Appraisal of synthetic cationic Gemini surfactants as highly efficient inhibitors for carbon steel in the acidization of oil and gas wells: an experimental and computational approach.

New cationic Gemini surfactant (CGS) molecules were synthesized and investigated as anticorrosive materials for carbon steel (CS) in 1 M HCl solution by chemical, electrochemical and theoretical studies such as DFT and MDS approaches. The anticorrosion efficacy increased with the increase in the CGS concentration. It reached 95.

Absorption and desorption of hydrogen in TiCrMnFeRE: experiments, characterization and analytical interpretation using statistical physics treatment.

In this work, the absorption and desorption isotherms of hydrogen on TiCrMnFeRE (RE = La, Ce, Ho) metals were collected at three temperatures under the same experimental conditions. This was carried out in order to determine the rare earth effect on the hydrogen storage performance of the TiCrMnFe metal. The equilibrium data showing the hydrogen absorbed/released amounts per unit of absorbent mass have provided useful details to describe the absorption/desorption processes.

Novel sulphonic acid liquid crystal derivatives: experimental, computational and optoelectrical characterizations.

A novel liquid crystal homologous series based on the benzene sulphonic acid moiety, namely ()-4-((4-((4-(alkoxy)benzoyl)oxy)benzylidene)amino)benzenesulfonic acid (Sn), was synthesized and examined different experimental and theoretical measurements. The four synthesized members have terminally connected alkoxy chain groups, which vary between 6 and 12 carbons. FT-IR and NMR spectroscopy, as well as elemental analyses, were used to confirm their molecular structures.

Enhancing the inhibition and adsorption performance of SABIC iron corrosion in sulfuric acid by expired vitamins. Experimental and computational approach.

The inhibition potency of expired thiamine or vitamin B1 (VB1) and riboflavin or vitamin B2 (VB2) against SABIC iron corrosion in 0.5 M HSO solutions was investigated using chemical and electrochemical techniques. Theoretical studies such as DFT and MC simulations were performed on both VB1 and VB2 inhibitors to obtain information related to the experimental results.

It is spatial neglect syndrome, not only attention deficit! A child with spinal ependymoma post-resection misdiagnosed as having ADHD: Case report.

The neurobehavioral syndrome known as spatial neglect, which could be a result of a brain tumor, is common but difficult to diagnose and manage. This case study describes the evaluation of spatial neglect syndrome psychologically in detail and also builds an initial discussion of the role of the Arabic language, which requires a right-to-left-oriented spatial frame, to understand the severity of the symptoms. We report a case of spatial neglect syndrome after a brain tumor.

A Cross-sectional Study About Nurses' and Physicians' Experience of Disaster Management Preparedness Throughout COVID-19.

Objective: The aim of this study was to assess and compare nurses' and physicians' knowledge of disaster management preparedness. An effective health-care system response to various disasters is paramount, and nurses and physicians must be prepared with appropriate competencies to be able to manage the disaster events.

Methods: This is a cross-sectional study.

Phytochemical profiling and antioxidant potential of Royle and action against paracetamol-induced hepatotoxicity and nephrotoxicity in rabbits.

The paracetamol-induced injuries of liver and kidneys in animals are mostly used to screen out the hepato and nephroprotective effect of extract or other therapeutic agents. In the present study total phenolic and flavonoid contents, antioxidant, and hepato/nephroprotective (on paracetamol-induced intoxication in experimental rabbits) potentials of the leaves methanolic extract were determined. For the identification of possible phytochemicals, HPLC (high performance liquid chromatography) analysis was carried out and a total of eight phenolic compounds; malic acid, gallic acid, chlorogenic acid, epigallocatechin gallate, quercetin, morin, ellagic acid, and rutin were identified.

Diagnostic accuracy of reticulocyte parameters on the sysmex XN 1000 for discriminating iron deficiency anaemia and thalassaemia in Saudi Arabia.

Introduction: Iron deficient erythropoiesis and Thalassaemia are both associated with microcytic erythropoiesis albeit from different pathological mechanisms. Given the high prevalence of Hemoglobinopathies in the Mediterranean region, discriminating these two conditions is important. Several algorithms using conventional red cell indices have been developed to facilitate diagnosis, however, their diagnostic accuracy is low.

Assessment of the knowledge, attitude, and practice towards sun-exposure and skin cancer in Riyadh city, Saudi Arabia.

Background: Although there is an emergent increase in the epidemiology of skin cancer in Saudi Arabia, yet knowledge, attitude, and awareness towards skin cancer prevention measures is still poor. Therefore, the present study aimed to assess the knowledge and attitudes and practice towards skin cancer among the Saudi population, as well as, to evaluate the level of awareness relating to exposure to sunlight.

Methods: This cross-sectional survey involved 438 participants who were randomly selected from Riyadh city, Saudi Arabia.

Adamantane-linked isothiourea derivatives suppress the growth of experimental hepatocellular carcinoma inhibition of TLR4-MyD88-NF-κB signaling.

In this study, cytotoxic effects of seven adamantyl isothiourea derivatives were evaluated against five human tumor cell lines using the MTT assay. Compounds 5 and 6 were found to be the most active derivatives particularly against hepatocellular carcinoma (HCC). To decipher the potential mechanisms involved, studies were conducted in rats by inducing HCC chronic thioacetamide (TAA) administration (200 mg/kg, i.

An annotated checklist of Coccinellidae (Insecta, Coleoptera) with eight new records from the Kingdom of Saudi Arabia.

The members of Coccinellidae are among the most important biological control agents being used throughout the world. The objective of this study was to provide the current scenario of this family in Saudi Arabia. Collection surveys of ladybird individuals were conducted throughout Saudi Arabia.

Photosensitive activity of fabricated core-shell composite nanostructured p-CuO@CuS/n-Si diode for photodetection applications.

Development of photo detectors based on different semiconducting materials with high performance has been in progress in recent past, however, there is a lot of difficulties in developing the more effective photo detectors-based devices with high responsivity, detectivity and quantum efficiency. Hence, we have synthesized pure CuS and CuO@CuS core-shell heterostructure based photo detectors with high performance by simple and cost-effective two-step chemical co-precipitation method. The phase purity of CuS and CuO@CuS composite was observed by XRD analysis and the result were verified with Raman spectroscopy studies.

Venous thromboembolism prevention protocol for adapting prophylaxis recommendations to the potential risk post total knee replacement: a randomized controlled trial.

Background: Total knee replacement (TKR) is a major orthopedic surgery that is considered high risk for the development of venous thromboembolism (VTE).

Objective: The aim of this study is to evaluate the clinical outcomes that resulted from the use of a new proposed VTE risk stratification protocol for selecting a suitable extended VTE prophylaxis for post TKR surgery patients administered in conjunction with patient education programs.

Method: A randomized controlled trial was conducted in two medical centers in Saudi Arabia.

Quantitative analysis of hydrogen and chalcogen bonds in two pyrimidine-5-carbonitrile derivatives, potential DHFR inhibitors: an integrated crystallographic and theoretical study.

Two potential bioactive pyrimidine-5-carbonitrile derivatives have been synthesized and characterized by spectroscopic techniques (H and C-NMR) and the three dimensional structures were elucidated by single crystal X-ray diffraction at low temperature (160 K). In both structures, the molecular conformation is locked by an intramolecular C-H⋯C interaction involving the cyano and CH of the thiophene and phenyl rings. The intermolecular interactions were analyzed in a qualitative manner based on the Hirshfeld surface and 2D-fingerprint plots.

The role of university teaching staff members in cognitive awareness and raising the level of health protection, value, and moral of students through the COVID-19 pandemic.

This study aimed to detect the role of teaching staff members in increasing university students' awareness, health protection, moral, and value aspects through the e-learning, and to reveal the differences in the level of the teaching staff members about their roles due to the path of college, academic degree, and academic experience. To achieve these aims of the study, the descriptive method was applied. The study sample consisted of (101) teaching stuff member in health, scientific, and human specializations at Princess Nourah Bint Abdul Rahman University in Saudi Arabia.

The relationship between nurses' job crafting behaviours and their work engagement.

Aim: To investigate the relationship between job crafting and work engagement among hospital nurses.

Background: Job crafting is a relatively advanced job redesign concept, and few studies have investigated it among nurses.

Methods: This is a cross-sectional study.

Crisis and disaster management in the light of the Islamic approach: COVID-19 pandemic crisis as a model (a qualitative study using the grounded theory).

The current study sought to generate a theory from the data on crisis management in Islam, and also aimed to identify the strategies used by leaders in the crisis management process. The grounded theory approach was applied, which is one of the qualitative designs. The content of the verses of the Noble Qur'an and the hadiths of the Prophet Muhammad that dealt with the issue of crises were analyzed.

Effects of a low-energy diet with and without oat bran and olive oil supplements on body mass index, blood pressure, and serum lipids in diabetic women: A randomized controlled trial.

Type 2 diabetes is an epidemic public health issue worldwide. It is common among adults and is more severe among overweight and obese subjects. This study was conducted to evaluate the effects of a low-energy diet with and without oat bran and olive oil supplements on body mass index, blood pressure, and serum lipids in women with diabetes.

Retrograde fiberoptic endoscopy evaluation for patients with laryngeal edema.

Background: Airway and swallowing evaluation is a crucial step before weaning the patient from a tracheostomy tube. Different evaluation procedures can be used successfully in many patients, but sometimes, this can be difficult or impossible for patients who have laryngeal edema as the existence of edema tends to block the view of true vocal folds. Thus, a new approach using retrograde fiberoptic endoscopy evaluation of swallowing (FEES) has been suggested to help visualize the vocal folds clearly.

Raman scattering and red emission of Mn in LaSrNaMnTiO manganite phosphor for LED applications.

The vibrational and optical properties of an LaSrNaMnTiO (LSNMT) polycrystalline sample produced a solid-state reaction were studied. The Raman spectrum at room temperature reveals the chemical disorder in our compound. The optical gap and Urbach energy were estimated on the basis of the absorption spectrum.

Cytotoxic effect of green silver nanoparticles against ampicillin-resistant .

Considering the harmful effects and high spread of drug-resistant , many researchers have been trying to produce new antibacterial agents to combat the emergence of multidrug-resistant (MDR) strains of this bacterium. Recent progress in the nanomedicine field has provided opportunities for synthesizing unique nanoagents to battle MDR bacteria by targeting virulence and resistance signalling. The biocidal effects of 14.

Quantitative assessment of the nature of noncovalent interactions in -substituted-5-(adamantan-1-yl)-1,3,4-thiadiazole-2-amines: insights from crystallographic and QTAIM analysis.

Three adamantane-1,3,4-thiadiazole hybrid derivatives namely; -ethyl-5-(adamantan-1-yl)-1,3,4-thiadiazole-2-amine I, -(4-fluorophenyl)-5-(adamantan-1-yl)-1,3,4-thiadiazole-2-amine II and (4-bromophenyl)-5-(adamantan-1-yl)--1,3,4-thiadiazole-2-amine III, have been synthesized and crystal structures have been determined at low temperature. The structures revealed that the orientation of the amino group is different in non-halogenated structures. Intra- and intermolecular interactions were characterized on the basis of the quantum theory of atoms-in-molecules (QTAIM) approach.

Phytochemical profile and antioxidation activity of annona fruit and its effect on lymphoma cell proliferation.

Cancers of the lymphatic system are broadly classified into Hodgkin and non-Hodgkin types. Although lymphomas can be effectively treated with chemotherapy, this approach is associated with the risk of adverse side effects. High intake of certain vegetables and fruits is associated with a reduced risk of cancer development.

Perinatal Exposure to Tartrazine Triggers Oxidative Stress and Neurobehavioral Alterations in Mice Offspring.

The use of synthetic azo dyes as coloring agents in food products has dramatically increased. This study evaluated the effect of perinatal exposure to tartrazine (TZ) on mice offspring, focusing on neurobehavioral alterations and oxidative stress. The female mice received TZ (2.

Antibacterial efficacy of silver diamine fluoride as a root canal irrigant.

Objectives: Conventional disinfectants and medicaments have not been able to achieve and maintain sterilization of root canals. The purpose of the study was to evaluate the antibacterial efficacy of 3.8% silver diamine fluoride (SDF) in comparison with 2% chlorhexidine (CHX) against biofilm.