จำนวน Repository ( 166 )

เครื่องดื่มน้ำนมถั่วเหลืองผสมน้ำแครอท
เครื่องดื่มน้ำนมถั่วเหลืองผสมน้ำแครอท

The purposes of the research on soy milk product mixed with carrot were to study the preparation of soy milk carrot juice extraction appropriate ratio of soy milk to carrot juice and sugar content shelf - life and consumers’ acceptance of the product. The study was focused on the product’s physical quality chemical composition sensory quality and micro-organism content. The results of the research revealed that soy milk with soy bean : water at 1:4 (by dry soy bean weight)used in extraction process; blanching of carrot prior to extracting which yields 70.31% of the juice and 4580 μg . (763.33 R.E) beta - carotene per 100 grams of carrot which is a higher amount than extracting fresh carrot ; the ratio of soy milk to carrot juice at 70:30 and 5% of sugar content by weight are appropriate in soy milk mixed with carrot production. The L*value a*value and b* value were 66.79 25.24 and 39.25 respectively. The viscosity was 17.33 centipoint; total soluble solid was 11.67 brix; and pH was 6.25. The acceptance scores on color flavour texture and overall preference were 7.98 8.00 7.93 and 8.05. This means preference on color and texture was moderate; the preference on flavour and texture was very high. For chemical composition it was found that there were 71.08 kcal. energy 4.40 g. protein 1.56 g. fat 9.86 g. carbohydrate and 1378 μg.(229.67 R.E.) beta-carotene per 100 grams. The cost of raw materials was 6.41 baht per 180 ml./bottle. The study of consumers’ product acceptance showed that most consumers had knowledge on nutrition; they accepted and had preference on the product at the moderate level. The price of 12.00 baht per 180 ml. bottle was accepted. It was also found that there was no physical or chemical change of the product when kept at 70C for 14 days. Total bacterial count was 4.8x10 CFU/cm3 when compared to Soy Milk Thai Community Product Standard (SPC. 529/2004) which specified that not exceeding 1x104 CFU/ cm3 should be found in the product. It was evident that the product was still safe for consumption when kept for 14 days.

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การลอกกาวไหมด้วยยางมะละกอ
การลอกกาวไหมด้วยยางมะละกอ

Degumming process is a fundamental process for silk yam and silk fabric finishing. The main objective is scouring the substrate such as silk gum (sericin) wax and fatty acid from silk fiber. The principle of degumming process is destroying the peptide linkage of amino acid in sericin structure into a small molecule which is soluble in water. The hydrolysis reaction performed by acid alkaline enzyme surfactant as soap and high pressure steam process. The conventional methods favor degumming with soap and sodium carbonate. This process has a problem on the surface area of silk. Proteolytic enzymes can answer this problem but it seldom use because of a specific condition and high cost. For this reason the insteading of papain enzyme from dry latex of Carica payapa Linn. was decided to use for silk degumming at any condition study. This research was concerned with the silk degumming using papain enzyme form dry latex of Carica payapa Linn. The degumming process was performed at the temperature vary from 55 -85 degree Celsius time fromlO to 40 minutes and the amount of dry latex ranging from 0 to 4% owf in order to study the suitable condition for degumming and surface morphology. The efficiency of degumming process was evaluated by determination of tensile strength and stainiqgJest with dire~~ dyes (C.1. Direct Red 80~StaIDing result.will be opposed to degumming efficiency. The result was revealed; the appropriate conditions for silk degumming with dry Carica payapa Linn. s latex were recommended as follows : the amount of dry latex solution of 4 % owf at 75 degree Celsius for 30 minutes. The degummed fibers leaves lustrous soft and surface smooth. This condition does not have effect to tensile strength and fiber surface.

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การศึกษาตลอดอาชีพคณะอุตสาหกรรมสิ่งทอและการออกแบบแฟชั่น ของมหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร
การศึกษาตลอดอาชีพคณะอุตสาหกรรมสิ่งทอและการออกแบบแฟชั่น ของมหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร

Undergraduate educational management of Rajamangala University of Technology Phra Nakhon has mission point to science and technology vocational based on quality professional workers. Applied technologies on the engineering works have continuous and high progress. The researchers want to emphasis with human development for stepping up to professional works in The life long studying on working period of faculty of industry textile and fashion design Rajamangala University of Technology Phra Nakhorl. The research objectives are as follows: 1.To know they want to add more performance or to change from nature of the undergraduate field to others 2.To make the teaching discipllries for gain their standard lffiowledge higher 3.To study the life long studying on working period offacuity students and alumni. Domain of research and the participant groups 1.students who studying at Rajamangala University of Technology Phra Nakhon 2.Alumni want to change their graduated field to others or gain their performance. The research results found that the platforms are according to require on the life long studying in faculty of industry textile and fashion design have to stress on teaching for gain their performance with technology involvements such as production process coloring process textile printing graphic design and computer cutting forms according to short period not more than 6 months for studying. The discussions from participants point to continue to study for gain their performance first because economics rapidly changing and several firms want the best persons. They have a lot of best knowledge worker and high performance to work with them. The participants require 1-6 months for studying because the competitive workers in the specific working markets.

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การสร้างแผนภาพไบเฟอร์เคชั่นโดยใช้เทคนิคปวงกาเร่แม้ปบนโปรแกรม PSCAD/EMTDC
การสร้างแผนภาพไบเฟอร์เคชั่นโดยใช้เทคนิคปวงกาเร่แม้ปบนโปรแกรม PSCAD/EMTDC

Bifurcation diagram is an important mathematical tool for the analysis of ferroresonance in the electrical power system. Bifurcation diagram can clearly present the behaviors of the nonlinear system. The general method for the generation of steady state bifurcation diagram is based on Ordinary Differential Equation (ODE) of the simplified single-phase circuit and the continuation technique. This paper proposes the application of PSCAD/EMTDC simulation program and the bruteforce technique to generate time response of the three-phase power system. A new device tool “Multiple Poincaré Map” is created and used with File Read and XY Plot to produce bifurcation di agrams with respect to changes of controlled parameters. Two examples related to ferroresonances in the distribution systems are presented. Bifurcation diagrams generated with the PSCAD/EMTDC and Multiple Poincaré Map confirm that the results from the simulation are in good agreement with the results from field tests.

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Air Car
Air Car

Nowadays energy conservation is widely recognized due to fuel crisis. Petroleum is one of the primary energy used in various aspects especially by factories which consume energy at very high rate. Air pollution has been caused for this reason. Lots of industrial sectors have paid attention to this problem and have found out in different ways to manage it. The purpose of this work was to apply compressed air energy which is zero emission energy as an alternative energy instead of fossil energy. This energy was used in a prototype small three-wheeler powered by an impact wrench. The vehicle carried two tanks of 10 liters of air which pressure is 90 bars. The three-wheeler used chains and gears to transmit power to wheels. The gear increased torque ratio of the impact wrench. An air valve was controlled by a sling-controlling lever. On rear wheel hub 3-speed gear was fitted to enable the car move conveniently according to speed of motor and road condition. Test results showed that air car could move with the maximum speed of 21.4 km/hr and the farthest distance of 1917 meters. The longest period of time which the car could move was about 5-6 minutes. The highest torque produced by impact wrench was 2.323 Nm at rotating speed of 3400 rpm. It was also found that between the rotating speed of 2000 and 4000 rpm the impact wrench produced the best performance and this is a good condition to be chosen for further research and development for maximum efficiency.

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