Автор: Alan Rodgman, Thomas A.Perfetti
Издательство: CRC
Год издания: 2008
isbn: 1420078836
Количество страниц: 928
Язык: english
Формат: PDF
Authored by two longtime researchers in tobacco science, the book examines the isolation and characterization of each component. It explores developments in pertinent analytical technology and results of experimental studies on biological activity, toxicity, and tumorigenicity, including the inhibition of adverse biological activity of specific tobacco smoke component by another tobacco smoke component. The authors discuss the controversies over the extrapolation of the biological effect of a specific component administered individually by one route versus its biological effect when the component is in a highly complex mixture and is administered by a different route. They also cite studies in which cigarette design technologies were developed to control the per cigarette mainstream smoke yield of Federal Trade Commission-defined tar and one or more specific tobacco smoke components of concern.
Издательство: Радіоаматор
Год издания: 2010
Количество страниц: 66
Язык: русский
Формат: DJVU
Журнал "Радіоаматор" - увлекательный путеводитель в мир радио для тех, кто ради увлечения либо по роду своей профессиональной деятельности работает в эфире, занимается разработкой и ремонтом разнообразных радиоэлектронных устройств. Это журнал для тех, кто привык работать со схемой на столе и с паяльником в руках, кто своим призванием считает практическую радиоэлектронику.
Автор: Jean-Louis Tassoul
Издательство: Cambridge University Press
Год издания: 2000
isbn: 0511009631
Количество страниц: 273
Язык: english
Формат: PDF
In the mid-1970s, we had no direct information about the internal rotation of the Sun. Little was known about the rotation of main-sequence stars of spectral type G and later, although it was already well established that the surface rotation rate of these stars decayed as the inverse square root of their age. We certainly had much more information about axial rotation in the upper-main-sequence stars, but the actual distribution of specific angular momentum within these stars was still largely unknown. On the theoretical side, important progress in the study of rotating stars had been made by direct numerical integration of the partial differential equations of stellar structure. However, because there was no clear expectation for the actual rotation law in an early-type star, the angular momentum distribution always had to be specified in an ad hoc manner. The presence of large-scale meridional currents in a stellar radiative zone was also a serious problem: All solutions presented to date had unwanted mathematical singularities at the boundaries, and the back reaction of these currents on the rotational motion had never been properly taken into account. As far as I remember, there was only one bright spot that was emerging from this rather gloomy picture of stellar rotation: The observed degree of synchronism and orbital circularization in the short-period close binaries appeared to be in reasonable agreement with the (then current) theoretical views on tidal interaction in close binary systems. The year was 1977 and, as I said, we did not realize that the tide was turning fast.
Автор: коллектив
Издательство: Edizioni Idea Donna S.R.L.
Год издания: 1997
Количество страниц: 124
Язык: другой
Формат: JPG
Периодический журнал по рукоделию на итальянском языке. В номере изысканные вышитые скатерти, стулья, подушки, покрывало в детской. А так же комплект на кухню: скатерть, салфетки, полотенца, занавески, передник. Красивые вязаные модели для детей и дам. И пару рецептов итальянской выпечки.
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