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Isotopic fractionation study towards massive star-forming regions across the Galaxy
One of the most important tools to investigate the chemical history of our Galaxy and our own Solar System is to measure the isotopic fractionation of chemical elements. In the present study new astronomical observations devoted to the study of hydrogen and nitrogen fractionation (D/H and 14N/15N ratios) of molecules, towards massive star-forming regions in different evolutionary phases, have been presented. Moreover, a new detailed theoretical study of carbon fractionation, 12C/13C ratios, has been done. One of the main results was the confirmation that the 14N/15N ratio increases with the galactocentric distance, as predicted by stellar nucleosynthesis Galactic chemical evolution models. This work gives new important inputs on the understanding of local chemical processes that favor the production of molecules with different isotopes in star-forming regions.
The Origins
There are many fundamental issues, whether scientific, cultural, religious, and even philosophical, that we accept as fact or truth, simply because our peers have done so. Our peers have been wrong before. For two thousand years Euclidean geometry and geo-centricity was the absolute truth in scientific and religious communities. Law of some of these issues concern the origins of our domain. Origin of the universe, origin of life on earth, origin of Homo-sapiens, origin of what we categorize as civilization and origin of religion, particularly monotheistic religions. This book has endeavored to investigate these five very fundamental issues, in simple and non-scientific language as far as con...
Laura
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Daughter of Mine
Tiziana Manoretti is an only child in her late twenties blessed with loving parents, a promising career, and a best friend who fiercely protects her. When her mother falls seriously ill and the relationship between her parents becomes suddenly strained, a carefully hidden family secret is revealed and Tiziana's seemingly idealistic world is turned upside down. After discovering she was born in a Naples orphanage and subsequently given up for adoption, Tiziana sets out for the small town of Gaeta in an attempt to find her birth parents. Meanwhile, her best friend Christopher is sending her mixed messages, causing her to wonder if there is more to their relationship than just companionship. As...
Laura
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Laura
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Laura Laura
'[Francis] is just so good at the transcription and transformation of everyday ordinary life, all seen from sideways on, so that everything becomes so strange and so funny.' - Tessa Hadley
'l'
'L' by Laura Levy - twin stories knitted together lyrically - one story is English, the other Jewish. This is a story of love and friendship, fun, hate, disaster, tragedy - and families.
