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Journal : BUANA SAINS

REVITALISASI KEMITRAAN TEMBAKAU VIRGINIA DI JAWA TIMUR Samsuri Tirtosastro; Taufik Iskandar
BUANA SAINS Vol 11, No 1 (2011)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (241.629 KB) | DOI: 10.33366/bs.v11i1.179

Abstract

Cigarette industries in Indonesia especially nowadays still need to import some raw ingredients. The highest import for 10 years (2001-2010) is from China i.e. for about 28,288,197 ton/year or 53.38% from import total of the total import of 52,999,855 kg/year with a value of USD 127.149.050/year. The price of dried tobacco leaves from China is only USD 1,996/kg or 83.84% from the average price of import dried tobacco leaves. Base on these data, it is showed that most local cigarette industries need to have dried tobacco leaves with medium quality and low price. Opportunity for East Java to develop virginia tobacco is high enough. East Java not only has quite potential area, but also has technology packages which are sufficient enough to increase productivity up to 2,000kg/ha or more. The weakness is the system for guiding farmers. There is no link in the technology partnership, production tools, furthermore marketing resulted in low productivity and quality. As a fancy product there should be a link between farmers as producers and tobacco industries as consumers for all sub-systems of virginia tobacco farming business. Cooperation of producers, consumers, and local governments is the basic framework of the system for guiding. Producers and consumers had more cooperation in the aspects of production and quality improvement. Local government regulations governed on all parties working together based on justice. Farmers as producers are obliged to apply the technology built and sell dried tobacco leaves according to the company's pricing agreement builder
REAKSI KINETIS PEMECAHAN MINERAL ILMENIT PADA SINTESA TiO2 DENGAN H2SO4 Zuhdi Ma’sum; Taufik Iskandar
BUANA SAINS Vol 9, No 2 (2009)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (215.522 KB) | DOI: 10.33366/bs.v9i2.240

Abstract

Titanium diokside (TiO2) is widely used in chemical industries, especially in ceramics industries. It could be produced by destructing of the ilmenite mineral with sulfuric acid. The design process of destruction needs mathematical modeling which is similar to heterogeneous system that involves both mass transfer and chemical reaction simultaneously. The reaction between the ilmenite mineral and sulfuric acid was conducted in a stirred-batch reactor. The ilmenite mineral and sulfuric acid were mixed in the reactor then it was closed. The reactor was heated and stirred at a certain stirring rate until desired temperature was reached. Samples were withdrawn every 10 minutes. The variables studied were the reaction temperature in the tange of 383 K and 403 K and the rate of stirring in the range of 60 and 125 rpm. There were two proposes models. The first model was a shrinking-core mixed chemical-dynamic regime model. The second model was a shrinking-core chemical regime model. Based on the results, the first model was the suitable model of the two models proposed for describing the kinetics phenomena of the destruction of ilmenite mineral with sulfuric acid. From this model it was obtained that the value of reaction rate constant (kr) could be approached by the Arrhenius equation, as the following; kr = 8,59.1019.e-44578/(RT), in which R is the gas constant and T is the absolute temperature. It was obtained that the value of mass transfer coefficient was not significantly influenced by the rate of stirring
POLA WILLINGNES TO PAY (WTP) KOMODITI TAHU DAN DAGING MASYARAKAT KOTA MALANG Umi Rofiatin; Taufik Iskandar
BUANA SAINS Vol 17, No 1 (2017)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (262.589 KB) | DOI: 10.33366/bs.v17i1.584

Abstract

Soybeans and meat are the most strategic food commodities and are very risky if it is fully entrusted to the mechanism of the free market. The point is, soy and meat commodities have a very central role in national food policy channels. One of the agricultural ministry targets for 2010 - 2014 is to increase food diversification, especially to reduce rice and wheat consumption. During 2010 - 2014, rice consumption is targeted to fall by 1.5% per year and balanced by increasing in consumption of tubers, animal foods, fruits and vegetables. On the other side, it is also strived to achieve a diverse, nutritious, balanced and safe food consumption pattern as reflected by the increase of Expected Food Pattern (PPH) scores from 86.4 in 2010 to 93.3 in 2014. This study aimed to determine the characteristics of the community in taking decision to buy food products from both tofu and meat sources and to analyze the key factors of consumer’s willingness to buy tofu and meat by using multiple linear regression methods. The results of the study showedthat the characteristics of respondents in the research that affected the gender of respondents were women because married women were the decision makers in terms of household needs. The factors that affected the willingness of consumers to pay tofu were: taste, price and size. Meanwhile, thefactors that affected consumers' willingness to pay for meat were price and shape.
DEHIDRASI KATALITIK MINYAK JARAK DENGAN DISERTAI PENGALIRAN GAS Taufik Iskandar
BUANA SAINS Vol 11, No 2 (2011)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (107.992 KB) | DOI: 10.33366/bs.v11i2.171

Abstract

Dehydration to be run by heating castor oil and of natrium sulphate hydrogen at temperature, certain time is at the same time swirled and emited a stream of by carbon gas of dioxid. Result of which is to determined by its iodine number, sour number, viscosity, diffraction index, specific gravity and colour. Situation of good process is usage 0,946 gmol; 100 g castor oil; NaHSO4 3% from oil weight, temperature 1900C, time 45 castor oil amount and minute 100 g, for gourd 500 cc. biggest and time reaction of. Iodine number which have been reached 181,5 or increase of iodine number 98,3 from its value in oil initialy
PENGARUH ENZIM BROMELIN DAN WAKTU INKUBASI PADA PROSES HIDROLISIS IKAN LEMURU MENJADI KECAP Taufik Iskandar; Desi Arena Widyasrini
BUANA SAINS Vol 9, No 2 (2009)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (159.127 KB) | DOI: 10.33366/bs.v9i2.241

Abstract

The process of making fish ketchup used to take quite long time. There are many efforts to improve the technology; one of them is using proteolitic enzime as a catalist that has a function of breaking down protein into asam aminos. Anyway, the problem is that the pure proteolistic enzime costs very expensive. This research was trying to find the way to easily and less costly make proteolitic enzime, and highly to dissolve nitrogen as well. The extract of pineapples was then used in the hydrolisis process because it is known that it contains high quantity of bromelin enzime act as proteolitic enzime. A kind of fish called lemuru was choosen as a raw material of producing ketchup in this observation due to the high content of protein. The hydrolisis process is conducted in the room temperature by adding the extract of pineapples in some variety of concentration (6, 8, 10%) and using 8, 10, and 12 hours incubation time. The best result was at the concentration of 8% pineapple axtract and 10 hours incubation time. It produced totally 1,0233% nitrogen, contained of 0,86% dissolvent nitrogen, 27,5% dissolvent solid substance, 17% liquid volume and viscocity of 41,364%