Powder feathers

Powder feathers grow continuously, usually on the breast or belly of the bird. The barbs of these downy feathers break down, disintegrating into a fine powder. This dust may help the bird with preening and waterproofing of other, larger feathers. Birds in the family Ardeidae, which includes herons and bitterns, have the most powder feathers, although they do appear mixed in with normal down in many other bird species. 

Mercury azide forms a white powder, which is insoluble in cold water, but relatively soluble in hot water. When gently heated to 212 Celsius, the salt begins to fizzle. The salt detonates if rapidly heated or when heated to 300 Celsius. The precipitated mercury azide is less sensitive then lead azide, but recrystallization of this precipitated form from hot water yields the very sensitive form of mercury azide (not prepared in this procedure). This recrystallized form is too unstable for use in priming mixtures or blasting caps, and its sensitivity is related to the ammonium iodide/nitrogen triiodide salt—can be detonated by a feather. The precipitated mercury azide however, can be used as an effective substitute for LZ in blasting caps. ... 

Six white feathers and an ordinary scent spray or atomizer are shown when sprayed upon, each feather becomes any colour desired. The feathers have previously been carefully dusted with six different aniline dye powders and then shaken, so that to all appearance, all the dye powder is shaken off. If... 

The Eng lish Last is an English measure of various articles. A last of soap, ashes, herrings, and some other articles, is 2 baiTcls. A last of com is 10 quarters. A last of gun-powder, 24 bairels. A last of flax or feathers, 1,700 pounds. A last of wool, 12... 

Extinguish the fire, let the crucible cool for one day, and open it. Brush it with a feather to collect the product. This is the sublimated essence. [9b] When it is made into a powder, it has the name of Divine Elixir. 

Pale yellow, feather like, crystalline powder, extremely hygroscopic fumes in air with formation of blue smoke, which later turns dark violet. Nitric acid dissolves ReFs with the formation of white smoke. Very corrosive to glass. Attacks quartz slightly. Copper is stable to it up to 150°C, Instantly blackened by concentrated HsSO, benzene, acetic acid, paraffin oil, alcohol, ether 3J ld fl.C tOll ... 

Experiment 111 2 Pure uric acid stone powder yielded long plates, whetstones, stars of whetstones and long feathered leaves and swords all crystals were stained blue Blue stained, crystals of other pure uric acid stones appeared in the form of X ... 

Silica interacts with certain insects in a physical way, not related to any biochemical process within the insect, that makes it an insecticide. As any old hen knows, she can control her lice by sitting in the dust, fluffing out her feathers, and working the dust into the skin. Perhaps the powdering of aeventeenth-century wigs served a similar purpose V... 

To do this it is only necessary to sprinkle the surface of the water with a powdered substance having no cohesion with water, and therefore not wetted by it Lycopodium powder is such a substance. Tire powder forms around your hand a true glove, on which the water has no action, any more than it has on the feathers of a live bird. Water runs from it as firom the proverbial duck s back. An even better method is to rub the hand well with the powder instead of sprinkling it on the water. 

In this study, we present the morphology of the different parts of the feather and the chemical technique used to convert poultry feathers to powders or fibers or wool. Then, a suitable molding technique was performed in order to produce highly filled composite samples. The concentration... 

The poultry feathers were obtained from the poultry processing factory in Algeria. From the observation point of view, a feather is constituted of two distinct parts. The central shaft of the poultry feather is composed of a calamus and a rachis. After several washings with ordinary water, the poultry feathers were divided into two batches. The first batch was treated chemically so as to obtain three products Powders (PFcP), Fibers (PFcF) and Wool (PFcW). The second one was processed manually in order to separate the barbs from the rachis. In the paper, the material series are identified as PFrF and Pfc, meaning. Poultry Feather raw Fibers and Poultry Feather Chemically treated respectively. 

The chemical technique used, to convert the raw poultry feathers into useful products, was developed in our laboratory. The process of the transformation is illustrated in the figure 1. The concentration, of the chemical solutions used, is function of the nature and the desired product. Hence, according to the application, the poultry feathers may be converted into useful materials in the form of powder, fibers or wool. 

Composites Unsaturated Polvester/Poultry Feather Products Powder based composite Wool based composite Fibers based composite... 

Fig. 1 Flow sheet representing the processing procedure used to convert raw poultry feathers into useful products (Wool, Fibers and Powder)...

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