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  Subjects -> SCIENCES: COMPREHENSIVE WORKS (Total: 426 journals)
Showing 1 - 200 of 265 Journals sorted alphabetically
AAS Open Research     Open Access   (Followers: 1)
ABC Journal of Advanced Research     Open Access  
Accountability in Research: Policies and Quality Assurance     Hybrid Journal   (Followers: 22)
Acta Materialia Transilvanica     Open Access  
Acta Nova     Open Access   (Followers: 1)
Acta Scientifica Malaysia     Open Access  
Acta Scientifica Naturalis     Open Access   (Followers: 3)
Adıyaman University Journal of Science     Open Access  
Advanced Science     Open Access   (Followers: 13)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 11)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 5)
Advances in Research     Open Access  
Advances in Science and Technology     Full-text available via subscription   (Followers: 17)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 8)
Afrique Science : Revue Internationale des Sciences et Technologie     Open Access   (Followers: 2)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 4)
American Academic & Scholarly Research Journal     Open Access   (Followers: 6)
American Journal of Applied Sciences     Open Access   (Followers: 27)
American Journal of Humanities and Social Sciences     Open Access   (Followers: 17)
ANALES de la Universidad Central del Ecuador     Open Access   (Followers: 4)
Anales del Instituto de la Patagonia     Open Access  
Applied Mathematics and Nonlinear Sciences     Open Access   (Followers: 1)
Apuntes de Ciencia & Sociedad     Open Access  
Arab Journal of Basic and Applied Sciences     Open Access  
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives Internationales d'Histoire des Sciences     Partially Free   (Followers: 7)
Archives of Current Research International     Open Access  
ARO. The Scientific Journal of Koya University     Open Access  
ARPHA Conference Abstracts     Open Access   (Followers: 6)
ARPHA Proceedings     Open Access   (Followers: 5)
ArtefaCToS : Revista de estudios sobre la ciencia y la tecnología     Open Access   (Followers: 1)
Asia-Pacific Journal of Science and Technology     Open Access  
Asian Journal of Advanced Research and Reports     Open Access   (Followers: 2)
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 2)
Asian Journal of Scientific Research     Open Access   (Followers: 3)
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 7)
Australian Field Ornithology     Full-text available via subscription   (Followers: 4)
Australian Journal of Social Issues     Hybrid Journal   (Followers: 7)
AZimuth     Full-text available via subscription   (Followers: 2)
Bangladesh Journal of Scientific Research     Open Access   (Followers: 1)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 3)
Berichte Zur Wissenschaftsgeschichte     Hybrid Journal   (Followers: 10)
Berkeley Scientific Journal     Full-text available via subscription  
BIBECHANA     Open Access   (Followers: 2)
BibNum     Open Access  
Bilge International Journal of Science and Technology Research     Open Access   (Followers: 1)
Bioethics Research Notes     Full-text available via subscription   (Followers: 16)
Bistua : Revista de la Facultad de Ciencias Básicas     Open Access  
BJHS Themes     Open Access   (Followers: 1)
Black Sea Journal of Engineering and Science     Open Access  
Borneo Journal of Resource Science and Technology     Open Access  
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Bulletin de la Société Royale des Sciences de Liège     Open Access  
Bulletin of the National Research Centre     Open Access  
Butlletí de la Institució Catalana d'Història Natural     Open Access  
Central European Journal of Clinical Research     Open Access  
Chain Reaction     Full-text available via subscription  
Ciencia & Natura     Open Access   (Followers: 1)
Ciencia Amazónica (Iquitos)     Open Access   (Followers: 1)
Ciencia en Desarrollo     Open Access   (Followers: 3)
Ciencia en su PC     Open Access   (Followers: 1)
Ciencia Ergo Sum     Open Access  
Ciência ET Praxis     Open Access  
Ciencia y Tecnología     Open Access  
Ciencia, Docencia y Tecnología     Open Access  
Ciencias Holguin     Open Access   (Followers: 2)
CienciaUAT     Open Access   (Followers: 1)
Citizen Science : Theory and Practice     Open Access   (Followers: 2)
Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering     Open Access  
Communications in Applied Sciences     Open Access  
Comprehensive Therapy     Hybrid Journal   (Followers: 3)
Comunicata Scientiae     Open Access   (Followers: 1)
ConCiencia     Open Access  
Conference Papers in Science     Open Access   (Followers: 2)
Configurations     Full-text available via subscription   (Followers: 10)
COSMOS     Hybrid Journal   (Followers: 1)
Crea Ciencia Revista Científica     Open Access   (Followers: 2)
Cuadernos de Investigación UNED     Open Access  
Current Issues in Criminal Justice     Hybrid Journal   (Followers: 15)
Current Research in Geoscience     Open Access   (Followers: 8)
Dalat University Journal of Science     Open Access  
Data     Open Access   (Followers: 5)
Data Curation Profiles Directory     Open Access   (Followers: 5)
Dhaka University Journal of Science     Open Access  
Dharmakarya     Open Access  
Diálogos Interdisciplinares     Open Access  
Digithum     Open Access   (Followers: 2)
Discover Sustainability     Open Access   (Followers: 3)
Einstein (São Paulo)     Open Access  
Ekaia : EHUko Zientzia eta Teknologia aldizkaria     Open Access  
Elkawnie : Journal of Islamic Science and Technology     Open Access  
Emergent Scientist     Open Access  
Enhancing Learning in the Social Sciences     Open Access   (Followers: 9)
Enseñanza de las Ciencias : Revista de Investigación y Experiencias Didácticas     Open Access  
Entramado     Open Access  
Entre Ciencia e Ingeniería     Open Access   (Followers: 1)
Epiphany     Open Access   (Followers: 4)
Ergo     Open Access  
Estação Científica (UNIFAP)     Open Access   (Followers: 1)
Ethiopian Journal of Education and Sciences     Open Access   (Followers: 6)
Ethiopian Journal of Science and Technology     Open Access  
Ethiopian Journal of Sciences and Sustainable Development     Open Access   (Followers: 5)
European Online Journal of Natural and Social Sciences     Open Access   (Followers: 12)
European Scientific Journal     Open Access   (Followers: 10)
Evidência - Ciência e Biotecnologia - Interdisciplinar     Open Access  
Exchanges : the Warwick Research Journal     Open Access   (Followers: 2)
Experimental Results     Open Access   (Followers: 1)
Extensionismo, Innovación y Transferencia Tecnológica     Open Access   (Followers: 3)
Facets     Open Access  
Fides et Ratio : Revista de Difusión Cultural y Científica     Open Access   (Followers: 1)
Fırat University Turkish Journal of Science & Technology     Open Access  
Fontanus     Open Access  
Forensic Science Policy & Management: An International Journal     Hybrid Journal   (Followers: 378)
Frontiers for Young Minds     Open Access  
Frontiers in Climate     Open Access   (Followers: 3)
Frontiers in Science     Open Access   (Followers: 1)
Fundamental Research     Open Access  
Futures & Foresight Science     Hybrid Journal   (Followers: 4)
Gaudium Sciendi     Open Access   (Followers: 1)
Gazi University Journal of Science     Open Access  
Ghana Studies     Full-text available via subscription   (Followers: 15)
Global Journal of Pure and Applied Sciences     Full-text available via subscription  
Global Journal of Science Frontier Research     Open Access   (Followers: 2)
Globe, The     Full-text available via subscription   (Followers: 4)
HardwareX     Open Access  
Heidelberger Jahrbücher Online     Open Access  
Heliyon     Open Access  
Himalayan Journal of Science and Technology     Open Access   (Followers: 1)
History of Science and Technology     Open Access   (Followers: 1)
Hoosier Science Teacher     Open Access  
Iberoamerican Journal of Science Measurement and Communication     Open Access  
Impact     Open Access   (Followers: 2)
Indian Journal of History of Science     Hybrid Journal   (Followers: 2)
Indonesian Journal of Fundamental Sciences     Open Access  
Indonesian Journal of Science and Mathematics Education     Open Access   (Followers: 4)
Indonesian Journal of Science and Technology     Open Access  
Ingenieria y Ciencia     Open Access   (Followers: 1)
Innovare : Revista de ciencia y tecnología     Open Access  
Instruments     Open Access  
Integrated Research Advances     Open Access  
Interciencia     Open Access   (Followers: 1)
Interface Focus     Full-text available via subscription  
International Annals of Science     Open Access  
International Archives of Science and Technology     Open Access  
International Journal of Academic Research in Business, Arts & Science     Open Access   (Followers: 2)
International Journal of Advanced Multidisciplinary Research and Review     Open Access  
International Journal of Applied Science     Open Access  
International Journal of Basic and Applied Sciences     Open Access   (Followers: 4)
International Journal of Computational and Experimental Science and Engineering (IJCESEN)     Open Access  
International Journal of Culture and Modernity     Open Access   (Followers: 4)
International Journal of Engineering, Science and Technology     Open Access  
International Journal of Innovation and Applied Studies     Open Access   (Followers: 12)
International Journal of Innovative Research and Scientific Studies     Open Access   (Followers: 6)
International Journal of Network Science     Hybrid Journal   (Followers: 3)
International Journal of Recent Contributions from Engineering, Science & IT     Open Access   (Followers: 1)
International Journal of Research in Science     Open Access   (Followers: 2)
International Journal of Science & Emerging Technologies     Open Access   (Followers: 1)
International Journal of Social Sciences and Management     Open Access   (Followers: 3)
International Journal of Technology Policy and Law     Hybrid Journal   (Followers: 7)
International Letters of Social and Humanistic Sciences     Open Access   (Followers: 1)
International Review of Applied Sciences     Open Access  
InterSciencePlace     Open Access   (Followers: 1)
Investiga : TEC     Open Access  
Investigación Joven     Open Access  
Investigación Valdizana     Open Access  
Investigacion y Ciencia     Open Access   (Followers: 1)
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
iScience     Open Access   (Followers: 2)
Issues in Science & Technology     Free   (Followers: 7)
Ithaca : Viaggio nella Scienza     Open Access  
J : Multidisciplinary Scientific Journal     Open Access  
Jaunujų mokslininkų darbai     Open Access   (Followers: 1)
Journal de la Recherche Scientifique de l'Universite de Lome     Full-text available via subscription   (Followers: 2)
Journal of Chromatography & Separation Techniques     Open Access   (Followers: 12)
Journal of Advanced Research     Open Access   (Followers: 3)
Journal of Al-Qadisiyah for Pure Science     Open Access   (Followers: 1)
Journal of Alasmarya University     Open Access   (Followers: 2)
Journal of Analytical Science & Technology     Open Access   (Followers: 6)
Journal of Applied Science and Technology     Full-text available via subscription   (Followers: 1)
Journal of Applied Sciences and Environmental Management     Open Access   (Followers: 3)
Journal of Big History     Open Access   (Followers: 3)
Journal of Composites Science     Open Access   (Followers: 3)
Journal of Critical Thought and Praxis     Open Access   (Followers: 2)
Journal of Deliberative Mechanisms in Science     Open Access  
Journal of Diversity Management     Open Access   (Followers: 6)
Journal of Indian Council of Philosophical Research     Hybrid Journal  
Journal of Institute of Science and Technology     Open Access  
Journal of Integrated Science and Technology     Open Access  
Journal of Interaction Science     Open Access   (Followers: 1)
Journal of Kerbala University     Open Access   (Followers: 1)
Journal of King Saud University - Science     Open Access   (Followers: 1)
Journal of Mathematical and Fundamental Sciences     Open Access  
Journal of Natural Sciences and Mathematics Research     Open Access  
Journal of Natural Sciences Research     Open Access   (Followers: 4)
Journal of Negative and No Positive Results     Open Access  
Journal of Responsible Technology     Open Access   (Followers: 1)
Journal of Science (JSc)     Open Access  
Journal of Science and Engineering     Open Access  
Journal of Science and Technology     Open Access   (Followers: 2)
Journal of Science and Technology     Open Access   (Followers: 1)

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Elkawnie : Journal of Islamic Science and Technology
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2460-8912 - ISSN (Online) 2460-8920
Published by UIN Ar-Raniry Banda Aceh Homepage  [9 journals]
  • Climate-Responsiveness Embodied in Modern Mosque Design

    • Authors: Era Nopera Rauzi, Izziah Hasan, Laina Hilma Sari
      Abstract: Abstract: A mosque is a place of worship for Muslims. Modernity concept to visualize the simple form in a mosque is relevant, which would help the worshippers to be more solemn. Office buildings, mainly located in Aceh, known as Serambi Mekkah, are required to provide a mosque in the office environment. Since its concept transforms from traditional style to modern style, the mosque in the office area is designed in modernity. The study purposes of enabling climate-responsive principles in mosque design for achieving indoor thermal comfort. Even though without available power support. The design method approached problem-solving by creating the building friendly to the environment and achieving indoor thermal comfort. This study used trial and error through modeling appropriate to climate-responsiveness mosque design in the office area. Furthermore, this study would be continued in complex buildings, namely schools and offices, promoting environmentally-friendly to be applied in building design. Abstrak: Masjid adalah tempat ibadah bagi umat Islam. Konsep modernitas untuk memvisualisasikan bentuk sederhana di masjid adalah relevan, yang akan membantu jamaah untuk lebih khusyuk. Gedung perkantoran khususnya yang berada di Aceh yang dikenal dengan Serambi Mekkah wajib menyediakan mushola di lingkungan kantor. Karena konsepnya bertransformasi dari gaya tradisional ke gaya modern, masjid di area perkantoran juga didesain dengan gaya modern. Tujuan studi ini adalah untuk mengaktifkan prinsip responsif iklim dalam desain masjid untuk mencapai kenyamanan termal dalam ruangan meskipun tanpa dukungan daya yang tersedia. Metode desain pada studi ini menggunakanpendekatan pemecahan masalah untuk menciptakan bangunan ramah lingkungan dan mencapai kenyamanan termal dalam ruangan. Penelitian ini menggunakan metode trial and error melalui pemodelan yang sesuai dengan desain masjid yang responsif terhadap iklim di kawasan perkantoran. Selanjutnya studi ini akan dilanjutkan penerapannya pada bangunan kompleks seperti sekolah dan perkantoran untuk mempromosikan desain bangunan ramah lingkungan.
      PubDate: 2021-09-28
      DOI: 10.22373/ekw.v7i2.9138
      Issue No: Vol. 7, No. 2 (2021)
       
  • The Effect of Lemon (Citrus limon) Extract on The Quantity and Quality of
           Mice (Mus musculus) Sperm

    • Authors: Vitaloka Guci Rahayu, Evi Hanizar
      Abstract: Abstract: Vitamin C has been proved as a nutrient to improve the quality of sperm. Society believed that consuming the lemons could potentially enhance the sperm quality of humans. However, the appropriate concentration should be well studied to obtain the optimum concentration to improve the sperm quality and quantity. The present research tried to explain how lemon could improve the sperm quality by designing a true experimental using a series concentration of lemon extract (25%, 50%, and 75 % concentrations) given to the male mice (Mus musculus). The investigation was made by giving the lemon treatment three times a day for 5 weeks. To investigate the effect of lemon extract, the mice sperm were taken from the epididymis and observed using a multimedia microscope and counted using Neubauer’s counting rooms, while motility and morphology were observed using object-glass. The result showed that the high concentration of lemon could not provide the highest improvement of sperm quality and quantity. The optimum condition was seen in 25% of lemon extract, where the increase of lemon concentration suppressed the lemon improvement effect, which reduced the sperm quality and quantity. However, the improvement was still made if the result was compared to control, meaning consuming lemon was better than consuming any lemon treatment. The result was in accordance with quality improvement of sperm, where 25% of lemon concentration treatment provided the highest average motility and normal morphology of sperm. However, the high concentration of lemon extract (50% and 75% of lemon concentrations) provided a lower effect due to the adverse effect. The result proved that lemon could boost the quality and quantity of sperm in an appropriate concentration where the excess lemon extract could reduce the effect of lemon in improving sperm quality and quantity.Abstrak: Vitamin C telah terbukti sebagai nutrisi untuk meningkatkan kualitas sperma dimana masyarakat percaya bahwa mengkonsumsi lemon berpotensi meningkatkan kualitas sperma manusia. Namun, konsentrasi yang tepat harus dipelajari dengan baik untuk mendapatkan konsentrasi yang optimal untuk meningkatkan kualitas dan kuantitas sperma. Penelitian ini mencoba memberikan informasi bagaimana lemon dapat meningkatkan kualitas sperma dengan merancang eksperimen nyata menggunakan serangkaian konsentrasi ekstrak lemon (konsentrasi 25%, 50% dan 75%) yang diberikan kepada mencit jantan (Mus musculus). Penyelidikan dilakukan dengan memberikan ekstrak lemon sebanyak tiga kali dalam sehari selama 5 minggu. Untuk mengetahui pengaruh ekstrak lemon, sperma mencit diambil dari epididimis dan diamati menggunakan mikroskop multimedia dan dihitung menggunakan kamar hitung Neubauer, sedangkan motilitas dan morfologi diamati menggunakan kaca objek. Hasil penelitian menunjukkan bahwa konsentrasi lemon yang tinggi tidak dapat memberikan peningkatan kualitas dan kuantitas sperma yang tertinggi. Kondisi optimum terlihat pada ekstrak lemon 25% dimana peningkatan konsentrasi lemon menekan efek perbaikan lemon yang menurunkan kualitas dan kuantitas sperma. Namun perbaikan tetap dilakukan jika hasilnya dibandingkan dengan kontrol, artinya mengkonsumsi lemon lebih baik daripada tanpa mengkonsumsi lemon. Hasil tersebut sesuai dengan peningkatan kualitas sperma dimana perlakuan konsentrasi lemon 25% memberikan rata-rata motilitas dan morfologi sperma yang normal paling tinggi. Namun, konsentrasi tinggi ekstrak lemon (50% dan 75% konsentrasi lemon) memberikan efek yang lebih rendah karena efek samping. Hasil penelitian membuktikan bahwa lemon dapat digunakan untuk meningkatkan kualitas dan kuantitas sperma dalam konsentrasi yang sesuai dimana kelebihan ekstrak lemon dapat mengurangi efek lemon dalam meningkatkan kualitas dan kuantitas sperma.
      PubDate: 2021-09-28
      DOI: 10.22373/ekw.v7i2.9389
      Issue No: Vol. 7, No. 2 (2021)
       
  • A Pyrolysis of 80 Mesh Spirulina platensis Residue (SPR) With Fe3O4
           Catalyst

    • Authors: Siti Jamilatun, Lukhi Mulia Shitophyta, Heidy Oktavia Nisa, Mutia Endar Nurhidayah
      Abstract: Abstract: Spirulina platensis Residue (SPR) is obtained from the solid residue of Spirulina platensis extraction, which has high carbohydrate and protein content. Pyrolysis technology will convert SPR into a bio-oil, water phase, char, and gas (CO, CO2, H2, CH4) product with the potential as an environmentally friendly and sustainable fuel. This study aims to obtain data on the optimum conditions and product yield composition of SPR catalytic pyrolysis using the in-situ method.  Pyrolysis occurs in a fixed-bed reactor with SPR 50 gr feed and Fe3O4 catalyst (2.5 gr and 5 gr) at temperature variations of 300-600 °C with an average heating rate. 14.07 °C/min. The higher the pyrolysis temperature, the more bio-oil yield, the optimum at a temperature of 500 ⁰C. The use of 2.5 and 5-gram catalysts obtained bio-oil yields of 25.01 and 17.67 %. The yield of biochar will be lower with increasing pyrolysis temperature. The optimum condition for the gas production was achieved at 300 °C, using a catalyst of 2.5 and 5 grams, the yield of gas was 23.59, and 19.74 %. Moreover, the smaller the specific gravity and the higher the bio-oils pH, the better it is as a vehicle fuel.Abstrak: Spirulina platensis Residu (SPR) diperoleh dari residu padat ekstraksi Spirulina platensis yang memiliki kandungan karbohidrat dan protein tinggi. Teknologi pirolisis akan mengubah SPR menjadi produk bio-oil yang berpotensi sebagai bahan bakar ramah lingkungan dan berkelanjutan. Penelitian ini bertujuan untuk mendapatkan data kondisi optimum dan komposisi yield produk dari pirolisis katalitik SPR dengan metode in-situ. Pirolisis SPR akan menghasilkan produk berupa bio-oil, water phase, char dan gas (CO, CO2, H2, CH4). Pirolisis berlangsung dalam reaktor fixed-bed dengan umpan SPR 50 gr serta katalis Fe3O4 (2.5 gr dan  5 gr)  pada variasi suhu 300-600°C dengan heating rate rata-rata 14,07 °C/min. Semakin tinggi suhu pirolisis semakin banyak yield bio-oil, optimum pada suhu 500 ⁰C. Pemakaian katalis 2,5 dan 5 gram diperoleh yield bio-oil sebanyak 25,01 dan 17,67 %. Yield biochar akan semakin rendah dengan kenaikan suhu pirolisis. Kondisi optimum produk gas dicapai pada 300 °C dengan katalis 2,5 dan 5 gram diperoleh yield gas sebesar 23,59, dan 19,74 %. Hal tersebut mengakibatkan, semakin kecil berat jenis dan semakin tinggi pH bio-oil maka semakin baik sebagai bahan bakar kendaraan.
      PubDate: 2021-09-26
      Issue No: Vol. 7, No. 2 (2021)
       
  • Similarity Analysis of User Trajectories Based on Haversine Distance and
           Needleman Wunsch Algorithm

    • Authors: Mohammad Jamhuri, Mohammad Isa Irawan, Imam Mukhlash
      Abstract: Abstract: In this paper, we discuss the similarity between two trajectories using the Needleman Wunsch algorithm. The calculation steps are interpolating the trajectory, calculating the distance between the trajectory coordinates, identifying the equivalent length, transforming trajectories into a sequence of alphabetic letters, aligning the sequences, and measuring the magnitude of the similarity based on the alignment results. The similarity obtained is compared directly to the length of the trajectories shared by the two lines. The calculation results show that the accuracy of the alignment method reaches more than 90%. Abstrak: Dalam tulisan ini dibahas cara perhitungan persentase kesamaan dari dua buah lintasan menggunakan algoritma Needleman Wunsch dan perhitungan secara manual berdasarkan irisan dari lintasan-lintasan tersebut. Pada perhitungan menggunakan algoritma Needleman Wunsch, tahapan-tahapan yang dilakukan adalah menginterpolasi lintasan, menghitung jarak antara titik-titik koordinat dari kedua lintasan, mengidentifikasi jarak yang ekivalen, mengubah lintasan menjadi sekuens huruf alfabet, menyejajarkan sekuens, dan menentukan besarnya kesamaan berdasarkan hasil penyejajaran. Kesamaan yang diperoleh dari metode penyejajaran dibandingkan secara langsung dengan panjang jalur yang dilalui bersama oleh kedua lintasan, hasil perhitungan menunjukkan bahwa akurasi metode penyejajaran mencapai lebih dari 90%.
      PubDate: 2021-09-26
      DOI: 10.22373/ekw.v7i2.9232
      Issue No: Vol. 7, No. 2 (2021)
       
  • Effectiveness Bleaching of Waste Cooking Oil Cleaning Using
           Nano-Montmorillonite Adsorbent

    • Authors: Silvia Ningsih, Puji Wahyuningsih, Tisna Harmawan
      Abstract: Abstract: Waste cooking oil contains carcinogenic compounds which are formed during the frying process. The content change makes it is not worth for reuse cooking oil. One of the damages to cooking oil is caused by heating. The quality of useable oil refers to SNI 01-3741-2013. The sample used in this research is waste cooking oil that is used for 5 times of frying. The quality of the oil can be improved using Nano-Montmorillonite adsorbent. The results of PSA and FTIR characterization show that Nano-Montmorillonite has a nano-scale particle size of 15.3 nm with a percentage of 6%. The rest are particles that have a size> 100 nm with a total percentage of 94% with a respective size of 383.9 nm with a percentage of 59% and 6647.1 nm with a percentage of 35% and have functional groups, namely hydroxyl (-OH), Si-O-Si and Al-Al-OH. Testing of waste cooking oil quality includes organoleptic, acid numbers, peroxide numbers, and saponification numbers using Nano-Montmorillonite. Based on the results, the more Nano-Montmorillonite adsorbent was added, the lower the numbers of acid, peroxide, and saponification in waste cooking oil and the better the quality of flavor and color. Based on this analysis, Nano-Montmorillonite adsorbent can improve the quality of waste cooking oil.Abstrak: Minyak jelantah mengandung senyawa yang bersifat karsinogenik yang terbentuk selama proses penggorengan. Perubahan sifat ini menjadikan minyak goreng tersebut tidak layak digunakan kembali sebagai bahan makanan. Salah satu kerusakan pada minyak goreng disebabkan oleh pemanasan. Kualitas minyak layak pakai merujuk pada SNI 01-3741-2013. Sampel minyak yang digunakan dalam penelitian ini adalah  minyak jelantah dengan 5 kali penggorengan. Kualitas minyak tersebut dapat ditingkatkan menggunakan adsorben Nano-Montmorillonit. Berdasarkan hasil karakterisasi PSA dan FTIR menunjukkan bahwa Nano-Montmorillonit memiliki ukuran partikel berskala nano yaitu 15,3 nm dengan persentase sebesar 6% dan sisanya merupakan partikel yang memiliki ukuran > 100 nm dengan total persentase 94% dengan ukuran masing-masing sebesar 383,9 nm dengan persentase 59% dan 6647,1 nm dengan persentase 35%serta memiliki gugus-gugus fungsional yaitu hidroksil (-OH), Si-O-Si dan Al-Al-OH. Pengujian kualitas minyak jelantah meliputi organoleptik, bilangan asam, bilangan peroksida dan bilangan penyabunan menggunakan Nano-Montmorillonit. Berdasarkan hasil pengujian maka semakin banyak jumlah adsorben Nano-Montmorilonit yang ditambahkan maka bilangan asam, bilangan peroksida, bilangan penyabunan mengalami penurunan serta kualitas aroma dan warna pada minyak jelantah menjadi lebih baik. Berdasarkan analisis tersebut adsorben Nano-Montmorillonit dapat meningkatkan kualitas minyak jelantah.
      PubDate: 2021-09-26
      DOI: 10.22373/ekw.v7i2.9252
      Issue No: Vol. 7, No. 2 (2021)
       
  • Tracking The Source of Antimicrobial Production From House Fly (Musca
           domestica): Right-Wing of Fly Or Gut System' - A Mini-Review

    • Authors: Muhammad Asril, Ika Agus Rini, Indah Oktaviani, Mushaliyah Mushaliyah
      Abstract: Abstract: The house fly (Musca domestica) is a vector of disease-causing bacteria because of its habit of perching and feeding on various substrates of pathogenic bacteria.  His role as a disease carrier contradicts the hadith narrated by Bukhari, which is "If a fly falls into your vessel, drown it and then remove it because one of its wings carries disease and the other is the cure." This hadith indicates the presence of antimicrobial compounds produced from the body of flies. Various research reports show that the truth of this hadith is that there are antimicrobial-producing bacterial symbionts on the wings of flies (left and right) that can kill pathogenic bacteria on one of the wings or both. Antimicrobial compounds are also produced naturally in the digestive tract of flies from the larval stage to adulthood as a response to the body's defense against the presence of pathogenic bacteria in their bodies. The antimicrobial compounds are lysozyme, defensin, cecropin, diptericin, and several antimicrobial peptide compounds. This compound can also be removed mechanically through pressure (the process of immersing the fly's body in water). This shows that the process of drowning aims to extract or release antimicrobial compounds from the digestive tract of flies to neutralize pathogenic bacteria that have mixed in the liquid in specific containers. This review examines various reports related to antimicrobial substances produced in flies and their evidence in this hadith.Abstrak: Lalat rumah (Musca domestica) merupakan vektor pembawa bakteri penyebab penyakit karena kebiasaan hinggap dan makan pada berbagai substrat bakteri patogen. Perannya sebagai pembawa penyakit memiliki kontradiksi dengan hadist yang diriwayatkan oleh Bukhari yaitu “Jika seekor lalat jatuh ke bejana kamu, tenggelamkanlah kemudian singkirkan, karena salah satu sayapnya membawa penyakit dan sayap lainnya adalah obatnya”. Hadist ini mengindikasikan adanya senyawa antimikroba yang dihasilkan dari tubuh lalat. Berbagai laporan penelitian menunjukkan bahwa kebenaran hadist ini yaitu pada sayap lalat (kiri dan kanan) terdapat bakteri simbion penghasil antimikrob yang mampu membunuh bakteri patogen pada salah satu sayap atau keduanya. Senyawa antimikrob juga dihasilkan secara alami dalam pencernaan lalat sejak tahap larva hingga dewasa sebagai respon pertahanan tubuh terhadap keberadaan bakteri patogen ditubuhnya. Senyawa antimikrob tersebut berupa lisozim, defensin, cecrofin, diptericin dan beberapa senyawa peptida antimikrob. Senyawa ini juga dapat dikeluarkan secara mekanik melalui tekanan (proses penenggelaman tubuh lalat dalam air). Hal ini menunjukkan bahwa proses penenggelaman lalat kedalam air bertujuan untuk mengekstrak atau mengeluarkan senyawa antimikrob dari pencernaan lalat untuk menetralisir bakteri patogen yang telah bercampur dalam cairan di wadah tertentu. Review ini bertujuan untuk mengkaji berbagai laporan terkait senyawa antimikrob yang dihasilkan pada tubuh lalat dan pembuktiannya pada hadist tersebut.
      PubDate: 2021-09-25
      DOI: 10.22373/ekw.v7i2.9495
      Issue No: Vol. 7, No. 2 (2021)
       
  • Perception Analysis of Green Construction Implementation on Construction
           Projects For Contractors in Banda Aceh City

    • Authors: Anita Rauzana, Nurul Hidayati Binti Saidan, Wira Dharma
      Abstract: Abstract: Along with the increasing use of natural resources, and the large number of construction waste dumping in the environment, environmental damage is increasingly visible. Many areas, especially Banda Aceh City, have experienced land and air degradation due to the pattern of life and the number of people. Currently, the construction project has a new concept, namely green construction, which is believed to improve the environment caused by various developments by reducing the occurrence of environmental damage. The research objective was to analyze the perception of the application of green construction in construction projects in the city of Banda Aceh in determining the most dominant factors and the relationship between the factors of implementing green construction (X) on costs (Y). The research location was in the city of Banda Aceh. Secondary data, namely contractor company data. Primary data were 34 questionnaires. The results of data analysis using SPSS include a validity test, reliability test, frequency analysis, and Pearson product-moment correlation test. Based on the research results, it was found that the most dominant green construction factor was the application of energy conservation in construction (X5) of 95.1%, the application of energy conservation (X10) of 92.8%, and the use of construction materials (X8) of 92.5%. The largest correlation coefficient value was obtained in energy conservation (X10) of 0.882.Abstrak: Seiring meningkatnya pemakaian sumber daya alam dan banyaknya pembuangan limbah konstruksi di lingkungan, kerusakan lingkungan semakin terlihat. Telah banyak daerah-daerah khususnya Kota Banda Aceh mengalami degradasi lahan dan udara karena pola hidup dan jumlah manusia. Saat ini proyek konstruksi mempunyai sebuah konsep baru yaitu green construction yang dipercaya mampu memperbaiki lingkungan yang diakibatkan oleh berbagai pembangunan dengan mereduksi terjadinya kerusakan lingkungan. Tujuan penelitian untuk menganalisis persepsi penerapan green construction pada proyek konstruksi di Kota Banda Aceh dalam menentukan faktor-faktor yang paling dominan dan hubungan antara faktor-faktor penerapan green construction (X) terhadap biaya (Y). Lokasi penelitian di Kota Banda Aceh. Data sekunder yaitu data perusahaan kontraktor. Data primer sebanyak 34 kuesioner. Hasil analisis data menggunakan SPSS meliputi uji validitas, uji reliabilitas, analisis frekuensi, dan uji korelasi pearson product moment. Berdasarkan hasil penelitian, diperoleh bahwa faktor green construction  yang paling dominan adalah penerapan konservasi energi pada pelaksanaan konstruksi (X5) sebesar 95,1%, penerapan konservasi energi (X10) sebesar 92,8%, dan penggunaan material konstruksi (X8) sebesar 92,5%. Nilai koefisien korelasi terbesar didapat pada konservasi energi (X10) sebesar 0,882.
      PubDate: 2021-09-25
      DOI: 10.22373/ekw.v7i2.7477
      Issue No: Vol. 7, No. 2 (2021)
       
  • Preparation and Characterization of Giant Tiger Shrimp (Penaeus monodon)
           Shell-Based Chitin as Biocoagulant for Water Purification

    • Authors: Khairun Nisah, Rizna Rahmi
      Abstract: Abstract: Giant tiger shrimp (Penaeus monodon) shells are solid waste that can be utilized for water purification by converting them into chitin-based biocoagulant. The extraction and deproteination of giant tiger shrimp shells (Penaeus monodon) resulted in 83.34% w/w, followed by a demineralization yield of 91.61% w/w product. Chitin extract was used as a biocoagulant using the Jar test method on a fixed variable of 1 L well water and the independent variables of chitin weight (mg) and stirring speed (rpm). The results showed that 15 mg/L chitin reduced the turbidity value of well water from 3.08-1.03 NTU and decreased the Total Dissolved Solids (TDS) from 555-500 mg/L, at 200 rpm and pH 8.4. In conclusion, our investigation proves that chitin derived from giant tiger shrimp shells can be used as a biocoagulant for water purification.Abstrak: Kulit udang merupakan limbah padat yang dapat digunakan untuk penjerniahan air, dengan mengonversi limbah tersebut menjadi biokoagulan berbasis chitin. Limbah kulit udang Windu (Penaeus monodon) diekstrak menjadi chitin sebagai bahan baku Biokoagulan dalam penjernihan air sumur. Proses ekstraksi kulit udang windu (Penaeus monodon) diperoleh rendemen sebesar 83,34% melalui proses deproteinasi, diperoleh rendemen sebanyak 91,61% melalui proses demineralisasi. Hasil ekstrak chitin digunakankan sebagai biokoagulan dengan metode Jar test pada variabel tetap sebesar 1 L air sumur dan variabel berubah adalah massa chitin dan waktu pengadukan. Hasil penelitian menunjukkan bahwa 15 mgram/L chitin mampu  menurunkan nilai kekeruhan air sumur dari 3,08-1,03 (NTU) dan menurunkan Total Dissolved Solids TDS  dari 555-500 (mgram/L), dengan kecepatan rotasi 200 rpm untuk nilai pH 8,4. Kesimpulan, penelitian ini menunjukkan bahwa chitin yang diperoleh dari kulit udang windu dapat digunakan sebagai biokoagulan pada proses penjernihan air.
      PubDate: 2021-07-23
      DOI: 10.22373/ekw.v7i2.8229
      Issue No: Vol. 7, No. 2 (2021)
       
 
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