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All Journal Prosiding Seminar Biologi Abdimas Lembaran Ilmu Kependidikan Biogenesis: Jurnal Ilmiah Biologi Phenomenon : Jurnal Pendidikan MIPA Journal of Biology Education Unnes Science Education Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Biosaintifika: Journal of Biology & Biology Education Journal on Education Journal of Innovative Science Education JIKAP PGSD: Jurnal Ilmiah Ilmu Kependidikan Proceeding Biology Education Conference Jurnal Puruhita Life Science Journal of Environmental and Science Education Jurnal Pemberdayaan Masyarakat Prosiding Seminar Nasional Pascasarjana Proceeding of International Conference on Science, Education, and Technology Jurnal Manusia dan Lingkungan Bookchapter Alam Universitas Negeri Semarang Proceeding Seminar Nasional IPA Prosiding Seminar Nasional Biologi Unnes Science Education Journal Journal of Biology Education Jurnal Dharma Indonesia Life Science
Sri Ngabekti
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Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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Journal : Life Science

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Pengaruh Laju Injeksi Karbondioksida terhadap Oksigen Terlarut dan Pertumbuhan Spirulina platensis Al Anshori, Aziz; Sri Ngabekti; Andhina Putri Heriyanti; Amnan Haris
Life Science Vol. 13 No. 2 (2024): November 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/unnesjlifesci.v13.i2.14327

Abstract

Indonesia has a high and continually increasing total greenhouse gas emission. Carbon dioxide absorption can be mitigated by utilizing the photosynthesis process of microalgae. Spirulina platensis was chosen as the sample to be cultivated in this study due to its ease of cultivation and its status as a large-scale carbon dioxide absorber. The objective of this research is to analyze the effect of varying carbon dioxide injection rates on dissolved oxygen and the growth of S. platensis. This research employed an experimental method involving semi-mass cultivation using a 12 L volume tube photobioreactor (PBR) as a container with three treatment variations. These variations included culture P0 (without injection/control), culture PA (0.5 L/minute), and culture PB (1 L/minute). The data analysis revealed that the variation with an increase in dissolved oxygen levels and enhanced growth of S. platensis was most optimal in culture PB (1 L/min). One-way ANOVA results showed significant differences between culture P0 (without injection) and classified data indicating that culture PB (1 L/min) fell into a high-level classification. The average dissolved oxygen value for culture PB (1 L/min) was 7.9 mg/L, with a cell density average of 0.651 cells/ml and a dry biomass weight of 3.8 grams. The conclusion drawn is that varying carbon dioxide injection rates significantly affect dissolved oxygen levels and the growth of S. platensis, as evidenced by cell density and biomass calculations. The effect on the S. platensis culture is a notable increase in both parameters. The application of varying carbon dioxide injection rates in the cultivation of S. platensis may serve as a reference for identifying the optimal carbon dioxide injection rate during semi-mass cultivation.
Keanekaragaman Spesies Arthropoda di Badan Air dan Sekitar Mata Air Kecamatan Gunungpati, Kota Semarang: Diversity of Arthropod Species in Water Bodies and Around Springs in Gunungpati District, Semarang City Novianti, Ira; Nana Kariada Tri Martuti; Partaya; Sri Ngabekti
Life Science Vol. 14 No. 2 (2025): November 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/unnesjlifesci.v14.i2.28890

Abstract

Arthropods are the largest phylum in the Animalia kingdom that can live on land, in freshwater, in the sea, or in the air. Springs are bodies of water that seep out through cracks in rocks to the surface of the ground, serving as a habitat for various Arthropods and the Gunungpati district has several springs in its area. This study aims to analyze the diversity of arthropod species and to describe the abiotic and biotic factors that influence the diversity of arthropod species in the water bodies and around the springs in the Gunungpati district, Semarang City. The research was carried out from October to December 2022, located at five springs, among others. The research was conducted from October to December 2022 at five springs, namely Sendang Jedung, Sendang Lanang Trangkil, Sendang Ndelik, Sendang Mbiru, and Sendang Gede. The data collection method was purposive sampling. The approach used in this research is a quantitative approach with a descriptive research type. The research results showed a total of 1537 individuals and 112 species of arthropods, which included 146 individuals in water bodies and 1391 individuals around springs. The diversity index ranged from moderate to high, between 1.82-3.30. The dominance index values were low, ranging from 0.05-0.29, and the evenness index values fall within moderate to high criteria, ranging from 0.52-0.86. The Sorenson similarity index on the five ponds is considered low. Abiotic factors do not affect diversity too much because it has similar values in the five springs. Therefore, biotic factors (organic matter, litter, and surrounding vegetation) greatly influenced the diversity of arthropod species in water bodies and around the spring in Gunungpati District, Semarang City.  
Co-Authors A.A. Ketut Agung Cahyawan W Abdillah, M.L. Abdul Jabbar Adina, Winardita Putri Aditya Marianti Afif, Jamaludin Agus Setiowati, Agus Al Anshori, Aziz ALIFIANSYAH, JUANDRA Amin Retnoningsih Amin Yusuf Amnan Haris Andhina Putri Heriyanti Andin Irsadi Andreas Priyono Budi Prasetyo Ani Rusilowati Astuti, Eni Dwi Bambang Priyono Bayuntoro, Johan Tri Budi Astuti D. Maria Darning Rakhmawati, Darning Desi Rahmasuci Devi Alvitasari, Devi Dewi Liesnoor Setyowati Dewi, Rizqi Mareta Diennurrahma, Aufa Dwi Prasetyo Dyah Rini Indriyanti Eling Purwantoyo ENDAH KUSUMAWATI Endang Susilaningsih Enni Suwarsi Rahayu Eny Hartadiyati Wasikin Haryanti Erie Triwijananti, Erie Erisca Candra Setyana Evi Setyowati, Evi Fadlillah, Umi Fariz, Trida Rdiho Fatmawati, Titi Fauziah, Ismarlini Nur Fauziah, Ismarlini Nur Febrianto, Taufan Handayani, Octarina Tri Haris, Amnan Herditiya, Herditiya Heriyanti, Andhina Putri Heru Susilo Husna, Destri Nurul Husna, Destri Nurul Ilma, Nailul Indrayanti, Inggrid Intan Zainafree Jati, Anis Lina Johan Tri Bayuntoro, Johan Tri KARTIKA WIDYANINGRUM Kartuti, Kartuti Khikmatun, Laili Kholil, Putri Alifa Kisworo Kisworo, Kisworo Krispinus Kedati Pukan Kukuh Santoso Kukuh Santoso Labibah, V.R. Lathifah, Nila Nadiyya Lianita Rarasandy Lilis Erfianti Linda Noviyanti Linda Noviyanti Lisdiana Lisdiana Listiaji, Prasetyo Ma'rufah, Dian Muhimmatun Margareta Rahayuningsih Nugroho Edi K Masduqi, Mahbub Mayang Arundina Mayang Arundina Muhamad Mustofa, Muhamad Muhammad Abdullah Mulia, Vivin Lesandra Mutiara Nurul Lita Azizah Mutiara Nurul Lita Azizah Nafi'ah, Miftahun Nana Kariada Tri Martuti Nana Kariada Trimartuti Nanik Wijayati Ning Setiati Novianti, Ira Noviyanti, Linda Nugrahaningsih Wahyu Harini, Nugrahaningsih Wahyu Nugroho Edi Kartijono Nur Kusuma Dewi Nurmasitoh, Qonita Amalia Nurul Azmi Nurul Setiyanika Parmin Parmin Partaya Partaya, Partaya Partaya, Partaya Pit’ay, Marisa Fonny Pradyna Niata WA Pratama, Yesy Milda Paula Priyantini Widiyaningrum Putri, Devita Roesikusuma R. Rijanta Ragilia Novitasari, Ragilia Retno Sri Iswari Retno Sri Iswari Rifana Habiba Risa Dwita Hardianti Rizki Nor Amelia Rizqiyah, Iffatur S. Djalal Tandjung S. Djalal Tandjung Saiful Ridlo Sanjivanie, Hasti Apri Satria, Arif Bayu Setianingsih, Rizki Sigit Saptono Siti Aminah Siti Aminah Sovi Junita Eviyanti Sri Mulyani Endang Susilowati, Sri Mulyani Endang Sri Sukaesih Sri Suryaningsih Sri Widowati Sudarmin Sudarmin Sudaryati Sudaryati Sugiyanto R. Sugiyanto Sugiyanto Sugiyanto R. Sugiyanto Sugiyanto, Sugiyanto R. Sugiyanto Sulaiman, Meltasari Sultan, Habil Sumardani Sumardi . Susani, Devi Erfa Susani, Devi Erfa Sutopo, Agung Suwarti Suwarti Swarsi Rahayu, Enni Talitha Widiatningrum Tefarani, Rahmadyan Trida Ridho Fariz Tyas Agung Pribadi, Tyas Agung Ulfa, Dwi Mariana WA, Pradyna Niata Wahid Aksin Budi NS Wahyuningsih, Penny Watoni, Edi Satria Wicaksono, Maulana Malik Widyaningrum, Priyantini Wiyanto Wiyanto Woro Sumarni Wulan, Intan Nawang Wuryadi Wuryadi Wuryadi Wuryadi Yesy Milda Paula Pratama Yulalifah, Lilif Yustinus Ulung Anggraito Zubail, Dien Rosiana Zuhrotunnisa, Asri