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Rizal Irfandi
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Jl. Bumi 18 Blok A 15 No. 1 Bumi Permata Hijau, Makassar, Sulawesi Selatan, Indonesia
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INDONESIA
Hayyan Journal
Published by Education and Talent Development Center Indonesia
ISSN : -     EISSN : 30466679     DOI : https://doi.org/10.51574/hayyan.v1i1.1130
Core Subject : Health, Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Medicine & Pharmacology
Focus and Scope This journal publishes articles related to chemistry. The scope of this journal includes: Inorganic Chemistry Organic Chemistry Physical Chemistries Chemical Instruments Analytical Chemistries Materials Chemicals Industrial chemistry Biochemistry Applied Science Applied Chemistry
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 88 Documents
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The Relationship Between Fast Food Consumption Levels and The Incidence of Anemia In Pregnant Women in the Modern Era at Ujung Loe Public Health Sari, Iramaya; Risnawati, Risnawati
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.v2i3.4748

Abstract

Anemia in pregnant women remains a significant public health problem, both globally and nationally. Data from the World Health Organization (2018) shows that more than 40% of pregnant women worldwide suffer from anemia. In Indonesia, according to the Indonesian Ministry of Health, the prevalence of anemia in pregnant women reaches 48.9% and contributes to the high maternal mortality rate. In the modern era, changes in dietary patterns, particularly the increased consumption of fast food, which is low in iron and high in substances that inhibit nutrient absorption, are thought to play a role in the increased risk of anemia in pregnant women. This study aimed to determine the relationship between fast food consumption and the incidence of anemia among pregnant women at the Ujung Loe Community Health Center, Ujung Loe District, Bulukumba Regency, in 2025. This study used a quantitative analytical design with a cross-sectional approach. A sample of 100 pregnant women in their second and third trimesters was selected using a purposive sampling technique. Data on fast food consumption were collected through a questionnaire, while the incidence of anemia was measured based on hemoglobin levels (Hb <11 g/dL). Data were analyzed using univariate and bivariate methods using the Chi-square test with a significance level of α = 0.05. The results showed that 40% of respondents had high fast food consumption (≥3 times/week) and 35% of pregnant women had anemia. Bivariate analysis revealed a significant association between fast food consumption and the incidence of anemia (p = 0.001). Pregnant women with high fast food consumption had a greater risk of anemia than those with low consumption. It was concluded that there is a significant association between fast food consumption and the incidence of anemia in pregnant women. The results of this study are expected to provide a basis for healthcare professionals to improve education on balanced nutrition and anemia prevention among pregnant women in the modern era.
Ethnobotanical Study of the Use of Soursop Leaves (Annona muricata L.) as Traditional Medicine in Lagosi Village, Wajo Regency Juliasti. A, Hielda; Rompegading, Andi Badli; Ferawati; Risna; Arfiani, Besse
Hayyan Journal Vol. 3 No. 1 (2026): February
Publisher : Education and Talent Development Center of Indonesia (ETDC Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51574/hayyan.v3i1.3477

Abstract

This study is an ethnobotanical study that aims to describe and analyze the use of soursop leaves (Annona muricata L.) as traditional medicine by the community of Lagosi Village, Wajo Regency. The research method used is qualitative descriptive with data collection techniques through semi-structured interviews with informants selected purposively. The results of the study indicate that soursop leaves are used to treat swelling caused by sprains, headaches, and high blood pressure. The methods of use include rubbing the leaves in one direction on the swollen part of the body, the traditional practice of ma'boso for headaches, and boiling the leaves to drink as a blood pressure reducer. Knowledge about the use of soursop leaves is passed down orally from generation to generation and is part of the local wisdom of the Lagosi community. This study emphasizes the importance of documenting traditional knowledge to preserve cultural heritage and as a foundation for further research in the development of natural medicines based on local plants.
DFT Study: Geometry Optimization and Electronic Properties of Steroid Derivative Compounds Ilham, Baso; Riskawati
Hayyan Journal Vol. 3 No. 1 (2026): February
Publisher : Education and Talent Development Center of Indonesia (ETDC Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51574/hayyan.v3i1.3878

Abstract

This study presents a descriptive investigation of three steroidal compounds—6-hydroxystigmast-4-en-3-one (1), stigmast-4-en-3-one (2), and 3-hydroxystigmast-5-en-7-one (3)—using Density Functional Theory (DFT) at the B3LYP level with the 6-31G**(d,p) basis set. The calculations were performed to analyze the optimized geometries and electronic properties of the compounds. The presence of hydroxyl and carbonyl groups within these molecular structures revealed their roles as electron-donating sites and potential active centers for electrophilic attack. Furthermore, several quantum chemical descriptors, including chemical hardness (δ), softness (σ), electronegativity (χ), chemical potential (µ), and electrophilicity index (ω), were determined to provide insights into the reactivity and stability of the studied molecules.
Understanding the Use of Digital Teaching Aids (BBM) in Microteaching of Hikmah Pedagogy: A Conceptual Proposal zakaria, nik zuriani; Zulkifili, Hafizhah
Hayyan Journal Vol. 3 No. 1 (2026): February
Publisher : Education and Talent Development Center of Indonesia (ETDC Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51574/hayyan.v3i1.4311

Abstract

This study aims to understand the use of digital Teaching Aids (BBM) in micro-teaching based on the Wisdom Pedagogy approach in the context of Islamic Education. The analysis focused on the effectiveness of digital BBM, implementation strategies and key challenges faced in the context of values and moral pedagogy. The study findings show that digital BBM such as interactive applications, animated videos, digital whiteboards and virtual platforms can increase student engagement, higher-order thinking skills (HOTS), and support reflective dialogue which is the core of Wisdom Pedagogy. However, there are significant constraints such as teachers' lack of understanding of the concept of wisdom, difficulty accessing BBM that is in line with Islamic values, as well as the level of infrastructure and professional training of teachers which is still insufficient. The study also found that the integration of digital BBM requires a reflective and contextual approach to be in line with the philosophy of Islamic education which emphasizes the development of students' intellect and morals. The contribution of this study is to provide a comprehensive overview of the potential and challenges of using digital BBM in contemporary pedagogy, in addition to suggesting improvements to policies, teacher training and curriculum design that are more relevant to the needs of 21st century education. The results are expected to strengthen microteaching practices that are value-based, reflective and centered on critical thinking in an effort to produce students who are holistic from an intellectual, emotional and spiritual perspective
A Comparative Study of Nanocellulose Isolation Methods from Palm Fiber for Functional Material Applications Sukmawati Said; Mega Savira Utami, Ni Wayan; Nur, Wahyuna
Hayyan Journal Vol. 3 No. 1 (2026): February
Publisher : Education and Talent Development Center of Indonesia (ETDC Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51574/hayyan.v3i1.4818

Abstract

The high cellulose content and abundance of oil palm fiber make it an exceptionally promising sustainable source for nanocellulose production in advanced material science. This study executes a thorough comparative analysis of different isolation strategies covering chemical, mechanical, and enzymatic approaches to derive nanocellulose specifically for functional material development. We aim to clarify how each distinct isolation path dictates the final structural integrity, morphology, and thermal stability of the extracted nanocellulose. By synthesizing data through a systematic literature review, this research evaluates critical metrics such as the crystallinity index and fiber diameter, which directly influence the performance of functional composites. Our analysis reveals that while chemical techniques like acid hydrolysis are superior for achieving high crystallinity, mechanical processes like high-pressure homogenization provide enhanced aspect ratios despite their heavy energy demands. Additionally, enzymatic methods offer a greener pathway, though they often trade speed for environmental benefits. Ultimately, this comparative review serves as a strategic roadmap for researchers to select the most appropriate isolation method based on intended applications, ranging from high-strength bio-composites to flexible electronic components.
Extraction of Carrageenan from Seaweed Eucheuma cottonii Using Sonication Method Yunus, Muhammad Arham; Alya Patrisya, A. Miftah; Nur Artanti, Athiyah; Pagayang, Indriantika; Aswa, Nur Ainun; Maulana Aras, Fiqry
Hayyan Journal Vol. 2 No. 2 (2025): June
Publisher : Education and Talent Development Center of Indonesia (ETDC Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51574/hayyan.v2i2.4834

Abstract

This study aimed to extract carrageenan from the red seaweed Eucheuma cottonii using potassium hydroxide (KOH) as solvent with the sonication method. Extraction was performed at 80°C for 60 minutes with a seaweed-to-solvent ratio of 1:30 (w/v) at an ultrasonic frequency of 40 kHz. The optimized extraction conditions yielded a carrageenan yield of 21.08%. Quality parameters evaluated included moisture content, ash content, viscosity, and gel strength. Moisture content (0.07%), ash content (0.37%), and viscosity (34.2 cP) all met FCC and FAO standards. However, the gel strength of 14.361 g/cm² did not meet the commercial standard.
Utilization of Seaweed (Eucheuma sp) as a Room Freshener Gel Product Yunus, Arham; Nurfiansyah, Nurfiansyah; Yasari, Alma; Fajrianthy; Alimin, Jumriani; Rahmila; Halijah
Hayyan Journal Vol. 1 No. 3 (2024): 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.v1i3.4842

Abstract

This study aimed to formulate a room freshener gel from seaweed (Eucheuma sp) with variations in acetic acid soaking concentrations (0%, 5%, and 10%) and to evaluate its physical characteristics. The seaweed-based gel was produced through soaking, heating, and molding processes combined with gelatin, isopropyl alcohol, and essential oils (lemon, sweet orange, and lily). Quality testing covered moisture content, viscosity, gel strength, and organoleptic properties. Results showed that the soaking treatment significantly affected gel quality. The unsoaked sample had the highest moisture content (24.08%), exceeding the SNI limit of 23.22%, while the 5% and 10% soaking treatments met the standard with moisture contents of 17.43% and 19.64%, respectively. Viscosity values ranged from 62,237 to 73,111 μm/pascal, all within the ideal range for semi-solid gels. Gel strength values of 85.859, 291.45, and 615.77 g/cm² for the three treatments all exceeded the minimum standard of ≥45 g/cm². Organoleptic evaluation by 20 panelists showed that the 5% acetic acid soaking treatment produced the best scores for aroma (3.70) and texture (4.25), meeting the SNI 01-2346-2006 acceptance threshold. This treatment is recommended as the optimal formulation for seaweed-based room freshener gel.
Kinetic Analysis of Dodecylbenzene Sulfonate (DBS) Adsorption Using Coconut Residue Char Based on Pseudo-Order Models Darajat, Zakiyah; Septiani, Mimin; Nur Aisyah, Fauziah
Hayyan Journal Vol. 2 No. 2 (2025): June
Publisher : Education and Talent Development Center of Indonesia (ETDC Indonesia)

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

Abstract

Penelitian ini bertujuan untuk menganalisis kinetika adsorpsi Dodecylbenzene Sulfonate (DBS) menggunakan arang ampas kelapa sebagai adsorben berbasis limbah. Percobaan dilakukan dengan variasi waktu kontak untuk mengamati perubahan kapasitas adsorpsi terhadap waktu. Data hasil eksperimen dianalisis menggunakan model kinetika pseudo-orde satu (PFO) dan pseudo-orde dua (PSO). Hasil penelitian menunjukkan bahwa kapasitas adsorpsi meningkat seiring bertambahnya waktu hingga mencapai kesetimbangan dengan nilai q_e eksperimen sebesar 0,0892 mg/g. Model PFO memberikan konstanta laju adsorpsi k_1 sebesar 0,0254 menit⁻¹ dengan koefisien determinasi (R²) sebesar 0,9379, sedangkan model PSO menghasilkan konstanta laju k_2 sebesar 1,768 g mg⁻¹ menit⁻¹ dengan R² sebesar 0,9949. Nilai q_e teoritis dari model PSO (0,0906 mg/g) lebih mendekati nilai eksperimen dibandingkan model PFO (0,0536 mg/g). Hal ini menunjukkan bahwa kinetika adsorpsi DBS oleh arang ampas kelapa mengikuti model pseudo-orde dua, yang mengindikasikan bahwa proses adsorpsi dikendalikan oleh mekanisme kimisorpsi. Dengan demikian, arang ampas kelapa berpotensi digunakan sebagai adsorben alternatif yang murah dan ramah lingkungan untuk penyisihan surfaktan dalam air.

Page 9 of 9 | Total Record : 88

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