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The symbolic computation with the ansatz function and the logarithmic transformation method are used to obtain a formula for certain exact solutions of the (3+1)\left(3+1) Zakharov–Kuznetsov (Z–K) equation. We use homoclinic breather, three waves method, and double exponential. There is a conflict of results with considerably known results, which indicates the solutions found in this study are new. By selecting appropriate parameter values, 3d representations are plotted to establish W-shaped, multi-peak, and kinky breathers solutions.

The prevalence of overweight and obesity among children and adolescents in UAE was dramatically increased in the last few years, which has major public health implications. The aim of the present study was to assess knowledge, attitude, and practice towards overweight and obesity among secondary school students in Dubai. A cross sectional study was carried out in private secondary schools in Dubai using a multistage stratified random sample technique. Self administrated questionnaire was utilized to collect data about socio-demographic characteristics, knowledge, and attitude towards obesity, perception of the students about their weight, methods, and barriers of practicing weight reduction. Results revealed that 33.5% of the students had good knowledge about obesity and its complications while 44.8% had poor level. Positive attitude towards obesity and its treatment was found among 57.0% of the students with no significant gender difference. More than half of the students (56.7%) agreed that obesity is a diseaseand 72.1% agreed that obesity needs treatment. Self perception of being obese was found among 58.5% of the students, and the majority (72.6%) did not practice any weight reduction before. Females had significantly higher rate of practicing weight reduction compared to males. The most common barriers against practicing weight reduction were lack of knowledge about the methods (47%), lack of time (25%), and lake of interest or support (23.2%). Female gender and higher education of the mother were independent predictors of good knowledge about obesity, while higher education of the mother was an independent predictor for student's positive attitude towards obesity. Utilization of the mass media to enhance the level of community knowledge about obesity and its complications was recommended. Health education materials should be delivered to present and future mothers. School health programs should include interventions to improve knowledge, attitude, and practice of the students towards obesity.

Amino phosphonic acids are good heavy metal extractants for liquid–liquid extraction, but this method requires the use of an organic solvent, which is itself a pollutant. The incorporation of these acids in solid supports gave us the opportunity to find a solution to this problem. The synthesis of the new material by incorporation of Amino-Cyclo-Hexyl Phosphonic Acid into the interlayer space of the Ni/Al-LDH, designated as Ni/Al-ACHPA, was carried out by the coprecipitation method and anion exchange. The new hybrid material was characterised by FTIR, XRD and BET. The results obtained show that ACHPA is well intercalated in LDH. The adsorption performance of the new hybrid material towards the ions of Cerium Ce+3, has been investigated under different parameters. Under optimal conditions, where the highest recovery (75%) was obtained at pH 6 using 0.1 g of adsorbent (Ni/Al-ACHPA) for less than 30 min of agitation. The modelling results of the kinetics indicate that the Ce+3 adsorption process mechanism is well fitted by a pseudo-second order equation with a high regression coefficient (R2 = 99%) and the adsorption isotherms were fitting well with the Freundlich isotherm model. [ABSTRACT FROM AUTHOR]

Graphite is a stack of carbon layers where carbon atoms form hexagons in a honeycomb structure. Graphene on the other hand is a single atom thick layer which offers unique physical, chemical and biological properties compared to graphite. Recycling graphite waste and converting it into graphene or graphène oxide may offer many economic, environmental and health benefits, and may also be used in many applications. Graphite has been used widely in iron-steel, chemical, and nuclear industries for electrical, mechanical and other applications (e.g., metallurgy, pencil, coatings, lubricants and paint), and especially, most of the mold materials of drilling are made of graphite. The major goal of this study is to produce recycled graphène oxide from graphite waste recovered from the drilling mold by using Hummer's method. In this study, graphite-based tailings recovered from drilling mold were collected from local waste collection companies after the sieving and cleaning processes, the resulting graphite is exfoliated in a single layer using a chemical exfoliation process. We herein present a simple, fast, efficient and environmentally friendly technique to prepare graphene oxide (GO) from graphite residues recovered from the drilling mold by using Hummer's method. Complete characterizations of the properties of GO films have been performed. SEM and Raman analyzes showed that the GO sheets prepared in this study had a double-layered and multilamellar structure. X-ray diffraction (XRD) was chosen to measure the crystal structure of our materials. A Fourier transform infrared (FT-IR) spectrum analyzer was used to certify the presence of oxygen-containing functional groups in GO films. The chemical structure of the GO sheet was described in this study. Discussion and references for further research on graphene are provided. [ABSTRACT FROM AUTHOR]

Seen the important utility of Graphene Oxide (OG) in various fields; This prestigious material has been synthesized by following the hummer method modified by recycling graphite rods from electrical storage devices and characterized by different characterization methods such as: Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (DRX), and scanning electron microscope (SEM) to be able to see the structure and morphology of the synthesized material. The study of the elimination of mercuric ions (Hg2+) by OG was verified by a parametric, a thermodynamic and a kinetic study. The results showed that this adsorption is exothermic, spontaneous with an order between the adsorbent and the adsorbate and that the adsorption process follows the Langmuir model with pseudosecond-order kinetics. The best yield in this study was 75 % under the optimal conditions. [ABSTRACT FROM AUTHOR]