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All Journal KOVALEN: Jurnal Riset Kimia Jurnal Cakrawala Akademika
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UJI AKTIVITAS ANTIBAKTERI EKSTRAK n-HEKSAN, ETIL ASETAT DAN ETANOL KULIT BATANG KAYU EBONI (Diospyros celebica Bakh.) MENGGUNAKAN METODE DIFUSI Ni Luh Sumitriasih; Ahmad Ridhay; Indriani
KOVALEN: Jurnal Riset Kimia Vol. 5 No. 3 (2019): Edisi Desember
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (446.37 KB) | DOI: 10.22487/kovalen.2019.v5.i3.11540

Abstract

A study was conducted on the antibacterial activity test on n-hexane, ethyl acetate, and ethanol extracts of ebony bark (Diospyros celebica Bakh.) using a diffusion method. The purpose of this research is to know the antibacterial activity of ebony bark against Staphylococcus aureus and Escherichia coli bacteria using n-hexane, ethyl acetate dan ethanol. The method of extraction used in this research was maceration method with three polarity levels of solvent. The antibacterial activity test was performed by diffusion-well test. The results showed that ethyl acetate extract gave the highest inhibition of 26.14 mm in gram-positive bacteria (Staphylococcus aureus) and ethanol extract of 25.97 mm in gram-negative bacteria (Escherichia coli). Keywords: Ebony (Diospyros celebica. Bakh), Tree Bark, Inhibitory, Antibacterial
AKTIVITAS ANTIBAKTERI FRAKSI n-HEKSAN, KLOROFORM, ETIL ASETAT BUNGA KAMBOJA (Plumeria alba) TERHADAP BAKTERI Staphylococcus aureus DAN Salmonella typhi ni nyoman rupiniasih; Indriani; Syamsuddin; Abdul Rahman Razak
KOVALEN: Jurnal Riset Kimia Vol. 5 No. 2 (2019): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (261.562 KB) | DOI: 10.22487/kovalen.2019.v5.i2.12572

Abstract

Tests on the inhibition extract of n-hexane fraction, extract of chloroform fraction and extract of ethyl acetate fraction of frangipani flower (Plumeria alba) on Staphylococcus aureus and Salmonella typhi has been done. This study aims to determine the activity of frangipani flower extract on the growth of S. aureus and S. typhi bacteria. Frangipani flowers was macerated using methanol solvents. The obtained methanol extract was partitioned with n-hexane, chloroform and ethyl acetate solvents, respectively. The three extracts were tested for antibacterial activity at a concentration of 10% using the diffusion well method. The test results showed that the n-hexane, chloroform and ethyl acetate fractions showed an inhibition zone of 9.77 mm, 20.89 mm and 19.44 against S. aureus whereas S. typhi showed an inhibition zone of 15.86 mm, 27.69 mm and 21.74 mm. Keywords: Antibacterial, extract of frangipani flower, Staphylococcus aureus, Salmonella typhi.
ANALISIS KLT BIOAUTOGRAFI EKSTRAK KULIT BATANG TANAMAN KAYU JAWA (Lannea coromandelica) TERHADAP BAKTERI Staphylococcus aureus DAN Shigella dysentriae yumita yumita; Abdul Rahman Razak; Indriani; Syaiful Bahri
KOVALEN: Jurnal Riset Kimia Vol. 5 No. 2 (2019): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (430.86 KB) | DOI: 10.22487/kovalen.2019.v5.i2.12786

Abstract

Java wood plants (Lannea coromandelica) is a traditional medicinal plant which is still often used by people to treat internal and external wounds. The study aims to determine the effect of solvent polarity in Javanese stem bark extract on Staphylococcus aureus and Shigella dysenteriae, and to identify the compound groups which had an antibacterial activity against Staphylococcus aureus and Shigella dysenteriae with KLT-Bioautography analysis. The results show that the n-hexane extract of Javanese bark is not showing an antibacterial activity against Staphylococcus aureus and Shigella dysenteriae, whereas the ethyl acetate extract and methanol of Javanese bark show an antibacterial activity against Staphylococcus aureus and Shigella dysenteriae. The results of the TLC-Bioautography test show negative results for Staphylococcus aureus and Shigella dysenteriae. Keywords: Lannea coromandelica, antibacterial, Staphylococcus aureus, Shigella dysentriae, KLT-Bioautografi
Faktor yang Mempengaruhi Peternak dalam Pengembangan Usaha Ternak Sapi Potong di Desa Sarjo Kecamatan Sarjo Kabupaten Pasangkayu Jusman; Ritha Rahayu; Suharno H Syukur; Taufiq Eka Riandhana; Indriani
Jurnal Cakrawala Akademika Vol. 2 No. 1 (2025): Edisi Juni 2025
Publisher : PT. Pustaka Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70182/jca.v2i1.459

Abstract

Penelitian ini bertujuan untuk mengkaji faktor-faktor yang mempengaruhi peternak dalam pengembangan usaha ternak sapi potong di Desa Sarjo, Kabupaten Pasangkayu, Indonesia. Pendekatan yang digunakan adalah kuantitatif deskriptif dengan pengumpulan data melalui wawancara terstruktur menggunakan kuesioner terhadap 32 responden, kemudian dianalisis dengan regresi berganda menggunakan SPSS 21. Variabel yang diteliti meliputi harga bibit, tingkat pendidikan peternak, pengalaman beternak, dan umur peternak sebagai variabel independen, sedangkan perkembangan usaha ternak sapi potong sebagai variabel dependen. Hasil penelitian menunjukkan bahwa harga bibit, pendidikan, dan pengalaman peternak berpengaruh signifikan terhadap pengembangan usaha, sementara umur peternak tidak menunjukkan pengaruh yang signifikan. Nilai koefisien determinasi (R²) sebesar 56,5% mengindikasikan bahwa variabel-variabel tersebut mampu menjelaskan sebagian besar variasi dalam perkembangan usaha ternak sapi potong. Temuan ini menegaskan pentingnya peningkatan akses terhadap bibit berkualitas, peningkatan tingkat pendidikan peternak, dan pengalaman dalam mendukung keberlanjutan dan pertumbuhan usaha ternak sapi di tingkat desa. Keterbatasan penelitian meliputi jumlah sampel yang terbatas dan data bersifat lintas waktu, sehingga hasilnya mungkin belum sepenuhnya mewakili kondisi di daerah lain. Penelitian selanjutnya disarankan untuk melibatkan wilayah yang lebih luas dan mempertimbangkan faktor sosial ekonomi lainnya guna mendukung pengambilan kebijakan yang lebih efektif dan berkelanjutan.
Co-Authors Abd. Rahman Razak Ahmad Ridhay Jusman Ni Luh Sumitriasih ni nyoman rupiniasih Ritha Rahayu Mashudie Suharno H Syukur Syaiful Bahri Syamsuddin Syamsuddin Taufiq Eka Riandhana yumita yumita