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This study aims to synthesize carbon dots from a natural resource and will be used to detect a latent fingerprint on a non-porous surface. The carbon dots (CDs) were prepared by adding luminol to coconut water and ethanol via a hydrothermal method. Luminol enhances the chemiluminescence of the CDs, which show more distinct blue light under a UV lamp compared with bare CDs. To detect the latent fingerprint, luminol carbon dots (N-CDs) were combined with commercial starch and stirred at room temperature for 24 h. Their characteristics and optical properties were measured using EDX-SEM, HR-TEM, FTIR, XPS, UV–visible absorption, and fluorescence. In this research, it was found that the N-CDs had a d-spacing of 0.5 nm and a size of 12.9 nm. The N-CDs had a fluorescence intensity 551% higher than the standard normally used. N-CDs can be used to detect latent fingerprints on a non-porous surface and are easy to detect under a UV lamp at 395 nm. Therefore, luminol has a high potential to increase sensitive and stable traces of chemiluminescence from the green CDs for forensic latent fingerprint detection.

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This research was to study the preparation of fluorescent dust powder to enhance the detection of ultra-bright latent fingerprints using natural plant extract associated with adsorption on silica gel particles by a simple and cheap method environmentally friendly. To study the physical and chemical properties of the fluorescent powder, various factors affecting the latent fingerprints detection including different surface characteristics, temperature, time, and overlapping passive fingerprints were investigated. From the results, it was found that the fingerprints on the surface of different materials could be performed, and gave good inspection trace,which can be seen with naked eye and appear brightly under UV light at a wavelength of 366 nm. For the persistence study of the latent fingerprints, it was also found that when kept it in a dark place at room temperature for 30 days, the fingerprints were still visible to the naked eye and glow clearly under UV light.In addition, the overlapping fingerprints can be clearly identified. Therefore, the study of the fluorescent silica gel dust powder demonstrates good performance,and it is a potential use to detect latent fingerprints as a witness in forensic processes.

Dansai District is located in Loei Province, Northeast Thailand, rich in natural resources and composes of many kinds of forests, such as evergreen forests and mixeddeciduous forests. The objectives of the study are to determine the diversity of mushrooms and investigate the values of the forest influencing the community way of life and exploration of problems and guidelines for developing the forest along with sufficiency economy theory. The study includes compilation of data from past studies, semi-structured interview with the local communities and discussion with focus group. The survey was done once a month during the rainy season from May to August in 2012 and 2013. The results of the survey revealed 56 species belonging to 26 families, 38 genera. A total of 52 mushroom species belong to Basidiomycota, while 4 species belong to Ascomycota. The community forest remains fertile due to the conservation effort by the community leaders and a group of villagers. A community forestry board were set up to conserve the forest and proposed to the government at Dansai Vocational Community College to officially declare the forest as a formal community forest. The conservation management relied upon the kinship relations, seniority, and religious belief along with the enforcing authorities. If an encroacher is found, he would be fined according to the regulations and defamed publicly. However, encroachment still exists. In general, community forest is valuable and directly affected the villagers' ways of life in which they could generate income from the forest, particularly reducing the daily expenses and promoting their sociocultural perspective.

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