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Journal of Enviromental Engineering and Sustainable Technology
Published by Universitas Brawijaya
ISSN : 23563117     EISSN : 23563109     DOI : -
Core Subject : Social,
Environmental Science
JEEST is an interdisciplinary and refereed journal, addresses matters related to environmental engineering and sustainable technology. Its range of themes encompasses ecological studies, field research, empirical work and descriptive analyses on topics such as environmental systems, environmental policies and politics, environmental legislation, environmental impact assessment, air, water and land pollution, water and energy related issues, engineering innovations, development, technical solutions and sustainability technology. Other matters related to or which influence the international debate on sustainability will be also considered.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 6, No 1 (2019)" : 5 Documents clear
THE SELECTION TECHNIQUE OF BULBIL PORANG (Amorphophallus muelleri Blume) BASED ON GROWTH RESPONSE Qurrota A'yun
Journal of Environmental Engineering and Sustainable Technology Vol 6, No 1 (2019)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Bulbil is a vegetative reproductive organ which is located on center and site of branching of porang leaf. The purpose of this study was to determine growth response between the center bulbil, the 1st- and 2nd- branch bulbils.All bulbils were obtained from 2 years old porang which has petiole with height 119.8 – 120 cm. All porang previously were cultivated in Rejosari Village, Bantur District. The harvested Bulbils were grown in a polybag (15x15 cm) which contain mixture of soil, manure, cocopeat and husk charcoal (5:3:1:1). The unit experiment where each types bulbilwas grown has 3 replications. Each replicate consisted of 15 plants. The experiment was organized by completely random designed. The ANOVA test was applied to all data. The result showed that differences in source the bulbil in term position(center bulbil, 1st- and 2nd- branch bulbils) significantly affected the time for appearance 1st shoot, germination rate and germination uniformity. The petiole height-diameter and the canopy width of porang plants were affected by source of bulbil as well. The best results for all parameter were given by seeded-bulbil derived from center bulbil. All the bulbils produce more than one shoots in one planted bulbil.DOI: http://dx.doi.org/10.21776/ub.jeest.2019.006.01.5
ABIOTIC FACTORS AS INDICATORS OF THE ABUNDANCE OF PENJAH FISH OF THE GOBIIDAE FAMILY IN THE MAPILLI RIVER ESTUARY, POLEWALI MANDAR DISTRICT, WEST SULAWESI Fitri Fitri
Journal of Environmental Engineering and Sustainable Technology Vol 6, No 1 (2019)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2019.006.01.1

Abstract

The aim of this study was to determine the effect of abiotic factors on the abundance of tilapia in the family of Gobiidae in the river of the Mapilli estuary. Sampling was carried out in two locations at three points each repeated three times. Samples were taken using a fish net by attaching to the edge of the river mouth and waiting for five minutes. Data collection for each station includes brightness, temperature, pH, salinity, current speed, conductivity, and the number of fish caught. The results showed that the abiotic factor had a significant influence on the abundance of penjah fish because at the time of abundance the migration season of fish heading to the estuary and in the Mapilli river had water conditions which were still suitable as a place to find food for Penjah fish when migrating. Abiotic factors that affect the abundance of anchovy fish in January, namely salinity, in March are influenced by current velocity, in April and May are influenced by temperature, current speed and brightness with the most abundant number of fish. Spread fish is the dominant species found in all locations and stations. The number of Penjah fish found during the research conducted over five months showed that the average appearance of anchovy fish fluctuated. The lowest abundance in February was 0, while the highest abundance occurred in April of 453 Tails.
INCREASED TENSILE STRENGTH OF DISSIMILAR FRICTION WELD JOINT OF ROUND BAR A6061/S15C USING UPSET FORCE AND ONE-SIDE CHAMFER ANGLE Yudy Surya Irawan; Dwi Prasetyo; Teguh Dwi Widodo; Wahyono Suprapto; Tjuk Oerbandono
Journal of Environmental Engineering and Sustainable Technology Vol 6, No 1 (2019)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2019.006.01.2

Abstract

An effort to increase the tensile strength of dissimilar friction weld joint of round bar A6061/S15C was done in this study using upset force and one-side chamfer angle. Commercial round bar aluminum alloy A6061 and carbon steel S15C were used as rotated and a stationary part, respectively in continuous drive friction welding (CDFW) process. Upset force variations of 10.5, 14, and 17.5 kN were used. CDFW process used burn of length of 15 mm for all CDFW specimens. Chamfer angle was machined on friction area of the S15C stationary part with the variation of 0 (without chamfer angle), 30 and 45 degrees. Tensile strength test, macrostructure observation and micro Vickers hardness testing, SEM-EDX analysis were performed. It was found that the smaller chamfer angle (30 degrees) produced maximum tensile strength of A6061/S15C CDFW joint. It occurred due to smaller formed flash, the lower temperature of the flash that indicate lower heat input and caused smaller heat affected zone and higher hardness in the CDFW joint. The higher upset force also yields higher tensile strength of CDFW joint due to the higher degree of plastic deformation during the upset stage of CDFW joint and this state contributes to higher hardness and tensile strength of A6061/S15C CDFW joint. SEM-EDX analysis result also confirmed that more aluminum existed on the fracture surface of the A6061/S15C CDFW specimen with maximum tensile strength.
TECHNIQUE FOR SUSTAINABLE DEVELOPMENT ALONG TRISULA WATERFALL (COBAN TRISULA) - RANU PANI, BROMO TENGGER SEMERU NATIONAL PARK: A CASE OF EPIPHYTIC ORCHID CONSERVATION Afifah Nur Aulia
Journal of Environmental Engineering and Sustainable Technology Vol 6, No 1 (2019)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2019.006.01.3

Abstract

The purpose of this study is to develop a technique for sustainable development of epiphytic orchid conservation, identify the types of epiphytic orchid host trees and identify the types of epiphytic orchids along the Trisula waterfall (Coban Trisula) to Ranu Pani. This research was conducted in October 2018 - April 2019 in Trisula waterfall (Coban Trisula) to Ranu Pani. A floristic survey with 9.3-miles exploration in Trisula waterfall (Coban Trisula) to Ranu Pani. Observation of host trees was carried out by observing individual morphological characteristics and referring to the Orchids of Java literature. It is important for the reforestation of potential trees that can be used as hosts by epiphytic orchids and the limitation of the function shifting of land as settlements, agriculture, plantations so, the forest area is wider and the epiphytic orchids are increasingly preserved. Identification of host trees and identification of epiphytic orchids need to support sustainable development as an effort to conserve epiphytic orchids. The types of host trees, they are: Kukrup (Engelhardtia spicata), Cemara gunung (Casuarina junghuhniana), Anggrung (Trema orientalis), Dadap putih (Acer laurinum), Trete (Celtis sp.), Bangkongan (Turpinia spaenocarpa), Suren (Toona sureni), Pamoung (Macropanax dispermus), Pasang (Lithocarpus sundaicus), Tutup (Mallotus paniculatus), Genitri (Elaeocarpus ganitri) and Astronia spectabilis. The types of epiphytic orchids found are Eria moluccana, Schoenorchis juncifolia, Vanda limbate, Agrostophyllum sp., Appendicula sp., Bulbophyllum macrantum, Bulbophyllum miniatum, Bulbophyllum obtusipetalum,  Bulbophyllum sp. I, Coelogyne miniata, Dendrobium linearifolium, Dendrobium hasseltii, Dendrobium sanguinolentum, Dendrochilum sp., Eria bogoriensis, Eria hyacinthoides, Eria longifolia, Flickingeria aureiloba, Liparis parviflora, Thrixspermum subulatum, Tuberolabium odoratisimum, Vanda tricolor
UV VIS STUDY IN INTERACTION ASTAXANTHIN AND GLYCATED BSA Muhammad Irsyad Nur
Journal of Environmental Engineering and Sustainable Technology Vol 6, No 1 (2019)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2019.006.01.4

Abstract

Astaxanthin antioxidant activity  has been reported to be more than 100 times greater than that of vitamin E against lipid peroxidation and approximately 550 times more potent than that of vitamin E for singlet oxygen quenching. The purpose of this study is to find out the best concentration of astaxanthin to reduce the uv absorbance from BSA glycated by using UV spectroscopy. Astaxanthin was dissolved in methanol at concentration (1 x 10-9– 1x10-10 mol/L) different concentrations, then added to BSA glycated 100mM and 500mM then observed with UV spectroscopy. From the UV spectroscopy observations at 284 nm wavelengths, the best results for astaxanthin concentration is 0.2x 10-9 and 1x10-10 mol/L , it shows the best concentration  on its effect to reduce the absorbance on BSA conformation

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