Production of Smart Cotton-nickel Blend Fibers Using Functional Polymers Comprising Ammonium Polyphosphate and Silicone Rubber

Mehrez E. El-Naggar,Ola A. Abu Ali,Dalia I. Saleh,K. M. Abu-alnja,Abd-allah M. Mnsour,Mohammed A. Abu-Saied,Tawfik A. Khattab 한국섬유공학회 2022 Fibers and polymers Vol.23 No.6

Despite the fact that Pyrovatex is widely used as a commercial flame-retardant, the release of toxic formaldehyderemains a serious problem. Fluorine-based compounds, on the other hand, have been employed to impart hydrophobic textilesurfaces, although they are exceedingly costly and poisonous. Based on those difficulties, we describe a simple one-stepmethod for coating electrically conductive cotton-nickel (Cot-Ni) blend fabric providing flame-retardant and water-repellentcharacteristics. A nickel ribbon was firstly bent around a cotton yarn as a core, and then woven into an electrically conductiveCot-Ni blend fabric, which was created by weaving the cotton-nikel hybrid threads with regular cotton yarns. The conductivefabric was coated with a composite consisting of silicone rubber (RTV) and ammonium polyphosphate (APP). The strongbinding of RTV with both APP and cotton fibres increased the flame-retardant action of cotton, according to the findings. Asa result, varied concentrations of APP were used in the composite to show that only 100 g/l of APP combined with RTVimproved the fire-retardancy. Depending on the concentration of APP, distinct hierarchical morphologies appeared on thesurface of the coated Cot-Ni fabrics. RTV also improved the hydrophobic character of the blend surface. Measurements of airpermeability, surface roughness, and stiffness were used to investigate the comfort qualities of the coated Cot-Ni blends. Eventually, those multifunctional (Cot-Ni)/RTV-APP textiles might be used in a variety of applications, such as grain storagecontainers, car seat mats, and firefighters' uniforms.

Design of PID Controller with Grid Connected Hybrid Renewable Energy System Using Optimization Algorithms

Saleh B.,Yousef Ali M.,Ebeed Mohamed,Abo-Elyousr Farag K.,Elnozahy Ahmed,Mohamed Moayed,Abdelwahab Saad A. Mohamed 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.6

The main target of this paper is to allow renewable energy resources (RES) to participate eff ectively within hybrid micro grids via an optimal proportional integral- derivative (PID) controller. This paper proposes two techniques of optimal PID controllers in a hybrid renewable generation energy system. These techniques are particle swarm optimization (PSO) and lightning attachment procedure optimization (LAPO). The hybrid renewable generation energy system in this study includes a photovoltaic source, wind turbine, and battery storage, which are connected to a point of common coupling via DC/DC boost converters. The controller at the inverter consists of a current controller and voltage source controller, which results in three PID gains at each controller. In order to obtain the PID gains, a time domain objective function is formulated in terms of the voltage, and current errors. The obtained results with the individual advanced optimization LAPO and PSO algorithm are compared. The results display that the developed LAPO algorithms give better results compared to the conventional PSO at the input and output current, voltage, and power. All the results have been taken under several operating conditions of wind turbine (wind speed) and solar sun (changing irradiance and temperature).

Anti-tumor Promoting Activity of Some Malaysian Traditional Vegetable (Ulam) Extracts by Immunoblotting Analysis of Raji Cells

A. M. Ali,L. Y. Mooi,K. Yih Yih,A. W. Norhanom,K. Mat Saleh,N. H. Lajis,A. M. Yazid,F. B. H. Ahmad,U. Prasad 한국생약학회 2000 Natural Product Sciences Vol.6 No.3

The extracts of Carica papaya (flower), Barringtonia macrostachya (leaves), Coleus tuberosus (tuber), Mangifera indica (fruit skin) and Eugenia polyantha (leaves) showed strong in vitro anti-tumor promoting activity when assayed using Raji cells (Mooi et al., 1999). The anti-tumor promoting activity of the crude extracts was further analyzed by immunoblotting analysis of Raji cells carrying Epstein-Barr virus genome. The expression of early antigens diffuse (EA-D) and early antigens restricted (EA-R) was determined by performing western blotting of treated Raji cells with human sera of nasopharyngeal carcinoma patients. All the plant extracts were shown to be able to suppress both EA-D and EA-R.

Impact of fine particles on the rheological properties of uranium dioxide powders

Madian A.,Leturia M.,Ablitzer C.,Matheron P.,Bernard-Granger G.,Saleh K. 한국원자력학회 2020 Nuclear Engineering and Technology Vol.52 No.8

This study aims at characterizing the rheological properties of uranium oxide powders for nuclear fuel pellets manufacturing. The flowability of these powders must be compatible with a reproducible filling of press molds. The particle size distribution is known to have an impact on the rheological properties and fine particles (<100 mm) are suspected to have a detrimental effect. In this study, the impact of the particle size distribution on the rheological properties of UO2 powders was quantified, focusing on the influence of fine particles. Two complementary approaches were used. The first approach involved characterizing the powder in a static state: density, compressibility and shear test measurements were used to understand the behavior of the powder when it is transitioned from a static to a dynamic state (i.e., incipient flow conditions). The second approach involved characterizing the behavior of the powder in a dynamic state. Two zones, corresponding to two characteristic behaviors, were demonstrated for both types of measurements. The obtained results showed the amount of fines should be kept below 10 % wt to ensure a robust mold filling operation (i.e., constant mass and production rate).

Potential therapeutic and pharmacological strategies for SARS-CoV2

Ghareeb Doaa A.,Saleh Samar R.,Nofal Mohammed S.,Kaddah Mohamed M. Y.,Hassan Salma. F.,Seif Inas K.,El-Zahaby Sally A.,Khedr Shaimaa M.,Kenawy Marwa Y.,Masoud Aliaa A.,Soudi Salma A.,Sobhy Ahmed A.,Se 한국약제학회 2021 Journal of Pharmaceutical Investigation Vol.51 No.3

Background At the end of 2019, the new Coronavirus disease 2019 (COVID-19) strain causing severe acute respiratory syndrome swept the world. From November 2019 till February 2021, this virus infected nearly 104 million, with more than two million deaths and about 25 million active cases. This has prompted scientists to discover effective drugs to combat this pandemic. Area covered Drug repurposing is the magic bullet for treating severe acute respiratory syndrome coronavirus 2 (SARSCoV2). Therefore, several drugs have been investigated in silico, in vitro, as well as through human trials such as anti- SARS-CoV2 agents, or to prevent the complications resulting from the virus. In this review, the mechanisms of action of different therapeutic strategies are summarized. According to the WHO, different classes of drugs can be used, including anti-malarial, antiviral, anti-inflammatory, and anti-coagulant drugs, as well as angiotensin-converting enzyme inhibitors, antibiotics, vitamins, zinc, neutralizing antibodies, and convalescent plasma therapy. Recently, there are some vaccines which are approved against SARS-CoV2. Expert opinion A complete understanding of the structure and function of all viral proteins that play a fundamental role in viral infection, which contribute to the therapeutic intervention and the development of vaccine in order to reduce the mortality rate.

An FPGA Based Temperature Controller for Differential Thermal Analyzer

T. Nandha Kumar,Tarek Mohd A.K AL Saleh,,SRS.Prabaharan,Haider A.F. Mohamed 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8

Differential Thermal Analyzer (DTA) is an instrument used to characterize the new materials and it worksbased on the themoanalytic qualitatively technique. In this paper a digital design of a programmable temperature controller for the DTA has been presented. This programmable controller has been designed using very high speedintegrated circuit hardware description language (VHDL) and implemented in a field programmable gate array (FPGA). The heating rate of the DTA can be flexibly selected from the range between 1°C per minute and 15°C per minute. Also, the temperatures are measured with the accuracy of 0.125 degrees. The sampling time between the reference and thefeedback temperatures of the controller has been designed for 2.56 seconds. The simulations and experimental results of the proposed temperature controller are presented.

The effect of alpha-lipoic acid supplementation on anthropometric, glycemic, lipid, oxidative stress, and hormonal parameters in individuals with polycystic ovary syndrome: a systematic review and meta-analysis of randomized clinical trials

Ahmed Abu-Zaid,Saeed Baradwan,Ibtihal Abdulaziz Bukhari,Abdullah Alyousef,Mohammed Abuzaid,Saleh A. K. Saleh,Heba M. Adly,Osama Alomar,Ismail Abdulrahman Al-Badawi 대한산부인과학회 2024 Obstetrics & Gynecology Science Vol.67 No.1

This systematic review and meta-analysis aimed to examine the effect of the antioxidant alpha-lipoic acid (ALA) on various cardiometabolic risk factors and hormonal parameters in patients with polycystic ovary syndrome (PCOS). We searched PubMed, EMBASE, SCOPUS, Cochrane Library, and Web of Science databases without language restrictions until May 2023 to find randomized controlled trials (RCTs) that assessed the impact of ALA supplementation on anthropometric, glycemic, lipid, oxidative stress, and hormonal parameters in women with PCOS. Outcomes were summarized using the standardized mean difference (SMD) and 95% confidence interval (CI) in a random-effects model. An I2 statistic of >60% established significant between-study heterogeneity. The overall certainty of the evidence for each outcome was determined using the grading of recommendations, assessment, development, and evaluations system. Seven RCTs met the inclusion criteria. The ALA group had significant reductions in fasting blood sugar (fasting blood sugar (FBS), n=7 RCTs, SMD, -0.60; 95% CI, -1.10 to -0.10; I2=63.54%, moderate certainty of evidence) and homeostatic model assessment for insulin resistance (homeostatic model assessment of insulin resistance (HOMA-IR), n=4 RCTs, SMD, -2.03; 95% CI, -3.85 to -0.20; I2=96.32%, low certainty of evidence) compared with the control group. However, significant differences were observed between the groups in body mass index, insulin, estrogen, follicle-stimulating hormone, luteinizing hormone, testosterone, low-density lipoprotein, highdensity lipoprotein, triglyceride, total cholesterol, malondialdehyde, or total antioxidant capacity profiles. ALA supplementation improves FBS and HOMA-IR levels in women with PCOS. ALA consumption is an effective complementary therapy for the management of women with PCOS.