The losses in fruits and vegetables in various postharvest operations remained high in which tomato is one of the major vegetable fruit. Tomato is a sensitive vegetable whose quality is substantially reduces due to physical damage encountered by various mechanical forces in harvesting, handling and other postharvest operation. In this study an attempt was made to determine mechanical properties...

1. A technique has been devised to measure the effect of stimulation frequency on the contraction force in an accessory muscle of respiration, the sternomastoid, in man. The frequency/force curve was found to be very similar to that of the quadriceps and adductor pollicis muscles. 2. Fatigue of the sternomastoid due to inspiratory loading or sustained maximum voluntary ventilation resulted in r...

Tensile testing of repaired tendons has been used to assess the efficacy of repair techniques. However, individuals flex and extend fingers at rates higher than those typically used for testing. This study characterized the effect of loading rate on the failure strength of repaired canine flexor tendons. Thirty-six canine flexor digitorum profundus tendons were lacerated, repaired, and tested a...

The effect of cyclopropane on contractile performance of papillary muscles obtained from cats with congestive heart failure induced by pulmonary artery constriction was studied and compared with non-operated normal animals. A significant depression of contractile performance in the papillary muscles of cats with congestive heart failure was observed along with elevated right ventricular pressur...

Stiction failures in microelectromechanical systems (MEMS) occur when suspended elastic members are unexpectedly pinned to their substrates. This type of device failure develops both in fabrication and during device operation, being a dominant source of yield loss in MEMS. Stiction failures require first a collapse force that brings the elastic member contact with the substrate followed by an i...

The new inotropic agent pren lte 01 was admini te in a canine model of acute ischemic heart failure d int and in venously patients witn severe chronic heart failure. Experimental heart failure in anesthetized dogs was induced by two vessel coronary artery constriction and intravenous prenalterol (0.005-15 ug/kg/min) was compared to dobutamine (0.001-30 ug/kg/min) and saline. Significant dose-de...

This paper describes statistical determination of fretting-induced failure of an electro-deposited coating. A fretting test is conducted using a ball-on-flat plate configuration. During a test, a frictional force is measured, along with the relative displacement between an AISI52100 ball and a coated flat specimen. Measured data are analyzed with statistical process control tools; a frictional ...