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Research paper thumbnail of Dust captured by a canopy and individual leaves of trees in the tropical mixed deciduous forest: Magnitude and Influencing factors

Forest tree leaves play a significant role in air purification, but forest fires could offset the... more Forest tree leaves play a significant role in air purification, but forest fires could offset the dust sink role. This study aims to assess the functions of the forest in atmospheric dust sink and source and assess the dust capturing capacity of individual leaves of various tree species in the tropical mixed deciduous forest in the dry season (24 November 2021 to 23 January 2022), along with its influencing factors—climatic variables, environmental variables, and leaf morphology. The result shows that the downward flux or the forest dust sink role was predominant at the midday when air-mass turbulence played a role. Nonetheless, net mass PM1 and PM10 concentration trapped by the forest canopy was low, 0.79 and 2.24 µg m− 3, respectively. Forest fires as PM2.5 sources to the atmosphere could outrun the PM2.5 sink role for entire of the dry season. Considering the individual tree leave, maximum dust capturing capacities for the forest trees ranged from 0.95 g m− 2 to 5.197 g m− 2. Lea...

Research paper thumbnail of Quantifying Avoidable Food Waste and Identifying Its Underlying Causes: A Case Study of a University Dormitory in Thailand

Applied Environmental Research, 2021

To develop well-planned and effective policies and programs for reducing avoidable food waste, it... more To develop well-planned and effective policies and programs for reducing avoidable food waste, it is important to quantify the actual food waste level in particular settings and assess relationships among consumers’ awareness, attitudes, and behaviors. Recognizing these considerations, this paper measured avoidable food waste generated by university students living in dormitory buildings and identified its underlying causes in the case of Kanchanaburi campus, Mahidol University, Thailand. The study applied a food waste composition survey 18 times between January and May 2019 while administering questionnaires in October 2019 to the dormitory students. Based on these measures, the study identified 1,417 instances of avoidable food waste. Approximately half of the avoidable food waste had not even been eaten. Most of this waste was generated by female students. Some factors in terms of motivation, opportunity, and ability using a Motivation, Opportunity, Ability framework were found t...

Research paper thumbnail of Food and nutrition of Gaur (Bos gaurus C.H. Smith, 1827) at the edge of Khao Yai National Park, Thailand

Scientific Reports

The presence of gaur (Bos gaurus) at the border of Khao Yai National Park (KYNP) in Thailand has ... more The presence of gaur (Bos gaurus) at the border of Khao Yai National Park (KYNP) in Thailand has resulted in a dramatic increase in the number of individuals’ crop feeding. This study examines the feeding adaptations of gaur at the edge of the protected area and assesses whether gaur response to increased nutrient availability in crop plants compared to natural forage. During the day, gaur mostly utilized forest areas in KYNP and entered the agricultural areas at night. Gaur ate 43 natural forage species. Natural forage species contain high levels of crude protein and lipid, but they are found in small quantities and scattered areas when compared to crop plants, especially Zea mays L., that are available in large quantity and are heavily foraged on by gaur. However, greater understanding of the electivity index and nutrition of forage species along the edge of the protected area can be used to reduce the gaur-human conflict by keeping gaur in KYNP. Reducing the large monoculture are...

Research paper thumbnail of Cytogenetic study of the Bent-toed Gecko (Reptilia, Gekkonidae) in Thailand; I: Chromosomal classical features and NORs characterization of Cyrtodactylus kunyai and C. interdigitalis

This study analysed the karyotype of Cyrtodactylus kunyai and C. interdigitalis from Loei Provinc... more This study analysed the karyotype of Cyrtodactylus kunyai and C. interdigitalis from Loei Province in Northeastern Thailand. The metaphase and meiotic chromosome preparations were obtained by squash technique from bone marrow and testes, respectively. The chromosomes were stained by Giemsa staining and Ag-NOR-banding techniques. The results showed diploid chromosome number (2n) of 40 for C. kunyai and 42 for C. interdigitalis. The chromosome types of metacentric, submetacentric, acrocentric and telocentric chromosomes were 8-4-0-28 and 4-2-4-32, respectively. The Ag-NORs banding technique provides the pair of nucleolar organizer regions (NORs) of both two species at telomeric region of the long arm of the pair 12, metacentric type in C. kunyai and telocentric type in C. interdigitalis. There are no sex differences in karyotypes between males and females of both two species. We found that during metaphase I on meiosis of C. kunyai and C. interdigitalis, the homologous chromosomes sho...

Research paper thumbnail of Cytogenetics of the Skinks (Reptilia, Scincidae) from Thailand; I: Chromosome Analyses of the Common Sun Skink (Eutropis multifasciata)

CYTOLOGIA, 2014

Chromosomal analyses of the common sun skink (Eutropis multifasciata) from mitotic and meiotic ce... more Chromosomal analyses of the common sun skink (Eutropis multifasciata) from mitotic and meiotic cell divisions were studied. Blood samples were taken from five male and five female skinks. Skink chromosome preparations were conducted by the squash technique from the bone marrow and testis. The chromosomes were stained by conventional staining and Ag-NOR banding techniques. The results showed that the diploid chromosome number of E. multifasciata was 2n=32, the fundamental number (NF) was 48 in both males and females. The types of chromosomes were present as 6 large metacentric, 2 large submetacentric, 6 small metacentric, 2 small submetacentric, 2 small telocentric macrochromosomes and 14 microchromosomes. There was no irregularly sized chromosome related to sex. We also observed distinctive nucleolar organizer regions (NORs) at the region adjacent to the short arms near the telomere of a pair of the largest metacentric chromosomes. We found that during diakinesis (prophase I) the homologous chromosomes showed synapsis, which can be defined as the 16 bivalents and 16 haploid chromosomes at metaphase II as diploid species. The karyotype formula of E. multifasciata is as stated: 2n (diploid) 32=L 6 m

Research paper thumbnail of Dust captured by a canopy and individual leaves of trees in the tropical mixed deciduous forest: Magnitude and Influencing factors

Forest tree leaves play a significant role in air purification, but forest fires could offset the... more Forest tree leaves play a significant role in air purification, but forest fires could offset the dust sink role. This study aims to assess the functions of the forest in atmospheric dust sink and source and assess the dust capturing capacity of individual leaves of various tree species in the tropical mixed deciduous forest in the dry season (24 November 2021 to 23 January 2022), along with its influencing factors—climatic variables, environmental variables, and leaf morphology. The result shows that the downward flux or the forest dust sink role was predominant at the midday when air-mass turbulence played a role. Nonetheless, net mass PM1 and PM10 concentration trapped by the forest canopy was low, 0.79 and 2.24 µg m− 3, respectively. Forest fires as PM2.5 sources to the atmosphere could outrun the PM2.5 sink role for entire of the dry season. Considering the individual tree leave, maximum dust capturing capacities for the forest trees ranged from 0.95 g m− 2 to 5.197 g m− 2. Lea...

Research paper thumbnail of Quantifying Avoidable Food Waste and Identifying Its Underlying Causes: A Case Study of a University Dormitory in Thailand

Applied Environmental Research, 2021

To develop well-planned and effective policies and programs for reducing avoidable food waste, it... more To develop well-planned and effective policies and programs for reducing avoidable food waste, it is important to quantify the actual food waste level in particular settings and assess relationships among consumers’ awareness, attitudes, and behaviors. Recognizing these considerations, this paper measured avoidable food waste generated by university students living in dormitory buildings and identified its underlying causes in the case of Kanchanaburi campus, Mahidol University, Thailand. The study applied a food waste composition survey 18 times between January and May 2019 while administering questionnaires in October 2019 to the dormitory students. Based on these measures, the study identified 1,417 instances of avoidable food waste. Approximately half of the avoidable food waste had not even been eaten. Most of this waste was generated by female students. Some factors in terms of motivation, opportunity, and ability using a Motivation, Opportunity, Ability framework were found t...

Research paper thumbnail of Food and nutrition of Gaur (Bos gaurus C.H. Smith, 1827) at the edge of Khao Yai National Park, Thailand

Scientific Reports

The presence of gaur (Bos gaurus) at the border of Khao Yai National Park (KYNP) in Thailand has ... more The presence of gaur (Bos gaurus) at the border of Khao Yai National Park (KYNP) in Thailand has resulted in a dramatic increase in the number of individuals’ crop feeding. This study examines the feeding adaptations of gaur at the edge of the protected area and assesses whether gaur response to increased nutrient availability in crop plants compared to natural forage. During the day, gaur mostly utilized forest areas in KYNP and entered the agricultural areas at night. Gaur ate 43 natural forage species. Natural forage species contain high levels of crude protein and lipid, but they are found in small quantities and scattered areas when compared to crop plants, especially Zea mays L., that are available in large quantity and are heavily foraged on by gaur. However, greater understanding of the electivity index and nutrition of forage species along the edge of the protected area can be used to reduce the gaur-human conflict by keeping gaur in KYNP. Reducing the large monoculture are...

Research paper thumbnail of Cytogenetic study of the Bent-toed Gecko (Reptilia, Gekkonidae) in Thailand; I: Chromosomal classical features and NORs characterization of Cyrtodactylus kunyai and C. interdigitalis

This study analysed the karyotype of Cyrtodactylus kunyai and C. interdigitalis from Loei Provinc... more This study analysed the karyotype of Cyrtodactylus kunyai and C. interdigitalis from Loei Province in Northeastern Thailand. The metaphase and meiotic chromosome preparations were obtained by squash technique from bone marrow and testes, respectively. The chromosomes were stained by Giemsa staining and Ag-NOR-banding techniques. The results showed diploid chromosome number (2n) of 40 for C. kunyai and 42 for C. interdigitalis. The chromosome types of metacentric, submetacentric, acrocentric and telocentric chromosomes were 8-4-0-28 and 4-2-4-32, respectively. The Ag-NORs banding technique provides the pair of nucleolar organizer regions (NORs) of both two species at telomeric region of the long arm of the pair 12, metacentric type in C. kunyai and telocentric type in C. interdigitalis. There are no sex differences in karyotypes between males and females of both two species. We found that during metaphase I on meiosis of C. kunyai and C. interdigitalis, the homologous chromosomes sho...

Research paper thumbnail of Cytogenetics of the Skinks (Reptilia, Scincidae) from Thailand; I: Chromosome Analyses of the Common Sun Skink (Eutropis multifasciata)

CYTOLOGIA, 2014

Chromosomal analyses of the common sun skink (Eutropis multifasciata) from mitotic and meiotic ce... more Chromosomal analyses of the common sun skink (Eutropis multifasciata) from mitotic and meiotic cell divisions were studied. Blood samples were taken from five male and five female skinks. Skink chromosome preparations were conducted by the squash technique from the bone marrow and testis. The chromosomes were stained by conventional staining and Ag-NOR banding techniques. The results showed that the diploid chromosome number of E. multifasciata was 2n=32, the fundamental number (NF) was 48 in both males and females. The types of chromosomes were present as 6 large metacentric, 2 large submetacentric, 6 small metacentric, 2 small submetacentric, 2 small telocentric macrochromosomes and 14 microchromosomes. There was no irregularly sized chromosome related to sex. We also observed distinctive nucleolar organizer regions (NORs) at the region adjacent to the short arms near the telomere of a pair of the largest metacentric chromosomes. We found that during diakinesis (prophase I) the homologous chromosomes showed synapsis, which can be defined as the 16 bivalents and 16 haploid chromosomes at metaphase II as diploid species. The karyotype formula of E. multifasciata is as stated: 2n (diploid) 32=L 6 m