Judul: Pengaruh Konsentrasi dan Valensi Ion Larutan Elektrolit Eksternal Terhadap Konduktans Membran Millipore Pada Berbagai Suhu
Abstrak: Karakterisasi membran dilakukan bertujuan untuk mempelajari fenomena membran yang teQadi, dan demi kemajuan Sains dan Teknologi umumnya dan Biofisika pada khususnya. Salah satunya melalui sifat lisrik konduktansnya. Konduktans membran G dalam larutan elekrolit ekstemal merupakan karakteristik yang menentukan proses filtrasi mikroskopik dari suatu sistem transport ion melalui pori-pori membran. Proses ultrafiltrasi membran dari sistem transport dipengaruhi oleh ukuran dan geometri dan muatan pori membran. Dalam penelitian ini dipelajari bagaimana interaksi ion dengan membran dibawah pengaruh variasi konsentrasi dan valensi ion terhadap konduktans membran pada berbagai suhu menggunakan metode set alat spektroskopi impedasi non invasif sehingga dapat menentukan ukuran kualitatif pori membran dan jenis muatan membran.
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Judul: kajian pengaruh konsentrasi larutan dan valensi ion terhadap energi aktivasi ion ketika melalui membran selulosa  asetat
Abstrak: Membran adalah suatu lapisan yang membatasi dua daerah yang memiliki dua karakter yang berbeda. Karakteristikmembran meliputi sifat listrik, termal, mekanik, dan sebagainya. Salah satu sifat kelistrikan adalah konduktansi membran. Konduktansi membran dapat ditentukan dengan mengukur arus dan tegangan membran. Penentuan tegangan membran dilakukan dengan cara meletakkan membran didalam chamber yang di isi larutan elektrolit. Dalam peenlitian ini digunakan 9 variasi larutan elektrolit berbagai konsentrasi. Nilai tegangan membran diguanakan untuk menghitung nilai konduktansi membran. Konduktansi membran dipengaruhi oleh suhu. Konduktansi membran berbanding lurus terhadap pertambahan suhu. Dari pengolahan nilai konduktansi, kita dapat mengetahui berapa besar nilai energi aktivasi ion masing-masing larutan. Dan hasil penelitian ini dapat dilihat bahwa variasi konsentrasi larutan dan valensi ion memilikipengaruh yang cukup signifikan terhadap nilai energi aktivasi ionnya.
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Judul: Studies on growth spurt and aging in higher primates
Abstrak: single measurement that best defines the health and nutritional status of children, just as it provides an indirect measurement of the quality of life of an entire population. The pattern of human growth reflects the biocultural evolution of our species. The human pattern of growth and development (ontogeny) appears to differ markedly from patterns of ontogeny in other primate species. Three studies are reported here which deal to the growth and development of human and chimpanzee (Pan troglodytes). These three studies allow us to contrast the phenomena of adolescence growth spurt and female elderly bone loss in chimpanzee and human as chimpanzee is the closest species to humans within extant nonhuman primates. In the first, a cross-sectional study of growth of the body size and somatotype of 363 Javanese girls and 299 Javanese boys aged 4 to 20 years from Magelang Regency, Indonesia was described. In the second, cross-sectional and longitudinal studies in the growth of chimpanzee second metacarpal bone linear dimensions from individuals aged 0 to 43.6 years were used for comparison. While in the third, cross-sectional and longitudinal studies in the growth of chimpanzee body size (body mass and anterior trunk length) and second metacarpal bone mineral content were derived. In measuring the second metacarpal dimensions and mineral content, a total of 568 radiographs of chimpanzee's proximodistal left hands were used. They were taken from 68 females and 49 males aged 0 to 43.62 years old. We applied an image analysis system, Scion Image Release Alpha 4.0.3.2 software for Windows to measure bone linear dimensions and bone mineral content. Humans present complex and sinuous growth curves for both body weight and height. A clear growth spurt could be demonstrated by cross-sectional analysis in our girl subjects at around aged 11.5 years and in our boy subjects at around aged 12.5 years. In longitudinal series, not in cross-sectional, several representative chimpanzees of both sexes showed a pre-adult growth spurt on the body sizes, bone dimensions and bone mineral content. They ranged at age 4.5 to 8.5 years. This underscore the fact that adolescent growth spurt in linear dimension was not a universal feature of anthropoid primate ontogeny. Bone loss is a well established characteristic of human female aging. Based on crosssectional analyses the sequential decline of bone mass in female chimpanzee may be said to be genuine. On the other hand, we found in adulthood through elderly, male chimpanzees show a longer plateau than female chimpanzee, that is, bone mineral content is maintained in male.
Keyword: Javanese children, growth spurt, chimpanzee, second metacarpal bone, bone loss, Higher Primates