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Iso-propyl caprylate and iso-propyl linolenate synthetic fluids as novel alternatives in deep-water drilling operations:Critical fluid properties and aerobic biodegradability assessments

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Petroleum 2024年第2期10卷 254-264页

作者： adewale Johnson Folayan adewale Dosunmu Aleruchi Boniface Oriji Department of Petroleum and Gas Engineering University of Port HarcourtNigeria Professor of Petroleum and Gas Engineering University of Port HarcourtNigeria

Present drilling fluids for deep water wells have severe degenerative effect on the environment with high operational and disposal ***,making them less desirable in recent *** synthetic drilling fluid provides a novel environmentally friendly alternative but conventional ester-based drilling fluids exhibit high viscosities in deep-water wells causing excessive equivalent circulating density(ECD)and increased risk of lost circulation owing to narrow mud density *** study experimentally investigates the critical fluid properties and aerobic biodegradability potentials of two newly developed deep-water synthetic ester drilling fluids namely:iso-propyl caprylate(COIPE)and iso-propyl linolenate(LOIPE)synthetic fluids and their comparison with synthetic-paraffin(SP-SBF)and isomerized-olefin(IOSBF)synthetic hydrocarbon *** esters of iso-propyl caprylate and iso-propyl linolenate were produced from the isolation of ester mixtures that were obtained from the homogeneous catalytic transesterification of coconut and linseed plant oil biomass *** COIPE was isolated from the coconut oil iso-propyl ester mixture by low-pressure fractional distillation *** fractional distillation and crystallization were used to isolate the LOIPE ester from the linseed oil iso-propyl ester ***,the aerobic biodegradation investigation was conducted by a modified oxygen consumption respirometry *** GC-MS analysis of the COIPE and LOIPE showed that the former contains essentially of lower saturated carbon compounds(C8).Whereas the latter contains higher molecular weight and unsaturated carbon compounds(C18+).The COIPE and LOIPE kinematic viscosity values are in good agreement with that of the reference synthetic hydrocarbon fluid samples(SP-SBF and IO-SBF).Although,the COIPE synthetic ester has lower viscosity value owing to the presence of shorter chain and saturated carbon atoms(C8 esters).Similarly,the linolenic oil iso

关键词： Aerobic biodegradation Critical fluid properties Deep-water wells Esters'isolation:isomerized-olefin(IO-SBF) Iso-propyl caprylate(COIPE) Iso-propyl linolenate(LOIPE) Respirometry technique Synthetic-paraffin(SP-SBF)

Neuroinflammation as a therapeutic target in huntington's disease

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Neural Regeneration Research 2025年第3期20卷 817-818页

作者： Andrea Kwakowsky Thulani h.Palpagama Center for Brain Research and Department of Anatomy and Medical Imaging Faculty of Medical and Health SciencesUniversity of AucklandAucklandNew Zealand Pharmacology and Therapeutics School of MedicineGalway Neuroscience CentreUniversity of GalwayGalwayIreland

In 1872, George huntington presented his essay “On Chorea” to the Meigs and Mason Academy of Medicine and, in doing so, detailed a disease that would later bear his name. huntington's disease(hD) is a genetic, neurodegenerative disease that manifests as the loss of motor control,cognitive impairment,and mood and psychiatric changes in paents.

关键词： huntington inflammation Medicine

Glial response in the midcingulate cortex in huntington’s disease

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Neural Regeneration Research 2025年第1期20卷 207-208页

作者： Thulani h.Palpagama Andrea Kwakowsky Center for Brain Research and Department of Anatomy and Medical Imaging Faculty of Medical and Health SciencesUniversity of AucklandAucklandNew Zealand Pharmacology and Therapeutics School of MedicineGalway Neuroscience CenterUniversity of GalwayGalwayIreland

huntington’s disease(hD)is a genetic disease characterized by the progressive degeneration of the striatum and *** can present with a variety of symptoms that can broadly be classified into motor symptoms,inclusive of choreatic movements and rigidity,mood and psychiatric symptoms,such as depression and apathy,and cognitive symptoms,such as cognitive *** causal mutation underlying hD results from an expansion of a CAG repeat sequence on the IT15 gene,resulting in the formation and accumulation of a mutant huntingtin protein.

关键词： huntington degeneration cortex

Physico-mechanical Properties of Composite Briquettes from Corncob and Rice husk

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Journal of Bioresources and Bioproducts 2019年第3期4卷 25-31页

作者： h A ajimotokan S E IBITOYE J K ODUSOTE O A ADESOYE P O OMONIYI Department of Mechanical Engineering University of IlorinIlorinNigeria Department of Materials and Metallurgical Engineering University of IlorinIlorinNigeria

Densification of agricultural residues into briquettes as the alternative renewable feedstock can improve their physico-mechanical and storage properties as solid *** paper presents the physico-mechanical properties of the composite briquettes made from corncob and rice *** samples of corncob and rice husk were collected,sorted and pulverised into fines of 0.25,1.00 and 1.75 mm particle *** fines were blended at mixing ratios of 80꞉20,70꞉30,60꞉40,and 50꞉50,bonded with 5%starch on weight percentage basis and compressed at compaction pressures of 25,50,and 65 kPa to produce the briquette *** briquette made from 80:20 ratio of corncob to rice husk,0.25 mm particle size and 65 kPa pressure exhibited the highest compressive strength of 111 kN/m2 and the least of 39 kN/m^(2) from briquette with 50꞉50 ratio of corncob to rice husk,1.75 mm particle size and 25 kPa *** briquette made from 50꞉50 ratio of corncob to rice husk,0.25 mm particle size and 65 kPa pressure had the highest water resistance capacity,and the least from briquette of 80꞉20 ratio of corncob to rice husk,1.75 mm particle size and 25 kPa *** resulting physico-mechanical qualities of the produced corncob and rice husk briquettes suggested that they could be used as the solid fuels for domestic and industrial applications.

关键词： composite briquette compressive strength relaxation ratio durability corncob rice husk

Comparative chemical sensor for detection of chromium(Ⅵ) in aqueous solution

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Optoelectronics Letters 2025年第1期21卷 21-27页

作者： Sura h.AL-REKABI A.A.ALWAhIB Electrical Technique Department Al Suwayrah Technical Institute Middle Technical University Laser and Optoelectronics Department University of Technology-Iraq

A process for purifying aqueous solutions containing heavy and toxic metals such as chromium（Cr） has been investigated. One of the extremely harmful pollutants in rivers and seawater is the heavy metal ions due to their direct impacts on human, animals and plants are hexavalent Cr（Ⅵ）. Consequently, highly sensitive sensor to detect Cr is essential. Surface plasmon resonance（SPR） technique has attracted huge research interest in detecting heavy metals specifically. In this study, three types of prism-based SPR sensor, gold（Au）/silver（Ag）, Au/polyaniline（PANI） and Au/titanium dioxide（TiO2） nanostructured films, are investigated as potential sensing material to detect the presence of Cr（Ⅵ） ions in water. The base Au layer with thickness of 48.3 nm is deposited on a glass slide for all sensors. For Au/Ag, Au/PANI nanofibers and Au/TiO2sensor films, the Cr（Ⅵ） concentration is varied from 1 ppm to 15 ppm with sensitivity of 0.270 °ppm-1, 0.082 °ppm-1and 0.039 °ppm-1, respectively. Based on these results, the Au/PANI nanofibers are the most sensitive to Cr（Ⅵ） among the tested sensing materials.

关键词： Titanium dioxide

Processing Compressed Expanded Natural Graphite for Phase Change Material Composites

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Journal of Thermal Science 2023年第3期32卷 1213-1226页

作者： Alexander BULK adewale ODUKOMAIYA Ethan SIMMONS Jason WOODS National Renewable Energy Laboratory 15013 Denver West ParkwayGoldenCO 80401USA

Phase change materials(PCMs)are used in various thermal energy storage applications but are limited by their low thermal *** method to increase conductivity involves impregnating organic PCMs into highly porous conductive matrix *** these materials,compressed expanded natural graphite(CENG)matrices have received the most *** this attention,the effect that CENG processing has on PCM saturation and overall matrix thermal conductivity has not been fully ***,the effect of the heat treatment process used to expand intercalated graphite flakes is evaluated *** heat treatment temperatures yielded higher saturation rates and overall saturation at similar matrix *** example,increasing temperature from 300℃to 700℃resulted in approximately 60%-70%increase in pore saturation after 100 minutes of *** exposure time to heat treatment had less of an effect on PCM *** exposure time had negligible effect above 30 min and above 500℃heating ***,because the expanded graphite was found to oxidize around 700℃,the use of longer exposure time in manufacturing applications can be beneficial if a shortened impregnation time is *** treatment conditions did not impact thermal *** composite latent heat of fusion was also reduced approximately proportionally to the PCM mass fraction.A local maximum in axial thermal conductivity was observed at around 83%porosity,which is similar to previous *** observed conductivity at this maximum was a factor of 81 times greater than the conductivity of the PCM.

关键词： phase change materials thermal energy storage compressed expanded natural graphite thermal conductivity enhancement porous material sorptivity composite matrix

Recent improvements in oily wastewater treatment:Progress, challenges, and future opportunities

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Journal of Environmental Sciences 2015年第11期27卷 15-30页

作者： Sanaa Jamaly adewale Giwa Shadi Wajih hasan Institute Center for Water and Environment Department of Chemical and Environmental Engineering Masdar Institute of Science and Technology

Oily wastewater poses significant threats to the soil, water, air and human beings because of the hazardous nature of its oil contents. The objective of this review paper is to highlight the current and recently developed methods for oily wastewater treatment through which contaminants such as oil, fats, grease, and inorganics can be removed for safe *** include electrochemical treatment, membrane filtration, biological treatment,hybrid technologies, use of biosurfactants, treatment via vacuum ultraviolet radiation,and destabilization of emulsions through the use of zeolites and other natural *** review encompasses innovative and novel approaches to oily wastewater treatment and provides scientific background for future work that will be aimed at reducing the adverse impact of the discharge of oily wastewater into the environment. The current challenges affecting the optimal performance of oily wastewater treatment methods and opportunities for future research development in this field are also discussed.

关键词： Oily wastewater Electrochemical Biological Membrane Treatment

Does mesenchymal stem cell’s secretome affect spinal sensory circuits?Implication for pain therapies

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Neural Regeneration Research 2025年第1期20卷 181-183页

作者： Francesco Ferrini Esri h.Juárez Adalberto Merighi Department of Veterinary Sciences University of TurinGrugliascoTOItaly Department of Psychiatry and Neuroscience UniversitéLavalQuébec CityQCCanada

Mesenchymal stem cells(MSCs)are multipotent adult stem cells of mesodermal origin that can be isolated from various tissues,including bone marrow,tooth pulp,adipose tissue,and umbilical *** have gained significant attention in regenerative medicine due to their ability to modulate the immune system and favor tissue *** enrich the medium in which they are cultivated with a broad range of bioactive molecules,including growth factors,cytokines,chemokines,enzymes,nucleic acids,and extracellular vesicles that collectively compose the MSC *** increasing number of pre-clinical studies suggest that delivering in vivo an MSC-conditioned medium(i.e.,the medium collected from MSC cultures after at least 3 days of exposure)exerts neuroprotective and anti-inflammatory effects in a variety of neurological conditions.

关键词： protective clinical collective

Rheological study of nanoparticle-based cationic surfactant solutions

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Petroleum 2022年第4期8卷 522-528页

作者： Ayomikun Bello Joy Ozoani adewale Adebayo Dmitriy Kuriashov Skolkovo Institute of Science and Technology MoscowRussia Moscow Engineering Physics Institute MoscowRussia higher School of Economics MoscowRussia Kazan National Research Technological University KazanRussia

Worm-like micelles are of special interest among the many forms of surfactant aggregates because of their usefulness in research and *** are elongated,flexible aggregates formed by amphiphilic molecules spontaneously self-organizing in *** nature of the surfactant determines its unique shape,which may be altered by mixing it with other substances or changing physicochemical variables like as temperature,ph,or *** rheology of viscoelastic fluid systems is currently being modified using *** method,which was just introduced about 10 years ago,has shown to be highly promising,producing significant improvements in rheological properties,particularly at reservoir *** goal of this research is to investigate and assess the rheology of an aqueous cationic surfactant solution based on graphene oxide *** thermodynamics,structure and rheology of nanoparticle-based cationic surfactant solutions were investigated *** to structural and thermodynamic investigations in surfactant-nanoparticle mixtures,micellenanoparticle interactions arise as physical crosslinks between *** existence of these interactions is shown to generate considerable viscosity and viscoelasticity in wormlike micelles,even when the fluid is Newtonian in the absence of *** viscosity,shear modulus and relaxation time all increase as particle concentration *** nanoparticles generates a network of micellar entanglements as a result of *** results demonstrate that adding nanoparticles to surfactant solutions provides for a one-of-a-kind method of altering fluid rheology under a range of circumstances.

关键词： Surfactant Wormlike micelles Nanoparticles Viscosity Modulus Rheology