Judul: Pembuatan Film Tipis Barium Titanat (BaTiO3) Didadah Indium Oksida (In2O3) Menggunakan Metode Chemical Solution Deposition
Abstrak: Film tipis Barium Titanat (BaTiO3) telah berhasil dibuat di atas substrat Si (100) tipe P dengan metode Chemical Solution Deposition (CSD) dengan larutan 1 M berbantuan spin coating dengan kecepatan putar sebesar 8000 rpm. Film ini kemudian di annealing pada suhu 850 0C dengan waktu tahan selama 8 jam. Film tipis barium titanat yang didadah dengan indium oksida dengan konsentrasi 0%, 2%, 4%, dan 6% dikarakterisasi dengan UV-Vis dan XRD sehingga menghasilkan energi gap berturut-turut sebesar 3.45 eV, 3.1 eV, 3.5 eV, dan 2.7 eV. Diperoleh kristal berbentuk tetragonal dengan parameter kisi a = b = 4.075003 Å dan c = 4.088857 Å ; a = b = 4.05802 Å dan c = 4.060536 Å ; a = b = 4.037801 Å dan c = 4.042604 Å ; a = b = 4.072917 Å dan c = 4.06868 Å.
Keyword: annealing, bandgap, BaTiO3, CSD, In2O3

Judul: Pembuatan Film Stronsium Titanat Didadah Indium Oksida/Silikon (100) Melalui Metode Chemical Solution Deposition
Abstrak: Telah berhasil dibuat film stronsium titanat (SrTiO3) di atas substrat Si (100) tipe p dengan metode Chemical Solution Deposition (CSD) dengan larutan 1 M berbantuan spin coating dengan kecepatan putar 8000 rpm. Film ini di annealing dengan suhu 8500C ditahan selama 8 jam. Film stronsium titanat (SrTiO3) pada konsentrasi pendadah 0%, 2%, 4%, 6% indium oksida (In2O3) dikarakterisasi sifat optik dan struktur XRD dan diperoleh energi gap berturut-turut sebesar 2.75 eV, 2.3 eV, 2.17 eV, 2.42 eV. Struktur kristalnya berbentuk kubus dengan parameter kisi sebesar a = 3.8020 Å ; a = 3.8208 Å ; a = 3.8482 Å ; a = 3.8541 Å, dan rata-rata ukuran kristalnya sebesar 0.0702, 0.0828, 0.0679, 0.0622 dalam satuan μm.
Keyword: annealing, bandgap, SrTiO3, CSD, In2O3

Judul: Varieties of Peanut (Arachis hypogaea L.) Response on Weeding Frequency
Abstrak: The presence of weeds in peanut cultivation can suppress the growth, development, and productivity of peanut plants. The use of varieties and weeding is one of the efforts to suppress weed growth in the peanut area. This study aimed to study the response of several peanut varieties to the frequency of weeding weeds to compare the growth and yield of peanut plants. This research design used a factorial completely randomized block design (RKLT) consisting of two factors, namely peanut varieties (Hypoma 1, Talam 1, and Tasia 2) and weeding frequency (without weeding, 1x weeding, and 2x weeding). The results showed that the variety had no effect on the total dry weight of weeds, number of leaves, number of empty pods, plant fresh weight, and productivity. Weeding frequency treatment significantly affected weed dry weight, plant height, number of leaves, fresh and dry weight of peanuts, number of pods, dry weight of pods, and productivity. The 2x weeding treatment gave significantly different growth and productivity results from other weeding frequencies with the highest average productivity of 2.4 tons ha-1. The interaction of the two factors on the yield of peanuts had a significant effect on the total number of pods and the number of filled pods. The higher weed competition in peanut plants can suppress the growth and productivity of peanut plants
Keyword: Competion, Productivity, Rottboellia exaltata, Weeds