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In vivo Ca2+- Imaging of Mushroom Body Neurons During Olfactory Learning in the Honey Bee
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Horsley's wax
1University of London, Department of Anatomy, Guy's Hospital, London.
Journal of Perioperative Practice
|February 27, 2007
Abstract:
Anyone who has seen a skull bone flap being turned or the sternum being divided at a median sternotomy will be well aware of the considerable bleeding that can occur in these procedures from the highly vascular red bone marrow inside these structures. They will also, no doubt, have seen the surgeon stem the bleeding by smearing wax--Horsley's bone wax--over the cut surfaces of the bone.
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02:29Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis
Overview
Ethers can be prepared from organic compounds by various methods. Some of them are discussed below,
Preparation of Ethers by Alcohol Dehydration
In this method, in the presence of protic acids, alcohol dehydrates to produce alkenes and ethers under different conditions. For example, in the presence of sulphuric acid, dehydration of ethanol at 413 K yields ethoxyethane, whereas it yields ethene at 443 K.
Ethers can be prepared from organic compounds by various methods. Some of them are discussed below,
Preparation of Ethers by Alcohol Dehydration
In this method, in the presence of protic acids, alcohol dehydrates to produce alkenes and ethers under different conditions. For example, in the presence of sulphuric acid, dehydration of ethanol at 413 K yields ethoxyethane, whereas it yields ethene at 443 K.
01:59Solution Equilibrium and Saturation
Imagine adding a small amount of sugar to a glass of water, stirring until all the sugar has dissolved, and then adding a bit more. You can repeat this process until the sugar concentration of the solution reaches its natural limit, a limit determined primarily by the relative strengths of the solute-solute, solute-solvent, and solvent-solvent attractive forces. You can be certain that you have reached this limit because, no matter how long you stir the solution, undissolved sugar remains. The...