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  Subjects -> SCIENCES: COMPREHENSIVE WORKS (Total: 374 journals)
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Jurnal Teknosains
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2089-6131 - ISSN (Online) 2443-1311
Published by Universitas Gadjah Mada Homepage  [48 journals]
  • OPTIMIZATION OF CHITINASE PRODUCTION FROM Bacillus cereus SMG 1.1 USING
           RESPONSE SURFACE METHODOLOGY

    • Authors: Adnan Widodo, Indun Dewi Puspita, Ustadi Ustadi
      Abstract: Shrimp shell waste are potential to be processed further into value added products, such as N-acetylglucosamine (GlcNAc). In the production of GlcNAc, biological approach is preferred and environmentally friendly to chemical treatment. Chitinase is an enzyme that plays a vital role in bioprocessing of shrimp shell waste into GlcNAc. Previously, Bacillus cereus SMG 1.1 was isolated from fermented shrimp paste (terasi) and showed ability to produce chitinase. This study was designed to determine the optimum medium for the production of chitinase from B. cereus SMG 1.1 through the Response Surface Method (RSM) using a factorial design with 15 treatments. The test was designed to assess the effect of the independent variables on chitinase activity (colloidal chitin, fructose, and MgSO4). This study developed a linear model capable of predicting the response. The highest response value was achieved at a concentration of 0.75% fructose, 1.5% colloidal chitin, and 0.075% MgSO4 resulted in chitinase activity of 0.0016 U/ml.
      PubDate: 2022-08-04
      DOI: 10.22146/teknosains.72606
      Issue No: Vol. 12, No. 1 (2022)
       
  • Efisiensi termal dan efektivitas produksi kondensor pada solar still
           terpadu

    • Authors: Dan Mugisidi, Adittia Fajar, Rifky Rifky, Oktarina Heriyani
      Abstract: Air adalah kebutuhan pokok manusia yang harus tercukupi. Kebutuhan air bersih  meningkat sedangkan ketersediaan air bersih  terbatas sehingga para peneliti berupaya menggunakan air laut sebagai bahan baku air tawar. Air laut merupakan sumber air yang melimpah akan tetapi masih mengandung garam, oleh karena itu perlu pemisahan antara air laut dengan kandungan garamnya sehingga bisa menghasilkan air tawar atau desalinasi yang salah satu caranya  adalah menggunakan solar still karena murah dan sederhana. Akan tetapi solar still memiliki produktivitas yang rendah, maka itu berbagai penelitian telah dilakukan untuk meningkatkan hasil desalinasi salah satunya dengan penambahan kondensor. Tujuan dari penelitian ini untuk mengetahui efisiensi termal dan efektivitas  kondensor pada solar still. Penelitian dilakukan di Fakultas Teknik, Universitas Muhammadiyah Prof. Dr. HAMKA periode Maret - Mei 2021. Material yang digunakan yaitu aluminium dengan panjang 300 mm, lebar 300 mm dan tebal 1,6 mm untuk pelat basin, kaca ganda dengan tebal 3 mm untuk penutup atas dan samping solar still. Penelitian dilakukan dalam ruangan dengan intensitas radiasi menggunakan lampu halogen. Varibel yang diukur berupa temperatur air, evaporasi, permukaan kaca dalam, kondensor, saluran masuk dan keluar pendingin kondensor dengan menggunakan fluke meter, intensitas radiasi menggunakan solar power meter dan air hasil desalinasi dengan neraca digital. Dari hasil penelitian menunjukan rata-rata efisiensi termal kondensor pada solar still terpadu mencapai 83,94% dan massa desalinasi air laut mencapai 451,32 gram dengan efektivitas produksi kondensor sebesar 96,4% serta nilai korelasi 0,99.
      PubDate: 2022-08-02
      DOI: 10.22146/teknosains.70731
      Issue No: Vol. 12, No. 1 (2022)
       
  • Organizational Internal and External Resources as Drivers of Success in
           Product Development: A Conceptual Model

    • Authors: Trifandi Lasalewo, Budi Hartono, Subagyo Subagyo, Hari Agung Yuniarto
      Abstract: Successful products are those that can meet customer needs, wants, and expectations. The ability of an organization to produce successful products is strongly influenced by the availability of its internal and external resources. This study manages to build a conceptual model that describes the influence of organizational internal and external resources on product success. The four internal resources that drive successful products include product characteristics, management & organizational characteristics, innovation, and knowledge sharing, while one external resource includes marketplace characteristics. The conceptual model can be used as one of the basic references for measuring the driving aspects of the success of product development in subsequent studies.
      PubDate: 2022-08-02
      DOI: 10.22146/teknosains.66241
      Issue No: Vol. 12, No. 1 (2022)
       
  • Analisis potensi penerapan teknologi produksi bersih pada c-maxi
           alloycast, Yogyakarta

    • Authors: Dewi Masri, Wagiman Wagiman, Bertha Maya Sopha
      Abstract: Penerapan produksi bersih di C-Maxi Alloycast, Yogyakarta. Tujuan penelitian adalah untuk mengidentifikasi potensi penerapan prinsip produksi bersih di C-Maxi Alloycast. Metode yang digunakan adalah pemetaan proses produksi, analisis limbah melalui pengujian limbah cair & analisis potensi prinsip-prinsip produksi bersih. Hasil yang diperoleh untuk proses produksi meliputi peleburan, penuangan logam cair ke cetakan, pengangkatan cetakan dan pemberian cairan pendingin, pengangkatan hasil coran, pembubutan, pengikiran, quality control, penyimpanan dan distribusi. Karakteristik limbah cair menunjukkan nilai memenuhi baku mutu, namun kandungan TSS tidak memenuhi NAB (Nilai Ambang Batas). Peluang produksi bersih antara lain good housekeeping, penerapan 3R pada limbah padat, pembangunan TPS Limbah B3 dan peningkatan kapasitas sumber daya manusia. Kinerja lingkungan mengalami peningkatan berdasarkan Standar Industri Hijau (SIH) dari level 1 ke level 2 dengan nilai 53% menjadi 65% dengan penerapan produksi bersih. Kinerja ekonomi dari penerapan produksi bersih memperoleh keuntungan sebesar Rp. 77.412.000,-/tahun. Menerapkan produksi bersih dapat memberikan dampak positif bagi lingkungan dan perekonomian.
      PubDate: 2022-08-02
      DOI: 10.22146/teknosains.67962
      Issue No: Vol. 12, No. 1 (2022)
       
  • Dampak pembangunan yogyakarta international airport terhadap perubahan
           fisik dan nilai lahan di daerah rawan bencana tsunami dengan dukungan
           sistem informasi geografis

    • Authors: Ilham satria
      Abstract: The construction of a new airport in tsunami disaster prone area in Kulon Progo Regency has been impacting in land use and land value. The changes in land use will impact on changing tsunami hazard model. This research aims to analyze the impact of a new airport on physical changes and land value changes in Temon District with geographic information system. The research begins with inventory of spatial data from various agencies. Multi-temporal image interpretation is resulted in 2015 and 2020 land use maps. Physical changes and tsunami models analysis were carried out using spatial analysis in ArcGIS. The making land value change maps using 2015 and 2021 land value zone maps. The analysis effect of new airports and tsunami hazard using multiple linear regression. Data validation was carried out by sampling techniques and field surveys. The results of spatial analysis is physical growth from 2015-2020 covering an area 418019 m² and loss of a built area 149261 m². The changes in the tsunami model from 2015-2020 increased by 118740 m². The changes in land value from 2015-2021 is increasing the average value of Rp. 1317088/ meter² or 652%. The conclusion from multiple linear regression analysis results and community interview is existence of airport very influencial on increasing land value compared to the effect of tsunami hazard.
      PubDate: 2022-08-01
      DOI: 10.22146/teknosains.72609
      Issue No: Vol. 12, No. 1 (2022)
       
 
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