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All Journal POSITRON JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Animal Production
Julaeha, Juju
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Physics Veterinary

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Extended-spectrum β-lactamase Producing Escherichia coli in Broiler Farms in Ciampea Bogor Putra, Kenedy; Wahyuningsih, Wahyuningsih; Purwanti, Maya; Handayani, Kusuma Sri; Julaeha, Juju
ANIMAL PRODUCTION Vol. 27 No. 1 (2025)
Publisher : Faculty of Animal Science, Jenderal Soedirman University in associate with the Animal Scientist Society of Indonesia (ISPI) and the Indonesian Association of Nutrition and Feed Science (AINI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jap.2025.27.1.299

Abstract

Long-term use of antibiotics in broiler chicken farming causes the emergence of resistant bacteria and increases the potential for multidrug-resistant bacteria. This study aims to investigate the presence and characteristics of extended-spectrum β-lactamase (ESBL) producing Escherichia coli (E. coli) in broiler farms located in Ciampea, Bogor. A total of 90 samples were taken from three broiler chicken farms located in Ciampea, Bogor. Sampling was carried out by swabbing the cloaca of 1% of the population on each farm. Gram staining and IMVIC biochemical tests were performed on colonies suspected of being E. coli. Confirmation of ESBL-producing E. coli using a double disc diffusion test with MHA. The results showed that ESBL-producing E. coli was present in 28,9% of broiler chicken cloaca swab samples (26/90). Antibiotic resistance tests of ESBL-producing E. coli isolates showed resistance to four antibiotics, namely chloramphenicol, amoxicillin, ciprofloxacin, and ampicillin. In this test, 22 isolates showed multidrug-resistant
Determination of Dielectric Constants through Capacitor Measurement Using Variations in Thickness, Area, Materials, and Density Rohman, Syifa Nailufar; Khairina, Jasmine; Julaeha, Juju; Khotimah, Siti Nurul
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 13 No 1 (2024): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v13i1.16134

Abstract

In this study, the researchers focused on testing experimental media from Yeti Rusmiati to measure the dielectric constant of capacitors, with variations in thickness, surface area, material, and density. The experimental results show that the thicker the dielectric material, the smaller the capacitance value. This applies to all materials tested, namely mica, silicon, and duplex paper, with errors from largest to smallest being 24.97% duplex, 7.27% mica, and 0% silicon. Measuring the capacitance of parallel plate capacitors with variations in plate area from GRC gypsum, silicon rubber, and mica, it was found that the error from largest to smallest is mica 11.56%. In comparison, silicon rubber and GRC gypsum have an error of 0%. Measurement of capacitance by varying the dielectric material shows that the capacitance value of the capacitor is proportional to the dielectric constant of the material. Among all the 12 materials tested, the highest dielectric constant is banana leaves with a value of ? = 12.6 and the smallest flannel with a value of ? = 1.02. In contrast, the variation in density shows that the greater the density, the greater the dielectric constant, from the largest to the smallest, the variation in density of leaves steamed with fire, fresh leaves 1 x 24 hours, and dry leaves heated with the sun, respectively 67.51;22.96; 16.57. It can be concluded that Yeti Rusmiati's media can be used in measuring dielectric constant with variations in thickness, area, density, and dielectric material in learning capacitors.
Towards a Formant-Based Model of Sundanese Vowel Distinction: Evidence of Gender-Dependent Acoustic Patterns in /è/, /e/, and /eu/ Suwandi, Galih Restu Fardian; Julaeha, Juju; Khairina, Jasmine; Rohman, Syifa Nailufar
POSITRON Vol 15, No 2 (2025): Vol. 15 No. 2 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v15i2.88904

Abstract

The fundamental frequency (pitch or F0) is the lowest in a sound signal, while the formant frequency is the resonant frequency that occurs in the vocal track. Both are acoustic parameters that are essential to identify sound signals. The pitch and formant are extracted from the subject, which consisted of 16-17-year-old Sundanese, 20 males and 20 females. Praat software extracts pitch and the first to fourth formant (F1-F4) on each sound signal of the letters /è/, /e/, and /eu/. The analysis showed that each vowel /è/, /e/, and /eu/ in males had a smaller pitch and formant than in females, with gradient differences /è/, /e/, and /eu/ was 48.22, 157.49, and 136.27. Regarding the significant level Two Tailed T-Test statistic calculation, most formant frequency comparisons of 2 vocals (/è/ and /e/, /e/ and /eu/, /è/ and /eu/) are significantly distinguished. The study also showed that several vocals had an undistinguished formant frequency at F3. It can be concluded that the pronunciation of /è/, /e/, and /eu/ between males and females can be identified through the fundamental and formant frequency.
Co-Authors Khairina, Jasmine Kusuma Sri Handayani Maya Purwanti Putra, Kenedy Rohman, Syifa Nailufar Siti Nurul Khotimah Suwandi, Galih Restu Fardian Wahyuningsih Wahyuningsih