Chemistry & Earth Sciences: Recent submissions
Now showing items 41-60 of 586
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Keratin for potential biomedical applications
( Elsevier , 2022 , Book chapter)Keratin is a cysteine-rich fibrous protein. As a structural protein, keratin represents the major constituent in the appendageal structures conferring their structural features. Being copiously available in nature as a ... -
Recent advances in synthesis of functionalized β-lactams through cyclization of N-propargyl amine/amide derivatives
( Bentham Science Publishers B.V. , 2018 , Article Review)β-lactams have attracted a significant attention due to their potential biological activities and wide variety of synthetic applications. Developing novel and efficient methods for construction of functionalized β-lactams ... -
Currently Used Microbes and Advantages of Using Genetically Modified Microbes for Ethanol Production
( Elsevier , 2018 , Book chapter)Advancement in biotechnological methods has increased the potential for the commercial development of second-generation biofuels from lignocellulosic biomass. In this regard, the methods related to pretreatment of ... -
Whole-Genome Sequence Data Analysis of Anoxybacillus kamchatkensis NASTPD13 Isolated from Hot Spring of Myagdi, Nepal
( Hindawi Limited , 2021 , Article)Anoxybacillus kamchatkensis NASTPD13 isolated from Paudwar hot spring of Myagdi, Nepal, upon morphological and biochemical analysis revealed to be Gram-positive, straight or slightly curved, rod-shaped, spore-forming, ... -
Nanostructures Formed by Custom-Made Peptides Based on Amyloid Peptide Sequences and Their Inhibition by 2-Hydroxynaphthoquinone
( Frontiers Media S.A. , 2020 , Article)Extensive research on amyloid fibril formations shows that certain core sequences within Aβ peptide play an important role in their formation. It is impossible to track these events in vivo. Many proteins and peptides with ... -
Phytochemical Analysis of Anastatica hierochuntica and Aerva javanica Grown in Qatar: Their Biological Activities and Identification of Some Active Ingredients
( MDPI , 2023 , Article)Plant-derived compounds and their extracts are known to exhibit chemo preventive (antimicrobial, antioxidant and other) activities. The levels of such chemo preventive compounds vary depending on environmental factors, ... -
Reduction kinetics of ceria surface by hydrogen
( Elsevier , 2004 , Article)Sintered ceria pellets of porosity 16.4% and density 5.99gcm−3 were treated in a hydrogen flow at 1atm and various temperatures. The electrical conductivity was measured in situ while hydrogen gas was flowing over the CeO2. ... -
Dissolved copper, cadmium and lead in the coastal waters of Qatar, Arabian Gulf
( National Institute of Science Communication and Information Resources (NISCAIR) , 1997 , Article)The concentrations of Cu, Pb and Cd have been determined in the exclusive economic zone of Qatar, Arabian Gulf during December 1993. Cathodic stripping voltammetry (CSV) was used both before and after UV destruction of ... -
Ether, sulfide and sulfone derivatives of cinnamaldehyde: Insights into synthesis, structural elucidation and solvatochromism
( Elsevier , 2024 , Article)Symmetric ether, sulfide and sulfone derivatives based on Schiff base functionalized group (3a-c) were synthesized via classical condensation of 4,4′-diaminodiphenyl precursors (1a-c) and cinnamaldehyde (2) in methanol at ... -
Pinctada radiata (pearl oyster): A bioindicator for metal pollution monitoring in the Qatari waters (Arabian Gulf)
( Springer Nature , 1998 , Article)Bivalves are extensively used in monitoring programmes in the marine environment due to their ability to concentrate pollutants to several orders of magnitude above ambient levels in sea water. Commonly, the levels of ... -
Beach tar contamination on the Qatari coastline of the Gulf
( Elsevier , 1999 , Article)Beach tar concentrations were measured along the Qatari coastlines. Tar concentrations, collected from 11 locations, varied in space and time with values ranging between 2 and 1132 g m−1 (average 290 g m−1) of beach front. ... -
8-hydroxyquinoline grafted triazole derivatives as corrosion inhibitors for carbon steel in H2SO4 solution: Electrochemical and theoretical studies
( Springer Science and Business Media Deutschland GmbH , 2021 , Article)The inhibition capacity of carbon steel (CS) in 0.5M H2SO4 by three 8-hydroxyquinoline grafted triazole derivatives (EHTC, AHTC, and MHTC) have been investigated using electrochemical impedance spectroscopy (EIS), ... -
The Effect of the Moroccan Salvadora Persica Extract on the Corrosion Behavior of the Ni-Cr Non-precious Dental Alloy in Artificial Saliva
( Springer Science and Business Media Deutschland GmbH , 2021 , Article)To evaluate, for the first time, the effect of the Moroccan Miswak (Salvadora persica) extract on the corrosion behavior of Ni-Cr dental alloy in artificial saliva, the electrochemical techniques, such as Inductively Coupled ... -
Batch study for herbicide bentazon adsorption onto palm oil fronds activated carbon
(2012 , Article)The adsorption of herbicide bentazon from aqueous solution onto activated carbon derived from palm oil fronds (PFAC) was investigated through batch study. The effects of both; initial concentration of the bentazon (ranging ... -
The use of optical spectroscopy as abiomarker probe for fungi identification
( Research India Publications , 2013 , Article)Spectroscopic techniques includinginfrared,Raman (FT-Raman) and ultraviolet spectroscopy (UV-Vis)spectroscopy were used to identify and differentiate three fungi within the same Aspergillus genus (A. fumigatus, A. terreusand ... -
Infrared spectroscopy as an ultrastructure bio-probe for fungal cellular characterization
( Research India Publications , 2013 , Article)Fourier transform infrared spectroscopy was used to characterize the biochemical composition of fungal cells. It also was applied to detect the differences between the biochemical constituents of spores and hyphae of A. ... -
Adsorption of 2, 4-dichlorophenoxyacetic acid onto date seeds activated carbon: Equilibrium, kinetic and thermodynamic studies
(2012 , Article)Adsorption isotherm and kinetics of 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide on activated carbon prepared from Barhi date seeds were determined from batch tests. The effects of contact time, initial herbicide ... -
Spectroscopic studies on the charge-transfer complex [VO(acac) 2]I5 formed in the reaction of oxovanadium(IV) acetylacetonate with iodine
(2005 , Article)Spectroscopic Studies on the Charge-Transfer Complex [VO(acac)2]I5 Formed in the Reaction of Oxovanadium(IV)acetylacetonate with Iodine -
Response to: "Cancer risk due to contamination: Consideration from market basket survey in Qatar"
( Elsevier , 2014 , Article)We welcome the comments on our article entitled “A market basket survey of As, Zn and Se in rice imports in Qatar: Health implications” (Rowell et al., 2014). The commenter opens up the debate on what constitutes a safe ... -
Fourier transform infrared imaging-A novel approach to monitor bio molecular changes in subacute mild traumatic brain injury
( MDPI AG , 2021 , Article)Traumatic brain injury (TBI) can be defined as a disorder in the function of the brain after a bump, blow, or jolt to the head, or penetrating head injury. Mild traumatic brain injury (mTBI) can cause devastating effects, ...
