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Model Kesetimbangan Adsorpsi Doxorubicin Pada Hidroksiapatit Muhammad Hamdani; Ahmad Fadli; Fajril Akbar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Hydroxyapatite has been applied in the biomedical field as drug delivery. The drug will be absorbed onto the hydroxyapatite surface through the adsorption process. The purpose of this study was to determine the effect of initial concentration of doxorubicin (DOX) and the operating temperature on hydroxyapatite adsorption, and to determine the appropriate adsorption equilibrium model. Research began by making a solution of doxorubicin with an initial concentration of 485.83; 661.67; 884.17 mg/L. A 5 mL DOX solution was mixed with 10 mg hydroxyapatite in a beaker glass, then stirred using a magnetic stirrer at 220 rpm at 30, 40, 50 °C for 18 hours. After centrifugation, the concentration of DOX solution in the liquid was tested using UV-Vis spektofotometry. The results showed that the adsorption capacity () increased with increasing initial concentration () DOX. The value of () increased consecutively from 223.86-430.18; 231.59-434.46; 230.48-432.04 mg/g with increasing ofvalue from 485.83-884.17 mg/L at temperature of 30, 40, 50 °C. The highest value of () was obtained at 40 °C, i.e., 231.59-434.46 mg/g. It was found that the Langmuir was an appropriate equilibrium model, where the maximum adsorption capacity () values for each temperature 30, 40, 50 °C are 151.52; 163.93; 181.82 mg/g.Keywords: adsorption, doxorubicin, equilibrium model, hydroxyapatite.

The Relationship of Self-Concept and Learning Style with Mathematics Learning Outcomes of Students of Class VII MTSN 2 of Palangka Raya Muhammad Hamdani; Orbit Thomas; Simpun Simpun; Rosha Safrina
Budapest International Research and Critics in Linguistics and Education (BirLE) Journal Vol 5, No 2 (2022): Budapest International Research and Critics in Linguistics and Education, May
Publisher : BIRCU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birle.v5i2.5148

The aims of knowing: 1) The relationship between self-concept and mathematics learning outcomes of grade VII MTsN 2 Palangka Raya students based on visual learning styles. 2) The relationship between self-concept and mathematics learning outcomes for grade VII MTsN 2 Palangka Raya students based on auditory learning styles. 3) The relationship between self-concept and mathematics learning outcomes for grade VII students of MTsN 2 Palangka Raya City based on kinesthetic learning styles. This study uses a quantitative approach to the type of correlational research. This research was conducted in the odd semester of the 2020/2021 academic year. Based on the results of the self-concept questionnaire test results obtained 20 valid statements with a reliability coefficient of️11 = 0.84, and for the test of mathematics learning outcomes obtained 27 valid questions with a reliability coefficient️11 = 0.87. Prerequisite test results of parametric statistical analysis for normality test based on visual learning style, self-concept data obtained️2count = 31.99 > 9.49=️2tables and data on mathematics learning outcomes️2count = 13.07 > 11.07 =️2table with dk = i – 3 = 8 – 3 = 5 and a significant level of 5% which means that all data are not normally distributed. For the normality test based on the auditory learning style, self-concept data were obtained️2count = 9.21 > 7.81=️2tables and data on mathematics learning outcomes️2count = 2.76 < 7.81 =️2table with dk = i – 3 = 6 – 3 = 3 and a significant level of 5%, which means that self-concept data is not normally distributed and data on mathematics learning outcomes is normally distributed. Meanwhile, for the normality test based on kinesthetic learning styles, self-concept data were obtained️2count = 27.29 > 9.49=️2tables and data on mathematics learning outcomes️2count = 1.13 < 5.99 =️2table with dk = i – 3 = 5 – 3 = 2 and a significant level of 5%, which means that the concept data is not normally distributed and the data on mathematics learning outcomes is normally distributed. The results of the study show that: (1) there is a significant positive relationship between self-concept and students' mathematics learning outcomes based on visual learning styles, the correlation coefficient is = 0.174; (2) self-concept with students' mathematics learning outcomes based on auditory learning style, the correlation coefficient is = 0.390; (3) there is a significant positive relationship between self-concept and students' mathematics learning outcomes based on kinesthetic learning styles, the correlation coefficient is = 0.549.

ANALISIS ZONA KARAKTER EKOLOGIS DAN ELEMEN PENYUSUN LANDSKAP DI KAWASAN PARIWISATA GEOHERITAGE LEMBAH HARAU KABUPATEN LIMA PULUH KOTA Muhammad Hamdani; Ernawati ernawati
JURNAL BUANA Vol 6 No 3 (2022): Edisi Sistem Informasi Geografi
Publisher : JURUSAN GEOGRAFI FIS UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/student.v6i3.2161

This study aims to analyze the ecological character and elements of the landscape in the Harau Valley Geoheritage tourism area, Lima Puluh Kota Regency. Types of quantitative descriptive research in the form of research with methods or case studies. Data were analyzed using ovaly technique with ArcGIS application and literature study. The results of the study found that the ecological zone in the Harau Valley Geoheritage area is divided into three ecological zones, namely a low ecological zone, a medium ecological zone, and a high ecological zone. The Geoheritage of the Harau Valley is in a zone dominated by a moderate ecological zone, which is 131.48 km2 or as much as 43% of the total area of Harau District, where management in this area must be based on nature conservation to anticipate natural damage/disasters. Based on the results of landscape identification, the constituent elements of the Harau Valley Geoheritage area have natural features such as forests, waterfalls, hills, and cliffs. Meanwhile, the artificial features in the Harau Valley Geoheritage area are settlements, plantations, and agriculture. The character of the landscape in the Harau Valley Geoheritage area is dominated by natural features. Keywords: Geoheritage, Harau Valley, Ecological Zone

Peran Budaya Organisasi dan Motivasi Pegawai dengan Kepemimpinan sebagai Intervening (Studi pada Kantor Dinas Informatika, Komunikasi, dan Statistik, Provinsi Riau) Muhammad Hamdani
Jurnal Manajemen dan Bisnis Terapan Vol. 3 No. 1 (2021): JURNAL MANAJEMEN DAN BISNIS TERAPAN
Publisher : Sekolah Pascasarjana Universitas Lancang Kuning

Penelitian ini dilaksanakan pada Dinas Komunikasi, Informatika dan Statistik Provinsi Riau dengan tujuan mengkaji peran budaya organisasi dan motivasi pegawai dengan kepemimpinan sebagai intervening. Populasi penelitian ini adalah semua pegawai pada Dinas Komunikasi, Informatika dan Statistik Provinsi Riau yang berjumlah 95. Namun dikurangi dengan peneliti sehingga total sampel adalah 94 orang. Penelitian ini akan menggunakan sampel jenuh yaitu seluruh populasi dijadikan sebagai sampel. Analisa data penelitian ini menggunakan statistik deskriptif dan analisis verifikatif, sebagai alat analisis digunakan Sctruktural Equational Model yang diproses dengan Software SmartPLS2. Hasil analisis membuktikan bahwa pada Dinas Komunikasi, Informatika dan Statistik Provinsi Riau, budaya organisasi mempengaruhi motivasi pegawai, kepemimpinan mempengaruhi motivasi pegawai dan Kepemimpinan mampu memediasi pengaruh budaya organisasi terhadap motivasi pegawai.

ANALISIS ZONA KARAKTER EKOLOGIS DAN ELEMEN PENYUSUN LANDSKAP DI KAWASAN PARIWISATA GEOHERITAGE LEMBAH HARAU KABUPATEN LIMA PULUH KOTA Muhammad Hamdani; Ernawati ernawati
JURNAL BUANA Vol 6 No 3 (2022): Edisi Sistem Informasi Geografi
Publisher : JURUSAN GEOGRAFI FIS UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/student.v6i3.2161

This study aims to analyze the ecological character and elements of the landscape in the Harau Valley Geoheritage tourism area, Lima Puluh Kota Regency. Types of quantitative descriptive research in the form of research with methods or case studies. Data were analyzed using ovaly technique with ArcGIS application and literature study. The results of the study found that the ecological zone in the Harau Valley Geoheritage area is divided into three ecological zones, namely a low ecological zone, a medium ecological zone, and a high ecological zone. The Geoheritage of the Harau Valley is in a zone dominated by a moderate ecological zone, which is 131.48 km2 or as much as 43% of the total area of Harau District, where management in this area must be based on nature conservation to anticipate natural damage/disasters. Based on the results of landscape identification, the constituent elements of the Harau Valley Geoheritage area have natural features such as forests, waterfalls, hills, and cliffs. Meanwhile, the artificial features in the Harau Valley Geoheritage area are settlements, plantations, and agriculture. The character of the landscape in the Harau Valley Geoheritage area is dominated by natural features. Keywords: Geoheritage, Harau Valley, Ecological Zone

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