Chemical Papers最新文献

{"title":"Mineral profile determination by ICP-MS and physicochemical evaluation of cultivated and wild Algerian Opuntia species","authors":"Fares Boudjouan,&nbsp;Walid Zeghbib,&nbsp;Graciliana Lopes,&nbsp;Edgar Pinto,&nbsp;Agostinho Almeida,&nbsp;Vítor Vasconcelos","doi":"10.1007/s11696-024-03722-w","DOIUrl":"10.1007/s11696-024-03722-w","url":null,"abstract":"<div><p><i>Opuntia</i> is a well-known plant for its folkloric use and nutritional composition. This work aimed to evaluate the physicochemical characteristics, as well as the mineral composition realized by inductively coupled plasma-mass spectrometry (ICP-MS) for cultivated and wild Algerian <i>Opuntia</i> species. The results showed a significant difference in length, diameter, and weight between both <i>Opuntia</i> fruits. The highest pH, brix°, and total sugar content were found in the pulp of cultivated fruit compared to the wild one. Moisture was found to be higher in pulp of both species with more than 90% compared to their seeds (33%); however, ashes content was more determined in seeds with 1.04%. Moreover, high protein content was found in wild <i>Opuntia</i> parts (more than 200 mg bovine serum albumin equivalent/100 g dry matter), which also presented higher ascorbic acid and betalain contents, particularly in the pulp with 211.45 mg EAA/100 g DM and 312.91 mg/100 g DM, respectively, compared to the cultivated <i>Opuntia</i>. Finally, the mineral profile revealed a significant countenance of all species’ fractions in many important minerals for human organism functioning, like iron, magnesium, zinc, and potassium.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 17","pages":"9005 - 9018"},"PeriodicalIF":2.2,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antimicrobial and anti-biofilm activities of photosynthesized Ag@TiO2 and Ag@N-TiO2 nanocomposites against clinically isolated multidrug resistance Klebsiella pneumoniae","authors":"Alif Firman Firdausy,&nbsp;Liszulfah Roza,&nbsp;Mohammad Mansoob Khan,&nbsp;Abdul Wafi","doi":"10.1007/s11696-024-03737-3","DOIUrl":"10.1007/s11696-024-03737-3","url":null,"abstract":"<div><p>The rise of drug-resistant bacterial strains is escalating due to the ability to produce biofilms shielding bacteria from antimicrobial agents. Consequently, novel approaches are imperative for managing biofilm-related infections in healthcare settings. Silver-based nanoparticles have revealed potential antimicrobial characteristics against various bacteria. In the present work, silver-modified TiO₂ (Ag@TiO₂) and silver-modified/N-doped TiO₂ (Ag@N-TiO₂) nanocomposites were synthesized using the sol–gel and photochemical deposition under UV light illumination. FTIR, XRD, and DRS were performed to characterize the vibrational, structural, and optical properties of the synthesized materials, respectively. In addition, FE-SEM and EDX analysis were also utilized to determine the surface morphology, particle size, and elemental composition of the prepared materials. Furthermore, the synthesized Ag@TiO₂ and Ag@N-TiO₂ nanocomposites were explored and compared for antimicrobial and anti-biofilm agents against clinically isolated multidrug-resistant (MDR) <i>Klebsiella pneumoniae</i> (<i>K. pneumoniae</i>) on the silicone rubber as a urinary catheter material in the medical devices. The results showed that both Ag@TiO₂ and Ag@N-TiO₂ composites exhibited antimicrobial activities compared to negative control. The Ag⁻³@TiO₂ composite possessed a highest inhibition zone (77.29%) against MDR <i>K. pneumoniae.</i> In addition, anti-biofilm assay through the crystal violet method showed that Ag⁻¹@TiO₂ revealed an optimum inhibition (54.20%) compared to other samples. In conclusion, Ag@TiO₂ and Ag@N-TiO₂ nanocomposites have exhibited promising antimicrobial and anti-biofilm agents in medical devices, providing an effective inhibition toward the bacterial growth and biofilm formation of MDR <i>K. pneumoniae.</i></p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 17","pages":"9191 - 9203"},"PeriodicalIF":2.2,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of hydrotalcites in tannate conversion coatings for iron artefacts","authors":"Roman Košťúr,&nbsp;Viera Dujnič,&nbsp;Katarína Tomanová,&nbsp;Andrea Červenková,&nbsp;Matilda Zemanová","doi":"10.1007/s11696-024-03746-2","DOIUrl":"10.1007/s11696-024-03746-2","url":null,"abstract":"<div><p>The surface treatment of iron artefacts requires an application of the proper conservation coating to prevent further corrosion deterioration. Tannate coating is preferred as a conservation agent of iron/steel with the desired black appearance of the surface. In this work, the modification of the tannate coating with hydrotalcites to improve conservation ability was studied. Methodology of the surface treatment was developed, and process parameters: hydrotalcite addition, applied layers, immersion time and pH of the stock solution were studied. The treated surface was characterised by various methods e.g. Raman spectroscopy, EDX measurements and electrochemical characterisation, and the quality of the surface treatment was evaluated with respect to cyclic QUV test. Effect of hydrotalcite addition on quality of the conversion coating was confirmed and explained by incorporation of Al in the coating. Mechanism of the modified conversion coating was proposed.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 18","pages":"9341 - 9357"},"PeriodicalIF":2.2,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11696-024-03746-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Schiff base polymer doped with MWCNTs as electrode material for supercapacitors","authors":"Mengyuan He,&nbsp;Min Yu,&nbsp;Jieying Li,&nbsp;Mengjie Zhang,&nbsp;Lili Xue,&nbsp;Wei Wang","doi":"10.1007/s11696-024-03735-5","DOIUrl":"10.1007/s11696-024-03735-5","url":null,"abstract":"<div><p>By using a one-step synthesis approach, 2,4,6-triamino-5-nitrosopyrimidine and 4,4’-biphenyldicarboxaldehyde were combined to create Schiff base polymer (TPB) and carbon nanotubes doping Schiff base polymers (TPB/MWCNTs-X, X = 2, 5, 8). Enhancement of electrochemical properties of Schiff base polymers (TPB) can be done by doping pretreated carbon nanotubes. Carbon nanotubes disrupted the π−π stacking of polymer molecular links and some microcosmic pore structures formed in the nanotubes doping process, and the carbon nanotubes are suitable for channeling of electrolyte ion diffusion from electrolyte solution body to the center of conductive polymer bulk. Scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy were used to characterize the morphology and phase compositions. Sample TPB/MWCNTs-2 possess the optimal electrochemical performance, measurement results reveal that the specific capacitance of TPB/MWCNTs-2 electrode is 714 F g⁻¹ at a current density of 0.5 A g⁻¹ in the three-electrode system, and the capacity retention rate is still 76.6% in 5000 cycles with 10 A g⁻¹ current density. Furthermore, the asymmetric supercapacitor battery hybrid device (TPB/MWCNTs-2//AC) was established in 6 M KOH electrolyte with TPB/MWCNTs-2 and activated carbon (AC) serving as the positive and negative electrodes, respectively. The TPB/MWCNTs-2//AC device has the maximum energy density of 94.06 Wh kg⁻¹ with 0.5 A g⁻¹ current density; at the same time, the device possesses 371.87 W kg⁻¹ power density. The introduction of carbon nanotubes into Schiff base polymers disrupts the internal π−π stacking and provides more oxidatively active sites, offering more paths for electrons to move. This work offers a novel approach to the synthesis of electrode materials from Schiff base conducting polymer-carbon nanotube composites with exceptional electrochemical characteristics.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 17","pages":"9163 - 9175"},"PeriodicalIF":2.2,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of green ultrasound-assisted extraction of phenolic compounds from Crataegus laciniata leaves and assessing for antioxidant activity, enzyme inhibition, and UPLC-ESI-MS-MS guided identification of metabolites","authors":"Naima Saidene,&nbsp;Nassima Chaher-Bazizi,&nbsp;Radia Kadi,&nbsp;Dina Atmani-Kilani,&nbsp;Djebbar Atmani,&nbsp;Sidali Zaidi,&nbsp;Taous Kaddour,&nbsp;Meriem Rahmani-Berboucha,&nbsp;Nadjet Debbache-Benaida,&nbsp;Said Bouadam,&nbsp;Baya Farhi-Bouadam,&nbsp;Mostapha Bachir-bey","doi":"10.1007/s11696-024-03745-3","DOIUrl":"10.1007/s11696-024-03745-3","url":null,"abstract":"<div><p>The wide therapeutic potential attributed to <i>Crataegus laciniata</i> leaves has spurred considerable interest, yet comprehensive studies on the extraction of bioactive compounds, phytochemical composition, and biological properties are scarce. The present study aimed at optimizing ultrasound-assisted extraction of phenolic compounds from <i>C. laciniata</i> leaves (CLL), and assessing their composition, antioxidant potential, and enzyme inhibition. Box-Behnken design was used to estimate the effects of ethanol concentration, time, and temperature on the extraction procedure. Phytochemical composition was analyzed using UPLC-ESI-MS-MS, operating in the multiple reaction monitoring (MRM) mode. Biological properties were tested through antioxidant activity and inhibition potential of three key enzymes implicated in different pathologies. The mathematical model for total phenolic content (TPC) recovery indicated high significance and experimental adequacy with optimal extraction conditions of 51.18%, 54.82 °C, and 35.80 min for ethanol concentration, temperature, and time, respectively. Under these conditions the TPC was 308.25 mg GAE/g. UPLC-ESI-MS-MS analysis led to the identification of 15 phenolic compounds, including 9 flavonoids (quercetin, myricetin, rutin, hesperetin, naringenin, chrysin, vitexin, catechin, and esculin) and 6 phenolic acids (chlorogenic, gallic, ferulic, cinnamic, coumaric and 2-methoxybenzoic acids). The CLL extract exhibited strong antioxidant activity revealed by DPPH, ABTS, OH free radical scavenging activities and the FRAP assay. In addition, the optimal extract showed a fairly good inhibitory potential against urease, α-glycosidase, and acetylcholinesterase, with IC₅₀ values of 133.28, 7.21, and 153.94 μg/mL, respectively. The optimal extract of <i>C. laciniata</i> leaves can be considered a rich and diversified source of phenolic compounds with potent biological activities with great potential for exploration in the pharmacological and food industries.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 18","pages":"9325 - 9339"},"PeriodicalIF":2.2,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of Ni-foam-assisted graphene@MnO2-doped carbon fabric electrodes from waste cotton fabrics for supercapacitors","authors":"Safa Polat,&nbsp;Tuğçe Rumeysa Karakaş","doi":"10.1007/s11696-024-03733-7","DOIUrl":"10.1007/s11696-024-03733-7","url":null,"abstract":"<div><p>This study aims to enhance the energy storage capabilities of flexible supercapacitors by fabricating graphene-doped MnO₂-coated carbon cloth electrodes through a hydrothermal method. This technique was selected for its ability to uniformly disperse MnO₂ nanorods (~ 50 nm thick) on carbon surfaces, while anchoring graphene plates at rod interfaces to improve conductivity. Comprehensive characterization including XRD, FTIR, SEM, and TEM confirmed the structural integrity of the electrodes. Electrochemical analysis (CV, GCD, and EIS) revealed a diffusion-controlled charge storage mechanism, achieving a specific capacitance of 513 F/g (205 F/cm³–1027 mF/cm²) at a current density of 1 A/g. The electrodes demonstrated impressive energy-power densities of 45.6 Wh/kg–200 W/kg and retained 87% of their initial capacity after 2500 cycles, indicating robust cyclic stability. Remarkably, the inclusion of graphene enhanced the performance nearly threefold compared to similar electrodes in the literature, making these materials highly promising candidates for next-generation supercapacitors.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 17","pages":"9133 - 9145"},"PeriodicalIF":2.2,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Skimmin as lead inhibitor of Leishmania donovani’s O-acetyltransferase: a computational study","authors":"Pragati Nigam,&nbsp;Abhishek Sharma,&nbsp;Pragati Mahur,&nbsp;Amit Kumar Singh,&nbsp;Jayaraman Muthukumaran,&nbsp;Monika Jain","doi":"10.1007/s11696-024-03744-4","DOIUrl":"10.1007/s11696-024-03744-4","url":null,"abstract":"<div><p>Leishmaniasis, a protozoan disease with significant global morbidity, manifests as Cutaneous, Mucocutaneous, and Visceral forms caused by Leishmania species. Visceral Leishmaniasis (VL), caused by <i>Leishmania donovani</i>, poses particular fatality due to its infiltration of the central nervous system (CNS). The emergence of multidrug resistance (MDR) in L<i>. donovani</i> underscores the need for alternative therapeutic strategies. Plant secondary metabolites, acting as inhibitors against L<i>. donovani's</i> survival pathways, present a promising avenue for drug development. The cysteine synthase pathway, crucial for L<i>. donovani’s</i> survival, can be targeted for inhibition, focusing on the O-acetyltransferase (OASS) enzyme. OASS, pivotal in this pathway and absent in humans, becomes an attractive drug target. Initiating with the selection and optimization of OASS's 3D structure (PDB Id-3TBH), virtual screening against a plant metabolite library identified lead compounds with high binding affinities. Four potential candidates were shortlisted based on estimated free energy of binding and drug likeliness. These candidates underwent molecular dynamics simulations, providing insights into protein–ligand interactions via structural analyses. Additionally, Molecular Mechanics/Poisson-Boltzmann Surface Area (MM/PBSA) analysis calculated binding free energies. Results indicated Skimmin (IMPHY007363) as a potential lead molecule for inhibiting OASS in <i>Leishmania donovani</i>, showing promise for further drug development against this devastating disease.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 18","pages":"9311 - 9324"},"PeriodicalIF":2.2,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Amyloid-beta aggregation and advanced glycation end-products inhibitory activities of Pandanus amaryllifolius Roxb. alkaloids: insights from in vitro and computational investigations","authors":"Mario A. Tan,&nbsp;Joe Anthony H. Manzano,&nbsp;Hayato Ishikawa","doi":"10.1007/s11696-024-03747-1","DOIUrl":"10.1007/s11696-024-03747-1","url":null,"abstract":"<div><p>Alzheimer's disease (AD) is characterized by cognitive decline and behavioral changes, with the formation of amyloid-<i>beta</i> (Aβ) plaques as one of the underlying mechanisms responsible for its progression. Advanced glycation end-products (AGEs) have also been linked to AD pathology, contributing to oxidative stress and amyloid plaque formation. <i>Pandanus amaryllifolius</i> has shown potential in inhibiting Aβ aggregation and AGE formation, suggesting a multifaceted approach for managing AD. In this study, alkaloids isolated from the crude base extract of <i>P. amaryllifolius</i> leaves were explored for their in vitro inhibitory effects on AGEs formation and Aβ aggregation. Results showed that pandamarilactonines A (<b>3</b>) (74% at 100 μg/mL and 50% at 50 μg/mL) and B (<b>8</b>) (56% at 100 μg/mL and 34% at 50 μg/mL) exhibited highest inhibitory activities on AGEs formation using the BSA-dextrose model. Pandamarilactonine A (<b>3</b>) (74%) also exhibited Aβ aggregation inhibition, along with pandanusine B (<b>4</b>) (66%) and pandamarilactonine B (<b>8</b>) (63%), using the Thioflavin T assay. Molecular docking studies further supported these findings, revealing strong binding affinities between the alkaloids and Aβ oligomeric structures. Pandamarilactonine A (<b>3</b>) and pandamarilactonine B (<b>8</b>) showed the best binding affinity to the Aβ dodecameric structure (BE = − 7.5 to − 7.7 kcal/mol), thus corroborating with the in vitro results. Hence, these findings suggest that the <i>Pandanus</i> alkaloids could serve as promising candidates for further development as therapeutic agents against AD. However, in vivo studies are necessary to validate these findings, and further exploration of the structure–activity relationships could aid in the rational design of drug candidates utilizing the <i>Pandanus</i> alkaloids.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 18","pages":"9359 - 9367"},"PeriodicalIF":2.2,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Response surface methodology for optimizing crude oil desalting unit performance in iraq","authors":"Saja M. Alardhi,&nbsp;Ali M. Mohsen,&nbsp;Sura J. Mohammed Breig,&nbsp;Noor M. Jabbar,&nbsp;Mohamad J. Alfaker,&nbsp;Ali D. Salman,&nbsp;Karrar O. Kareem,&nbsp;Ali M. Abd,&nbsp;Forat Y. AlJaberi","doi":"10.1007/s11696-024-03729-3","DOIUrl":"10.1007/s11696-024-03729-3","url":null,"abstract":"<div><p>Emulsions in petroleum production pose challenges like equipment corrosion, pipeline pressure drops, pumping costs, and catalyst poisoning, leading to increased production costs and technical and environmental issues. The complexity of emulsions necessitates using cost-effective and efficient de-emulsifiers for effective treatment. Desalting units are often installed in crude oil production units to remove water-soluble salts from an oil stream. To optimize this process, the desalting unit should be modeled. The research employs Response Surface Methodology (RSM) to analyze the efficiency of the desalting unit based on various input parameters. The result shows that the mentioned model agrees with the experimental data. The experiments were designed using response surface methodology; these parameters and their interaction are significant, and determination coefficient R² for water content and salt concentration equal 0.9246 and 0.9901 in respective in addition difference between R_adj and R_pred less than 0.2 for two responses, R_adj and R_pred for water content 0.8491 and0.6082 and salt concentration 0.9803 and 0.9464, respectively. The result revealed that minimum water content of 0.03%(V/V) and salt concentration of 85 ppm, which agreement with predicted responses, was 0.05%v/v and 70 ppm, respectively, when the temperature was 45.1 °C, API 29, initial water content was 2.07 and initial salt concentration was 5344.04, respectively.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 17","pages":"9091 - 9102"},"PeriodicalIF":2.2,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydroisomerization of n-hexane over Pt/TiO2 catalysts","authors":"Sara A. Al-Naib,&nbsp;Haider A. Al-Jendeel","doi":"10.1007/s11696-024-03727-5","DOIUrl":"10.1007/s11696-024-03727-5","url":null,"abstract":"<div><p>One of the most important processes to obtain gasoline with high octane numbers is isomerization. In this paper, Pt/TiO₂ was prepared successfully by using the sol–gel method by hydrolysis of titanium tetraisopropoxide as a titania source with ethanol and then platinum was loaded on the synthesized catalyst; the result shows that the sample prepared has a good crystallinity with a surface area of about 85 m²/g and a pore volume of 0.1938 cm³/g, while XRD shows that the prepared sample was anatase phase. The effect of both temperature and liquid hourly space velocity of the prepared catalyst was achieved by hydroisomerization of n-hexane in a fixed bed reactor with a temperature of 200–275 °C and LHSV 0.5–2h⁻¹. The results show that the conversion of n-hexane was increased with increasing temperature and decreasing LHSV; the maximum conversion achieved at temperature 275 °C and 0.5 h⁻¹ was 63.54% at atmospheric pressure.</p></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 17","pages":"9069 - 9076"},"PeriodicalIF":2.2,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}