Acetic acid promotes the reduction of aldehydes and ketones by the readily available N-heterocyclic carbene borane, 1,3-dimethylimidazol-2-ylidene borane. Aldehydes are reduced over 1-24 h at room temperature with 1 equiv of acetic acid and 0.5 equiv of the NHC-borane. Ketone reductions are slower but can be accelerated by using 5 equiv of acetic acid. Aldehydes can be selectively reduced in th...

Many different levels of social complexity have been proposed for the late Hallstatt and early La Tène societies north of the alps. While most models place them at the level of chiefdom societies, or even early states (eg ARNOLD 1995; FISCHER 1995; FRANKENSTEIN AND ROWLANDS 1978; KRAUßE 1999; KRISTIANSEN 1998, to name but a few), some argue for little more than tribal societies (BURMEISTER 2000...

CELL publishes advertisements for positions available and for announcements of meetings, symposia, and courses. The 1995 rates are $425 for a quarter page, $695 for a half page, and $1100 for a full page. We will accept either camera-ready material by mail, or copy to be typeset by mail or fax. If you choose to have your ad typeset by CELL, the size of the ad will be determined by the number of...

CELL publishes advertisements for positions available and for announcements of meetings, symposia, and courses. The 1995 rates are $425 for a quarter page, $695 for a half page, and $1100 for a full page. We will accept either camera-ready material by mail, or copy to be typeset by mail or fax. If you choose to have your ad typeset by CELL, the size of the ad will be determined by the number of...

CELL publishes advertisements for positions available and for announcements of meetings, symposia, and courses. The 1995 rates am $425 for a quarter page, $695 for a half page, and $1100 for a full page. We will accept either camera-ready material by mail, or copy to be typeset by mail or fax. If you choose to have your ad typeset by CELL, the size of the ad will be determined by the number of ...

NEURONpublishes advertisements for positions available and for announcements of meetings, symposia, and courses. The 1995 rates are $175 for a quarter page, $305 for a half page, and $575 for a full page. We will accept either camera-ready material by mail, or copy to be typeset by mail or fax. If you choose to have your ad typeset by NEURON, the size of the ad will be determined by the number ...

CELL publishes advertisements for positions available and for announcements of courses, conferences, and symposia. The 1995 rates are $425 for a quarter page, $695 for a half page, and $1100 for a full page. The 1996 rates are $450 for a quarter page, $725 for a half page, and $1150 for a full page. We will accept camera-ready materials by mail, or copy to be typeset by mail or fax. If you choo...

Positions Available POSITIONS AVAILABLE AND CONFERENCES & COURSES ADVERTISING INFORMATION CELL publishes advertisements for positions available and for announcements of meetings, symposia, and courses. The 1995 rates are $425 for a quarter page, $695 for a half page, and $1100 for a full page. We will accept either camera-ready material by mail, or copy to be typeset by mail or fax. If you choo...