Polycyclic aromatic hydrocarbons are a group of important organic pollutants and should be concerned. General sources of PAHs are contamination of petroleum hydrocarbons and incomplete combusion of organic compounds. The recalcitrance of these compounds depends on the arrangment of benzene rings and their molecular weight. Besides they are carcinogenic and mutagenic to animals PAHs show several toxicity to plant such as decreasing shoot and root growth and photosynthetic rate. PAHs are toxic to plant at molecular level such as increasing oxidation pressure and decreasing gene expression of cell wall-loosening protein expansion. Photooxidized PAHs showed higher toxicity to plant than parent compounds. Plant species and some environmental factors such as soil pH affect to PAHs phytotoxicity. Phytotoxiciy of Polycyclic aromatic hydrocarbons to crop plant growing in Polycyclic aromatic hydrocarboncontaminated soil is an important environmental concern

The goal of this study is to study the cost of safety system in building construction by studying multipurpose building with durable goods project. The cost of safety system in building construction is divided into two categories are the safety measure cost and the safety program cost in construction. From the study it is found out that the value of safety measure cost is approximately 1.85 % of a project cost and the value of safety program cost is approximately 0.98 % of a project cost. To sum up the cost of safety system in building construction is approximately 2.83 % of a project cost .Moreover the study found out that the safety measure cost is higher than the safety program cost about 1.88 as much. From the data of this study it can be used as the guideline in estimating the cost of safety system in building construction for the future project.

The purposes of this study were t~ investigate the influence of color psychology on low vision people affecting product design and to conclude color psychology applied for low vision people. The study comprised five points. First point was to study what colors that people with low vision could see clearest by ranking. Second point was to study what they liked the most colors. Third point was to study what complementary colors that they could see the clearest color by ranking. Fourth point was to study how the sample groups felt about colors. And fifth point was to study that they could distinguish strength or weakness in a color (intensity). The instruments used in data collection were the questionnaires and set of stimulated color charts which utilized as stimuli to induce answers from respondents in the surveying process.

Ceramics Porduct Develompnet Ceramics

The objective of this study were to use of RAPD technique for identification of Krachai ecotype in Thailand. DNA from 36 sample of Krachai that collected from every part of Thailand are amplified by 10 primer and relation analysis by UPMGA. This study was conducted at Faculty of Agriculture at Bangpra Sriracha Chonburi. The results showed every primer can made different pattern. After comparison of RAPD pattern from each sample can divide into 2 groups. However every sample is closely genetic relation likes it came from same original.