The effect of industrial sludge toxicity on the cell growth of a green paramecium, Paramecium bursaria was examined. P. bursaria cells were cultured in a lettuce medium supplemented with various concentrations of sludge suspension at 23 °C under LD (ligh and dark cycle) condition. Results suggested that P. bursaria proliferates normally even at 1.5% sludge suspension. However, 1.5x10 % sludge s...

This thesis presents the design, modeling, implementation, and control of a magnetically suspended reaction sphere with one-axis hysteresis drive (1D-MSRS). The goal of this project is two fold: (a) exploring the design for a reaction sphere in 3D for spacecraft’s attitude control, and (b) studying the performance of the hysteresis motor in reaction wheel applications. The 1D-MSRS is a motor wi...

/*@ public normal_behavior @ requires !isEmpty(); @ ensures \old(queue).has(\result) && @ queue.equals(\old(queue).remove(\result)) && @ (\forall Comparable o; queue.has(o); @ \result.compareTo(o) <= 0); @ modifies queue; @*/ public Comparable removeFirst() { Comparable first = elems[0]; Comparable last = elems[--numElems]; int pos = 0; int child = 1; while (child < numElems) { if (child + 1 < ...

Millions of students are suspended from public school each year in the United States. Critics argue that suspensions infringe upon a student’s right to an education, while schools insist that discipline is necessary to protect the educational rights of every student. Using a unique data set from North Carolina, I estimate an equilibrium model of student behavior, achievement, and suspension tha...

Tidally driven flows, waves, and suspended sediment concentrations were monitored seasonally within a Zostera marina seagrass (eelgrass) meadow located in a shallow (1–2 m depth) coastal bay. Eelgrass meadows were found to reduce velocities approximately 60 % in the summer and 40 % in the winter compared to an adjacent unvegetated site. Additionally, the seagrass meadow served to dampen wave he...

In his monograph “The Erythrocyte and the Action of Simple Hemolysins,” Ponder (1) states that very little satisfactory work has been done on the hemolytic action of acids and alkalies. Reference to Jacobs’ review in Cowdry’s “General Cytology” (2) and to Hober’s and Bayliss’ discussions of hemolysis and the permeability of the red blood cell (3, 4), as well as to the work on hemolysis by Stewa...

introduction: hela cell is a widely studied cell line derived from human cerzix adenocarcinoma. the cells are epithelial - like in morphology and susceptible to polio viruses and adenovirus type 5. hela cells are usually as monolayer for isolation and propagation of some human viruses, as well as for the expression of recombinant proteins, including hepatitis b surface antigen. the aim of this ...