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All Journal Jambura Science of Management JKPK (Jurnal Kimia dan Pendidikan Kimia)
Az Zahra, Dita Aulia
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Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance

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Utilization of Xylanase Enzymes Derived from Cassava in the Eco-Friendly Biobleaching of Pulp Fuadi, Ahmad Muhammad; Az Zahra, Dita Aulia; Farha, Saniya; Kunarfian, Krisna Artur; Dewi, Tiara Nilawati; Susanti, Dwi
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 9, No 1 (2024): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v9i1.84666

Abstract

The demand for paper has been increasing over time, leading to the pulp and paper industry becoming one of the largest contributors to global carbon emissions due to the chlorine-based bleaching process, particularly in Indonesia. An alternative to minimize chlorine usage involves using xylanase enzymes as part of the bleaching sequence. Xylanase can be produced from agricultural waste, including cassava residue, which contains a significant concentration of xylanase, approximately 21.3%. However, it still needs to be utilized in Indonesia. Therefore, this study aims to explore the production of xylanase enzymes from cassava residue and assess its effectiveness in the biobleaching process of pulp. The research methodology includes the production phase of xylanase enzymes by Aspergillus niger, chelating, bleaching sequence, bleaching, kappa number, and chemical saving assay. In the production of xylanase, the study determined that xylanase exhibits optimal activity under specific conditions, notably at a pH of 6 and a temperature of 60°C. Under these parameters, the enzymatic activity reached a level of 0.4986 U/mg protein. During the bleaching sequence, xylanase was used with doses of 0.3, 0.5, 0.7, 0.8, and 1 L/T pulp at 40, 45, 50, 55, 60, 65, and 70°C for 60 minutes. Following this process, bleaching was conducted at 65°C for 70 minutes, extraction at 80°C for 90 minutes, and a second bleaching phase. Subsequently, a kappa number test was performed, revealing the best kappa value at 60°C with a xylanase dose of 0.5 L/T pulp, reducing from an initial kappa number of 9 to 4.04. Additionally, under these conditions and dosage, xylanase enzymes could save approximately 23.67% in chlorine usage
The Impact of Labeling Effect and Social Media Marketing on Consumer Purchasing Decisions and Loyalty at Super Indo Supermarket Malang Fahmi, Syaifuddin; Indarwati, Peni; Az Zahra, Dita Aulia
Jambura Science of Management Vol 7, No 1 (2025): Jambura Science of Management - January 2025
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37479/jsm.v7i1.27668

Abstract

Purpose: To analyze in depth the impact of labeling effect on purchasing decisions and its implications on consumer loyalty, analyze in depth the impact of social media marketing on purchasing decisions and its implications on consumer loyalty, and analyze in depth the impact of purchasing decisions on consumer loyalty at Super Indo Supermarket Malang, to be able to solve problems related to the National Research Master Plan (RIRN) on the theme of economics and human resources with the focus areas of PRN Social Humanities, Education, Arts, and Culture on the topics of entrepreneurship, cooperatives and MSMEs.Design/Methodology/Approach: The study was conducted on 200 respondents who were met directly at Super Indo Supermarket Malang, while the research respondents were selected by accidental sampling. The collected data were then analyzed using the Structural. Equation Modeling - Partial Least Square (SEM-PLS) method. Where the data obtained from the distribution of questionnaires will be analyzed by looking at and considering the results of the outer model, inner model, and examination of the mediation model.Findings: The results of the study show that the labeling effect has a significant influence on consumer purchasing decisions and loyalty. While on the other hand, social media marketing also influences consumer purchasing decisions and loyalty. There is a mediating role of the purchasing decision variable that connects the labeling effect variable and Social Media Marketing to Loyalty.
Co-Authors Ahmad Muhammad Fuadi, Ahmad Muhammad Dewi, Tiara Nilawati Dwi Susanti Farha, Saniya Indarwati, Peni Kunarfian, Krisna Artur Syaifuddin Fahmi