Analisis Risiko Kesehatan Lingkungan Pencemaran Nitrat (No3) pada Air Sumur Gali di Kawasan Pertanian Desa Tumpukan Kecamatan Karangdowo Kabupaten Klaten

In amount of 67.69% Tumpukan village is an agricultural area where has been contribute nitrate in the groundwater through fertilization activity. The use of urea fertilizer in Indonesia 400-600 kg urea / ha, it exceeds the government's recommendation (200-260 kg urea / ha). The aims of this research is to determine the risk level of exposure nitrate in Tumpukan Village. The research uses a descriptive observational with design study cross sectional and field study ARKL approach. The analysis of data use ARKL method (hazard identification, dose-response analysis, exposure analysis and risk characteristics). The object of population is all wells in the Tumpukan village and the subjects of population are people who use wells for drinking water . The sample object of research is 16 wells were used as sources of drinking water with a distance <50 meters from the area of agriculture and the sample subjects were 89 respondents who use the sample object as sources of drinking water. The results showed an average weight, rate, nitrate's concentration is 52.59 kg and 1.89 liter, 21,26 mg/L. There are nine respondents (10.1%) which have RQ> 1. The conclusion is the risk of nitrate exposure in Tumpukan village is quite low (10.1% of research subjects who are at risk of health problems noncarcinogenic), the risk will appear in the next 10 years for children and 52 years for Adult. The suggestions are farmers can fertilize with organic and inorganic N fertilizer in a balanced way and conducted with the dose and the right time

Purchasing Decision Efforts At Yoedha Reklame Kalilarangan Surakarta Reviewed From The Aspect Of Marketing Mix

The purpose of this study was to empirically analyze the effect of product, price, location, promotion and distribution on purchasing decisions on Yoedha Reklame Kalilarngan. The population in this study is customersat Yoedha Reklame Kalilarangan. The sample of this study was taken as many as 90 samples used as respondents. The analysis method in this study consisted of testing instruments, classic assumption tests, multiple linear regression analysis, t test, F test and 2 test. Based on the results of the analysis show that the validity and reliability test on all items asked questions proved to be valid and reliable. The classic assumption test results show that this study does not occur multicollinearity, there is no heteroscedasticity, autocorrelation in the regression model and normally distributed. The results of multiple linear regression coefficients show thatthe product variable has a negative effect and the variable price, location, promotion, distribution has a positive effect on purchasing decisions in Yoedha Reklame Kalilarangan. The results of the t test show that the product has a negative and insignificant effect, for prices, promotions and distribution to have a positive and significant effect, while the location has a positive and insignificant effect on purchasing decisions at Yoedha ReklameKalilarangan. The results of the F test indicate that there is a significant influence between product, price, location, promotion and distribution together on purchasing decisions in Yoedha Reklame Kalilarangan.Meanwhile, the results of the 2 test (coefficient of determination) are known that product variables, price, location, promotion and distribution are able to explain 48.4% of the purchase decision variable, while the remaining 51.6% is explained by other variables such as brand image, brand image, and consumer loyalty

Karakterisasi dan Aktivitas Antibakteri Minyak Serai Wangi (Cymbopogon Nardus (L.) Rendle) terhadap Propionibacterium Acnes

Serai wangi (Cymbopogon nardus (L.) Rendle) merupakan tanaman berkhasiat obat dengan kandungan senyawa yang dimilikinya. Geraniol, sitronelal, dan sitronelol dalam minyak atsiri sereh wangi memiliki daya antibakteri. Tujuan penelitian ini untuk mengidentifikasi kandungan dari minyak atsiri serai wangi dan mengevaluasi efektivitasnya sebagai antibakteri terhadap penyebab jerawat Propionibacterium acnes. Penelitian ini bersifat eksperimental, dengan tahap pengujian meliputi identifikasi minyak atsiri dengan kromatografi Gas Chromatography Mass Spectrometry (GC-MS) dan uji difusi mikrobiologi dengan metode sumuran pada berbagai variasi konsentrasi minyak, yaitu 10, 25, 50, 75, dan 100%. Hasil GC-MS menunjukkan adanya tiga komponen utama dalam minyak atsiri serai wangi, sitronelal (25,21%), geraniol (3,11%), dan cyclohexane, 1-ethenyl-1-methyl-2,4-bis(1-methylethenyl)- (1,18%). Hasil uji mikrobiologi minyak serai wangi terhadap bakteri P. acnes menunjukkan bahwa diameter daya hambat yang dihasilkan oleh masing-masing konsentrasi berbeda. Daya hambat terbesar diperoleh dari konsentrasi 100% dengan diameter penghambatan sebesar 17±2,64 mm, sedangkan daya hambat terendah dihasilkan oleh konsentrasi 10% (11,7±0,57 mm). Dapat disimpulkan bahwa minyak atsiri serai wangi yang digunakan memiliki aktivitas antibakteri terhadap P. acnes