Judul: Analisis Pindah Panas pada Alat Pengering Surya Hibrida
Abstrak: Alat pengering surya hibrid memanfaatkan energi surya dan biomassa sebagai usaha diversivikasi sumberdaya energi. Bentuk Kolektor di atas ruang pengering yang didalamnya berisi rak-rak dirancang mampu meningkatkan kapasiatas produksi sampai 21,5 kg/m².
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Judul: Disain dan Uji Teknis Alat Pengering Hasil Pertanian Dengan Radiasi Surya
Abstrak: Penelitian ini dilakukan dengan tujuan untuk 1) mendisain dan membuat suatu alat pengering hasil pertanian dengan radiasi surya, 2) melakukan uji performance alat dan 3) mencoba suatu cara memperoleh penyerapan energi surya dan penyebaran suhu yang lebih baik dalam proses pengeringan dalam ruang pengering dengan memakai tambahan alat yang dikenal sebagai kolektor panas serta 4) melakukan analisa biaya dari bahan yang digunakan. Komponen utama dari alat pengering hasil pertanian dengan radiasi surya adalah 1) pengumpul panas atau kolektor, berfungsi sebagai penyerap energi panas surya, 2) ruang pengering dan 3) rak atau tampah pengering yang berfungsi sebagai wadah bagi bahan yang dikeringkan dan terdiri dari lima tingkat. Dari hasil pengujian pada kapasitas masing-masing 1.797 kg/m², 2.460 kg/m² dan 2.890 kg/m², gaplek dengan kadar air awal rata-rata 65% bb dan dan dikeringkan pada selang suhu 45° C 59° C untuk menurunkan kadar air menjadi 14% bb, dibutuhkan waktu pengeringan masing-masing 6.5 jam, 8.5 jam dan 8 jam efektif.
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Judul: Effects of Alcohol Consumption on Spatial Memory Performance and Neuron Complexity
Abstrak: Alcoholic beverages have always been a common drink all around the globe. The ethanol that is contained inside these alcoholic beverages have been known to have various negative side effects to the brain if consumed excessively. Other articles have claimed a certain moderate amount of alcohol consumption could have beneficial effects on the brain, but no exact concentration limit of consumption has been elaborated to cause damage in the hippocampal area. The objective of this research is examining the effects of alcohol towards neuron complexity and spatial memory performance. Four groups of mice were used as test subjects and were given the solution pre-orally. The first group is the control group which is given water, the second group was given 5% alcohol, the third group was given 15% alcohol, and the fourth group was given commercially sold alcoholic beverage. The mice were given said solutions in the span of 30 days. Spatial memory performance is observed by how a mice scores inside a Y-maze in the span of 5 minutes after 30 days of treatment. Neuron complexity is determined by the number of intersections of dendrites and the maximum angle of neurons inside the Dentate Gyrus (DG) and Cornu Ammonis (CA) region of the hippocampus which is observed by Golgi-Cox staining, photographed with optilab and then analyzed using the ImageJ application. alcohol consumption does not have any significant effect on spatial memory performance nor neuron complexity in the hippocampal area. These findings are not significantly different than the control group, possibly because the treatment is not chronic enough to trigger a significant physiological change.
Keyword: Ethanol, spatial memory, complexity, hippocampus