จำนวน Repository ( 2131 )
Students' problems and needs for educational management of science and technology faculty, rajamangala university of technology
The objectives of this research were to 1) study perceived problems of students for educational management of Science and Technology Faculty Rajamangala University of Technology Phra Nakhon 2) compare perceived problems of students for educational management classified by gender students year and field of study and 3) study needs of students for educational management of Science and Technology Faculty. The sample studied were 140 undergraduate students selected by proportional stratified random sampling categorized by students year of study and simple random sampling was also used. The data was collected through questionnaires constructed by researcher. The statistics used for data analysis were mean standard deviation one way analysis of variance and Scheffes multiple comparison method.
The development of a statistical analysis for business instructional model through content integration to enhance connection skills on multiple regession analysis at undergradulate level.
The purposes of this study were to develop a model of Business Analysis in Statistics instruction through Content integration to enhance connection skills on Multiple Regression Analysis at undergraduate students of the 1 Semester academics year 2009 Rajamangala University ofTechnology Pha Nakron and to study their Business Analysis in statistics achievement being taught by using those model of Business Analysis in Statistics instruction.
The innovation construction for the toughness measurement of rice kernel with the inner pressure method
During the rice processing the possible situations of rice kernel cracking and breakage are commonly occurred and these consequences cause a low marketing price. According to this issue the real-time observation and together with the knowledge base of mechanical properties should be essentially helpful in detection of these defect observations. The objective of this work was established to study the mechanical stress-strain properties of rice kernels via our in-house pneumatic system design. We found that stress-strain of RD6 RD15 Phitsanulok 2 and Khao Dawk Mali 105 were greater than KhaoYipun DOAI with moisture content of 20% w.b. These results tentatively indicated the mechanical stress-strains occurred were from the difference of rice shapes. Moreover we could recognize that the characteristics of these various shapes significantly followed the scaling law of the relation between strain and time. We also found that the breaking force was different value for rice varieties. This parameter obtained can be such a high potential approach that can be used for further developing in the quantitative classification of rice varieties.
A novel method for measuring total antioxidant capacity and its application to monitoring the antioxidant status in Thai herbs.
A novel and simple method for measuring total antioxidant capacity or T AC in Thai herb extracts has been developed. The principle is based on generating free radical the deep blue Imipramine radical is generated by oxidizing Imipramine by ammonium tetravanadate in acid medium that can be easily scavenged by antioxidant compounds in the sample. Decreasing in the absorption spectrum at 620 nm related with antioxidant capacity was detected by spectrophotometer method in the proposed of practicable and low-cost However improvement of the throughput Flow injection analysis (FIA) was applied. The variables affecting the signal such as pH reagent concentrations linear relationship was optimized. The novel assay is linear up to 2800 mg Trolox equivalent/L its precision value is lower than 1% RSD and these are no interference from NaOH NaCI and N~C03 The method was applied for determination of three extract fractions of G. sootepensis. The results show the different of antioxidant capacity in each fraction with S I has the most TAC following S2 and S3 respectively. Although a good correlation of the present method was observed between two methods DPPH and Follin Ciocalteu reagent Finally the developed method was easy stable inexpensive environmental friendly and automated measures total antioxidant capacity.
A novel spectrophotometric method for determination of melamine
The aim of this research was to develop a novel convenient low cost environmental friendly and simply method for determination of melamine in milk samples. The chemical reaction of this method was based on the complexation of melamine aldehyde and ketone called Mannich reaction. The absorption of the product complex was recorded by spectrophotometric technique at 236 nm. The method validation was good with linear range of 0.1-2.5 ppm and the limit of detection (LOD) was 0.08 ppm. The method revealed precision with %RSD values no greater than 5%. To quantitY the amount of melamine in raw milk standard addition was applied with recoveries in a range from 76-91 %.