A5057476077- Advanced Cellulose Research Studies
- Lignin and Wood Chemistry
- Concrete and Cement Materials Research
- Recycling and utilization of industrial and municipal waste in materials production
- Adsorption and biosorption for pollutant removal
- biodegradable polymer synthesis and properties
- Magnesium Oxide Properties and Applications
- Calcium Carbonate Crystallization and Inhibition
- Crystallization and Solubility Studies
- Minerals Flotation and Separation Techniques
- Fermentation and Sensory Analysis
- Essential Oils and Antimicrobial Activity
- Thermochemical Biomass Conversion Processes
- Multicomponent Synthesis of Heterocycles
- Natural product bioactivities and synthesis
- Thermal and Kinetic Analysis
- Biopolymer Synthesis and Applications
- Polymer Science and PVC
- Bioactive Natural Diterpenoids Research
- Liquid Crystal Research Advancements
- Plant Gene Expression Analysis
- Microbial bioremediation and biosurfactants
- Surface Modification and Superhydrophobicity
- Catalytic Processes in Materials Science
- Phytochemicals and Antioxidant Activities
Mohammed V University
2012-2023
Laboratoire de Chimie Physique
2010-2011
Centre National de la Recherche Scientifique
1996-1997
Abstract This study intends to synthesis chitosan‐aromatic aldehyde Schiff bases (ChSB) investigate their thermal stability and kinetics degradation. All samples were characterized by FTIR, XRD SEM techniques. Chitosan chitosan derivatives subjected thermo‐gravimetric analysis, at four multiple heating rates 5, 10, 15 20 °C.min −1 . Calculations using two isoconversional integral methods, Flynn Wall Ozawa Kissinger performed. The changes in Entropy, Enthalpy, Gibbs free energy, lifetime have...
Cellulose was modified under mild conditions in order to increase its capability trap pollutants.Nicotinoyl chloride hydrochloride (NCHC), with pyridine ring able adsorb cations, grafted on the substrate.This grafting has been monitored by infrared spectroscopy and elemental analysis.We have studied adsorption of Methylene Blue (MB) onto unmodified cellulose.It observed that increases three times retention capacity cellulose kinetics is perfectly represented a pseudo second model.The well...
The present study deals with the homogeneous acylation of cellulose p -nitrobenzoyl chloride in a reaction medium composed mixture 1-butylpyridinium and dimethylsulfoxide (BPyCl/DMSO), presence different bases under mild conditions. preparation -nitrobenzoate depending on conditions, influences parameters such as base type, types (kraft microcrystalline) products were investigated. Cellulose degree substitution (DS) range from 0.12 to 1.5 was accessible, low excess reagent for short time....
The purpose of our study was to bring elements knowledge on the anticancer and antibacterial effects two plants, widely used in Moroccan traditional pharmacopeia. These plants are: Marrubium vulgare Euphorbia resinifera. aerial parts each plant were extracted successively with Hexane, Dichloromethane, finally methanol. MTT-based method applied evaluate cytotoxicity cancer cells: animal cells BSR Vero human cell RD. We evidenced an activity extract dichloromethane resinifera against studied...
"The present investigation includes the extraction of lignin from waste sawdust wood industry (Tetraclinis articulata) using sulfuric acid treatment, its characterization and further use for removal methylene blue (MB) cationic dye aqueous media. The extracted was characterized by FT-IR XRD, thermal properties were studied TGA DSC analyses, surface morphology observed SEM EDX. spectra showed homogeneity in chemical structure sample. In adsorption study, effects temperature, contact time,...
This paper uses a statistical approach to evaluate the degree of metal pollution, trace element concentrations, and seasonal evolutions various physicochemical parameters Moroccan drinking water sludge. Principal component analysis (PCA) was used analyze these (including temperature (Tw), volatile suspended solids (VSS), matter (SM)) in liquid raw sludge, conductivity (Cond(s) pH(s)) addition content supernatant (e.g., Cd(s), Pb(s), Cr(s)), pH heavy contents Pb, Cr, Cd, Fe, Al, Cu, Zn, P, N,...
Abstract Cellulose tosylates with different degree of substitution (DS) were prepared by reacting cellulose in DMAc/LiCl p ‐tosyl chloride at 8 °C the presence triethylamine. The effects number mole tosyl (A), base (triethylamine) (B) and reaction time (C) on DS studied Response Surface Methodology (RSM) known as Box‐Behnken Design (BBD). It was found that A is main factor influencing interaction between B C negligible. An optimal value 2.79 obtained A=6.96 B=2.99 mol eq. a C=24 h. synthetic...
Two eucalyptus hybrids (EGC 39, EGC 241), resulting from crosses between Eucalyptus grandis and camaldulensis, were investigated to see if they could produce kraft papermaking fibers with low lignin adequate physical properties. The two harvested at an age of 8 years along 6-8 year old camaldulensis (Rostrata). All three eucalypti grown in the area Gharb North-West Morocco. tracheids had a very high Runkel ratio (2 x cell wall thickness/lumen diameter) produced paper sheets tensile strength...
La composition chimique des boues hydroxydes, sous-produit de la potabilisation l'eau est constituée majoritairement d'hydroxydes d'aluminium et silice, les hydroxydes Fer, calcium, potassium magnésium dont le taux peut varier sensiblement selon périodes prélèvement eaux brutes conférer à boue propriétés physico-chimiques intéressantes. minéralogique également comporter un solidifiant tel que silicates calcium. L'observation au MEB ces montre une phase amorphe sous forme flocons géométrie...
Significant quantities of oceanic waste oyster shells and drinking water treatment plant sludge (alumina sludge) raise serious issues on eco-toxicology environmental protection. In order to manipulate these issues, the present research work investigates valorisation capability mentioned materials as raw meal substitutes for Portland clinker production. The clinkers their respective cements thus obtained have been structurally characterised by various structural analysis techniques including,...
In most native lignins, at least 50% of the phenylpropane (C(9)) units are involved in β-O-4 linkages. It was recently observed that ethylguaiacol (EG) efficient trapping coniferyl alcohol generated from cleavage uncondensed dimeric structures during soda-anthraquinone (AQ) or SAQ delignification sugar maple wood meal. Some transformed to vinylguaiacol and isoeugenol, α-carbon atom all three monomers formed C-C bonds with C-5 position EG. present research, eucalyptus cane bagasse meals were...