Solid state differentiation of plasma thiols using a centrifugally activated mercaptobenzothiazole disulfide exchange indicator

The solid state interaction of mono and macromolecular thiols at a disulphide heterocycle is shown to provide a versatile pathway for their speciation

Global burden of 288 causes of death and life expectancy decomposition in 204 countries and territories and 811 subnational locations, 1990–2021: a systematic analysis for the Global Burden of Disease Study 2021

BACKGROUND Regular, detailed reporting on population health by underlying cause of death is fundamental for public health decision making. Cause-specific estimates of mortality and the subsequent effects on life expectancy worldwide are valuable metrics to gauge progress in reducing mortality rates. These estimates are particularly important following large-scale mortality spikes, such as the COVID-19 pandemic. When systematically analysed, mortality rates and life expectancy allow comparisons of the consequences of causes of death globally and over time, providing a nuanced understanding of the effect of these causes on global populations. METHODS The Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2021 cause-of-death analysis estimated mortality and years of life lost (YLLs) from 288 causes of death by age-sex-location-year in 204 countries and territories and 811 subnational locations for each year from 1990 until 2021. The analysis used 56 604 data sources, including data from vital registration and verbal autopsy as well as surveys, censuses, surveillance systems, and cancer registries, among others. As with previous GBD rounds, cause-specific death rates for most causes were estimated using the Cause of Death Ensemble model-a modelling tool developed for GBD to assess the out-of-sample predictive validity of different statistical models and covariate permutations and combine those results to produce cause-specific mortality estimates-with alternative strategies adapted to model causes with insufficient data, substantial changes in reporting over the study period, or unusual epidemiology. YLLs were computed as the product of the number of deaths for each cause-age-sex-location-year and the standard life expectancy at each age. As part of the modelling process, uncertainty intervals (UIs) were generated using the 2·5th and 97·5th percentiles from a 1000-draw distribution for each metric. We decomposed life expectancy by cause of death, location, and year to show cause-specific effects on life expectancy from 1990 to 2021. We also used the coefficient of variation and the fraction of population affected by 90% of deaths to highlight concentrations of mortality. Findings are reported in counts and age-standardised rates. Methodological improvements for cause-of-death estimates in GBD 2021 include the expansion of under-5-years age group to include four new age groups, enhanced methods to account for stochastic variation of sparse data, and the inclusion of COVID-19 and other pandemic-related mortality-which includes excess mortality associated with the pandemic, excluding COVID-19, lower respiratory infections, measles, malaria, and pertussis. For this analysis, 199 new country-years of vital registration cause-of-death data, 5 country-years of surveillance data, 21 country-years of verbal autopsy data, and 94 country-years of other data types were added to those used in previous GBD rounds. FINDINGS The leading causes of age-standardised deaths globally were the same in 2019 as they were in 1990; in descending order, these were, ischaemic heart disease, stroke, chronic obstructive pulmonary disease, and lower respiratory infections. In 2021, however, COVID-19 replaced stroke as the second-leading age-standardised cause of death, with 94·0 deaths (95% UI 89·2-100·0) per 100 000 population. The COVID-19 pandemic shifted the rankings of the leading five causes, lowering stroke to the third-leading and chronic obstructive pulmonary disease to the fourth-leading position. In 2021, the highest age-standardised death rates from COVID-19 occurred in sub-Saharan Africa (271·0 deaths [250·1-290·7] per 100 000 population) and Latin America and the Caribbean (195·4 deaths [182·1-211·4] per 100 000 population). The lowest age-standardised death rates from COVID-19 were in the high-income super-region (48·1 deaths [47·4-48·8] per 100 000 population) and southeast Asia, east Asia, and Oceania (23·2 deaths [16·3-37·2] per 100 000 population). Globally, life expectancy steadily improved between 1990 and 2019 for 18 of the 22 investigated causes. Decomposition of global and regional life expectancy showed the positive effect that reductions in deaths from enteric infections, lower respiratory infections, stroke, and neonatal deaths, among others have contributed to improved survival over the study period. However, a net reduction of 1·6 years occurred in global life expectancy between 2019 and 2021, primarily due to increased death rates from COVID-19 and other pandemic-related mortality. Life expectancy was highly variable between super-regions over the study period, with southeast Asia, east Asia, and Oceania gaining 8·3 years (6·7-9·9) overall, while having the smallest reduction in life expectancy due to COVID-19 (0·4 years). The largest reduction in life expectancy due to COVID-19 occurred in Latin America and the Caribbean (3·6 years). Additionally, 53 of the 288 causes of death were highly concentrated in locations with less than 50% of the global population as of 2021, and these causes of death became progressively more concentrated since 1990, when only 44 causes showed this pattern. The concentration phenomenon is discussed heuristically with respect to enteric and lower respiratory infections, malaria, HIV/AIDS, neonatal disorders, tuberculosis, and measles. INTERPRETATION Long-standing gains in life expectancy and reductions in many of the leading causes of death have been disrupted by the COVID-19 pandemic, the adverse effects of which were spread unevenly among populations. Despite the pandemic, there has been continued progress in combatting several notable causes of death, leading to improved global life expectancy over the study period. Each of the seven GBD super-regions showed an overall improvement from 1990 and 2021, obscuring the negative effect in the years of the pandemic. Additionally, our findings regarding regional variation in causes of death driving increases in life expectancy hold clear policy utility. Analyses of shifting mortality trends reveal that several causes, once widespread globally, are now increasingly concentrated geographically. These changes in mortality concentration, alongside further investigation of changing risks, interventions, and relevant policy, present an important opportunity to deepen our understanding of mortality-reduction strategies. Examining patterns in mortality concentration might reveal areas where successful public health interventions have been implemented. Translating these successes to locations where certain causes of death remain entrenched can inform policies that work to improve life expectancy for people everywhere. FUNDING Bill & Melinda Gates Foundation

Factors enhancing the interactions of lower rim calix[4]arene derivatives towards toxic metal cations in solution : versatile behaviour in the solid state

EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Factors enhancing the interactions of lower rim calix[4]arene derivatives towards toxic metal cations in solution. versatile behaviour in the solid state.

The synthesis of calix[4]arene derivatives, 5,11,17,23-tetra-tert-butyl[25,27-bis(hydroxy)-26,28-bis(ethylthioethoxy)]-calix[4]arene, L3, and 5,11,17,23-tetra-tert-butyl[25,27-bis(ethylethanoate)oxy-26,28-bis(ethylthioethoxy)]-calix[4]arene, L4, are reported. These ligands are structurally (1H, 13C NMR and X-ray crystallography) and thermodynamically (solubility, calorimetry) characterised. In addition to L3 and L4, 5,11,17,23-tetra-tert-butyl[25,26,27,28-tetrakis(ethylethanoate)- calix[4]arene, L1 and 5,11,17,23-tetra-tert-butyl[25,26,27,28-tetrakis(methylketonemethoxy)-calix[4]arene, L2, are included in this study. Therefore, ligands L1, L2, L3 and L4 were investigated by 1H NMR technique to obtain information regarding their conformation in solution and the active sites of interaction with metal cations in different deuterated solvents at 298 K. Conductance measurements were performed to establish the composition of the metal-ion complexes with L1, L3 and L4 in acetonitrile, methanol, N,N-dimethylformamide and propylene carbonate at 298.15 K. Weak or non-existing interaction was observed in the latter solvent. However, complexes of 1:1 stoichiometry are formed in all cases. Potentiometric and calorimetric measurements were carried out to establish the thermodynamic parameters of complexation of these ligands in acetonitrile, methanol, and N,N-dimethylformamide at 298.15 K. L1 and L2 behaved in a parallel fashion in acetonitrile, with a peak selectivity for Ca2+ relative to other bivalent metal cations investigated. Complexation was absent in other media. On the other hand, L4 showed higher discrimination ability towards metal cations relative to L1 in acetonitrile, methanol and N,N-dunethylformamide. In moving to L3, the selectivity of the ligand was improved with respect to L1 and L4 to recognize only Ag+ and Hg2+. The ligand and the medium effects on the complexation process are quantitatively assessed. Solution and transfer thermodynamic parameters for the reactants and the product involved in the complexation of Ag+, Hg2+ with L3 and L4 in acetonitrile (as a reference solvent), methanol and N,N-dimethylformamide (as receiving solvents) are discussed. The complexation and solution data for the reactants and the product were used to calculate the standard enthalpies of coordination as a means of checking the reliability of the data. Extraction affinity of L3 for Ag+ was investigated in the water-dichloromethane saturated system. Crystals of several ligands and their metal-ion complexes were isolated and characterized by X-ray diffraction studies. Conclusions and suggestions for further work in this area are given

How would Augmented Reality (AR) make workplaces in the construction industry more efficient

The construction industry possesses immense potential for effective digitization. Despite being one of the oldest industries on our planet, it faces challenges in keeping up with the usage of technology. This report aims to highlight the potential of technology and provide a comprehensive overview of its current utilization in the industry.The report employs three methods. Firstly, a literature study is conducted to gain insights into the current state of the construction industry and identify the areas where technology can be applied. Secondly, interviews are conducted to present a perspective on how Augmented Reality (AR) is currently being used and the challenges faced by companies in its implementation. Lastly, a survey is conducted to collect statistical data and make a value proposition, determining the user value of technology in the industry.Augmented Reality offers several features that simplify everyday tasks in the construction industry. By overlaying virtual information onto reality, AR can enhance the way construction staff interact with their environment. However, despite its benefits, Augmented Reality is still a relatively new technology and is undergoing continuous development.Through these three distinct methods, valuable insights into the integration of technology are provided, paving the way for successful digital transformation in the construction industry.

How would Augmented Reality (AR) make workplaces in the construction industry more efficient

The construction industry possesses immense potential for effective digitization. Despite being one of the oldest industries on our planet, it faces challenges in keeping up with the usage of technology. This report aims to highlight the potential of technology and provide a comprehensive overview of its current utilization in the industry.The report employs three methods. Firstly, a literature study is conducted to gain insights into the current state of the construction industry and identify the areas where technology can be applied. Secondly, interviews are conducted to present a perspective on how Augmented Reality (AR) is currently being used and the challenges faced by companies in its implementation. Lastly, a survey is conducted to collect statistical data and make a value proposition, determining the user value of technology in the industry.Augmented Reality offers several features that simplify everyday tasks in the construction industry. By overlaying virtual information onto reality, AR can enhance the way construction staff interact with their environment. However, despite its benefits, Augmented Reality is still a relatively new technology and is undergoing continuous development.Through these three distinct methods, valuable insights into the integration of technology are provided, paving the way for successful digital transformation in the construction industry.

Self-Assembly of Calcium Carbonate Nanoparticles in Water and Hydrophobic Solvents

The self-assembly of Ca²⁺ and CO₃^2– ions into nanoparticles in water and hydrophobic solvents is investigated using molecular dynamics (MD) computer simulation. A new three-stage particle assembly procedure is used which relaxes the structure of the nanoparticle toward a lower energy state. In hydrophobic solvent the bare particle is essentially spherical whereas in water it is ellipsoidally shaped. With surfactant stabilizer the nanoparticles typically exhibit nonspherical cores in model hydrophobic solvents. Binary surfactant systems exhibit synergistic effects where for example a salicylate-sulfonate combination forms a cage which promotes a compact core. Synergistic effects on the shape of the particle were also observed in a hydrophobic solvent for surfactant-stabilized systems with trace water as a third component. The simulations show that rather than being a rigid structure the carbonate core shape and stabilizing shell coverage are sensitive to solvent, surfactant, and small polar molecules which act as cosurfactants