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Jurnal Teknosains
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Core Subject : Engineering,
JOURNAL TEKNOSAINS, is a journal which began publication in 2011, and is published each June and December. JOURNAL TEKNOSAINS is a series of scientific publications in science and technology area from the perspective of a multi and interdisciplinary studies. JOURNAL TEKNOSAINS is an interdisciplinary forum for the publication of original peer-reviewed, contributed and invited articles to improve and enhance science and technology. The journal provides a stimulating and informative variety of papers geared toward theory and practice in the hope that common information shared among a broad coalition of individuals and groups involved in science and technology will facilitate future efforts. JOURNAL TEKNOSAINS published by the Graduate School of Gadjah Mada University. All articles will be subjected to double-blind peer review process following a review by the editors.
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Articles 8 Documents
Search results for , issue " Vol 5, No 2 (2016): June" : 8 Documents clear
EFFECT OF NON DENTAL GLASS FIBER ORIENTATION ON TRANSVERSE STRENGTH OF DENTAL FIBER REINFORCED COMPOSITE Khalil, Abdulghani Ali; Siswomiharjo, Widowati; Sunarintyas, Siti
Jurnal Teknosains Vol 5, No 2 (2016): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (942.867 KB) | DOI: 10.22146/teknosains.9131

Abstract

FRC is widely used in dentistry especially for dental bridges construction. E glass fiber is commonly used because it has good properties and good bonding with polymers. Its availability is limited and its price quite expensive in Indonesia. Non dental glass fiber is available in Indonesia with lower price. The aim of this research was to evaluate the effect of non dental glass fiber orientation on transverse strength of dental FRC. Non dental glass fiber (HJ, China) with two orientations (Roving and Woven roving), Flowable composite (CharmFil Flow, DenKist, Korea) , Silane coupling agent (Monobond S, Ivoclar Vivadent, Liechtenstein) and distilled water. 24 specimens of non dental glass FRC, divided into 2 groups. The specimens was immersed in water for 24 hours and 7 days. The data were analyzed by Independent sample T-test. T-test analysis showed that for transverse strength with 24 hours water immersion there was a significant difference between the two orientation groups  (p< 0.05). The data of 7 days immersion there was no statistical difference between the groups (p> 0.05). In conclusion: there was different transverse strength between roving and woven roving orientation in dental FRC. 
MENYELAMI ILMU BIOLOGI MOLEKULER DAN GENETIKA DARI BUKU GENOMES 3 Ruspita, Intan
Jurnal Teknosains Vol 5, No 2 (2016): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (198.84 KB) | DOI: 10.22146/teknosains.27665

Abstract

Buku Genomes 3 merupakan buku yang sangat dianjurkan untuk dibaca oleh ilmuwan  di era yang sangat pesat akan perkembangan ilmu pengetahuan dan teknologi, khususnya dibidang ilmu molekuler biologi dan genetika. Penulisan buku ini telah disusun dengan sangat hati hati  agar mudah dipahami oleh pembaca dan dilengkapi dengan CD-ROM yang dapat dilihat dalam dua format, power point dan JPEG.
OPTIMASI FORMULASI SABUN MANDI CAIR EKSTRAK ETANOL RIMPANG JAHE MERAH (Zingiber officinale Rosc. var rubrum) DENGAN METODE SIMPLEX LATTICE DESIGN Putra, Randi Mulyana; Fahrurroji, Andhi; Wijianto, Bambang
Jurnal Teknosains Vol 5, No 2 (2016): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (637.497 KB) | DOI: 10.22146/teknosains.5341

Abstract

Prevention of diseases caused by bacteria can be carried out with the use of antibacterial soap. The use of antibacterial soaps derived from natural one is to plant a red ginger (Zingiber officinale Rosc. var rubrum) which proved to have antibacterial activity. Therefore, preparations to make it more acceptable liquid soap containing antibacterial compounds 6-shogaol, gingerol, and zingiberen from red ginger plant. Simplex Lattice Design is a method which to find a good formula of dosage from. The study aims to determine the optimum formulation liquid soap ethanolic extract of red ginger rhizome using the method of Simplex Lattice Design. Simplex Lattice Design Methods used to optimize the formulation of liquid soap with five formulas with variations in the amount of olive oil and potassium hydroxide (KOH), FI (0%:100%), FII (25%:75%), FIII (50%:50%), FIV (75%:25%), FV (100%:0%). Evaluation of liquid soap ethanol extract of red ginger rhizome (Zingiber officinale Rosc. var rubrum) include an examination viscosity, pH, and free alkali. Physical stability was analized to find higher total response value (R total) as parameter of the optimum formula by Simplex Lattice Design Methods with Design Expert software  version 8.0.7.1. Optimum formula liquid soap ethanolic extract of red ginger rhizome with the proportion of variation base olive oil 98,1%(27,167 g) and potassium hydroxide (KOH) 1,9%(3,99 g). Data obtained physical characteristics test compared with prediction value using Design Expert software version 8.0.7.1. The result showed that physical properties of liquid soap formula optimum didn’t different significantly for easy response.
EVALUASI KOMPLIKASI PLATE EXPOSURE PASCA RESEKSI AMELOBL ASTOMA MANDIBULA DENGAN REKONSTRUKSI PELAT TITANIUM DI RSUP DR. SARDJITO YOGYAKARTA Widiastuti, Maria Goreti; Soesatyo, Marsetyawan HNE; Magetsari, Rahardyan; Tontowi, Alva Edy
Jurnal Teknosains Vol 5, No 2 (2016): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (412.199 KB) | DOI: 10.22146/teknosains.24222

Abstract

Resection of the jaw is a primary option of treatment in mandibular ameloblastoma with bone damage. Mandibular resection will cause mandibular stability disturbance due toloss of some part of the bone. Instability of the mandible can cause aesthetic, physiological, and psychological malfunctioning. To restore its stability, installment of mandibular reconstruction plate on the remaining mandibular by using screws. However, it is not uncommon that plate exposure occurs following mandibular reconstruction, caused by inaccurate adaptation of the plates to the mandibular bone. A  3D stereolithography modelcan help provide the best assesment on the bone defect, plan the making of the more easily pre-operative curved plates and provide more accurate faster surgery time. Objective: To evaluate plate exposure after mandibular resection with titanium reconstruction plates in Dr. SardjitoHospital. Case report: A case was reported on mandibular reconstruction after resection of ameloblastoma with titanium plate performed in Dr. Sardjito Hospital that experienced intra-oral plate exposure and oro-cutaneous fistula on the left mandible. The clinical evaluation showed the curved titanium plate did not adapt well with the remaining mandibular bone; therefore, the titanium plate was removed without replacing it with a new plate. Inappropriate adaptationof curved titanium plate is one of the main causes of plate exposure. The use of a 3D stereolithography model is very helpful for the success of mandibular reconstruction.
PENGEMBANGAN MODEL MATEMATIKA JARINGAN SUPPLY CHAIN DENGAN MEMPERTIMBANGKAN EMISI PADA INDUSTRI DAUR ULANG KERTAS Ali, Asgar; Masruroh, Nur Aini
Jurnal Teknosains Vol 5, No 2 (2016): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (601.245 KB) | DOI: 10.22146/teknosains.8526

Abstract

Recycling is part of the green supply chain management which is developed base on the concept of environmentally friendly industry to respond the various issues regarding the environmental problems of the world. Distribution of recycled products starts from consumers and ends to manufacturing. The objective is to limit the waste in order to save energy and prevent the dumping of hazardous materials into the environment. However there are complexities in the supply chain because of some uncertainties such as the return of recycled product and the environmental impact resulting from the operation of supply chain. In this research, linear programming optimization method is proposed to overcome that problem with maximizing profit is set as the objective function. Emissions resulting from the recycling process are considered in the model. These results indicate that the mathematical model provides profit of Rp. 37.909.659, with 1.137.760 grams of CO2 emissions from the production process, 38.473,4 grams of CO and 5.884,9 grams HC + NOX of transport. While the proposed strategy is use the right vehicles and select the most efficient route according to the paper collected from consumers and sold to manufacturing. For the production process, it is required to add 3 pressing machines and 1 chopped machine, so the capacity of the working hours of 384 hours per month can be increased to 960 hours per month.
ANALISIS VEGF PADA PERGERAKAN GIGI ORTODONTI SETELAH PEMBERIAN SEDUHAN KOPI ROBUSTA ( COFFEACANEPHORA) Herniyati, Herniyati
Jurnal Teknosains Vol 5, No 2 (2016): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (454.728 KB) | DOI: 10.22146/teknosains.22992

Abstract

Background: Orthodontic tooth movement depends on bone remodeling. VEGF plays an important role in bone remodeling in both pressure area and tension area. Robusta coffee contains caffeine, chlorogenic acid and caffeic acid. Caffeine may increase osteoclastogenesis, and caffeic acid has antioxidant effects that may reduce oxidative stress in osteoblasts Objective: To analysis of VEGF of orthodontic tooth movement post robusta coffeesteeping administration. Material and methods: The experimental laboratories research used 16rats  were divided into 2 groups. Group A: the rats were applied with  orthodontic mechanical force (OMF) and group B: OMF + coffee steeping of 20mg /100 g of BW. OMF was conducted by applying  ligature wire with a diameter of 0.20 mm on the molar-1 (M-1) and both incivus of right maxilla. Subsequently, M-1 of right maxilla was moved to mesial  with Niti closed coil spring. Observations were made on days 15 and 22 by taking the gingival crevicular fluid by putting paper point on the gingival sulcus of mesio-and disto-palatal area of M-1 of right maxilla to determine the levels of VEGF using ELISA method. Results: the administration of Robusta coffee steeping increased the levels of VEGF in both compression area and tension area (p <0.05).The levels of VEGF in tension area larger than the compression area(p >0.05).Conclusion: the Robusta coffee steeping administration increased the levels of VEGF oforthodontic tooth movement ,therefore it may improve alveolar bone remodeling process and it may be an alternative to accelerate orthodontic treatment.
OPTIMIZATION OF MUNICIPAL WASTE COLLECTION POINTS IN YOGYAKARTA CITY- INDONESIA Sopha, Bertha Maya; Haryoto, Alditya Perkasa Sri
Jurnal Teknosains Vol 5, No 2 (2016): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4852.546 KB) | DOI: 10.22146/teknosains.27581

Abstract

Uneven capacity utilization seems to be a constant problem in Yogyakarta waste management system. The problem is worsen by lack of a decision tool to evaluate the system and formulate appropriate strategy.This present study therefore aims atevaluatingthe performance of existing waste management systemandoptimizingmunicipal waste collection points. A mathematical model of MixedIntegerLinearProgramming was developed and implemented inLingo 9. Findings show that the current waste management system is associated to daily total cost of about IDR 10 million and capacity utilization of 88%. Scenarios are developed to examine the optimized system. Findings suggest that current municipal waste can be handled with 35 collection points involving 15 depots and 20 containers. The optimized system is corresponding to IDR 6.3 millionand the capacity utilization of 99%, which makes a reduced cost of 37% and an increasedcapacity utilization of 13% in comparison to the performance of the existing system. Based on sensitivity analysis,volume of municipal waste appears to be influential factor toward the total cost and network structure. Limitation of the model is also discussed. 
UJI SITOKSISITAS CAMPURAN RESIN AKRILIK DENGAN KITOSAN SEBAGAI BAHAN GIGI TIRUAN ANTI JAMUR Ismiyati, Titik; Siswomihardjo, Widowati; Soesatyo, Marsetyawan H.N.E.; Rochmadi, Rochmadi
Jurnal Teknosains Vol 5, No 2 (2016): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (720.446 KB) | DOI: 10.22146/teknosains.27580

Abstract

Denture acrylic resin contain monomer residue that can cause allergic reactions and inflammation in the mouth. Chitosan has advantage biocompatible and antifungal. The purpose of this study was to examine toxicity acrylic resin blends with chitosan as denture antifungal in fibroblast cell culture. This study uses chitosan concentration 0.5%, 1%, 2% and 4% of 2.5 ml were blends with acrylic resin. Fibroblast cell cellular responses were assessed using MTT assay. Data at the cell viability analyzes used Anova one path (p <0.05). The results showed the greatest average adsorbansi fibroblast cell in blends acrylic resin was chitosan concentration of 0.5% (0.434 ± 0.119) with 99.810% cell viability, and the smallest average chitosan concentration of 4% (0.385 ± 0.023) and 88.523% cell viability. Anova test showed there were differences the effect of varying concentrations of chitosan significantly to adsorbansi and cell viability (p <0.05). The results of post hoc test showed a concentration of 4% was significantly different than other concentration. Conclusion, acrylic resin blends with chitosan at a concentration of 0.5%, 1%, 2% were non-toxic, being mild toxic concentration of 4%.

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