Jurnal Teknosains
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SCAFFOLD DARI BOVINE HYDROXYAPATITE DENGAN POLY VYNIALCHOHOL COATING
No full textIn Indonesia, it is about 40% patients with hard tissue defect due to ostheoporosis, cancer or accidents and therest are defect since they have born.For many years, efforts for recovering have been done by transplantation orimplantation methods.Transplantation is more appropriate butit is not sustain because of limited donor, whileimplantation using synthetic materials such as bioceramics scaffoldis expensive due to import and the scaffold iseasier to break which does not match to the medical requirements.The research therefore has been addressed to thisissue. Local bovine hydroxyapatite (bHA)scaffold has been used as thebase material and poly vynilalchohol (PVA)as a coating material.The bHA scaffold was prepared by cutting a fresh bovine bone in the size of 5mmx5mmx5mmand boil it in a distilled water to remove its organic material. It was then heated up at 900 oC for 2 hours infurnace to obtain bovine hydroxyapatite scaffold (bHA). Coating process has been carried out by dip coating of thebHAscaffold in PVA solution
SPECIES COMPOSITION OF AMPHIBIAN IN GUNUNGKELIR STREAM, JATIMULYO VILLAGE, KULON PROGO
No full textGunungkelir stream is located in Jatimulyo village, western part of Daerah Istimewa Yogyakarta Province.The ecosystem that surrounds Gunungkelir stream looks natural and unpolluted, it is possible for good livingenvironment of amphibians. However, the database about diversity of Amphibians in Gunungkelir stream hasnot been revealed. This research was done to study species diversity, species richness, species composition anddistribution of amphibians in Gunungkelir stream as an effort to support the sustainability of amphibians livefrom extinction. The research was done on January-May 2009, at night. The VES (Visual Encounter Survey)method with line transects 250 m were used. A total 11 species of amphibians from 6 different amphibia familieswere identified. Phrynoidis aspera, Leptobrachium hasseltii and Hylarana chalconota are dominant species. Thehigest percentage of amphibians population was tadpole (38%), followed by male (35%), female (21%), and theleast were juvenile (6%). During the survey, different species of amphibians were observed with their own rangeof spatial distribution
KAJIAN PENCEMARAN LINGKUNGAN DI TAMBAK UDANG DELTA MAHAKAM
No full textwell-managed, it will contribute to the improvement of both regional and national economy. However, MahakamRiver gets liquid waste pollution that has significant impact on water quality and results in conflicts betweenthe local societies, especially the shrimp pond farmers and the fishermen and the oil and gas industrial company.This research uses descriptive-comparative analysis with ANOVA test to compare samples (water, soil/sediment,shrimp, and mangrove) of the shrimp fishpond (many mangrove, moderate mangrove, few mangrove, and withoutany mangrove). The pollution load which is analyzed includes: cadmium content (Cd), lead (Pb), oil and grease (O& G), mercury (Hg), and arsenic (As). The significance level is 90% with error of 5% (0.05).The water of Mahakam Delta is still in the normality limit as seen from the maximum pollution load in the Decreeof the Minister of Living Environment No. 51 of 2004 on Ocean Water Standard seen from chemical, physical,and biological parameters. The presence of mangrove contributes positive value to the balance of the quality of thewaters and to the neutralizing of heavy metals contents of Mahakam Delta as shown in the average difference inthe Pb, Cd, O & G, As and Hg of the samples of water, soils/sediment, shrimp and mangrove which are drawnfrom the of shrimp pond with many mangrove, moderate mangrove, few mangrove and without any mangrove,which is significantly different (p < 0.05). Shrimp pond with many mangrove has less average levels of Pb, Cd, M& L, As and Hg compared with the pond with less and without mangrove. The shrimp pond with many mangrovescontributes significantly and positively to the prevention of the pollution of Pb, Cd, O and G, As and Hg at low leve
ANALISIS INTANGIBLE FACTORS YANG MEMPENGARUHI PENENTUAN HARGA PRODUK KARYA SENI
No full textThis research aims to develop a new quantitative method to determine painting pricing based on 10 intangible factors, i.e. curator, amount of exhibition, painter’s year of birth, painting’s years of made, auction record,estimation price, exhibition place, painting media, painting size, and previous sales record. The selling price data are obtained from six auction houses. Kano Model and Linear Regression Model are used to examine the relationbetween pricing and each variable. Based on the model development scheme, there are 6 alternative models that can be obtained. Each model then was evaluated by cross-validation procedure using 21 data. Based on the value of R2for each model, the Kano Model with variable previous sales is the best model with R2 of 70
EFEK APLIKASI SERICIN PADA HIDROKSIAPATIT TERHADAP PERLEKATAN SEL OSTEOBLAS
No full textHydroxyapatite (HA) is often used as a human bone graft. Modification of HA surface is developed to increase osseointegration process which is influenced by cells attachment surrounded the tissue. Sericin has polar side groups which accelerate cells attachment. The aim of this research was to determine the effect of sericin application over HA surface on the attachment of osteoblast cells. The research used HA synthesized from gypsum (Kulon Progo, Yogyakarta). Sericin was extracted from silkworm cocoons of Bombyx mori. Sericin of 0.01, 0.05, 0.1% were applied over HA discs surface (10 mm in diameter, 3 mm thick). The discs were inserted into osteoblast cells culture of MC3T3E1 for attachment test. The data were analyzed by ANOVA and LSD. The result showed that the amount of osteoblast cells attached to HA (7.60±0.42) was significantly difference (p0.05). In conclusion, sericin application over HA surface increased the amount of osteoblast cells attachment. Concentrations of sericin application over HA (0.01, 0.05, 0.1%) did not influence osteoblast cells attachment
EKSPLORASI KEANEKARAGAMAN HERPETOFAUNNA DI KECAMATAN GIRIMULYO KABUPATEN KULON PROGO YOGYAKARTA
No full textThe research was aimed to reveal and document hereptofauna from Girimulyo District Kulon Progo Regency,Daerah Istimewa Yogyakarta Province. This research was done from November-Desember 2008 and January-April 2009 in four research locations were Girimulyo, Jatimulyo, Giripurwo and Purwosari. The VES (VisualEncounter Survey) method were used and combined with interview method.. A total of 40 species of herpetofaunaare indentified and includes in to 13 family. Among 40 species, only one (Michrohyla achatina) is endemic to Java.The commonest herpetofaunas along all site were Eutropis multifasciata and Hylarana chalconota
KAJIAN METODE DETEKSI DEGRADASI HUTAN MENGGUNAKAN CITRA SATELIT LANDSAT DI HUTAN LAHAN KERING TAMAN NASIONAL HALIMUN SALAK
No full textThe study examined detection method of forest degradation using forest canopy density (FCD), maximum likelihood, fuzzy and belief dempster shafer classification method. Accuracy evaluation of classification and detection were based on overall accuracy which obtained from 51 ground sample plot. Canopy density, LAI, crown indicator, trees density and basal area (Lbds) were conducted as field indicators. Accuracy of classification among forest density (trees/Ha) with four classification methods were FCD 61%, maximum likelihood 57%, fuzzy 51% and belief dempster shafer 49%. Based on temporal detection accuracy from 2003 until 2008, FCD had overall accuracy 68 %. The result of research, FCD is the best method to detect of forest degradation.
THERMAL CHANGES OBSERVED AT DRILLING SITE DURING BONE DRILLING Model study in bovine rib
No full textoai:journal.ugm.ac.id:article/3985The use of bone drill in the process of odontectomy and preparation of dental implant may increase temperature around drilling hole. As thermal changes are the critical precursor to physiological bone healing, increased of temperature over threshold must be minimized. The aim of this model study was to compare the temperature changes that were generated during bone drilling with various speeds. Eighteen fresh bovine ribs were chosen due to the similarity of physical properties and dimension of human mandible. A constant drill load of 4.06N was applied throughout the drilling procedures via a drilling rig. Bovine ribs were drilled by using the same bur geometry (twist drill, 120 point angle) at low speed (8.750 rpm, 21.875 rpm, 35.000 rpm). The bone temperature changes generated by the drilling process were measured measured by K-type thermocouple. The speed of 8750 rpm produced a maximum temperature changes in both distance of 1 mm and 2 mm from drilling hole. Minimal temperature changes were recorded for the speed of 35.000 rpm. ANOVA test, showed the mean of thermal changes for each of speed at distance 1 and 2 mm from drilling hole. The clinical benefits of using speed below 35000 rpm need to be considered due to the potential risk of thermal damage
MENUMBUHKAN NADI BARU
No full textPada tahun 1997, dunia dikejutkan oleh suatu film dokumenter dalam program Tomorrow`s World serial BBC. Di dalam tayangan BBC menyiarkan tentang Vacanti Mouse, seekor tikus dengan daun telinga yang tumbuh di punggungnya. Sekalipun penelitian aslinya (seperti yang diakui oleh kelompok Cao dan Vacanti) yang berlangsung di laboratorium MIT (Massachussets Institute of Technology) tidak se-spektakuler seperti tayangan BBC, sejak saat itu istilah rekayasa jaringan (tissue engineering) menjadi istilah yang dikenal oleh jutaan masyarakat dunia. Harapan manusia akan adanya The Body Shop (yang setiap waktu dapat menyediakan organ tubuh pengganti) menuai titik terang
ANALISIS POTENSI ENERGI DI DESA WUKIRSARI KECAMATAN IMOGIRI KABUPATEN BANTUL PROPINSI DAERAH ISTIMEWA YOGYAKARTA
No full textDengkeng, Kobango, Giriloyo, and Nogosari II are places in the Wukirsari village which experience water scarcity. Water supply system (WSS) is proposed to fulfill water for 1,088 persons. The WSS need energy for pumping amount 88.47 kWh per day. Based on Atmospheric Data Science’s datas, obtained that the average of wind velocity in Imogiri is 4.20 meters/second and 50.00 meters in height above the sea level. The standard of wind velocity to build wind power generation is must more than 3.00 meter/second so enable to design in another turbine height. By region coefficient (α) 0.30, is obtained turbine height alternative 18.17 - 50.00 meters in range. By varied wind velocity base on that range obtained wind velocity average amount 3.70 meters/second and 32.17 - 33.17 meters in height range. Based on WSS’s lifetime and wind specific mass, obtained power per wide unit 21.06 W/m2 and energy 0.02 kWh/m2 each day