Rizki Amelia
Burapha University, Chonburi, Thailand and Graduate School Trisakti Institute of Tourism, Jakarta, Indonesia

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Kontrasepsi Hormonal Meningkatkan Kadar α-Amylase Saliva Handajani, Juni; Puspita, Rini Maya; Amelia, Rizki
Majalah Kedokteran Gigi Indonesia Vol 21, No 1 (2014)
Publisher : Majalah Kedokteran Gigi Indonesia

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Abstract

Salivary α-amylase atau α-amylase saliva (SAA) adalah salah satu enzim dalam saliva yang berperan penting pada inisiasi digesti karbohidrat dan fungsi interaksi bakteri. Kontrasepsi hormonal sangat populer di Indonesia untuk mencegah kehamilan. Penelitian ini bertujuan untuk mengetahui kadar SAA wanita pemakai kontrasepsi pil dan suntik. Subjek penelitian sebanyak 30 perempuan usia 20-35 tahun. Prosedur penelitian telah mendapat persetujuan dari Komite Etik Fakultas Kedokteran Universitas Gadjah Mada Yogyakarta. Subjek dibagi menjadi 3 kelompok (pemakai kontrasepsi pil, suntik, dan kontrol), masing-masing 10 perempuan. Kriteria subjek antara lain subjek sehat, tidak menggunakan alat ortodontik, protesa atau mahkota, serta menggunakan kontrasepsi hormonal lebih dari 3 bulan. Sampel saliva dikumpulkan pada sore hari (16.00-18.00 WIB) selama 1 menit dengan metode tanpa stimulasi. Kadar tingkat SAA diukur menggunakan ELISA kit (Salimetrics LLC) dengan Optical Density (OD) pada 405 nm. Data dianalisis menggunakan ANOVA (p<0,05). Hasil penelitian menunjukkan kadar SAA tertinggi pada perempuan pemakai kontrasepsi  pil dan ada perbedaan yang signifikan diantara tiga kelompok. Disimpulkan bahwa kontrasepsi hormonal meningkatkan kadar SAA.ABSTRACT: Hormonal Contraceptive Increased The Level of Salivary Α-Amylase. Salivary α-amylase (SAA) is one of the most important enzymes in saliva. This enzyme was mainly involved in the initiation of the digestion of starch in the oral cavity and has significant bacterial interactive function. Hormonal contraceptives are very popular in Indonesia to avoid pregnancy. This study aimed to evaluate the level of SAA in woman who taking pill and by injection contraceptives. Thirty women were in subjects, 20-35 years old, approval ethical clearance from Ethic Committee Medical Faculty of Gadjah Mada University, Yogyakarta Indonesia. Subjects were divided into three groups (taking pill contraceptive, by injection contraceptive and control). Each group consisted ten women. Criteria for issue were medication free, healthy, no orthodontic treatment, no prosthesis or crown and took hormonal contraceptives more than three months. Saliva samples were collected at afternoon (16.00-18.00 pm) for 1 minute using unstimulating method. The level of SAA was measured by ELISA kit (Salimetrics LLC). Optical Density was read on a standard plate at 405 nm. Data for level SAA were analyzed using ANOVA (p<0.05). Results showed the highest level of SAA in woman who takes pill contraceptive, and there were significant differences between the three groups. This study is suggesting that the hormonal contraceptive increased the level of SAA.
MULTIPLIKASI TUNAS TANAMAN INGGU (RUTA ANGUSTIFOLIA (L.) PERS.) SECARA IN VITRO DENGAN PENAMBAHAN BENZYL ADENIN Yenisbar, Yenisbar; Yarni, Yarni; Amelia, Rizki
E-Journal Widya Kesehatan dan Lingkungan Vol. 1 No. 1 (2014)
Publisher : E-Journal Widya Kesehatan dan Lingkungan

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Abstract

Abstrak: Inggu (Ruta angustifolia (L.) Pers.) termasuk tumbuhan obat langka. Metode kultur in vitro merupakan salah satu metode perbanyakan alternatif pada tumbuhan inggu. Tujuan penelitian ini adalah untuk mendapatkan konsentrasi BA terbaik pada multiplikasi tunas tanaman inggu.Eksplan yang digunakan berupa batang 1 ruas (ruas 1-10) dari tanaman inggu.Penelitian ini dilakukan pada bulan Juli sampai Desember 2011 di Laboratorium Botani, Laboratorium Terpadu Universitas Nasional. Media yang digunakan adalah media MS ¾ dengan penambahan ZPT BA dalam beberapa konsentrasi sebagai taraf perlakuan yaitu 1,0; 2,0; 3,0; 4,0 dan 5,0 ppm yang ditambahkan dengan 2,4-D 0,3 ppm, serta lima kali ulangan. Pengolahan data dilakukan dengan menggunakan program SPSS 19 for Windows. Hasil penelitian menunjukan bahwa pemberian kombinasi ZPT BA dengan berbagai konsentrasi + 2,4-D 0,3 ppm dalam media MS ¾ memberikan respon berupa pembentukan dan multiplikasi tunas tanaman inggu. Hasil analisis sidik ragam menunjukkan bahwa pemberian BA dengan konsentrasi BA 1,0; 2,0; 3,0; 4,0 dan 5,0 ppm berpengaruh sama baik terhadap jumlah dan panjang tunas inggu. Kata kunci: inggu, benzyl adenine, multiplikasi. Abstract: Rue (Ruta angustifolia (L.) Pers.) Including rare medicinal plants. Cultured in vitro method is one alternative method of propagation in plants inggu. The study was conducted from July to December 2011 at the Laboratory of Botany, Nasional University Integrated Laboratory. The purpose of this study is to obtain the best BA concentration on shoot multiplication of rue. Explants used in the form of a stem segment (segment 1-10) of the rue plant. The medium used was MS medium with the addition of PGR ¾ BA in some degree of concentration as the treatment is 1.0, 2.0, 3.0; 4.0 and 5.0 ppm of 2,4-D was added to 0.3 ppm, and five replications. Data processing is done by using SPSS 19 for Windows. The results showed that administration of PGR combination of BA with different concentrations of 2,4-D +0.3 ppm in ¾ MS medium responded in the form of plant establishment and shoot multiplication rue. The analysis of variance showed that administration of BA with a concentration of BA 1.0, 2.0, 3.0; 4.0 and 5.0 ppm effect at both the number and length of shoots rue. Key words: rue, benzyl adenine, multiplication.
The Role of Current Ratio, Operating Cash Flow and Inflation Rate in Predicting Financial Distress: Indonesia Stock Exchange Setyawati, Irma; Amelia, Rizki
JDM (Jurnal Dinamika Manajemen) Vol 9, No 2 (2018): September 2018 (DOAJ Indexed)
Publisher : Department of Management, Faculty of Economics, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jdm.v9i2.14195

Abstract

We believe company financial statements can be used as a tool to analyze and also as an indicator to know the financial performance. The financial statements contain information for various financial ratios, which are an important tool for assessing the company’s financial performance in the future. The purpose of this research is to know the role of the current ratio, operating cash flow, and the inflation rate in predicting financial distress of consumer goods industry sector listed in the Indonesia Stock Exchange period 2011–2015. Financial distress prediction models need to be developed to assist managers in overseeing company performance and help identify important trends. To analyze the current ratio, operating cash flow, and the inflation rate has a probability of occurring financial distress for the company, used logistic regression. From this study resulted in the finding that the probability of a company exposed by financial distress is caused by operating cash flow, while the current ratio and the inflation rate have a smaller probability of the company of consumer goods to be exposed by financial distress.
Winner Loser Anomaly in Indonesia Amelia, Rizki; Wijayanto, Andhi
Management Analysis Journal Vol 7 No 2 (2018): Management Analysis Journal
Publisher : Management Analysis Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/maj.v7i2.22988

Abstract

This research examines the market overreaction on the mining companies listed in Indonesia Stock Exchange from 2013 to 2017. The population in this research are all of the mining companies that list in the Indonesia Stock Exchange. The sample are selected according to the criteria of purposive sampling method. Market overreaction are measured by the abnormal return and indicated with ACAR loser portfolio outperformed of ACAR winner portfolio. The result shows that the ACAR loser portfolio doesn’t outperform of ACAR winner portfolio. The significance value of one sample t-test more than 0,05. This research conclude that the overreaction phenomenon on the mining companies in Indonesia Stock Exchange was not found.
Pengembangan E-learning Menggunakan Model Inquiry Terbimbing Berbantuan Aplikasi Edmodo Terhadap Keterampilan Abad 21 Peserta Didik Fahmi, Reza; Aswirna, Prima; Amelia, Rizki; Nurhasnah, Nurhasnah
Natural Science: Jurnal Penelitian Bidang IPA dan Pendidikan IPA Vol 7, No 1 (2021)
Publisher : Universitas Islam Negeri Imam Bonjol Padang

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Abstract

Penelitian ini dilatarbelakangi karena pendidik masih menggunakan model pembelajaran langsung dengan metode ceramah dan sesekali menggunakan media power point yang masih berpusat pada pendidik, dan sedikitnya sumber pembelajaran fisika berbentuk e-learning yang bisa diakses secara luar, kapan saja, dimana saja dan muatan materi yang sangat padat sementara waktu pembelajaran yang diberikan di dalam kelas hanya sedikit. Tujuan penelitian ini adalah: 1) untuk mengembangkan e-learning berbasis inquiry terbimbing berbantuan aplikasi edmodo terhadap keterampilan abad-21 peserta didik 2) untuk menghasilkan e-learning berbasis inquiry terbimbing berbantuan aplikasi edmodo terhadap keterampilan abad-21 peserta didik yang valid, praktis dan efektif. Penelitian ini merupakan penelitian pengembangan dengan pendekatan Research and Development (R&D). Model pengembangan yang digunakan adalah model pengembangan plomp meliputi: 1) Penelitian pendahuluan (Preliminary research), 2) pengembangan prototipe (Development of prototype phase) dan 3) Fase penilaian (Assesment phase). E-learning berbasis inquiry terbimbing berbantuan aplikasi edmodo pada materi suhu dan kalor serta termodinamika sangat valid dengan skor rata-rata 90,44% dengan persentase uji kelayakan isi sebesar 86%, kelayakan media 93,33% dan kelayakan bahasa 92%, dimana praktikalitas oleh pendidik 94,67% dan peserta didik
Winner Loser Anomaly in Indonesia Amelia, Rizki; Wijayanto, Andhi
Management Analysis Journal Vol 7 No 2 (2018): Management Analysis Journal
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/maj.v7i2.22988

Abstract

This research examines the market overreaction on the mining companies listed in Indonesia Stock Exchange from 2013 to 2017. The population in this research are all of the mining companies that list in the Indonesia Stock Exchange. The sample are selected according to the criteria of purposive sampling method. Market overreaction are measured by the abnormal return and indicated with ACAR loser portfolio outperformed of ACAR winner portfolio. The result shows that the ACAR loser portfolio doesn’t outperform of ACAR winner portfolio. The significance value of one sample t-test more than 0,05. This research conclude that the overreaction phenomenon on the mining companies in Indonesia Stock Exchange was not found.