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INDONESIA
Natural B
Published by Universitas Brawijaya
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Core Subject : Social,
Environmental Science
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Articles 5 Documents
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Search results for , issue "Vol 5, No 1 (2019)" : 5 Documents clear
Antimicrobial Potential of Methanol Extract from Kastuba Leaf (Euphorbia pulcherrima Willd.) Atwazah Taisir Ibrahim; Kurniasih Suketi; Dyke Gita Wirasisya
Natural B, Journal of Health and Environmental Sciences Vol 5, No 1 (2019)
Publisher : Natural B, Journal of Health and Environmental Sciences

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Abstract

Some bacteria have been resistant to one or more types of antibiotics, so an effort to find new antimicrobial sources based on medicinal plants is needed. Research that has been done shows that there are 22 types of plants used as wound treatment used by local people of Timbanuh, East Lombok, one of them is kastuba (Euphorbia pulcherrima Willd.). This study was conducted to test the antimicrobial potential of kastuba leaf extract which has been used ethnomedicinely as a wound teratment in Timbanuh. The antimicrobial activity of kastuba extract was tested against Staphylococcus aureus bacteria. This test used 4 samples. Sample 1 (leaf part 1-5, wind dry method), samples 2 (leaf part 6-10, wind dry method), samples 3 (leaf part 11-15, wind dry method), and sample 4 (leaf part 11-15, oven dry method). The measurement of the antimicrobial potential was carried out by the well diffusion method. The results showed that kastuba leaf extract (samples 1 to 4) at concentration 10 mg / 100µL had a inhibition zone of 9,208; 10,041; 10,583; 11,541 mm and 11,85; 12.08; 14.25; 15.92 mm at concentration 20 mg / 100µL. Sample 4 showed larger inhibition zone affected by different drying method used. The conclusion of this study is kastuba leaf extract has the potential as an antimicrobial.
Identification of Aquifers Distribution using Geoelectric-Resistivity Method with Schlumberger Configuration in Gedangan Village, Malang Regency Ahmad N. Faris; Daeng A. Suaidi; Sutrisno Sutrisno; Muhammad Fathur Rouf Hasan; Agung B. Broto
Natural B, Journal of Health and Environmental Sciences Vol 5, No 1 (2019)
Publisher : Natural B, Journal of Health and Environmental Sciences

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Abstract

Drought is one of the problems in Gedangan Village during the dry season. So that district needs more groundwater resources. The geoelectric-resistivity method usually used for groundwater exploration. This method used for identifying changes in the resistivity of rock layers beneath the earth's surface by flowing direct current (DC). This research intends to identify the pattern of groundwater distribution using the geoelectric-resistivity method with Schlumberger configuration in Gedangan Village, Gedangan District, Malang Regency. Thirteen VES points were obtained by Schlumberger configuration and each long stretch until 400 m. Then each the two parallel VES points arranged to obtain a 2D cross-section. The results indicate this area surrounded by karst and it has lithology consists of sandy marlstone, claystone, and limestone. The resistivity value is between 1.41 - 8.28 Ωm identified as sandy marlstone and it presumed as an aquifer. The aquifers with large amounts of groundwater are in the VES point lines of 01-02, 03-04 and 04-05. These lines are located in the south of the Gedangan district office and the police station.
The Effect of Egg White Addition to Increase the Tensile Strength of Organic Planting Ribbons Lintang Ayu Rengganingrum; Johan Andoyo Effendi Noor; Lailatin Nuriyah
Natural B, Journal of Health and Environmental Sciences Vol 5, No 1 (2019)
Publisher : Natural B, Journal of Health and Environmental Sciences

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Abstract

Egg white contains high protein. Egg white acts as supporting matrix as well as adhesive and organic preservation. Organic planting ribbon based on mixture of water hyacinth with banana stalk is a supporting material for planting purpose, especially for rice planting system. This ribbon is in the form of a rice seed filled ribbon. The application of organic rolling tape in rolls and then lengthwise requires a high level of tensile strength so as not to tear easily. Variations of egg white composition are added to the organic planting tape to increase the value of its tensile strength. The tensile strength test was performed by Force Gauge physical properties i.e. shape, modulus, and density to determine density and strength of adding egg white as a matrix amplifier on the organic plant tape filler. Measurements were made by simulating the planting of rice planted with organic tuna with egg white and without egg whites which watered once every five days for sixty days. The results obtained are compared for analysis and drawn conclusions. The best data obtained for the addition of 250 grams of egg whites respectively for the value of tensile strength of 0.112 N / mm (before planting simulation) and 0.058 N / mm (after planting simulation) with the ability to survive around the age of 50 days.
The Antibiofilm Activity of Jatropha curcas L.Latex on Staphylococcus aureus ATCC 25923 Rosmalinda Utami; Siti Rahmatul Aini; Dyke Gita Wirasisya
Natural B, Journal of Health and Environmental Sciences Vol 5, No 1 (2019)
Publisher : Natural B, Journal of Health and Environmental Sciences

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Abstract

Nosocomial infections worldwide shows high rates. One of the causes of nosocomial infections is Staphylococcus aureus. S. aureus as an infectious pathogen is known to form biofilms that often cause failure of antibiotic therapy. Jatropha is one of the plants used by the community in treating various diseases, including infections. The purpose of this study was to determine the jatropha latex antibiofilm activity on S. aureus by microdilution method with crystal violet staining. The results showed that jatropha latex extract had antibiofilm activity, with biofilm inhibition percentages of 150% at concentrations of 0.625 mg/mL, while percent degradation was 189% at concentrations of 5 mg/mL. Jatropha latex extract had biofilm inhibition activity at extract concentrations of 0.625 mg/mL and biofilm degradation at extract concentration of 5 mg/mL. The result of this study can be used as topical drugs for infectious wounds.
Analysis of The Distribution of Geothermal Potential and The Manifestations in Ijen Volcanic Complex Based on Land Surface Temperature and Geomorphology Bowo Eko Cahyono; Nurfaizatul Jannah; Agus Suprianto
Natural B, Journal of Health and Environmental Sciences Vol 5, No 1 (2019)
Publisher : Natural B, Journal of Health and Environmental Sciences

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Abstract

Indonesia's geographical conditions which are at the confluence of three tectonic plates contribute to the availability of geothermal energy. The first step that can be taken in geothermal potential exploration activities is to study the characteristics of geothermal potential areas. In this case the study of the characteristics of geothermal potential will be carried out in the Ijen Mountains complex. This study aims to analyze the distribution of geothermal potential based on land surface temperature, and geothermal manifestations based on the association of land surface temperature and geomorphology. Remote sensing data used in the study were Landsat 8 images acquired in September 2013, 2015, and 2017. The results showed that geothermal potential areas were in the interior of the Ijen Mountains caldera with a temperature anomaly of 26-50 °C which was dominated by high greenish vegetation. While some geothermal manifestations that have been recorded are known to be associated with lineament that intersects with high land surface temperatures, so that the lineament that has the potential to be a fluid discharge pathway for geothermal manifestations is lineament that consistently intersects with high land surface temperatures in September 2013, 2015, and 2017 with the Southeast-Northwest and Southwest-Northeast orientations.

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