HEPARIN INDUCED THROMBOCYTOPENIA AND HEMODIALYSIS

Unfractionated heparin is the most commonly used anticoagulant for hemodialysis (HD).  It is well-known that heparin can cause immune-mediated thrombocytopenia due to immunoglobulin antibody formation against the complex of platelet factor 4 (PF4) and heparin. Heparin may also contribute to HD-associated platelet activation, thrombocytopenia, and increased PF4 release from platelets during a heparin dialytic session. The present study was conducted to study the effect of unfraction heparin as anticoagulant in newly treatment hemodialysis patients. Material and method: A sample of 72 people were selected, 32 patients on dialysis for first time from unite of kidney dialysis. At the same time a group of 40 randomly selected healthy adults to participate in the study as control. By Automated cell counter (sysmex X 21) platelets from all patients on dialysis before starting heparin and after one month later were estimated. Result: The mean value of platelets in patients after treated with heparin was significant lower (192.3 ± 20.7 ) — 109/l as compare before treated with heparin 203 ± 20.7 — 109/l  ( P = 0.001). Conclusion: From this study, heparin as anti-coagulant has effect on decrease platelets count but still patients have no thrombocytopenia platelets level 150 — 109/l.

HEPARIN INDUCED THROMBOCYTOPENIA AND HEMODIALYSIS

Unfractionated heparin is the most commonly used anticoagulant for hemodialysis (HD).  It is well-known that heparin can cause immune-mediated thrombocytopenia due to immunoglobulin antibody formation against the complex of platelet factor 4 (PF4) and heparin. Heparin may also contribute to HD-associated platelet activation, thrombocytopenia, and increased PF4 release from platelets during a heparin dialytic session. The present study was conducted to study the effect of unfraction heparin as anticoagulant in newly treatment hemodialysis patients. Material and method: A sample of 72 people were selected, 32 patients on dialysis for first time from unite of kidney dialysis. At the same time a group of 40 randomly selected healthy adults to participate in the study as control. By Automated cell counter (sysmex X 21) platelets from all patients on dialysis before starting heparin and after one month later were estimated. Result: The mean value of platelets in patients after treated with heparin was significant lower (192.3 ± 20.7 ) — 109/l as compare before treated with heparin 203 ± 20.7 — 109/l  ( P = 0.001). Conclusion: From this study, heparin as anti-coagulant has effect on decrease platelets count but still patients have no thrombocytopenia platelets level 150 — 109/l.

On the Susceptibility of Micro-controller to Radio Frequency Interference

International audienceElectromagnetic compatibility (EMC) has recently focused more attention on Integrated Circuits (ICs). This work deals with immunity of micro-controllers to Radio Frequency Interference (RFI). The susceptibility test methods are reviewed, the test bench setup in our labs is presented, and some aspects of defensive software are detailed

A Systematic Design of a Compact Wideband Hybrid Directional Coupler Based on Printed RGW Technology

Printed ridge gap waveguide (PRGW) is considered among the state of art guiding technologies due to its low signal distortion and low loss at Millimeter Wave (mmWave) spectrum, which motivates the research community to use this guiding structure as a host technology for various passive microwave and mmWave components. One of the most important passive components used in antenna beam-switching networks is the quadrature hybrid directional coupler providing signal power division with 90° phase shift. A featured design of a broadband and compact PRGW hybrid coupler is propose in this paper. A novel design methodology, based on mode analysis, is introduced to design the objective coupler. The proposed design is suitable for mmWave applications with small electrical dimensions ( 1.2λo×1.2λo ), low loss, and wide bandwidth. The proposed hybrid coupler is fabricated on Roger/RT 6002 substrate material of thickness 0.762 mm. The measured results highlight that the coupler can provide a good return loss with a bandwidth of 26.5% at 30 GHz and isolation beyond 15 dB. The measured phase difference between the coupler output ports is equal 90∘± 5∘ through the interested operating bandwidth. A clear agreement between the simulated and the measured results over the assigned operating bandwidth has been illustrated

Polypropylene Composites Reinforced by Marine Posidonia Fiber Waste: Effect of Silane and Alkali treatment

This paper investigates the effects of chemical treatment and the reinforcement rate on the mechanical properties of polypropylene composites reinforced with Posidonia waste fibers. Increasing the reinforcement rate from 20% to 30% improved Young’s modulus and the flexural modulus of the composite. Silane treatment had a positive effect on all the mechanical properties of the composite; on the other hand, the alkali treatment improved the tensile strength but decreased the flexural property of the composite. The greatest Young’s and flexural moduli were obtained in the case of 30% reinforcement treated with silane. The increases in these properties were 57.95% and 44.84% for the tensile and flexural moduli, respectively, compared to pure polypropylene. The mechanical properties of the composite obtained were higher than those of hemp and jute produced under the same conditions using the single-screw extrusion process. The results show that Posidonia waste fiber is an effective candidate to be utilized to produce composites for the automotive industry, such as rear shelves, boot linings, spare wheel compartments, and interior doors, and that it has economic and ecologic advantages in comparison with hemp and jute fibers

1-Phenyl­piperazine-1,4-diium bis­(hydrogen sulfate)

In the title compound, C10H16N2 2+·2HSO4 −, the S atoms adopt slightly distorted tetra­hedral geometry and the diprotonated piperazine ring adopts a chair conformation. In the crystal, the 1-phenyl­piperazine-1,4-diium cations are anchored between chains formed by the sulfate entities via inter­molecular bifurcated N—H⋯(O,O) and weak C—H⋯O hydrogen bonds. These hydrogen bonds contribute to the cohesion and stability of the network of the crystal structure

4-Meth­oxy­anilinium nitrate

The title compound, C7H10NO+·NO3 −, crystallized with two p-ansidinium cations and two nitrate anions in the asymmetric unit. As well as Columbic and van der Waals forces, moleucles inter­act via multiple bifurcated N—H⋯O hydrogen bonds that help consolidate the crystal packing, resulting in a three-dimensional network