Composition Studies - Science topic

Here we report the structural and magnetic properties of cluster of ultrafine copper ferrite (Cu x Fe 1-x O 4) nanoparticles with different Cu:Fe composition synthesized by aqueous chemical reduction technique. The morphological, microstructural and compositional studies confirm the formation of Cu x Fe 1-x O 4 nanoparticles with varied Cu and Fe p...

Marine fuel oil stability has always been an issue for bunkering companies and ship owners all around the world and the problem has become even more apparent with the introduction of the Global Sulphur Gap by the International Maritime Organization (IMO) in 2020. In this article, the historical background and the technical reasons why marine fuel o...

The rarity of lipodystrophies implies that they are not well-known, leading to delays in diagnosis/misdiagnosis. The aim of this study was to assess the natural course and comorbidities of generalised and partial lipodystrophy in Spain to contribute to their understanding. Thus, a total of 140 patients were evaluated (77.1% with partial lipodystrop...

In the present study, lithium doped vanadium pentoxide LixV2O5 (0.2 ≤ x ≤ 0.8) specimens have been prepared by the solid-state synthesis method, which possesses an ionic and electronic conducting nature. Lithium incorporates vanadium pentoxide to increase electrical conductivity as well as to enhance energy storage capacity. The undoped V2O5 sample...

Aim . To study the intraspecific diversity of coliform bacteria represented in microbial communities in biofilms of manure effluents (ME), as well as to evaluate the effect of chemical reagents on the composition of microbial consortia and some properties of bacteria of the genus Escherichia. Material and Methods . Biofilms of ME were obtained unde...

Oligosaccharides are significant in mammalian milk, where they serve as prebiotics that promote the growth of beneficial gut bacteria in infants. Comprehensive research of milk oligosaccharides requires precise and validated analytical methods for compositional studies. To address this need, the focus of our study was to develop and validate an ana...

In this study, composites made from water hyacinth powder (WPH) and rice husk powder (RH) were created using the hot press method, and the composites were characterized to determine their suitability for biomedical applications such as tissue engineering. The mixing ratio of WPH/RH was investigated. Fourier transmission infrared spectroscopy (FTIR)...

This search consists of mixed ligands derived from naphthol both ligands coordinated with (Co and Cu)(II) , the mole ratio was (1:1:1) the suggestion geometrical structures of mixed ligands and its complexes have been studied by (FTIR, UV-Visible, Mass , elementary analysis (C.H.N) ,molar conductivity and magnetic susceptibility) , the results of a...

Background: Aloe species are among the most significant plants with several applications. Many of the species, however, are underexplored, owing to their scarcity and limited geographical distribution. A. adigratana Reynolds, which is common in Ethiopia, is one of the little-studied and endangered Aloe species. Objective: This preliminary study foc...

Solid state reaction has been used successfully to prepare the spinel ferrite Cu0.6Ni0.4Fe2O4. The cubic structure of the sample was discovered by XRD crystal structure analyses. The Rietveld Refinement was used to further refine the XRD spectra, and all of the structure-related data were acquired, confirming the cubic (Fd-3m) structure. The calcul...

A BSTRACT Background Bone and muscle mass decline after menopause. The risk of osteoarthritis (OA), sarcopenia, and osteoporosis increases in later life. Our objective aimed to assess the possible factors affecting osteoarthritis in menopausal women. Methods This is a registry study of osteoporosis, sarcopenia, and osteoarthritis. All subjects ac...

In the present work, we report the preparation and study of tin (Sn) substituted polycrystalline HfO2, which is known for its fascinating ferroelectric properties. Hf1-xSnxO2 (x=0 to 0.1) are prepared by conventional solid state reaction method and characterized by x-ray diffraction (XRD), Raman spectroscopy, 119\documentclass[12pt]{minimal} \usepa...

The structure, dynamics and function of lipid vesicles are heavily influenced by a range of physical forces, local microenvironmental effects and interactions with perturbative molecules, including detergents. Detergent-induced membrane interactions - critical for a wide range of applications including protein extraction and virus inactivation - va...

This study used the chemical reduction method to synthesize iron-nickel (FeNi)-reduced graphene oxide (rGO) nanocomposites. FeNi-rGO nanocomposites were characterized by Scanning Electron Microscope (SEM), X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Raman spectroscopy, UV-Vis spectroscopy and Energy dispersive spectrosc...

This article describes an experiment in pedagogy for general writing improvement at the university level consisting of a course of Free Voluntary Reading (FVR), which can be offered either independently of or together with standard courses on writing. Evidence so far supporting the efficacy of FVR in helping students to improve their writing skills...

Synthesis of exceed quality yoghurt soymilk with cow milk of protein, unsaturated fatty acid, increases value of sensory evaluation, low sugar level, low cholesterol yoghurt application of lactobacillus bulgaricus culture in soymilk in cow milk effect of chemical composition studied. it was found more helpful creation to health. Particular diabetes...

Composite cognitive measures in large-scale studies with biomarker data for amyloid and tau have been widely used to characterize Alzheimer's disease (AD). However, little is known about how the findings from these studies translate to memory clinic populations without biomarker data, using single measures of cognition. Additionally, most studies h...

Objectives The relationship between handgrip strength (HGS) and quality of life is inconsistent. The purpose of this study was to investigate the potential association between HGS and quality of life in the settings of ageing and Alzheimer’s disease (AD). Methods We investigated the HGS, CASP-12 (control, autonomy, self-realization, and pleasure)...

The sustainable development of waste-recycled polymer matrix composites found a wide range of applications due to their superior specific properties, reliability, and economics. The prime aim of this research is to enhance the structural stability of Kevlar fiber–reinforced polypropylene composite by the additions (0, 3, 6, 9, and 12wt%) of cotton...

Waste segregation is an essential function in improving waste management. Waste segregation not only facilitates recycling and reduces waste going to landfills, rather it can benefit our environment and human in various ways. A pick analysis of waste composition is used to characterize the household waste stream and thus can analyze the segregation...

This paper reports a method for the fabrication of mineral-like SrMoO4 ceramics with a powellite structure, which is promising for the immobilization of the high-energy 90Sr radioisotope. The reported method is based on the solid-phase “in situ” interaction between SrO and MoO3 oxides initiated under spark plasma sintering (SPS) conditions. Dilatom...

Background: Aloe species are among the most significant plants with several applications. Many of the species, however, are underexplored, owing to their scarcity and limited geographical distribution. A. adigratana Reynolds, which is common in Ethiopia, is one of the little-studied and endangered Aloe species. Objective: This preliminary study...

Striking examples of calcretes have been formed in alluvial and aeolian sediments of the Qazvin Plain in Iran. In the present research, eight profiles were studied, varying from recent proximal alluvial fans to adjacent alluvial plains and sand dunes. Macroscopic, microscopic, isotopic, and elemental composition studies show that both pedogenic and...

Together, the Camper's and Scarpa's fasciae form the superficial fat layer of the abdominal wall. Though they have clinical and surgical relevance, little is known about their role in body composition across diverse patient populations. This study aimed to determine the relationship between patient characteristics, including sex and body mass index...

Dentre as ferramentas moleculares que utilizadas em estudos de composição gênica e estruturas de diversidade genética de populações, destaca-se o marcador ISSR (Inter Simple Sequence Repeats). Esta técnica é baseada em reações de PCR (Polimerase Chain Reaction) de iniciador único que amplifica fragmentos localizados entre as repetições de sequência...

Objectives Pilot studies have demonstrated the preliminary effectiveness and acceptability of mindfulness-based interventions (MBIs) with Black Americans. However, qualitative evidence suggests that some participants perceive discordance between mindfulness and religion/spirituality. This presents a potentially significant barrier to MBI engagement...

The natural healing process of bone is impaired in the presence of tumors, trauma, or inflammation, necessitating external assistance for bone regeneration. The limitations of autologous/allogeneic bone grafting are still being discovered as research progresses. Bone tissue engineering (BTE) is now a crucial component of treating bone injuries and...

We report the formation of Mo1-xWxO3-CdS (0≤x≤1) nanophotocatalysts by a combination of solid-state and solution impregnation processes. The formation of 2D+1D heterostructured composite was revealed by electron microscopy and the structure of ternary cocatalyst and photocatalysts were confirmed by spectroscopic analyses. The H2 evolution activity...

Cocos nucifera L. is one of the most cultivated palm trees in the world since it is used to obtain both raw materials and food. From a human point of view, the coconut fruit is a very valuable product, producing an aromatic and tasty liquid endosperm (coconut water) containing high levels of sugars, amino acids and other molecules of nutritional an...

Background: In Colombia, most traditional cocoa crops are developed under agroforestry systems (SAF), associating shrubs and trees that provide shade for cocoa. They generate additional economic income and various ecosystem services. Objective: To characterize agroforestry systems with cocoa in three municipalities in eastern Boyacá (Miraflores, Be...

In 2013, Joerg Arndt recorded that the Fibonacci numbers count integer compositions where the first part is greater than the second, the third part is greater than the fourth, etc. We provide a new combinatorial proof that verifies his observation using compositions with only odd parts as studied by De Morgan. We generalize the descent condition to...

The metallic artefacts collected in the walled chalcolithic settlement of Outeiro Redondo. Compositional studies using the X-ray fluorescence spectrometry method. This study is based on the analysis of copper metal alloys from 109 artifacts collected in the excavations carried out in the walled Chalcolithic settlement of Outeiro Redondo (Sesimbra)...

404 Páginas. ÍNDICE GERAL / CONTENTS: ISALTINO MORAIS - Apresentação / Presentation ; JOÃO LUÍS CARDOSO, FILIPE MARTINS & VASCO LEITÃO - A Encosta de Sant’ana no quadro da economia alimentar do Neolítico Antigo da Península de Lisboa / The Encosta de Sant’ana in the framework of the Early Neolithic food economy of the Lisbon Peninsula; JOÃO LUÍS C...

The paper presents an original approach to the synthesis of polycalciumorganyl silsesquioxanes through the reaction of polyorganyl silsesquioxanes [RSiO1.5]n (where R is an ethyl and phenyl radical) with sea urchin skeleton under the conditions of mechanochemical activation. The novelty and practical significance of the present study lies in the us...

Targeted fracture prevention strategies among late‐life adults should balance fracture risk versus competing mortality risk. Models have previously been constructed using Fine‐Gray subdistribution methods. We used a machine learning method adapted for competing risk survival time to evaluate candidate risk factors and create models for hip fracture...

Among classical nanoporous oxide membranes, anodic aluminum oxide (AAO) membranes, made of non-connected, parallel and ordered nanochannels, are very interesting nanoporous model systems widely used for multiple applications. Since most of these applications involve local phenomena at the nanochannel surface, the fine description of the electrical...

Porphyry Cu (Mo-Au) deposit is one of the most important types of copper deposit and usually formed under magmatic arc-related settings, whilst the Mujicun porphyry Cu-Mo deposit in North China Craton uncommonly generated within intra-continental settings. Although previous studies have focused on the age, origin and ore genesis of the Mujicun depo...

In two composition ranges of nanocomposites, anomalous enhancement of the dielectric property of polyetherimide (PEI, dielectric constant ~ 3.2) by adding Al2O3 nanoparticles (dielectric constant ~ 9–10), which have dielectric properties comparable to PEI, was found. At a low filling ratio (< 0.8 vol%), the dielectric constant of the nanocomposites...

Background. The purpose of the study is to analyze the content of free fatty acids (FFA) in the blood serum of overweight and underweight patients with gastrointestinal diseases. Mate­rials and methods. Thirty-one patients with gastrointestinal diseases were examined, 19 (61.3 %) men and 12 (38.7 %) women with a median age of 39 (27; 48) years. Dep...

In this study, a conductive composite material, based on graphene oxide (GO), nanocellulose (CNF), and tannins (TA) from pine bark, reduced using polydopamine (PDA), was developed for wound dressing. The amount of CNF and TA was varied in the composite material, and a complete characterization including SEM, FTIR, XRD, XPS, and TGA was performed. A...

Vitamin D deficiency is prevalent in 25% of Americans. However, 25(OH)D may not be an accurate measure of vitamin D because the majority (85%–90%) of 25(OH)D is bound to vitamin D binding protein (VDBP), which varies by over 30% across individuals. Free 25(OH)D may be a better measure, but it is difficult to measure accurately and precisely. The ex...

Convectively coupled Kelvin waves (CCKWs) are tropical weather systems that travel eastward along the equatorial waveguide and have previously been linked to 90% of flooding events in Sumatra, Indonesia. Here, the processes through which CCKWs influence convection to produce extreme precipitation are investigated, with a focus on Padang, a city on...

Removal of alizarin red S (ARS) and Indigo dye from aqueous media and reduction of nitro aromatic compounds are successfully done under mild condition by using reduced Graphene Oxide-Nickel Oxide (rGO-NiO) nanocomposite as catalyst. RGO-NiO is well characterized by different analytical techniques. Morphology, structural, and composition studies don...

The effect of by-products of chicken slaughter (chicken feet and heads) on the physical and chemical properties of forcemeat formulations was investigated. The chicken feet and heads were prepared in the form of ground mass and in the form of dry powder. Six types of samples were made with the addition of ground mass and powder of the chicken feet...

Aquatic macrophytes play a significant role in maintaining the aquatic ecosystem by providing shelter for aquatic organisms and lives of rural communities. But unfortunately very negligible effort is put forwarded for the conservation of these great resources. It may create major problem in new future. So the aim of the present investigation is the...

With the continuous utilization of green energy resource, energy storage devices are becoming one of the main issues in the field of energy. Supercapacitors have achieved great popularity owing to their several advantages in energy storage. For determining the efficiency of the supercapacitor, the electrode material is considered as the core elemen...

Background: This study aimed to determine if greater variability in body mass index (BMI) is associated with declines in physical functioning and incident disability in older adults. Methods: Included were participants from the Health, Aging and Body Composition Study who had semi-annual BMI data during the first 3 years of follow-up. Participan...

In the present work, the effectiveness of four non-halogenated flame retardants (FR) (aluminium trihydroxide (ATH), magnesium hydroxide (MDH), Sepiolite (SEP) and a mix of metallic oxides and hydroxides (PAVAL)) in blends with recycled acrylonitrile-butadiene-styrene (rABS) was studied in order to develop a more environmentally friendly flame-retar...

Cassiterite mineralization occurs in both the rock and the alluvial sediments in the Mayo-Darlé massif of northern Cameroon. Active alluvial mining by artisans constitutes the most important rural economic activity. This study focuses on the morphology, mineral inclusions, and composition of alluvial cassiterite derived from Bambol and Mayo Seni lo...

The new mineral hasanovite KNa(MoO2)(SO4)2 was discovered in sublimates of a natural underground coal fire at the Fan-Yagnob coal deposit in the upper reaches of the Kuhi-Malik ravine in the Aini district, Central Tajikistan. The mineral is named in honor of the petrographer Abdurahim Hasanovich Hasanov (born 1933). Hasanovite occurs as small (50-2...

Bacterial spot of tomato is a major constraint to tomato production in tropical, subtropical, and temperate climates, leading to significant crop losses. The current study aimed to manage the highly devastating disease bacterial spot of tomato, caused by Xanthomonas perforans, using green silver nanoparticles based on Berberis vulgaris plant extrac...

Sub-Saharan Africa (SSA) is one of the regions most affected by climate change and health problems caused by atmospheric pollution are becoming increasingly serious. Based on the daily data of OMI/AURA UVAI from 2010 to 2021, this study derived the spatial and temporal distribution patterns of UVAI levels in SSA over a long time series. By using bi...

Unlabelled: Piper chaba, a traditional South-east Asian medicinal herb and well-known curry spice, was studied to evaluate its suitability as a source of natural preservatives for beef products. Plant extracts that are high in phenolics and have high antimicrobial and antioxidant activities are likely to be useful as a natural preservative. Theref...

In this work, composite fluoropolymer-containing coatings were obtained on samples of AMg3 aluminium alloy, MA8 magnesium alloy, and VT1-0 commercially pure titanium treated by plasma electrolytic oxidation (PEO). Superdispersed polytetrafluoroethylene (SPTFE) and a solution of tetrafluoroethylene (TFE) telomers in acetone were applied onto prelimi...

Plant extracts have been evaluated to determine their bioactivities and their potential use in wound healing. In this study, a conductive composite material, based on graphene oxide (GO), nanocellulose (CNF) and tannins (TA) from pine bark, reduced using polydopamine (PDA), was developed for wound dressing. The amount of CNF and TA was varied in th...

The ferritic-martensitic 9Cr-1Mo steel was coated with a sol-gel ZrO2-3%molY2O3 solution by dip-coating. The protective properties of the coating were evaluated in contact with Solar Salt for CSP applications. The coated and uncoated steels were tested at 500 °C in contact with the Solar Salt for 2000 h. Gravimetric, microstructural and composition...

Indium-doped CdSe has shown great potential as an active absorber and a window material in optoelectronic devices. In this communication, surface engineering of CdSe thin films was achieved by indium doping using an indigenously developed chemical growth technique. The substantial replacement of Cd²⁺ by In³⁺ was observed through the compositional s...

Nowadays, Y-shaped non-fullerene acceptors become increasingly important in organic photovoltaics (OPV). Their use in binary and ternary bulk heterojunction composites continuously pushes up the efficiency of OPV devices. However, the mechanism of OPV performance enhancement by the third component of a ternary composite is rarely understood. In the...

The present study evaluated the effect of extraction equipment and technique on the yield, content of main compounds and antibacterial activity of the essential oil of Lavandula dentata (EO) collected in the region of Sefrou, Morocco. The chemical composition study was performed using GC-MS methods for various essential oils extracted by Clevenger...

Light-induced effects on the autonomic nervous system (ANS) are assumed to be mediated by retinal projections to the hypothalamic suprachiasmatic nucleus (SCN) via different routes. Light information for the circadian system is detected by a subset of intrinsically photosensitive retinal ganglion cells (ipRGCs), however, inconsistency exists in res...

Unlike the wide-ranging habitat generalists that move seasonally across heterogenous habitats to optimize the energy intake, short-ranging habitat specialists fulfil the same by restricting to single habitat. Understanding how habitat-specialists do this is an interesting question and essential for their conservation. We studied the diet compositio...