関係者各位
沿岸環境科学研究センター
化学汚染・沿岸環境研究拠点（LaMer）
拠点長 岩田 久人
沿岸環境科学研究センター（ＣＭＥＳ）、共同利用・共同研究拠点「化学汚染・沿岸環境研究拠点（ＬａＭｅｒ）」プロジェクトの一環として、下記の要領で第３７回特別講演会を行うこととなりました。今回は３名の方にご講演いただきます。
聴講は無料・事前申し込み不要です。多くの皆様のご参加をお待ちしております。
記
【日 時】２０２０年１月９日（木） 午前１０時３０分～１２時
Thursday, January 9th, 2020 10:30 – 12:00 a.m.
【場 所】愛媛大学 理学部講義棟 Ｓ２２
S22, Lecture Building, Faculty of Science, Ehime University
■Lecturer: Prof. Maricar S. Prudente
De La Salle University, Philippines
■Title: Environmental Studies on Climate Change Education and Ubiquitous
Distribution of Persistent Toxic Substances: Perspectives from the
Philippines
■Abstract: For the last three years, we were involved on two environment-related
collaborative studies namely: (1) effective climate change education
through school-wide initiatives, digital literacy, and ethics
education ; and (2) detection of artificial sweeteners and X-ray
contrast media in aquatic environmental and wastewater treatment plant
samples from Vietnam, the Philippines, and Myanmar. The first project
is a collaborative educational action research project that brings
together middle-school students from the United States and the
Philippines to gather and share the results of research on how climate
change affects their local communities, and to model ways in which
schools can respond to these environmental challenges by empowering
students to take an active role in implementing change in their own
classrooms and communities. While for the second project, wastewater
samples from the Philippines were analyzed for artificial sweeteners
(ASs) and iodinated X-ray contrast media (ICMs). High acesulfame,
cyclamate, saccharin, and sucralose concentrations were found in
surface water from Manila, the Philippines. The sucralose
concentrations were one order of magnitude higher in the Manila
samples than in the Vietnamese samples, indicating that more sucralose
is used in The Philippines than in Vietnam. Acesulfame and cyclamate
were found in surface water from Pathein (rural) and Yangon (urban)
in Myanmar, but no ICMs were found in the samples. The ASs
concentrations were two-three orders of magnitude lower in the samples
from Myanmar than in the samples from Vietnam and the Philippines,
suggesting that different amounts of ASs are used in these countries.
This second study is the first report of persistent ASs and ICMs having
ubiquitous distributions in economically emerging South Asian countries.
■Lecturer: Ms. Karina L. Damo
Mariano Marcos State University, Philippines
■Title: Phytochemical, Toxicologic Profiling and Anti-inflammatory Activity of
Indigenous Medicinal Plants
■Abstract: As a staff of the Tuklas Lunas Development Center for Luzon, Philippines,
I was involved on a 5-year research project on modulatory role of
indigenous medicinal plants identified in Ilocos Norte, Philippines in
acute and chronic inflammatory diseases. Part of the project involves a
study on phytochemical, toxicologic profiling and anti-inflammatory
activity of the identified indigenous medicinal plants. The presence of
secondary metabolites was investigated. In-vitro toxicity testing was
done using MTT assay. The anti-inflammatory testing was done using
carrageenan-induced paw edema assay. To test the safety of the 46 plant
species, heavy metal content and pesticide residues were investigated.
Safety analyses include the use of pesticide kit developed by UPLB to
test for the presence of carbamates and organophosphates. Colorimetric
method was used to determine the presence of lead, mercury and silver.
Collection sites were recorded for possible source of contaminants.
Results showed that the 46 indigenous food plants were negative in heavy
metals and pesticide residues indicating that the collection sites were
not contaminated by toxic substance and thus can be viable sources of
plants. However, seven out of 46 plant species showed a significant
increase in absorbance when reacted with hydrochloric acid. Based on
qualitative analysis, four samples were subjected to cytotoxicity and
anti-inflammatory tests. Cytotoxic compounds may be present in four
extracts of indigenous food plants that can induce cytotoxicity. Of the
four extracts, D. philippinensis showed the highest edema inhibition.
■Lecturer: Dr. Rodney T. Cajimat
De La Salle University, Philippines
■Title: Spatial Patterns of Epiphytic Lichens in a First Class Municipality: A Basis
for an Index of Atmospheric Purity in the Philippines
■Abstract: Lichens are sensitive epiphytes known for their medicinal and ecological
importance. Lichens are also being investigated for their potential as
bioindicators of environmental changes or disturbances, e.g., atmospheric
impurities. This study utilized the Quantum Geographic Information System
(QGIS) technology to develop contour maps from interpolated data points
based on the patterns of lichen distribution, size and abundance, with
respect to the temperature and atmospheric pressure of the areas. The
survey areas were identified using the OpenLayer Plug-in and
Assisted-Global Positioning System (A-GPS). Physical factors on altitude
and pressure were identified using A-GPS and barometer. The abundance and
size of lichens on different tree substrates were gathered using the quadrat
segment method. With QGIS, data points were interpolated, data were
statistically analyzed, and contour maps were developed. Findings of the
study revealed that lichens were found in all of the surveyed areas in the
municipality. Although relationship of lichen size and abundance with
pressure and altitude showed no significance, large lichens can be seen in
the western part of the municipality and abundant lichens can be observed
in the northern areas. On the other hand, the relationship of lichen size
and abundance were inversely proportional. Larger lichens appeared to be
present in areas where lichen abundance was less; on the contrary, lichens
were abundant in areas where lichens were observed to be smaller. As a
preliminary survey, the generated contour maps can be used by future
researchers to identify possible areas where physiologic characteristics of
the lichens might have been potentially affected by environmental stress.
And to investigate further the underlying causes of lichen differences in
terms of their significant physiologic response to environmental stress
like atmospheric pollutants, derivatives or impurities. The next study must
involve intensive physico-chemical analysis of lichens and the area to
which they are thriving to establish an index correlating lichen physiology
and atmospheric impurities.
■Language: English
■No advanced registration, no fee for attending.
以上
ご不明な点は、下記までお問い合わせください。
化学汚染・沿岸環境研究拠点
（Leading Academia in Marine and Environment Pollution Research）
Email: lamer@stu.ehime-u.ac.jp