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  Subjects -> CHEMISTRY (Total: 885 journals)
    - ANALYTICAL CHEMISTRY (55 journals)
    - CHEMISTRY (619 journals)
    - CRYSTALLOGRAPHY (21 journals)
    - ELECTROCHEMISTRY (28 journals)
    - INORGANIC CHEMISTRY (43 journals)
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    - PHYSICAL CHEMISTRY (71 journals)

CHEMISTRY (619 journals)                  1 2 3 4 | Last

Showing 1 - 200 of 735 Journals sorted alphabetically
2D Materials     Hybrid Journal   (Followers: 14)
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 27)
ACS Catalysis     Hybrid Journal   (Followers: 44)
ACS Chemical Neuroscience     Hybrid Journal   (Followers: 22)
ACS Combinatorial Science     Hybrid Journal   (Followers: 23)
ACS Macro Letters     Hybrid Journal   (Followers: 26)
ACS Medicinal Chemistry Letters     Hybrid Journal   (Followers: 41)
ACS Nano     Hybrid Journal   (Followers: 295)
ACS Photonics     Hybrid Journal   (Followers: 14)
ACS Symposium Series     Full-text available via subscription  
ACS Synthetic Biology     Hybrid Journal   (Followers: 25)
Acta Chemica Iasi     Open Access   (Followers: 5)
Acta Chimica Slovaca     Open Access   (Followers: 2)
Acta Chimica Slovenica     Open Access   (Followers: 1)
Acta Chromatographica     Full-text available via subscription   (Followers: 9)
Acta Facultatis Medicae Naissensis     Open Access  
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 7)
Acta Scientifica Naturalis     Open Access   (Followers: 3)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 8)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 9)
Adsorption Science & Technology     Open Access   (Followers: 6)
Advanced Functional Materials     Hybrid Journal   (Followers: 60)
Advanced Science Focus     Free   (Followers: 5)
Advances in Chemical Engineering and Science     Open Access   (Followers: 69)
Advances in Chemical Science     Open Access   (Followers: 18)
Advances in Chemistry     Open Access   (Followers: 22)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 19)
Advances in Drug Research     Full-text available via subscription   (Followers: 25)
Advances in Environmental Chemistry     Open Access   (Followers: 7)
Advances in Enzyme Research     Open Access   (Followers: 10)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 9)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 16)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 12)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 26)
Advances in Nanoparticles     Open Access   (Followers: 15)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 17)
Advances in Polymer Science     Hybrid Journal   (Followers: 45)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 18)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 20)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 6)
Advances in Science and Technology     Full-text available via subscription   (Followers: 12)
African Journal of Bacteriology Research     Open Access  
African Journal of Chemical Education     Open Access   (Followers: 3)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 8)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Al-Kimia : Jurnal Penelitian Sains Kimia     Open Access  
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 2)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 67)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 21)
American Journal of Chemistry     Open Access   (Followers: 31)
American Journal of Plant Physiology     Open Access   (Followers: 11)
American Mineralogist     Hybrid Journal   (Followers: 15)
Analyst     Full-text available via subscription   (Followers: 38)
Angewandte Chemie     Hybrid Journal   (Followers: 171)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 255)
Annales UMCS, Chemia     Open Access   (Followers: 1)
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 5)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 3)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 4)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 9)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 12)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 13)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antiviral Chemistry and Chemotherapy     Open Access   (Followers: 2)
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 9)
Applied Spectroscopy     Full-text available via subscription   (Followers: 24)
Applied Surface Science     Hybrid Journal   (Followers: 32)
Arabian Journal of Chemistry     Open Access   (Followers: 6)
ARKIVOC     Open Access   (Followers: 1)
Asian Journal of Biochemistry     Open Access   (Followers: 2)
Asian Journal of Chemistry and Pharmaceutical Sciences     Open Access  
Atomization and Sprays     Full-text available via subscription   (Followers: 4)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 7)
Autophagy     Hybrid Journal   (Followers: 2)
Avances en Quimica     Open Access  
Biochemical Pharmacology     Hybrid Journal   (Followers: 10)
Biochemistry     Hybrid Journal   (Followers: 369)
Biochemistry Insights     Open Access   (Followers: 6)
Biochemistry Research International     Open Access   (Followers: 6)
BioChip Journal     Hybrid Journal  
Bioinorganic Chemistry and Applications     Open Access   (Followers: 10)
Bioinspired Materials     Open Access   (Followers: 5)
Biointerface Research in Applied Chemistry     Open Access   (Followers: 2)
Biointerphases     Open Access   (Followers: 1)
Biology, Medicine, & Natural Product Chemistry     Open Access   (Followers: 2)
Biomacromolecules     Hybrid Journal   (Followers: 22)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 11)
Biomedical Chromatography     Hybrid Journal   (Followers: 7)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 3)
BioNanoScience     Partially Free   (Followers: 5)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 134)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 87)
Bioorganic Chemistry     Hybrid Journal   (Followers: 10)
Biopolymers     Hybrid Journal   (Followers: 18)
Biosensors     Open Access   (Followers: 2)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 1)
Bitácora Digital     Open Access  
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 1)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 24)
Bulletin of the Korean Chemical Society     Hybrid Journal   (Followers: 1)
C - Journal of Carbon Research     Open Access   (Followers: 3)
Cakra Kimia (Indonesian E-Journal of Applied Chemistry)     Open Access  
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 2)
Canadian Journal of Chemistry     Hybrid Journal   (Followers: 10)
Canadian Mineralogist     Full-text available via subscription   (Followers: 6)
Carbohydrate Research     Hybrid Journal   (Followers: 26)
Carbon     Hybrid Journal   (Followers: 70)
Catalysis for Sustainable Energy     Open Access   (Followers: 8)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 7)
Catalysis Science and Technology     Free   (Followers: 8)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysts     Open Access   (Followers: 10)
Cellulose     Hybrid Journal   (Followers: 7)
Cereal Chemistry     Full-text available via subscription   (Followers: 4)
ChemBioEng Reviews     Full-text available via subscription   (Followers: 1)
ChemCatChem     Hybrid Journal   (Followers: 8)
Chemical and Engineering News     Free   (Followers: 22)
Chemical Bulletin of Kazakh National University     Open Access  
Chemical Communications     Full-text available via subscription   (Followers: 74)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 26)
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 3)
Chemical Research in Toxicology     Hybrid Journal   (Followers: 22)
Chemical Reviews     Hybrid Journal   (Followers: 197)
Chemical Science     Open Access   (Followers: 26)
Chemical Technology     Open Access   (Followers: 28)
Chemical Vapor Deposition     Hybrid Journal   (Followers: 5)
Chemie in Unserer Zeit     Hybrid Journal   (Followers: 57)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 24)
ChemInform     Hybrid Journal   (Followers: 8)
Chemistry & Biodiversity     Hybrid Journal   (Followers: 7)
Chemistry & Biology     Full-text available via subscription   (Followers: 32)
Chemistry & Industry     Hybrid Journal   (Followers: 7)
Chemistry - A European Journal     Hybrid Journal   (Followers: 159)
Chemistry - An Asian Journal     Hybrid Journal   (Followers: 16)
Chemistry and Materials Research     Open Access   (Followers: 21)
Chemistry Central Journal     Open Access   (Followers: 4)
Chemistry Education Research and Practice     Free   (Followers: 5)
Chemistry in Education     Open Access   (Followers: 9)
Chemistry International     Open Access   (Followers: 3)
Chemistry Letters     Full-text available via subscription   (Followers: 44)
Chemistry of Materials     Hybrid Journal   (Followers: 266)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 9)
Chemistry World     Full-text available via subscription   (Followers: 20)
Chemistry-Didactics-Ecology-Metrology     Open Access   (Followers: 1)
ChemistryOpen     Open Access   (Followers: 1)
Chemkon - Chemie Konkret, Forum Fuer Unterricht Und Didaktik     Hybrid Journal  
Chemoecology     Hybrid Journal   (Followers: 4)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 15)
Chemosensors     Open Access  
ChemPhysChem     Hybrid Journal   (Followers: 12)
ChemPlusChem     Hybrid Journal   (Followers: 2)
ChemTexts     Hybrid Journal  
CHIMIA International Journal for Chemistry     Full-text available via subscription   (Followers: 2)
Chinese Journal of Chemistry     Hybrid Journal   (Followers: 6)
Chinese Journal of Polymer Science     Hybrid Journal   (Followers: 11)
Chromatographia     Hybrid Journal   (Followers: 24)
Chromatography     Open Access   (Followers: 2)
Chromatography Research International     Open Access   (Followers: 6)
Cogent Chemistry     Open Access   (Followers: 2)
Colloid and Interface Science Communications     Open Access  
Colloid and Polymer Science     Hybrid Journal   (Followers: 11)
Colloids and Interfaces     Open Access  
Colloids and Surfaces B: Biointerfaces     Hybrid Journal   (Followers: 6)
Combinatorial Chemistry & High Throughput Screening     Hybrid Journal   (Followers: 4)
Combustion Science and Technology     Hybrid Journal   (Followers: 22)
Comments on Inorganic Chemistry: A Journal of Critical Discussion of the Current Literature     Hybrid Journal   (Followers: 2)
Communications Chemistry     Open Access  
Composite Interfaces     Hybrid Journal   (Followers: 7)
Comprehensive Chemical Kinetics     Full-text available via subscription   (Followers: 1)
Comptes Rendus Chimie     Full-text available via subscription  
Comptes Rendus Physique     Full-text available via subscription   (Followers: 1)
Computational and Theoretical Chemistry     Hybrid Journal   (Followers: 9)
Computational Biology and Chemistry     Hybrid Journal   (Followers: 12)
Computational Chemistry     Open Access   (Followers: 2)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 10)
Coordination Chemistry Reviews     Full-text available via subscription   (Followers: 4)
Copernican Letters     Open Access   (Followers: 1)
Corrosion Series     Full-text available via subscription   (Followers: 6)
Critical Reviews in Biochemistry and Molecular Biology     Hybrid Journal   (Followers: 6)
Croatica Chemica Acta     Open Access  
Crystal Structure Theory and Applications     Open Access   (Followers: 4)
CrystEngComm     Full-text available via subscription   (Followers: 13)
Current Catalysis     Hybrid Journal   (Followers: 2)
Current Chromatography     Hybrid Journal  
Current Green Chemistry     Hybrid Journal   (Followers: 1)
Current Metabolomics     Hybrid Journal   (Followers: 5)
Current Microwave Chemistry     Hybrid Journal  
Current Opinion in Colloid & Interface Science     Hybrid Journal   (Followers: 9)
Current Opinion in Molecular Therapeutics     Full-text available via subscription   (Followers: 14)
Current Research in Chemistry     Open Access   (Followers: 9)
Current Science     Open Access   (Followers: 71)
Current Trends in Biotechnology and Chemical Research     Open Access   (Followers: 3)
Dalton Transactions     Full-text available via subscription   (Followers: 23)
Detection     Open Access   (Followers: 3)
Developments in Geochemistry     Full-text available via subscription   (Followers: 2)
Diamond and Related Materials     Hybrid Journal   (Followers: 12)
Dislocations in Solids     Full-text available via subscription  

        1 2 3 4 | Last

Journal Cover
Al-Kimia : Jurnal Penelitian Sains Kimia
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2302-2736 - ISSN (Online) 2549-9335
Published by Universitas Islam Negeri Alauddin Makassar Homepage  [6 journals]
  • Analisis Hubungan Kuantitatif Struktur dan Aktivitas untuk Merancang
           Insektisida Baru Turunan Karbamat Menggunakan Metoda Semiempirik PM3

    • Authors: Agus Dwi Ananto
      Pages: 100 - 108
      Abstract: A research has been conducted to investigate the HKSA equation model of a set of carbamic derivative insecticidal compounds based on the hydrofobic, electronic and steric descriptors. The descriptors are calculated by a method of PM3 while the the insecticidal activity are obtained by the experiment. The relationship of the descriptos and the activities are determined by multilinear reggression analysis. The result of the analysis then provide a best equation model that can be used to design new carbamic derivative insecticidal compounds. These design might be recommended  to be synthesized in the experimental works.
      PubDate: 2017-12-29
      DOI: 10.24252/al-kimia.v5i2.3639
      Issue No: Vol. 5, No. 2 (2017)
       
  • Pemanfaatan Limbah Kulit Buah Pinang (Areca chatecu L.) Sebagai Biosorben
           untuk Mengolah Logam Berat Pb (II)

    • Authors: Lisa Utami, Lazulva Lazulva
      Pages: 109 - 118
      Abstract: This research aims to investigate the utilization of the waste of Pinang Fruit peel as a biosorbent which function to process Pb (II) from contaminated water. The result showed that the absorbtion ability of Pb (II) was strongly influenced by the acidity of solution, contact duration and the initial concentration of the Pb (II) solution. The maximum absorbtion was 92,50% at pH 6, initial concentration of 50 ppm in 75 minutes contact time. FTIR spectral data indicated the presence of  amina, alcohol and carbonil groups. Isotherm Langmuir was at the maximum absorbtion of 0,877 mg/g.
      PubDate: 2017-12-31
      DOI: 10.24252/al-kimia.v5i2.3524
      Issue No: Vol. 5, No. 2 (2017)
       
  • Hidroksiapatit dari Tulang Ikan Tuna Sirip Kuning (Tunnus albacores)
           dengan Metode Presipitasi

    • Authors: Mutmainnah Mutmainnah, Sitti Chadijah, Wa Ode Rustiah
      Pages: 119 - 126
      Abstract: Indonesia as one of the biggest tuna fish produsers in the world, produce tuna fish bones large enough. Since tuna fish bone contain high calcium it is potentially to be the raw material of hydroxyapatite. Hydroxyapatite are inorganic compounds constituent of bones and teeth has the moleculer formula Ca5(PO4)3OH. Synthesis of hydroxyapatite can be done with precipitation method through tuna fish bone calcination process at the temperature 900°C for 5 hours to obtain calcium compounds in the form of calcium oxide. Calcium wich has been obtained added phosphoric acid 0,6 M with flow rate/rapid 1 mL/minute. Controlled synthesis process parameters are pH 10 of solution. Yield of hydroxyapatite generated after synthesis with of the precipitation time 12 hours are of 91.15%. hydroxyapatite product obtained was analyzed by FTIR(Fourier Transform Infrared) and XRD (X-Ray Diffraction). FTIR analysis indicate the presence of OH groups, PO4 and CO3. Based on the resulting diffraction of XRD analysis, crystallite size obtained each of 211.29 nm structure is hexagonal. Scherrer method was used to obtain crystallite size.
      PubDate: 2017-12-31
      DOI: 10.24252/al-kimia.v5i2.3422
      Issue No: Vol. 5, No. 2 (2017)
       
  • Sintesis Zeolit dari Abu Layang dengan Metode Hidrotermal dan Uji
           Adsorptivitas Terhadap Logam Timbal (Pb)

    • Authors: Rismang Rismang, Syamsidar HS Syamsidar HS, Kurnia Ramadani
      Pages: 127 - 135
      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.
      PubDate: 2017-12-29
      DOI: 10.24252/al-kimia.v5i2.3394
      Issue No: Vol. 5, No. 2 (2017)
       
  • Potensi Zat Warna dari Ekstrak Etanol Kayu Sappang Sebagai
           KalorimetriAnion

    • Authors: Nurmala Sari, Rachma Rachma, Santi Santi
      Pages: 136 - 144
      Abstract: Dye from Sappang Tree has been isolated using ethanol as a solvent. Braziline is one of the chemical compound found in the ethanol extract. The Compound can be used as anion calorimethric due to their active sites of hydroxyl and chromophore groups. Dyes from sappang tree has been tested on 10 g of several types of saturated anions (carbonate, sulfate, phosphate, cyanide, acetate, borax, nitrite, chloride, bromide, and iodide). The results of the tests show that the color of the dye from changes in carbonate, phosphate, cyanide, acetate, nitrite, and hydroxyl. Spectrophotometer UV/Vis is used to detect the limit of cyanide anion. Metanol and acetone show positive results on the dye in cyanide anion. Detection limit of braziline is 3x10-4 M. By addition of cyanide anion, the dye has detection limit at 1x10-4 M. 
      PubDate: 2017-12-31
      DOI: 10.24252/al-kimia.v5i2.3540
      Issue No: Vol. 5, No. 2 (2017)
       
  • Uji Aktivitas Antioksidan Ekstrak Metanol Daun Pecah Beling Strobilanthes
           Crispus

    • Authors: Arniah Dali, Haeruddin Haeruddin, Wa Ode Yusmita Miranda, Nasriadi Dali
      Pages: 145 - 153
      Abstract: The antioxidant activity test of methanol extracts of the leaves nasty shard Strobilanthes crispus has been done. This study aims to test the phytochemical and antioxidant activity of methanol extracts of the leaves nasty shard Strobilanthes crispus. The leaves nasty shard are macerated with methanol for 3x24 hours. Further methanol extract was tested phytochemically and antioxidant activity by DPPH method (1,1-Diphenyl-2-picrylhydrazil). The result of phytochemical test showed that the methanol extract of the leaves nasty shard Strobilanthes crispus contain secondary metabolites of alkaloids, flavonoids, and saponins. The result of antioxidant activity test showed that the methanol extract of the leaves nasty shard Strobilanthes crispus have antioxidant activity with IC50 of 100,363 ppm.
      PubDate: 2017-12-31
      DOI: 10.24252/al-kimia.v5i2.3642
      Issue No: Vol. 5, No. 2 (2017)
       
  • Sintesis N-p-Metilbenzil-p-Kumaramida dari Asam p-Kumarat

    • Authors: Nasriadi Dali, Arniah Dali
      Pages: 154 - 160
      Abstract: N-p-Methylbenzyl-p-coumaramide has been synthesized from p-coumaric acid. The purpose of this study was to synthesize N-p-methylbenzyl-p-coumaramide compounds from p-coumaric acid. The N-p-methylbenzyl-p-coumaramide target compound was obtained by direct conversion method using a orthoboric acid catalyst. Target compounds were identified and characterized by melting point, TLC test, FTIR, 1H-NMR, and 13C-NMR spectrometer. The results showed that N-p-methylbenzyl-p-coumaramide compound obtained was white solid (yield 75.83%) with melting point 156-158 oC and TLC (SiO2, n-hexane : chloroform = 5: 3 v/v, Rf = 0.37).
       
      PubDate: 2017-12-31
      DOI: 10.24252/al-kimia.v5i2.3643
      Issue No: Vol. 5, No. 2 (2017)
       
  • Penguraian Zat Warna Tartrazin pada Limbah Pencucian Mie Aceh Secara
           Ozonolisis dan Penyinaran Matahari dengan Penambahan Katalis ZnO

    • Authors: Bhayu Gita Bhernama
      Pages: 161 - 169
      Abstract: People's habits in consuming Aceh noodles make the noodle industry grow rapidly, but the waste treatment process becomes less effective. In the process of making the noodles, dye waste is produced in the form of tartrazine dye and need to be processed before being disposed into the environment. The research purpose was to describe the decomposition of tartrazine using ozonolysis and solar radiation methods as one of the solutions in the waste treatment process. The use of ZnO as catalyst is to accelerate the decomposition reaction of the noodle washing wastes. The results of the analysis concluded that ozonolysis methods are more effective in decomposing tartrazine in the noodle wash wasted by solar irradiation method. The sun exposure decomposed tartrazine by 99.74% using 0.015 g ZnO for 150 min and tartrazine content obtained 0.022 mg/L with a sunlight intensity of 1.24 x 1016 cm-2 s-1. Ozonolisis exposure decomposed tartrazine by 98.68% using 0.020 g ZnO for 12 minutes and tartrazine content obtained 0.112 mg / L.
      PubDate: 2017-12-31
      DOI: 10.24252/al-kimia.v5i2.3641
      Issue No: Vol. 5, No. 2 (2017)
       
  • Pengaruh Kandungan Senyawa pada Ekstrak Daun Ketapang n-Heksan, Etil
           Asetat, Metanol dan Campuran Terhadap Nilai Efisiensi Dye Sensitized Solar
           Cell (DSSC)

    • Authors: Kurnia Arini Putri, Aisyah Aisyah, Suriani Suriani, Iswadi Iswadi
      Pages: 170 - 180
      Abstract: The needs of electrical energy that increase year by year cause electrical energy crisis. Alternative energy sources which are potential to be developed as a substitute of fossil fuels are organic solar cells or DSSC (Dye Sensitized Solar Cell). The purpose of this study is to determine the value of efficiency resulting from Ketapang leaf extract and to determine the effect of compound content in Ketapang leaf extract toward the value of DSSC efficiency. This study investigate the efficiency value of the DSSC which are senzitized by the N-hexane, ethyl acetate, methanol extract of the Ketapang leaf and the mixture extract. The compounds from each axtract are characterized used UV-Vis and FTIR. The measurement results of the efficiency value from n-hexane of Ketapang leaf extract, ethyl acetate, methanol and the mixture were respectively 0.0051%, 0.09%, 0.12% and 0.22%. The results of UV-Vis characterization with maximum wavelength were respectively 667 nm, 665.9 nm, 665.9  nm and 209 nm. The FTIR identified an auxchrome group such as -OH,  C-N, -NH, and C-O as well as chromophore groups such as C=O and C=C. These data support that the existence of flavonoid and alcaloid compound in the mixture extract generate significant efficiency value.
      PubDate: 2017-12-30
      DOI: 10.24252/al-kimia.v5i2.3856
      Issue No: Vol. 5, No. 2 (2017)
       
  • Karakteristik Edible Film dari Pati Kentang (Solanum Tuberosum L.) dengan
           Penambahan Gliserol

    • Authors: Sjamsiah Sjamsiah, Jawiana Saokani, Lismawati Lismawati
      Pages: 181 - 192
      Abstract: Edible film is a thin layer that serve as the packaging or upholstery as well as food that can be eaten with a product. It is packaged and can be degraded by nature. Potato starch can be used as raw material in manufacturing edible film, in which the addition of glycerol is needed as a plasticizer that function to improve the elasticity of the edible film. The goal of the research is to know the influence of glycerol concentration variation against the characteristics of edible film of starch potatoes (Solanum tuberosum L.) the parameters examined in this study i.e the physical test that includes a test of strong thickness, tensile test and present enlargement, test the solubility and organoleptic. To help figure out the data obtained in the real effect or not, is done using the SPSS Analysis Variant 1 direction or one-way ANOVA. Characteristics of edible film from potato starch with addition of glycerol with a concentration of 20%, 30% and 40% (v/v) to the value of the thickness of consecutive 0,058 mm, 0,062 mm and 0,071mm. The value of the tensile strengh i.e 0,75 N/mm2, 0,69 N/mm2 and 0,35 N/mm2. The value obtained by elongation percent 4,96%, 9,04% and 9,51% where as the value of solubility is obtained that is 19%, 21,4% and 34,6%. Application of edible films from potato starch as the packaging on candy jelly can be acceptedas alternative packaging material for food.

      PubDate: 2017-12-31
      DOI: 10.24252/al-kimia.v5i2.3932
      Issue No: Vol. 5, No. 2 (2017)
       
  • Penggunaan Enzim α-Amilase dari Saccharomycopsis fibuligera R64 untuk
           Peningkatan Kualitas Roti Komposit Terigu-Ubi Jalar Ungu

    • Authors: Agus Safari, Safri Ishmayana, Sylvi Qurrotul Aini, Saadah D. Rachman, Muhammad Yusuf, Muhammad Fadhlillah, Endah Wulandari, Idar Idar
      Pages: 193 - 207
      Abstract: Purple sweet potato (Ipomoea batatas var. Ayamurasaki) is one of typical sweet tubers which is also commonly well known as Ipomoea blackie due to blackish purple (solid purple) tuber skin and flesh. The sweet potato can be transformed into flour or pasta and used to substitute wheat flour in the production of composite bread. Instead of synthetic chemical compounds, α-amylase isolated from the yeast Saccharomycopsis fibuligera can be added to the flour or dough of the composite bread to improve its quality. The purpose of the present study was to investigate the effect of α–amylase addition on the quality of the purple sweet potato flour and pasta composite bread. The observed properties of the bread were crumbs morphology of the bread, volume increment, bread height, texture, and organoleptic test. The results showed that addition of the α-amylase to the dough of the composite bread increased the volume increment value from 155.0% to 177.1% and from 335.7% to 342.1% for the sweet potato flour and pasta bread composite, respectively. While height of the bread increased from 4.7 to 5.1 cm and from 6.9 to 7.8 cm after addition of the enzyme for the sweet potato flour and pasta bread composite, respectively. Composite bread with α-amylase addition has softer texture and higher preference. Morphology examination result showed that starch granules in the bread crums with α-amylase treatment were disrupted. Most plausibly, the enzymes degrade the starch granules and produced dextrin which inhibited the cross linking formation between starch and protein, and therefore, the speed of hardening process of the bread can be reduced.
      PubDate: 2017-12-31
      DOI: 10.24252/al-kimia.v5i2.3861
      Issue No: Vol. 5, No. 2 (2017)
       
 
 
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