The light and metal catalysed rearrangement of 3,4-disubstituted-Δ2-1,2,4-oxadiazolin-5-thiones (3) to the corresponding Δ2-1,2,4-thiodiazolin-5-ones (4) is described. The thermal stability of (3) is in great great contrast to the eas...

Panel data from the UK are used to estimate a wage curve allowing simultaneously for time, individual, and spatial effects, thereby correcting for grouped and cross-classified data bias. Estimates of the unemployment elasticity of the w...

Observed instances are given in this paper to show that sub-Alfvénic flow can be formed in the quiet and recurrent low-speed solar wind streams. This kind of flow appears in regions with abnormal enhancement of Alfvénic speed and is a...

Addition of IN3 to alkenyltrimethylsilanes occurs with regio- and stereospecificity to give adducts in which iodine is attached to the carbon atom bonded to silicon. Their transformation by t-BuOK elimination and LiAlH4 reduction are in...

Animals run in taste discrimination or preference studies commonly have an intact olfactory sense. It is shown here that rats can smell chloride salts at concentrations near the taste threshold. From this, it seems advisable that animal...

Fifty-two experimental locations spreading all over the Arab region are chosen. The locations belong to 21 Arab states. Monthly iso-radiation (isopaths) are then drawn. Maps for minimum solar, maximum solar and yearly average radiation ...

The TiPS Lectures were inaugurated to promote interdisciplinary approaches to problems in Pharmacology. The First Annual TiPS Lecture was given at the FASEB meeting in Washington DC, 3 April 1990, by Jean-Pierre Changeux. The following ...

Two new triterpenoids namely putranjivanonol, a hydroxy ketone, and putranjic acid, a hydroxy acid, have been isolated from the trunk bark of Putranjiva roxburghii Wall. (Euphorbiaceae) along with friedelin and putranjivadione and a ste...

We consider a linear elastic rod that comes to impact with a rigid obstacle under the action of a constant body force. The restitution coefficient is defined as the ratio between the rebound velocity and the approaching velocity at the ...

Although the Aedes aegypti female will mate repeatedly soon after emergence, no sperm are transferred during copulation unless the female is 1 to 2 days old. The duration of this refractoriness to insemination varies with the strain of ...

[<< Prev]   1  2  3  4  5 ...  [Next >>] 
Recent Comments