- Evaluation of Automatic Monitoring of Instillation Adherence Using Eye Dropper Bottle Sensor and Deep Learning in Patients With Glaucoma. [Journal Article]
- TVTransl Vis Sci Technol 2019; 8(3):55
- CONCLUSIONS: The eye dropper bottle sensor system developed by us can be used for automatic monitoring of instillation adherence in patients with glaucoma.
- Weakly charged droplets fundamentally change impact dynamics on flat surfaces. [Journal Article]
- SMSoft Matter 2019 Jun 13
- Electric charges are often found in naturally or artificially formed droplets, such as raindrops and those generated by Kelvin's water dropper. In contrast to the impact of neutral droplets on a flat…
Electric charges are often found in naturally or artificially formed droplets, such as raindrops and those generated by Kelvin's water dropper. In contrast to the impact of neutral droplets on a flat solid surface upon which a thin convex lens shape layer of the gas film is typically formed, we show that the delicate gas thin film can be fundamentally altered for even weakly charged droplets. As the charge level is raised above a critical level of ∼1% of the Rayleigh limit for representative impact conditions, the Maxwell stress overcomes the gas pressure buildup to deform the droplet bottom surface. A conical liquid tip forms and pierces through the gas film, leading to a circular contact line moving outwards that does not trap any gas. The critical charge level only depends on the capillary number based on the gas viscosity. This finding applies to common liquids and molten alloy droplets, providing new insights into a range of applications such as mitigating pinhole defects in additive manufacturing.
- Sample seal-and-drop device and methodology for high temperature oxide melt solution calorimetric measurements of PuO2. [Journal Article]
- RSRev Sci Instrum 2019; 90(4):044101
- Thermodynamic properties of refractory materials, such as standard enthalpy of formation, heat content, and enthalpy of reaction, can be measured by high temperature calorimetry. In such experiments,…
Thermodynamic properties of refractory materials, such as standard enthalpy of formation, heat content, and enthalpy of reaction, can be measured by high temperature calorimetry. In such experiments, a small sample pellet is dropped from room temperature into a calorimeter operating at high temperature (often 700 °C) with or without a molten salt solvent present in an inert crucible in the calorimeter chamber. However, for hazardous (radioactive, toxic, etc.) and/or air-sensitive (hygroscopic, sensitive to oxygen, pyrophoric, etc.) samples, it is necessary to utilize a sealed device to encapsulate and isolate the samples, crucibles, and solvent under a controlled atmosphere in order to prevent the materials from reactions and/or protect the personnel from hazardous exposure during the calorimetric experiments. We have developed a sample seal-and-drop device (calorimetric dropper) that can be readily installed onto the dropping tube of a calorimeter such as the Setaram AlexSYS Calvet-type high temperature calorimeter to fulfill two functions: (i) load hazardous or air-sensitive samples in an air-tight, sealed container and (ii) drop the samples into the calorimeter chamber using an "off-then-on" mechanism. As a case study, we used the calorimetric dropper for measurements of the enthalpy of drop solution of PuO2 in molten sodium molybdate (3Na2O·4MoO3) solvent at 700 °C. The obtained enthalpy of -52.21 ± 3.68 kJ/mol is consistent with the energetic systematics of other actinide oxides (UO2, ThO2, and NpO2). This capability has thus laid the foundation for thermodynamic studies of other Pu-bearing phases in the future.
- Application via mechanical dropper alleviates sufentanil-induced cough: a prospective, randomized, single-blinded trial. [Journal Article]
- TTrials 2019 Mar 15; 20(1):170
- CONCLUSIONS: Sufentanil application via mechanical dropper can significantly alleviate the occurrence of SIC during the induction phase of total intravenous general anesthesia. This method is simple, safe, and reliable, and has wide prospective application for clinical use.
- Tramadol for the treatment of catheter-related bladder discomfort: a randomized controlled trial. [Journal Article]
- BABMC Anesthesiol 2018 12 20; 18(1):194
- CONCLUSIONS: Tramadol 1.5 mg/kg was more effective than tramadol 1 mg/kg in treating CRBD and reducing postoperative pain, without significant side effects.
- Validation of Biomode S.A. Probe4CronobacterTM for the Identification of Cronobacter spp. [Journal Article]
- JAJ AOAC Int 2019 May 01; 102(3):855-864
- CONCLUSIONS: Probe4Cronobacter test kit has shown to be a accurate, highly sensitive and robust methods for the detection of Cronobacter spp. in PIF samples.
- Electrowetting Using a Microfluidic Kelvin Water Dropper. [Journal Article]
- MMicromachines (Basel) 2018 Feb 25; 9(3)
- The Kelvin water dropper is an electrostatic generator that can generate high voltage electricity through water dripping. A conventional Kelvin water dropper converts the gravitational potential ener…
The Kelvin water dropper is an electrostatic generator that can generate high voltage electricity through water dripping. A conventional Kelvin water dropper converts the gravitational potential energy of water into electricity. Due to its low current output, Kelvin water droppers can only be used in limited cases that demand high voltage. In the present study, microfluidic Kelvin water droppers (MKWDs) were built in house to demonstrate a low-cost but accurately controlled miniature device for high voltage generation. The performance of the MKWDs was characterized using different channel diameters and flow rates. The best performed MKWD was then used to conduct experiments of the electrowetting of liquid on dielectric surfaces. Electrowetting is a process that has been widely used in manipulating the wetting properties of a surface using an external electric field. Usually electrowetting requires an expensive DC power supply that outputs high voltage. However, in this research, it was demonstrated that electrowetting can be conducted by simply using an MKWD. Additionally, an analytic model was developed to simulate the electrowetting process. Finally, the model's ability to well predict the liquid deformation during electrowetting using MKWDs was validated.
- A multi-species powder dropper for magnetic fusion applications. [Journal Article]
- RSRev Sci Instrum 2018; 89(10):10K121
- We present a device for controlled injection of a variety of materials in powder form. The system implements four independent feeder units, arranged to share a single vertical drop tube. Each unit co…
We present a device for controlled injection of a variety of materials in powder form. The system implements four independent feeder units, arranged to share a single vertical drop tube. Each unit consists of a 80 ml reservoir, coupled to a horizontal linear trough, where a layer of powder is advanced by piezo-electric agitation at a speed proportional to the applied voltage, until it falls into a drop tube. The dropper has been tested with a number of impurities of low (B, BN, C), intermediate (Si, SiC), and high Z (Sn) and a variety of microscopic structures (flakes, spheres, rocks) and sizes (5-200 μm). For low Z materials, drop rates ∼2-200 mg/s have been obtained showing good repeatability and uniformity. A calibrated light-emitting diode (LED)-based flowmeter allows measuring and monitoring the drop rate during operation. The fast time-response of the four feeders allows combination of steady and pulsed injections, providing a flexible tool for controlled-dose, real-time impurity injection in fusion plasmas.
- The Effects of Inhalation Aromatherapy with Rose and Lavender at Week 38 and Postpartum Period on Postpartum Depression in High-risk Women Referred to Selected Health Centers of Yazd, Iran in 2015. [Journal Article]
- IJIran J Nurs Midwifery Res 2018 Sep-Oct; 23(5):395-401
- CONCLUSIONS: This study provides valid evidence for the effect of aromatherapy on PPD. Therefore, the use of aromatherapy can be recommended in high.
New Search Next
- Production and characterization of drug-loaded toroidal vortices from a novel ocular drug delivery device. [Journal Article]
- DDDrug Deliv Transl Res 2018; 8(5):1139-1151
- For the last several decades, the predominant method for delivering medicine to the surface of the eye has been the standard multiuse eye dropper. While being the most popular, this method has signif…
For the last several decades, the predominant method for delivering medicine to the surface of the eye has been the standard multiuse eye dropper. While being the most popular, this method has significant limitations. Recently, an effort has been made to explore the use of a directed toroidal vortex or "smoke ring" aerosol delivery system that may help overcome these limitations and enable delivery of precise amounts of formulation and drug to the ocular surface. Promising preliminary in vitro studies indicated dosing control, but the physical characteristics of the toriodal aerosol device performance and impaction forces related to patient comfort have yet to be established. Here, we experimentally investigate the mechanics and dynamics of these ocular aerosol vortices, including translational and rotational velocities, spatial droplet size distributions, and relative impaction forces in order to optimize the device performance and evaluate potential for clinical use. Maximal droplet velocity at various actuation forces was determined, and they were found to be all less than 6 m/s even at the highest actuation forces. Moreover, plume impaction forces were determined across a range of conditions and were all less than about 4.5 μN. Collectively, these studies showed that the physical and mechanical properties of the emitted drug-loaded vortices would be suitable for ocular administration.