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Irfan M, Qadir MB, Afzal A, Shaker K, Salman SM, Majeed N, Indrie L, Albu A. Investigating the effect of different filaments and yarn structures on mechanical and physical properties of dual-core elastane composite yarns. Heliyon 2023; 9:e20007. [PMID: 37809450 PMCID: PMC10559734 DOI: 10.1016/j.heliyon.2023.e20007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 09/07/2023] [Accepted: 09/08/2023] [Indexed: 10/10/2023] Open
Abstract
Dual-core yarns, containing two filaments within the core of the yarn, have gained increasing commercial and research interest recently, especially in denim manufacturing. The use of multi-components in dual-core yarns allows for tailoring the properties of the yarn and denim fabric. The type of filaments and fibers and their surface characteristics play a role in fiber-to-fiber cohesion within yarn structure. However, little has been reported regarding the effect of different filaments on the properties of dual-core yarns. The objective of this study was to investigate the effect of three different filaments, T400, polyester flat (PET flat) and polyester textured (PET textured) as well as two yarn structures, siro versus non-siro, on tensile, elastic and other properties of dual-core yarns at same twist level and linear density of the yarn. The results showed that the siro spun dual-core yarn containing T400 exhibited 25% higher tenacity compared with yarns containing other filaments. However, the plastic deformation of the yarn containing PET flat filament, having a higher initial modulus, was at a relatively lower level compared with T400 and PET textured. Overall, the siro yarn structure showed lower imperfections and higher tenacity compared with the non-siro yarn structure. The dual-core yarn containing T400 showed a higher level of moisture wicking compared with other filaments which can add to the comfort properties but a similar hairiness level. The findings of this study suggest that the use of a filament with a higher initial modulus can improve the stretch and recovery behavior of the dual-core yarns.
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Affiliation(s)
- Muhammad Irfan
- Department of Textile Engineering, National Textile University Faisalabad, Pakistan
| | - Muhammad Bilal Qadir
- Department of Textile Engineering, National Textile University Faisalabad, Pakistan
| | - Ali Afzal
- Department of Textile Engineering, National Textile University Faisalabad, Pakistan
| | - Khubab Shaker
- Department of Materials, National Textile University Faisalabad, Pakistan
| | - Syed Muhammad Salman
- Department of Textile Engineering, National Textile University Faisalabad, Pakistan
| | - Nasir Majeed
- National Textile Research Center, National Textile University Faisalabad, Pakistan
| | - Liliana Indrie
- Faculty of Energy Engineering and Industrial Management, Department of Textiles, University of Oradea, B. St. Delavrancea Str., no. 4, 410058, Oradea, Romania
| | - Adina Albu
- Faculty of Energy Engineering and Industrial Management, Department of Textiles, University of Oradea, B. St. Delavrancea Str., no. 4, 410058, Oradea, Romania
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Khan H, Sirajuddin M, Badshah A, Ahmad S, Bilal M, Salman SM, Butler IS, Wani TA, Zargar S. Synthesis, Physicochemical Characterization, Biological Evaluation, In Silico and Molecular Docking Studies of Pd(II) Complexes with P, S-Donor Ligands. Pharmaceuticals (Basel) 2023; 16:806. [PMID: 37375754 DOI: 10.3390/ph16060806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 05/25/2023] [Accepted: 05/26/2023] [Indexed: 06/29/2023] Open
Abstract
One homoleptic (1) and three heteroleptic (2-4) palladium(II) complexes were synthesized and characterized by various physicochemical techniques, i.e., elemental analysis, FTIR, Raman spectroscopy, 1H, 13C, and 31P NMR. Compound 1 was also confirmed by single crystal XRD, showing a slightly distorted square planar geometry. The antibacterial results obtained via the agar-well diffusion method for compound 1 were maximum among the screen compounds. All the compounds have shown good to significant antibacterial results against the tested bacterial strains, Escherichia coli, Klebsiella pneumonia, and Staphylococcus aureus, except 2 against Klebsiella pneumonia. Similarly, the molecular docking study of compound 3 has shown the best affinity with binding energy scores of -8.6569, -6.5716, and -7.6966 kcal/mol against Escherichia coli, Klebsiella pneumonia, and Staphylococcus aureus, respectively. Compound 2 has exhibited the highest activity (3.67 µM), followed by compound 3 (4.57 µM), 1 (6.94 µM), and 4 (21.7 µM) against the DU145 human prostate cancer cell line using the sulforhodamine B (SRB) method as compared to cisplatin (>200 µM). The highest docking score was obtained for compounds 2 (-7.5148 kcal/mol) and 3 (-7.0343 kcal/mol). Compound 2 shows that the Cl atom of the compound acts as a chain side acceptor for the DR5 receptor residue Asp B218 and the pyridine ring is involved in interaction with the Tyr A50 residue via arene-H, while Compound 3 interacts with the Asp B218 residue via the Cl atom. The physicochemical parameters determined by the SwissADME webserver revealed that no blood-brain barrier (BBB) permeation is predicted for all four compounds, while gastrointestinal absorption is low for compound 1 and high for the rest of the compounds (2-4). As concluding remarks based on the obtained in vitro biological results, the evaluated compounds after in vivo studies might be a good choice for future antibiotics and anticancer agents.
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Affiliation(s)
- Hizbullah Khan
- Department of Chemistry, University of Science and Technology, Bannu 28100, Pakistan
| | - Muhammad Sirajuddin
- Department of Chemistry, University of Science and Technology, Bannu 28100, Pakistan
| | - Amin Badshah
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Sajjad Ahmad
- Department of Health and Biological Sciences, Abasyn University, Peshawar 25000, Pakistan
| | - Muhammad Bilal
- Department of Chemistry, Kohat University of Science and Technology, Kohat 26000, Pakistan
| | | | - Ian S Butler
- Department of Chemistry, University of McGill, Montreal, QC H3A 0B8, Canada
| | - Tanveer A Wani
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Seema Zargar
- Department of Biochemistry, College of Science, King Saud University, P.O. Box 22452, Riyadh 11451, Saudi Arabia
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Khan Q, Zahoor M, Salman SM, Wahab M, Talha M, Kamran AW. Removal of Chromium (VI) from the Steel Mill Effluents Using the Chemically Modified Leaves of Pteris vittata as Adsorbent. Water 2022; 14:2599. [DOI: 10.3390/w14172599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Chromium (Cr), a metal that is released in appreciable amounts from the steel industry into water bodies, is not only the main causative agent of lung cancer in human but also negatively affects the metabolic activities of plants. Keeping in view the hazardous effects of Cr(VI), the present study was aimed to eliminate it from industrial effluents of steel mills installed in Dargai District Malakand, Pakistan, using chemically modified Pteris vittata plant leaves as an adsorbent. The instrumental techniques such as FTIR, surface area analysis, SEM, TGA and EDX were used to evaluate surface functionality, morphology, thermal stability and elemental composition of the modified leaves. To identify the ideal conditions for the biosorption process, batch adsorption tests were carried out under varied conditions of pH, contact time, initial metal concentration, biosorbent dose, as well as temperature. Various models, such as those of Freundlich, Jovanovich, Temkin, Langmuir, and Harkins–Jura, were utilized to explain the isothermal experimental data. The high value of R2 (0.991) was exhibited by the Langmuir model. Pseudo-first-order, power function, pseudo-second-order, intraparticle diffusion, and Natarajan–Khalaf models were employed to obtain an insight into kinetics of the process. The highest R2 value, close to unity was recorded with pseudo-second order. At pH = 2, the best elimination of Cr was observed with maximum uptake capacity qmax(66.6 mg/g) as calculated from the Langmuir isotherm. The thermodynamic analysis, which was conducted at different temperatures, showed that the nature of this sorption process was exothermic and spontaneous. The modified leaves-based biosorbent could be used as an alternative adsorbent for effective Cr elimination from water, and its use could be extended to other heavy metals and organic pollutants as well, and further experimentation are needed in this regard.
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Said M, Khan H, Murtaza G, Sirajuddin M, Badshah A, Salman SM, Gul R, Najeebullah. Guanidine based copper(II) complexes: synthesis, structural elucidation, and biological evaluation. INORG NANO-MET CHEM 2022. [DOI: 10.1080/24701556.2022.2081185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Muhammad Said
- Department of Chemistry, University of Malakand, Chakdara, Pakistan
| | - Hizbullah Khan
- Department of Chemistry, University of Science and Technology Bannu, Bannu, Pakistan
| | - Ghulam Murtaza
- Department of Chemistry, Quaid-i-Azam University Islamabad, Islamabad, Pakistan
| | - Muhammad Sirajuddin
- Department of Chemistry, University of Science and Technology Bannu, Bannu, Pakistan
| | - Amin Badshah
- Department of Chemistry, Quaid-i-Azam University Islamabad, Islamabad, Pakistan
| | | | - Rukhsana Gul
- Department of Chemistry, Kohat University of Science and Technology, Kohat, Pakistan
| | - Najeebullah
- US Pak Center for Advanced Studies in Energy, University of Engineering and Technology Peshawar, Peshawar, Pakistan
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Alamzeb M, Setzer WN, Ali S, Khan B, Rashid MU, Ihsanullah, Salman SM, Adnan, Omer M, Ali J, Ullah A. Spectral, Anti-Inflammatory, Anti-Pyretic, Leishmanicidal, and Molecular Docking Studies, Against Selected Protein Targets, of a New Bisbenzylisoquinoline Alkaloid. Front Chem 2022; 9:711190. [PMID: 34976944 PMCID: PMC8719521 DOI: 10.3389/fchem.2021.711190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 11/09/2021] [Indexed: 11/13/2022] Open
Abstract
A new bisbenzylisoquinoline named as chondrofolinol (1) and four reported compounds (2–5) were isolated and characterized from the roots of Berberis glaucocarpa Stapf. Anti-inflammatory, anti-pyretic, and leishmanicidal studies were performed against carrageenan-induced paw edema, yeast-induced pyrexia, and the promastigotes of Leishmania tropica, respectively. The new compound significantly reduced the paw volume in carrageenan-induced paw edema and rectal temperature in yeast-induced pyrexia at 10 and 20 mg/ kg of body weight. Chondrofolinol caused almost 100% inhibition of the promastigotes of Leishmania tropica. All the compounds displayed minimal cytotoxicity against THP-1 monocytic cells. In order to ascertain the potential macromolecular targets of chondrofolinol responsible for the observed anti-inflammatory and anti-leishmanial activities, a molecular docking study was carried out on relevant protein targets of inflammation and Leishmania. Protein targets of human endoplasmic reticulum aminopeptidase 2 (ERAP2) and human matrix metalloproteinase-1 (MMP-1) for inflammation and protein targets of N-myristoyltransferase (NMT), tyrosyl-tRNA synthetase (TyrRS), and uridine diphosphate-glucose pyrophosphorylase (UGPase) for Leishmania major were selected after thorough literature search about protein targets responsible for inflammation and Leishmania major. Chondrofolinol showed excellent docking to ERAP2 and to MMP-1. The Leishmania major protein targets with the most favorable docking scores to chondrofolinol were NMT, TyrRS, and UGPase. The study indicated that bisbenzylisoquinoline and isoquinoline alkaloids possess anti-pyretic, anti-inflammatory, and anti-leishmanial properties with minimal cytotoxicity and therefore, need to be further explored for their therapeutic potential.
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Affiliation(s)
| | - William N Setzer
- Department of Chemistry, University of Alabama in Huntsville, Huntsville, AL , United States
| | - Saqib Ali
- Department of Chemistry, University of Kotli, Kotli, Pakistan
| | - Behramand Khan
- Department of Chemistry, Islamia College University, Peshawar, Pakistan
| | - Mamoon-Ur- Rashid
- Department of Chemistry, Baluchistan University of Information Technology, Engineering and Management Sciences (BUITEMS), Takatu Campus, Quetta, Pakistan
| | - Ihsanullah
- Institute of Chemical Sciences, University of Swat, Swat, Pakistan
| | | | - Adnan
- Institute of Chemical Sciences, University of Swat, Swat, Pakistan
| | - Muhammad Omer
- Institute of Chemical Sciences, University of Swat, Swat, Pakistan
| | - Javed Ali
- Department of Chemistry, Kohat University of Science and Technology (KUST), Kohat, Pakistan
| | - Asad Ullah
- Department of Chemistry, Islamia College University, Peshawar, Pakistan
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Rehan I, Gondal MA, Rehan K, Sultana S, Khan S, Rehman MU, Waheed A, Salman SM. Nondestructive Determination of Chromium, Nickel, and Zinc in Neem Leaves and Facial Care Products by Laser Induced Breakdown Spectroscopy (LIBS). ANAL LETT 2021. [DOI: 10.1080/00032719.2021.1979572] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Imran Rehan
- Department of Physics, Islamia College University, Peshawar, Pakistan
| | - Mohammed A. Gondal
- Physics Department, IRC-Hydrogen and Energy Storage, K.A.CARE Energy Research and Innovation Center, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
| | - Kamran Rehan
- CAS key Laboratory of Micro-scale Magnetic Resonance, University of Science and Technology China, Hefei, China
| | - Sabiha Sultana
- Department of Chemistry, Islamia College University, Peshawar, Pakistan
| | - Saranjam Khan
- Department of Physics, Islamia College University, Peshawar, Pakistan
| | - Mujeeb Ur Rehman
- Department of Electrical Engineering, Faculty of Engineering and Applied Sciences, Riphah International University, Islamabad, Pakistan
| | - Abdul Waheed
- Department of Physics, Islamia College University, Peshawar, Pakistan
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Noreen N, Ullah A, Salman SM, Mabkhot Y, Alsayari A, Badshah SL. New insights into the spread of resistance to artemisinin and its analogues. J Glob Antimicrob Resist 2021; 27:142-149. [PMID: 34517141 DOI: 10.1016/j.jgar.2021.09.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 08/19/2021] [Accepted: 09/02/2021] [Indexed: 12/22/2022] Open
Abstract
Plasmodium falciparum, the causative agent of malaria, has been developing resistance to several drugs worldwide for more than five decades. Initially, resistance was against drugs such as chloroquine, pyrimethamine, sulfadoxine, mefloquine and quinine. Research studies are now reporting parasites with resistance to the most effective and novel drug used against malaria infection worldwide, namely artemisinin. For this reason, the first-line treatment strategy of artemisinin-based combination therapy is becoming unsuccessful in areas where drug resistance is highly prevalent. The increase in artemisinin-resistant P. falciparum strains has threatened international efforts to eliminate malarial infections and to reduce the disease burden. Detection of several phenotypes that display artemisinin resistance, specification of basic genetic factors, the discovery of molecular pathways, and evaluation of its clinical outcome are possible by the current series of research on genomics and transcriptomic levels in Asia and Africa. In artemisinin resistance, slow parasite clearance among malaria-infected patients and enhanced in vitro survival of parasites occurs at the early ring stage. This resistance is due to single nucleotide polymorphisms within the Kelch 13 gene of the parasite and is related to significantly upregulated resistance signalling pathways; thus, the pro-oxidant action of artemisinins can be antagonised. New strategies are required to halt the spread of artemisinin-resistant malarial parasites.
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Affiliation(s)
- Noreen Noreen
- Department of Chemistry, Islamia College University, Peshawar 25120, Pakistan
| | - Asad Ullah
- Department of Chemistry, Islamia College University, Peshawar 25120, Pakistan
| | | | - Yahia Mabkhot
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Khalid University, P.O. Box 960, Abha 61421, Saudi Arabia.
| | - Abdulrhman Alsayari
- Department of Pharmacognosy, College of Pharmacy, King Khalid University, Abha, Saudi Arabia
| | - Syed Lal Badshah
- Department of Chemistry, Islamia College University, Peshawar 25120, Pakistan.
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Ali N, Ali F, Saeed S, Said A, Sheikh ZA, Salman SM, Bilal M. Synthesis and physicochemical investigation of imide‐functionalized silica nanocomposites. J Appl Polym Sci 2021. [DOI: 10.1002/app.50646] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Nisar Ali
- Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, National and Local Joint Engineering Research Centre for Deep Utilization Technology of Rock‐salt Resource, Faculty of Chemical Engineering Huaiyin Institute of Technology Huaian China
| | - Farman Ali
- Department of Chemistry Hazara University Mansehra KPK Pakistan
| | - Shaukat Saeed
- Department of Chemistry Pakistan Institute of Applied Sciences (PIEAS) Islamabad Pakistan
| | - Amir Said
- Department of Chemistry Hazara University Mansehra KPK Pakistan
| | | | | | - Muhammad Bilal
- School of Life Science and Food Engineering Huaiyin Institute of Technology Huaian China
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Ali N, Ali F, Saeed S, Said A, Sheikh ZA, Salman SM, Bilal M. Cover Image, Volume 138, Issue 24. J Appl Polym Sci 2021. [DOI: 10.1002/app.50733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Khan K, Khan H, Siraj-ud-Din M, Salman SM. Preparation of silica nanoparticles facilitated by Saccharum munja plant. INORG NANO-MET CHEM 2021. [DOI: 10.1080/24701556.2020.1799395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Khyrullah Khan
- Department of Chemistry, University of Science and Technology, Bannu, Khyber Pakhtunkhwa, Pakistan
| | - Hizbullah Khan
- Department of Chemistry, University of Science and Technology, Bannu, Khyber Pakhtunkhwa, Pakistan
| | - Muhammad Siraj-ud-Din
- Department of Chemistry, University of Science and Technology, Bannu, Khyber Pakhtunkhwa, Pakistan
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Wahab M, Zahoor M, Salman SM, Naz S. Effective removal of tetracycline from water by batch method using activated carbon, magnetic carbon nanocomposite, and membrane hybrid technology. Z PHYS CHEM 2021. [DOI: 10.1515/zpch-2020-1698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In this study two adsorbents (activated carbon; AC and magnetic activated carbon; MCN) were prepared from Dalbergia sissoo sawdust and used as potential adsorbents for the removal of tetracycline (TC) from water. Both the adsorbents were characterized by instrumental techniques like energy dispersive x-ray (EDX), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), x-ray diffraction (XRD), surface area analyzer and thermal gravimetric/Differential thermal analysis (TG/DTA). The effect of antibiotic initial concentration, contact-time, pH, adsorbent-dose, and temperature were evaluated to determine optimum adsorption conditions. The optimum TC concentration for both AC and MCN was 120 mg/L while optimum time of saturation for both adsorbents was 120 min. The optimum pH determined was five while optimum adsorbent dose was 0.1 g. The adsorption isothermal data of both sets of experiments was best explained by Langmuir model. The kinetic data was well explained by pseudo-second order kinetics model. The ΔH° (enthalpy change) and ΔSo (entropy change) were; −14.989 and 25.174 kJ/mol for AC and −11.628 and 51.302 kJ/mol for MCN respectively. The values of Gibbs free energy (ΔG°) calculated for AC were 7.36, −7.99, −7.36, −7.61, and −8.12 kJ/mol while for MCN these were −15.02, −15.53, −16.05, −16.56, and −17.07 kJ/mol corresponding to temperatures; 298, 303, 313, 323, and 333 K. To control fouling in ultra-filtration, nano-filtration, and reverse osmosis membranes caused by TC, and both adsorbents, a continuous stirred reactor was connected in series with membrane pilot plant. The improvement brought about by both adsorbent in parameters like % retention and permeate flux was also evaluated. Comparatively, better improvement was brought about in % retention and permeates flux by MCN.
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Affiliation(s)
- Muhammad Wahab
- Department of Chemistry , Islamia College University , Peshawar , 25000 , Khyber Pakhtunkhwa , Pakistan
| | - Muhammad Zahoor
- Department of Biochemistry , University of Malakand , Chakdara Dir Lower , 18800 , Khyber Pakhtunkhwa , Pakistan
| | - Syed Muhammad Salman
- Department of Chemistry , Islamia College University , Peshawar , 25000 , Khyber Pakhtunkhwa , Pakistan
| | - Sumaira Naz
- Department of Biochemistry , University of Malakand , Chakdara Dir Lower , 18800 , Khyber Pakhtunkhwa , Pakistan
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Sultana S, Rehan K, Rehan I, Ali F, Waris S, Zahoor M, Salman SM, Khan S, Rehan MS. Physicochemical and instrumental characterization of rice husk and its potential use as a low cost adsorbent for mutagenic dye bromophenol blue. Z PHYS CHEM 2020. [DOI: 10.1515/zpch-2020-1670] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In this study fine powder of rice husk were used as novel adsorbent for the removal of bromophenol dye. Different conventional physicochemical analysis and instrumental techniques were used to characterize the adsorbent. The surface area of the adsorbent was found to be 160.6 m2/g with bulk density of 1.139 g/dm3. Proximate and ultimate analysis showed that the selected material is a rich source of carbon with the advantage of not having Sulphur contents. FTIR and SEM analysis confirmed the surface modification via aqua regia in comparison to parental material (that have enhanced its surface porosity). The maximum uptake capacity (0.8 mg/g) of dye was reached at pH 3, 20 ppm of adsorbate concentration, and 0.5 g of treated rice husk dosage at room temperature and 60 min of equilibrium time. The equilibrium adsorption data was best explained by Freundlich adsorption isotherm with R
2 value of 0.998. Kinetic studies revealed that adsorption follows pseudo second order kinetic model with R
2 value of 0.997, K
2 equal to 0.831 (g/mg min), and q
e
value of 0.97 mg/g. The thermodynamic parameters (∆S° = 6.78 J/mol, ∆H° = 1501 J/mol, ∆G° −1.50, 0.5, 0.621 and 0.0787 kJ/mol corresponding to 293, 303, 313 and 333 K) pointed towards the endothermic and spontaneous nature of the process.
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Affiliation(s)
- Sabiha Sultana
- Department of Chemistry , Islamia College University Peshawar , Peshawar , KPK , Pakistan
| | - Kamran Rehan
- Wuhan Institute of Physics and Mathematics, Wuhan , Chinese Academy of Sciences , Beijing , China
| | - Imran Rehan
- Department of Physics , Islamia College University Peshawar , Peshawar , Pakistan
| | - Fahad Ali
- Department of Chemistry , Islamia College University Peshawar , Peshawar , KPK , Pakistan
| | - Salman Waris
- Department of Chemistry , Islamia College University Peshawar , Peshawar , KPK , Pakistan
| | - Muhammad Zahoor
- Department of Biochemistry , University of Malakand , Chakdara Dir Lower , KPK , Pakistan
| | - Syed Muhammad Salman
- Department of Chemistry , Islamia College University Peshawar , Peshawar , KPK , Pakistan
| | - Sanaullah Khan
- Department of Chemistry , Women University , Swabi , KPK , Pakistan
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Ali F, Ali N, Bibi I, Said A, Nawaz S, Ali Z, Salman SM, Iqbal HM, Bilal M. Adsorption isotherm, kinetics and thermodynamic of acid blue and basic blue dyes onto activated charcoal. Case Studies in Chemical and Environmental Engineering 2020. [DOI: 10.1016/j.cscee.2020.100040] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Salman SM, Zahoor M, Shahwar D, Nisar A, Ali A, Khan H, Ali F. Chemically modified Quercus dilatata plant leaves for Pb (II), Cd (II), and Cr (VI) ions remediation from aqueous solution. Z PHYS CHEM 2020. [DOI: 10.1515/zpch-2020-1677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The current investigation deals with the removal of Pb (II), Cd (II), and Cr (VI) ions by using chemically modified Quercus dilatata leaves (CMQDL) treated with nitric acid (HNO3), and calcium chloride (CaCl2). Batch biosorption experiments were performed to determine the optimal conditions of pH, biomass dose, temperature, contact time, and initial metal concentration for the utmost removal of heavy metals from water. The structural morphology and functionalities were explained by SEM and FTIR analysis. The maximum biosorption capacities for remediation of Pb (II), Cd (II), and Cr (VI) ions via CMQDL were 17.54, 20.408, 20.83 mg g−1, respectively at the optimal conditions. The Langmuir and Freundlich isotherm were applied to explore the equilibrium data however Freundlich isotherm model best evaluate the equilibrium data with high regression correlation coefficient (R2) values of 0.985, 0.826, and 0.919 for the elimination of Pb (II) Cd (II), and Cr (VI) ions, respectively. The kinetic study proposed that the remediation operation best obeyed the kinetic pseudo 2nd order model. The calculated thermodynamics functions like change in entropy (ΔS°), change in enthalpy (ΔH°) and Gibbs free energy (ΔG°) revealed that the removal of Pb (II) ions via the CMQDL was viable, exothermic and spontaneous, Cd (II) was endothermic and spontaneous and Cr (VI) was endothermic and non-spontaneous. The current study explored that CMQDL can be used for the remediation of Pb (II), Cd (II), and Cr (VI) ions, respectively.
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Affiliation(s)
- Syed Muhammad Salman
- Department of Chemistry , Islamia College University , Peshawar , 25000 , Khyber Pakhtunkhwa , Pakistan
| | - Muhammad Zahoor
- Department of Biochemistry , University of Malakand , Chakdara Dir Lower , 18800 , Khyber Pakhtunkhwa , Pakistan
| | - Durre Shahwar
- Department of Zoology , Islamia College University , Peshawar , 25000 , Khyber Pakhtunkhwa , Pakistan
| | - Amara Nisar
- Department of Chemistry , Islamia College University , Peshawar , 25000 , Khyber Pakhtunkhwa , Pakistan
| | - Asad Ali
- Department of Chemistry , Islamia College University , Peshawar , 25000 , Khyber Pakhtunkhwa , Pakistan
| | - Hizbullah Khan
- Department of Chemistry , University of Science and Technology , Bannu , Khyber Pakhtunkhwa , Pakistan
| | - Farman Ali
- Department of Chemistry , Hazara University Mansehra , Dhodial , Khyber Pakhtunkhwa , Pakistan
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15
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Stefanello ST, Mizdal CR, Gonçalves DF, Hartmann DD, Dobrachinski F, de Carvalho NR, Salman SM, Sauer AC, Dornelles L, de Campos MMA, Soares FAA. The insertion of functional groups in organic selenium compounds promote changes in mitochondrial parameters and raise the antibacterial activity. Bioorg Chem 2020; 98:103727. [DOI: 10.1016/j.bioorg.2020.103727] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 03/03/2020] [Accepted: 03/04/2020] [Indexed: 01/01/2023]
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16
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Khan M, Ahad G, Khan A, Shah S, Kanwal, Salar U, Salman SM, Khan KM. Antiglycation Activity of N, N-Diethylthiobarbiturates Derivatives. LETT DRUG DES DISCOV 2020. [DOI: 10.2174/1570180816666190516111516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Previous identification of N,N-diethylthiobarbiturates as potential
α-glucosidase inhibitory potential prompted us to investigate the antiglycation activity of these
synthetic compounds (1-25) in order to identify the lead candidates for their possible antidiabetic
potential.
Methods:
Synthetic compounds (1-25) were evaluated for their antiglycation activity using Bovine
Serum Albumin assay (BSA).
Results:
Compounds exhibited varying degree of inhibition in the range of IC50 = 61.16 ± 2.3 - 656.71
± 2.5 µM as compared to the standard rutin (IC50 = 294.5 ± 1.50 µM). Among the twenty five
synthetic molecules, seven compounds showed good activity in comparison with the standard.
Compound 4 (IC50 = 61.16 ± 2.3 µM) having hydroxy substituents was the most active molecule of
the library. This study revealed that compound 4 has dual acting antidibetic molecule.
Conclusion:
In conclusion, the synthetic N,N-diethylthiobarbiturates can act as lead molecules.
Furthermore, synthetic variations on N,N-diethylthiobarbituric acid moiety might be helpful in
generating a library of potential anti diabetic agent. Especially, compound 4 has been identified as
dual acting antidiabetic agent i.e. α-glucosidase inhibitor and antiglycating agent.
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Affiliation(s)
- Momin Khan
- Department of Chemistry, Abdul Wali Khan University, Mardan 23200, Pakistan
| | - Ghulam Ahad
- Department of Chemistry, Abdul Wali Khan University, Mardan 23200, Pakistan
| | - Ajmal Khan
- Natural and Medical Sciences Research Center, University of NizwaBirkat Al Mauz, Nizwa 616, Oman
| | - Sana Shah
- Department of Chemistry, Abdul Wali Khan University, Mardan 23200, Pakistan
| | - Kanwal
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
| | - Uzma Salar
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Syed Muhammad Salman
- Department of Chemistry, Islamia College University Peshawar, Peshawar 25120, Pakistan
| | - Khalid Mohammed Khan
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
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17
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Ahmad S, Munir S, Zeb N, Ullah A, Khan B, Ali J, Bilal M, Omer M, Alamzeb M, Salman SM, Ali S. Green nanotechnology: a review on green synthesis of silver nanoparticles - an ecofriendly approach. Int J Nanomedicine 2019; 14:5087-5107. [PMID: 31371949 PMCID: PMC6636611 DOI: 10.2147/ijn.s200254] [Citation(s) in RCA: 170] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Accepted: 03/26/2019] [Indexed: 12/19/2022] Open
Abstract
Background: Nanotechnology explores a variety of promising approaches in the area of material sciences on a molecular level, and silver nanoparticles (AgNPs) are of leading interest in the present scenario. This review is a comprehensive contribution in the field of green synthesis, characterization, and biological activities of AgNPs using different biological sources. Methods: Biosynthesis of AgNPs can be accomplished by physical, chemical, and green synthesis; however, synthesis via biological precursors has shown remarkable outcomes. In available reported data, these entities are used as reducing agents where the synthesized NPs are characterized by ultraviolet-visible and Fourier-transform infrared spectra and X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Results: Modulation of metals to a nanoscale drastically changes their chemical, physical, and optical properties, and is exploited further via antibacterial, antifungal, anticancer, antioxidant, and cardioprotective activities. Results showed excellent growth inhibition of the microorganism. Conclusion: Novel outcomes of green synthesis in the field of nanotechnology are appreciable where the synthesis and design of NPs have proven potential outcomes in diverse fields. The study of green synthesis can be extended to conduct the in silco and in vitro research to confirm these findings.
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Affiliation(s)
- Shabir Ahmad
- Department of Chemistry, Islamia College University, Peshawar25120, Pakistan
| | - Sidra Munir
- Department of Chemistry, Islamia College University, Peshawar25120, Pakistan
| | - Nadia Zeb
- Department of Chemistry, Islamia College University, Peshawar25120, Pakistan
- Department of Chemistry, Government Girls Degree College, Peshawar, Pakistan
| | - Asad Ullah
- Department of Chemistry, Islamia College University, Peshawar25120, Pakistan
| | - Behramand Khan
- Department of Chemistry, Islamia College University, Peshawar25120, Pakistan
| | - Javed Ali
- Department of Chemistry, Kohat University of Science and Technology, Kohat, Pakistan
| | - Muhammad Bilal
- Department of Chemistry, Kohat University of Science and Technology, Kohat, Pakistan
| | - Muhammad Omer
- Institute of Chemical Sciences, University of Swat, Swat, 19201, Pakistan
| | - Muhammad Alamzeb
- Department of Chemistry, University of Kotli 11100, Azad Jammu and Kashmir, Pakistan
| | | | - Saqib Ali
- Department of Chemistry, University of Kotli 11100, Azad Jammu and Kashmir, Pakistan
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18
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Salman SM, Ali A, Khan B, Iqbal M, Alamzeb M. Thermodynamic and kinetic insights into plant-mediated detoxification of lead, cadmium, and chromium from aqueous solutions by chemically modified Salvia moorcroftiana leaves. Environ Sci Pollut Res Int 2019; 26:14339-14349. [PMID: 30868463 DOI: 10.1007/s11356-019-04611-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Accepted: 02/18/2019] [Indexed: 06/09/2023]
Abstract
Thermodynamic and kinetic aspects for the biosorptive removal of Pb, Cd, and Cr metals from water using Chemically Modified Leaves of Salvia moorcroftiana (CMSML) were determined. Different parameters including pH, temperature, metal's initial concentration, biomass dosage, and contact time were optimized. Optimum biosorptions of Pb, Cd, and Cr were attained at pH values of 6.0, 7.0, and 3.0 respectively. Batch experiments showed maximum removal of both Pb and Cd at 40 °C and that of Cr at 30 °C. Biosorption capability of CMSML was observed to decrease with raising temperature. Optimal equilibrium times for Pb, Cd, and Cr uptake were 120, 60, and 120 min respectively. Based on the values of regression correlation coefficients (R2), the current data is explained better by applying Langmuir isotherms than the Freundlich model. Maximum biosorbent capabilities (qmax) for Pb, Cd, and Cr were approximately 270.27, 100.00, and 93.45 mg/g respectively. Thermodynamically, removal of all the three metal ions was shown to be exothermic and spontaneous.
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Affiliation(s)
- Syed Muhammad Salman
- Department of Chemistry, Islamia College University, Peshawar, Khyber Pakhtunkhwa, 25120, Pakistan.
| | - Asad Ali
- Department of Chemistry, Islamia College University, Peshawar, Khyber Pakhtunkhwa, 25120, Pakistan
- Collaborative Innovation Center of Sustainable Energy Materials, Guangxi University, Nanning, 530004, People's Republic of China
| | - Behramand Khan
- Department of Chemistry, Islamia College University, Peshawar, Khyber Pakhtunkhwa, 25120, Pakistan
| | - Mehmood Iqbal
- Pakistan Council of Scientific and Industrial Research (PCSIR) Lab Complex, Jamrud road, Peshawar, 25120, Pakistan
| | - Muhammad Alamzeb
- Department of Chemistry, Faculty of Sciences, University of Kotli, Kotli, Azad Jammu and Kashmir, 11100, Pakistan
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19
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Salman SM. Modeling a Fast-Slow Bitrophic Food Chain with Harvesting. Nonlinear Dynamics Psychol Life Sci 2019; 23:177-197. [PMID: 30898191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In the present paper, the Rosenzweig-MacArthur predator-prey model (RM), which is a bitrophic food chain model, is considered. We develop the model by adding two assumptions. First, we assume that both species are of economic interest, that is can be harvested. Second, we assume that each specie has its own time scale which range from fast for the prey to slow for the predator. We consider that both the death rate and the catch of the predator are very small which leads to a fast-slow dynamical system. That is, the RM model is transformed into a singular perturbed system with a perturbation parameter E in the set [0,1]. The existence and stability of equilibria are discussed for E > 0. The model experiences both transcritical and Hopf bifurcations for E>0. The singular perturbation model at E = 0 is discussed by separating the system into two subsystems; fast and slow and studying them simultaneously. When 0<E<1, the model is discussed using geometric singular perturbation techniques. The solution of the model is approximated on the slow manifold and the numerical simulations give very good results for E = 0.005.
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Affiliation(s)
- S M Salman
- Alexandria University, Alexandria, Egypt
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20
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Abo-Mosallam HA, Salama SN, Salman SM. Formulation and characterization of glass-ceramics based on Na2Ca2Si3O9-Ca5(PO4)3F-Mg2SiO4-system in relation to their biological activity. J Mater Sci Mater Med 2009; 20:2385-2394. [PMID: 19579061 DOI: 10.1007/s10856-009-3811-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2009] [Accepted: 06/25/2009] [Indexed: 05/28/2023]
Abstract
Glasses having a chemical composition based on combeite [Na(2)Ca(2)Si(3)O(9)]-fluoroapatite [Ca(5)(PO(4))(3)F] and forsterite [Mg(2)SiO(4)] system were crystallized through controlled heat-treatment. Two forms of sodium calcium silicate e.g. combeite Na(2)Ca(2)Si(3)O(9) and pectolite Na(2)CaSi(3)O(8), were formed together with diopside (CaMgSi(2)O(6)) and monticellite (CaMgSiO(4)) in addition to fluoroapatite (Ca(5)(PO(4))(3)F) phases by thermal treatment of the glasses. Selected glass-ceramics were exposed to a simulated body fluid solution (SBF) which is close to human plasma for 3 weeks. Energy dispersive X-ray analysis (EDX) and inductive coupled plasma (ICP) analysis confirmed the formation of an apatite layer which indicate bioactivity in the all crystallized sample. A decreasing of surface bioactivity with increasing Mg(2)SiO(4)/Na(2)Ca(2)Si(3)O(9) replacement was observed as indicated by the decrease in the amount of apatite layer on the surface of the crystallized specimens. The Vicker's microhardness of the studied glass-ceramic materials are between 5,047 and 6,781 MPa.
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Affiliation(s)
- H A Abo-Mosallam
- Glass Research Department, National Research Centre, El-Behoos St. Dokki, Cairo, Egypt.
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21
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Abstract
We describe the clinical presentation and course of a patient with autoerythrocyte sensitization (Gardner-Diamond) syndrome, and review the literature for similar cases. A 37-yr-old female presented with recurrent episodes of painful ecchymotic bruising over the anterior aspect of both thighs. These episodes were precipitated by emotional stress. The diagnosis was confirmed by induction of similar lesions by intradermal injection of the patient's own washed red blood cells and hemoglobin. The lesions did not recur for 6 months after the cause of her emotional stress was relieved. Autoerythrocyte sensitization (Gardner-Diamond) syndrome should be considered in the differential diagnosis of purpura, especially in patients with psychiatric problems.
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Affiliation(s)
- I W Uthman
- Department of Internal Medicine, Faculty of Medicine, American University of Beirut, Lebanon.
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22
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Affiliation(s)
- S M Salman
- Department of Dermatology, American University of Beirut Medical Center, Lebanon
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23
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Phillips TJ, Salman SM, Bhawan J, Rogers GS. Burn scar carcinoma. Diagnosis and management. Dermatol Surg 1998; 24:561-5. [PMID: 9598012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND The term Marjolin ulcer is now synonymous with malignant transformation of chronic ulcers, sinus tracts, and burn scars. OBJECTIVE To illustrate the importance of incisional or excisional biopsies in cases of suspected burn scar carcinoma. METHODS Case report and review of the literature. RESULTS Multiple punch biopsies were negative while a complete excision revealed the diagnosis of squamous cell carcinoma. CONCLUSION Because of the focal nature of malignant change in burn scars, incisional or excisional biopsy should be performed.
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Affiliation(s)
- T J Phillips
- Department of Dermatology, Boston University School of Medicine, Massachusetts 02118-2394, USA
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24
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Abstract
A patient with Klippel-Trenaunay syndrome who developed basal cell and squamous cell carcinomas on the limb affected by the vascular malformation, is reported. The nature of this association is discussed.
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Affiliation(s)
- S M Salman
- Department of Dermatology, American University of Beirut, Lebanon
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25
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Abstract
Seven patients with basal cell carcinomas presenting as nonhealing ulcers are reported. The importance of considering malignancy and taking biopsy specimens of leg ulcers that fail to respond to treatment is emphasized.
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Affiliation(s)
- T J Phillips
- Department of Dermatology, Boston University School of Medicine, Massachusetts
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26
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Abstract
Management of the aging face involves evaluation of the degree of solar elastosis, rhytidosis, and the structural changes associated with senescent skin. Chemical facial exfoliation is divided into deep, medium, and superficial based upon depth of penetration of the caustic agent used. Knowledge of the appropriate indications and technique are essential in obtaining optimal clinical results.
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Affiliation(s)
- S L Matarasso
- Department of Dermatology, University of California, San Francisco
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Affiliation(s)
- N A Sweidan
- Department of Dermatology, American University of Beirut Medical Center, Lebanon
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28
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Abstract
Two cases of acrokeratoelastoidosis comprised of smooth shiny papules on the hands, feet and legs, are reported. Focal acral hyperkeratosis, degenerative collagenous plaques of the hands and keratoelastoidosis marginalis of the hands are three closely related conditions.
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Affiliation(s)
- Z Shbaklo
- Department of Dermatology, American University of Beirut, Medical Center, Lebanon
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29
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Abstract
A small subset of patients with thin (less than 0.76 mm thick) primary cutaneous malignant melanomas develop metastases. Features that may help differentiate higher and lower risk lesions in this thickness range are reported to include the patient's age and sex, anatomic site and diameter of the primary lesion, Clark level of invasion, development of a vertical growth phase, the mitotic index, ulceration, regression, and cellular aneuploidy. In this report, we review the literature regarding the significance of these factors on the patient's prognosis.
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Affiliation(s)
- S M Salman
- Department of Dermatology, Boston University School of Medicine, Massachusetts 02118-2394
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30
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Abstract
Three clinicopathologic variants of lichen planopilaris are described. The first is characterized clinically by individual keratotic follicular papules and histologically by a lichenoid inflammatory cell infiltrate confined to the follicular epithelium. The second variant consists of erythematous to violaceous plaques, some of which show follicular prominence; the histologic appearance is that of a lichenoid inflammatory cell infiltrate that affects both follicular and interfollicular areas. The third variant manifests as follicular papules of the scalp with concomitant or subsequent cicatricial alopecia. In this variant the histologic hallmark is a lichenoid, follicular and interfollicular inflammation, associated with or followed by scarring. Overlap among the three variants exists, and hence the concept of a disease spectrum ranging from pure follicular involvement without evidence of clinical scarring to cicatricial alopecia of the scalp is advocated.
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Affiliation(s)
- M Matta
- Department of Dermatology, American University of Beirut Medical Center, Lebanon
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31
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Affiliation(s)
- N A Sweidan
- American University of Beirut (Lebanon) Medical Center
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32
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Affiliation(s)
- N A Muffarij
- American University of Beirut (Lebanon) Medical Center
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33
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Zantout HH, Kibbi AG, Salman SM, Zaynoun ST. Brownish scaly plaques. Lepromatous leprosy. Arch Dermatol 1989; 125:1571, 1573-4. [PMID: 2684027 DOI: 10.1001/archderm.125.11.1571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- H H Zantout
- American University of Beirut (Lebanon) Medical Center
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34
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Affiliation(s)
- B A Sanaknaki
- American University of Beirut Medical Center, Lebanon
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35
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Salman SM, Kibbi AG, Zaynoun S. Actinic lichen planus. A clinicopathologic study of 16 patients. J Am Acad Dermatol 1989; 20:226-31. [PMID: 2915056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The clinical and histopathologic features of actinic lichen planus in 16 patients were studied. The majority of the patients were young, and men and women were almost equally affected. The relative incidence of this condition, compared with the incidence of all forms of lichen planus, was smaller than that reported in the literature. The eruption was distributed over sun-exposed areas, with particular predilection for the face. Covered areas and mucous membranes were spared except for one patient who had involvement of the vermilion border of the lower lip. In most cases the lesions consisted of erythematous brownish plaques with an annular configuration. Less commonly, discrete and confluent papules and hypermelanotic patches, sometimes assuming a melasma-like appearance, were present. The prominent histopathologic features consisted of an interface dermatitis characterized by coarse vacuolar degeneration of the basal cell layer, a mid-dermal perivascular predominantly lymphocytic inflammatory cell infiltrate, and a significant degree of pigment incontinence. Parakeratosis, eczematous changes confined to the follicular epithelium, and a variable degree of solar elastosis were seen in some patients. Mucin deposition was noted in the reticular dermis in two cases.
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Affiliation(s)
- S M Salman
- Department of Dermatology, American University of Beirut-Medical Center, Lebanon
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36
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Jamaleddine FN, Salman SM, Shbaklo Z, Kibbi AG, Zaynoun S. Idiopathic vulvar calcinosis: the counterpart of idiopathic scrotal calcinosis. Cutis 1988; 41:273-5. [PMID: 3366012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
An asymptomatic nodule over the right labium majus of a 13-year-old girl is described. Examination of an excisional biopsy specimen revealed a well-circumscribed lobular mass of calcium deposits. No underlying laboratory abnormalities were detected. The lesion most likely represents the female counterpart of idiopathic scrotal calcinosis.
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Affiliation(s)
- F N Jamaleddine
- Department of Dermatology, American University of Beirut Medical Center, Lebanon
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37
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Abstract
Three cases of actinic lichen planus mimicking melasma are presented. Although the clinical similarity to melasma is striking, the histopathologic picture is distinctive. It is suggested that actinic lichen planus be considered in the differential diagnosis of melasma.
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Affiliation(s)
- S M Salman
- Department of Dermatology, American University of Beirut, Lebanon
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38
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Frayha RA, Atiyah F, Karam P, Ali Ahmed Z, Salman SM. Eosinophilic fasciitis terminating as progressive systemic sclerosis in a child. Dermatologica 1985; 171:291-4. [PMID: 4076501 DOI: 10.1159/000249439] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A child with clinicopathological features of eosinophilic fasciitis terminated in progressive systemic sclerosis. The clinical and laboratory similarities and disparities between these two conditions are presented.
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