Influence of Silica Modulus on the Activation of Amorphous Wollastonitic Hydraulic Binders with Different Alumina Content: Study of Hydration Reaction and Paste Performance.

This study investigates how different sodium silicate SiO/NaO MS ratios (0.75, 0.9, and 1.

Contraceptive Counseling: Construction and Validation of Instrument-"5C Contraceptive Counseling".

Introduction: Contraceptive illiteracy leads to non-adherence, discontinuation, and dissatisfaction with the method. Person-centered contraceptive counseling is based on quality care on a communicative basis that promotes shared decision-making, leading to a choice adapted to the woman's needs, lifestyle, and health condition. We intend to build and validate an instrument that serves as a guide for quality contraceptive counseling, facilitating decision-making about contraceptive methods.

Development and validation of a multi-substance method for routine analysis of pesticides in post-mortem samples by Ultra-High Performance Liquid Chromatography-Tandem Mass Spectrometry.

Pesticides play an important role in forensic toxicology and are usually classified as a single class of chemicals. Despite their commonly perceived unity, pesticides encompass a spectrum of compounds, including organophosphates, carbamates, pyrethroids or organochlorines, among others, each with varying degrees of toxicity. Pesticide analysis in post-mortem samples can be difficult due to the complexity of the samples and to the high toxicity of these compounds.

The Use of Solid Sodium Silicate as Activator for an Amorphous Wollastonitic Hydraulic Binder.

To ensure the acceptable mechanical strength of amorphous wollastonitic hydraulic binders (AWHs), activation with a sodium silicate solution is necessary. However, the use of this type of activator increases the final cost and the complexity of the product's overall use. In this work, we focus on enhancing the manufacturing of the alkaline activator by producing three NaSiO powders using cost-effective raw materials.

Sensors in the Detection of Abused Substances in Forensic Contexts: A Comprehensive Review.

Forensic toxicology plays a pivotal role in elucidating the presence of drugs of abuse in both biological and solid samples, thereby aiding criminal investigations and public health initiatives. This review article explores the significance of sensor technologies in this field, focusing on diverse applications and their impact on the determination of drug abuse markers. This manuscript intends to review the transformative role of portable sensor technologies in detecting drugs of abuse in various samples.

"What Do We Know about Hope in Nursing Care?": A Synthesis of Concept Analysis Studies.

Hope is a central concept within the nursing literature, which is crucial towards the development of nursing knowledge. Nursing teams play a crucial role in exploring the meaning of hope and promoting hope among patients and their families. This study aims to synthesize concept analysis studies of hope in the context of nursing care and to propose an evidence-based update of the definition of hope in the International Classification for Nursing Practice (ICNP).

Novel Amorphous-Wollastonitic Low-Calcium Hydraulic Binders: A State-of-the-Art Review.

Because of the severe environmental impact of the CO emissions associated with the production of ordinary Portland cement (OPC) and the increasing demand for this commodity material, the development of alternative products has become a global concern. One alternative to OPC, or alitic-based clinkers, are amorphous-wollastonitic low-calcium hydraulic binders (AWLCs). This new class of hydraulic binders, described in the literature for the first time in 2015, may significantly reduce the CO emissions associated with its production, resulting from its lower calcium content, but also from the fact that its production technology can be fully electrified.

Analysis of Cannabinoids in Biological Specimens: An Update.

Cannabinoids are still the most consumed drugs of abuse worldwide. Despite being considered less harmful to human health, particularly if compared with opiates or cocaine, cannabis consumption has important medico-legal and public health consequences. For this reason, the development and optimization of sensitive analytical methods that allow the determination of these compounds in different biological specimens is important, involving relevant efforts from laboratories.

Hope Aspects of the Women's Experience after Confirmation of a High-Risk Pregnancy Condition: A Systematic Scoping Review.

Background: Pregnancy is a period of transformation, hope, expectation, and worry for women and their families. A high-risk pregnancy refers to a pregnancy in which the mother and/or fetus are at greater-than-normal risk of complications, and it evokes a range of emotional and psychological experiences that largely depend on the care and support provided by health professionals. The purpose of this review is to summarize the existing literature on the lived experience of hope in women facing a high-risk pregnancy related to their own health and/or medical conditions related to the fetus.

An Update on the Implications of New Psychoactive Substances in Public Health.

The emergence of new psychoactive substances has earned a great deal of attention, and several reports of acute poisoning and deaths have been issued involving, for instance, synthetic opiates. In recent years, there have been profound alterations in the legislation concerning consumption, marketing, and synthesis of these compounds; rapid alert systems have also been subject to changes, and new substances and new markets, mainly through the internet, have appeared. Their effects and how they originate in consumers are still mostly unknown, primarily in what concerns chronic toxicity.

Alternative Clinker Technologies for Reducing Carbon Emissions in Cement Industry: A Critical Review.

Currently, the production of one ton of ordinary Portland cement (OPC) releases considerable amounts of CO into the atmosphere. As the need and demand for this material grows exponentially, it has become a challenge to increase its production at a time when climate-related problems represent a major global concern. The two main CO contributors in this process are fossil fuel combustion to heat the rotary kiln and the chemical reaction associated with the calcination process, in the production of the clinker, the main component of OPC.

The Apparent Activation Energy of a Novel Low-Calcium Silicate Hydraulic Binder.

In this work, the apparent activation energy () of a novel low-calcium binder was, for the first time, experimentally determined, using a calorimetric approach. Additionally, a correlation between the , measured at the acceleration period with the C/S ratio of the hydration product is proposed. The of the prepared pastes was determined through isothermal calorimetry tests by calculating the specific rate of reaction at different temperatures, using two different approaches.

Recent bionalytical methods for the determination of new psychoactive substances in biological specimens.

One of the problems associated with the consumption of new psychoactive substances is that in most scenarios of acute toxicity the possibility of quick clinical action may be impaired because many screening methods are not responsive to them, and laboratories are not able to keep pace with the appearance of new substances. For these reasons, developing and validating new analytical methods is mandatory in order to efficiently face those problems, allowing laboratories to be one step ahead. The goal of this work is to perform a critical review regarding bionalytical methods that can be used for the determination of new psychoactive substances (phenylethylamines, cathinones, synthetic cannabinoids, opioids, benzodiazepines, etc), particularly concerning sample preparation techniques and associated analytical methods.

Determination of Selected Cathinones in Blood by Solid-Phase Extraction and GC-MS.

The emergence of potentially dangerous new psychoactive substances (NPS) is challenging for forensic laboratories, as well as the ability to develop and validate methods for a rapid and unambiguous monitoring of these compounds. Thereupon, the aim of this work was to establish a methodology for the identification and quantification of four synthetic cathinones already seized in Portugal [4-chloroethcathinone (4-CEC), α-pyrrolidinovalerophenone (α-PVP), 4-chloro-pyrrolidinovalerophenone (4-Cl-PVP) and methylenedioxypyrovalerone (MDPV)] in whole blood samples, using gas chromatography coupled to mass spectrometry (GC-MS). The analytes were extracted from blood by solid-phase extraction (SPE) and derivatized with N-methyl-N-(trimethylsilyl)trifluoroacetamide (MSTFA) with 5% trimethylchlorosilane (TMCS).