Design, fabrication, and performance evaluation of a concave lens array on an aspheric curved surface.

A microlens array (MLA) is a fundamental optical element, which has been widely applied in the fields of imaging sensing, 3D display, and lighting source. However, it is still a challenge to design the MLAs simultaneously satisfying small size, wide field of view, and high image quality. Herein, a novel type of concave lens array on an aspheric convex substrate (CLAACs) is presented, which is composed of an aspheric substrate and a spherical concave subeye array.

Selective serotonin reuptake inhibitors combined with traditional Chinese medicine for premature ejaculation: A systematic review and meta-analysis.

Background: Premature ejaculation (PE) is still a tough problem in drug treatment. Many clinical trials have proven that traditional Chinese medicine (TCM) has a significant effect in the treatment of PE. This article aims to provide the latest evidence for the efficacy and safety of TCM combined with selective serotonin reuptake inhibitors (SSRIs) in the treatment of PE.

Solvothermal preparation of spherical BiO nanoparticles uniformly distributed on TiCT for enhanced capacitive performance.

TiCT is a promising new two-dimensional layered material for supercapacitors with good electrical conductivity and chemical stability. However, TiCT has problems such as collapse of the layered structure and low pseudocapacitance. In this paper, we propose BiO-TiCT nanocomposites prepared by a solvothermal method, study the impact of BiO loading on the phase state and microstructure, and evaluate the electrochemical performance of BiO-TiCT .

The Clinical Efficacy of Percutaneous Nephrolithotomy and Flexible Ureteroscopic Lithotripsy in the Treatment of Calyceal Diverticulum Stones: A Meta-Analysis.

Background: The clinical efficacy of percutaneous nephrolithotomy (PCNL) and flexible ureteroscopic lithotripsy (FURL) in the treatment of calyceal diverticulum stones (CDs) remains controversial. We performed a meta-analysis to assess the clinical efficacy of PCNL and FURL in the treatment of CDs.

Methods: We searched a number of relevant electronic databases including China National Knowledge Infrastructure (CNKI), MEDLINE, PubMed, Web of Science, EMBASE, and Cochrane Library until January 31, 2022.

Perineural invasion detected in prostate biopsy is a predictor of positive surgical margin of radical prostatectomy specimen: A meta-analysis.

The role of perineural invasion detected by puncture biopsy of prostate cancer remains controversial. We performed a meta-analysis to assess the relationship between positive perineural invasion at prostate biopsy and positive surgical margins (PSM) after radical prostatectomy. We searched a number of relevant electronic databases including Web of Science, Medline, PubMed, Embase, and the Cochrane Library until 31 March 2021.

Efficacy of fasudil for the treatment of aneurysmal subarachnoid hemorrhage: A systematic review protocol of randomized controlled trial.

Background: This study aims to systematically assess the efficacy and safety of fasudil for the treatment of aneurysmal subarachnoid hemorrhage (ASH).

Methods: This study will include all of randomized controlled trials on the efficacy and safety of fasudil for the treatment of ASH. Ten electronic databases of PubMed, Embase, Cochrane Library, Google Scholar, Web of Science, Ovid, Cumulative Index to Nursing and Allied Health Literature, Allied and Complementary Medicine Database, Chinese Biomedical Literature Database, and China National Knowledge Infrastructure will be searched from inception to the May 1, 2019 without language restrictions.

In Situ Image Acquisition and Measurement of Microdroplets Based on Delay Triggering.

An in situ image acquisition apparatus based on delay triggering for visualizing microdroplets formation is described. The imaging system includes a charge-coupled device camera, a motion control card, a driving circuit, a time delay triggering circuit, and a light source. By adjusting the varying trigger delay time which is synchronized with respect to the signal for jetting, the steady sequential images of the droplet flying in free space can be captured real-time by the system.

Different roles of crayfish hemocytes in the uptake of foreign particles.

Crustacean hemocytes are known to remove invading pathogens by phagocytosis. In this study, we investigated how the semigranular cells (SGCs) and granular cells (GCs) of crayfish Cherax quadricarinatus participated in this process. By injecting the animals with excessive amounts of fluorescent microspheres (FMs), we showed that only a small portion of the circulating hemocytes were phagocytic cells, and they took up FMs in a size-dependent manner.

Replication of thermoplastic polymer spherical lens array using microforged molding technique.

In this paper, we propose a replication method of thermoplastic polymer spherical lens array using a novel microforged mold. The SiN ceramic balls, with 3.5 mm diameter, 10 nm surface roughness and 84 nm deviation from spherical profile, were utilized as indentor to generate aluminum alloy lens array mold.

Ultrasound-mediated microbubble destruction enhances the therapeutic effect of intracoronary transplantation of bone marrow stem cells on myocardial infarction.

Objective: The combination of intracoronary transplantation and ultrasound-mediated microbubble destruction may promote effective and accurate delivery of bone marrow stem cells (BMSCs) into the infarct zone. To test this hypothesis in this study we examined the effectiveness of ultrasound-mediated microbubble destruction in combination with intracoronary transplantation of BMSCs for the treatment of myocardial infarction in canine model of acute myocardial infarction.

Method: The dogs were randomly assigned to four groups: PBS, ultrasound-mediated microbubble destruction, BMSCs, BMSCs together with ultrasound-mediated microbubble destruction.

Rapid fabrication of thermoplastic polymer refractive microlens array using contactless hot embossing technology.

A thermoplastic polymer refractive microlens array has been rapidly fabricated by contactless hot embossing technology through the stainless steel template with micro through-holes array, which has a diameter of 150 µm and a pitch of 185 µm. By optimizing the technical parameters including heating and demoulding temperature, loading pressure, loading and pressure holding time, a series of high quality microlenses arrays of different sags could be obtained. In addition, the sag and the radius of curvature of the microlens are controllable.

Noncontact microembossing technology for fabricating thermoplastic optical polymer microlens array sheets.

Thermoplastic optical polymers have replaced traditional optical glass for many applications, due to their superior optical performance, mechanical characteristics, low cost, and efficient production process. This paper investigates noncontact microembossing technology used for producing microlens arrays made out of PMMA (polymethyl methacrylate), PS (polyStyrene), and PC (polycarbonate) from a quartz mold, with microhole arrays. An array of planoconvex microlenses are formed because of surface tension caused by applying pressure to the edge of a hole at a certain glass transition temperature.