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DocumentOther documentThe interaction between particulate matter (PM) adsorption and leaf gas exchange characteristics of urban trees exposed to fly ash
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Because of their vast surface distribution, external particle reactivity, and leaf characteristics, urban trees can contribute as biofilters, reducing PM pollution. Leaves of trees permit PM to be accumulated, depending on their leaf traits. The impacts of several leaf characteristics on PM accumulation capabilities, such as surface roughness and leaf morphology, have been studied. The change in relative humidity (RH) caused by leaf gas exchanges of urban trees also can be highly related to the removal efficiency of PM because the hygroscopic growth of particle is closely related to PM deposition. Nevertheless, the impacts of leaf gas exchange parameters including stomatal conductance and transpiration rate on PM deposition ability still remain unidentified. The effects of PM pollution on urban plants’ photosynthesis are also not well understood. In this study, we analyzed the correlation between PM accumulation and photosynthesis (Pn), stomatal conductance (gs) and transpiration (Tr) of all the tested urban trees under approximately 300 μg/m3 of fly ash emitted condition and evaluated the increased effect of leaf gas exchange parameters on PM deposition. We also studied whether the inhibiting impacts on the ability of leaf gas exchange is occurred by the blockage and closure of the stomata by using scanning electron microscopy (SEM). The purpose of our research was to better understand the interaction between particulate matter (PM) adsorption and leaf gas exchange characteristics of urban trees. Furthermore, the findings of this study can be used to provide scientific data about the suitability of tree species for urban forests. Keywords: Research, Climate change, Sustainable forest management ID: 3623026 -
DocumentOther documentA preliminary study regarding changes in psychological, cognitive and physical functions through participation in forest therapy programs for dementia prevention of the elderly
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Since it is difficult to cure dementia completely, the effort of preventing and managing the occurrence is primordial. Along with non-pharmacological treatment, there is growing interests in the healing method applying a variety of forest therapy factors. For the programs, 30 participants aged from 60-80 were selected and they were divided into an experimental group (20 people) and a control group (10 people). The experimental group took part in the forest therapy programs of six nights and seven days, while the control group led a normal life without involvement in the programs. The study carried out tests twice before and after participation in the programs, such as a psychological index test (anxiety, depression, quality of life), a cognition index test (CERAD-K, CANTAB), and a biomarker test (cortisol, infection index, melatonin, heart rate variability, blood pressure). The test results of psychological index of the experimental group manifested effectiveness in that the anxiety scale significantly reduced, while the scale of quality of life showed statistical significance in three categories. According to the cognition index test, subordinate three categories significantly improved in CANTAB. Statistical significance was observed in autonomic nervous system activity regarding heart rate variability, and in systolic blood pressure regarding blood pressure. According to the CERAD-K test studying the difference between the two groups (experimental group vs control group), significant changes between the two groups were observed in the categories of path making B and constructional praxis. The main study that will be conducted in the future will inquire about the medical and scientific effects of forest therapy through a variety of research designs in the long term, and it is expected that the future study will serve as an alternative to prevention of dementia. Keywords: Human health and well-being ID: 3479125 -
DocumentOther documentHigh-biobased-content UV-curable oligomers derived from tung oil and citric acid: Microwave-assisted synthesis and properties
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Ultraviolet (UV)-curing technique has been widely applied in modern industrial areas such as coatings, inks, and adhesives due to their “5E” advantages, i.e. efficient, energy saving, enabling, economical, and eco-friendly. However, due to the dramatic fluctuation of oil prices, greenhouse effect from CO2 emission, and serious environmental problems, much efforts have been devoted into the preparation of UV-curable materials from renewable resources such as carbohydrates, plant oils, and rosins.
In this study, two novel UV-curable oligomers (TMCG1 and TMCG2) from tung oil and citric acid were synthesized via microwave technology and confirmed by FT-IR,1H NMR, and 13C NMR. The total reaction time was only 30 min, and the obtained oligomers showed high biobased contents (over 60%). Furthermore, a series of UV-curable coatings were constructed by copolymerizing the oligomers with a biobased reactive diluent (GA) from guaiacol. The resulting UV-cured materials achieved both high biobased content and high performance. For instance, the cured TMCG1 film with 10% of GA showed a biobased content of 72.4%, tensile strength of 16.6 MPa, glass transition temperature of 74.1 oC, maximum thermal degradation temperature of 437.2 oC, adhesion of 2 grade, pencil harness of 2H, and flexibility of 2 mm.
In general, the biobased UV-curable coatings show great potential to be applied in the fields of coatings like wood coatings, and the combination of bioresources, microwave technology, and UV-curing technology indicated in this work could provide a “green + green + green” solution for the coating industry. Keywords: Agriculture, Economic Development, Education, Research, Innovation ID: 3483375
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Book (stand-alone)Technical book打造可持续的粮食体系
创新者手册
2022可持续的粮食体系对于保障子孙后代的粮食安全和饮食健康至关重要。要实现可持续性转型，必须重构众多粮食体系活动，全球各地无数主体正在开展行动。尽管有些转变相对容易，但是要通过转变来推广可持续的消费和生产模式，依旧需要复杂的综合技能。本书面向“可持续的粮食体系创新者”，来自亚洲、非洲、美洲、欧洲的创新人士，他们正领导众多倡议，根据实际情况种植、分享、销售、消费更可持续的食品。本书涵盖的众多实践正通过改变地方粮食体系的组织架构，来提升粮食体系的可持续性。本书按照“选择你自己的冒险故事”的方式来编排，让每位读者，不论是自己读还是跟着互助小组一起读，都能够根据需求定制个性化的学习和行动旅程。本书包含四大创新主题：留住消费者、可持续生产、产品入市和组织有序。 -
Book (series)FlagshipThe State of Food and Agriculture 2019
Moving forward on food loss and waste reduction
2019The need to reduce food loss and waste is firmly embedded in the 2030 Agenda for Sustainable Development. Food loss and waste reduction is considered important for improving food security and nutrition, promoting environmental sustainability and lowering production costs. However, efforts to reduce food loss and waste will only be effective if informed by a solid understanding of the problem. This report provides new estimates of the percentage of the world’s food lost from production up to the retail level. The report also finds a vast diversity in existing estimates of losses, even for the same commodities and for the same stages in the supply chain. Clearly identifying and understanding critical loss points in specific supply chains – where considerable potential exists for reducing food losses – is crucial to deciding on appropriate measures. The report provides some guiding principles for interventions based on the objectives being pursued through food loss and waste reductions, be they in improved economic efficiency, food security and nutrition, or environmental sustainability. -
Book (stand-alone)Manual / guideProcessing of fresh-cut tropical fruits and vegetables: A technical guide 2010
Also available in:
No results found.There has been a marked upward trend in production and consumption of fruits and vegetables in Asia and the Pacific in recent years. Along with rising consumer demand has come greater awareness of food safety issues and increased need for convenience and quality. Selection of high quality horticultural produce for processing and implementation of good practices during processing operations are required to assure both the quality of the produce and the safety of the final product. This technical guide reviews, from a theoretical and practical perspective, the critical issues that must be addressed for fresh-cut produce to meet consumer demand for convenience, quality and safety. A case study on fresh-cut processing in Thailand is included. The guide should be of practical value to small processors, trainers and extension workers who provide support to individuals engaged in production of fresh-cut tropical produce for sale.