Article Per Year (5 Year)
p-Index From 2020 - 2025
0.444
P-Index
This Author published in this journals
All Journal Jurnal Kedokteran dan Kesehatan : Publikasi Ilmiah Fakultas Kedokteran Universitas Sriwijaya Jurnal Ilmu dan Teknologi Kayu Tropis Jurnal Ekonomi dan Bisnis
Abdurachman Abdurachman
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance Medicine & Pharmacology Neuroscience Public Health

Published : 5 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 5 Documents
Search

 1 
PENGARUH SHIELDING ALUMINIUM FOIL TERHADAP PERUBAHAN KETEBALAN LAPISAN EPITEL KORNEA AKIBAT PAPARAN RADIASI GELOMBANG ELEKTROMAGNETIK PADA TIKUS WISTAR JANTAN Dion Krismashogi Dharmawan; Viskasari P Kalanjati; Abdurachman Abdurachman
JURNAL KEDOKTERAN DAN KESEHATAN Vol 7, No 2 (2020)
Publisher : Fakultas Kedokteran Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32539/JKK.V7I2.11100

Abstract

Ponsel telah diketahui memancarkan radiasi gelombang elektromagnetik (RGEM) yang digunakan sebagai media dalam telekomunikasi. Dampak buruk akibat paparan RGEM dapat terjadi pada lapisan epitel kornea mata yang secara anatomis terletak pada bagian anterior. Kami melakukan penelitian potensi aluminium foil (AF) sebagai perisai terhadap RGEM yang diukur dengan membandingkan ketebalan lapisan epitel kornea mata tikus kelompok kontrol dan perlakuan. Masing-masing tikus dimasukkan ke masing-masing kandang paparan secara terpisah. Sumber paparan RGEM berupa ponsel GSM 2100 (Taiwan) dengan SAR 0,84 – 1,86 W/kg yang tersambung wifi yang diletakkan di bagian bawah setiap kandang paparan tikus dengan paparan 4 jam /hari. Sejumlah 32 tikus dengan usia 2-3 bulan diacak dan dibagi menjadi 4 kelompok. Kelompok kontrol tanpa paparan RGEM terbagi menjadi K1 (tanpa pemberian AF) dan K2 (dengan pemberian AF). Sedangkan kelompok perlakuan yang diberi paparan RGEM terbagi menjadi P1 (tanpa pemberian AF) dan P2 (dengan pemberian AF). Hasil yang didapatkan bahwa kelompok P1 memiliki ketebalan lapisan epitel kornea paling tipis dibandingkan kelompok lainnya, namun secara statistik tidak signifikan (uji Kruskal Wallis; p value 0,147). Dari penelitian ini dapat disimpulkan bahwa, AF kemungkinan dapat menurunkan stres oksidatif yang memicu apoptosis pada lapisan epitel kornea mata dengan proses shielding sumber paparan RGEM.
Sifat Fisik dan Mekanik Kayu Bisbul (Diospyros blancoi A.DC.) The Physical and Mechanical Properties of Bisbul Wood (Diospyros blancoi A.DC.) Abdurachman Abdurachman
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 7, No 2 (2009): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (392.826 KB) | DOI: 10.51850/jitkt.v7i2.227

Abstract

Bisbul (Diospyros blancoi A.DC.) signifies as one of the wood species that belong to the streaked Ebony. InIndonesia, this species prevalently grows in Sumatera andWest Java. The branch-free stem of this species when reaching over 25 years can reach about 5 m in height and 30 cm in diameter. It is categorized as dense wood with dark color, which gradually appears like Eben wood. This wood usually finds much uses as handcraft and merchant items.This research aimed to look into characteristic and uses of Bisbul wood through laboratory-scale testing on its physical and mechanical properties. This examined wood species was originated from the community-owned forest situated inBogorregency. The wood samples were taken from three height positions at branch-free Bisbul tree stems (i.e. top, middle, and butt portions) and from three lateral portions (sapwood, heartwood, and pitch), and then prepared to specimens measuring 2 cm by 2 cm in cross-section area. Each of the combination between such height and  lateral-depth positions was replicated three times. The tested physical and mechanical properties covered specific gravity, moisture content, shrinkage, static bending, compressive strength parallel to the grain, shear, tensile parallel to the grain, and impact bending.Results revealed that based on moisture content and specific gravity, Bisbul wood belongs to medium density and floats on the water. Its radial (R) and tangential (T) shrinkages were categorized as medium in the range of 0.92 ~ 2.74% and 2.26 ~ 4.04%, respectively with T/R ratio somewhat less than 2, indicating that the wood was unstable due to moisture changes. Air-dry moisture content at various height and depth positions ranged about 14 ~ 16%, but the density decreased moving from the top, middle, to butt portions. The density at top, middle, and butt portions was consecutively 0.756 ~ 0.806 g/cm3, 0.710 ~ 0.805 g/cm3, and 0.672 ~ 0.716 g/cm3. Based on the examined mechanical properties, Bisbul wood belonged to strength class II ~ I at the butt and middle portion, and to class III ~ II to top portion
The Effect of Steaming and Heat-Compression on the Properties of Jabon Wood for Furniture Materials Efrida Basri; Abdurachman Abdurachman; Wahyu Dwianto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 12, No 2 (2014): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (294.772 KB) | DOI: 10.51850/jitkt.v12i2.72

Abstract

The inferior properties of juvenile jabon wood (Anthocephalus cadamba Miq.) limit its utility. Densification through heat-compression presently conducted is possibly useful to improve its properties. Preceding heat-compression, jabon wood samples were either steamed or non-steamed. Heat-compression temperatures were varied at 170 C, 180 C and 190 C. Compression was carried out until 20% reduction in wood thickness. Physical and mechanical properties and machining properties of the compressed wood samples were determined in accordance with standard procedures of ASTM D143-94 and ASTM D1666-64, respectively. In the present works, both of the ASTM standard referred were slightly modified. X-ray diffractometer (XRD) was used to determine crystallinity degree of wood. The result showed that either steamed or not, densification was successfully increased the properties of juvenile jabon wood and satisfied the requirement of wood for furniture raw materials.Keywords: furniture, heat pressure, steaming, wood properties, young age-jabon
Pemanfaatan Kayu Manis (Cinnamomun burmanii) Berdiameter Kecil untuk Balok I-joist sebagai Bahan Konstruksi (Utilization of Small-Diameter Cinammon Logs for I-joist Beam as Construction Material) Abdurachman Abdurachman; Han Roliadi
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 8, No 2 (2010): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (192.583 KB) | DOI: 10.51850/jitkt.v8i2.221

Abstract

Wood-processing industries currently face the limitation of large-diameter wood logs, due to their scarce stocks from natural forests. Wood from plantation forests can deserve consideration as an alternative raw material for those industries. However, plantation-forest woods are usually of small-diameter sizes and lower qualities compared to those of natural forest woods. One solution to deal with those problems is the conversion of plantation-forest woods into the reconstituted wood products, which can be arranged to various desirable sizes, and more beneficial for construction and other purposes. Hereby, the manufacturing of reconstituted wood products, called I-joist beam was tried from small-diameter plantation forest wood species, i.e. cinnamon wood (Cinnamomum burmanii). The assembling used phenol-resorcinol-formaldehyde adhesive. Mechanical properties of the I-joist beam with vertical-gluing profiles between laminae in the web portion were lower than those of the corresponding small-sized defect-free solid wood, but higher than those of I-joist with horizontal-gluing profiles between laminae in the web as well as the horizontally laminated beam made-up of cinnamon wood-laminae. The angle between wood ray and gluing line (plane) correlated negatively with the strengths of I-joist beam. These results indicated the positive prospect of manufacturing I-joist beam from small-diameter cinnamon wood for construction material.
PENGARUH PENGETAHUAN WAJIB PAJAK, KESADARAN WAJIB PAJAK DAN SANKSI PAJAK TERHADAP KEPATUHAN WAJIB PAJAK DALAM MEMBAYAR PAJAK KENDARAAN BERMOTOR RODA DUA DI KECAMATAN SAMBAS Kartika Sari; U. Sulia Sukmawati; Abdurachman Abdurachman
Jurnal Ekonomi dan Bisnis Vol. 2 No. 10 (2024): Oktober
Publisher : ADISAM PUBLISHER

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

Abstract

One source of government revenue is revenue from the tax sector. Motor Vehicle Tax (PKB) is one of the regional taxes that contributes significantly to financing provincial development. This study aims to determine the effect of taxpayer knowledge, taxpayer awareness and tax sanctions on taxpayer compliance in paying motor vehicle tax at the Sambas Regency SAMSAT office. The number of samples in this study was 40 samples. The sample determination was carried out using the accidental sampling method, which is a technique for determining samples by chance. Data collection was carried out using the questionnaire method.The data analysis technique used was multiple linear regression analysis. The results of this study indicate that the variable of taxpayer awareness has a significant effect on taxpayer compliance, while the variables of taxpayer knowledge and tax sanctions do not have a significant effect on taxpayer compliance. The results of multiple regression show Y = 13,446 + 0.463. The magnitude of the influence of taxpayer knowledge, taxpayer awareness and tax sanctions on taxpayer compliance of two-wheeled motor vehicles is seen from the R-square of 0.194, meaning that variables X1, X2 and X3 influence Y by 19.4% and the remaining 80.6% is influenced by other variables not examined in this study. While for the simultaneous test based on the results in the ANOVA table shows that the significant value is 0.049 so that <0.05. So based on the hypothesis that H4 is accepted. Thus, variables X1, X2 and X3 influence variable Y so that the result is taxpayer knowledge, taxpayer awareness and tax sanctions influence taxpayer compliance of two-wheeled motor vehicles in Sambas Regency.
Co-Authors Dion Krismashogi Dharmawan Efrida Basri Han Roliadi Kartika Sari U. Sulia Sukmawati Viskasari P. Kalanjati Wahyu DWIANTO