Article Per Year (5 Year)
p-Index From 2020 - 2025
0.947
P-Index
This Author published in this journals
All Journal Prosiding Seminar Biologi IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Jurnal Biologi Tropis Sriwijaya Bioscientia BIOVALENTIA: Biological Research Journal Jurnal Esabi (Jurnal Edukasi dan Sains Biologi)
Harvianti, Yuniar
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Environmental Science Immunology & microbiology Medicine & Pharmacology

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
Pengendalian penyakit hawar pelepah padi akibat Rhizocotonia solani dengan penggunaan bakteri rhizosfer Yuniar Harvianti
Prosiding Seminar Biologi Vol 5 No 1 (2019): PROSIDING SEMINAR BIOLOGI BIODIVERSITAS INDONESIA
Publisher : Jurusan Biologi, Fakultas Sains dan Teknologi, Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/psb.v5i1.11867

Abstract

Rhizoctonia solani merupakan salah satu patogen penting penyebab penyakit hawar pelepah pada padi dan paling sulit untuk dikendalikan.  Penanaman secara luas padi varietas rentan dengan tipe pendek beranakan banyak dan dipupuk dengan dosis tinggi terutama urea, serta sikus penanaman padi yang pendek dapat meningkatkan keparahan penyakit hawar pelepah. Penyakit hawar pelepah menjadi semakin penting peranannya di dalam sistem produksi padi sawah, terutama di daerah pertanian padi yang intensif. Pengendalian hayati merupakan salah satu solusi untuk mengendalikan penyakit tersebut yaitu dengan menggunakan bakteri rhizosfer. Komunitas bakteri rhizosfer dipengaruhi oleh komposisi bahan organik yang terdapat diarea sawah tersebut. Bakteri yang bersifat antagonis terhadap R. solani dapat diisolasi dari tanah sawah yang dapat menekan perkecambahan sklerotium dan miseluim R.solani.
Inventarisasi dan identifikasi tumbuhan dan insekta di sekitar kawasan Taman Firdaus Universitas Sriwijaya Indralaya, Sumatera Selatan Oktariansyah, Yadi; Harvianti, Yuniar; Pragustiandi, Guntur; Safitri, Ayu; Putri, Cyntia Sabarani; Iqbar, Muhammad
Sriwijaya Bioscientia Vol 4 No 2 (2023)
Publisher : Biology Department, Faculty of Mathematics and Natural Sciences, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24233/sribios.4.2.2023.456

Abstract

Penelitian untuk menginventarisasi dan mengidentifkasi tumbuhan dan insekta yang berada di kawasan taman Firdaus dan perkemahan bumi Universitas Sriwijaya, Indralaya dilaksanakan pada 16 November 2024. Penelitian ini bertujuan untuk mengetahui jenis-jenis tumbuhan dan insekta yang ada di kasawan tersebut. Penelitian dilakukan dengan cara eksploratif mulai dari Jurusan Biologi hingga kawasan tersebut. Hasil penelitian pada tumbuhan didapatkan 9 famili meliputi Aracaceae, Asteraceae, Dilleniaceae, Dryopteridaeae, Verbenaceae, Lamlaceae, Malvaceae, Combretaceae, Myrtaceae, dan Dilleniaceae, sedangkan pada insekta didapatkan Lycidae, Lycaenidae, Nymphalidae, Peridae, Libellulidae, Acrididae, Paradoxosomatidae, dan Spirostreptida.
The Effect of Oxidative Stress on Growth and Antioxidant Activity of Microalgae Oocystis sp Musifa, Eva; Warni, Mega; Talib, Ramanisa Muliani; Dharma, Abdi; Mardiah, Elida; Harvianti, Yuniar; Indah, Indah; Tania, Alinda
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 1 (2025): February 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v10.i1.30

Abstract

This study was conducted to see the effect of growth and antioxidant activity of microalgae Oocystis sp before and after adding NaOCl to Growmore medium combined with urea. Antioxidant activity test was conducted by calculating IC50 spectrophotometrically with the 1,1-diphenyl-2-picrylhydrazyl (DPPH) method. Oocystis sp extract was obtained by sonication and maceration process with methanol solvent. The results showed the best growth curve for the growth of microalgae Oocystis sp in a mixture of Growmore medium 0.02% b/v and Urea 0.002% b/v. These results also showed a decrease in Oocystis sp growth in a mixture of Growmore medium 0.02% b/v and Urea 0.002% b/v with the lowest growth decrease in the addition of NaOCl with a concentration of 0.01%. The IC50 value of Oocystis sp extract in methanol solvent has high antioxidant activity in Growmore 0.02% b/v + Urea 0.002% b/v medium, which is 55.5862 mg/L. It can be concluded that NaOCl affects the growth and antioxidant activity of microalgae Oocystis sp, but at certain concentrations NaOCl experienced a negative effect.Keywords: Microalgae, Oocytis sp, Oxidative Stress, Growth, Antioxidant
Hubungan antara pengetahuan, sikap, dan perilaku mahasiswa tentang pencemaran lingkungan sebagai bahan penyusunan media pembelajaran biologi Sidik, Bagas Rasid; Harvianti, Yuniar; Achyani, Achyani; Agusta, Erie
Jurnal Esabi (Jurnal Edukasi dan Sains Biologi) Vol. 6 No. 2 (2024)
Publisher : Universitas Bung Hatta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37301/esabi.v6i2.91

Abstract

Semua bentuk masalah lingkungan hidup yang dihadapi saat ini di dunia, lebih banyak disebabkan oleh sikap dan perilaku manusia terhadap lingkungan hidupnya. Tujuan penelitian ini untuk mengetahui ada atau tidaknya hubungan antara pengetahuan, sikap, dan perilaku mahasiswa tentang pencemaran lingkungan. Adapun metode yang digunakan dalam penelitian ini adalah korelasi ganda. Hasil penelitian menunjukkan bahwa tingkat pengetahuan mahasiswa 70%, lebih tinggi dari sikap 55% dan perilaku 47%. Namun semuanya saling berhubungan antara pengetahuan dengan sikap sig. 0,466, pengetahuan dengan perilaku sig. 0,434, sikap dengan perilaku sig. 0,330 dan bersamaan pengetahuan, sikap terhadap perilaku sig. 0,753, yang artinya bahwa secara bersamaan sangat erat hubungannya terhadap perilaku mahasiswa tentang pencemaran lingkungan. Hasil penelitian ini juga berpotensi sebagai desain media pembelajaran biologi.
The Potential of Immobilized Bacteria for Pollutant Bioremediation in The Environment: Systematic Review Harvianti, Yuniar; M. Ali Azis Hasan Rizki
BIOVALENTIA: Biological Research Journal Vol. 11 No. 1 (2025)
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.11.1.2025.477

Abstract

The Environmental pollution caused by industrial waste including oil spills have become a global issue that requires effective and environmentally friendly solutions. Bioremediation used by bacteria immobilized has been develop as a promising method for pollutant degradation, because it can increase the stability and activity of microorganism under various condition in the environment. This study is a systematic review to evaluate various immobilized technique including adsorption, entrapment, adsorption-embedding, cross linking and the techniques effectiveness in hydrocarbon, crude oil, and heavy metals remediation. This review collates a vast amount of existing literature on the myriad contaminants treated using immobilized bacteria. Based on the reviewed article, the immobilization techniques such as adsorption, adsorption-embedding, entrapment and cross-linking were frequently reported to enhance degradation performance, particularly in crude oil bioremediation. The techniques consistently demonstrated high effectiveness in pollutant degradation across different environmental conditions. The environmental factors, including pH, pollutant concentration and surfactant availability have an important role in the success of bioremediation. Although, this technology enhances bacterial resilience and biodegradation efficiency, the challenges such as the hight cost of immobilization materials and limitations in extreme environment application remain a problem. The optimization techniques and immobilized materials has the potential to provide a sustainable solution for pollutant bioremediation in the environment
Analysis of the Presence of Pathogenic Bacteria Escherichia coli and Salmonella sp. in Organic Fertilizer Harvianti, Yuniar; Permatasari, Atikah; Yulianti, Nurhasanah
Jurnal Biologi Tropis Vol. 25 No. 4 (2025): Oktober-Desember
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.v25i4.10299

Abstract

Organic fertilizers are widely used in agriculture as an environmentally friendly alternative to improve soil fertility and crop productivity. However, their safety remains a concern due to the potential contamination by pathogenic bacteria, particularly Escherichia coli and Salmonella sp., which may pose risks to human health. This study aimed to analyze the presence of E. coli and Salmonella sp. in solid organic fertilizer samples based on the requirements of the Indonesian National Standard (SNI 7763:2024). Laboratory analyses were conducted at the Balai Standardisasi dan Pelayanan Jasa Industri (BSPJI) Palembang using standard microbiological methods, including presumptive and confirmatory tests, followed by Most Probable Number (MPN) estimation. The results confirmed the presence of E. coli colonies with a characteristic metallic green sheen on Eosin Methylene Blue Agar (EMBA), with an estimated concentration of 30 MPN/g, still below the SNI threshold of 100 MPN/g. In contrast, Salmonella sp. was not detected in the samples, as shown by negative growth on Salmonella Shigella Agar (SSA), with an estimated value of <3.0 MPN/g. These findings indicate that the tested organic fertilizer samples comply with microbiological safety standards, suggesting that the production and handling processes were adequate to minimize pathogenic contamination. Continuous monitoring and strict adherence to hygienic practices are recommended to ensure the consistent quality and safety of organic fertilizers in agricultural applications.
Co-Authors Abdi Dharma Achyani Achyani, Achyani Atika Permata Sari Ayu Safitri Bagas Rasid Sidik Elida Mardiah Erie Agusta, Erie Indah Indah Iqbar, Muhammad Musifa, Eva Pragustiandi, Guntur Putri, Cyntia Sabarani Rizki, Muhammad Ali Azis Hasan Talib, Ramanisa Muliani Tania, Alinda Warni, Mega Yadi Oktariansyah yulianti, nurhasanah