ORCID Profile
0000-0002-1360-540X
Current Organisations
Tunis El Manar University
,
Taif University
,
University of Limerick
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Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CC10076C
Abstract: An unprecedented heterobicluster-metal coordination polymer has been synthesized by a supramolecular template approach and shown to exhibit enhanced NLO properties.
Publisher: The Royal Society
Date: 13-01-2017
Abstract: Sequestration of CO 2 , either from gas mixtures or directly from air (direct air capture), is a technological goal important to large-scale industrial processes such as gas purification and the mitigation of carbon emissions. Previously, we investigated five porous materials, three porous metal–organic materials (MOMs), a benchmark inorganic material, Zeolite 13X and a chemisorbent, TEPA-SBA-15 , for their ability to adsorb CO 2 directly from air and from simulated flue-gas. In this contribution, a further 10 physisorbent materials that exhibit strong interactions with CO 2 have been evaluated by temperature-programmed desorption for their potential utility in carbon capture applications: four hybrid ultramicroporous materials, SIFSIX-3-Cu , DICRO-3-Ni-i , SIFSIX-2-Cu-i and MOOFOUR-1-Ni five microporous MOMs, DMOF-1 , ZIF-8 , MIL-101 , UiO-66 and UiO-66-NH 2 an ultramicroporous MOM, Ni-4-PyC . The performance of these MOMs was found to be negatively impacted by moisture. Overall, we demonstrate that the incorporation of strong electrostatics from inorganic moieties combined with ultramicropores offers improved CO 2 capture performance from even moist gas mixtures but not enough to compete with chemisorbents. This article is part of the themed issue ‘Coordination polymers and metal–organic frameworks: materials by design’.
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1TB02176A
Abstract: The synthesis and characterization of the biocompatible MOF NUIG4 is reported NUIG4 possesses an unprecedently high doxorubicin (DOX) encapsulation capacity (1955 mg DOX/g NUIG4) with a pH-controlled release mechanism.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8CC09152H
Abstract: We report herein that the mode of entanglement in square lattice, sql , coordination networks formed by an extended bis-imidazole ligand, L , can be controlled by the solvent used during solvothermal synthesis.
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7CC02289A
Abstract: Fine-tuning of HUMs through pillar substitution can significantly enhance trace CO 2 sorption performance and stability.
Publisher: American Chemical Society (ACS)
Date: 26-06-2012
DOI: 10.1021/CG300704B
Publisher: American Chemical Society (ACS)
Date: 11-12-2017
Abstract: Representative compounds from three classes of microporous solids, namely, metal-organic frameworks (MOFs), hybrid ultra-microporous materials (HUMs), and porous-organic polymers (POPs), were investigated for their nitric oxide gas uptake and release behavior. Low-pressure sorption studies indicated strong chemisorption of NO on the free amine groups decorating the MOF UiO-66-NH
Publisher: MDPI AG
Date: 21-02-2022
DOI: 10.3390/HORTICULTURAE8020177
Abstract: Drought affects plant growth and yield in many agricultural areas worldwide by producing negative water potentials in the root zone that reduce water availability, affecting plant development and metabolism. This study investigated the effect of varying moisture regimes (100% field capacity (FC), well-watered plants, 50% FC (moderate water stress), and 25% FC (severe water stress)) on growth parameters, chlorophyll content, and bioactive molecule patterns, and the impact on antioxidant, lipoxygenase (LOX), and acetylcholinesterase (AChE) activities in Rosa damascena. The water deficit treatments reduced biomass production for both treatments (−29 and −33%, respectively, for MWS and SWS) and total chlorophyll (−18 and −38% respectively for MWS and SWS), relative to the control. The 50% FC treatment had the greatest effect on the phenolic profiles and their respective functionalities, with significant increases in the levels of total phenolic, benzoic (gallic, p-coumaric, and syringic acids) (+32%), and cinnamic (caffeic and trans-cinnamic acid) acids (+19%) and flavonoids (epicatechin-3-O-gallate) (+15%) compared to well-watered leaves (control leaves). The 50% FC treatment also exhibited the highest potential antioxidant activities (apart from NO-quenching activity), evidenced by the lowest IC50 and EC50 values. The inhibitory LOX and AChE capacities varied depending on the severity of stress, with superior activity in the 50% FC treatment. Overall, the drought tolerance in rose was associated mainly with its suitable manipulation of antioxidant production and orderly regulation of LOX and AChE activities.
Publisher: Wiley
Date: 24-04-2020
DOI: 10.1002/AGJ2.20196
Abstract: With the depletion in arable land due to climate change, the use of naturally salt‐tolerant species to provide forage resources in arid and saline environments has become an emerging strategy. This study surveyed and determined the nutritive value of selected Tunisian vegetative species for use in Mediterranean saline environments. Eighteen wild species were analyzed for their nutrient contents and antinutritional factors. Chenopodiaceae accumulated more NaCl than Poaceae. Arthrocnemum indicum had the highest crude protein (CP) content, and Stipa roterta had the lowest. Poaceae had the highest fiber constituents (neutral and acid) and the lowest oxalate contents. Daily net gas production (GP) in the Chenopodiaceae and Poaceae ranged from 9.5 to 14.5 and from 13.8 to 37.9 ml per 0.2 mg dry matter (DM), respectively. Total phenol content and organic matter digestibility were species dependent. The metabolizable energy (ME) in the tested species ranged from 4.6 to 9.4 MJ kg −1 DM, with Catapodium rigidum and Arthrocnemum indicum having the lowest and highest ME values, respectively. In crux, Chenopodiaceae had the highest NaCl, CP, ME, and oxalate contents but had the lowest fiber and net GP. Sodium chloride content was positively correlated with CP and oxalate and negatively correlated with net GP. In arid and saline environments, where high salinity prevails and fodder resources are scarce, salt‐tolerant plants such as Suaeda fruticosa , Arthrocnemum indicum , and Halocnemum strobilaceum could be included in ruminant feeding calendars.
Publisher: American Chemical Society (ACS)
Date: 10-05-2017
Publisher: Springer Science and Business Media LLC
Date: 26-06-2021
Publisher: American Chemical Society (ACS)
Date: 10-2009
DOI: 10.1021/NP900382X
Abstract: Five new steroids, norselic acids A-E (1-5), were isolated from the sponge Crella sp. collected in Antarctica. The planar structures of the norselic acids were established by extensive NMR spectroscopy and mass spectrometry studies, and the configuration of norselic acid A (1) was elucidated by X-ray crystallography. Norselic acid A displays antibiotic activity against methicillin-resistant Staphylococcus aureus (MRSA), methicillin-sensitive S. aureus (MSSA), vancomycin-resistant Enterococcus faecium (VRE), and Candida albicans and reduces consumption of food pellets by sympatric mesograzers. Compounds 1-5 are also active against the Leishmania parasite at low micromolar levels.
Publisher: MDPI AG
Date: 18-11-2021
DOI: 10.3390/SU132212742
Abstract: Depending on the geochemical forms, heavy metal (HM) accumulation is one of the most serious environmental problems in the world and poses negative impacts on soil, plants, animals, and humans. Although the use of biochar to remediate contaminated soils is well known, the huge quantities of waste used and its recycling technique to sustain soil in addition to its use conditions are determinant factors for its characteristics and uses. A pot experiment was conducted in a completely randomized block design to evaluate metal forms and their availability under the application of garden waste biochar (GB) pyrolyzed at different temperatures, and a sequential extraction procedure was designed to fractionate Pb, Cd, Zn, and Cu of the contaminated soil. The results show that the TCLP-extractable Pb, Cd, Zn, and Cu were significantly decreased depending on the biochar addition rate, pyrolysis temperature, and tested metal. The acid extractable fraction was significantly decreased by 51.54, 26.42, 16.01, and 74.13% for Pb, Cd, Zn, and Cu, respectively, at the highest application level of GB400 compared to untreated pots. On the other hand, the organic matter bound fraction increased by 76.10, 54.69, 23.72, and 43.87% for the corresponding metals. The Fe/Mn oxide bound fraction was the predominant portion of lead (57.25–62.84%), whereas the acid fraction was major in the case of Cd (58.06–77.05%). The availability of these metals varied according to the application rate, pyrolysis temperature, and examined metals. Therefore, the GB is a nominee as a promising practice to reduce HM risks, especially pyrolyzed at 400 °C by converting the available fraction into unavailable ones.
Publisher: Wiley
Date: 15-12-2016
DOI: 10.1111/PLB.12419
Abstract: The chenopod Beta macrocarpa Guss (wild Swiss chard) is known for its salt tolerance, but the mechanisms involved are still debated. In order to elucidate the processes involved, we grew wild Swiss chard exposed to three salinity levels (0, 100 and 200 mm NaCl) for 45 days, and determined several physiological parameters at the end of this time. All plants survived despite reductions in growth, photosynthesis and stomatal conductance in plants exposed to salinity (100 and 200 mm NaCl). As expected, the negative effects of salinity were more pronounced at 200 mm than at 100 mm NaCl: (i) leaf apoplastic water content was maintained or increased despite a significant reduction in leaf water potential, revealing the halophytic character of B. macrocarpa (ii) osmotic adjustment occurred, which presumably enhanced the driving force for water extraction from soil, and avoided toxic build up of Na(+) and Cl(-) in the mesophyll apoplast of leaves. Osmotic adjustment mainly occurred through accumulation of inorganic ions and to a lesser extent soluble sugars proline was not implicated in osmotic adjustment. Overall, two important mechanisms of salt tolerance in B. macrocarpa were identified: osmotic and apoplastic water adjustment.
Publisher: Elsevier BV
Date: 06-2019
DOI: 10.1016/J.PLAPHY.2019.03.005
Abstract: To enhance crop productivity and minimize the harmful effects of various environmental stresses, such as salinity and drought, farmers often use mineral fertilizers. However, inadequate or excessive fertilization can reduce plant growth and nutritive quality and contribute to soil degradation and environmental pollution. This study investigated the effects of salinity (0, 100 or 150 mM NaCl) and nitrogen form (sole NO
Publisher: American Chemical Society (ACS)
Date: 13-01-2021
DOI: 10.1021/JACS.0C11247
Publisher: Elsevier BV
Date: 06-2017
DOI: 10.1016/J.JPLPH.2017.03.003
Abstract: The C
Publisher: MDPI AG
Date: 18-09-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CE00149A
Abstract: Short and sterically encumbered pyrazole ligands have led to the first ex les of non-interpenetrated, dichromate pillared hybrid ultramicroporous materials.
Publisher: American Chemical Society (ACS)
Date: 19-04-2012
DOI: 10.1021/CG3002948
Publisher: American Chemical Society (ACS)
Date: 30-07-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9CC00626E
Abstract: Industrial specifications require CO 2 concentrations in natural gas below 50 ppm during liquefaction because of corrosion and CO 2 freezing.
Publisher: Wiley
Date: 17-03-2016
Publisher: Elsevier BV
Date: 05-2020
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for michael zaworotko.