Ex Situ Raman Mapping of LiMnO Electrodes Cycled in Lithium-Ion Batteries.

In this study, we focus on the large-scale ex situ Raman mapping of LiMnO (LMO) electrodes maintained at varying states of charge. A comprehensive statistical analysis has been conducted at an area of ca. 3660 μm on more than 3100 collected spectra for each LMO electrode sample.

Comparative study of photocatalysis with bulk and nanosheet graphitic carbon nitrides enhanced with silver.

The main goal of this research is to investigate the effectiveness of graphitic carbon nitride (g-CN, g-CN) in both bulk and nanosheet forms, which have been surface-modified with silver nanoparticles (Ag NPs), as photocatalysts for the degradation of acid orange 7 (AO7), a model dye. The photodegradation of AO7 dye molecules in water was used to test the potential photocatalytic properties of these powder materials under two different lamps with wavelengths of 368 nm (UV light) and 420 nm (VIS light). To produce Ag NPs (Ag content 0.

Utilization of compressible hydrogels as electrolyte materials for supercapacitor applications.

Utilization of CoO@CoO--Ag ( denotes 1, 3, and 5 wt% of Ag) nanocomposites as supercapacitor electrodes is the main aim of this study. A new low-temperature wet chemical approach is proposed to modify the commercial cobalt oxide material with silver nanoparticle (NP) balls of size 1-5 nm. The structure and morphology of the as-prepared nanocomposites were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and N adsorption-desorption measurements.

Structural studies and selected physical investigations of LiCoO obtained by combustion synthesis.

Nanocrystalline powders of LiCoO were synthesized using a modified solution combustion method, and the effects of the annealing temperature (450-900 °C) on structure and composition were investigated using various methods, including XRD, SEM, EPR, and electrical studies. It was found that, as the process temperature increases, the value of the specific surface area decreases, and, hence, the size of the crystallites increases. XRD analysis showed that phase-pure LiCoO material was maintained without additional phases.

Vanadium oxide nanorods as an electrode material for solid state supercapacitor.

The electrochemical properties of metal oxides are very attractive and fascinating in general, making them a potential candidate for supercapacitor application. Vanadium oxide is of particular interest because it possesses a variety of valence states and is also cost effective with low toxicity and a wide voltage window. In the present study, vanadium oxide nanorods were synthesized using a modified sol-gel technique at low temperature.

Macroporous perovskite nanocrystal composites for ultrasensitive copper ion detection.

Accumulation of heavy metal ions, including copper ions (Cu), presents a serious threat to human health and to the environment. A substantial amount of research has focused on detecting such species in aqueous solutions. However, progress towards ultrasensitive and easy-to-use sensors for non-aqueous solutions is still limited.

Surface Modification of Nanocrystalline LiMnO Using Graphene Oxide Flakes.

In this work, a facile, wet chemical synthesis was utilized to achieve a series of lithium manganese oxide (LiMnO, (LMO) with 1-5%wt. graphene oxide (GO) composites. The average crystallite sizes estimated by the Rietveld method of LMO/GO nanocomposites were in the range of 18-27 nm.

Corrigendum to "Spectroscopic and structural properties of CeO2 nanocrystals doped with La3+, Nd3+ and modified on their surface with Ag nanoparticles" [Heliyon 7 (5) (May 2021) e06958].

[This corrects the article DOI: 10.1016/j.heliyon.

Solution combustion synthesis of a nanometer-scale CoO anode material for Li-ion batteries.

A novel solution combustion synthesis of nanoscale spinel-structured CoO powder was proposed in this work. The obtained material was composed of loosely arranged nanoparticles whose average diameter was about 36 nm. The as-prepared cobalt oxide powder was also tested as the anode material for Li-ion batteries and revealed specific capacities of 1060 and 533 mAh·g after 100 cycles at charge-discharge current densities of 100 and 500 mA·g, respectively.

Spectroscopic and structural properties of CeO nanocrystals doped with La, Nd and modified on their surface with Ag nanoparticles.

The purpose of this work is to present our efforts focused on applications of chemical synthesis of nanocrystalline cerium dioxide (CeO) powders doped with La ions and CeO:Nd modified, on their surface, with Ag nanoparticles (NPs). The synthesized powders were examined by X-ray powder diffraction (XRD), absorption, emission spectroscopy, scanning electron (SEM) and atomic force microscopy (AFM). The relations between crystallographic properties and stability of CeO compounds doped by La ions and surface-modified by Ag were studied.

Selective attentional bias to food-related stimuli in healthy individuals with characteristics towards orthorexia nervosa.

Purpose: It has been argued that orthorexia nervosa (ON) is a unique type of disordered eating of food considered by the individual to be healthy. Given that in other eating disorder populations attentional preference for food-related cues influences eating behaviours, is it also likely that these biases may be a characteristic of ON tendency.

Methods: Eighty healthy individuals completed the ORTO-15 questionnaire (ON tendency), a modified Stroop task containing words related to healthy and unhealthy foods and perceived hunger levels pre- and post-testing.

Understanding drinking among midlife men in the United Kingdom: A systematic review of qualitative studies.

Objectives: This study reviews qualitative research into the sociocultural meanings and subjective experiences that midlife men in the United Kingdom (UK) associate with their drinking. In the UK, average weekly alcohol consumption is highest among midlife men, and they are disproportionately affected by alcohol harm. There is increasing recognition that public health messages to support behaviour change must be based on an in-depth understanding of drinking motivations and experiences.

A focus on homocysteine in autism.

Homocysteine is an amino acid, which plays several important roles in human physiology. A wide range of disorders, including neuropsychiatric disorders and autism, are associated with increased homocysteine levels in biological fluids. Various B vitamins: B6 (pyridoxine), B12 (cobalamin), and B9 (folic acid) are required as co-factors by the enzymes involved in homocysteine metabolism.

Vitamin supplementation reduces the level of homocysteine in the urine of autistic children.

Significant differences in homocysteine levels in the urine of autistic children are observed. We hypothesized that vitamin supplementation might reduce the level of urinary homocysteine. To rationalize such a hypothesis, analyses were performed using the gas chromatography/mass spectrometry method.

Homocysteine level in urine of autistic and healthy children.

Homocysteine is an amino acid which plays several important roles in human physiology and is an important biomarker for possible deficiencies of various vitamins (vitamin B₆ and B₁₂, folic acid). In this work GC-MS method was used to determine the levels of homocysteine in the urine of autistic and healthy children. The levels of homocysteine in urine samples from 34 autistic and 21 healthy children were 2.

Determination of tryptophan in urine of autistic and healthy children by gas chromatography/mass spectrometry.

Background: Tryptophan is an amino acid, which is responsible for the production of serotonin in the body. Lower levels of tryptophan may play a role in pediatric disorders. In this work the urinary level of tryptophan in autistic and healthy children was compared.

[The role of the pineal gland and melatonin in the regulation of adenohypophysial hormone synthesis and secretion].

This paper reviews findings accumulated on the role of the pineal gland and its hormone,melatonin, in the regulation of hypothalamo-adenohypophysial system activity. The effect of melatonin on somatotrophin (GH), thyreotrophin (TSH), and adrenocorticotrophin (ACTH) synthesis and secretion is considered. Results of in vivo and in vitro experiments show that the influence of melatonin on adenohypophysial activity depends on the animal species, age, sex, the concentration of the hormone, and the experimental conditions.

[The effect of melatonin on prolactin, luteinizing hormone (LH), and follicle-stimulating hormone (FSH) synthesis and secretion].

This paper reviews the data on the role of the pineal gland and melatonin in the regulation of hypothalamo-adenohypophysial system activity. The results of in vivo and in vitro experiments show that the effect of melatonin on prolactin, luteinizing hormone (LH), and follicle-stimulating hormone (FSH) synthesis and secretion depends on the animal species, age, sex, the concentration of the hormone, and experimental conditions. Moreover, the melatonin-responsive pars tuberalis of the pituitary is an intermediary in the control of prolactin secretion, while the melatonin-binding sites of the mediobasal hypothalamus are involved in the gonadotropic response to melatonin.