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Ternary glycerol-based deep eutectic solvents: Physicochemical properties and enzymatic activity
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The present study investigates deep eutectic solvents (DESs) as potential media for enzymatic hydrolysis. A series of ternary ammonium and phosphonium-based DESs were prepared at different molar ratios by mixing with aqueous glycerol (85%). The physicochemical properties including surface tension, conductivity, density, and viscosity were measured at a temperature range of 298.15 K – 363.15 K. The eutectic points were highly influenced by the variation of temperature. The eutectic point of the choline chloride: glycerol: water (ratio of 1: 2.55: 2.28) and methyltriphenylphosphonium bromide:glycerol:water (ratio of 1: 4.25: 3.75) is 213.4 K and 255.8 K, respectively. The stability of the lipase enzyme isolated from porcine pancreas (PPL) and Rhizopus niveus (RNL) toward hydrolysis in ternary DESs medium was investigated. The PPL showed higher activity compared to the RNL in DESs. Molecular docking simulation of the selected DES with the substrate (p-nitrophenyl palmitate) toward PPL was also reported. It is worth noting that ternary DES systems would be viable lipase activators in hydrolysis reactions.

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Publication Date
Thu Jan 01 2015
Journal Name
Iet Colloquium On Millimetre-wave And Terahertz Engineering & Technology 2015
Millimetre wave semiconductor based isolators and circulators
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Publication Date
Wed Dec 01 2021
Journal Name
Baghdad Science Journal
Boubaker Wavelets Functions: Properties and Applications
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This paper is concerned with introducing an explicit expression for orthogonal Boubaker polynomial functions with some important properties. Taking advantage of the interesting properties of Boubaker polynomials, the definition of Boubaker wavelets on interval [0,1) is achieved. These basic functions are orthonormal and have compact support. Wavelets have many advantages and applications in the theoretical and applied fields, and they are applied with the orthogonal polynomials to propose a new method for treating several problems in sciences, and engineering that is wavelet method, which is computationally more attractive in the various fields. A novel property of Boubaker wavelet function derivative in terms of Boubaker wavelet themsel

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Publication Date
Mon May 28 2018
Journal Name
Iraqi Journal Of Science
Properties of fuzzy absolute value on R and Properties Finite Dimensional Fuzzy Normed Space
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The first aim in this paper is to introduce the definition of fuzzy absolute value on the vector space of all real numbers  then basic properties of this space are investigated. The second aim is to prove some properties that finite dimensional fuzzy normed space have.

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Publication Date
Wed Sep 14 2016
Journal Name
Journal Of Baghdad College Of Dentistry
Effect of Mouth Rinses on Surface Roughness of Two Methacrylate-Based and Siloraine-Based Composite Resins
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Background: Various fluids in the oral environment can affect the surface roughness of resin composites. This in vitro study was conducted to determine the influence of the mouth rinses on surface roughness of two methacrylate-based resin (nanofilled and packable composite) and siloraine-based resin composites.

Materials and methods: Disc-shaped specimens (12 mm in diameter and 2mm in height) were prepared from three types of composi

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Publication Date
Thu Jun 30 2022
Journal Name
Iraqi Journal Of Market Research And Consumer Protection
STUDY OF BASIC CHEMICAL COMPONENTS AND ANTIMICROBIAL ACTIVITY OF LEMONGRASS LEAVES (Cymbopogon citratus): STUDY OF BASIC CHEMICAL COMPONENTS AND ANTIMICROBIAL ACTIVITY OF LEMONGRASS LEAVES (Cymbopogon citratus)
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The study aimed to evaluate the antimicrobial activity using different concentrations of aqueous and alcoholic extracts of dried lemongrass leaves. Chemical phytochemical tests were performed for aqueous and alcoholic extracts of lemongrass. Antimicrobials activity was tested using agar disc diffusion method against Escherichia coli and Staphylococcus aureus. The results of the study showed that the aqueous extract of dried lemon leaves was highly effective (P≤0.05) against S. aureus, as the inhibition diameter was 22 mm for 50 dilution, while the inhibition diameter decreased to 15 mm for concentration 100. As for the alcoholic extract only, the diameter of inhibition decreased significantly (P≤0.0

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Publication Date
Tue Jun 30 2020
Journal Name
Iraqi Journal Of Market Research And Consumer Protection
ANTIBACTERIAL ACTIVITY OF NATURAL (DATES AND APPLE CIDER) VINEGARS AGAINST FOODBORNE BACTERIAL PATHOGENS: ANTIBACTERIAL ACTIVITY OF NATURAL (DATES AND APPLE CIDER) VINEGARS AGAINST FOODBORNE BACTERIAL PATHOGENS
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Local food samples investigated for the presence of pathogenic bacteria. Hash meat sample was used to isolate Escherichia coli and chicken meat (poultry) was used to isolate Salmonella typhi. Biochemical tests and API20E system used in order to identify these isolates. Two natural vinegar samples (dates & apple cider) were used in order to study its antibacterial activity against the two tested bacteria. Disc diffusion method was used, the results showed that two vinegar samples have antibacterial activity against the two tested bacteria. Date vinegar showed inhibition zone 19mm against E. coli & 9mm against S. typhi, while Apple cider vinegar showed diameter of inhibi

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Publication Date
Thu Apr 25 2019
Journal Name
Iraqi Journal Of Market Research And Consumer Protection
SYNTHESIS, CHARACTERIZATION AND STUDY THE ANTIBACTERIAL ACTIVITY OF SOME DISUBSTUTITED-1,3,4-OXADIAZOLE DERIVATIVES: SYNTHESIS, CHARACTERIZATION AND STUDY THE ANTIBACTERIAL ACTIVITY OF SOME DISUBSTUTITED-1,3,4-OXADIAZOLE DERIVATIVES
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The purpose of this study is to determine the useful of Schiff bases derivatives containing (oxazepine, tetrazole) rings with biological activity which can be used as drug and antimicrobial, the present work is started from [Binary (2,5(4,'4-diaminophenyl) – 1,3,4 – oxadiazole]. A variety of Schiff bases and heterocyclic (oxazepine, tetrazole) have been synthesis, and confirm that structures by physical properties , FTIR , 1H-NMR, 13C-NMR, elemental analysis, [Microbial study against three type of bacteria (staphylococcus aurea and klebsiella pneumonia) and (Canadida albncans) fungi].All analyzation performed in center of consulatation University of Jordan.

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Publication Date
Fri Sep 30 2022
Journal Name
Iraqi Journal Of Science
A Deep Study on the Performance of the Spatial Density Distribution Method to Recognize Handwritten Signatures
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    A signature is a special identifier that confirms a person's identity and distinguishes him or her from others. The main goal of this paper is to present a deep study of the spatial density distribution method and the effect of a mass-based segmentation algorithm on its performance while it is being used to recognize handwritten signatures in an offline mode. The methodology of the algorithm is based on dividing the image of the signature into tiles that reflect the shape and geometry of the signature, and then extracting five spatial features from each of these tiles. Features include the mass of each tile, the relative mean, and the relative standard deviation for the vertical and horizontal projections of that tile. In the clas

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Scopus Crossref
Publication Date
Tue Nov 01 2022
Journal Name
Chemical Methodologies
Synthesis and Characterization of New Substituted Coumarin Derivatives and Study Their Biological Activity
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New substituted coumarins derivatives were synthesized by using nitration reaction to produce different nitro coumarin isomers which were separated from these isomers by using different solvent, and the reduction of nitro compounds was done to give corresponding amino coumarins. Temperature and reaction time of reaction were very important factors in determining the most productive nitro isotopes. A low temperature for three hours was sufficient to give a high product of a compound 6-nitro coumarin while increasing the temperature for a period of twenty-four hours that gave a high product of 8-nitro-coumarin. The synthesized compounds were confirmed by FT-IR,1 H-NMR, and13 C-NMR spectroscopy and all final compounds were tested for their ant

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Scopus
Publication Date
Mon Apr 10 2017
Journal Name
Ibn Al-haitham Journal For Pure And Applied Sciences
Endophytic Fungi from Leaves and Twigs of Albizia lebbeck and Their Antifungal Activity
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 The study was conducted to isolate and identify endophytic fungi from leaves and twigs of lebbeck (Albizia lebbeck) and study their antagonistic activity against some plant fungal pathogens. Results showed isolation of 75 isolate endophytic fungi from 240 segments of leaves and twigs representing colonization frequency of 47.43%. Isolated fungi included different species of Aspergillus which prevail over other species (6 species), and three different isolates of Penicillium, one more species of Paecilomyces, Drechslera, Fusarium, Curvularia, Nigrospora and hyaline sterile fungus. Results showed variation in colonization frequencies within all species isolated from the two plant parts.  Dual culture methods for

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