operating parameters and membrane characteristics strongly affect the performance of electrodialysis reversal systems. the most impactful factors are applied voltage, flow rate, temperature, initial feed composition, and ion exchange membrane characteristics; the ph of the feed also has an effect, although to a lesser extent. to determine more precisely how all of these factors impact performan...

Wigner’s little groups are the subgroups of the Lorentz group whose transformations leave the momentum of a given particle invariant. They thus define the internal space-time symmetries of relativistic particles. These symmetries take different mathematical forms for massive and for massless particles. However, it is shown possible to construct one unified representation using a graphical descr...

Severe hypoglycemia characterized by neuroglycopenic symptoms is a recently described and relatively uncommon complication of gastric bypass surgery. It occurs several months to years after surgery and may be distinct from the more commonly encountered dumping syndrome that occurs early in the postoperative course and usually improves with time. Nesidioblastosis has been proposed as a possible ...

The midface of youth is a full, vertically well-supported structure. Aging brings deflation of the midface associated with vertical descent. Reversal of this volume loss with fat grafting or other fillers has become a major recognized goal of aesthetic surgeons today. Fat grafting in reconstructive surgery is not a new concept. Excellent results may be achieved in most reconstructive and cosmet...

The discussion considers the current status of reversibility of sterilization in the US and describes clinical and experimental efforts for developing techniques designed for reversibility. It focuses on regret following sterilization, reversal potential of current sterilization techniques, patient selection, current reversal techniques, results of sterilization procedures, experimental approa...

Let S be a subset of the positive integers, and let σ be a permutation of S. We say that σ is a k-avoiding permutation of S if σ does not contain any k-term AP as a subsequence. Similarly, the set S is said to be k-avoidable if there exists a k-avoiding permutation of S.

Severe hypoglycemia characterized by neuroglycopenic symptoms is a recently described and relatively uncommon complication of gastric bypass surgery. It occurs several months to years after surgery and may be distinct from the more commonly encountered dumping syndrome that occurs early in the postoperative course and usually improves with time. Nesidioblastosis has been proposed as a possible ...

The oral anticoagulant dabigatran etexilate can be a challenge when patients need acute surgery. Sepsis and acute renal failure exacerbate the anticoagulant effect. There is no specific reversal agent for dabigatran etexilate, but it can be removed by hemodialysis. We present a case where a patient treated with dabigatran etexilate was admitted to intensive care unit with severe sepsis and acut...

Severe hypoglycemia characterized by neuroglycopenic symptoms is a recently described and relatively uncommon complication of gastric bypass surgery. It occurs several months to years after surgery and may be distinct from the more commonly encountered dumping syndrome that occurs early in the postoperative course and usually improves with time. Nesidioblastosis has been proposed as a possible ...