Judul: Analisis Sifat Kristal Dan Sifat Optik Pada Keramik SrTiO3 Didadah RuO2
Abstrak: Sintesis keramik Stronsium Titanat (SrTiO3) didadah Rutenium Oksida (RuO2) metode reaksi padatan (solid state) telah berhasil dilakukan. Keramik di annealing dengan suhu 850C. Karakterisasi keramik Stronsium Titanat (SrTiO3) didadah Rutenium Oksida (RuO2) dengan variasi konsentrasi pendadah (0%; 0,5%; 1%) dilakukan untuk mengetahui pengaruh konsentrasi pendadah Rutenium Oksida (RuO2) terhadap sifat kristal dan sifat optik pada keramik Stronsium Titanat (SrTiO3). Struktur kristal keramik berbentuk kubus dengan ukuran parameter kisi a=b=c berturut-turut senilai 3,905 Å; 3,905 Å; dan 3,903 Å. Sifat optik keramik ditunjukkan dengan optik longitudinal dan transversal yang berada pada bilangan gelombang 261-937 cm-1 dan nilai energi celah pita sebesar 3,48 eV-3,56 eV., The synthesis of Strontium Titanate (SrTiO3) ceramic doped with Ruthenium Oxide (RuO2) using the solid-state reaction method has been successfully conducted. The ceramics were annealed at a temperature of 850°C. Characterization of Strontium Titanate (SrTiO3) ceramic doped with Ruthenium Oxide (RuO2) with varying dopant concentrations (0%; 0.5%; 1%) was performed to understand the influence of Ruthenium Oxide (RuO2) dopant concentration on the crystal properties and optical properties of Strontium Titanate (SrTiO3) ceramics. The ceramic's crystal structure is cubic with lattice parameter sizes of a=b=c, respectively, measuring 3.905 Å; 3.905 Å; and 3.903 Å. The optical properties of the ceramic are indicated by longitudinal and transverse optics in the wavenumber range of 261-937 cm-1 and a bandgap energy value ranging from 3.48 eV to 3.56 eV.
Keyword: ceramic, crystal properties, optical properties

Judul: Analisis Sifat Kristal dan Optik di dalam Keramik SrTiO3 didadah Cuprum(II) asetat
Abstrak: Analisis keramik SrTiO3 dengan pendadah Cuprum(II) asetat (Cu(CH3COO)2), variasi konsentrasi pendadah yang digunakan 0%; 0,5%; dan 1% menggunakan metode reaksi padatan (solid state reaction) berhasil dilakukan. Proses annealing dilakukan mulai dari suhu ruang kemudian dinaikkan hingga suhu annealing 850 oC dengan kenaikan suhu 1,67 oC/menit dan ditahan konstan selama 8 jam. Berikutnya dilanjutkan dengan proses pendinginan sampai kembali pada suhu kamar selama 13 jam. Analisis data XRD menggunakan metode Cramer-Cohen menghasilkan parameter kisi a sebesar 3,909 Å; 3,906 Å; dan 3,905 Å, berstruktur kristal kubik. Menentukan nilai Optik Longitudinal (LO) dan Optik Transversal (TO). Nilai energi bandgap yang dihasilkan dari analisis dengan fungsi Kubelka-Munk dan metode tauc plot untuk direct transition berkisar 3,559 eV-3,322 eV., Analysis of SrTiO3 ceramics with Cuprum(II) acetate (Cu(CH3COO)2) , the various concentrations of the scavenger used were 0%; 0,5%; and 1% using the solid state reaction method was successfully carried out. The annealing process was carried out starting at room temperature and then raised to an annealing temperature of 850 oC with a temperature increase of 1,67 oC /minute and held constant for 8 hours. Then proceed with the cooling process until it returns to room temperature for 13 hours. XRD data analysis using the Cramer-Cohen method yielded lattice parameters a of 3,909 Å; 3,906 Å; and 3,905 Å, with a cubic crystal structure. Determine the Longitudinal Optic (LO) and Transverse Optic (TO) values. The bandgap energy values resulting from the analysis using the Kubelka-Munk function and the tauc plot method for the direct transition range from 3,559 eV to 3,322 eV.
Keyword: lattice parameters, longitudinal optic, solid state reaction, SrTiO3, transversal optic

Judul: Infection Of Babesia Bigemina In Cattle And Methods Of Control
Abstrak: Babesia bigemina is the species which occurs mostly through out the tropics and subtropical areas. It gains access to the susceptible cattle through the bite of an· ig fected tick and penetrates an erythrocyte. The pathogenesis of B. bigemina is considered to be as highly pathogenic and may cause heavy mortality in susceptible stock. Infecied cattle rapidly become dull and listless and lose their appetite, the erythrocytes are destroyed resulting anaemia, icterus, emaciation, weakness, and a drop in milk production. Death and loss of productivity due to B. bigemina account for the economic loss.
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