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All Journal Journal of Degraded and Mining Lands Management Triadik Indonesian Journal of Cosmetics
Saputra, Iwan
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Economics, Econometrics & Finance Education Industrial & Manufacturing Engineering Mathematics Medicine & Pharmacology Physics Social Sciences Other

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“GURU PEREMPUAN LEBIH KOMUNIKATIF”: PENGALAMAN SISWA BELAJAR OLAHRAGA DENGAN GURU LAKI-LAKI DAN PEREMPUAN Fadli, Zen; Saputra, Iwan; Samosir, Agus Salim; Sembiring, Heri Masmur
TRIADIK Vol. 20 No. 2: OKTOBER 2021
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/triadik.v20i2.20500

Abstract

Penelitian ini bertujuan untuk mengetahui perbedaan kapasitas dan kualitas mengajar guru laki-laki dan perempuan dalam pembelajaran olahraga menurut kriteria dan pengukuran kualitas guru di SMA Negeri 13 Medan. Sampel penelitian ini adalah 15 siswa SMA Negeri 13 Medan, 5 siswi perempuan dan 10 siswa laki-laki. Metode yang digunakan adalah kualitatif dengan survey dan wawancara. Setiap responden ditanyai mengenai tanggapan serta nilai yang mereka berikan untuk setiap indikator yang menjadi tolak ukur kualitas pengajaran guru olahraga. Hasil penelitian menunjukan bahwa adanya perbedaan signifikan dari tingkat kompetensi mengajar guru olahraga laki-laki dan perempuan, baik secara totalitas maupun diukur pada setiap indikator.  Pada indikator kompetensi kepribadian, guru olahraga perempuan mendapat 46.7% dalam kriteria baik, dan guru olahraga laki-laki mendapat 33.3% dalam kriteria baik. Kemudian, dalam kompetensi pedagogik guru olahraga perempuan mendapat 53.4% dalam kriteria baik, dan guru olahraga laki-laki mendapat 40% dalam kriteria baik. Lalu, untuk kompetensi professional, guru olahraga perempuan mendapat 53.4% untuk kriteria baik, dan 46,7% kriteria baik untuk guru olahraga laki-laki. Selanjutnya, guru olahraga perempuan mendapat 60% dalam kriteria baik untuk kompetensi sosial, sementara 33.3% untuk guru olahraga laki-laki. Dapat disimpulkan bahwa terdapat perbedaan kapasitas guru antara guru laki-laki dan guru perempuan pada pembelajaran olahraga di SMAN 13 Medan dalam total kompetensi secara keseluruhan. Guru olahraga laki-laki perlu meningkatkan keterampilan sosialnya terutama dalam hal kerjasama komunikasi dan social engagement dengan siswa. Dan guru olahraga perempuan masih perlu meningkatkan kemampuannya untuk merencanakan pelajaran mengajukan pertanyaan menguah pemelajaran dan menutup tugas
Application of oil palm and cacao waste biochar to improve the chemical properties of an Ultisol of Langsa, Aceh Saputra, Iwan; Prijono, Sugeng; Soemarno, Soemarno; Suntari, Retno
Journal of Degraded and Mining Lands Management Vol. 12 No. 1 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.121.6637

Abstract

Ultisols, including those of Langsa, Aceh, are known to have low fertility due to low pH, low available nutrients, low base saturation, high pH and exchangeable Al, and low cation exchange capacity. These problems can be alleviated by applying organic amendments to the soil. One of the soil amendments is biochar. This study aimed to elucidate the potential of oil palm and cacao waste biochar for improving the chemical properties of an Ultisol of Langsa, Aceh. Biochars generated from oil palm kernel shell (PKS), oil palm empty fruit bunch (PEFB), and cacao pod husk (CPH) were applied to the soil and incubated in the laboratory for 16 weeks. At 4, 8, 12, and 16 weeks after incubation, the changes in soil chemical properties were measured. The results showed that applying different types of biochar significantly improved the chemical properties of the Ultisol of Langsa. Specifically, PEFB biochar caused significant increases in soil pH (H2O and KCl), total phosphorus, available phosphorus, organic C, and cation exchange capacity. These increases became more pronounced with longer incubation times. In addition, using PEFB biochar resulted in the lowest levels of exchangeable Al and Fe in the soil. These levels decreased further with longer incubation times. In general, PEFB biochar produced at a pyrolysis temperature of 450oC for 4 hours is the most effective biochar for improving the chemical properties of the Ultisol of Langsa.
Optimization of Formula and In Vitro Activity Testing of O/W Lotion Cosmetic Formulations Containing Ethanol Extract of Cat's Whiskers Leaves (Orthosiphon aristatus) as Sunscreen Yasir, Angga Saputra; Suryaneta, Suryaneta; Putri, Tikarahayu; Saputra, Iwan; Handayani, Kiki; Zulaicha, Annisaa; Sari, Indah Puspita; Nurhayati, Veni; Sholeha, Aida
Indonesian Journal of Cosmetics Vol 2 No 1 (2024): Indonesian Journal of Cosmetics
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Exposure to ultraviolet (UV) radiation from sunlight can induce erythema, sunburn, and skin sensitivity, culminating in dermal damage. The application of sunscreen mitigates potential skin harm resulting from solar radiation. This investigation aims to ascertain the optimal formulation for lotion preparations incorporating Orthosiphon aristatus leaf extract and evaluate the sunscreen efficacy of said formulations through in vitro testing. Extraction procedures involved ethanol maceration, followed by phytochemical characterization of the resultant extract. Formulation of the extract into oil-in-water (O/W) lotion preparations was executed, with optimization conducted utilizing the Simplex Lattice Design (SLD) method, incorporating varied concentrations of stearic acid, cetyl alcohol, and olive oil to assess their impact on lotion viscosity, spreadability, and adhesion. Subsequent evaluation encompassed in vitro assessment of sunscreen activity for both the lotion and extract. Findings revealed the presence of flavonoids, saponins, and tannins in the extract. Optimal lotion formulation, determined via the SLD method, yielded concentrations of 2.00, 4.22, and 8.78 for stearic acid, cetyl alcohol, and olive oil, respectively. Formulation optimization was guided by minimizing viscosity while maximizing spreadability and adhesion. Confirmation studies underscored the predictive capacity of the SLD method in determining viscosity, spreadability, and adhesion of the cat's whiskers leaf extract lotion. SPF values for the extract and lotion were recorded as 33.63 ± 0.963 and 2.54 ± 0.001, respectively, at a concentration of 30,000 ppm.
Co-Authors Fadli, zen Indah Puspita Sari, Indah Puspita Kiki Handayani Nurhayati, Veni Putri, Tikarahayu Retno Suntari Samosir, Agus Salim Sembiring, Heri Masmur Sholeha, Aida Soemarno Soemarno Sugeng Prijono Suryaneta, Suryaneta Yasir, Angga Saputra Zulaicha, Annisaa