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All Journal Dentika Dental Journal Journal of Biology Education Global Financial Accounting Journal
Tiffany, Tiffany
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Biochemistry, Genetics & Molecular Biology Dentistry Economics, Econometrics & Finance Education

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PENGARUH PENAMBAHAN SERAT KACA TERHADAP KEKASARAN PERMUKAAN DAN PENYERAPAN AIR BAHAN BASIS GIGI TIRUAN NILON TERMOPLASTIK Ariyani, Ariyani; Tiffany, Tiffany
Dentika: Dental Journal Vol. 19 No. 1 (2016): Dentika Dental Journal
Publisher : TALENTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (214.322 KB) | DOI: 10.32734/dentika.v19i1.156

Abstract

Penggunaan bahan nilon termoplastik sebagai bahan basis gigi tiruan berkembang pada masa sekarang ini, namun disamping kelebihannya dalam hal estetis, bahan basis gigi tiruan nilon termoplastik juga memiliki kekurangan yaitu stabilitas warna yang rendah, sulit dipoles sehingga menghasilkan permukaan yang lebih kasar dan penyerapan air yang tinggi. Salah satu metode untuk mengurangi penyerapan air adalah dengan menambahkan serat kaca pada bahan basis gigi tiruan. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan serat kaca terhadap kekasaran permukaan dan penyerapan air bahan basis gigi tiruan nilon termoplastik tanpa dan dengan penambahan serat kaca. Jenis penelitian ini adalah eksperimental laboratoris. Sampel pada penelitian ini adalah nilon termoplastik berbentuk silindris berukuran diameter 15 ± 1 mm dan ketebalan 0,5 ± 0,1 mm. Jumlah seluruh sampel adalah 32 dengan 8 sampel untuk setiap kelompok. Sampel tersebut di uji nilai kekasaran permukaan dan penyerapan air. Analisis statistik menggunakan uji ANOVA satu arah dan LSD menunjukkan terdapat perbedaan signifikan terhadap kekasaran permukaan dengan nilai p = 0,0001 (p < 0,05) dan terhadap penyerapan air p = 0,001 (p < 0,05). Sebagai kesimpulan, penambahan serat kaca 0,5%, 1%, dan 1,5% pada bahan basis gigi tiruan nilon termoplastik dapat menurunkan nilai penyerapan air dan meningkatkan kekasaran permukaan bahan basis gigi tiruan nilon termoplastik.
Analisis Pengaruh Karakteristik Bank terhadap Profitabilitas Bank pada Perusahaan yang Terdaftar di Bursa Efek Indonesia Serly, Serly; Tiffany, Tiffany
Global Financial Accounting Journal Vol 3 No 2 (2019)
Publisher : Faculty of Economics, Universitas Internasional Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (402.81 KB)

Abstract

This research has a purpose to analyze the effect of bank characteristics on bank profitability in company listed on Indonesia Stock Exchange. Return on assets, return on equity, and net interest margin as the proxy of profitability as the dependent variable. The independent variables are non-performing loans, loan loss provision, inflation rate, deposits, interest margin, bank size, capital ratio, and loans. The sample processed in this research are bank company listed in Indonesia Stock Exchange within 2013-2017. The data is processed by a statistic software with panel regression method to be analyzed. The result shows that non-performing loans, loan loss provision, inflation rate, deposits, bank size, and loans had no significant effect on return on assets. In contrast, interest margin had a significant negative effect on return on assets. Non-performing loans, capital ratio, and loans had significant positive effect on return on equity, whereas loan loss provision and deposits had significant positive effect on return on equity. But inflation rate, interest margin, and bank size had no significant effect on return on equity. Non-performing loans, capital ratio, and loans had significant positive effect on net interest margin, whereas loan loss provision and deposits had significant positive effect on net interest margin. But inflation rate, interest margin, and bank size had no significant effect on net interest margin.
Development of Envirokal Booklet Media Based Problem Solving Material Environment Pollution Tiffany, Tiffany; Pribadi, Tyas Agung; Tri Martuti, Nana Kariada
Journal of Biology Education Vol 7 No 1 (2018): April 2018
Publisher : FMIPA UNNES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbe.v7i1.21939

Abstract

The aim of the research is to know the worthiness and the effectiveness of Envirokal (Environment of Pekalongan) booklet with problem-solving method in the lesson of environmental pollution against student’s learning outcome. The research is done at Senior High School 3 Pekalongan with a Research and Development (R&D) design, with 10 steps of research starting from the needs assessment, until obtaining the final product, i.e. booklet. The assessment done by the experts shows that the Envirokal Booklet obtained high scores as and it was concluded that the Envirokal Booklet was very effective to be used as learning material and could increase the individual score and classical completeness.
Co-Authors Ariyani, Ariyani Nana Kariada Trimartuti Serly, Serly Tyas Agung Pribadi, Tyas Agung