A study on osmotic resistance of RBC and ESR in stored blood

The present work was undertaken to study the changes in osmotic resistance of stored blood, used for blood transfusion. Blood samples of 50 cases from Orissa Red Cross Blood Bank, Cuttack, were studied. The blood was collected in acid citrate dextrose solution and stored at 4 degrees C. Storage was done under usual condition followed in blood banks. Osmotic fragility was determined at 3 days interval up to 15 days. In each case ESR was determined and in 20 cases plasma fibrinogen level was determined. In this study there was gradual increase in fragility which was maximum on 9th day and then slowly declined, which was statistically significant. ESR decreased markedly after 6th day, which was also statistically significant.     

In vitro hydrolysis of plant protein concentrate with papain

A method was tested for measuring in vitro papain proteolysis of extracted plant protein to products soluble in trichloroacetic acid. The effects of incubation time, temperature and enzyme concentration were examined. Maximum proteolysis (82.9%) was obtained at 70°C for 24 h and a ratio of papain/protein substrate of approximately 1:10.     

Nonparallelability Constraints in Assembly Lines with Overlapping Work Stations

This paper presents algorithms for designing assembly lines with overlapping work stations where technological limitations may restrict simultaneous performance of certain work elements on the same copy of a product. Computational procedures for the handling of these physical constraints are developed, utilizing techniques from disjunctive graph theory and illustrated with sample problems.     

A heuristic approach to the generation of tests for faults on the intermediate lines

The paper deals with the study of test generation mechanisms for faults on the intermediate lines using Boolean matrices. The proposed technique is a novel approach to the problem and also aims at deriving the results heuristically, thus saving computational effort. The technique has been illustrated by suitable examples.     

Effect of pressure on melting temperature and other associated thermodynamic functions of polyethylene

The melting temperature of polyethylene was determined at pressures up to 30 kbar. Using these results and the calculated values of the volume change on melting in the Clausius–Clapeyron equation, the enthalpy and entropy of fusion as a function of pressure were also determined.     

DRYINC RATES DURING HIGH TEMPERATURE DRYING OF YELLOW POPLAR

Experimental drying rates during high temperature drying of Yellow Poplar is analyzed to determine types of drying mechanism. Drying rate during the constant rate period and effective diffusivity during the falling rate periods were obtained at dryer temperatures ranging from 100°C to 150°C.

The drying curve shows three drying regimes: a constant-rate period, and two falling rate periods. The constant rate period, where the drying rate is a linear function of time, is controlled by the rate of heat transfer to the wood surface. Both falling rate periods show a drying rate which is a linear function of the square root of time. Floisture migration during the first falling rate is by simultaneous capillary action and liquid diffusion. while moisture'migration takes place by vapor diffusion during the second falling rate period. This occurs when the moisture content of the wood falls below the fiber saturation point. The effective diffusion coefficient during both periods is found to be constant.     

Delay analysis of selective-repeat ARQ with applications to link adaptation in wireless packet data systems

Radio link control (RLC) protocols are typically employed for reliable in-sequence delivery of service data units (SDUs) in wireless packet data systems. The RLC layer segments packets obtained from the upper layer (referred to as SDUs) into smaller RLC transmission units (or blocks) and uses selective-repeat automatic repeat request (SR-ARQ) for error recovery of RLC blocks. In earlier work, SR-ARQ performance is typically characterized in terms of the long-term throughput or in-sequence delivery delay of RLC blocks. The SDU delivery delay which is a more meaningful measure of RLC performance (in terms of the service provided to a higher layer, e.g., transmission control protocol) has not been quantified. In this paper, we analyze the SDU delivery delay of SR-ARQ as a function of the SDU size and the channel coding scheme employed. Closed-form delay expressions as well as approximations are provided. The analysis is verified through enhanced general packet radio service RLC simulations. Based on the analysis, we propose that link adaptation be backlog dependent in order to reduce the SDU delivery delay at the RLC layer.