Centrifugal Machine Research Articles

Experimental and embryological studies on the silkworm larvae hatched from the eggs which were treated with high-speed centrifugal machine (Preliminary report)

Experimental and embryological studies on the silkworm larvae hatched from the eggs which were treated with high-speed centrifugal machine (Preliminary report)

鐵鋼中の窒素迅速定量法について(第1報)

The colorimetric determination of nitrogen in steel using Nessler's reagent was studied. The sample was dissolved in acid and oxidized with hydrogen peroxide, iron was precipitated with sodium hydroxide and separated by a centrifugal machine. From this solution the nitrogen was determined colorimetrically using Nessler's reagent. The microquantity of nitrogen in steel below 0.01 percentage can be determined by this method and the time required for this analysis is about 30 minutes, so this method is suited for rapid analysis in the steel plant.

Condition aircraft plant by centrifugal machines

Condition aircraft plant by centrifugal machines

Supersonic Flow in Turbines and Compressors

Whereas a body of theoretical research is available on the conditions of supersonic flow through Laval nozzles and around aerofoils, such is lacking for turbo-machinery in general, with the exception of some researches by Stodola, confined to axial steam turbines. The present paper investigates some important questions relating to the flow at supersonic velocity through centrifugal machines of the general type.

Results of Trial of Molasses as Manure on Swamp Paddy

On the Agricultural Research Station, Aduturai, there was a large quantity of molasses available as a bye-product, in connection with the trials for manufacturing white sugar by the open pan system with centrifugal machine. The trials were conducted during the years 1933-37. Part of it was fed to cattle, but the surplus let over could not be easily disposed of by sale in the locality. So, it was decided to try molasses as a manure on the swamp paddy on the station.

The Concentration of Latex by Centrifugal Machines

Abstract Rubber latex has become a very important raw material and finds many applications, ranging from the proofing of fabrics and impregnation of paper to the manufacture of elastic threads, can-sealing compounds, adhesives, and upholstery. A large amount of research work has been carried out in the East with a view to supplying preserved latex suitable for these processes. The latex as it leaves the tree has an average dry rubber content of about 33 to 35 per cent, and is so unstable that it will coagulate within a few hours unless a preservative is added. Ammonia has been found to be a suitable preservative and, in spite of the continued search for new materials, it remains in general use. The problem of concentrating the latex to avoid the shipment of surplus water arose early. Three methods for carrying out this operation were developed, namely, centrifugal concentration, creaming by the addition of gums and mucilages, and evaporation. A fourth method, utilizing the phenomena of electrodialysis, has recently been the subject of commercial development. The advent of concentrated latex widened the field of latex applications, since the concentrated products found uses for which preserved field latex was not suitable. For many processes the properties and applications of the latex or concentrate are now perhaps more important that the question of shipping cost. Various types of product, described briefly below, are obtained from the different processes of concentration.

Problems and Trends in Centrifugal-Machine Applications

Abstract The paper deals with the factors that govern the design and choice of a centrifugal machine for some specific application so that a prospective user or purchaser may appreciate the scope of the problems involved in the construction of a machine that would meet his requirements. The article describes the various types of machines that are available and specifically calls attention to the newer types of development not generally known. The author surveys the trends in centrifugal-machine development and endeavors to indicate to manufacturers, prospective inventors, developers, and users of these machines the direction in which the art may be extended and expanded by the judicious choice and application of new materials, drives, and methods of construction, as a means of securing maximum production with required safety.

Dextrose in the Food Industries and Its Health Status

Refined dextrose is made by converting highly purified starch with hydrochloric acid. After the conversion, the excess acid is neutralized with sodium carbonate and the neutralized liquor is passed through centrifugal machines, filter presses, and bone char filters to remove all unconverted substances. The clarified liquor is concentrated in triple effect vacuum pans to 300 Be' and again passed over the bone char for further clarification and to remove any dissolved coloring matter. This liquor is then concentrated to

Reconditioning an Old Water Main

During the past year or two considerable thought and study has been given to the transmission lines of the Water Supply System of the City of Newark, with the result that a comprehensive program has been developed to rehabilitate the old steel pipe lines. The first step in this program, which will extend over a period of several years, was the reconditioning of the first five and a half miles of the No. 2 Pequannock pipe line. This line is one of two 48-inch pipe lines which run from the Pequannock watershed to the City of Newark. These lines were laid some forty years ago by the East Jersey Water Company under contract to the City of Newark, and have been in service continuously since that time. The condition of the steel plate was such that it was deemed advisable and economical to recondition them rather than construct a new line. Bids were asked for the cleaning and relining with a J-inch coating of cement mortar placed by centrifugal machine. The contract was awarded to the T. A. Gillespie Company as General Contractors, who in turn sublet the rough cleaning to the National Water Main Cleaning Company. The cleaning consisted of removing the rust tubercles, deposits, remains of the original asphalt lining and other foreign matter from the interior surface of the pipe, to permit a bond between the cement lining and the steel. In order to facilitate cleaning and subsequent operations, the City provided removable sections approximately eight feet long with Dresser Coupling joints at either end of each of the four sections into which the job was divided. In preparing these removable sections the pipe was first burned on an angle allowing the section to be readily removed. In order to use Dresser Couplings on the riveted pipe it was necessary to remove all the rivets in the horizontal lap joints for a distance of 12 inches on one side of the cut and 8 inches on the other. Also, in place of

Cement Lining of Large Diameter Mains in Place by A Centrifugal Machine

Journal AWWAVolume 27, Issue 8 p. 1065-1072 Article Cement Lining of Large Diameter Mains in Place by A Centrifugal Machine Elson T. Killan, Elson T. Killan Associate with Alexander Potter, Consulting Engineer, New York, N. Y.Search for more papers by this author Elson T. Killan, Elson T. Killan Associate with Alexander Potter, Consulting Engineer, New York, N. Y.Search for more papers by this author First published: 01 August 1935 https://doi.org/10.1002/j.1551-8833.1935.tb18489.xAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Volume27, Issue8August 1935Pages 1065-1072 RelatedInformation

Separation and Purification of Liquids by Centrifugation, with Special Reference to Petroleum

Centrifugal force has been used for centuries for separating liquids butmachines for doing this are a comparatively recent development. The use ofthese machines is being extended into many industries but this paper isconfined to their use in the oil industry. The centrifugal machine is found atthe well where ?cut oil? is dehydrated for acceptance by pipe lines; and in therefinery and byproduct plant. In fact, wherever finely divided suspendedparticles should be removed from an oil, there is a possible use for acentrifugal machine, if the particles have, or can be made to have, a specificgravity different from that of the oil. Centrifugal machines are also used forcleaning fuel and lubricating oils and dehydrating transformer oils. Applications and Results When oil comes from the well mixed with water, it is spoken of as cut oil.Settling often does not remove sufficient water for the oil to be accepted bypipe lines, thus necessitating chemical or other treatment. Centrifuging alone, or following chemical treatment, effectively prepares such oil for pipe lines, as is shown by the following data: On the Oklahoma lease, the machine was cleaned of solid material once in 12hr. At first, it was thought that chemical treatment was necessary to startseparation and 1 qt. of prepared compound was added to each 100 bbl. of the cutoil before centrifuging. AIME 070–59

Artificial mother's milk for feeding newborns

We are talking about cow's milk, processed according to the Gaertner's method mechanically using a centrifugal machine. The composition of the milk obtained is close to the natural female.

The Operation of Centrifugal Machines

The Operation of Centrifugal Machines

Note on the efficiency of centrifugal machines for the separation of cream from milk

The first page of this article is displayed as the abstract.