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Articles 200 Documents

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Modeling Carrying Capability of Agricultural Land with Spatial Autoregressive Model (SAR) in Batu City Meilinda Trisilia; Henny Pramoedyo; Suci Astutik
Natural B, Journal of Health and Environmental Sciences Vol 2, No 4 (2014)
Publisher : Natural B, Journal of Health and Environmental Sciences

Increasing population growth can lead to the availability of agricultural land becomes smaller, it causes an imbalance of farmers population in a region with an area of agricultural land there, so the population pressure on agricultural land will be greater so that the region no longer can meet the needs of food population. If this happends continue then it is not impossible that the production has not proportional to the needs of existing population, and resulted in the carrying capacity of agricultural land will be smaller. So the analysis of the carrying capacity of agricultural land needs to be done to determine the ability of the land to provide food for the population needs in a given area. Carrying capacity of agricultural land is a function of several spatial variables may give effect in spatial linkages. The model can explain the relationship between variables that have a spatial relationship is called spatial regression models. One of the effective spatial regression models to estimate the effects of data that has a spatial dependency in the response variable is Spatial Autoregressive (SAR) model. Agricultural land supporting food is a phenomenon of spatial autocorrelation. Based on observations made at the carrying capacity of agricultural land for food in every village in Batu City, information obtained that there is significant effects of the percentage of farmers (X1), the land area for a decent life (X2), and the amount of food crops (X3) and the coefficient dependencies on lag (ρ) to the carrying capacity of farmland food (Y).

Study of Plastic Making on Polyblend Methylacrylate-Starch Istiroyah Istiroyah; Lailatin Nuriyah; N. Ardian P
Natural B, Journal of Health and Environmental Sciences Vol 1, No 2 (2011)
Publisher : Natural B, Journal of Health and Environmental Sciences

The aims of the research were to make biodegradable plastics starch-methyl acrylate. FTIR spectra showed that polymerization of 100 grams of starch with 2 L of water at 95ºC and added by 150 grams of methyl acrylate at 40-45ºC with ceric ammonium nitrate as catalyst, produced polyblend plastics. Tensile strength of plastics depends on starch type. Biodegradable plastics with starch that have high amylase concentration showed high tensile strength. Plastic sweet potato starch had maximum tensil strength at 18.6±4.4 Mpa while maximum elongation at bread was at 25.33±6.29% from plastic madeform corn strach.

Yogurt Supplementation In Rats (Rattus Norvegicus) Foods Affected by Formaldehyde Exposure to Enzymatic Antioxidant Activity at Hepar tissue Chanif Mahdi; Aulanniam Aulanniam
Natural B, Journal of Health and Environmental Sciences Vol 1, No 2 (2011)
Publisher : Natural B, Journal of Health and Environmental Sciences

Yogurt or yogurt is fermented milk products are rich in various vitamins and amino acids, has potential as a potential source of exogenous antioxidants. Formaldehyde is an organic compound or the aldehyde group of the most simple alkanal are toxic and carcinogenic, presenting in the body can act as a source of compounds reactive oxygen species (ROS) and free radicals that damage cells and tissues are organs. The purpose of this study was to determine the effects of formaldehyde as a toxic compound, and yogurt as detoksikan of antioxidant activity in this regard is the enzymatic antioxidant activity superoksid dismutase (SOD) and levels of reduced glutathione (GSH). The results showed that exposure to various doses of formaldehyde in food rat (Rattus norvegicus) respectively is 0 ppm, 25 ppm 50 ppm 75 ppm and 100 ppm is very real effect (P <0.01) toward decreased antioxidant enzymatic activity in this regard is the reduction of activity superoksid dismutase (SOD) and GSH levels).The results also showed that treatment of yogurt supplementation at 2 ml per cow per day in rats (Rattus norvegicus) were exposed to formaldehyde are not able to change the effect of formaldehyde exposure to the decrease of antioxidant activity (SOD activity and GSH levels) with the significance level remains highly significant (P <0.01)

The derivatization of α-Pinena: Synthesis of Organonitrogen Compounds and Study of Its Potential as a Drug Candidate Mohammad Farid Rahman; Rurini Retnowati; Suratmo Suratmo
Natural B, Journal of Health and Environmental Sciences Vol 1, No 1 (2011)
Publisher : Natural B, Journal of Health and Environmental Sciences

a-Pinene is the major compound in oil of turpentine that can be developed as the- starting material to synthesize compounds that have potential as organonitrogen ingredients through biological and physiological properties. Changes a-pinene into organonitrogen compounds can be carried out via addition reactions to the alkene group through Ritter reaction using acetonitrile or benzonitrile reagent. Carbocation rearrangement that occurs in reaction to direct the reaction products varies. a-Pinene reaction with acetonitrile to produce the compounds N-[1-Methyl-1-(4-methyl-cyclohex-3-enyl)-ethyl]-acetamide, N-(1,5-Dimethyl-1-vinyl-hex-4-enyl)-acetamide and N-(2,6,6-trimethyl-bicyclo[3.1.1] hept-2-yl)-acetamide. While a-pinene reactions with benzonitrile to produce the compounds of N-(1,5-Dimethyl-1-vinyl-hex-4-enyl)-benzamide and N-[1-Methyl-1-(4-methyl-cyclohex-3-enyl)-ethyl]-benzamide. Reaction products with ingredients benzonitrile (LC50 = 203.86 ppm) has a higher toxicity than acetonitrile-based reaction product (LC50 = 504.80 ppm) based on the test Brine Shrimp Lethality Test (BSLT).

Effects of Visible Spectrum on Potential Differential Response to Soybean Sprouts (Glycine max (L.) Merill) during photosynthesis Farida Wahyuni; Unggul P. Juswono; Kusharto Kusharto
Natural B, Journal of Health and Environmental Sciences Vol 1, No 3 (2012)
Publisher : Natural B, Journal of Health and Environmental Sciences

The absorption visible light spectrum by chlorophyll cause excited electron. The transition of electron in photosynthesis process result electrical potential difference response which can be utilized to spur metabolism process in the plants itself. This research used the seedling of Glycine max (L.) and the varietas is sindoro. The measurement of the potential difference response is done by adding of visible light (red, yellow, green, blue and violet) alternately to the bean sprouts of Glycine max (L.) Merill. The light distribution is being done for 1 second, 5 second and constantly. The result of the research showed the effect of the visible light distribution constantly in the photosynthesis process. In the red light occurs maximum potential difference response. In peak I resulted -147,3 mV and peak II resulted -137 mV. The minimum potential difference response is resulted by green light. in peak I resulted -68,8 mV and peak II resulted -56,75 mV. The effect of the visible light distribution during any time in the photosynthesis process. In the red light occurs maximum potential difference response. In peak I resulted -119,2 mV for 1 second and -146 Mv for 5 second. In peak II resulted - 112,3 mV for 1 second and -125,5 mV for 5 second. The minimum potential difference response is resulted by green light. In peak I resulted -64,75 mV for 1 second, -69,5 mV for 5 second, and in peak II resulted -55,9 mV for 1 second and -56 mV for 5 second.

Utilization of Liquid Emulsion Membranes To Set Aside Nickel Ions In Liquid Waste Bambang Ismuyanto
Natural B, Journal of Health and Environmental Sciences Vol 1, No 3 (2012)
Publisher : Natural B, Journal of Health and Environmental Sciences

Emulsion liquid membrane containing Di-(2ethylhexyl) phosphoric acid (D2EHPA) have been applied to remove nickel ion from wastewater of electroplating industry. Membrane was made from 0.1 mL of Span – 80; 0.6 mL of D2EHPA and 9.3 mL kerosene. Internal phase was made from 5 mL HCl 0,1 N, while the external phase that was nickel solution varied on concentration for 100-300 ppm. The separation process was done by stirring the solution in various rate of 100-250 rpm at 4 minutes. The last concentration of nickel was measured by using visible spectrophotometry at wavelength 470 nm by dimethylglyoxime method. From the experimental results, it has been established that increasing in stirring rate could increasing permeated nickel ion value. While increased on concentration of external phase also promoted permeated nickel ion value, with highest value 75%.

General Spatial Models (GSM) Approach on Baby Infant Mortality Data Henny Pramoedyo; Meilinda Trisilia
Natural B, Journal of Health and Environmental Sciences Vol 1, No 3 (2012)
Publisher : Natural B, Journal of Health and Environmental Sciences

Proximity and linkages between sites led to the emergence of the phenomenon of spatial linkages. Weighting matrix can be used to determine the proximity and linkages between spatial data or spatial relationships and can be used to calculate the coefficient of spatial dependencies. This study uses spatial panel data, namely the infant mortality rate (IMR) regional data taken from a unit area of development (SWP) Gerbangkertasusila and the Malang-Pasuruan SWP in the period 2005-2009. Those data use rook contiguity to make spatial weighting matrix. The aim of this study is to determine the model of what can be formed from the general spatial model (GSM) using panel data. Estimation of panel models with common effects approaches, fixed effects and random effects, will be followed by estimating the coefficient parameters of the general spatial model on panel data using maximum likelihood estimation method. From the prediction model by using software EViews7 note that all spatial panel data in this study followed the random effect model. To estimate the coefficient parameters of the general spatial model with Matlab-R2010 software is used to obtain a spatial lag / autoregressive models (SAR) of random effects and spatial error models (SEM) random effect. Model selection using the criteria as well as the largest R2 and corr2, and the smallest AIC values, the MSE values and the SC values. The best model for regional infant mortality data is the spatial error models (SEM) random effect.

Insecticide Effects on Membrane Potential of Catfish Egg Cell (Clarias batrachus) Unggul Punjung Juswono; Kusharto Kusharto; Yeni Cahyati; Risalatul Latifah
Natural B, Journal of Health and Environmental Sciences Vol 1, No 3 (2012)
Publisher : Natural B, Journal of Health and Environmental Sciences

Pollution has been occured in our environment due to daily life waste, industrial and using of peptiside in agroindustrial farm. Over usuage and dose of peptiside could be harmfull to the farm environment especially for fish farm. Measurement of membrane potential of fish egg cells is a simple metode to investigate water polution level. Membrane potential of fish egg cells can be measured using microelectrode probe which is connected to an electrometer. The changing of membrane potential value indicate the level of water polution. Variation of peptiside concentrations cause the changing of potential membrane value. Increasing of peptiside concentration cause decreasing of potential membrane. Its may due to some blocking of channel and other protein by peptiside molecule so the permeability of membrane to ions is decrease. The results of our experiment show that the increasing of peptiside concentration cause decreasing of the membrane potential value. For peptiside concentration of 0.4% decrease potential membrane to -28 ± 5 mV. It means that the increasing peptiside concentration cause significanly decrease in potential membrane which may be used for prediction of water polution level.

Early Poly Mass Effect (trimethylene-sebasat) On Biodegradation Rate In Liquid Media Using Mucor Miehei In Aerobic Kholisul Fuad, Akhmad; Mardiana, Diah; Roosdiana, Anna
Natural B, Journal of Health and Environmental Sciences Vol 1, No 3 (2012)
Publisher : Natural B, Journal of Health and Environmental Sciences

The author has conducted research about the effect of poly(trimethylene-sebacate) mass toward the rate of biodegradation using Mucor miehei in aerobic liquid media. Poly(trimethylene-sebacate) is a biodegradable linear aliphatic polyester, that can be degraded by Mucor miehei lipase. To determine the effect of poly(trimethylene-sebacate) mass in the biodegradation, the mass of poly(trimethylene-sebacate) were varied 0.06 g, 0.08 g, 0.1 g, 0.12 g and 0.14 g. Biodegradation process carried out for 12 hours, using liquid of Complex media, which was nutrient rich for Mucor miehei growth, and solution at pH 5. The resulting CO2 gas was flowed into the 50 mL reservoir of 0.1 M NaOH, followed by titration using 0.05 M HCl and MO (methyl orange) and PP (phenolptalein) indicator. The rate of CO2 gas were 0.287 x 10-3 M/h; 0.102 x 10-3 M/h; 0.137 x 10-3 M/h; 0.016 x 10-3 M/h; and 0.039 x 10-3 M/h respectively. The greater rate of CO2 produced the lower mass of poly(trimethylene-sebacate).

Landslide Zone Investigation with Resistivity Method In Jombok Village, Ngantang District, Malang Regency Pitoyo Widhi Atmoko; Adi Susilo; Arief Rahmansyah
Natural B, Journal of Health and Environmental Sciences Vol 1, No 3 (2012)
Publisher : Natural B, Journal of Health and Environmental Sciences

Has done research in the Jombok Village, it’s village isone of the areas prone to landslide, this can be seen the existence of land subsidence that has occurred more than once in the same place and of the circumstances surrounding the research that was once a forest area, now used as farmland by human residents. One method used in this research is using geoelectric resistivity method. The data has obtained from geoelectric results, in the entire area has a type of clay and sand, whereas in areas that are kind of soil is a decline in soil, addition of these data, hazardous Jombok Village, Hamlet Songkorejo demonstrated the value of score susceptibility of 3.85, where the value is included in the category of susceptible/prone.

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