We describe the development of a handheld stamp for the production of microfluidic paper-based analytical devices. The paper surface was oxidized for allowing the covalent coupling of enzymes. The chemical modification led to improvements on the color uniformity. The relative standard deviation values for glucose and uric acid assays decreased from 40 to 10% and from 20 to 8%, respectively. The...

Anisotropic ratchet conveyors (ARCs) are a recently developed microfluidic platform that transports liquid droplets through a passive, microfabricated surface pattern and applied orthogonal vibrations. In this work, three new functionalities are presented for controlling droplet transport on the ARC system. These devices can pause droplet transport (ARC gate), decide between two pathways of dro...

Since their introduction in 2001, SiNW-based sensor devices have attracted considerable interest as a general platform for ultra-sensitive, electrical detection of biological and chemical species. Most studies focus on detecting, sensing and monitoring analytes in aqueous solution, but the number of studies on sensing gases and vapors using SiNW-based devices is increasing. This review gives an...

Abstract In order to accurately assess the performance of man-portable devices, a method evaluating devices based on cloud center gravity evaluation is proposed. Firstly, index system was constructed by analyzing factors affecting devices. Then, using judgment method, device model established and weighted deviation applied determine results. Finally, examples, we verify feasibility effectivenes...

Medical devices are responsible for a large portion of nosocomial infections, particularly in critically ill patients. Device-associated infections can cause major medical and economic sequelae. Bacterial colonization of the indwelling device can be a prelude to both infection and malfunction of the device. The pathogenesis of device-associated infection centers around the multifaceted interact...

acute fulminant myocarditis is a life-threatening inflammatory disease of the myocardium characterized by the rapid deterioration of the hemodynamic status of the affected individual. with prompt recognition and appropriate management, complete recovery of ventricular function is likely within a few weeks. we introduce a 28-year-old man with acute fulminant myocarditis, who experienced circulat...

background : iud is one of the safest and most widely used reversible methods of contraception. the purpose of this study was to determine iud survival and reasons for early discontinuation in bandar abbas, south of iran. methods: probability of iud continuation rate and factors associated with discontinuation were assessed in a historical cohort study of 400 women records from march 2002 to fe...

In this article we examine four objections to the genetic modification of human beings: the freedom argument, the giftedness argument, the authenticity argument, and the uniqueness argument. We then demonstrate that each of these arguments against genetic modification assumes a strong version of genetic determinism. Since these strong deterministic assumptions are false, the arguments against g...

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Thermoplastics have become attractive alternatives to glass/quartz for microfluidics, but the realization of thermoplastic nanofluidic devices has been slow in spite of the rather simple fabrication techniques that can be used to produce these devices. This slow transition has in part been attributed to insufficient understanding of surface charge effects on the transport properties of single m...