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Environmental Science

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Articles 8 Documents

Search results for , issue "Vol 3, No 4 (2016)" : 8 Documents clear

Application of 3D Resistivity Method for Distribution of Seawater Intrusion in The Tanah Mas Residential North Semarang Andya Satya Purnomo Putro; Supriyadi Supriyadi; Khumaedi Khumaedi
Natural B, Journal of Health and Environmental Sciences Vol 3, No 4 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

The seawater intrusion into the groundwater in Tanah Mas residential North Semarang was investigated by chlorides ion levels from production wells and 3D electrical resistivity profiling. Tanah Mas residential area is a densely populated area located in the northern coastal city of Semarang. At the area, the exploitation of groundwater through production wells is quite high, that potential to produce the phenomenon of seawater intrusion. Analysis of groundwater samples from production wells was carried out as an early indication of the seawater intrusion in the study area. The profiles acquired across the study area, using a multi-electrodes acquisition system in a Wenner array configuration by electrode spacing of 10 m were used for the profiling. The results of groundwater chemical testing, there are three groundwater samples that has high levels of chloride ions. Three groundwater samples have the high levels of chloride ions that are in wells F, J and M. Apparent resistivity data of the 2D profiles over the models were collated to 3D data sets for each array studied. From 3D electrical resistivity profiling, obtained the distribution of seawater intrusion that has reached the north, east and south of Tanah Mas residential.

Ch2FCF3 Gas Flow Rate Effects of SiO2 Plasma Etching Rate on Quartz Crystal Microbalance Antonius Prisma Jalu Permana; Dionysius Joseph Djoko HS; Masruroh Masruroh
Natural B, Journal of Health and Environmental Sciences Vol 3, No 4 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

Effect of gas flow rate on the surface of quartz crystal SiO2 during plasma etching was studied. The etching process was applied using the capacitively coupled plasma (CCP) reactor generated with 100 W power AC generator at low frequency of 40 kHz using a gas flow of CH2FCF3. The main objective of this study was to determine the effect of changing gas flow rate on the plasma etching rate on the SiO2 surfaces. Gas flow rate was varied between 20-40 mL/min, while keeping all other plasma parameters constant. The etched surface of SiO2 was analyzed using white-light profilometer (Topography Measurement System (TMS 1200 Micro Lab)). The results show the physical etching processes influenced the rate of etching at a low gas flow rate, while the higher flow rate influence reactive ion etching (RIE) in the etching process. The maximum etching rate is found at 7.753 nm / min achieved in plasma etching process.

Utilization of Medicinal Plants in Kayukebek Village, Tutur District, Pasuruan Regency Agung Witjoro; Sulisetijono Sulisetijono; Frida Kunti Setiowati
Natural B, Journal of Health and Environmental Sciences Vol 3, No 4 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

Traditional medicine using herbs has been known and done since the first generations by the people of Indonesia. Tutur area is located in the district of Pasuruan, East Java Province. One of the villages in the Tutur area is Kayukebek. The community Kayukebek have knowledge about the advantages of plants as a medicine for specific diseases or health problems. The study aims to: 1) To obtain information the types of plants used as a medicine; 2) To know the various uses of herbs; 3) To determine the perception and appreciation of the herbs from the Kayukebek community. This research is a descriptive explorative study. The method performed in the exploratory survey data collection by direct observation in the field and Participatory Rural Appraisal methods. Community engagement obtained through interviews with semi-structural and open-ended based question list. Sampling technique used is purposive sampling and snowball sampling. The value of the use of plants known by the value of Informant Concencus Factor and Use Value. The results, recorded 22 plants species have been used in this community as traditional medicine, include: garlic, tropong onion (scallion), plantain, dlingo, ceplukan, jambu wer, senggani, blencong, tamarind, kecubung, mustard greens, cabbage, fennel, turmeric, ginger, pulosari, sendokan, corn, white wood, sempretan (brojo lintang), gorogo, and wono ginger. It was observed that the local people are less aware of the medicinal plants. It is seen the public perception of the use medicinal plants is low (48.03%) meanwhile the appreciation medicinal plants are prefer to low category (49.69%).

Environmental Geological Condition and Ground Water Bearers Relationship on Kebakalan Area, Kebumen - East Java Nandian Mareta; Edi Hidayat
Natural B, Journal of Health and Environmental Sciences Vol 3, No 4 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

Kebakalan and sorrounding included in area of Karangsambung Geological Natural Preservation (CAGK). As part of CAGK, geology Kebakalan and sorrounding area including Luk Ulo Melange Complex age Pre Tertiary expose in Java. These rocks are composed of scaly clay matrix with component in the form of block of igneous, sedimentary and metamorphic rocks. Many human activities is never separated from water using. These condition make that a region can maintain the quality and quantity of water resources. Avalaibility water resources of an area should be able to meet the water needs to water expected so balancing of two is happened. Rapid population growth in Kebakalan can increase needs for water resources for fullfillment of their needs. Water resources consist of surface and subsurface water (groundwater). The main purpose of these study is to determine the relationship between geology and groundwater conditions in Kebakalan and sorrounding an effort to overcome the droughts that frequently hit the area. The research method used two approaches that are primary and secondary data collection. The results showed there were eight units of geologic environments, in which two units are units hills sloping sandstone and alluvium plains unit is a good rock as aquifers. While the direction of groundwater flow from north to south with a depth of 4-8 m wells and groundwater levels 55-70 m. The villages that have potential for shallow ground water is Kedungnangka, Jambekerep, Jombor Kidul, Polaman, Panunggalan, Kebakalan and Gagakbaning with an area 462 ha (44%).

Determination of Neutron Spectrum at LINAC Using a Passive Single Sphere Spectrometer Muhammad Helmi Hakim; Chomsin Sulistya Widodo; Bunawas Bunawas; Rasito Rasito
Natural B, Journal of Health and Environmental Sciences Vol 3, No 4 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

Neutron spectra at Linear Acceleration (LINAC) facility was needed to protect neutron radiation. The purpose of determination of neutron spectra at LINAC using Passive Single Sphere Spectrometer is getting spectra and neutron fluence from LINAC and knowing the influence of input voltage at LINAC to its spectra and neutron fluence output. Single Sphere Spectrometer (SSS) with diameters 30 cm using seven gold foil detectors was set in position a half of diameter (0, 3, 6, 9, 11, 12, 13 cm) from center of the SSS. Measurement of neutron count rate was performed by placing SSS under gantry of LINAC with SSD 100 cm in distances. Next, neutron count rate was used as input data in UMG 3.3 program to get spectra. Based on measurement, total of neutron fluence at LINAC 10 MV and 15 MV is 5,78 ´ 104 n/cm2.s ± 0,01 ´ 104and 9,44 ´ 105 n/cm2.s ± 0,22 ´ 105, so increasing input voltage at LINAC was followed by increased neutron fluence.

Electrical Impedance Value Analysis on Formalinized Tilapia Fish Meat Putri, Rizka Rahmatie Agusta; Widodo, Chomsin Sulistya; Santoso, Didik Rahadi
Natural B, Journal of Health and Environmental Sciences Vol 3, No 4 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

Electrical impedance can be used as a non-destructive method to determine the bio-electrical characteristics on biological materials. Analysis of the electrical impedance value by using an electrode needle method has been applied to the tilapia flesh which aims to determine the bio-electrical characteristics on tilapia flesh, and determine the effect of formalin on it. The measurements were carried out to compare the characteristics of bio-electrical characteristics of the fresh tilapia flesh, the tilapia flesh soaked in formalin, and the one that was lay without any preservation treatment at a 10 Hz - 200 kHz frequency. The result shows that the impedance value characteristics of the fresh tilapia flesh decreased as long as the increase of frequency. Both the preserved and the rotten tilapia flesh have the decreased impedance value. The concentration of formalin immersion is directly proportional with the value of electrical impedance.Â Â

Potential of Sugar Cane As an Alternative Raw Material for Making Activated Carbons A.S. Dwi Saptati Nur Hidayati; Silva Kurniawan; Nalita Widya Restu; Bambang Ismuyanto
Natural B, Journal of Health and Environmental Sciences Vol 3, No 4 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

This research studied to utilize the bagasse to be used as activated karbon in particular for the adsorption of Ca2+. The manufacture of activated carbon consists of carbonization dan activation process. Temperature variation for carbonization process in this research are 500°C, 550°C, 600°C, 650°C and 700°C then proceed with the activation process by carbon reflux with 6 M H2SO4 for 4 hours. Carbonization yield will decrease with increasing temperature carbonization. While the ash content, surface area, pore volume, and adsorption capacity of Ca2+ will increase with increasing temperature of carbonization. Obtained activated carbon is best activated karbon made at a temperature of 700°C with an activation carbonization which has a surface area 100.62 m2/g, 22.3750 Å pore diameter, pore volume of 22.376 mL/g, can eliminate the Ca2+ up to 13.26 %.

Effects of Quadrifide Sterculia R. Br Extract on Potential of Membrane of Oreochromis Niloticus Egg Cell Resulting from Pb Contamination Fetronela Rambu Bobu; Chomsin Sulistya Widodo; Johan Andoyo Effendi Noor
Natural B, Journal of Health and Environmental Sciences Vol 3, No 4 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

The effect of faloak (Sterculia quadrifida R.Br.) extract to the cell membrane potentials of tilapia (Oreochromis nilaticus) egg in contaminated water lead was studied. The cell membrane potential of tilapia egg was measured by a microelectrode connected to a Picoscope. The result showed that increasing of the Pb consentration caused decreasly of the membrane potential. Faloak extraction in contaminated water raised the membrane potential value. The concentration of faloak extract with the impact of raising the cell membrane potential of tilapia egg that have been contaminated by Pb is 0,8 mg. It seems that the antioxidant of faloak extract can reduce pollution rate.

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