Effect of the Monthly Injectable Combined Contraceptives versus Oral Contraceptive Pills on Mood

Ghada M. Khafagy,Hebatallah L. Shalaby,Nagwa E. Saad,Marwa D. Hasan 대한가정의학회 2021 Korean Journal of Family Medicine Vol.42 No.6

Background: Contraceptive agents are widely used by women of reproductive age, and resulting depression is the most common side effect of this usage. This study aimed to study the effect of monthly injectable combined contra-ceptives versus that of combined oral contraceptive pills (COC) on patients’ mood.Methods: A prospective cohort study was conducted on 124 females aged 18–45 years attending the Kom-Ashfeen Family Medicine Unit, El-Kalyubia, Egypt. Participants were divided into three groups according to their choice: group A included 44 participants who received monthly combined injectable contraceptives (CIC); group B includ-ed 40 participants who took COC; and group C included 40 participants who used the copper intrauterine device (IUD). The Patient Health Questionnaire-9 (PHQ-9) score was assessed at the beginning of the study and after 6 months of follow-up.Results: After 6 months of follow-up, there were mild but statistically significant increases in the PHQ-9 score in groups A and B, with group A (CIC users) showing the highest increase. Approximately 34.1%, 27.5%, and 15% of CIC, COC, and IUD users, respectively, moved from the non-depression stage to mild depression after 6 months; this change was statistically significant in groups A and B only.Conclusion: Monthly injectable combined contraceptives and oral contraceptive pills were associated with an in-creased risk of developing mild depression; this risk was higher in users of CICs, although the difference was not statistically significant. Thus, it is crucial to counsel patients about this possible risk and to follow them up. Howev-er, further studies are required to confirm our results.

The novel polythiadiazole polymer and its composite with a-Al(OH)3 as inhibitors for steel alloy corrosion in molar H2SO4: Experimental and computational evaluations

Hany M Abd El-lateef,K. Shalabi,Abdelwahed R. Sayed,Sobhi M. Gomha,Esam M. Bakir 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.105 No.-

Polymer/composite materials have been commonly used as corrosion inhibitors in different fields such asmarine, oil field, and engineering industry due to their self-healing and thermal stability features. Herein,novel polythiadiazole, namely poly[(2,6-dicarbonylpyridine)(2,5-dihydrazinyl-1,3,4-thiadiazole)] (AMTP)via the interaction of 2,5-dihydrazinyl-1,3,4-thiadiazole with pyridine-2,6-dicarbonyl dichloride and itscomposite with a-Al(OH)3-gel were designed in a good yield. The structures of the fabricated materialsare characterized by FT-IR, NMR, SEM, and UV–Vis analyses. The protective action of AMTP and a-Al(OH)3@AMTP on the C1018-steel corrosion in molar-sulphuric acid was evaluated by potentiodynamicpolarization(PDP) and electrochemical impedance spectroscopic (EIS) methods. PDP findings presentedthat the AMTP polymer and a-Al(OH)3@AMTP composite performed as mixed-type inhibitors. The protectioncapacities of 90.3 and 97.6% were obtained in the presence of optimum dose 100 mg/L ofAMTP polymer and a-Al(OH)3@AMTP composite, respectively. The compound’s adsorption on C1018-steel follows the Langmuir isotherm model. The SEM/EDX outcomes reveal that the C1018-steel interfaceis inhibited by AMTP polymer and a-Al(OH)3@AMTP composite. DFT calculations exhibited that the efficiencyof the prepared materials correlates well with their electron contributing capability, whereas simulationsof Monte Carlo exposed that the favorability and extent of adsorption of additive moleculesmetal interface establish their corrosion protection routines.

The role of type II FB (I):Tl+ defect in laser light generation and color image formation at the low coordination surface sites of AgBr: ab initio calculations

A.S. Shalabi,A.S. Algaber,N.K. Madi,Kh.M. Eid,Z.M. Fathy 한국물리학회 2006 Current Applied Physics Vol.6 No.1

The role of type IIFB (I):Tl+ color center at low coordination surface sites of AgBr thin lms in providing tunable laser activitystructure calculations. Clusters of variable sizes were embedded in simulated Coulomb elds that closely approximate the Madelungelds of the host surfaces, and ions that are the nearest neighbors to theFB defect site were allowed to relax to equilibrium in eachcase. The calculated Stokes shifted optical transition bands suggest that laser activity is relatively weak and fades quickly as thecoordination number of the surface ions decreases from 5 (at) to 4 (edge) to 3 (corner). An attempt has been made to explain thesesurfaces were deep below the lower edges of the conduction bands of the ground-state defect-free surfaces indicating that type IIFB(I):Tl+ is suitable laser defect. The probability of orientational destruction of the two centers, attributed to the assumed saddlepoint ion congurations along theh110i axis, was found to decrease as the coordination number of the surface ions decreases. Thepossibility of exciton (energy) transfer between sites of dierent coordination numbers was claried. The GlasnerTompkins empir-ical relation was generalized to include type IIFB (I):Tl+ doped surfaces. As far as photographic sensitization is concerned, a super-sensitizer increases the sensitizing capabilities of the two examined dye molecules by increasing the relative yield of quantumeciencyU.FA sensitizes the low coordination surface sites of the defect free AgBr by lowering the bottoms of the conductionbands. The dierence in the sensitizing capabilities between the two examined dyes was estimated by calculating the quasi Fermilevels.

FA1:La2+ and FA2:Sc2+ color center lasers and color image sensitization at the low coordination (0 0 1)surface of AgBr by ab initio calculations

A.S.Shalabi,I.A.Z.Al-Ansari,K.Kh.Al-Naimi,M.M.Shalaby,W.S.Abdel Halim 한국물리학회 2004 Current Applied Physics Vol.4 No.5

FA(Ga+, In+, Tl+) tunable laser activity and interaction of halogen atoms (F, Cl, Br, I, At) at the (001) surface of KCl crystal:ab initio calculations

A.S.Shalabi,T.F.El-Essawy,M.M.Assem,S.Abdel-Aal,A.M.El-Mahdy 한국물리학회 2002 Current Applied Physics Vol.2 No.2

An attempt has been made to examineFA(Gaþ ;Inþ ;Tlþ ) tunable laser activity and adsorptivity of halogen atoms (F;Cl;Br;I;At)at the (001) surface of KCl crystal using an embedded cluster model, CIS and density functional theory calculations with eectivecore potentials. The ion clusters were embedded in a simulated Coulomb eld that closely approximates the Madelung eld at thehost surface. The nearest neighbor ions to the defect site were then allowed to relax to equilibrium. Based on the calculated strengthFA(Tlþ ) center was found to be the most laser active inagreement with the experimental observation that the optical emissions ofFA(Inþ ) and FA(Gaþ ) centers were strongly quenched.The disappearance of the anisotropy and np splitting observed in the absorption ofFA(Gaþ ;Inþ ;Tlþ ) centers were monotonicallyincreasing functions of the size of the impurity cation. TheFA(Gaþ ;Inþ ;Tlþ ) defect formation energies followed the orderFAðGaþ Þ> FAðInþ Þ> FAðTlþ Þ. The GlasnerTompkins empirical relationship between the principal optical absorption ofFcentersin solids and the fundamental absorption of the host crystal was generalized to include the positive ion species. As far as the ad-sorptivity of the halogen atoms is concerned, theF and FA(Inþ ;Tlþ physical adsorption to chemical adsorption. The adsorption energies were monotonically increasing functions of the electroneg-ativity of the halogen and the amount of charge transferred from the defect-free surface. The calculated adsorption energies wereexplainable in terms of the electron anity, the eective nuclear charge and the electrostatic potentials at the surface. The spinpairing mechanism played the dominant role in the course of adsorbatesubstrate interactions and the KCl defect-free surface can bemade semiconducting byF or FA(Inþ ;Tlþ ) surface imperfections.. 2001 Elsevier Science B.V. All rights reserved.

Parametric study of shear strength of CFRP strengthened end-web panels

Haitham A. Shalaby,Maha M. Hassan,Sherif S. Safar 국제구조공학회 2019 Steel and Composite Structures, An International J Vol.31 No.2

Strengthening of civil infrastructure with advanced composites have recently become one of the most popular methods. The use of Fiber Reinforced Polymer (FRP) strips plates and fabric for strengthening of reinforced concrete structures has well established design guidelines and standards. Research on the application of FRP composites to steel structures compared to concrete structures is limited, especially for shear strengthening applications. Whereas, there is a need for cost-effective system that could be used to strengthen steel high-way bridge girders to cope with losses due to corrosion in addition to continuous demands for increasing traffic loads. In this study, a parametric finite element study is performed to investigate the effect of applying thick CFRP strips diagonally on webs of plate girders on the shear strength of end-web panels. The study focuses on illustrating the effect of several geometric parameters on nominal shear strength. Hence, a formula is developed to determine the enhancement of shear strength gained upon the application of CFRP strips.

The Effect of Feeding Mannan-Oligosaccharides (Bio-MOS) on the Performance of Meat Chickens under Two Different Vaccination Programs

Shafey, T.M.,Al-Mufarej, S.,Shalaby, M.I.,Jarelnabi, A.J. Asian Australasian Association of Animal Productio 2001 Animal Bioscience Vol.14 No.4

The effects of feeding a mannan oligosaccharide (Bio-Mos) from 0 to 3 g/kg diet and vaccination program on 1- to 35-day performance (growth and feed efficiency), metabolizable energy, nitrogen utilization and carcass composition of meat chickens were investigated. A general vaccination program was used against IB, IBD and ND with half of the birds per diet receiving a booster dose of IB and ND vaccines at 12 days of age. Dietary supplementation of Bio-Mos (BM) did not influence body weight gain, feed efficiency and nutrient utilization. The highest dietary BM (3 versus 1.5 or 0 g/kg) increased carcass abdominal fat and reduced the proportion of drumstick in the carcass of meat chickens. The booster dose reduced the performance of birds. It was concluded that the addition of BM to the diet of chickens did not significantly influence the performance and nutrient utilization of meat chickens.

A Novel RGB Image Steganography Using Simulated Annealing and LCG via LSB

Bawaneh, Mohammed J.,Al-Shalabi, Emad Fawzi,Al-Hazaimeh, Obaida M. International Journal of Computer ScienceNetwork S 2021 International journal of computer science and netw Vol.21 No.1

The enormous prevalence of transferring official confidential digital documents via the Internet shows the urgent need to deliver confidential messages to the recipient without letting any unauthorized person to know contents of the secret messages or detect there existence . Several Steganography techniques such as the least significant Bit (LSB), Secure Cover Selection (SCS), Discrete Cosine Transform (DCT) and Palette Based (PB) were applied to prevent any intruder from analyzing and getting the secret transferred message. The utilized steganography methods should defiance the challenges of Steganalysis techniques in term of analysis and detection. This paper presents a novel and robust framework for color image steganography that combines Linear Congruential Generator (LCG), simulated annealing (SA), Cesar cryptography and LSB substitution method in one system in order to reduce the objection of Steganalysis and deliver data securely to their destination. SA with the support of LCG finds out the optimal minimum sniffing path inside a cover color image (RGB) then the confidential message will be encrypt and embedded within the RGB image path as a host medium by using Cesar and LSB procedures. Embedding and extraction processes of secret message require a common knowledge between sender and receiver; that knowledge are represented by SA initialization parameters, LCG seed, Cesar key agreement and secret message length. Steganalysis intruder will not understand or detect the secret message inside the host image without the correct knowledge about the manipulation process. The constructed system satisfies the main requirements of image steganography in term of robustness against confidential message extraction, high quality visual appearance, little mean square error (MSE) and high peak signal noise ratio (PSNR).

Phytochemical composition, protective and therapeutic effect on gastric ulcer and a-amylase inhibitory activity of Achillea biebersteinii Afan.

Howaida I. Abd-Alla,Nagwa M. M. Shalaby,Manal A. Hamed,Nagy Saba El-Rigal,Samira N. Al-Ghamdi,Jalloul Bouajila 대한약학회 2016 Archives of Pharmacal Research Vol.39 No.1

Three sesquiterpene lactones [two germacranolides (micranthin and sintenin) and one guaianolide (4b,10adihydroxy- 5b,7b,8bH-guaia-1,11(13)dien-12,8a-olide)] and four derivatives of 3-methoxy flavones (santin, quercetagetin- 3,6,30-trimethyl ether, quercetagetin-3,6-dimethyl ether, and 5,7 dihydroxy 3,30,40-trimethoxy flavone) were isolated from the ethyl acetate extract (EAE) of the aerial parts of Achillea biebersteinii Afan. (Asteraceae). Evaluation of protective and therapeutic effects of EAE against ethanol-induced gastric ulcer in rats was carried. Antiulcer activity evaluation was done through measuring ulcer indices, stomach acidity, gastric volume and lesion counts. Oxidative stress markers; malondialdehyde, glutathione and superoxide dismutase were also estimated. The work was extended to determine the histopathological assessment of the stomach. Gastric ulcer exhibited a significant elevation of the ulcer index and oxidative stress markers. The extract attenuated these increments and recorded protective and therapeutic effects against gastric ulcer. Hyperglycaemia increases the mucosal susceptibility to ulcerogenic stimuli and predisposes gastric ulceration. In vitro a-amylase inhibitory assay was applied to evaluate the post prandial antihyperglycaemia activity. The result showing that the EAE has the ability to reduce starch-induced postprandial glycaemic excursions by virtue of potent intestinal a-amylase inhibitory activity. These findings demonstrated the remarkable potential of A. biebersteinii as valuable source of antiulcer agent with post prandial hyperglycaemia lowering effect.

Computational, kinetic, and electrochemical studies of polyaniline functionalized ZnO and ZnO-SiO2 nanoparticles as corrosion protection films on carbon steel in acidic sodium chloride solutions

May Ahmed Al-Masoud,Mai M. Khalaf,Ibrahim M. A. Mohamed,K. Shalabi,Hany M Abd El-lateef 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.112 No.-

Two novel nanocomposites based on polyaniline functionalized ZnO and ZnO-SiO2 nanoparticles(ZnO@PANi and ZnSiO@PANi) were synthesized, characterized, and evaluated as protective films for steelpipelines in the pickling process at 25–55 C. The prepared nanocomposites were described using differentspectroscopic characterization methods including UV–vis, FTIR, DLS, XPS methods, and other physicochemicaltechniques including XRD, FESEM, and HR-TEM. The novelty of these films is in the fact thatthe ZnO and ZnO-SiO2 nanoparticles are functionalized by polyaniline which is electrochemically stablein acidic solution and has high conductivity. Electrochemical systems such as open circuit potentials(OCP), electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization (PDP) were utilizedto attain the kinetics and mechanistic findings of the corrosion protection route. The outcomes indicatethat the two fabricated ZnO@PANi and ZnSiO@PANi are efficient acidic corrosion inhibitors. Theprotection performance of ZnSiO@PANi (98.6%) was more pronounced at a dose (150 mg/L) thanZnO@PANi (92.3%) and individual PANi (83.4%) as achieved from PDP findings. The effect of temperatureand flowing conditions reinforces further the performance of both nanocomposites. Surface characterizationusing FESEM/EDS delivered more indication for the steel surface protection with the ZnO@PANi andZnSiO@PANi nanocomposites. Molecular modeling using DFT calculations and MC simulations supportedthe experimental findings. The binding energies of the compounds and Fe interface follow the order ofZnO@PANi > ZnSiO@PANi, which is in good agreement with the empirical results. An important suggestionof these results is the probability of substituting traditional toxic small molecules with cost-effectiveand non-toxic polymeric nanocomposites as protective films for use in the oil and gas industry.