Graphical Relationships Research Articles

Quantitative nutritional studies with water-soluble, chemically defined diets. IX. Further studies on d-glucosamine-containing diets

The effect of incorporating d-glucosamine at various levels into the water-soluble, chemically defined diet No. 26 fed ad libitum to rats has been compared with that observed earlier under the same conditions when the inferior diet No. 3 was employed. As before, a linear graphical relationship between growth and food intake was observed which, by extrapolation, permitted a calculation of the average daily requirement of food for the maintenance of body weight over the entire course of the experiment. On the superior diet, No. 26, there was ( a) a slightly higher maintenance requirement, and ( b) appreciably less depression in the growth rate at equal levels of glucosamine, than on diet No. 3. No toxic symptoms were evident, and it is apparent that the dietary glucosamine simply exerts a self-limiting effect on food intake. Force-feeding of diet No. 26 containing 8 and 12% of glucosamine to rats bearing the transplanted Walker tumor resulted in no symptoms of toxicity nor any effect upon tumor or carcass growth. Observations on the cyclic daily weight fluctuations of animals ingesting soluble diets as compared with Purina Chow are described.

Application of Laboratory Data in Calculating the Primary Production History of the Cisco K-1 Reservoir

Abstract The purpose of this work is to show application of laboratory data in calculating solution gas-drive performance of the Cisco K–1 reservoir. Included herein is a diagram showing the graphical relationship between six variables common to all solution gas-drive mechanisms. With an iterative process one may assume existence of any of these six variables at a particular pressure and calculate the production performance likely to occur in a reservoir produced by solution gas drive. Four unique pressure values are described at which the material balance equation alone is sufficient to predict the cumulative volumes of gas produced. Information derived from these pressure points establishes a criterion for determining compatibility of the pressure-volume-temperature (PVT) analysis of the produced crude with the gas production history. Two averaging procedures are used to arrive at a relative permeability-saturation relationship which describes the field-wide performance. Introduction The Cisco K–1 reservoir is a lenticular-type sand structure lying at approximately 6,300-ft subsurface. It is located in the H. and T. C. Railroad Co. Block 97, SW 1/4 S 392 and NW 1/4 S 385, Scurry County, Tex. Correlation of data from logs indicated that the Cisco K–1 reservoir occupied approximately 2,390 acre-ft of space with a closure of from 15 to 20 ft. Analysis of the production data indicates that the initial formation pressure and temperature were 2,450 psig and 121F, respectively. The bubble point occurred at 1,715 psig after production of 12,256 STB oil and 11,520 Mcf gas. Only traces of water have been produced since initiation of production. Successive material balance calculations from June, 1952, to June, 1957, showed that no initial gas cap or water influx has contributed to production of oil and that the Cisco K–1 reservoir originally contained approximately 1.44 X 10(6) STB of oil.

Graphical Relationships in Cloth Geometry for Plain, Twill, and Sateen Weaves

In the seventeen years since the publication of F. T. Peirce's "The Geometry of Cloth Structure" [1], many textile engineers have checked the assumptions upon which the geo metric theory is based. Their findings have reflected favorably on Peirce's physical and analytical reasoning. In many cases it was found advisable to extend the original geometric relationships to include woven structures other than those dealt with explicitly in Peirce's writings. The following paper by Mr. Louis Love serves as a useful extension of Peirce's consideration of the maximum weavability of plain weaves. Based on his own observations of fabric cross sections, Love establishes lateral compression factors for other than plain weaves. He combines these with appropriate weave factors to arrive at graphical relation ships for maximum weavability—presented here in a form of immediate use to the mill designer. Following Mr. Love's paper, Dr. John Dickson reports on numerous loom tests which serve to illustrate the validity of Love's assumptions, analyses, and computations. It is worth noting that Dickson's experimental data relate to cotton and to other fibers as well. His calculations demonstrate the direct manner of converting from one yarn count system to another, taking into consideration variations in fiber density. The need for such conver sions arises from the use of cotton system cover factors in most published studies of cloth geometry. EDITOR