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All Journal Jurnal Biologi Tropis Jurnal Biolokus: Jurnal Penelitian Pendidikan Biologi dan Biologi JPBIO (Jurnal Pendidikan Biologi) Jurnal AbdiMas Nusa Mandiri Journal of Natural Sciences Sriwijaya Bioscientia BIOVALENTIA: Biological Research Journal Jurnal Sylva Lestari Jurnal Medika: Medika
Yadi Oktariansyah
Sriwijaya University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Education Energy Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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From Illumination to Biological Regulation: A Biological Reappraisal of Lighting Management in Chickens – A Review Oktariansyah, Yadi; Putri, Ferta Liza
Jurnal Biologi Tropis Vol. 26 No. 1 (2026): Januari-Maret
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i1.11515

Abstract

Lighting management is a fundamental component of chicken production systems and has traditionally been applied as a technical tool to enhance activity, feeding behavior, and productivity. Increasing evidence, however, indicates that light functions not merely as illumination, but as a key biological signal regulating circadian rhythms, neuroendocrine pathways, behavior, welfare, and long-term production performance. This review provides a biological reappraisal of lighting management in chickens by synthesizing current evidence on how different lighting characteristics influence biological regulation and practical outcomes. A systematic literature review was conducted following PRISMA guidelines, with a qualitative synthesis approach adopted due to heterogeneity in study designs, lighting protocols, and outcome measures. Evidence was integrated across major lighting domains, including photoperiod duration, timing consistency, light intensity, spatial distribution, spectral composition, lighting technology, and stage-specific implementation. Emphasis was placed on identifying primary biological targets, expected production benefits, risks of mismanagement, and relevant monitoring indicators. The synthesized findings demonstrate that lighting management acts primarily through alignment with endogenous circadian and endocrine systems rather than isolated technical parameters. Lighting regimes that preserve circadian stability support sustainable productivity and animal welfare, whereas biologically inappropriate strategies may induce cumulative physiological stress and compromise long-term performance. This review highlights the need to reframe lighting management as a form of biological regulation to support data-driven and biologically informed production systems.
Alternative Feed Use in Poultry Chickens: Impacts on Feed Efficiency and Physiological Parameters—A Systematic Literature Review Oktariansyah, Yadi; Kamal, Mustafa
Journal of Natural Sciences Vol 7, No 1 (2026): Journal of Natural Sciences Maret
Publisher : Mahesa Research Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34007/jonas.v7i1.1110

Abstract

Feed cost and supply instability remain major constraints in poultry production, particularly in smallholder and semi-intensive systems where local chickens are commonly raised. Alternative feeds derived from local resources and agro-industrial by-products have been promoted to reduce reliance on commercial rations, yet evidence regarding their effects on feed efficiency and physiological stability remains inconsistent. This systematic literature review synthesized controlled feeding trials evaluating the effects of alternative feeds on feed conversion ratio (FCR), growth performance, and physiological parameters in poultry chickens. A PRISMA-guided search was conducted using Scopus, Web of Science, PubMed, and Google Scholar, and 20 eligible studies were included in the qualitative synthesis. Evidence was categorized into agro-industrial by-products, plant leaf meals, high-fiber ingredients, fermented feeds, animal-based alternative proteins, antinutrient-rich plants, enzyme-supported diets, hybrid feeding strategies, and layer-phase alternative feeding. Feed efficiency responses were highly context-dependent. Neutral or improved FCR and stable growth were more likely when alternative feeds were used at moderate inclusion levels and supported by fermentation, enzyme supplementation, and adequate micronutrient premixes. In contrast, high inclusion of fibrous or antinutrient-rich ingredients frequently reduced efficiency and increased the risk of metabolic stress. Hybrid feeding strategies produced the most consistent outcomes.
Similaritas dan Korelasi Tumbuhan Invasif pada Tegakan Eksotik di Kawasan Lindung di Kawasan Lindung PT Musi Hutan Persada, Sumatera Selatan Huda, Muhammad Komarul; Setiawan, Arum; Oktariansyah, Yadi; Yustian, Indra; Setiawan, Doni; Pragustiandi, Guntur; Pranoto, Aidil Fitra
Journal of Natural Sciences Vol 7, No 1 (2026): Journal of Natural Sciences Maret
Publisher : Mahesa Research Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34007/jonas.v7i1.1087

Abstract

Invasive alien plants pose a major threat to biodiversity, particularly in conservation areas embedded within industrial plantation forest landscapes dominated by exotic species. This study aimed to analyze the composition and dominance of invasive plants, community similarity, and their correlations with Acacia mangium and Eucalyptus pellita stands in the Protected Area of PT Musi Hutan Persada, South Sumatra. Vegetation analysis was conducted using a nested quadrat sampling method across four stand types (control, A. mangium-dominated, E. pellita-dominated, and mixed stands), with 60 purposively selected plots. Data were analyzed using the Important Value Index (INP), Jaccard similarity index, and Spearman correlation. The results identified 20 invasive plant species, with Eleusine indica as the most abundant. A. mangium and E. pellita exhibited the highest INP at the tree stratum. Similarity analysis indicated variation in species composition, with a tendency toward community homogenization in some locations (≥0.80). Correlation analysis revealed that A. mangium was positively associated with Imperata cylindrica and Chromolaena odorata, while E. pellita was associated with Clidemia hirta and Piper aduncum. These findings highlight the ecological role of exotic stands in shaping the distribution patterns of invasive plants.
PENINGKATAN SKILL SISWA TUNARUNGU MELALUI PELATIHAN PATCHWORK DAN QUILTING BERBASIS APLIKASI SIGN TALK DI SLB-B YPAC PALEMBANG Desiani, Anita; Suprihatin, Bambang; Amran, Ali; Oktariansyah, Yadi; Dewi, Siti Rusdiana Puspa; Jonatan, Jonatan; Prayogo, Slamet; Sinabutar, Lonamonika
Jurnal AbdiMas Nusa Mandiri Vol. 8 No. 2 (2026): Periode April 2026
Publisher : LPPM Universitas Nusa Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33480/abdimas.v8i2.7965

Abstract

Skill development for deaf students at SLB-B YPAC Palembang still faces significant challenges, particularly due to communication barriers between teachers and students that hinder knowledge transfer. This community service program aims to enhance hard skills (technical sewing skills in patchwork and quilting) as well as soft skills (communication, teamwork, and independence) through the integration of an Artificial Intelligence (AI)-based application called Sign Talk. The implementation method was carried out through a workshop and intensive mentoring scheme over 4 months, which included 3 main training sessions, each lasting 120 minutes, for 15 deaf students. Evaluation was conducted using pre-test and post-test instruments analyzed descriptively. The results of the activity showed an increase in students’ soft skills of 40.5%. For hard skills, specifically sewing competencies, there was a 23.31% increase. Although 90% of participants rated the Sign Talk application as very helpful in understanding instructions during the activity, further development of the Sign Talk vocabulary is needed. Additionally, this activity can be expanded to include other hard skill trainings with Sign Talk serving as the communication medium.
Light source effects on egg production and performance modeling of kub chickens Oktariansyah, Yadi; Billa, Afni Salhsa; Masito, Masito
JPBIO (Jurnal Pendidikan Biologi) Vol 11, No 1 (2026): April 2026
Publisher : STKIP Persada Khatulistiwa Sintang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31932/jpbio.v11i1.5742

Abstract

Lighting intensity strongly influences reproductive physiology and productivity in laying hens. This study examined the effects of different light intensities and lamp types on egg production traits in KUB chickens and modeled production dynamics using nonlinear regression. Four treatments were tested: control, 5-watt blue LED, 5-watt incandescent, and 5-watt white LED. Daily egg count, Hen Day Production (HDP), total egg weight, and average egg weight were analyzed using one-way ANOVA and Tukey’s HSD. Results showed that higher light intensities significantly increased egg count, HDP, and total egg weight (p < 0.05), while average egg weight remained unchanged. Logistic models best fit incandescent and white LED groups, whereas blue LED data aligned with an Exponential model. White LEDs offer an energy-efficient option for improving productivity.
Culture optimization for keratinase production by thermophilic bacillus licheniformis AAL3 in keratin waste biodegradation Muharni, Muharni; Hasanah, Khairatul; Harvianti, Yuniar; Oktariansyah, Yadi
JPBIO (Jurnal Pendidikan Biologi) Vol 11, No 1 (2026): April 2026
Publisher : STKIP Persada Khatulistiwa Sintang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31932/jpbio.v11i1.6243

Abstract

Keratin waste is highly recalcitrant due to its complex protein structure, requiring efficient biodegradation strategies. This study aimed to evaluate and optimize keratinase production of thermophilic Bacillus licheniformis AAL3 isolated from the Air Putih hot spring, Lebong, Bengkulu. Qualitative keratinolytic activity was determined using feather meal agar, while quantitative enzyme activity was measured spectrophotometrically based on tyrosine release. The isolate exhibited a higher keratinolytic index (5.0) compared to B. licheniformis SCL2 (1.5). Quantitative analysis showed that AAL3 produced higher cell density (8.9 × 10? CFU/mL) and keratinase activity (1.0074 U/mL). Optimization studies revealed that maximum keratinase production occurred at 60 °C and pH 9. Among the tested carbon sources, 1% glucose resulted in the highest cell growth and enzyme activity, whereas 0.4% peptone was the most effective nitrogen source. The results demonstrate a strong positive correlation between bacterial growth and keratinase production. These findings indicate that B. licheniformis AAL3 has significant potential as a thermophilic keratinase producer for biotechnological applications, particularly in keratin waste biodegradation.
Lansium domesticum metabolites interfere with digestive enzyme function in the rice weevil sitophilus oryzae Oktariansyah, Yadi; Putri, Ferta Liza; Harvianti, Yuniar; Musifa, Eva
JPBIO (Jurnal Pendidikan Biologi) Vol 11, No 1 (2026): April 2026
Publisher : STKIP Persada Khatulistiwa Sintang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31932/jpbio.v11i1.6212

Abstract

Pectin methylesterase (PME) plays a key role in polysaccharide digestion in the rice weevil Sitophilus oryzae, making it a potential molecular target for pest control. This study employed structure-based in silico analysis to evaluate selected metabolites of Lansium domesticum as PME inhibitors. Representative compounds were chosen according to predicted interference mechanisms and docked into the validated catalytic site. All complexes showed structural stability, while interaction patterns revealed six inhibition modes: competitive mimicry, catalytic disruption, orientation interference, channel blocking, polymer mimicry, and interfacial modulation, whereas polyphenols and glycosides produced the strongest interference. The findings indicate that L. domesticum metabolites can disrupt digestive enzymatic processes through multiple complementary pathways, supporting their potential development as biologically derived pest management agents.
Edukasi Biologi Sebagai Ilmu Hayati Terapan dalam Meningkatkan Pemahaman dan Minat Siswa Sma IT Raudhatul Ulum Ogan Ilir Hanum, Laila Hanum; Widjajanti, Hary; Yustian, Indra; Setiawan, Arum; Nurnawati, Elisa; Wardhana, Singgih Tri; Junaidi, Endri; Oktariansyah, Yadi; Harvianti, Yuniar
Jurnal Medika: Medika in progres
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/8stcek83

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan pemahaman dan minat siswa Sekolah Menengah Atas (SMA) terhadap bidang Biologi melalui pendekatan berbasis konservasi dan bioteknologi. Permasalahan yang dihadapi adalah rendahnya pemahaman siswa terhadap ruang lingkup keilmuan Biologi serta terbatasnya informasi mengenai prospek karier lulusan Biologi. Kegiatan dilaksanakan di SMA IT Pondok Pesantren Raudhatul Ulum, Kabupaten Ogan Ilir, dengan metode sosialisasi, pemaparan materi, serta diskusi interaktif. Evaluasi dilakukan menggunakan pre-test dan post-test untuk mengukur peningkatan pemahaman siswa. Hasil kegiatan menunjukkan adanya peningkatan signifikan pada seluruh parameter yang diukur, meliputi pengetahuan tentang jurusan Biologi, pemahaman ruang lingkup kajian, serta pemahaman peluang kerja lulusan. Selain itu, ketertarikan siswa untuk melanjutkan studi di bidang Biologi juga mengalami peningkatan setelah kegiatan berlangsung. Kegiatan ini tidak hanya meningkatkan aspek kognitif, tetapi juga mengubah persepsi siswa terhadap Biologi menjadi lebih aplikatif dan relevan dengan kehidupan sehari-hari. Dengan demikian, kegiatan sosialisasi berbasis konservasi dan bioteknologi ini efektif dalam meningkatkan literasi sains serta minat siswa terhadap Biologi, sehingga berpotensi mendukung pengembangan sumber daya manusia yang peduli terhadap lingkungan dan berorientasi pada pemanfaatan sumber daya hayati secara berkelanjutan.
Lactoferrin as a Potential Immune Biomarker in Breast Milk Exposed to Secondhand Smoke: A Literature Review Sarah Angelica W. Simamora; Artika Sri Wahyuni; Elffisa Eriani; Ario Sucipto; Nayla Khairani; Yadi Oktariansyah
BIOVALENTIA: Biological Research Journal Vol. 12 No. 1 (2026)
Publisher : Biology Department, Faculty of Mathematics and Natural Sciences, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24233/biov.12.1.2026.568

Abstract

Smoking remains prevalent in Indonesia and poses health risks to mothers and infants. Data from the Maternal and Perinatal Death Notification (MPDN) system indicate that maternal mortality increased to 4,129 cases in 2023 from 4,005 cases in the previous year. Although maternal mortality is multifactorial, this highlights the importance of reducing environmental risks such as secondhand smoke (SHS) exposure. SHS is common in household environments and may affect breastfeeding mothers and infants. Breast milk is the main source of infant nutrition and supports early immune protection. Lactoferrin, an iron-binding glycoprotein in breast milk, has antimicrobial, anti-inflammatory, and immunomodulatory functions. SHS-induced oxidative stress may damage the structural integrity of glycoproteins in breast milk, including lactoferrin, which can impair their immunological functions. This literature review aims to examine the potential role of lactoferrin as an immune biomarker in breast milk from mothers exposed to SHS. This study used a literature review approach by identifying, selecting, and synthesizing relevant scientific articles on SHS exposure, breast milk composition, lactoferrin, and infant immune protection based on predetermined inclusion criteria. The reviewed literature indicates that SHS exposure is associated with oxidative stress and inflammatory responses, which may interfere with lactation quality and alter immune-related glycoproteins in breast milk. Lactoferrin is considered a potential biomarker because it is related to antimicrobial activity, immune regulation, and infant protection against infection. This review concludes that reducing household SHS exposure is important to protect breastfeeding mothers and maintain breast milk immunological quality. Further empirical studies are recommended to examine the direct relationship between SHS exposure intensity and lactoferrin levels by considering lactation stage, maternal nutritional status, infant age, infection history, and breastfeeding patterns.
Co-Authors Ali Amran Amrillah Nugrasyah Anita Desiani Ario Sucipto Artika Sri Wahyuni Arum Setiawan Arum Setiawan Ayu Safitri Bambang Suprihatin Billa, Afni Salhsa Cahyani, Riski Desitarani Doni Setiawan Elffisa Eriani Elisa Nurnawati Endri Junaidi, Endri Febrian Hadinata Habiburrahman, Muhammad Hanum, Laila Hanum, Laila Hanum Harvianti, Yuniar Hary Widjajanti Hasanah, Khairatul Huda, Muhammad Komarul Indra Yustian Iqbar, Muhammad Jonatan, Jonatan Laila Hanum Masito, Masito Muhammad Ikhsan Muharni Muharni Musifa, Eva Mustafa Kamal Nayla Khairani Novira, Sandra Patricia, Margareth Pragustiandi, Guntur Pranoto, Aidil Fitra Prayogo, Slamet Putri, Cyntia Sabarani Putri, Ferta Liza Ramadhani, Audya Rahma Sarah Angelica W. Simamora Sarno . Sinabutar, Lonamonika Siti Rusdiana Puspa Dewi Wardhana, Singgih Tri Zainal Fanani