Judul: Konsumsi Ikan dan Kaitannya dengan Status Gizi, Tingkat Kecerdasan, dan Prestasi Belajar Siswa Sekolah Dasar di Kabupaten Karawang
Abstrak: This study aimed to determine the relationship between fish consumption and nutritional status, intelligence level, and academic achievement among elementary school students in Karawang district. A Cross-sectional design was used in this study. Samples were 148 students of V and VI grades. The result showed that fish consumed by most samples are shrimp (88.5%), shellfish (81.8%), crab (80.4%), sardines (70.9%), and snapper fish (60.1%). Samples’s average fish consumption and protein intake from fish were 45 g/day and 10.9 g/day, respectively. A total of 60.9% and 70.9% samples had normal nutritional status by BMI/A and H/A. Intelligence Level (IQ) and academic achievement of samples were generally categorized as good. Spearman correlation test showed that there was no significant correlation between fish consumption (frequency, total, protein intake) and nutritional status, IQ level, and academic achievement (p > 0.05), except protein intake with H/A nutritional status (p = 0.020). Nutritional status by BMI/A was not correlated significantly with IQ level and achievement (p > 0.05). Whereas H/A nutritional status had significant correlation with IQ level on 90% confidence level (p = 0.076) and academic achievement (p = 0.029).
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Judul: Konsumsi Ikan, Status Gizi dan Prestasi Belajar Siswa SekolahDasar Kelas IV di Daerah Pantai dan Daerah Non Pantai
Abstrak: The general objective of this study was to analyze fish consumption, nutritional status and learning achievement of 4th grade elementary school children in coastal and non coastal areas. The research was conducted by using Cross Sectional Study design and implemented in September to Desember 2011 in Tanjung Pasir and Ciriung III elementary schools. Samples were determined by purposive sampling, 30 students from coastal and non coastal areas were chosen. Amount of fish consumption in coastal areas (57.6 g) was higher than non coastal areas (32.6 g). Most student in coastal areas (43.3%) and in non coastal areas (76.7%) were caregorized as normal based on BMI for age. There was no significant association between fish consumption with nutritional status. There was a significant association between nutritional status with learning achievement (height for age r=0.320, p<0.05 and BMI for age r=0.255, p<0.05). There was a significant association between fish consumption with learning achievement (p<0.05).
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Judul: Sintesis nanopartikel Cu2ZnSnS4 menggunakan teknik hidrotermal
Abstrak: Nanopartikel Cu2ZnSnS4 (CZTS) merupakan semikonduktor yang berpotensi sebagai fotokatalis untuk reaksi fotodegradasi zat pewarna. Semikonduktor ini memiliki sela pita yang jauh lebih kecil dibandingkan dengan semikonduktor TiO2, sehingga memungkinkan dapat berkerja hanya dengan paparan sinar matahari. Nanopartikel Cu2ZnSnS4 telah berhasil disintesis menggunakan teknik hidrotermal dengan suhu 200 oC selama 24 jam. Larutan Cu2ZnSnS4 dinetralkan menggunakan amonium hidroksida dan dialiri gas N2 sebelum proses hidrotermal. Hasil analisis mikroskop elektron pemayaran menunjukkan nanopartikel Cu2ZnSnS4 mengalami aglomerasi karena memiliki ukuran partikel yang besar. Hasil analisis difraktogram sinar-X menunjukkan bahwa Cu2ZnSnS4 yang dihasilkan memiliki struktur kesterit dengan senyawa fase sekunder yang terbentuk adalah CuS, ZnS, dan Cu2SnS3. Hasil uji fotodegradasi menunjukkan bahwa senyawa hasil sintesis memiliki kemampuan degradasi dibawah sinar matahari lebih baik dibandingkan dengan TiO2. Namun, pada paparan sinar UV, TiO2 mendegradasi biru metilena lebih baik daripada senyawa hasil sintesis. Kapasitas adsorbsi terhadap biru metilena sebesar 2.6780 mg/g menunjukkan bahwa senyawa hasil sintesis tidak mampu mengadsorpsi dengan baik, sehingga disimpulkan bahwa hilangnya biru metilena dari larutan disebabkan oleh fotodegradasi, bukan oleh adsorpsi
Keyword: band gap, Cu2ZnSnS4, kesterite, photocatalyst, semiconductor