Prevalence and pattern of skin disorders among children living in orphanages in Fayoum and Giza governorates, Egypt.

Background: Childhood is a crucial period that shapes a person's growth and development. For orphans, a lack of familial support affects their upbringing, making orphanages crucial for care. Children living in orphanage centers are vulnerable to several conditions, including dermatological disorders, due to factors such as malnutrition, overcrowding, and poor hygiene.

Development of an ethanol-free salbutamol sulfate metered-dose inhaler: Application of molecular dynamic simulation-based prediction of intermolecular interaction.

Introduction: More than fifty years after the commercialization of the Ventolin metered-dose inhaler (MDI), its constituent active ingredient, salbutamol sulfate (SS), remains the most prescribed short-acting beta agonist for the first-line treatment of acute asthma attacks and the metered-dose inhaler remains its primary dosage form. The first generation of Ventolin MDI was developed at a time when environmental and regulatory concerns were less stringent than today. The MDI industry is now on the verge of a second major reformulation effort in response to environmental concerns.

Green synthesis of silver nanoparticles using aqueous extract of and its antibacterial activity.

Aims: The aim of this research is to conduct green synthesis of silver nanoparticles in an eco-friendly, economical and more effective approach using plant extract as well as to study the effects of the preparation conditions on the size of synthesized nanoparticles and its antibacterial activity.

Methodology: In this study, silver nanoparticles have been synthesized by reduction method using aqueous silver nitrate solution and aqueous extract of . Then, their characterization has been studied by several methods, such as visual inspection, UV-Vis spectroscopy, dynamic light scattering and scanning electron microscope.

Assessment of patient safety culture among paramedical personnel at general and district hospitals, Fayoum Governorate, Egypt.

Background: Healthcare is a high-risk industry that requires regular assessment of patient safety climate within healthcare organizations. This addresses the organizational cultural issues and explores the association between organizational climate and patient outcomes. This study aimed to assess patient safety culture among paramedical health employees at Fayoum general and district hospitals and to determine factors affecting their perception of patient safety.

Erratum.

[This corrects the article DOI: 10.1159/000443575.].

The Antidepressant Effect of L-Tyrosine-Loaded Nanoparticles: Behavioral Aspects.

Background: Depression has been linked to disruption in the cerebral levels of specific neurotransmitters. L-tyrosine is a precursor of more than one of the neurotransmitters affected by depression. Even though setbacks of monoamines precursors include high doses and low efficiency, many studies have suggested using L-tyrosine as antidepressant.

Stability study and lyophilization of vitamin E-loaded nanocapsules prepared by membrane contactor.

In this research, we studied the accelerated stability of vitamin E-loaded nanocapsules (NCs) prepared by the nanoprecipitation method. Vitamin E-loaded NCs were optimized firstly at the laboratory scale and then scaled up using the membrane contactor technique. The optimum conditions of the membrane contactor preparation (pilot scale) produced vitamin E-loaded NCs with an average size of 253 nm, polydispersity index 0.

Preparation of vitamin E loaded nanocapsules by the nanoprecipitation method: from laboratory scale to large scale using a membrane contactor.

Vitamin E or α-tocopherol is widely used as a strong antioxidant in many medical and cosmetic applications, but is rapidly degraded, because of its light, heat and oxygen sensitivity. In this study, we applied the nanoprecipitation method to prepare vitamin E-loaded nanocapsules, at laboratory-scale and pilot-scale. We scaled-up the preparation of nanocapsule with the membrane contactor technique.

Sulfated and non-sulfated amphiphilic-beta-cyclodextrins: impact of their structural properties on the physicochemical properties of nanoparticles.

Purpose: The aim of this work was to study the preparation of nanospheres from amphiphilic beta-cyclodextrins formed (a) by different acylation degrees (DA) at the secondary hydroxyl face (DA=14 and 21) followed by varying (b) the sulfatation degrees (DS) at the primary hydroxyl face (DS=0, 4 and 7).

Methods: The physicochemical properties of the synthesized compounds such as molecular weights, the theoretical HLB values and the critical micellar concentration values and their surface area were presented. The nanoparticles prepared from amphiphilic beta-cyclodextrins were characterized by mean size, zeta potential and their morphology.

Freeze-drying of nanoparticles: formulation, process and storage considerations.

Freeze-drying has been considered as a good technique to improve the long-term stability of colloidal nanoparticles. The poor stability in an aqueous medium of these systems forms a real barrier against the clinical use of nanoparticles. This article reviews the state of the art of freeze-drying nanoparticles.

Freeze-drying of nanocapsules: impact of annealing on the drying process.

Freeze-drying process was recently applied to improve the long-term storage stability of nanocapsules. Thermal treatment by annealing is an interesting process to optimize a freeze-drying cycle of these colloidal vectors. The objective of this paper is to investigate the impact of annealing on primary and secondary drying characteristics and on nanocapsules (NC) properties.

Investigation of nanocapsules stabilization by amorphous excipients during freeze-drying and storage.

Freeze-drying was recently applied to improve the long-term storage stability of nanoparticles. Nanocapsules have a thin polymeric envelope that may not withstand the stresses of such process. So, cryoprotectants and lyoprotectants are usually added to the formulation to protect these vectors during freezing and desiccation steps.

A pilot study of freeze drying of poly(epsilon-caprolactone) nanocapsules stabilized by poly(vinyl alcohol): formulation and process optimization.

A common limitation of using polymeric nanoparticles in aqueous suspension is due to their poor chemical and physical stability when conserved for a long time. Therefore, freeze drying of these colloidal systems is an alternative method to achieve long-term stability. Nanocapsules have thin and fragile shell structure, which may not resist to the stress of such process.

Scanning electron microscopy and atomic force microscopy imaging of solid lipid nanoparticles derived from amphiphilic cyclodextrins.

Scanning electron microscopy (SEM) and atomic force microscopy (AFM) have been applied to the imagery of solid lipid nanoparticles (SLNs) formulated from an amphiphilic cyclodextrin, 2,3-di-o-alkanoyl-beta-cyclodextrin, beta-CD21C6. Comparison of the results shows that the vacuum drying technique used in sample preparation for SEM causes shrinkage in the size of the SLNs, whereas the deposition method used for AFM causes the SLNs to form small clusters. The hydrodynamic diameter determined from photon correlation spectroscopy (PCS) is 359+/-15 nm and the zeta potential is -25 mV.