wastewater treatment process.The workflow would have wider implication in wastewater management in Asia region.
Recently, the scientific interest and the economic significance of halophytes has been highly demanding due to medicinal and nutraceutical potential of its bioactive compounds.
A xero-halophyte Bassia indica. is a very cheap source of natural entities without any investigation.In this study, a new acylated flavonol tetraglycoside, rare flavonol triglycoside, new alkaloid , alongside with new seco-glycosidic oleanane saponin with 2'R,3'S stereocenters, were isolated from the aerial parts of Bassia indica. The study also reported an optimal separation of rare occurring R-isomer lignanamide, in addition to its known corresponding S-isomer.
The acetylcholinesterase inhibitory activity of the isolated compounds was evaluated.
Modified sequential bio-treatment of double refractory gold ore (DRGO) was developed to improve gold recovery. HCl washing was utilized after sulfide oxidation and before carbonaceous degradation. The maximum gold recovery was 85% in the sample after HCl washing and carbonaceous degradation but recovery was 64% in the sample after carbonaceous degradation without HCl washing. Although the difference of both sample was only HCl washing, HCl washing has significantly increased gold recovery. This is because HCl washing contributed to the removal of jarosite and effective carbonaceous degradation. Thus, treatments of DRGO should be modified by considering the ore’s own characteristics.
79Se has a 3.27 x 105 years of long half-life and selenate can be immobilized in LDHs based on cement hydration. If the radioactive wastes are released into the soil environment during long-term storage, the adsorbed radionuclides might be possibly contacted with SOM. However, the releasing behaviors of SeO42- from LDHs are still unclear, but important to evaluate its effectiveness. We found smaller sized amino acids have a more serious risk to unstabilize selenate. Carbonate is also another environmentally important threatening factor to the stability of selenate. The necessity of engineering measures to improve the stability of selenate was emphasized.
Protective effects of acetone extract from Entada phaseoloides leaves on UVB-irradiated HaCaT keratinocytes
Entada phasioloides was reported to have triterprene, saponin, and phenolic compounds, which has protective effect on UVB-irradiation and anti-inflammation. In southeast Asia, stems and seeds of E. phaseoloides have been used as soap, as well as traditional medicine to treat skin diseases. However, the leaves of E. phaseoloides are barely reported their biological activites. In this study, we investigated the protective effect of acetone extract from E. phaseoloides leaves (AE) on UVB-irradiated human epidermal keratinocytes (HaCaT cells). The results show that AE, which is effective at 40 µg/mL, has nontoxic effect on normal keratinocyte HaCaT cells. UVB damage (30 mJ/cm2) resulted significant reduction in cell viability in a time dependent manner. HaCaT cells were pretreated with AE for 24 h and the irradiated with UVB rays. The results showed that the AE prevented UVB-induced cytotoxicity which was verified by MTT assay.
At present, the research on the metabolites in Hericium erinaceus is still insufficient, further exploration of its metabolites can further tap the potential of Hericium erinaceus and its related products as food supplements and alternative drugs.To solve these problems, it is necessary to isolate and purify the metabolites in Hericium erinaceus, analyze and identify the chemical formula and structural formula, and use it as a standard sample, in this process, the known compounds can be summarized, and new compounds may be discovered.
The purpose of this study is to improve the development and management of tourism destinations and promote the sustainability of tourism destinations. Taking Qinghai Lake as the research area, including tourist behavior, social interests, government policies and social environment are selected to analyze. Through the analysis of the questionnaire survey of three ethnic autonomous prefectures, the acceptance of tourism development of residents in different ethnic regions, Our most important finding is that different ethnicities affect the residents' acceptance of tourism development. The order of acceptance of ethnic groups is Han > Mongolian > Salar and other minorities > Tibetan.
Ghalegaun Tourism Model for Community Integration and Sustainability
Many marginalized communities are losing their identities, and people are leaving their settlements searching for opportunities throughout the world. Specifically, young people do not want to continue their tradition and culture, which directly hampers the sustainability of their community. Oppositely, tourism has been promoted in the communities to promote sustainable development and community integration. In this background, a case study of Ghalegaun tourism village, Nepal, has been conducted, and possible implications have been discussed here. In Ghalegaun, community-based activities not only for tourism perspectives but also for other purposes are directly linked to sustainable development. For example, community-based agriculture and craft-making activities, one door tourism management policy, exploration of local attractions and full utilization of the local resources, efforts towards conservation of natural resources and preservation of cultural heritages, modernized organic agriculture, and promotional activities are unique practices. From these results, the Ghalegaun model of tourism development and promotion is essential for sustainability for both developed and developing countries. For the proper resource management, attracting young people to follow the culture and tradition, conserve and preserve the local heritage, tourism development is one of the keywords.
Many species from microbes, animals, and plants have biochemical systems that generate circadian rhythms. Those systems are largely classified into two groups, clock-type and hourglass-type; the former and the latter do and do not, respectively, generate rhythms under constant light exposure and/or constant darkness. Our theoretical model predicted that species distributed in temperate and tropical zones do and do not, respectively, require a clock-type system. Global-scale studies on microbes revealed that cyanobacterial species have evolutionarily altered their ancestral clock into an hourglass. Hypothesizing that some of tropical plants also have hourglasses, we are measuring rhythms of multiple tropical plant species.