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All Journal JURNAL PENDIDIKAN TAMBUSAI Jurnal Serambi Biologi
Summaiati, Titi
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Social Sciences

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Variations in Alginate Concentration as a Material for Immobilizing Thermophilic Bacteria on the Characteristics of Beads Summaiati, Titi; Irdawati, Irdawati
Jurnal Serambi Biologi Vol. 9 No. 2 (2024): Jurnal Serambi Biologi
Publisher : Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/srmb.v9i2.346

Abstract

Immobilization is a technique for physically confining or placing microbial cells in a certain space, where the cells still maintain catalytic activity. The cell immobilization technique aims to facilitate product purification, increase productivity, make it easier to control cell stability and microbial cells can be used repeatedly. One carrier that is often used as a matrix to trap microorganism cells is alginate. Alginate is a type of polysaccharide obtained through extraction from brown algae. The immobilization technique with aginate cells was chosen because of its non-toxic nature, simple procedure for immobilization and cheap price for industrial applications. Alginate concentration affects the physical and chemical properties of the beads produced, such as size, shape and color of the beads. This study aims to compare variations in alginate concentration as a material for immobilizing thermophilic bacteria on the characteristics of the beads. This research is descriptive research. Beads are made with varying concentrations, namely 2%, 3%, 4%, 5% and 6% alginate. Data in the form of beads characteristics which include size, shape and color of beads. Based on research, the results obtained are that the higher the alginate concentration, the larger the diameter of the beads, the color of the beads will be more intense and the shape of the beads will tend to be round, and the beads will be sturdier, and vice versa.
Analisis Vegetasi Gulma pada Perkebunan Singkong (Manihot esculenta) di Kecamatan Koto Tangah Kota Padang Berkat, Berkat; Summaiati, Titi; Puspita Putri, Dwi; Lesmina, Fadilla
Jurnal Pendidikan Tambusai Vol. 9 No. 1 (2025)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v9i1.25294

Abstract

Tanaman singkong (Manihot esculenta Crantz) merupakan salah satu tanaman pangan yang banyak mengandung karbohidrat dan dapat tumbuh diberbagai tempat. Pertumbuhan dan perkembangan singkong dapat dipengaruhi oleh beberapa faktor salah satunya gulma. Hal ini dikarenakan adanya kompetisi antara gulma dan tanaman untuk memperebutkan cahaya, air, unsur hara dan ruang untuk tumbuh. Oleh karena itu dilakukan penelitian yang bertujuan untuk mengetahui jenis vegetasi gulma pada Perkebunan Singkong (Manihot esculenta) di Kecamatan Koto Tangah, Kota Padang, Sumatera Barat. Penelitian ini bersifat deskriptif yang dilakukan pada bulan November 2022, menggunakan metode kuadrat dengan plot ukuran 1x1 m sebanyak 10 plot. Teknik analisis keanekaragaman menggunakan indeks Shannon Wiener dan analisis pola penyebaran menggunakan indeks Morisita. Berdasarkan penelitian didapatkan sebanyak 14 spesies gulma, dengan gulma yang mendominasi adalah Ageratum conyzoides, dengan nilai INP sebesar 50,95%. Sedangkan nilai INP terendah dimiliki oleh Oxalis barrelieri yaitu sebesar 0,84%. Nilai indeks keanekaragaman gulma tergolong sedang yaitu 1,95, dengan indeks pola penyebaran tergolong berkelompok yaitu 2,036.
Co-Authors Berkat, Berkat Irdawati Irdawati Lesmina, Fadilla Puspita Putri, Dwi