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All Journal International Journal of Evaluation and Research in Education (IJERE) Journal of Food and Pharmaceutical Science Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Media Statistika Jurnal Pendidikan Bahasa dan Sastra Indonesia Undiksha Jurnal Telaah dan Riset Akuntansi Diponegoro Journal of Accounting Jurnal Kesehatan Olahraga Avatara El-HARAKAH : Jurnal Budaya Islam Pharmaciana: Jurnal Kefarmasian Media Farmasi : Jurnal Ilmu Farmasi (Journal Of Pharmaceutical Science) Jurnal Dinamika Akuntansi NADWA Jurnal Karya Pendidikan Matematika Journal of Accounting and Investment An-Nuha : Jurnal Kajian Islam, Pendidikan, Budaya Dan Sosial Pharmauho: Jurnal Farmasi, Sains, dan Kesehatan MIQOT: Jurnal Ilmu-ilmu Keislaman Walisongo: Jurnal Penelitian Sosial Keagamaan JPW (Jurnal Politik Walisongo) At-Taqaddum E-Dimas: Jurnal Pengabdian kepada Masyarakat Script Journal: Journal of Linguistic and English Teaching Ijtima'iyya: Journal of Muslim Society Research Kompartemen : Jurnal Ilmiah Akuntansi BBM (Buletin Bisnis dan Manajemen) Jurnal Teknik Jurnal Akuntansi dan Bisnis BALANCE Jurnal Akuntansi dan Bisnis Neo Teknika: Jurnal Ilmiah Teknologi Jurnal Ilmu Administrasi: Media Pengembangan Ilmu dan Praktek Administrasi JURNAL RISET AKUNTANSI TIRTAYASA Jurnal Fokus Manajemen Bisnis Jurnal Senopati : Sustainability, Ergonomics, Optimization, and Application of Industrial Engineering
Abdul Rohman
Jurusan Akuntansi, Fakultas Ekonomi, Universitas Diponegoro Semarang Kampus Tembalang, Semarang 50239
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Other

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Desain Bahan Dasar Campuran Bata Ringan dari Limbah Tambang Emas Pongkor Majid, Abdul; Rohman, Abdul; Isda, Raiyyan Rahmi
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 17 No 1 (2018): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (834.769 KB) | DOI: 10.26874/jt.vol17no1.45

Abstract

Hasil limbah dari tambang emas Pongkor yang berupa tailing diteliti pemanfaatannya sebagai bahan dasar campuran bata ringan. Variasi perbandingan rasio volume semen dengan tailing adalah 1 : 2, 1 : 4, dan 1 : 6 dengan waktu pengerasan 7, 14, 21, dan 28 hari. Parameter pengujian yang dilakukan meliputi densitas (dry density), penyerapan air (water absorption), kuat tekan, kuat tarik belah, dan kuat lentur. Pencampuran tailing sebagai bahan dasar campuran bata ringan menggunakan metode Cellular Lightweight Concrete (CLC) dengan variasi komposisi yang memenuhi syarat ASTM C 969 yaitu densitas < 700 kg/m3, penyerapan air < 25%, dan kuat tekan > 1.4 MPa. Sedangkan untuk kuat tarik belah > 0.25 MPa, yaitu sekitar 10-15% dari kekuatan tekan (Nawy 1998:41) dan kuat lentur > 0,59 MPa (Yothin Ungkoon, 2007). Dari hasil penelitian variasi dengan campuran 1 : 2 (1 semen dan 2 tailing) dengan waktu pengeringan selama 28 hari memiliki hasil pengujian terbaik dan memenuhi semua yang disyaratkan. Pada komposisi tersebut, bata ringan yang dihasilkan memiliki densitas 692 kg/m3, penyerapan air 20,81%, kuat tekan 3,77 MPa, kuat tarik belah 0,48 MPa, dan kuat lentur 0,65 MPa.
PERAN SUSTAINABILITY REPORT SEBAGAI ANTESEDEN TERHADAP MANAJEMEN LABA DAN PENGARUHNYA PADA COST OF EQUITY (Studi Empiris Pada Perusahaan yang Terdaftar di Bursa Efek Indonesia Tahun 2013 - 2016) Hanifah, Risti Hanifah; Rohman, Abdul; Harto, Puji
BBM (Buletin Bisnis & Manajemen) Vol 4, No 2 (2018): Jurnal BBM Bulan Agustus 2018
Publisher : Sekolah Tinggi Ilmu Ekonomi YPPI Rembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47686/bbm.v4i2.246

Abstract

This study aims to examine empirical evidence on the role of sustainability report as an antecedent variable to earnings management, tthrough discretionary accruals and cost of equity that is performed on companies listed on the Exchange Indonesia Securities in 2013-2016.The sample in this study using non-financial companies with a total sample of 78 selected companies with purposive sampling as sampling technique. This study uses Partial Least Squares (PLS) based on variance as a measuring instrument. The data obtained were analyzed by using is WarpPLS 5.0 application.Based on finding shows the importance of sustainability report role seen from each aspect in its influence to earnings management and cost of equity in company. Be concluded that sustainability report consisting of economics and social aspects have a positive effect on earnings management, while the environmental aspects negative affect on earnings management, earnings management have a negative effect on cost of equity and earnings management have a negative effect on cost of equity with the company size as a control variabel.
Analysis of Canola Oil in Virgin Coconut Oil Using FTIR Spectroscopy and Chemometrics Man, Yaakob B. Che; Rohman, abdul
Journal of Food and Pharmaceutical Sciences Vol 1, No 1 (2013): J.Food Pharm.Sci (January-April)
Publisher : Fakultas Farmasi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (371.239 KB) | DOI: 10.14499/jfps

Abstract

Virgin coconut oil is a relative new oil comer in the industry of fats and oils, especially in ropical regions. In this study, we have investigated the possibility to use of Fourier transform infrared (FTIR) spectroscopy in combination with multivariate calibrations of partial least square (PLS) and principle component regression (PCR) as well as discriminant analysis (DA) for quantitative analysis and discrimination of canola oil (Ca-O) in virgin coconut oil (VCO). VCO, Ca-O, and the mixture of both oils was FTIR-spectroscopically scanned at mid infrared region (4,000 – 650 cm-1) using horizontal attenuated total reflectance. Several frequency regions as well as normal and derivative FTIR spectra were compared in order to obtain the best model for quantitative analysis. Finally, FTIR normal spectra at combined frequency regions of 1200-900 and 3027- 2985 cm-1 were selected for quantification of Ca-O due to their capabilities to provide the high correlation between actual and predicted values of CaO in VCO and low error values, either in calibration or validation models. Furthermore, DA was able to discriminate VCO and that adulterated with Ca-O. This result indicated that FTIR spectroscopy was possible to quantify and to discriminate Ca-O in VCO for authentication studies.Keywords: FTIR spectroscopy, canola oil, virgin coconut oil, multivariate calibration, discriminant analysis
Some Physico-chemical Properties of Red Fruit Oil (Pandanus Conoideus Lam) from Hexane and Chloroform Fractions Arumsari, Novita Inar; Riyanto, Sugeng; Rohman, Abdul
Journal of Food and Pharmaceutical Sciences Vol 1, No 2 (2013): J. Food Pharm. Sci (May-August)
Publisher : Fakultas Farmasi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (388.005 KB) | DOI: 10.14499/jfps

Abstract

As  functional  food  oil,  red  fruit  (Pandanus  conoideus  Lam)  oil  has  been  believed  by  local community  to  threat  several  degenerative  diseases  like  cancer.  Red  fruit  oil  (RFO)  has commanded high price value in Indonesian market. Therefore, the objective of the present study was to  investigate several physico-chemical properties of RFO. Some parameters of RFO  obtained  from  hexane  and  chloroform  fractions  have  been  evaluated.  Such parameters include acid value, saponification value, anisidine value, conjugated dienes and trienes as well as p-anisidine value. Besides, absorptivity coefficient, fatty acid composition, and volatile compounds were also determined. Acid value and saponification value of RFO from chloroform fraction were higher than those in RFO from hexane fraction. In addition, RFO  in hexane  fraction has  the higher  iodine and anisidine values  than  that  in chloroform fraction. Hexane  is  the  best  solvent  to  be  used  for  analysis  of  RFO,  as  indicated  by  the highest  absorptivity  coefficient  of RFO  in hexane.  The main  fatty  acid  composed  of RFO was oleic acid  followed with palmitic acid. The main volatile compound present  in RFO of hexane and chloroform fractions was 9-octadecenoic acid accounting of 41.57 % and 65.06 %, respectively.
Differentiation of Bovine and Porcine Gelatins in Soft Candy Based on Amino Acid Profiles and Chemometrics Raraswati, Mita Amalia; Triyana, Kuwat; ., Triwahyudi; Rohman, Abdul
Journal of Food and Pharmaceutical Sciences Vol 2, No 1 (2014): J. Food Pharm. Sci (January-April)
Publisher : Fakultas Farmasi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (497.05 KB) | DOI: 10.14499/jfps

Abstract

Gelatin is widely used in some food products, including soft candy (one of food products preferred by children). Most of the gelatin available in the market derived from pigs. Some religions like Islam and Jews prohibited their followers to consume any food products containing pig derivatives, including porcine gelatin. Therefore, it is necessary to develop some rapid and reliable methods for detection of porcine gelatin in soft candy. The purpose of this study was to differentiate and classification the gelatin sources (porcine or bovine) in soft candy based on amino acid profiles combined with chemometrics of principal component analysis (PCA). Separation and determination of amino acid was conducted by reversed-phase HPLC using a fluorescent detector, after being derivatized  with ortho-phtalaldehyde in 2-mercaptoethanol (OPA/2-MCE). Parameters of peak height percentage of each amino acids from each sample were analyzed by PCA. Based on PC1 and PC2, porcine and bovine gelatins in soft candy could be apparently distinguished.
Analytical Method Validation of Selected Organochlorine Pesticides in Fortified Rice Using Gas Chromatography with Electron Capture Detector Wardani, Mutia Kusuma; Sutriyanto, Bambang; Lukitaningsih, Endang; Rohman, Abdul
Journal of Food and Pharmaceutical Sciences Vol 2, No 1 (2014): J. Food Pharm. Sci (January-April)
Publisher : Fakultas Farmasi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (402.149 KB) | DOI: 10.14499/jfps

Abstract

Gas chromatography with electron capture detector (GC-ECD) has been validated for simultaneous determination of selected organochlorine pesticides namely heptachlor, endosulfan, dieldrin, dan p,p’-dichlorodiphenyltrichloroethane (p,p’-DDT) using aldrin as standard internal. Some parameters for analytical method validation were evaluated, i.e. linearity, precision, sensitivity expressed with limit of detection and limit of quantification, and recovery. GC-ECD was linear for determination of these pesticides with r values ≥ 0.99. The values of LOD obtained were 2.50, 2.97, 1.61, and 2.54 ng/mL for heptachlor, endosulphan, dieldrin, and p,p’-DDT, respectively. Furthermore, the relative standard deviation (RSD) values obtained for the assessment of analytical precision were lower than those required by Horwitz. Finally, the used GC-ECD method was accurate for determination of these organochlorine psticides in fortified rice samples which were indicated by the acceptable recovery percentages.
Application of chemometrics in combination with Fourier Transform Mid Infrared spectroscopy for authentication of avocado oil Lumakso, Fajar A.; Riyanto, Sugeng; SA, Shahrel Ahmad; Rosman, Arieff Salleh; Yusoff, Farahwahida Mohd.; Rohman, Abdul
Journal of Food and Pharmaceutical Sciences Vol 3, No 1 (2015): J. Food Pharm. Sci (January-March)
Publisher : Fakultas Farmasi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (513.385 KB) | DOI: 10.14499/jfps

Abstract

This recent study was carried out to develop a rapid, simple, and accurate analytical method for authenticity determination of avocado oil (AO). Fourier transform-mid infrared (FT-MIR) spectroscopy technique aided with Partial Least Square (PLS) were optimized for that purpose to binary mixtures of AO with grapeseed oil (GO) and sesame oil (SeO). The calibration models were constructed at following selected MIR region with normal spectra treatment at combination 1006-902; 1191-1091; and 1755-1654 cm-1 (GO in binary mixture with AO) and 4000-650 cm-1 for analysis of SeO in binary mixture with AO. The high value of coefficient of determination (R2) of 0.9994 with low root mean square error of calibration (RMSEC) value of 0.86 %v/v was revealed in GO quantification. Meanwhile, R2 of 0.9997 with RMSEC 0.73 %v/v were obtained for analysis of SeO in binary with AO. The given value of root mean square error of pprediction (RMSEP) during model validation were 0.52 %v/v (GO) and 0.53 %v/v (SeO), respectively. The high value of R2 and low value of RMSEC and RMSEP during calibration and validation were associated with the accuracy and precision of the used method. Keywords: avocado oil, FT-MIR spectroscopy, authentication, partial least square.
Development and validation of atomic absorption spectrometry for the determination of zink and mercury analyzer for determination of Mercury in cream cosmetics Rohman, Abdul; Wijayanti, Erni
Journal of Food and Pharmaceutical Sciences Vol 3, No 2 (2015): J. Food Pharm. Sci (April-June)
Publisher : Fakultas Farmasi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (367.361 KB) | DOI: 10.14499/jfps

Abstract

An atomic absorption spectrometry for the quantification of zink (Zn) and mercury analyzer  for the quantification of mercury (Hg) levels in cream cosmetic were developed and validated. The method was validated for linearity and range, precision, accuracy, limit of detection (LOD) and limit of quantification (LOQ). The standard curves were linear over the concentration of 0.1-1.2 µg/mL (Zn) and 0.05-2.0 µg/L (Hg) with coefficient of correlation (r) > 0.99. The detection limits obtained were 2.8614 µg/g sample (Zn) and 0.4749 ng/g sample. The quantification limit  obtained were 9.5281 µg/g sample (Zn) and 1.5827 ng/g sample. The relative standar deviation (RSD) values found to be 8.67 % for its intraday precision and 9.89 % for its interday precision (Zn) and 12.69 % for its intraday precision and 7.17 % for its interday precision (Hg). These RSD values are lower than those required by RSD Horwitz unction. The mean recovery percentage was 94.28 % (for Zn) and 78.65% (for Hg). These developed methods were succesfully used for determination of Zn and Hg in cream cosmetics products. Key words: mercury, zink, atomic absorption spectroscopy, mercury analyzer, cream cosmetic
Physico-chemical Properties, biological activities and authentication of cod liver oil Rohman, Abdul
Journal of Food and Pharmaceutical Sciences Vol 5, No 1 (2017): J. Food Pharm. Sci (January-April)
Publisher : Fakultas Farmasi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (509.563 KB) | DOI: 10.14499/jfps

Abstract

Cod liver oil (CLO), currently, has attracted public awareness and researchers as functional food oils. It is predicted that CLO will experience a great market in the fats and oils industry. CLO has been known to have several biological activities and its price is much higher (10–15 times) than common edible oils, thus CLO is subjected to adulteration with lower priced oils, therefore its authentication is highlighted in this review. This article highlighted some of the reported activities of CLO like the prevention of coronary heart disease. In addition, physico-chemical properties of CLO were also described in this review. Some analytical methods, especially spectroscopy and chromatographic based techniques along with its variation have been used for authentication of CLO from oil adulterants. FTIR spectroscopy along with multivariate calibrations have been reported to be used for authentication of CLO from animal fats and vegetable oils fruitfully. Because of its capability to separate specific components in CLO, chromatographic techniques are suitable for such authentication using specific markers. Keywords: cod liver oil, physico-chemical properties, biological activity, authentication.
Authentication of Wild Boar Meat in Meatball Formulation Using Differential Scanning Calorimetry and Chemometrics Guntarti, Any; Rohman, Abdul; Martono, Sudibyo; Yuswanto, Agustinus
Journal of Food and Pharmaceutical Sciences Vol 5, No 1 (2017): J. Food Pharm. Sci (January-April)
Publisher : Fakultas Farmasi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (560.177 KB) | DOI: 10.14499/jfps

Abstract

Bakso or meatball is one of the Indonesian favorite foods, commonly made from beef. This food is quite popular among Indonesian societies. Due to the high price of beef, unethical producers may adulterate beef with wild boar meat (WBM). In this study, the potential use of differential scanning calorimetry (DSC) combined with multivariate calibration was used to verify adulteration of WBM in meatball formulation. Oil extracted from WBM is characterized by significantly different cooling and heating DSC thermal profiles. The change of characteristic exothermic and endothermic event in oil with increasing crystallization, melting enthalpy and developing both process over a narrower temperature range is investigated. In this research, we developed DSC and multivariate calibration of Partial Least Square (PLS) calibration to analyze WBM in beef meatball. Meanwhile, the chemometrics of Principle Componen Analysis (PCA) is used to classify WBM and beef in the meatball. The validation model using crystalization profiles yield the coefficient of determination (R2) of 0.999 for the correlation between actual value of WBM (x-axis) and DSC predicted value (y-axis) with equation of y= 0.9999 x + 0.0027, root mean square error of cross validation (RMSECV) of 0.380%, and root mean square error of prediction (RMSEP) of 0.203%. PCA is successfully used for classification of WBM in beef meatball. DSC in combination with PLS and PCA can be an alternative technique for analysis of WBM in meatball.Key words: Differential scanning calorimetry, Wild bear meat, Crystallization profile, Melting profile, Partial least square.
Co-Authors -, Sutriyanto Abdul Majid Achmad Fudholi Adhistya Rizky Bestari Agustin, Niyar Candra Agustinus Yuswanto, Agustinus Ahmad Ahmad Ahmad Nurkhin Akmala, Shafira Alan Prahutama Ali Djamhuri Amdi Noviwijaya Anief Rufiyanto Anwar Hartanto, Mastu Any Guntarti Arieff Salleh Rosman Ariyanto Setyawan Budiharto - Cahyaningrum Giyanto, Sinta Eko Andy Purnomo Elfayang Rizky Ayu Puspitasari, Elfayang Rizky Endang Lukitaningsih Ermadiani, Ermadiani Erni Wijayanti, Erni Fajar A. Lumakso, Fajar A. Farahwahida Mohd. Yusoff Farisya Nurhaeni Hadi Pramono Hanifah, Risti Hanifah HARTONO, SOETANTO Hasan Mukhibad Hasanudin, Agus Ismaya Heni Rizqiati I Dewa Ayu Intan Pradnyadari, I Dewa Ayu Intan Indu Prasetya Ning Rahayu Isda, Raiyyan Rahmi Iswahyudi Joko Suprayitno Kuwat Triyana Laela Hayu Nurani Lestari, Tri Margi Kurnianingsih Mastrianto, Agus Mita Amalia Raraswati Mohammad Muslih Mutia Kusuma Wardani Nadhira, Hafifah Hasya Novita Inar Arumsari Okky Widya Arintasari, Okky Widya Pratama, Jodi Setya Prof. Dr. I Wayan Rasna,M.Pd . Puji Harto Putri Nur Anggraini Ratno Agriyanto Ratno Agriyanto Ratno Agriyanto Rendy Cahyo Hadiwijaya Riano Roy Purnaditya, Riano Saifullah, Ahmad Sariyatun Sariyatun Satrio Yudho Widiantoro Shahrel Ahmad SA Sihombing, Melina Yosephine Siti Setianingsih Solikhun Arifin Subagus Wahyuono Sudibyo Martono Sugeng Riyanto Tedjo Sukmono Tiani Wahyu Utami Tito Anantyo Hartono, Tito Triwahyudi . Ubaidillah Ubaidillah Utik Bidayati, Utik Yaakob B. Che Man Yoga Bayu Adi Zubaydah, Wa Ode Sitti