External pumped all-optical microfiber modulator based on reduced graphene oxide.

In this research, first, the Z-scan technique is used to measure the nonlinear optical properties of reduced graphene oxide (rGO) to indicate the high nonlinear coefficients. Second, a novel, to the best of our knowledge, vertically pumped, all-optical modulator is produced based on a rGO-coated multimode optical microfiber. The effect of the microfiber curvature, microfiber diameter, and substrate materials is investigated and optimized.

Functionalization of Magnetic Nanoparticles by Folate as Potential MRI Contrast Agent for Breast Cancer Diagnostics.

In recent years, the intrinsic magnetic properties of magnetic nanoparticles (MNPs) have made them one of the most promising candidates for magnetic resonance imaging (MRI). This study aims to evaluate the effect of different coating agents (with and without targeting agents) on the magnetic property of MNPs. In detail, iron oxide nanoparticles (IONPs) were prepared by the polyol method.

The Effect of Preoperative Pentoxifylline on Postoperative Pain and Development of Secondary Hyperalgesia in Patients Undergoing Laparoscopic Appendectomy: A Randomized, Double-Blind, Placebo-Controlled Trial Study.

Background: After surgery and loss of anesthetic effect, postoperative pain can annoy the patient and affect patient satisfaction with treatment. This study was aimed at evaluating the effect of preoperative pentoxifylline (PTX) on postoperative pain and development of secondary hyperalgesia in patients undergoing laparoscopic appendectomy (LA).

Methods: This randomized, double-blind, placebo-controlled clinical trial study was conducted on 91 eligible subjects with acute appendicitis referred to Shahid Beheshti hospital of Sabzevar, Iran, in 2018.

Ultrasensitive fluorescent detection of pesticides in real sample by using green carbon dots.

Pesticides, widely used in modern agriculture, could potentially cause environmental pollution and affect human lives. Hence, the development of a highly sensitive sensing element to detect pesticide residues is crucial for food safety and ecosystem protection. Optical methods based on fluorescence properties provide an ideal approach for screening and quantification of these compounds in different medias including water, plant, and nutritional products.