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Temperature Variation on Sulphur Removal from Laterite Nickel Leaching Residue and Iron Extraction

Nickel production for electric vehicle batteries increases by 30% every year. As the country with the most nickel production in 2021, Indonesia will operate six nickel refining plants with High-pressured acid leaching technology and one development of Step Temperature Acid Leach technology. Problems arise with many hydrometallurgical-based nickel refining plants where the leach residue will continue to accumulate and potentially pollute the soil environment. Lateritic nickel leach residue has a high Fe content reaching 44.45% in the form of hematite and an S content of around 1.3%. Besides, demand growth in the iron and steel industry is greater than the availability of its raw materials. Thus, secondary sources for raw materials for the iron and steel industry are needed. The maximum S content for steel raw materials is 0.1%, so the sulfur content in leach residue must be removed. This research focuses on removing sulfur content in lateritic nickel leach residue by roasting at a temperature of 500 °C until 1100 °C. The experiment was continued with reduction roasting at various temperature profiles. The reduced phase of the roasted leach residue sample is then compared with the reduced phase of the initial leach residue sample. Sulfur content decreases with increasing roasting temperature. Sulfur content reaches ~0% at a roasting temperature of 1100 °C. The optimum initial sample reductive roasting temperature of lateritic nickel leach residue was 1400 °C with 95.9% Fe content and 0.1% S in metal. The optimum reductive roasting temperature for 1100 °C roasted samples was 1200 °C with 94.6% Fe content and 0% S. Roasting treatment can reduce the optimum temperature for the reduction roasting process.
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An Innovative Look at Buckling of Cracked Ghraphene Nano Sheets Using Novel Extended Molecular Mechanics Method

In this paper, we take a creative look at the effect of cracking on the buckling of graphene sheets. We introduced a significant improvement in molecular mechanical calculations that more accurately examine the behavior of atomic bonds during the instability of nanostructures in the presence of defects. A molecular mechanics method based on the modified couple stress (MCS) theory to consider the size effect on the graphene plate is introduced. Primary cracks with different lengths, orientations, and numbers were examined. For each crack, buckling parameters such as critical load and buckling modes of graphene sheets were investigated. This model has better computational performance and less computational compactness than other models. Our studies show that cracks perpendicular to the load direction have a greater effect on buckling parameters, including modes and critical buckling load than cracks aligned to the critical load. Increasing the crack length will further reduce the critical buckling load. The effect of the number of cracks in two directions in buckling parameters was investigated. Increasing the number of cracks always decreases a critical buckling load. Increasing the number of cracks affects the first buckling mode more than others. The study of the eccentricity of cracks shows that with increasing the eccentricity distance, in cracks perpendicular to the loading direction, the critical buckling load will be further reduced. However, for cracks aligned with the load direction, increasing the eccentric distance has less effect on reducing the critical buckling load.
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Removal of Heavy Metals from Groundwater by Hydrous Ferric Oxide-Modified Peanut Shell

This study reports the adsorption capacity of copper Cu (II) and nickel Ni (II) of biochar obtained from peanut shell. The kinetics and equilibrium of biosorption were examined in detail. Two kinetic models (pseudo-first order and pseudo-second order) were used to correlate the experimental data and to determine the kinetic parameters. Two well-known adsorption isotherms were chosen to describe the biosorption equilibrium (Langmuir and Freundlich). The equilibrium isotherms showed that modified peanut shells possess high affinity, sorption capacity for Cu (II) and Ni (II) ions, sorption capacities of 37.443 mg/g Cu (II) and 28.626 mg/g Ni (II) biomass, respectively. All results showed that peanut shells biomass is an attractive, alternative low-cost bio sorbent for removal of heavy metal ions from aqueous media, therefore biomass materials find good application prospects.
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Benefits and Health Risks Associated with Energy Booster Drinks: A Review Study

There are several energy drinks available in the market such as Red Bull, Sting, Rebound, Power Up! Triple X Energy Drink, and so on. After the Red Bull drink was introduced in the market in1990s, Energy drinks started to gain popularity and afterwards it became a common name especially among teenagers and young adults [1]. Most energy drinks are caffeinated nonindulgent beverages that are professed to give an additional increase in energy for day-by-day work, increase alertness, and improve athletic performance and mood. There are even certain shreds of evidence present to substantiate these claims, but the effects of these drinks on mental and physical health cannot be neglected. There are reports of adverse events such as insomnia, anxiety, cardiovascular events, seizures, tachycardia, type-2 diabetes, and even death are associated with the consumption of these drinks [2]. This review will focus on energy drinks, their ingredients, health risks associated with these drinks, and will also suggest some recommendations such as changes in marketing, providing education to children regarding adverse effects of these drinks, and further research should be carried out in this domain.
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The Efficiency of Functional Activated Carbon Non-woven Fabric Filters for Fine Dust Reduction

Particulate matter (PM) concentrations are significantly higher in urban railway tunnels (178.1 μg/m3) than in metropolitan areas (49 μg/m3). Nitrogen oxide (NOx) concentrations, which are a direct cause of lung disease, have been found to exceed the atmospheric standard of the Ministry of Environment in tunnels in Korea. Dust generated by trains is scattered at high speed along tunnels, making filtration difficult. The development of filters that can be used in tunnels is urgently required. In this study, the results of using an activated carbon filter (ACF) were analyzed and compared with the laboratory-scale PM adsorption using functional activated carbon non-woven fabric filters (Cerebasel, Cerecore) that can be manufactured in Korea. The fine PM concentration, filter depth, and flow rate in the tunnel were the experimental variables. We compared PM concentrations before and after the filter experiments, and calculated the PM removal efficiency to determine the optimal conditions.
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An Innovative Study to Evaluate the Treatment Efficiency of Percutaneous Nephrolithotomy by DEA

The aim of this study was to measure the treatment efficiency of percutaneous nephrolithotomy (PNL) patients by Data Envelopment Analysis (DEA), as a novel method with an output minimizing model. Urinary stone disease is a frequent problem with increasing prevalence in recent years. Depending on the location and size, the treatment of renal stone 2 cm or more is surgical and PNL. In this context, a retrospective study in which 154 patients with kidney stones over 2 cm was conducted.
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The Pharyngeal Muscle Trainer for the Therapy of Primary Snoring -An innovative therapy approach

Snoring is a concomitant of sleeping. This phenomenon is not only considered annoying, but also often taboo because it affects the privacy of those affected. In addition, however, snoring can be the cause of sometimes life-threatening diseases, such as hypertension, stroke and myocardial infarction.
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Virulence and Comparison of Methods for Detection of Biofilm Formation by Escherichia coli Isolated from Retail Meat in Tunisia

The virulent Escherichia coli strains are responsible for extraintestinal infections. However, no past studies have been undertaken via the presence of virulence genes, ability of biofilms formation and the frequency of Escherichia coli pathovars recovered from different butcheries and slaughterhouses in Tunisia. The aims of this study was to investigate 1-) the prevalence of pathogenic E. coli strains isolated from bovine, ovine, and poultry meat in Tunisia, 2-) to determinate the antibiotic resistance profiles, and 3-) to determine their biofilm-forming ability by three phenotypic methods .Totally, 36 E. coli isolates from meat of healthy animals (bovines, ovine, and chickens) collected from different butcheries and slaughterhouses were investigated by searching by PCR genes encoding virulence factors (hlyA, stx1, stx2, fimH, papC, eaeAet papG allèle III, ibeA, iutA, and antibiotic susceptibility testing. Biofilm production was detected by three phenotypic: Congo Red Agar (CRA) method, tube method (TM) and tissue culture plate (TCP) method. In addition, the genetic relationship of isolates was determined by PFGE.
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Can Vitamin D Deficiency be a Risk Factor for Coronary Artery Disease? A Large Cross-Sectional Study of Patients Referred to Cardiovascular Clinic

Cardiovascular disease (CVD) is one of the most common causes of mortality and morbidity worldwide.Coronary artery disease (CAD) is the most common form of CVD. To prevent CAD we need to assess the risk of future CAD in all patients referred for cardiovascular care, but each of the several available systems for risk assessment has its own limitations. This study was designed to determine whether vitamin D deficiency is a potential risk factor for CAD.
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Right Ovarian Vein Thrombophlebitis Complicated by an Inferior Endocaval Floating Thrombus Revealed by Postpartum Pyrexia: A Case Report

The clinical course of our patient highlights an atypical presentation of thromboembolic disease related to pregnancy, a thrombophlebitis of the right ovarian vein with endocaval floating thrombus. The diagnosis remains difficult since it is a rare entity with an atypical presentation but with serious medical consequences.
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Immunodepletion of Multiple High-Abundant Proteins from Bovine Fluids

Immunodepletion of high-abundant proteins (HAPs) aids in the identification and analysis of low-abundant proteins (LAPs) in complex samples. Currently, immunodepletion methods for bovine samples are very limited whereas greater availability exists for human and murine animal samples. In this study, we report the simultaneous depletion of HAPs from bovine samples using an immunoaffinity depletion cartridge (the multiple affinity removal system, MARS) designed to target six human HAPs, while such a depletion kit for bovine samples is not available.
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Obesity as Behavioral Risk Factors of Chronic Noncommunicable Diseases in Young Gabonese Population

Obesity increases of prevalence of noncommunicable diseases (NCDs) in young active populations worldwide. We sought to investigate the status of young men (n=200) and women (n=200) aged from 18 to 39 years old, living at Libreville, by examining their lifestyles and eating habits, and measuring their anthropometric parameters, including, height, weight, body mass index (BMI), percentages of total muscles, lean mass, body and visceral fats, as well as metabolic age and metabolism at rest.
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Computer Simulations of Brain Oxygenation at the Microvascular Level Validating a New Role of the Arterioles

Brain physiology critically depends on constant oxygen supply to the neurons to ensure various energy–dependent functions of the central nervous system. A volume of latest experimental data on oxygen metabolism obtained with high temporal and spatial resolution, with both invasive and non-invasive methods, and the use of technologies of various degrees of sophistication, strongly suggests arteriole involvement in brain oxygenation. This new approach challenges the traditional views on brain oxygenation according to which oxygen supply to the brain tissues occurs by diffusion at the capillary level.
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Increased expression of Nppc and Npr2 in ovarian tissues from mice with polycystic ovary syndrome

Weight loss is an efficient therapy for obese polycystic ovary syndrome (PCOS) patients. Here we evaluate the effect of dietary weight reduction on clinical performance in obese PCOS patients. Medical records of fifty obese PCOS patients (age 27 ± 5 years) who had calorie-controlled dietary intervention were reviewed. The patients had a 1200-kcal/day diet until ovulation or for up to three months. Changes in body weight, body mass index (BMI), blood pressure, menstruation, acne, and hirsutusm, serum levels of endocrine hormones and adipocytokines, glucolipid metabolism index and insulin resistance were assessed. Menstrual cycle, ovulation andrelapse in the following six months were also reviewed. All patients had menstrual disorder, 43 had acne, and 26 were hirsute. After weight loss, the BMI decreased from 27.89 ± 3.06 to 25.70 ± 2.42 kg/m2 (p < 0.001). Acne and hirsutusm was improved in 39 and 14 patients, respectively. Regular menstruation was restored in 26 patients and lasted for 3.12 months on average. Endocrine hormones levels, adipocytokines levels, glucolipid metabolism and insulin resistance were shifted toward balance. Weight relapse was seen in 11 patients. No side effects occurred. Dietary intervention in obese PCOS patients can improve relevant clinical problems but weight relapse is an issue
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Case of the Successful Treatment of the Severe Form of the Ovarian Hyperstimulation

The use of gonadotropic stimulation in assisted reproductive technology programs increases the risk of developing the ovarian hyperstimulation syndrome (OHSS), which is considered as a loss of control over the ongoing ovarian stimulation. The severe forms of OHSS lead to the severe complications that threaten the patient’s life.
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Ordered Growth of Anodic Aluminum Oxide in Galvanostatic and Galvanostatic-Potentiostatic Modes

The results are presented of obtaining anodic aluminum oxide with an ordered pore arrangement by employing two anodizing modes - galvanostatic mode and combined (galvanostatic + potentiostatic) mode, at high values of the current density and voltage. Use has been made of an oxalate electrolyte and a complex electrolyte comprising oxalic acid and phosphoric acid. Scanning electron microscopy has been used to investigate the surface morphology of the barrier and porous layers and to determine pore sizes and inter-pore distance.
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Characteristic Human Scent Compounds Trapped on Natural and Synthetic Fabrics as analyzed by SPME-GC/MS

The collection of human odor volatiles is of interest to forensic applications as a path to investigate canine scent discriminations in legal investigations. A study using a selected array of previously identified human odor compounds has been conducted to determine the retention and release capabilities of five (5) natural and synthetic fabric types, cotton (mercerized fabric and gauze matrix), polyester, rayon and wool.
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Editorial Board Members Related to OVA

Giuseppe Lanza

Department of Neurology
University of Catania
Italy

Edralin A Lucas

Associate Professor
Department of Nutritional Sciences
Oklahoma State University
United States

Lufang Zhou

Lufang Zhou
Assistant Professor
The University of Alabama
Birmingham
United Kingdom

P. S. SURESH

Assistant Professor
Department of Bio-Sciences
Mangalore University
India

Michael P. Namaka

Associate Professor
Faculty of Pharmacy and Medicine
University of Manitoba
Canada

Tatjana Rundek

Professor
Miller School of Medicine
University of Miami
United States

KAZI MOHSIN

Assistant Professor
Department of Pharmaceutics
King Saud University
Saudi Arabia

Agnieszka Alicja Karczmarczyk

Assistant professor
Faculty of Civil and Environmental Engineering
Warsaw University of Life Sciences
Poland

Peter L. Bordi

Associate Professor
School of Hospitality Management
Pennsylvania State University
United States

SANTAMARIA RITA

Associate Professor
Department of Pharmacy
University of Naples Federico II
Italy
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