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Journal of Applied Chemical Science
Published by JACSONLINE
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
Arjuna Subject : -
Articles 24 Documents
 1   2   3 
The Effects of Rice Washing and Storage of White Rice in Magic Com on Vitamin B1 (Thiamine hydrochloride) Contents Marieta H. Ilatha; Luther Kadang; Febri O. Nitbani
Journal of Applied Chemical Science Volume 2, No. 1 , 2013
Publisher : Journal of Applied Chemical Science

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Abstract

There has been conducted the research to know the effect of rice washing and white rice storage in magic com against vitamin B1 (tiamin hydrochloride) contents. The water used in rice washing was tap water and aquadest. The presences of the building block elements of the vitamin B1 in washing water qualitatively indicated the effects of each type of the water, while the contents of the vitamin either in rice or in washing water was determined by UV-Vis spectrophotometer at wave length of 385 nm. The results showed that the sulfur and chlorine elements, the building block elements of the vitamin, were found in tape water but those elements were not found in aquadest. The vitamin contents of the rice in magic com was up to 0.214 mg/kg, the washing water of stage I, II, and III were 0.096, 0.094, and 0.183 mg/L, respectively. Those results conclusively indicate that the elements contained by the washing water determine the presences of the vitamin building block elements in the rice washing water and therefore reduced the vitamin contents of the rice. The more interesting information of this study was reported in the main article.
The Amelioration of BOD and COD Levels in Tofu Industry Liquid Waste by the Extracts of Moringa Seeds (moringa oleifera L.) and Activated Carbon of the Corn Cob (Zea mays L.) Nurhadyati; Bibiana D. Tawa; Febri O. Nitbani
Journal of Applied Chemical Science Volume 2, No. 1 , 2013
Publisher : Journal of Applied Chemical Science

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Abstract

There has been conducted a research to measure effectiveness of moringa seeds (moringa oleifera L) extract as biokoagulan and the activated carbon of corn cob (Zea mays, L) as adsorbent to ameliorate the chemical oxygen demand (COD) and biochemical oxygen demand (BOD) contents in tofu industry liquid waste. The used metods were, first method, the coagulation-floculation using moringa seed extract in various concentrations of 5000, 5200, and 5400 ppm, and the activated carbon of corn cob at concentration of 26.67 ppm and the second, the combination of coagulation/floculation with adsorption method. The results showed that the initial values of the COD and BOD of the tofu liquid waste were 1048.8 mg/L and dan 201.78 mg/L, respectively. The separated koagulation-floculation process provided maximum concentration of moringa seed extract was 5200 ppm and able to reduce COD and BOD levels respectively up to 555.07 and 161,68mg/L, while using 26.67 ppm of corn cob activated carbon could reduce the COD and BOD levels respectively up to512.13 and 115.42 mg/L; whereas the combination of coagulation/floculation-adsorption method utilizing 5200 ppm of biocoagulan and 26.67 ppm of the activated carbon yielded those COD and BOD levels respectively up to 272.93 and 73.07 mg/L. Referring to the SNI standard, these COD and BOD values meet the demand quality standard required. Both moringa seed extract and the corn cob activated carbon are prospective material to maintain COD and BOD levels of water flowing from the tofu industry.
Antibacterial Activities of Ranting Patah Tulang (Euphorbia tirucalli) Extract: Short Communication Sesilia I. Napa; Theo Da Cunha; Yohanes Buang
Journal of Applied Chemical Science Volume 2, No. 1 , 2013
Publisher : Journal of Applied Chemical Science

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Abstract

There have been studied the antibacterial activities of ranting patah tulang (euphorbia tirucalli) extracts against the growth of salmonella thyposa (gram negative) bacteria. The study was firstly started to isolate the antibacterial components of euphorbia tirucalli that was soluble in methanol. Thereafter, the methanol solvent was evaporated to yield powder and the powder was used to prepare the extract concentrations in each petri dish as of following levels that were 10.0, 15.0, 20.0, 25.0, 50.0, 80.0, and 100.0 %, respectively. The 0.0 % of euphorbia tirucalli extracts and 1.0 % of erythromycin in each petri dish served as the controls. The results showed that the clear zone of petri dish containing the bacteria and each those extracts were 36.7±5.8, 40.0±10.0, 43.3±5.8, 60.0±10.0, 66.7±5.0, 70.0±10.0, and 76.7±5.8 mm, respectively. The clear zone of both those controls containing the bacteria were 63.3±5.8 mm. Those results indicate that higher extract concentration higher the clear zone area of the petri dish. Therefore, the euphorbia tirucalli extract potentially inhibits the growth of the salmonella thyposa (gram negative) bacteria.
The Antibacterial Activities of the Extracts Isolated from the Aruda Leaf (Ruta angustifolia) Digested in Polar, Semipolar, and Nonpolar Solvents Windy Taebenu; Febri O. Nitbani; Hermania E. Wogo
Journal of Applied Chemical Science Volume 2, No. 1 , 2013
Publisher : Journal of Applied Chemical Science

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Abstract

A research has been done to know content of metabolit sekunder and antibacterial activity of polar, semipolar and nonpolar extract aruda leaf (Ruta angustifolia). Aruda leaf extract obtained with method of maceration, while antibacterial activity test carried out by the method of dilution and diffusion agar method against Escherichia coli (gram negative) and Staphylococcus aureus (gram positive). Metabolit sekunder of content implied in aruda leaf (Ceiba pentandra) that is triterpenoid, flavonoid, saponin, polifenol, tanin and alkaloid. The result of research with dilution method that methanol extract have rate value pursue minimum (KHM) equal 20% for the bacterium Escherichia coli of and not have rate value pursue minimum (KHM) for the Staphylococcus aureus bacteria. Ethyl acetate extract have rate value pursue minimum (KHM) equal to 10% of Escherichia Coli and not have of Staphylococcus aureus bacteria, while petroleum ether extract have not rate value pursue minimum (KHM) for the Escherichia Coli bacteria and for the Staphylococcus aureus bacteria. The results showed that the diffusion method with methanol extract have inhibition diameter of bacteria Escherichia coli and Staphylococcus aureus is 1,97 mm and 1,8 mm. Ethyl acetate extract average inhibition diameter is 2,33 mm in the Escherichia coli bacteria and the Staphylococcus aureus bacteria is 1.93 mm while the petroleum ether extract average inhibiton diameter 1,6 mm in Staphylococcus aureus bacteria and of inhibition diameter against the Escherichia Coli bacteria is 1,73 mm.

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