Hernawan Hernawan
Technical Implementation Unit for Development of Chemical Engineering Processes, Indonesian Institute of Sciences, Jl. Yogya-Wonosari km 32, Gading, Playen, Gunungkidul, Yogyakarta 55861

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SYNTHESIS OF 2-METHOXY-4,6-DI(PROP-1-ENYL)PHENOL FROM EUGENOL AND ITS ACTIVITY AS AN ANTIOXIDANT Hernawan, Hernawan; Purwono, Bambang; Wahyuningsih, Tutik Dwi
Indonesian Journal of Chemistry Vol 12, No 2 (2012)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (325.695 KB) | DOI: 10.22146/ijc.21360

Abstract

Synthesis and antioxidant activity of 2-methoxy-4,6-di(prop-1-enyl) phenol from eugenol have been investigated. Synthesis was conducted through three stages of reaction. The first step was CTAB micellar catalytic O-allylation reaction at room temperature, to give 4-allyl-1-(allyloxy)-2-methoxybenzene (2). Compound (2) was subsequently heated for Claisen rearrangement and produced 2,4-diallyl-6- methoxyphenol (3). The final steps was isomerization of compound (3) in alkaline conditions in ethylene glycol, to yield 2-methoxy-4,6-di(prop-1-enyl) phenol (4). Antioxidant activity test was conducted by TBARS and DPPH methods. TBARS test showed that the compound (4) at a concentration of 50 ?M could inhibit the oxidation of linoleic acid shown by the increasing of time lag phase (96 ± 2.94 min), reducing the rate of propagation (± 54.54%) and reducing of malonal dialdehyde (MDA) formation (68.04 ± 0.84%). The DPPH test revealed that compound (4) indicated DPPH free radical scavenging activity with IC50 107.66 ?M and comparable with IC50 for BHT 107.37 ?M.
PENTINGNYA PENCANTUMAN LABEL HALAL DALAM KEMASAN PRODUK PANGAN SEBAGAI BENTUK PERLINDUNGAN HUKUM BAGI KONSUMEN MUSLIM hernawan, Hernawan
Journal of Law ( Jurnal Ilmu Hukum ) Vol 1, No 2 (2013)
Publisher : Universitas 17 Agustus 1945 Samarinda

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ABSTRAKSI                          Pentingnya Pencantuman Label Halal Dalam Kemasan Produk Pangan Sebagai Bentuk Perlindungan Hukum Bagi Konsumen Muslim. Di bawah bimbingan Dr. H. Syahrin Naihasy, S.H, M.A, M.Phil. Skripsi Program Sarjana Strata Satu (S-1) pada Program Studi Ilmu Hukum, Universitas 17 Agustus 1945 Samarinda, 2013.                    Penelitian ini bertujuan dalam rangka membantu Majelis Ulama Indonesia dalam menentukan kebijaksanaan, merumuskan ketentuan-ketentuan, rekomendasi bimbingan yang menyangkut pangan, obat-obatan dan kosmetika sesuai dengan ajaran Islam serta agar dapat memberikan rasa aman  pada umat tentang produk yang dikonsumsi, maka pada tanggal 6 Januari 1989, bertepatan dengan 26 Januari Awal 1409 H bersadarkan Surat Keputusan Nomor : 18/MUI/1989 Majelis Ulama Indonesia membentuk suatu lembaga yaitu, LPPOM-MUI (Lembaga Pengkajian Pangan obat-obatan, dan Kosmetika Majelis Ulama Indonesia). Dalam LPPOM-MUI, didudukkan sejumlah tenaga ahli pangan, kimia, fiqh Islam dan lain-lain yang telah menyelesaikan jenjang pendidikan S-1, S-2 serta S-3 dan lama berkiprah di bidang keahliannya masing-masing. Tanpa hal tersebut peran LPPOM – MUI dalam perlindungan konsumen muslim tidak tercapai dan akan terjadi masalah. Oleh karena itu peran LPPOM – MUI ini sangat diperlukan terutama dalam memberikan rekomendasi dan bimbingan yang menyangkut pangan, obat-obatan dan kosmetika sesuai dengan ajaran Islam sehingga seluruh konsumen terutama konsumen muslim dapat merasa aman dengan produk yang dikonsumsinya.Menghindari hal-hal yang tidak diinginkan, maka setiap konsumen perlu berhati-hati sebelum membeli suatu produk pangan yang akan dikonsumsinya. Salah satu upaya yang pertama kali dapat dilakukan oleh konsumen adalah dengan melihat kemasan dan labelnya. Label pada kemasan produk pangan bukanlah sekedar hiasan. Dari label inilah, konsumen mengetahui banyak hal tentang produk yang akan dikonsumsinya. Pemahaman tentang cara membaca label akan bermanfaat bagi konsumen sehingga tidak terjebak pada hal-hal yang menyesatkan. Pada umumnya, konsumen tidak selalu dapat memanfaatkan informasi yang ada pada label. Salah satu permasalahannya adalah  kurang memahami maksud yang ada dalam label tersebut.
ANALISIS PENELUSURAN TRANSACTION FRAUD DALAM PEREKAYASAAN PELAPORAN KEUANGAN Hernawan, Hernawan
Jurnal Ekonomi Bisnis dan Kewirausahaan (JEBIK) Vol 1, No 2 (2010): Jurnal Ekonomi, Bisnis dan Kewirausahaan
Publisher : Fakultas Ekonomi dan Bisnis, UNTAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (329.235 KB) | DOI: 10.26418/jebik.v1i2.695

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Abstract Globalization has resulted in remarkable changes in all aspects of life, including in managing firms financial transaction in corporate sector. Financial reporting reengineering in large private company frequently brings about financial fraudaulous practices. The objective of this article is to shed light on fraudaulous transaction in financial reporting reengineering, which was commonly observed in private companies. Reengineered financial reporting containing transaction fraud has widely been practiced in private companies in form of increasing fantastic profits, hiding out debts, reporting ficticious incomes, cutting taxes and increasing ficticious cash flows, while it is most probable these companies have been gone bankcruptcy. Financial reporting engineering manipulation is aimed at making up with favourable financial performance of the firm in order that firms stocks remains attractive for investors. Keywords: fradaulous transaction, financial reporting engineering, private companies
INFORMASI AKUNTANSI MANAJEMEN DAN KEEFEKTIFAN PENGAMBILAN KEPUTUSAN Hernawan, Hernawan
JURNAL ILMU MANAJEMEN DAN BISNIS Vol 4, No 1 (2013): Jurnal Ilmu Manajemen dan Bisnis. Maret 2013
Publisher : Universitas Pendidikan Indonesia

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Penelitian ini adalah untuk mengungkapkan data yang empiris tentang faktor yang mempengaruhi dominasi informasi akuntansi manajemen yang terdiri dari: informasi akuntansi penuh, informasi akuntansi diferensial dan akuntansi pertanggungjawaban untuk menyusun laporan perencanaan, laporan kontrol dan laporan informasi dan efektivitas pengambilan keputusan. Metode penelitian ini adalah Metode Survey Explanatory dan melakukan pengumpulan data dengan kuesioner kepada 138 perusahaan yang dikategorikan sebagai industri berskala besar diproduksi di Kalimantan Barat data. Data dianalisis dengan analisis jalur. Hasil penelitian ini adalah: (1) informasi lengkap akuntansi, informasi akuntansi diferensial, informasi akuntansi pertanggungjawaban: (a) faktor yang paling dominan yang mempengaruhi laporan perencanaan informasi akuntansi penuh, (b) faktor yang paling dominan yang mempengaruhi untuk mengendalikan laporan adalah informasi akuntansi pertanggungjawaban, (c) faktor yang paling dominan yang mempengaruhi laporan informasi adalah informasi akuntansi diferensial, (2) faktor yang paling dominan yang berpengaruh terhadap pengambilan keputusan efektivitas informasi akuntansi penuh, (3) faktor yang paling dominan perencanaan laporan, laporan mengendalikan dan melaporkan informasi yang berpengaruh terhadap pengambilan keputusan efektivitas laporan informasi.
PHYSICAL ACTIVITY DEVELOPMENT MODEL USING TRADITIONAL BALINESE GAME IN JUNIOR HIGH SCHOOL Kusuma, Hendry Wijaya; Asmawi, Moch.; Hernawan, Hernawan; Dlis, Firmansyah; Kanca, I Nyoman
PendIPA Journal of Science Education Vol 4, No 1 (2020): FEBRUARY
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (225.797 KB) | DOI: 10.33369/pendipa.4.1.40-46

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This study aims to develop learning of physical activity using traditional Ballinese in junior high schools, Buleleng Regency. Students can learn physical materials without feeling bored and tired. This study refer to research and development model by Borg and Gall. From the research and development, as well as the proposed procedures, the resulting product is a physical fitness learning model based on traditional Balinese games in junior high schools that consist of 30 traditional Balinese games. Product development begun with expert studies, field tests in small and large test groups and. Effectiveness tests. From the large-group test results, the model developed can be applied by students properly. In the effectiveness test, the mean of the control group was 364.08, while the mean of the experimental group was 350.00 that show the difference between the results of the experimental group and the control group. It can be concluded that there is a significant difference between the experimental group given the treatment and the control group. Product development can be ,improved significantly on the physical activity and attitude or affective student. Based on the results of the research, the product model of learning physical fitness activities based on traditional Balinese games can be recommended and can be effective as a learning model of physical fitness activities in junior high schools.
MODEL WRITING WORKSHOP DALAM PENULISAN PROPOSAL SKRIPSI MAHASISWA DEPARTEMEN PENDIDIKAN BAHASA DAERAH FPBS UPI Hernawan, Hernawan; Widyastuti, Temmy; Nugraha, Haris Santosa
LOKABASA Vol 8, No 2 (2017): Vol. 8, No. 2, Oktober 2017
Publisher : UPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jlb.v8i2.15591

Abstract

Penelitian ini dilatarbelakangi oleh kemampuan menulis proposal skripsi mahasiswa Departemen Pendidikan Bahasa Daerah FPBS yang masih rendah, karena belum ada model pembelajaran menulis proposal skripsi yang tepat. Oleh karena itu, perlu adanya model pembelajaran menulis proposal skripsi yang efektif dan efisien. Tujuan penelitian ini adalah untuk mendeskripsikan kemampuan menulis proposal penelitian (skripsi)  mahasiswa sebelum dan setelah menggunakan model writing worshop. Metode yang digunakan dalam penelitian adalah kuasi eksperimen dengan sumber data 55 mahasiswa. Berdasarkan hasil penelitian rata-rata pretest diketahui 66,00 dan rata-rata posttest sebesar 83,18, dengan t hitung adalah 27,755. Maka, dapat disimpulkan adanya perbedaan yang signifikan antara kemampuan mahasiswa dalam menulis proposal skripsi sebelum dan setelah menggunakan model writing workshop. Jadi, dapat disimpulkan bahwa model Wiritng Workshop  dapat meningkatkan kemampuan menulis proposal skripsi mahasiswa Departemen Pendidikan Bahasa Daerah FPBS Tahun Akademik 2017-2018. Kata Kunci: writing workshop, proposal skripsi.  Abstract This research is motivated by the ability to write thesis proposal of the Department ofSundanese Language Education Department of FPBS which is still insufficient, because there is lack of learning model of appropriate writing  thesis proposal. Therefore, it is necessary to have a learning model of writing an effective and efficient thesis proposal. The purpose of this study is to describe students’ ability to write research thesis proposals before and after utilizing writing model workshop. The method used in this research is quasi experiment involving 55 students as data source. Based on the result of research, it showed that pretest score  average is 66,00 and post test score average equal to 83,18, with  27,755 t count. Thus, it can be assumed that there is a significant difference between the ability of students in writing thesis proposal before and after utilizing  writing workshop model. Thus, it can be concluded that writing workshop model can improve students ability to write thesis proposal in the Department of Sundanese Language Education  of FPBS in 2017-2018 academic year. Keywords: writing workshop, thesis proposal.
KATA SERAPAN BAHASA SUNDA (Pendekatan Étimologi, Morfologi, dan Grafologi) Hernawan, Hernawan; Widyastuti, Temmy; Nugraha, Haris Santosa
LOKABASA Vol 8, No 2 (2017): Vol. 8, No. 2, Oktober 2017
Publisher : UPI

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Abstract

Penelitian ini dilatarbelakangi oleh kemampuan menulis proposal skripsi mahasiswa Departemen Pendidikan Bahasa Daerah FPBS yang masih rendah, karena belum ada model pembelajaran menulis proposal skripsi yang tepat. Oleh karena itu, perlu adanya model pembelajaran menulis proposal skripsi yang efektif dan efisien. Tujuan penelitian ini adalah untuk mendeskripsikan kemampuan menulis proposal penelitian (skripsi)  mahasiswa sebelum dan setelah menggunakan model writing worshop. Metode yang digunakan dalam penelitian adalah kuasi eksperimen dengan sumber data 55 mahasiswa. Berdasarkan hasil penelitian rata-rata pretest diketahui 66,00 dan rata-rata posttest sebesar 83,18, dengan t hitung adalah 27,755. Maka, dapat disimpulkan adanya perbedaan yang signifikan antara kemampuan mahasiswa dalam menulis proposal skripsi sebelum dan setelah menggunakan model writing workshop. Jadi, dapat disimpulkan bahwa model Wiritng Workshop  dapat meningkatkan kemampuan menulis proposal skripsi mahasiswa Departemen Pendidikan Bahasa Daerah FPBS Tahun Akademik 2017-2018. AbstractThis research is motivated by the ability to write thesis proposal of the Department ofSundanese Language Education Department of FPBS which is still insufficient, because there is lack of learning model of appropriate writing  thesis proposal. Therefore, it is necessary to have a learning model of writing an effective and efficient thesis proposal. The purpose of this study is to describe students’ ability to write research thesis proposals before and after utilizing writing model workshop. The method used in this research is quasi experiment involving 55 students as data source. Based on the result of research, it showed that pretest score  average is 66,00 and post test score average equal to 83,18, with  27,755 t count. Thus, it can be assumed that there is a significant difference between the ability of students in writing thesis proposal before and after utilizing  writing workshop model. Thus, it can be concluded that writing workshop model can improve students ability to write thesis proposal in the Department of Sundanese Language Education  of FPBS in 2017-2018 academic year.
INHIBITION OF HUMAN LOW-DENSITY LIPOPROTEINS OXIDATION BY HIBISCUS RADIATUS CUV. CALYCES EXTRACT Hernawan, Hernawan
Indonesian Journal of Chemistry Vol 8, No 1 (2008)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (130.88 KB) | DOI: 10.22146/ijc.21655

Abstract

Hibiscus radiatus Cuv calyces extracts rich in polyphenols was screened for their potential to inhibit oxidation of human low-density lipoproteins-cholesterol (LDL-C) in vitro. The inhibition of LDL-C oxidation (antioxidant activity) was determined by measuring the formation of conjugated dienes and thiobarbituric acid reagent substances (TBARS). LDL-C oxidation was carried out in the presence of H. radiatus Cuv calyces extract (20 and 50 ?M). CuSO4 (10 ?M) was used as the oxidation initiator and  butylated hydroxytoluene (BHT) at 50 ?M was used as standard antioxidant. The protective effect of H. radiatus Cuv. calyces extract toward human low-density lipoproteins, complex lipid system was  demonstrated by significant increase lag time (> 103 min), diminished of the propagation rate (44 %), and diminution of conjugated dienes formation 59.42 % (50 ?M) compared to control.
FORMULATION AND IN VITRO STUDY OF PROPRANOLOL HYDROCHLORIDE CONTROLLED RELEASE FROM CARBOXYMETHYL CHITOSAN-BASED MATRIX TABLETS Hernawan, Hernawan; Nurhayati, Septi; Nisa, Khoirun; Indrianingsih, A.W.; Darsih, Cici; Kismurtono, Muhammad
Indonesian Journal of Chemistry Vol 13, No 3 (2013)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (391.184 KB) | DOI: 10.22146/ijc.21283

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Formulation and in vitro study of propranolol hydrochloride controlled release from carboxymethyl chitosan-based matrix tablets have been conducted. Formulations with various concentrations of carboxymethyl chitosan 2% (F1), 4% (F2), 6% (F3) were done by wet granulation method. Compatibility test was conducted by XRD and FTIR spectroscopy to determine interaction between propranolol hydrochloride and polymer excipients. Dissolution profiles was obtained through in vitro tests release using simulated gastric fluid (without enzymes, pH 1.2) for the first 2 h and followed by simulated intestinal fluid (phosphate buffer solution without enzyme, pH 7.2) for 2 h remaining. The dissolution profile of each formulation was fitted with five kinetics modeling of drug release (zero order, first order, Higuchi, Peppas-Korsmeyer, and Hixson-Crowell). The compatibility test results showed that formulation caused physical interactions between propranolol hydrochloride and polymer excipient but doesnt make crystallinity nature of propranolol hydrochloride disturbed even after formulation. Dissolution profiles of each formulation showed that controlled release of propranolol hydrochloride from the tablet followed Peppas-Korsmeyer model. It is concluded that carboxymethyl chitosan in appropriate proportions is suitable for formulating propranolol hydrochloride controlled release tablets which exhibit Peppas-Korsmeyer release kinetics.
ISOLATION AND CHARACTERIZATION OF CHITIN AND CHITOSAN PREPARED UNDER VARIOUS PROCESSING TIMES Poeloengasih, Crescentiana Dewi; Hernawan, Hernawan; Angwar, M.
Indonesian Journal of Chemistry Vol 8, No 2 (2008)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (311.967 KB) | DOI: 10.22146/ijc.21635

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Generally production of chitosan from crustacean shells consists of 4 steps, i.e. deproteinization, demineralization, decolorization and deacetylation. Simplification of chitosan production by elimination of deproteinization and/or demineralization, or reducing of reaction time would give many advantages, e.g. reduction of processing time and cost production due to reduction of chemical and power usage. The objectives of this research were to prepare chitosan under various processing times and to characterize the obtained chitin and chitosan. Chitin was prepared under various deproteinization times (0, 15, 30 min at 90 ºC using NaOH 2N) and demineralization times (0, 15, 30 min at ambient temperature using HCl 2N). Chitin was then bleached using aceton/etanol (1:1) for an hour. Deacetylation was achieved by treatment of chitin under condition at 120 ºC for 5 hr using NaOH 50%. Ash and nitrogen content, and degree of deacetylation of chitosan were evaluated. Demineralization and/or deproteinization times influenced the quality of chitin. Chitin and chitosan prepared without demineralization had white and chalky appearance, whereas the other chitosan were off-white in color. Ash and nitrogen contents of the chitosan products were 0.18 - 32.40% and 3.56 - 7.59%, respectively. Chitosan prepared under various processing times, except chitosan without demineralization treatment, had degree of deacetylation ≥ 70%.   Keywords: chitosan, deproteinization, demineralization, deacetylation, processing times