Judul: Analisis struktur kristal kalsit (CaC3) dengan metode rietyeld
Abstrak: Telah dilakukan analisis data XRD pada suhu ruang dengan penghalusan parameter metode Rietveld pada bahan kalsit (CaCO3). Dihasilkan nilai indikator R-pola (Rp) 10,43%; R-pola dengan pemberat (Rw) 15, 35%; R-Bragg (Ra) - 3,94%; penyesuaian terbaik (GoF) 3,49 dan faktor Durbin-Watson (d) 0,642. Dalam analisis ini diperoleh 21 parameter yang diperhalus mencakup latar belakang (6), faktor skala (1), pergeseran titik nol (1), bentuk puncak U,V,W (3), koefisien puncak FWHM (3), ocupancy (6) dan arah orientasi yang disukai (1). Hasil analisis juga menunjukkan bahwa struktur kristal kalsit adalah heksagonal dengan parameter kisi hasil penghalusan adalah a=b=4,9891 A, c- 17,0424 A, a-B-90 dan y120"
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Judul: Analisis Rietveld pada Lapisan Tipis Ba0.5Sr0.5TiO3 didadah Niobium dan Klorofil dengan Perangkat Lunak Mineral Analysis Using Diffraction (MAUD) Berbasis Data Spektral XRD
Abstrak: Barium Stronsium Titanat (BST) sangat menarik perhatian peniliti karena memiliki permitivitas dielektrik yang tinggi serta aktifitas feroelektrik. Oleh karena itu dalam penilitian ini telah dilakukan analisis menggunakan metode rietveld dengan basis data XRD barium stronsium titanat yang didadah klorofil dan niobium menggunakan perangkat lunak Mineral Analysis Using Diffraction (MAUD). Hasil menunjukkan parameter kisi rata-rata adalah a=b=c= 3.959 Å, α=β =γ= 90 dan struktur kristal berbentuk kubik, grup ruang (space group) : Pm- 3m. Analisis menggunakan metode rietveld menghasilkan masing-masing nilai Rexp pada lima sampel : 36.11 % (0% control), 62.94% (5% klorofil), 46.57% (5% niobium), 8.49% (10% klorofil), 20.99% (10% niobium), Barium Strontium Titanate (BST) is of great interest to researchers because it has a high dielectric permittivity and ferroelectric activity. Therefore, in this research an analysis was carried out using the Rietveld method with an XRD database of barium strontium titanate containing chlorophyll and niobium using Mineral Analysis Using Diffraction (MAUD) software. The results show that the average lattice parameters are a=b=c= 3.959 Å, α=β =γ= 90 and the crystal structure is cubic in shape, space group : Pm-3m. Analysis using the Rietveld method yielded Rexp values for each of the five samples: 36.11% (0% control), 62.94% (5% chlorophyll), 46.57% (5% niobium), 8.49% (10% chlorophyll), 20.99% (10% niobium)
Keyword: BST, MAUD, Rexp, Rietveld, XRD

Judul: Upaya peningkatan harapan hidup Kupu-kupu Papilio demoleus dari telur hingga imago dengan sistem penangkaran
Abstrak: Utilization of butterflies are often not balanced with maintaining sustainability in nature. Captive breeding is done as an effort to cultivation the plant and wildlife with maintain the purity of the strain. One species of butterfly that can be used is P.demoleus. Establishment the garden of butterfly for ecoedutourism object in Bogor Agricultural University (BAU), is a manifestation of utilizing the butterflies. Increase the life expectancy of a butterfly and be expected to have produced a big population without nature destructive. Captive breeding system was combined with laboratory treatment to increase the life expectancy of a butterfly until imago phase. The process of spawning be located at the dome and treatments performed in the laboratory with observed the imago copulation, life cycle, life expectancy, metamorphosis of P.demoleus, sex ratio, and abiotic factors. Mostly,life cycle of P.demoleus F1 is 34.11 ± 2.70days (29-40 days) and a F2 life cycle is longer 39.07 ± 3.30 days (33-45 days). Survival curve type I, high mortality rate was occurs in adult stage. At the pupa’s phase in the amount of 33.33 percent is the highest mortality. Many deaths in each phase due to parasites, bacteria, and eclosion failure. P.demoleus butterfly life expectancy increased to 44.60 percent from his life expectancy that is 2 percent in the wild. Research about captive breeding system effectivity and renovation of the dome facilities, is support the realization of a butterfly garden at the BAU.
Keyword: Bogor Agricultural University (IPB), utilization of butterflies, Papilio demoleus, mortality, life cycle, Life expectancy