Comparison of Raman and attenuated total reflectance (ATR) infrared spectroscopy for water quantification in natural deep eutectic solvent.

Natural deep eutectic solvents (NADES) are ionic solutions, of great interest for extraction from biomass, biocatalysis, and nanoparticle synthesis. They are easily synthesised and eco-friendly, have low volatility and high dissolution power, and are biodegradable. However, water content in NADES is a critical parameter, affecting their optimal use and extraction efficiency. Vibrational spectroscopic techniques are rapid, label-free, non-destructive, non-invasive, and cost-effective analytical tools that can probe the molecular composition of samples. A direct comparison between a previous study using attenuated total reflectance infrared (ATR-IR) spectroscopy for water quantification in NADES and the same investigation performed with Raman spectroscopy is presently reported. Three NADES systems, namely betaine-glycerol (BG), choline chloride-glycerol (CCG), and glucose-glycerol (GG), containing a range of water concentrations between 0% (w/w) and 40% (w/w), have been analysed with Raman spectroscopy coupled to partial least squares regression multivariate analysis. The values of root mean square error of cross-validation (RMSECV) obtained from analysis performed on the pre-processed spectra over the full spectral range (150-3750 cm-1) are respectively 0.2966% (w/w), 0.4703% (w/w), and 0.2351% (w/w) for BG, GG, and CCG. While the direct comparison to previous ATR-IR results shows essentially similar outcomes for BG, the RMSECV is 33.14% lower and 65.84% lower for CG and CCG. Furthermore, mean relative errors obtained with Raman spectroscopy, and calculated from a set of samples used as independent samples, were 1.452% (w/w), 1.175% (w/w), and 1.188% (w/w). Ultimately, Raman spectroscopy delivered performances for quantification of water in NADES with similar accuracy to ATR-IR. The present demonstration clearly highlights the potential of Raman spectroscopy to support the development of new analytical protocols in the field of green chemistry.

Quantification of low-content encapsulated active cosmetic ingredients in complex semi-solid formulations by means of attenuated total reflectance-infrared spectroscopy.

Attenuated total reflectance-infrared (ATR-IR) spectroscopy is a robust tool for molecular characterisation of matter. Applied to semi-solid formulations, it enables rapid and reliable data collection without pre-analytical requirements. Based on nano-encapsulated Omegalight®, a skin-lightening active cosmetic ingredient (ACI), incorporated in a hydrogel, it is first demonstrated that, despite the high water content and the chemical complexity of the samples (i.e. number of ingredients), the spectral features of the ACI can be detected and monitored. Secondly, with a total of 105 samples divided into a training set (n = 60) and an unknown set (n = 45) covering a 0.5% w/w-5% w/w concentration range, the study further investigates the quantitative performance of ATR-IR coupled with partial least squares regression (PLSR). Through a step-by-step approach in testing different cross-validation protocols, accuracy (root mean square error of cross-validation (RMSECV)) and linearity between the experimental and predicted concentrations (R2) of ATR-IR are consistently evaluated to be respectively 0.097% (w/w) and 0.995 with a lower LOD = 0.067% (w/w). Subsequently, further evaluation of the accuracy (relative error of the predicted concentration compared with the true value, expressed as %) of the analysis was undertaken with the 45 unknown samples that were defined as unknown and analysed by PLSR. The outcome of the analysis demonstrates the ruggedness and the consistency of the determination performed using the ATR-IR data. With an average relative error of 2.5% w/w and only 5 samples out of 45 blind samples exhibiting a relative error above the 5% threshold, high accuracy quantification of the nano-encapsulated ACI can be unambiguously achieved by means of the label-free and non-destructive technique of ATR-IR spectroscopy. Ultimately, the study demonstrates that the analytical capabilities of ATR-IR hold significant potential for applications in the cosmetics industry, and although the path remains long, the present study is one step further to support validation of the technique, albeit for the specific case of Omegalight®.

The Wahine Heart Wellness Program: A Community Approach to Reducing Women's Cardiovascular Disease Risk.

Cardiovascular disease remains the leading cause of death for women in the United States. Although Hawai'i has relatively low rates of death from heart disease and stroke, Native Hawaiians and Other Pacific Islanders (NHOPI) are plagued with disproportionately higher rates of the chronic diseases that contribute to these deaths. This study follows a Practice Inquiry Project framework and aims to improve identification of cardiovascular disease (CVD) risk and promote health literacy of the disease in Asian, Native Hawaiians and Other Pacific Islander women on O'ahu. The study addresses: (a) assessment of current level of awareness of CVD as the leading cause of death for this population; (b) implementation of a CVD risk reduction program; and (c) an evaluation of that program's effectiveness in decreasing CVD risk. The study design used a mixed methods approach. The methods included a cardiovascular awareness questionnaire (pre-test and post-test), a screening process using the American Heart Association's Life's Simple 7 matrix, and 6 educational sessions. With these research methods, the participants' knowledge levels, health perceptions, and behaviors were evaluated. A convenience sample of 20 predominantly Asian, Native Hawaiian, and Pacific Islander women were recruited. At the conclusion of the project, participants showed increased awareness of CVD and improved behaviors to reduce the risk of CVD. The project also demonstrated that collaboration and partnerships between local schools of nursing and community organizations, community-based integrated approaches, incorporating health literacy, and infusing cultural knowledge into practice are important in creating successful and innovative solutions when working with Asian, Native Hawaiian, and Other Pacific Islander women.

Diagnóstico molecular de factores protrombóticos: primeros casos de factor V Leiden y protrombina 2021OA en Uruguay / Molecular diagnosis of prothrombosis factors: first cases of factor V Leiden and prothrombin 20210A en Uruguay

La enfermedad tromboembolítica constituye un gran problema clínico debido a su alta incidencia y a su importante morbilidad. Desde el punto de vista patogénico, esta es una enfermedad multifactorial que resulta de la interrelación entre factores ambientales y genéticos. Durante los últimos años se han identificado varios factores genéticos que predisponen a la trombosis, sin embargo hasta el momento sólo dos de ellos tienen una alta prevalencia: el factor V Leiden y la protrombina 20210A. El FV Leiden es el factor de riesgo genético más frecuentemente encontrado en las trombosis venosas. Corresponde a una mutación en el gen del factor V, que determina una resistencia a la inactivación del factor V activado por la proteína C activada. La incidencia encontrada en pacientes con trombosis venosa es de 20 por ciento, determinando para aquellos portadores heterozigotos un aumento de siete veces en el riesgo de trombosis. La variante alélica protrombina 20210A es una mutación en el gen de la protrombina asociada a un aumento de la concentración plasmática de protrombina y que confiere un mayor riesgo de trombosis venosa a los individuos portadores de esta mutación. Se ha observado una incidencia de 18 por ciento en pacientes con historia familiar de trombosis, mientras que en sujetos sanos es de aproximadamente 2 por ciento. Debido a que ambos defectos son causados por una mutación puntual, el análisis molecular es considerado un pilar diagnóstico. La alta prevalencia de estas alteraciones genéticas encontrada a nivel mundial, conjuntamente con el riesgo trombótico que conllevan, pone de manifiesto la importancia de este estudio en nuestro país. En este trabajo se discuten los primeros casos diagnosticados como portadores de estas mutaciones en Uruguay