จำนวน Repository ( 19 )
การเตรียมสีผงจากสีย้อมธรรมชาติ
The preparation of dye powder from natural dyes is to study the preparation methods of dye powder and comparison of color fastness. The natural dyes were used in this study containing of Lac Ebony heart wood Sappan heart wood and Turmeric. were selected in this work to prepare dye powder drying salt adsorption and salt precipitation methods were selected in this work. And dye powder was dyed on silk fabric. The result showed that the dye powder from drying and salt precipitation methods showed higher K/S than salt adsorption method. The dye powder of turmeric from drying method showed highest K/S. The dye powders of Lac Ebony heart wood Sappan heart wood from salt precipitation method showed highest K/S. And the washing fastness showed that the preparation methods were not significant. The dye powder of Lac Ebony heart wood Sappan heart wood showed good light fastness and the dye powder from Turmeric showed poor light fastness.
การเตรียมและศึกษาสมบัติทางโครงสร้างและแม่เหล็กของอนุภาคคอมโพสิตระดับนาโนเมตรของไฮดรอกซีอะพาไทต์และซิงก์เฟอไรท์ เพื่อประยุกต์ใช้ในการรักษามะเร็งในอนาคต
A promising composite of zinc ferrite (ZnFe2O4) and bioactive hydroxyapatite (Ca10(PO4)6(OH)2 ;HAp) has expected to potential for future bone reinforcing formation. In present study zinc ferrite and hydroxyapatite composite was prepared by solid state reaction route for easier control of structural and magnetic characteristics and with low cost. Hydroxyapatite powder was synthesized by precipitation method from chicken eggshell. Mixed powders with varying ZnFe2O4/HAp weight ratios from 2-10 wt% were milled together and uniaxially pressed and then sintered at 1200 oC for 3 hours. The XRD results showing no other phases of composite with only HAp and ZnFe2O4 phases were identified indicating high stability of HAp property. Phase fractions of ZnFe2O4 were found to increase from 10.8 to 18.73 wt% with increasing content of ZnFe2O4. FT-IR results of ZnFe2O4/HAp composite were only revealed vibration bands of standard HAp phase. This may due to the overlapping of the ZnFe2O4 vibrational bands with HAp bands. However their intense variations observed in HAp vibrational bands indicated the interaction between ZnFe2O4 and HAp. The surface morphology of these ZnFe2O4/HAp composite exhibited primary grain in nano scale with enhanced pore structure and Interconnectivity when ZnFe2O4 weight ratios increased; indicating high surface area for cell attachment and better good cell growth and differentiation. The higher saturation magnetization as well as higher super paramagnetic behavior could be easily altered by increasing ZnFe2O4 content in the composite.
การเตรียมและการวิเคราะห์แก้วและแก้วเซรามิกชีวภาพจากระบบแคลเซียมโซเดียมฟอสเฟต
The aim of this work was to study the magnetic properties of magnetic glassceramics with composition system CaO-Na2O-P2O5-BaO-Fe2O3. The magnetic glass– ceramics were prepared by conventional melting at 1300oC for 2 h of the coprecipitation derived starting products and heat treated at different temperatures. The structure and microstructure of the samples were characterized by X-ray diffraction energy dispersive X-ray analysis (EDXA) and scanning electron microscopy. The magnetic measurement showed that the samples which contained barium ferrite exhibited magnetic behavior which is similar to soft magnetic materials. Finally the samples were soaked in simulated body fluid (SBF) for 14 days. The apatite was found to form on the surface layer of glass-ceramics and it increases with the barium ferrite content was increased.
การรับรู้ การเตรียมความพร้อมด้านทักษะวิชาชีพในการก้าวสู่ประชาคมอาเซียน กรณีศึกษา : นักศึกษาระดับปริญญาตรีปีที่1 สาขาอุตสาหกรรมการบริการอาหาร
Thailand has become a member of the Association of South East Asian Nations (ASEAN) which aims to stimulate economic growth social progress sociocultural evolution and also cooperation among its members. The main goal of ASEAN Economic Community (AEC) is to transform the region into a single market and production base to become more stable and prosperous. Hence in order to prepare ourselves to the changes in a very near future it is essential to encourage and support students to improve their working skills and knowledge to enter the ASEAN community confidently. In order to examine on the acknowledgement and the preparation in terms of working skill for ASEAN undergraduate students in the first year of Food Service Industry Program were chosen by using purposive sampling. Fifty-five questionnaires were collected. The result shows that most of the students at 75.47 percent are female 52.83 percent of them are eighteen years old and 43.39 percent use internet regularly. The evaluation on students’ knowledge capability and working experience which are considered to be beneficial for entering the ASEAN community shows that most of the students are very well prepared in both personality and potential. Moreover the majority are also very well educated about ASEAN in terms of economic growth social progress sociocultural evolution. The research also analyzed on the differences on gender of the students and channel of the resources about ASEAN that may have an impact on their knowledge and potential. The result shows that there are no significant differences between each gender and channel (P ≤ 0.05).
ศึกษาผลของโปรแกรมการเตรียมตัวสู่โลกแห่งอาชีพเพื่อเพิ่มความพร้อมในการสมัครงาน ของนักศึกษาชั้นปีที่ 3 คณะศิลปศาสตร์ มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร
The purpose of this study was studied the Effects of the Job Preparation Program to Enhance Readiness for Job Application of third year students in Rajamangala University of Technology Phra Nakhon. The sample consisted of 30 third-year students in Rajamangala University of Technology Phra Nakhon second semester academic year 2013 whose scores on the Readiness for Job Application questionnaire were below the 75th percentile and voluntarily participated in the Job Preparation Program . The sample was randomly assigned to form the control and the experimental groups 15 students in each group. The instruments used in this study were: 1. the Job Preparation Program 2. Job Readiness for Job Application questionnaire 3. Student’s opinions towards Job Preparation Program. Statistical techniques used to analyze data were mean standard deviation t-test. The findings revealed that: 1) Scores on Readiness for Job Application questionnaire of the experimental group after the experiment were significantly higher than their scores before the experiment at the 0.05 level. 2) After the experiment scores on Readiness for Job Application questionnaire of the experimental group were significantly higher than those of the control group at the 0.05 level. 3) The experimental group reported that the program facilitated them in understanding their interests career personality skills aptitude job values the world of work techniques and methods for job application. Their knowledge and experiences would assist them in applying for job and further personal development.