A stereospecific nucleophilic substitution between tertiary alkyl bromides and alcohols is described in the Research Article on page 4329 by Toshiki Nokami, Takashi Koike, Manabu Abe, Eiji Shirakawa, Nishikata, co-workers. The entering alcohol formally attacks C−Br bond to undergo a retentive with formation of ethers.

the drilling is well known as one of the most common hole making processes in the industry.due to close tolerance requirement for drilled holes in the most of work pieces, onlinecontrolling of the diameter of drilled holes seems to be necessary. in the current work, an onlinedimensional controlling system was developed for drilling process. doing this, drilling processwas executed in different ...

This little text,-book, containing about a couple of hundred pages, has been written specially for the First Examination in Arts, indeed it closely follows the special syllabus of hygiene prescribed by the Calcutta Universit}'. The idea is to instil the first principles of h\7giene into the rising generation, at an age when the mind is more receptive of new impressions and to some extent more r...