Electrocentrifugal spinning is a recently developed spinning system whose performance is still under investigation by researchers. In this study the process of jet formation in electrocentrifugal spinning is explored and compared to the same process in electrospinning and centrifuge spinning. The results show that the incorporation of the electrical and the centrifugal forces in the electrocent...

During an investigation into the forensic aspects of exfoliative cytology the problem arose of making stained preparations of a few cells in a large volume of protein-free fluid. The method described by Powell (1959), in which the cells are centrifuged on to " evo-stik "-coated rectangular coverslips suffers from two disadvantages. First a special centrifuge head has to be made, and secondly th...

A method to produce platelet-rich plasma and platelet concentrate using a double centrifuge technique in combination with the fibrin adhesive Tisseel is described. This technique constitutes the basic mixture for augmenting and improving an inadequate bone site. Also described is a procedure by which autologous bone or bone substitute is added to this mixture to increase the volume of grafting ...

Acoustically centrifuge and extract cells from blood samples using 152-Y-rotated lithium niobate spiral electrodes with an extraction syringe.

AIMS Exposure to artificial gravity (AG) at different G loads and durations on human centrifuges has been shown to improve orthostatic tolerance in men. However, the effects on women and of an individual-specific AG training protocol on tolerance are not known. METHODS We examined the effects of 90 minutes of AG vs. 90 minutes of supine rest on the orthostatic tolerance limit (OTL), using hea...

INTRODUCTION We examined responses of volunteers with known medical disease to G forces in a centrifuge to evaluate how potential commercial spaceflight participants (SFPs) might tolerate the forces of spaceflight despite significant medical history. METHODS Volunteers were recruited based upon suitability for each of five disease categories (hypertension, cardiovascular disease, diabetes, lu...

The vulnerability of plant water transport tissues to a loss of function by cavitation during water stress is a key indicator of the survival capabilities of plant species during drought. Quantifying this important metric has been greatly advanced by noninvasive techniques that allow embolisms to be viewed directly in the vascular system. Here, we present a new method for evaluating the spatial...