Browsing Chemistry & Earth Sciences by Title
Now showing items 23-42 of 560
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Alpha-glucosidase and carbonic anhydrase inhibition studies of Pd(II)-hydrazide complexes
( Elsevier , 2017 , Article)This study focused on the synthesis and characterization of hydrazide ligands and their respective Pd(II) complexes and used high throughput screening to determine their α-glucosidase and carbonic anhydrase II enzyme ... -
The amino acid composition of some Common marine algae from Qatar (Arabian Gulf)
( Qatar University , 1993 , Article)The most dominant twenty algal species representing the main three groups of benthic macroalgae, Chlorophyceae, Phaeophyceae and Rhodophyceae were collected from the coastal zones of the Qatar peninsula. The algae were ... -
Amphetamine Selective Electrodes Based on Dibenzo-18-crown-6 and Dibenzo-24-crown-8 Liquid Membranes
( American Chemical Society , 1989 , Article)Two novel membrane electrodes highly sensitive and selective for amphetaminium cation are developed and electrochemically evaluated according to IUPAC recommendations. These electrodes Incorporate amphetamine-dibenzo-18-crown-6 ... -
Amplitude modulation in infrared metamaterial absorbers based on electro-optically tunable conducting oxides
( Springer Verlag , 2018 , Article)A class of electro-optically tunable metamaterial absorbers is designed and theoretically investigated in the infrared regime towards realizing free-space amplitude modulators. The spacer between a subwavelength metallic ... -
An efficient eco advanced oxidation process for phenol mineralization using a 2D/3D nanocomposite photocatalyst and visible light irradiations
( Nature Publishing Group , 2017 , Article)Nanocomposites (CNTi) with different mass ratios of carbon nitride (C3N4) and TiO2 nanoparticles were prepared hydrothermally. Different characterization techniques were used including X-ray diffraction (XRD), UV-Vis diffuse ... -
An Innovative Platform Merging Elemental Analysis and Ftir Imaging for Breast Tissue Analysis
( Nature Publishing Group , 2019 , Article)Histopathology and immunohistology remain the gold standard for breast cancer diagnostic. Yet, these approaches do not usually provide a sufficiently detailed characterization of the pathology. The purpose of this work is ... -
An overview of bio-inspired intelligent imprinted polymers for virus determination
( MDPI , 2021 , Article Review)The molecular imprinting polymers (MIPs) have shown their potential in various applications including pharmaceuticals, chemical sensing and biosensing, medical diagnosis, and environmental related issues, owing to their ... -
Analysis of aerosol absorption properties and transport over North Africa and the Middle East using AERONET data
( Copernicus GmbH , 2016 , Article)In this paper particle categorization and absorption properties were discussed to understand transport mechanisms at different geographic locations and possible radiative impacts on climate. The long-term Aerosol Robotic ... -
Analytical methods for mercury speciation, detection, and measurement in water, oil, and gas
( Elsevier B.V. , 2020 , Article Review)Mercury related compounds are released in massive and alarming amounts due to increased human activities such as the processing of hydrocarbons in the petroleum industry. The contamination due to mercury compounds is ... -
Antimicrobial Modification of LDPE Using Non-thermal Plasma
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)Low-density polyethylene (LDPE) represents polymer having good chemical and physical characteristics for which it is widely used in many applications, such as biomedical and food packaging industry. This polymer excels by ... -
Antimicrobial modification of PLA scaffolds with ascorbic and fumaric acids via plasma treatment
( Elsevier B.V. , 2020 , Article)An optimal medical scaffold should be biocompatible and biodegradable and should have adequate mechanical properties and scaffold architecture porosity, a precise three-dimensional shape, and a reasonable manufacturing ... -
Application of a definitive screening design for the synthesis of a charge-transfer complex of sparfloxacin with tetracyanoethylene: Spectroscopic, thermodynamic, kinetics, and DFT computational studies
( Royal Society of Chemistry , 2019 , Article)Herein, a spectrochemical approach was adopted to study the charge-transfer (CT) complexation of sparfloxacin (SFX) with tetracyanoethylene (TCNE). In this study, a three-level design of experiments (DOE) involving a ... -
Application of fractional factorial design for green synthesis of cyano-modified silica nanoparticles: Chemometrics and multifarious response optimization
( Elsevier B.V. , 2018 , Article)Cyano-functionalized spherical silica nanoparticles (SNPs) were synthesized via St?ber method. A 2 k-p IV fractional factorial design (2k-p IV-FFD) was used to smartly prepare monodispersed evenly distributed SNPs. Six ... -
Application of FTIR and LA-ICPMS spectroscopies as a possible approach for biochemical analyses of different rat brain regions
( MDPI AG , 2018 , Article)Fourier Transform Infrared Spectroscopy (FTIR) is a non-destructive analytical technique that has been employed in this research to characterize the biochemical make-up of various rat brain regions. The sensorimotor cortex, ... -
Application of Pineapple Leaves as Adsorbents for Removal of Rose Bengal from Wastewater: Process Optimization Operating Face-Centered Central Composite Design (FCCCD)
( Multidisciplinary Digital Publishing Institute (MDPI) , 2020 , Article)Adsorptive removal of rose bengal (RB) from contaminated water samples was approached using pineapple leaves (PAL). Three adsorbents were utilized for that purpose; raw pineapple leaves (RPAL) and the thermally activated ... -
Application of Plackett-Burman Design for Spectrochemical Determination of the Last-Resort Antibiotic, Tigecycline, in Pure Form and in Pharmaceuticals: Investigation of Thermodynamics and Kinetics.
( MDPI , 2022 , Article)Tigecycline (TIGC) reacts with 7,7,8,8-tetracyanoquinodimethane (TCNQ) to form a bright green charge transfer complex (CTC). The spectrum of the CTC showed multiple charge transfer bands with a major peak at 843 nm. The ... -
Application of Pulsed Streaming Potentials in Plastic Microfluidic Channels for Quantitative Point-of-Care Determination of Cardiac Markers
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)Acute myocardial infarction (AMI) is a well-recognized angiocardiopathy that can be spotted by a rise and fall of "chemical biomarkers" in a clinical context. Biomarkers are then, valuable indicators, together with ischemic ... -
Application of Samarium- and Terbium-Sensitized Luminescence via a Multivariate-Based Approach for the Determination of Orbifloxacin
( Hindawi , 2022 , Article)A lanthanide-based optical sensor has been developed for the sensitive and reliable spectrofluorometric determination of the fluoroquinolone antibiotic orbifloxacin (ORLX). Reaction of ORLX and two lanthanide metal ions, ... -
Aqueous dispersions of carbon black and its hybrid with carbon nanofibers
( Royal Society of Chemistry , 2018 , Article)The aqueous dispersions of a special type of carbon black (CB) in 1 M lithium bis(trifluoromethanesulfonimide) electrolyte is mainly controlled by the affinity of the aqueous electrolyte towards the CB particles rather ... -
Atypical coupling method for the preparation of 1, 2-di (thiophen-2-yl) ethene-1, 2-diol compounds via a cu (ii) catalyst
( justia patents , 2022 , Other)Presented herein is a coupling method for the preparation of 1,2 -di ( thiophen - 2 -yl ) ethane -1,2 -diol compounds, including ( E )-1,2 -di(thiophen - 2 -yl )ethene - 1,2 -diol, via a Cu (II ) catalyst .