Article Per Year (5 Year)
p-Index From 2020 - 2025
1.556
P-Index
This Author published in this journals
All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences Alchemy : Journal of Chemistry Jurnal Prima Edukasia JPS Unimus Elkawnie Lantanida Journal CIRCUIT: Jurnal Ilmiah Pendidikan Teknik Elektro Al-Kimia Jurnal Ilmiah Didaktika : Media Ilmiah Pendidikan dan Pengajaran Walisongo Journal of Chemistry JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Biomedika Amina Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Measurement In Educational Research Jurnal Natural
Anjar Purba Asmara
Universitas Islam Negeri Ar-Raniry Banda Aceh
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Neuroscience Physics Public Health Social Sciences Other

Published : 24 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 24 Documents
Search

 1   2   3 
Analysis of Vitamin C Level Contained in Mango Gadung (Mangifera indica L) With Varied Retention Time Anjar Purba Asmara
Elkawnie: Journal of Islamic Science and Technology Vol 2, No 1 (2016)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v2i1.658

Abstract

This research is aimed to determine the level of vitamin C in the mango Gadung which stored as long as 0 days; 1 day; 2 days; and 3 days. It is used iodimetric titration. Standard iodine solution used as titrant while starch as the indicator. Determination of raw normality iodine standardization carried out by titration of iodine with sodium thiosulphate solution primer. Normality primary sodium thiosulphate solution (0.0125 N) are determined through standardized sodium thiosulphate with potassium dichromate. Levels of vitamin C in the fruit is determined by linear regression analysis were made based on the graph of the vitamin C levels versus volume of iodine standard solution which used in the titration. The curve gives the equation as following: y = 413.8 x – 1.238. Levels of vitamin C of mango Gadung which has varied retention time as follows: 0.26% (0 days); 0.22% (1 day); 0.20% (2 days); and 0.16% (3 days).
Analisis Hubungan Kuantitatif Struktur Dan Aktivitas Senyawa Turunan Triazolopiperazin Amida Menggunakan Metode Semiempirik AM1 Anjar Purba Asmara; Mudasir Mudasir; Dwi Siswanta
Elkawnie: Journal of Islamic Science and Technology Vol 1, No 2 (2015)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v1i2.525

Abstract

QSAR studies had done on derivatives of triazolopiperazine amide as inhibitors DPP IV enzyme that causes diabetes mellitus type 2. The studies had began by modeling the structures of the derivatives of triazolopiperazine amide and calcutating the descriptors of QSAR by semiempirical AM1 method which available on HyperchemÒprogram. QSAR analysis had done by multilinear regression method analysis which is available on SPSSÒprogram using electronic and molecular parameters. The best QSAR equation model for method of semiempirical AM1:-log IC50 =  152.252 + (18,.295*qC1) + (2.343*qC5) + (2263.448*qC9) +  (1662.252*qC10) – (350.806*qC15) + (639.687*qO25)+ (6.515*EH)n = 18; r2 = 0.712; adjusted r2 = 0.510; Fhit/Ftab = 1.124; PRESS = 0.006 The main side of the compound can be determined through the equation. It can be used to study in preventing the disease of DM2 by inhibiting of enzyme DPP IV.
Penentuan Metode Komputasi Untuk Analisis Hubungan Kuantitatif Struktur dan Aktivitas Senyawa Turunan Triazolopiperazin Amida Anjar Purba Asmara; Mudasir Mudasir; Dwi Siswanta
Elkawnie: Journal of Islamic Science and Technology Vol 1, No 1 (2015)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v1i1.515

Abstract

Penentun metode komputasi untuk analisis hubungan kuantitatif struktur dan aktivitas (HKSA) telah dilakukan pada senyawa turunan triazolopiperazin amida sebagai inhibitor enzim DPP IV yang merupakan penyebab diabetes melitus tipe 2 (DM2). Metode komputasi yang digunakan untuk analisis ini adalah metode semiempirik. Analisis dilakukan dengan pemodelan struktur senyawa turunan triazolopiperazin amida dan perhitungan deskriptor HKSA dilakukan menggunakan program Hyperchem. Parameter yang digunakan adalah pergeseran kimia 13C NMR, panjang ikatan antaratom, sudut ikatan antaratom, dan muatan atom bersih. Hasil perhitungan parameter tersebut dibandingkan dengan data empiris dan hasil perhitungan metode ab initio. Hasil penelitiannya menunjukkan bahwa metode semiempirik yang sesuai untuk analisis HKSA senyawa turunan triazolopiperazin amida adalah AM1 dan PM3.
STEM-integrated encyclopaedia as the enrichment for elementary school students Vera Yuli Erviana; Anjar Purba Asmara
Jurnal Prima Edukasia Vol 7, No 2: July 2019
Publisher : Asosiasi Dosen PGSD dan Dikdas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpe.v7i2.26594

Abstract

The objective of the study is to describe the effectiveness and the fitness of the STEM-Integrated encyclopaedia as the enrichment for the learning materials of Temperature and Heat among Grade V Students in the elementary school degree. Concerning the objective of the study, the nature of the study is Research and Development (RD). In conducting the RD, the ADDIE (Analysis, Design, Development, Implementation and Evaluation) model had been adopted. In overall, the Analysis was directed toward the problems that had occurred among the students, the Design was related to the media that should be presented to the students, the Development referred to the model of the media that had been in accordance to the needs of the students, the Implemented was related to the Development that had been performed and the Evaluation was directed toward the media that had been developed. In gathering the data, several techniques had been applied namely interview, test administration and questionnaire distribution. Then, in analysing the data both of the qualitative and the quantitative approach had been adopted. Furthermore, in testing the hypothesis, the paired t-test had been administrated to identify the results of the effectiveness of the study. Based on the results of the assessment by the media validator, the material validator and the learning validator, it might be concluded that the STEM-integrated encyclopaedia has been fit for the implementation of the learning process among the Grade V students within the elementary school degree. In the same time, the results of the test show that the effectiveness of the STEM-integrated encyclopaedia has been significant since in the conduct of the hypothesis test (t-test) using the paired t-test it is found that the t-count (10.325) the t-table (2.048). Besides, it is also found that the significance (p-value) has been 0.000, which is lower than the α 5.00% (0.0000 0.050) from the results of the comparison between the pre-test and the post-test. Therefore, the use of the STEM-integrated encyclopaedia has been fit for implementation in the elementary school degree.
PENILAIAN KUALITAS MEDIA AUDIO VISUAL TENTANG KARAKTERISTIK LARUTAN ASAM BASA UNTUK SISWA SMA/MA Nokman Riyanto; Anjar Purba Asmara
JURNAL PENDIDIKAN SAINS UNIVERSITAS MUHAMMADIYAH SEMARANG Vol 6, No 1 (2018): JURNAL PENDIDIKAN SAINS UNIVERSITAS MUHAMMADIYAH SEMARANG
Publisher : Pendidikan Kimia Unimus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/jps.6.1.2018.73-85

Abstract

Penelitian ini merupakan penelitian research and development yang bertujuan untuk mengembangkan media audio visual tentang karakteristik larutan asam basa dan menentukan kualitas media tersebut. Penelitian ini menggunakan model prosedural dari Allesi & Trollip dan analisis deskriptif kuantitatif melalui penilaian lima orang guru kimia sebagai reviewer menggunakan rubrik. Media yang dihasilkan mengangkat dua topik, yaitu penentuan sifat larutan dan penentuan pH suatu larutan, dan mendapatkan penilaian dengan kualitas baik. skor rerata sebesar 130,80 dan persentase keidealan sebesar 72,67 %.  
KAJIAN INTEGRASI NILAI-NILAI KARAKTER ISLAMI DENGAN KIMIA DALAM MATERI KIMIA KARBON Anjar Purba Asmara
JURNAL PENDIDIKAN SAINS UNIVERSITAS MUHAMMADIYAH SEMARANG Vol 4, No 2 (2016): JURNAL PENDIDIKAN SAINS UNIVERSITAS MUHAMMADIYAH SEMARANG
Publisher : Pendidikan Kimia Unimus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/jps.4.2.2016.1-11

Abstract

Kajian tentang nilai-nilai karakter Islami yang terkandung di dalam kimia karbon telah dilakukan melalui penggalian muatan-muatan filosofi dalam materi kekhasan atom karbon, ikatan dalam senyawa karbon, klasifikasi, dan reaksi dalam senyawa karbon. Kajian ini mengintegrasikan nilai-nilai karakter Islami untuk menguatkan dan dikuatkan oleh gagasan utama yang diangkat dalam kimia karbon. Metode yang digunakan adalah deskriptif kualitatif yang menggunakan teknik analisis isi, analisis dengan pendekatan filosofis, analisis dengan model triadik, dan analisis dengan pola konfirmasi. Hasil yang diperoleh dari kajian ini adalah:(1) berzikir kepada Allah SWT dalam materi kekhasan atom karbon dengan 4 elektron valensi, (2) menjaga silaturahmi dari sifat atom karbon yang dapat berkatenasi, (3) senang bersedekah dan menolong dari ikatan kimia karbon, (4) bijak dan adil saat menjumpai perbedaan dari materi klasifikasi senyawa karbon, (5) memperbaiki diri dan meninggalkan hal-hal yang tidak bermanfaat dari reaksi substitusi, (6) ikhlas dalam membantu orang lain dari reaksi adisi, (7) sabar dan berserah diri pada Allah SWT dari reaksi eliminasi.
QSAR Modeling of Compounds Derived from 1,2,3-Triazolopiperidine as DPP-4 Enzyme Inhibitors Using Semiempirical AM1 Anjar Purba Asmara; Reni Silvia Nasution; Rosi Minarty
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 1 (2020): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (880.254 KB) | DOI: 10.20961/jkpk.v5i1.28358

Abstract

This study aims to model the derived compounds of 1,2,3-triazolopiperidine using sem­iempirical method AM1 and determine the further derivation with the better IC50 values against DPP-4 enzyme theoretically. This research employed ChemDraw Pro 12 software for for 2D struc­tural drawing, Hyperchem 8.0 for 3D modelling, and MLR statistical analysis for modeling QSAR equations. The semiempirical method was likely to be the appropriate platform to apply because the correlation coefficient of H1 NMR chemical shift between theoretical and actual value is rela­tively close, 0.8891. The multilinear regression analysis produced 4 equation models where the best one is equation 4 as detailed below:” IC50   = 875,5116 + (-7400,27*qH35) + (-0,00133* Eat.is) + (-3230,72* qN23) + (3,30277* µ)” n = 25; r2 = 0,594; Adjusted r2= 0,486; PRESS = 1,2× 104. Finally, the theoretically promising substituent was -CN possessing IC50 value = 1.61 nM. 
ANALISIS HKSA SENYAWA TURUNAN 4-FENOKSIPIRIMIDIN-5KARBOKSIAMIDA SEBAGAI ANTIDIABETIK MENGGUNAKAN METODE AM1 Anjar Purba Asmara
Jurnal Sains dan Terapan Kimia Vol 13, No 2 (2019)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (619.991 KB) | DOI: 10.20527/jstk.v13i2.6432

Abstract

Penelitian bertujuan untuk memodelkan senyawa turunan 4-fenoksipirimidin-5-karboksamida dan menentukan persamaan HKSA yang dihasilkan. Penelitian ini menggunakan metode semiempirik AM1 karena tingkat ketelitiannya cukup tinggi dan waktu perhitungannya relatif cepat. Metode statistika yang digunakan untuk pemilihan deskriptor yang berhubungan dengan aktivitas biologis senyawanya adalah analisis multilinear regression (MLR) karena jumlah deskriptornya relatif banyak. Pemodelan dalam penelitian ini menghasilkan satu model persamaan dengan rincian sebagai berikut:-log EC50 = -47.95 + (71.322*qCl7) + (15.357*qC10) + (-169.512*qC11) + (1.955*qC23) + (0.493*EH) + (-0.612*log P) + (-0.017*α) + (146.598*grad) + (0.018* ΔHf)n = 14; r = 1.000; r2 = 1.000; adjusted r2 = 1.000; PRESS = 8.706
Evaluasi program pembelajaran kimia SMA/MA berbasis pondok pesantren Ummul Karimah; Edi Istiyono; Anjar Purba Asmara; Ilham Nasrullah
Measurement In Educational Research Vol 2, No 2 (2022)
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/meter.v2i2.189

Abstract

Penelitian ini bertujuan untuk mengetahui kualitas program pembelajaran kimia SMA/MA Berbasis Pondok Pesantren di Kota Metro, Lampung yang terdiri dari perencanaan, pelaksanaan, dan penilaian. Model evaluasi yang digunakan adalah model evaluasi countenance stake dengan tiga tahap evaluasi, yaitu antecedent, transaction, dan outcomes. Subjek penelitian terdiri dari 3 guru kimia dan 150 peserta didik kelas XI semester II tahun pelajaran 2019/2020. Pengumpulan data dilakukan dengan cara dokumentasi, observasi, dan angket. Data dianalisis dengan kuantitatif deskriptif menggunakan rata-rata skor ideal dan dikategorikan berdasarkan tabel kriteria distribusi normal. Hasil penelitian menunjukkan bahwa kualitas perencanaan pembelajaran kimia berdasarkan kelengkapan komponen RPP berkategori sangat baik dan kesesuaian dokumen RPP berategori baik. Kualitas pelaksanaan pembelajaran kimia dan penilaian berdasarkan angket berkategori baik dan pelaksanaan pembelajaran berdasarkan observasi berkategori kurang baik. Kualitas penilaian hasil belajar berdasarkan telaah kesesuaian dokumen RPP berkategori kurang baik dan hasil belajar peserta didik yang sebagian besar tidak tuntas berdasarkan penilaian tengah semester. Evaluation of SMA/MA chemistry learning program based on Islamic boarding schools Abstract: This study aims to determine the quality of the Islamic Boarding School-based SMA/MA chemistry learning program in Metro City, Lampung, which consists of planning, implementation, and assessment. The evaluation model used is a stake countenance evaluation model with three stages: antecedent, transaction, and outcomes. The research subjects consisted of 3 chemistry teachers and 150 students of class XI semester II of the 2019/2020 school year. Data collection was done by means of documentation, observation, and questionnaires. Data were analyzed by quantitative descriptive using the average ideal score and categorized based on the table of normal distribution criteria. The results showed that the quality of chemistry learning planning based on the completeness of the lesson plan components was categorized as very good, and the suitability of the lesson plan documents was categorized as good. The quality of the implementation of chemistry learning and assessment based on a questionnaire was categorized as good, and the implementation of learning based on observations was categorized as poor. The quality of the assessment of learning outcomes based on the study of the appropriateness of the RPP document was categorized as poor, and the learning outcomes of students, most of which were incomplete, were based on the mid-semester assessment.
STUDI PERSPEKTIF SENSORIK DAN KADAR KAFEIN KOPI KHOP BANDA ACEH Nurhayati; Anjar Purba Asmara; Sabarni
AMINA Vol 3 No 3 (2021): December 2021
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Ar-Raniry

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

Abstract

Kajian kandungan kafein yang berkaitan dengan cita rasa kopi unik dari Aceh, kopi Khop, masih terbatas. Studi ini bertujuan untuk menentukan hubungan antara kadar kafein dalam bubuk kopi Khop dan karakteristik sensorik dengan analisis regresi linear. Bubuk kopi Khop dipisahkan berdasarkan empat kategori: halus (fine, F), sedang (medium, M), kasar (coarse, C), dan original (O). Keempat jenis bubuk kopi tersebut diseduh dengan air panas (90 oC) lalu diuji karakteristik sensoriknya menggunakan uji organoleptik meliputi rasa asam dan pahit, aroma, warna, dan residu ampas. Sampel kopi tersebut juga diukur kadar kafeinnya menggunakan spektrometer UV-vis dan harga pH-nya. Analisis dengan regresi linear sederhana menunjukkan hubungan linear negatif antara kadar kafein bubuk F, M, dan C dengan skor deskriptor sensorik kopi Khop. Berdasarkan hasil uji tersebut, kadar kafein bukan merupakan faktor tunggal yang menentukan hasil penilaian karakter sensorik bubuk kopi Khop yang ditunjukkan dengan linearitas negatif antara kadar kafein dan skor aroma kopi.
Co-Authors Agus Dwi Ananto, Agus Dwi Siswanta Edi Istiyono Elsa Citra Lestari Endaruji Sedyadi Fitra Saputra Hanik Khuriana Amungkasi Hernawan Hernawan Ilham Nasrullah Ilma Fistannisa Zette Mahrizal Mahrizal Malahayati Malahayati Mudasir Mudasir Mudasir Mudasir Muhammad Ridwan Harahap Nizar Mauliza Nokman Riyanto Nokman Riyanto Nurhayati Nurhayati Nuzlia, Cut Rahmah, Maulidia Reni Silvia Nasution Rosi Minarty Sabarni Sabarni Ummul Karimah Vera Yuli Erviana Winda Afriani Yeniza