Irradiated benzene ice provides clues to meteoritic organic chemistry

Algal Clues to Antarctic Ice Shelf Ages

1111 Algal Clues to Antarctic Ice Shelf Ages The naturally high variability of sea ice extent in Antarctica and the short duration of instrumental records have combined to obscure any clear record of sea ice coverage change. Curran et al. (p. 1203; see the Perspective by Wolff) present an ice core record of methanesulfonic acid, a species produced by algae living at the edges of ice shelves, wh...

Aids to Organic Chemistry

Aids to Organic Chemistry

1'iiis shor-t monograplh, awarded the 1951 "Jacksonian Prize" by the Council of the Royal College of Surgeons, epitomises modern thought on the Surgery of Pancreatic Neoplasms. It is only during the past two decades that widespread surgical attention has been directed towards the radical cur-e of carcinoma of the pancreas, for long a field of the great masters, and the dar-ing pioneers. Ev'en t...

Neuropathology provides clues to the pathophysiology of Gaucher disease.

To better understand the pathogenesis of brain dysfunction in Gaucher disease (GD), we studied brain pathology in seven subjects with type 1 GD (four also exhibited parkinsonism and dementia), three with type 2 GD and four with type 3 GD. Unique pathologic patterns of disease involving the hippocampal CA2-4 regions and layer 4b of the calcarine cortex were identified. While these findings were ...

Heuristic Approach to Organic Chemistry

An important question in organic chemistry is how does a chemist synthesize chemicals in the most efficient way beginning with chemicals readily available. These problems are known as synthesis problems. Currently, methods based on databases (Chen, 2006) and methods related to quantum mechanics (Jorgensen, 1998) are used frequently to solve this problem. When solving synthesis problems by hand,...