Judul: Antibiotic Resistance in Escherichia coli Isolates from  Chicken Noodle Meat around Dramaga Campus IPB University.
Abstrak: Mi ayam merupakan salah satu pangan asal hewan yang berpotensi terkontaminasi bakteri Escherichia coli (E. coli) resistan terhadap antibiotik. Bakteri ini mengancam kesehatan masyarakat karena sulit mengendalikan penyebaran bakteri penyebab infeksi. Tujuan penelitian ini menentukan tingkat resistansi antibiotik isolat E. coli dari daging ayam cincang mi ayam yang dijual di lingkar Kampus Dramaga, IPB University. Pengujian resistansi menggunakan metode Kirby-Bauer disk diffusion dan mengacu pada Clinical Laboratory Standard Institute 2023. Sebanyak 43 isolat teridentifikasi E. coli, tingkat resistansi E. coli diperoleh terhadap ampisilin (49%), tetrasiklin (44,2%), sulfametoksazol trimetoprim (33%), kloramfenikol (23,3%), streptomisin (16,3%), dan sefotaksim (9,3%). Selain itu, isolat E. coli menunjukkan resistansi tingkat intermediet pada antibiotik streptomisin (35%) dan sefotaksim (35%). Isolat bakteri E. coli masih sensitif terhadap kloramfenikol (72%), sulfametoksazol-trimetoprim (65,1%), tetrasiklin (56%), sefotaksim (56%), streptomisin (49%), dan ampisilin (35%). Terdapat isolat E. coli bersifat multidrug-resistance dengan pola ampisilin streptomisin-tetrasiklin-sefotaksim-sulfametoksazol trimetoprim-kloramfenikol. Tingkat resistansi antibiotik yang tinggi pada isolat E. coli memicu masalah kesehatan masyarakat karena bakteri yang resistan dapat menyebar ke tubuh melalui konsumsi makanan yang terkontaminasi, menimbulkan risiko infeksi yang lebih besar., Chicken noodles are one of the animal-derived foods that have the potential to be contaminated with antibiotic-resistant Escherichia coli (E. coli) bacteria. These bacteria threaten public health because it is difficult to control the spread of bacteria that cause infections. The purpose of this study was to determine the level of antibiotic resistance of E. coli isolates from minced chicken meat chicken noodles sold around the Dramaga Campus, IPB University. Resistance testing uses the Kirby-Bauer disk diffusion method and refers to the Clinical Laboratory Standard Institute 2023. A total of 43 E. coli isolates were identified, the resistance level of E. coli was obtained against ampicillin (49%), tetracycline (44,2%), sulfamethoxazole-trimethoprim (33%), chloramphenicol (23,3%). streptomycin (16,3%), and cefotaxime (9,3%). In addition, E. coli isolates showed intermediate level resistance to streptomycin (35%) and cefotaxime (35%) antibiotics. E. coli isolates were still sensitive to chloramphenicol (72%), sulfamethoxazole- trimethoprim (65,1%), tetracycline (56%), cefotaxime (56%), streptomycin (49%), and ampicillin (35%). There were multidrug-resistant E. coli isolates with ampicillin-streptomycin-tetracycline-cephotaxime-sulfamethoxazole trimethoprim chloramphenicol pattern. The high level of antibiotic resistance in E. coli isolates triggers public health concerns as resistant bacteria can spread to the body through the consumption of contaminated food, posing a greater risk of infection.
Keyword: antibiotik, daging ayam, resistansi, escher

Judul: Resistance of Escherichia coli Isolates in  Shredded Chicken Meat of Chicken Porridge Sold Around the Campus of IPB  University
Abstrak: Bubur ayam merupakan salah satu pangan asal hewan yang berpotensi terkontaminasi bakteri Escherichia coli (E. coli) resistan terhadap antibiotik. Escherichia coli yang resistan terhadap antibiotik menjadi masalah kesehatan di dunia karena menyebabkan pengobatan menjadi tidak efektif. Tujuan penelitian ini yaitu mendapatkan gambaran tingkat resistansi antibiotik dari bakteri E. coli yang diisolasi dari daging ayam suwir bubur ayam yang dijual di lingkar Kampus IPB, Dramaga, Bogor. Sebanyak tujuh isolat yang teridentifikasi E. coli dijadikan sampel dalam penelitian ini. Pengujian resistansi menggunakan metode Kirby-Bauer disk diffusion dan mengacu pada Clinical Laboratory Standard Institute 2023. Resistansi E. coli dari daging ayam suwir bubur ayam menunjukkan terhadap tetrasiklin dengan persentase (57%; 4/7) dan diikuti ampisilin dan sulfametoksazol trimetoprim sebesar (14%; 1/7). Isolat E. coli juga menunjukkan hasil intermediet pada ampisilin sebesar (57%; 4/7). Semua isolat bakteri E. coli masih sensitif terhadap streptomisin (100%), sefotaksim (100%), dan kloramfenikol (100%), sedangkan isolat masih sensitif terhadap sulfametaksazol-trimetoprim (86%), tetrasiklin (43%), dan ampisilin (29%). Isolat E. coli bersifat multi-drug resistance dengan pola ampisilin-tetrasiklin-sulfametoksazol trimetoprim.
Keyword: antibiotik, daging ayam, Escherichia coli, resistansi

Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition