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All Journal Chemica: Jurnal Ilmiah Kimia dan Pendidikan Kimia Jurnal Sains dan Teknologi Alchemy : Journal of Chemistry Jurnal Riset Kimia Elkawnie Jurnal Kimia Mulawarman Al-Kimia Chimica et Natura Acta Saintifik : Jurnal Matematika, Sains, dan Pembelajarannya JKPK (Jurnal Kimia dan Pendidikan Kimia) JURNAL MANAJEMEN AKUNTANSI (JUMSI) Parameter: Journal of Statistics KOMMAS: Jurnal Pengabdian Kepada Masyarakat Journal of Mathematics, Computation and Statistics (JMATHCOS) Tabasa: Jurnal Bahasa, Sastra Indonesia, dan Pengajarannya
Kurnia Ramadani
UIN Alauddin Makassar
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Other

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Sintesis dan Karakterisasi Silika Gel dari Limbah Kaca untuk Menurunkan Kesadahan Air Ramadani, Kurnia
Jurnal Saintifik Vol 4, No 2 (2018): volume 4 nomor 2 juli 2018
Publisher : Fakultas MIPA UNSULBAR

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/saintifik.v4i2.183

Abstract

Limbah gelas adalah sampah anorganik yang tidak dapat diuraikan oleh mikroorganisme. Kandungan SiO2 yang tinggi dalam limbah gelas memiliki potensi sebagai bahan dasar dalam sintesis silika gel. Penelitian ini bertujuan untuk mengetahui karakteristik dan kemampuan silika gel dalam mengurangi kesadahan air sumur. Tahapan dalam penelitian ini dimulai dari ekstraksi silika dari limbah gelas, sintesis silika gel, aktivasi dengan HCl dan pengujian untuk mengurangi kesadahan air sumur. Hasil penelitian menunjukkan bahwa karakteristik silika gel dengan variasi konsentrasi 0,5 M HCl, 0,75 M dan 1 M menggunakan X-Ray Diffraction (XRD) memiliki struktur amorf dengan kandungan SiO2 sebesar 96,1%, 92,1%, dan 89,1%, dan diameter kristal (D) 3,803 nm, 2,653 nm dan 2,204 nm serta hasil uji kesadahan menurun pada sumur I, II dan III sebesar 38,09%, 9,31% dan 12,5%Kata kunci : Silika Gel. Limbah Kaca, kesadahan air
PENGARUH GAYA KEPEMIMPINAN, KESEHATAN KERJA, DISIPLIN KERJA, DAN LINGKUNGAN KERJA TERHADAP TINGKAT SEMANGAT KERJA PADA KARYAWAN PT. MASTER CASH AND KREDIT RANTAU PRAPAT KABUPATEN LABUHANBATU Ramadani, Kurnia
JURNAL MANAJEMEN AKUNTANSI (JUMSI) Vol 1, No 1: JANUARI 2021
Publisher : Universitas Labuhanbatu

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

Abstract

PT Master cash and credit which is located on Jln.SM.Raja Simpang Mangga in carrying out its activities requires a lot of factors and factors encourage a job so that the work can be done well with enthusiasm and goals that will be realized and carried out properly such as This is because the company needs a good leadership style and the work health of every employee and work discipline so that all are properly directed and comply with the rules that exist in the company and the work environment which greatly affects every company and good working morale. The purpose of this study was to determine the effect of leadership style, occupational health, work discipline and work environment on the level of morale of employees of PT. Master cash and credit Rantauprapat using quantitative methods by distributing questionnaire data with a population of 40 people. The analysis technique used is Multiple Linear Regression with a significance level of 5%. The results of the study using Multiple Linear Regression Analysis obtained a regression equation Y = 14.401 + 0.323X1 + 0.217X2 + 0.234X3 + 0.308X4, meaning that there is a positive and significant influence on Leadership Style, Occupational Health, Work Discipline and Work Environment on the Level of Morale. The simultaneous influence of Leadership Style, Occupational Health, Work Discipline and Work Environment on Work Morale Level with a significance value of 0.001 Work Spirit (Y) is influenced by the Variables of Leadership Style, Occupational Health, Work Discipline and Work Environment on Work Spirit Level of 34.4 %. While the remaining 65.6% is influenced by other factors.
PROTEASE ACTIVITY OF THERMOPHILIC BACTERIA FROM LEJJA HOT SPRINGS IN SOPPENG SOUTH SULAWESI Hafsan, Hafsan; Ramadani, Kurnia; Abbas, Abbas
JST (Jurnal Sains dan Teknologi) Vol 10, No 2 (2021)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (344.204 KB) | DOI: 10.23887/jst-undiksha.v10i2.38367

Abstract

This research aimed to observe quantitatively the effect of temperature and pH on protease activities from thermophilic bacteria collected from Lejja—Hot springs.  Spectrophotometry on the casein substrate was used to test the proteolytic activity of the crude protease.  Mixtures of enzyme and casein were incubated at various temperatures and pH for 20 minutes. The absorbance of tyrosine from protein hydrolysis was determined by spectrophotometry on λ 280 nm. Temperature and pH impacted on protease activity were determined at temperature (60; 65; 70; 75; 80; 85 and 90oC) and pH (6.0; 6.5; 7.0; 7.5; 8, 0; 8,5 and 9,0). Results showed that treatment of temperature variations and pH had a significant effect on protease activity. Crude extract of Bacillus licheniformis protease showed that the highest activity at 80oC and pH 7.5 was 0.1303 unit/ml/minute. Bacillus stearoformis showed the highest enzymatic activity of the protease at 85oC, and pH 7.5 was 0.1226 Unit/ ml/minute. In comparison, Bacillus coagulans reached optimum activity at 75oC, and pH 7.5 was 0.2052 Unit/ml/minute. Isolates of Bacillus licheniformis, B. coagulans and B. stearoformis are bacteria that produce thermostable protease enzymes that can be developed as a source of genes and as a producer of the enzyme itself.
Fitoremediasi Logam Kadmium (Cd) dari Asap Rokok Menggunakan Tanaman Puring (Codiaeum Variegatum) Kurniawati L; Syamsidar HS; Kurnia Ramadani
Al-Kimia Vol 4 No 1 (2016): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (249.529 KB) | DOI: 10.24252/al-kimia.v4i1.1457

Abstract

Environmental problems in Indonesia even in the world of growing. One of the factors causing the environmental problems with surging smoking habits in society that cause air pollution. One of the pollutants generated from cigarette smoke is a cadmium (Cd) metal. One of the efforts made in reducing pollutants in the air, especially Cd metals is phytoremediation method using plant croton (Codiaeum variegatum). This study aims to determine the ability of plants to absorb Cd metals croton. The method is performed by directly exposure at 3, 6 and 9 days. Instrument used in this study is an atomic absorption spectrophotometer (AAS). The results showed that the croton leaves absorb Cd metal with a maximum concentration of 1,065 mg/kg on days 9, so that it can be used as Cd metal phytoremediator
Biosorpsi Tanaman Puring (Codiaeum variegatum) Terhadap Emisi Timbal (Pb) Pada Kendaraan Bermotor Nur Amalia P; Syamsidar HS; Kurnia Ramadani
Al-Kimia Vol 2 No 2 (2014): Desember
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (259.48 KB) | DOI: 10.24252/al-kimia.v2i2.1654

Abstract

Enhancement the motorized vehicle number will be potential for air pollution in the big cities. One of the pollutant which is resulted from burning process fuel is timbale (Pb) metal. Alternative effort that is used to decrease the higher timbale (Pb) metal pollutantmaterial is with manner biosorption use puring plant (codiaeumvariegatum).The aim of this research is to know the puring plantability in absorbs Pb metal. The treatment methodis used to sprinkling plant and without sprinkling and than directly exposure to plant with period 3,6 and 9 days. The result of research  that puring leaves ability can absorb Pb concentration metal between (1 until 1,5) ppm or 0,304 mg/Kg at nine days of period exposure, it order can be considered as biosorption agent Pb metal pollution.
Biosorpsi Bogenvil (Bougainvillea spectabilis Wild) Terhadap Emisi Timbal (Pb) Pada Kendaraan Bermotor Andi Nurhikmah; Syamsidar HS; Kurnia Ramadani
Al-Kimia Vol 3 No 2 (2015): December
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (258.46 KB) | DOI: 10.24252/al-kimia.v3i2.1669

Abstract

The motorized vehicle activities could result air pollution. One of the pollutan emitted from fuel process is lead which might be reduced by using Bogenvil plants (Bougainvillea spectabilis Wild). Bogenvil were planted in a 1 x 1,5 meter square sized green house where there is a particular hole to flow exhaust fume of motorized vehicle for an hour in each 3, 6, 9 and 12 day after the first exposure. The result shows that Bogenvil leaves have ability to absorb Pb metal emitted from vehicle in response  to the exposure time. The highest accumulation of Pb in the leave is 0,469 mg/Kg with exposure time of 12 days. For this reason, the Bogenvil plant can be used as bio- accumulator of timbale metal in the air.
Waktu Dan Suhu Optimum Dalam Produksi Asam Oksalat (H2c2o4) Dari Limbah HVS Dengan Metode Peleburan Alkali Nurul Nurul; St. Chadijah; Kurnia Ramadani
Al-Kimia Vol 5 No 1 (2017): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v5i1.2847

Abstract

Waste paper HVS can be used as raw material for the manufacture of oxalic acid containing 63 % cellulose. This study aims to determine the optimum time and temperature in the production of oxalic acid from waste paper with alkali fusion method. Oxalic acid can be made using an alkaline solution ( NaOH 40 % ) with multiple stages such as hydrolysis, filtration, precipitation with CaCl2, acidification with H2SO4 and efflorescence. The time variation used are 60, 70, 80 and 90 minutes. While the temperature variation used is 75oC, 90oC, 105oC and 120oC. From the research that has been done by using waste paper as much as 15 grams of HVS, the optimum time is on the 70th minute and the fusing temperature obtained by the temperature of 105oC. Weight of oxalic acid crystals obtained an average of 1.8043 g and yield of oxalic acid after permanganate test is obtained by 6.8537 %.
Sintesis Membran Silika Kitosan Dari Abu Ampas Tebu (Bagasse) Sjamsiah Sjamsiah; Kurnia Ramadani; Hermawan Hermawan
Al-Kimia Vol 5 No 1 (2017): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v5i1.2857

Abstract

Membrane is a polymer layer that can be used in the process adsorbsi metal ions. Membrane can be synthesized from silica dust bagasse that termodifikasi kitosan. The purpose of this research is to know the impact of the addition of a variety of silicate on the characteristics of the membrane silika-kitosan the bagasse to the adsorpsi metal ions Pb. The content of silica in the bagasse to 73, 80 %. Membrane kitosan-silika be made with different variations of the composition of which is 1 : 1 ; 1 : 1, 5 ; 1 : 2 ; 1 : 2, 5 and 1 : 3 and the ability of the adsorpsi the metal Pb in a row of 41 %, 43, 76 %, 54, 88 %, 38, 36 % and 39, 6 %.. The application of membrane to the process adsorpsi metal ions Pb by membrane said with a ratio of 1 : 2 to concentrate Pb the beginning of the 50 parts per million. The use of membrane to the process readsorpsi to do with how to choose a membrane that has the adsorpsi of the membrane with a ratio of 1:2 be able to absorb metal Pb of 1 ppm. Membrane that has been used can be used with traffic readsorpsi, 2 % in the membrane of every 1 : 2.
Pemanfaatan Limbah Cangkang Kerang Hijau (Perna Viridis) Menjadi Kitin Sebagai Biokoagulan Air Sungai Syamsidar HS; Ramayana Ramayana; Kurnia Ramadani
Al-Kimia Vol 5 No 1 (2017): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v5i1.2859

Abstract

This study aims to determine the optimum weight of chitin that used as biocoagulant of river water. The water sample is taken from Kajenjeng river and the chitin used for research are isolated from green mussels (Perna viridis) shell powder through three steps such as deproteination by NaOH 3%, demineralization by HCl 1,25 N and depigmentation by NaOCl 4%. Then, the obtained chitin are contacted into water with variation of 0,25 gram; 0,5 gram; 0,75 gram and 1 gram in an hour. The result showed that optimum weight of chitin for COD determination, total hardness, calcium and turbidity is 0,75 gram, while optimum weight of chitin for magnesium determination is 0,5 gram.
Sintesis Zeolit dari Abu Layang dengan Metode Hidrotermal dan Uji Adsorptivitas Terhadap Logam Timbal (Pb) Rismang Rismang; Syamsidar HS Syamsidar HS; Kurnia Ramadani
Al-Kimia Vol 5 No 2 (2017): December
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v5i2.3394

Abstract

Synthesis of zeolite from fly ash obtained from Jeneponto Bosowa energypower plant have been conducted by hydrothermal method. This study was conducted to determine the characteristics of a synthetic zeolite fly ash and synthetic zeolite adsortivitas to metallic lead (Pb). Fly ash which is the main source of silica prepared by the process of concentration variations reflux with HCl (2M; 3M; 4M and 5M). Manufacture of sodium silicate solution by dissolving NaOH fly ash into the proportion of 10 ml per 1 gram of fly ash. Synthesis process by adding sodium aluminate into a solution of sodium silicate with a ratio of 1: 1 and then put in an autoclave as a hydrothermal process at a temperature of 120 ° C for 2 hours. Hydrothermal product obtained is characterized by X-Ray Diffraction (XRD) to determine the type and intensity of the zeolite crystals obtained from the synthesis process. XRD analysis results showed the highest intensities are in the process of reflux 5M with type zeolite obtained in the form of zeolite ITQ-34, zeolite (K, Ba) -G, L, sodalite and alumina-silica minerals such as eucryptit and aluminum oxide. The resulting zeolite able to absorb the metals Pb2+ at 99.04%, which is made with a concentration of 20 ppm of 50 mL with a mass of 1 gram of zeolite.
Co-Authors Abbas Abbas, Abbas Agnes Gabriela Putri Winata Aisyah Aisyah Amalyah Febryanti Andi Nurhikmah Arfiani Nur Arthika Putri, Nur Asriani Ilyas David Chandra Dwi Nur Assyifah Rajmah Firnanelty, Firnanelty Gustriza Erda Hafsan Halisa, Halisa Hermawan Hermawan Indra Aulia Irmawati, Ekha Ismail Ismail Kurniawati L Ledya Novamizanti Muhammad Azwar Zulmi Muhammad Raia Pratama Putra Wibowo Musafira Nensilianti Nur Amalia P Nurfadillah Nurul Nurul Patunrengi, Iswadi Ibrahim Putriani Putriani Ramayana Ramayana Ridwan Ridwan Rismang Rismang Rismawati Rismawati Safitriani, Nur Sitti Chadijah Sjamsiah, Sjamsiah St. Chadijah Suryo Adhi Wibowo Susi Diriyanti Novalina Syamsidar HS Syamsidar HS Syamsidar HS Syamsidar HS Syarifah Rabiatul Adawiah Titik Andriani, Titik Ummi Zahra, Ummi