cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Dwi Anggorowati Rahayu
Contact Email
dwirahayu@unesa.ac.id
Phone
+6281235407983
Journal Mail Official
jrba@unesa.ac.id
Editorial Address
Department of Biology Faculty of Mathematics and Natural Sciences Universitas Negeri Surabaya Jalan Ketintang Gedung C3 Lantai 2 Surabaya 60231
Location
Kota surabaya,
Jawa timur
INDONESIA
Jurnal Riset Biologi dan Aplikasinya
Published by Universitas Negeri Surabaya
ISSN : -     EISSN : 26559927     DOI : 10.26740/jrba
Core Subject : Health, Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology Medicine & Pharmacology
Jurnal Riset Biologi dan Aplikasinya is a peer-reviewed journal that strives to provide scientific information on the research results which focused on biological science (Ecology, Animal and Botanical Systematics, Microbiology, Zoology, Botany, Biotechnology, and Genetics and Evolution) and biological education (Innovation of Biology Learning, Assessment and Evaluation in Biology, and Media of Biology)
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ecology, Evolution, Behavior and Systematics
Articles 12 Documents
 1   2 
Search results for , issue "Vol. 7 No. 1 (2025)" : 12 Documents clear
Genetic Variation of F2 Progeny Test Acacia auriculiformis A. Cunn. Ex Benth. at KHDTK Blok Playen, Gunungkidul Katon Dewanto, Prasojo; Supriyadi, Supriyadi; Nufus, Malihatun; Siwi Yuliastuti, Dwi
Jurnal Riset Biologi dan Aplikasinya Vol. 7 No. 1 (2025)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrba.v7n1.p99-109

Abstract

Acacia auriculiformis is one of a priority species for forestry in Indonesia. This species has great potential. Breeding of the A. auriculiformis species in KHDTK Blok Playen, Gunungkidul, has reached the second-generation breeding cycle. Further evaluation of the A. auriculiformis progeny test planting in KHDTK Block Playen is needed to develop a certified and more optimal seedling seed orchard.  This study aimed to evaluate the growth of 9-year-old A. auriculiformis progeny test in KHDTK Blok Playen, Gunungkidul. Data collection of tree growth included total height, diameter, branch-free stem height, and stem straightness. Measurements were conducted using the census method on 30 families with four tree plots in 12 blocks of F2 A. auriculiformis progeny test at the KHDTK Blok Playen.  The results of the analysis of variance show that the family source of variation significantly affected the four growth characteristics observed. These results indicate that genetic factors greatly influence the diversity or variation in the measured characters. Strong phenotypic correlation was found between height with diameter character (0,569) and the branch-free stem height with a stem-straightness (0,633). In general, the family and individual heritability values ​​in this study were classified as high. The genetic gain from individual selection (within plot selection) at 25% intensity showed moderate to very high values, ​​ranging from 3.123%-16.494% for the four observed characteristics.
The Inhibitory Effect of East Indonesia Endemic Plant Itchy Leaves on Staphylococcus epidermidis as a Normal Skin Flora Malawat, Siti Rabida Nurhasanah; Warella, Juen Carla; Bandjar, Fitri Kadarsih; Effendi, Effendi
Jurnal Riset Biologi dan Aplikasinya Vol. 7 No. 1 (2025)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrba.v7n1.p66-76

Abstract

Itchy leaf (Laportea decumana) is one of the plants endemic to Eastern Indonesia. People usually use itchy leaves as an alternative treatment for pain and soreness by rubbing it on the surface of the body. Itchy leaves are very useful because they contain abundant secondary metabolites. The application of itchy leaves by rubbing can certainly affect normal skin flora such as Staphylococcus epidermidis, leading to health problems. This study aimed to investigate the effect of methanol extract of itchy leaves on the normal skin flora of S. epidermidis. This test was conducted using the disk diffusion method. The results of this study showed that all concentrations of itchy leaf extract inhibited the growth of S. epidermidis. The highest inhibitory activity was observed at 50% concentration (23.00 ± 7.20), categorized as very strong, followed by 100% concentration (15.00 ± 2.90), 25% (18.00 ± 11.3), 12.5 (13.40 ± 3.51), and 6.25 (10.40 ± 3.10), all categorized as strong. These findings indicate that the prolonged use of itchy leaves may affect the growth of normal flora, resulting in health problems. On the other hand, itchy leaves have the potential to be developed as an antibacterial agent in the future.

Page 2 of 2 | Total Record : 12

 1   2 

Filter by Year

2025 2025


Reset
Filter By Issues
All Issue Vol. 7 No. 2 (2025) Vol. 7 No. 1 (2025) Vol. 6 No. 2 (2024) Vol. 6 No. 1 (2024) Vol. 5 No. 2 (2023) Vol. 5 No. 1 (2023) Vol. 4 No. 2 (2022) Vol. 4 No. 1 (2022) Vol. 3 No. 2 (2021) Vol 3, No 1 (2021) Vol. 3 No. 1 (2021) Vol. 2 No. 2 (2020) Vol 2, No 2 (2020) Vol. 2 No. 1 (2020) Vol 2, No 1 (2020) Vol 1, No 2 (2019) Vol. 1 No. 2 (2019) Vol 1, No 1 (2019) Vol. 1 No. 1 (2019) More Issue