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EKSTRAKSI DAN KARAKTERISTIK FISIK-KIMIA EKSTRAK KASAR POLISAKARIDA LARUT AIR (PLA) DARI TEPUNG BIJI DURIAN (Durio zibhetinus Murr)
No full textSeed durian flour (Durio zibethinus Murr) is the waste from durian fruit wich are potential to becomewater soluble polysaccharides (WSP) source beause it contains gum. Seed durian process to seed durianflour is a method to avoid damaged material. The The research was aimed to obtained optimum extractionabout the yield of crude extract water soluble polysaccharides (WSP) from seed durian flour i.e ratiomaterial and solvent 1:5; 1:10; 1:15, extraction temperature at 30; 40; 50o C, speed sentrifuges spin7000; 10.000; 13.000 rpm; ratio supernatant and ethanol 1:3; 1:4; 1:5, extraction time for 0, 1, and 2 hrs,along with to characterize crude extract water soluble polysaccharides (WSP) from seed durian flour. theresults showed that highest extraction yield was obtained in combination with 1:10 of ratio material andsolvent, 50 °C of extraction temperature,13.000 rpm of speed sentrifuges spin, 1:4 of ratio supernatantand ethanol, and 2 hrs of extraction. It yielded WSP of 3,56%, brigthness (L) of 49,32. This WSP containedwater, ash, fatty, protein, carbohydrate, and total sugar of 13,86%, 12,48%, 1,78%; 19,76%, 65,98 and 61,23% respectively. Keywords: Water soluble polysaccharides, extraction, seed durian flou
ANALISIS PENGARUH VARIASI MASSA LPG SEBAGAI REFRIGERAN TERHADAP PRESTASI KERJA DARI LEMARI ES
Get PDFRefrigerant is a fluid acting on a cooling machine that plays an important role in a carnot cycle cooling engine. In study was done by looking at the effect of adding refrigerant mass variation of the COP (Coefficient of Performance) by using a refrigerant-based non-Freon refrigerant that use LPG (Petrileum Liquefied Gas). In this study using the LPG mass variations 50 grams, 80 grams and 90 grams and use R-12 refrigerant. From the research conducted, the results obtained from the performance engine cooling using refrigerant 80 grams times higher than that using the mass 50 grams and 90 grams, the highest coefficient of performance that is equal to 6,30 The result of research conducted, the result that the COP of the vapor compression machine (fridge) with a variation of the mass is the mass composition 80 grams is best used to obtain the greatest COP. Keyword : carnot’s siklus, COP (Coefficient of Performance), LPG(Liquefied Petrileum Gas
Analisa Pengaruh Konfigurasi Pipa Pemanas Air Surya Terhadap Efisiensi
Get PDFIn order to reduce or replace the use of wood fuel, oil and natural gas to heat water, has a lot of research being done to find alternative energy sources. Solar energy is one alternative energy that can be used to heat water. Solar collector is a device that serves to collect the incoming solar energy and convert it into heat energy which in turn forwarded to the working fluid. The purpose of this study solar water heater is to compare the influence of the configuration of pipes and pipe parallel series with the addition of the collector absorber plate honeycomb shaped the performance of solar energy water heater so that in can be efficiency. From research result obtained temperature irrigate in parallel pipe collector tank at angle 5o equal to 52 oC and also reached efficiency that is 46,16 %, at angle 10o equal to 54 °C reached efficiency 48,15 %, at angle 15o equal to 51 oC reached efficiency 45,10 % and at angle 20o equal to 48 °C and also reached efficiency that is 39,60 % while the water temperature inside the tank to the collector pipe series at angle 5 o equal to 48 oC reached efficiency is 41.67 %, the angle at 10 o equal to 49 oC reached efficiency is 42.86 %, angle 15 º equal to 47 °C reached efficiency is 40.43 % and at an angle 20o equal to 46 °C and also reached efficiency that is 39,14 %. In general, the obtained results indicate that the solar collector with parallel pipe configuration has better efficiency compared to solar collector with series pipe configuration. Keywords: Solar Energy, Solar Collectors, Series Pipe, Parallel Pipe, Efficienc
PENGARUH PROSES PENGADUKAN TERHADAP KARAKTER ADONAN DAN SIFAT BIODEGRADABLE PLASTIC YANG DIBUAT DARI BUNGKIL BIJI JARAK PAGAR
Get PDFManufacture of biodegradable plastics in this study begins with making the dough using a single screw extruder, then the dough is molded by using a compression molding machine. The basic material used is a mixture of jatropha seed meal, corn starch, CMC (composition 7: 2: 1). This study aimed to study the effect of Helic corner and screw compression ratio of the batter character and biodegradable plastic produced. Helic screw angle was varied from 2,5o; 5o; 7.5 ° and screw compression ratio varied from 1.5; 2.5; 3.5. The results showed an increase in the angle of screw Helic simplify the process of molding (lowering the value of Tg, Tm, ΔH and texture of the dough) and to improve the mechanical physical properties of the biodegradable plastic produced (tensile strength, strain increases while the thickness and Water Vapor transmition rate decreases). Improved compression ratio increase and decrease the thermal properties of dough texture and increase the tensile strength and strain, decrease the thickness and Water Vapor transmition rate of biodegradable plastic produced. Keyword: biodegradable plastic, mold, helical degree, compression rati
ANALISIS VARIASI TEMPERATUR LOGAM KATALIS TEMBAGA (Cu) PADA CATALYTIC CONVERTER UNTUK MEREDUKSI EMISI GAS KARBONMONOKSIDA (CO) DAN HIDROKARBON (HC) KENDARAAN BERMOTOR
Get PDFThe air pollution rate caused by the vehicles in big cities is now reach the critical limit. It affects the environmental health as well as the financial factors. To reduce the pollutant gas from the vehicle engines emission, a technology is needed. One of the technology is the application of catalytic converter inside the exhaust emission. A research has been done on 125 cc motorcycle engine to modify its exhaust emission. The catalysts used in this research was made of copper and designed using the honeycomb system with various diameters ( 4, 6, 8, 10, 12 mm). The observation variables are catalyst temperature, CO and HC emission rate. The emission of CO and HC from the sample engine was then compared with the standard emission rates. Result showed that increase of the copper catalyst temperature resulted in decrease of CO and HC emission rates. The decrease started to occur for all the catalysts at 225 oC. Optimum convertion efficiency is up to 47,93 % (CO) and 50,36 % (HC). Both optimum efficiency reached at the temperature of 325 oC using 8 mm diametered catalysts. Keywords : air pollutions, honeycomb system catalytic converter, temperature and coppe
INDEX PERFORMANCE ANALYSIS KUALITAS LAYANAN DAN MANAJEMEN STRATEGI PENATAAN KAWASAN WISATA SONGGORITI
Get PDFThe acceleration of economic growth in the region is supported by the potential of sectoral support the local economy in which one sector is tourism. The development of tourism has an important role for the development of an area, and evenly expand  and employment opportunities, encouraging the development of local, regional and national income increase in order to improve the welfare and prosperity of the community. Stone City is one city where the tourism destination which is Tourism Songgoriti. The potential is very supportive in the growth of the real economy both in terms of products and services. Structuring economic support infrastructure around the holidays can be a priority so that regional economic growth is expected to not only provide opportunities for people with middle and upper economic level but more in favor of increasing the value of the benefit to the surrounding community. To support a more targeted policy measures, especially for the Holidays Songgoriti, it would require an identification of potential research activity in particular economic and business prospects around the area of ​​service quality attributes identified tourism areas Songgoriti desired by consumers (consumer expectations) and how consumer perceptions of attributes -attributes by field survey methods and questionnaires to the respondents who are consumers who have traveled to Songgoiti. Based on data from surveys and questionnaires and supported other secondary data and then do performance Index Analysis (IPA), SWOT Analysis. From the results of the new analyst made recommendations on the business prospects of the development plan Songgoriti tourism area in accordance with the desires of consumers, among others, relating to the restructuring and renovation Songgoriti markets, development of adequate parking facilities, arrangement of PKL to localize them along the roadside as they usually occupy This unique vehicle build date Doloe case of traditional stalls, performances of dance and music studio tadsional, etc.. In order to realize these plans is the management Songgoriti should coordinate intensively with people around the area with government policy support and consistent progressive Rock. Keywords: SWOT Analysis, Index Performance Analysis, intensive coordinatio
PERANCANGAN DAN PENGEMBANGAN PRODUK RAGUM DENGAN METODE QUALITY FUNCTION DEPLOYMENT (QFD)
Get PDFVise used in the work bench or work processes functioning manual for gripping the workpiece and can also be used in the machining process. Most of the manufacturing industry in Indonesia, still not able to design their own products. In the process of making problems often arise include the design can not be realized, the high cost of manufacture or product functionality that is not being met, so it can be said that not enough manufacturing industries are well qualified to produce quality products that can compete. Quality Function Deployment (QFD) is a method used to anticipate and prioritize the needs and desires of consumers, as well as incorporating the needs and desires of the consumer goods and services produced by the company. The purpose of this research is to design and develop products vise using the Quality Function Deployment. The data required in this study consisted of primary data and secondary data. Primary data were obtained from the distribution of questionnaires to the respondents. Secondary data was collected through library research. From the research, it can develop new products with specifications vise: (1) vise must be equipped with a third axis of rotation (14.14%), (2) vise with solid physical form (10.71%), (3) Price selling cheap (10.20%), (4) is equipped with a vise grip (9.05%), (5) vise is equipped with a practical guide (9.04%), (6) vise should be light (9, 03%), (7) pencekam jaw vise flexible, flat (8.27%), (8) vise easy to diasembling (8.27%), (9) Material of vise HR 1040 (7.6%), (10) Age used (7.36%), (11) The components easily obtainable (6.36%). Key word : Vise, Quality Function Deployment, House of Qualit
PERANCANGAN DAN PENGEMBANGAN MESIN PENGAHANCUR SAMPAH ORGANIK MODEL PISAU PUTAR (ROTARY)
Get PDFThis design to make the organic garbage crusher machine which its structure can be made easy and cheap by society, and can be operated simply, moved by diesel engine 20 hp own the ability can can break the permanent organic garbage upon which compost. This activity divisible in 2 solution framework that is technical solution framework and solution non technical. Technical Approach: approach to society of orchard Damsari by attending method/machine to processes and dissociate the garbage type so that heaping sum up the deductible garbage. Approach of non technical: approach to citizen by guiding and growing to develop the society awareness about its important keep cleaning environmental and sanitasi. From final this activity inferential that: making of organic garbage crusher machine earn the especial problems faced by group society orchard of Damsari town Sempu Banyuwangi. Making of enforceable organic garbage Machine better as according to time plan which have been determined, Especial problems partner concerning garbage processing with the this machine attendance expected depending to on duty deductible town Sempu hygiene and created society of self manage garbage. Result from this garbage processing machine in the form organic garbage upon which compost of the size 2-3 cm and organic garbage process become the compost used by farmer group, so that indirectly can improve the earnings of society of orchard Damsari and permeating new labour. Keyword: crusher, organic garbage and compost
ANALISA TEGANGAN VON MISES PADA ALAT BANTU JALAN (WALKER)
Get PDFMovement for a walk is a function that needs to be helped, especially for the elderly because they experienced degradation of function or sick, one of them is degradation of the body's energy balance. Not uncommon among those who have trouble for walking, that is because the degradation on muscle strength in the limbs, for example, arm muscles, hand muscles, limb muscles, and leg muscles. Moreover, if the condition is accompanied by degenerative diseases such as osteoporosis, Parkinson's, stroke, knee pain, and fractures. A walker, making the right solution. One of the tools is Walker. Walker is an assistant to a very lightweight, portable, high waist, is made of metal pipe, and this tool comes with two handles that serves as a place that used to hold users and is equipped with four sturdy legs as the pedestal. While the power of the framework are analyzed with the help of CATIA V5R14 software is to determine the stress that occurs in order to operate as a walker. It appears that the greatest stress occurs is still under tension permission of the material itself. Stress equivalent (Von-Mises stress) that occurs should not exceed 1.583333e+007 N/m2 while the voltage that occurs on the order of 1.77e +005 N/m2 walker located at the foot of the minimum voltage while working on the framework of the 6.98e-009 N/m2 located on the frame. Key words: walker, von mises stress and framework