Judul: Hubungan Konsumsi Lemak dengan Kejadian Obesitas Orang Dewasa di Kota dan Kabupaten Bogor
Abstrak: Obesity has been becoming a global nutrition epidemic needing a serious concern. This research aimed to estimate the consumption of fat in adult and its relationship with the occurence of obesity in adult of Bogor rural and urban area. Several obesity risk factors were also analyzed in this research. This research was conducted by cross sectional design between June-September 2012. The number of samples in this research was 96 respondents from age 20-65, consisted of 48 samples from rural and 48 samples from urban area. The consumption data was obtained by questionnaire of Food Recall 2x24 hours. Based on the result, the average fat intake for samples in Bogor rural and urban area was 48.7 ± 19 gram/day and 48.8 ± 19 gram/day, respectively. Analysis of fat adequation level of samples showed that most of Rural samples was in excessive status of fat intake (35.4% of samples) while most of Urban samples was in adequate status of fat intake (35.4% of samples). There was no significant different both in fat intake or fat adequation level between Rural and Urban samples (p>0.05). However, pearson correlation test result showed that there was significant correlation (p<0.05) between fat intake and the case of obesity in samples, both in Rural and Urban areas. Besides fat intake, analysis of obesity risk factors by using Logistic Regression analysis resulted in two significant risk factors affecting obesity in samples. The risk factors were smoking status (p=0.005) and alcohol drinking status (p=0.009).
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Judul: Hubungan antara konsumsi lemak trans dengan persen lemak tubuh dan status gizi pada orang dewasa di Kabupaten dan Kota Bogor
Abstrak: The general objective of this study was to determine relationship between trans fat intake with percent body fat and nutritional status of adults in Bogor rural and urban area. The research was conducted using a cross sectional study. The number of samples for each region was 48 adults aged 20-65 years which selected purposively. The results showed that most of samples in urban and rural area were in the state of high deficit of energy sufficiency, i.e. 29.17% and 33.33%, respectively. The percentage of fat sufficiency was 43.75% in rural area, which was categorized as sufficient, and 45.83% in urban area, which was categorized as high. Meanwhile, most of the samples (97.92%) in both areas had sufficient level of trans fat intake as recommended. Distribution of body fat percentage in respondents were 24,81 ± 8,44 in rural area and 27,62 ± 8,01 in urban area. Meanwhile, 58,3% of respondents in rural and 64,4% of respondent had normal nutritional status. There was no significant difference between trans fat intake, adequate intakes of energy, total fat, trans fat, and body fat percentage (p>0,05), however there was significant difference between nutritional status of samples in rural and urban area (p<0.05). There was no relationship between adequate intakes of energy, total fat, and trans fat, with body fat percentage and nutritional status (p>0,05), however there was significant correlation between body fat percentages and nutritional status of respondents (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