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All Journal BERKALA SAINSTEK Jurnal Anak Bangsa
Amiyati, Dewi Rara
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Education Mathematics Physics

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Pengaruh Variasi Waktu Penguapan Terhadap Kinerja Membran Selulosa Asetat pada Proses Ultrafiltrasi Amiyati, Dewi Rara; Indarti, Dwi; Muflihah, Yeni Maulidah
BERKALA SAINSTEK Vol 5 No 1 (2017)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v5i1.5368

Abstract

Penelitian ini mempelajari pengaruh variasi waktu penguapan terhadap kinerja membran selulosa asetat. Pada proses ultrafiltrasi, selulosa asetat dibuat dengan menambahkan polietilen glikol (PEG) sebagai agen pembentuk pori membran dan meningkatkan nilai fluks membran. Pembuatan membran selulosa asetat dilakukan dengan metode inversi fasa. Variasi waktu penguapan yang digunakan selama 0, 1, 3, dan 5 menit. Membran selulosa asetat yang terbentuk dikarakterisasi meliputi uji porositas, fluks dan rejeksi. Hasil penelitian menunjukkan waktu penguapan selama 5 menit menghasilkan membran yang lebih rapat. Hasil pengukuran porositas, fluks dan rejeksi terhadap dekstran 500 kDa berturut-turut sebagai berikut: 53,35%; 4,078 (L/jam.m2) dan 92,917%. Kata Kunci: Porositas, Selulosa Asetat,Waktu Penguapan.
PERSEPSI ORANGTUA TERHADAP PENTINGNYA PERKEMBANGAN KOGNITIF ANAK USIA DINI PADA KELOMPOK BERMAIN KASIH BUNDA Amiyati, Dewi Rara; Mutaqin, Moh. Fikri Tanzil; Risna, Inten
Jurnal Anak Bangsa Vol. 3 No. 2 (2024): Jurnal Anak Bangsa
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/jas.v3i2.65

Abstract

This research aims to determine parents' perceptions of the importance of early childhood cognitive development in the Mother's Love Play Group in increasing parents' awareness of the importance of early childhood cognitive development. The research method used is qualitative with a case study approach, involving interviews, observation and documentation to collect data. The main findings show that the perceptions of parents in the Kasih Bunda play group regarding the cognitive development of early childhood vary. Parents act as partners with teachers by repeating material taught at school and teaching values such as respect and religious knowledge. They also act as guardians by upholding justice, teaching responsibility, and forgiveness. As friends, parents accompany children when studying and eating, creating a comfortable environment for communication. As facilitators, parents fulfill their children's school needs such as study desks and stationery, which supports cognitive development. Parents in this group show great concern for their children's cognitive development, trying to provide the support and facilities necessary for their children's education so that they become individuals with good character and benefit society. However, factors such as limited parental time, heredity, environment, interests and talents and freedom. Suggestions for deepening knowledge about early childhood education, because this period is the ideal time to provide stimulation that supports optimal child development
Co-Authors Dwi Indarti Inten Risna Mutaqin, Moh. Fikri Tanzil Yeni Maulidah Muflihah