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All Journal PINISI Discretion Review Jurnal Abdi Negeriku Hayyan Journal
Nur Afni
Universitas Negeri makassar
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Medicine & Pharmacology Social Sciences Other

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The Effect of Service Quality and Price Accuracy on Consumer Confidence and Implications for Sales Increase Denok Sunarsi; Aris Baharuddin; Nur Afni; Andi Anto Patak
PINISI Discretion Review Volume 2, Issue 2, March 2019
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (343.219 KB) | DOI: 10.26858/pdr.v3i2.13255

Abstract

Good service quality within the company will create satisfaction for its customers. The purpose of this study was to determine the effect of service quality and price accuracy on consumer confidence and its implications for increasing sales. The method used is explanatory research with regression tests, coefficient tests, coefficient of determination tests and hypothesis testing. The results of the study it was found that there is a significant influence between service quality on consumer confidence with a determination value of 40.6% and a probability of significance of 0,000 <0.05. There is a significant influence between the accuracy of prices on consumer confidence with a value of 45.1% determination and a significance probability of 0.000 <0.05. There is a significant influence between service quality and price accuracy simultaneously on consumer trust with a determination value of 60.4% and a significance probability of 0.000 <0.05.
Kinetics of Phenol Degradation Using TiO₂/Zeolite Composite Andi Eka Kartika; Sumiati Side; Diana Eka Pratiwi; Nur Afni
Hayyan Journal Vol. 2 No. 3 (2025): October
Publisher : Education and Talent Development Center of Indonesia (ETDC Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51574/hayyan.v2i3.4138

Abstract

Phenol is a hazardous organic pollutant commonly found in industrial wastewater and is difficult to degrade through conventional treatment methods, thus requiring more effective and sustainable approaches. Photocatalytic degradation using TiO₂ has been widely explored; however, its performance is limited by rapid electron–hole recombination and low surface area. Combining TiO₂ with zeolite enhances adsorption capability and increases the availability of active sites, offering a promising strategy to improve photocatalytic efficiency. This study aims to analyze the kinetic behavior of phenol degradation using a TiO₂/zeolite composite and to determine the optimum irradiation time based on a pseudo-first-order kinetic model. Irradiation times of 15, 30, 45, 60, and 75 minutes were applied, and phenol concentrations were measured using UV–Vis spectrophotometry at 270,20 nm. The results show rapid degradation during the first phase (15-30 minutes), with removal efficiency increasing from 83,014% to 87,315%. After 30 minutes, the degradation rate becomes nearly constant, indicating the attainment of photocatalytic dynamic equilibrium. The -ln(Ct/C0) plot reveals two distinct reaction phases: an initial high-rate phase followed by a plateau phase. Therefore, 30 minutes is identified as the most efficient irradiation time, representing the point at which maximum degradation is achieved before the reaction rate significantly decreases. These findings provide meaningful insight into the photocatalytic kinetics of TiO₂/zeolite composites and support their potential application in phenolic wastewater treatment.
EDUKASI PEMANFAATAN LIMBAH KULIT UDANG SEBAGAI SUMBER ASTAXANTHIN KAYA ANTIOKSIDAN UNTUK MENINGKATKAN LITERASI PANGAN FUNGSIONAL MASYARAKAT DI KABUPATEN PANGKEP Muharram Muharram; Subakir Salnus; Nur Afni
Jurnal Abdi Negeriku Vol 5, No 1 (2026): Jurnal Abdi Negeriku
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/jan.v5i1.84461

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan meningkatkan pengetahuan, pemahaman, dan minat masyarakat Kelurahan Sapanang, Kabupaten Pangkajene dan Kepulauan, terhadap pemanfaatan limbah kulit udang sebagai sumber astaxanthin dan bahan tambahan pangan kaya antioksidan. Kegiatan dilaksanakan pada Sabtu, 25 April 2026, melalui penyuluhan dan presentasi kepada 25 warga masyarakat sekitar. Instrumen evaluasi menggunakan angket pretest dan posttest yang mencakup aspek pengetahuan, pemahaman proses, persepsi manfaat ekonomi, serta sikap dan minat peserta terhadap pemanfaatan limbah kulit udang. Instrumen juga memuat penilaian kegiatan pada tahap posttest, yaitu kemudahan pemahaman materi, kebermanfaatan kegiatan, dan minat terhadap kegiatan lanjutan. Hasil analisis menunjukkan peningkatan rata-rata skor dari 33,68 pada pretest menjadi 40,64 pada posttest, dengan rata-rata N-Gain sebesar 0,60 atau termasuk kategori sedang. Uji normalitas Shapiro-Wilk terhadap selisih skor menunjukkan data berdistribusi normal, W = 0,940; p = 0,147, sehingga analisis parametrik menggunakan paired-samples t-test dapat diterapkan. Hasil uji t berpasangan menunjukkan peningkatan skor yang signifikan setelah kegiatan, t(24) = 7,758; p < 0,001, dengan rerata selisih 6,96 dan effect size Cohen’s dz = 1,55. Temuan ini menunjukkan bahwa penyuluhan efektif meningkatkan pemahaman masyarakat mengenai potensi limbah kulit udang sebagai sumber astaxanthin, sekaligus mendorong penerimaan positif terhadap pengembangan program lanjutan berbasis sumber daya lokal.
Co-Authors Andi Anto Patak Andi Eka Kartika Aris Baharuddin Denok Sunarsi Diana Eka Pratiwi Muharram Muharram Subakir Salnus Sumiati Side