Автор: Ed. by W.L.F. Almarego et cetera
Издательство: BUTTERWORTH &HEINEMANN
Год издания: 2002
isbn: 0-7506-7571-3
Количество страниц: 629
Язык: english
Формат: PDF
Although commercially available laboratory chemicals are usually satisfactory, as supplied, for most purposes in scientific and technological work, it is also true that for many applications further purification is essential.
With this thought in mind, the present volume sets out, firstly, to tabulate methods, taken from the literature, for purifying some thousands of individual commercially available chemicals. To help in applying this information, two chapters describe the more common processes currently used for purification in chemical laboratories and give fuller details of new methods which appear likely to find increasing application for the same purpose. Finally, for dealing with substances not separately listed, a chapter is included setting out the usual methods for purifying specific classes of compounds.
To keep this book to a convenient size, and bearing in mind that its most likely users will be laboratory-trained, we have omitted manipulative details with which they can be assumed to be familiar, and also detailed theoretical discussion. Both are readily available elsewhere, for example in Vogel's very useful book Practical Organic Chemistry (Longmans, London, 3rd ed., 19-56), or Fieser's Experiments in Organic Chemistry (Heath, Boston, 3rd ed, 1957).
For the same reason, only limited mention is made of the kinds of impurities likely to be present, and of the tests for detecting them. In many cases, this information can be obtained readily from existing monographs.
By its nature, the present treatment is not exhaustive, nor do we claim that any of the methods taken from the literature are the best possible. Nevertheless, we feel that the information contained in this book is likely to be helpful to a wide range of
laboratory workers, including physical and inorganic chemists, research students, biochemists, and biologists. We hope that it will also be of use, although perhaps to only a limited extent, to experienced organic chemists.
Автор: Л.Озеров
Издательство: Художественная литература
Год издания: 1988
Количество страниц: 524
Язык: русский
Формат: PDF
В первую книгу включены подборки шедевров лирических откровений классиков поэзии А.Пушкина, М.Лермонтова, Е.Баратынского и отдельные стихотворения менее известных поэтов, многие афористические строки которых давно уже стали "крылатыми словами".
Во второй том сборника "Чудное мгновенье" входят поэтические произведения В.Брюсова, В.Маяковского, С.Есенина, А.Ахматовой, Н.Заболоцкого, С.Гудзенко, В.Высоцкого и других.
Автор: Раковица Г.
Издательство: Бюро пропаганды киноискусcтва
Год издания: 1978
Количество страниц: 24
Язык: русский
Формат: DJVU
Эта красочная книжка подготовлена по одноименному мультипликационному фильму, созданному по мотивам молдавских сказок на киностудии "Молдова-филм". Предназначена для дошкольного возраста.
Автор: Тадэ Э.В.
Издательство: Бюро пропаганды киноискусcтва
Год издания: 1975
Количество страниц: 20
Язык: русский
Формат: DJVU
Эта красочная книжка подготовлена по одноименному мультипликационному фильму, созданному на киностудии "Союзмультфильм". Предназначена для дошкольного и младшего школьного возраста.
Автор: Jorg M. Hormann
Издательство: Schiffer Publishing
Год издания: 1989
isbn: 0887402143
Количество страниц: 126
Язык: english
Формат: PDF (scan)
This is a highly detailed look at the Uniforms of the German Panzer Troops from its beginnings in 1917 to the present day. Containing over 200 photographs, many in colour, showing every component of the uniform including emblems, badges, rank distinctions, sabers and daggers, tunic, jacket, and headwear.
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