907 research outputs found

    Optimalisasi Konsentrasi Sukrosa Dan Ammonium Sulfat Pada Produksi Nata De Citrus Menggunakan Sari Jeruk Afkir

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    This study aimed to explore the use of rejected citrus fruit as raw material for making nata and to obtain the best concentration of sucrose and ammonium sulfate on the characteristics of nata de citrus produced. Research conducted experiments used a Completely Randomized Design (CRD) Factorial model with two factor treatments and three replications. The first factor was the concentration of sucrose with four levels, namely 0, 2.5, 5 and 7.5% and the second factor was the concentration of ammonium sulfate with three levels, namely 0.5, 0.6 and 0.7%. The results showed interaction of sucrose and ammonium sulfate concentrations significantly affected the acquisition of the water content and reducing sugar content. Sucrose concentrations significantly affected againts the value of water content, degree of acidity (pH), thickness, wet weight, yield and reducing sugar content. The concentrations of ammonium sulfate significantly affected againts water content, thickness, wet weight, yield and reducing sugar content. The best treatment of S3A3 (7,5% sucrose and 0,7% ammonium sulfate) result the degree of water content 88,94%, degree of acidity (pH) 3,57, thickness 4,58 mm, wet weight 132,20 g, yield 30,28% and reducing sugar content 1,89% of nata de citrus was relatively better than other treatments

    Observation of electro-activated localized structures in broad area VCSELs

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    We demonstrate experimentally the electro-activation of a localized optical structure in a coherently driven broad-area vertical-cavity surface-emitting laser (VCSEL) operated below threshold. Control is achieved by electro-optically steering a writing beam through a pre-programmable switch based on a photorefractive funnel waveguide.Comment: 5 Figure

    The Correlation Between Characteristic Host, Physics Environment and Health Service to Dengue Hemorrhagic Fever (Dhf) in Working Area of Public Health Center of Talang Ubi Pendopo in 2012

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    Background : DHF in Indonesia included A category in the stratification by WHO indicate high rates of hospitalization and deaths due to DHF. Preliminary survey which has been conducted showed in Working Area of Public Health Centre DHF cases is high 51 cases during 2011,. Therefore, the aim of this study was to identifiy the correlation between Characteristics Host, Physics Environment and Health Service to DHF in Working Area of Public Health Centre of Talang Ubi in period of 2012. Method : Used analytical survey study with cross sectional approach. Data collection was conducted by interview and observation using questionnaire and using checklist. The data were analyzed by method of univariate and bivariate with chi square analysis. The number of samples in this study were 85 head of household in Working Area of Public Health Centre of Talang Ubi Pendopo with Sampling Technique used is Simple Random Sampling Techniques. Resulst : From total of six variables, three variables associated with DHF, that are age (p-value=0.002, PR=4.383), physics environment (p-value=0.001, PR=4.750), and health service (p-value=0.022, PR=2.936), while sex (p-value=0.996, PR=1.002), education (p-value=0.093, PR=2.182), and job (p-value=0.216, PR=1.766) has no correlation to the incidence of DHF. Conclution : Public Health Centre of Talang Ubi need to improve health service through promotion and prevention to reduce the transmission and DHF case, improve support of health workers to implement the DHF programs with the best, and the society should also support by improving the environment around the house so as not to be a breeding place of Aedes aegypti and implement the PSN-Aedes aegypti
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