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Qaisar S, Nawaz Kiani A, Jalil A. Exploring discontinuous intentions of social media users: a cognition-affect-conation perspective. Front Psychol 2024; 15:1305421. [PMID: 38371705 PMCID: PMC10869550 DOI: 10.3389/fpsyg.2024.1305421] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Accepted: 01/08/2024] [Indexed: 02/20/2024] Open
Abstract
Introduction Drawing on the cognition-affect-conation (C-A-C) framework, this study investigates how perceived information and social and system feature overload induce depression and anxiety, which leads to affect discontinuous intentions of the social media users. Methods The data collected from 570 social networking site users in China are analyzed through structural equation modeling (SEM). Results and Discussion The findings show that perceived information overload, perceived social overload, and perceived system feature overload directly affect depression and anxiety among social networking site users, which directly leads to discontinuous intentions. This study fulfills the identified need for an in-depth investigation of discontinuous behavior in social networking sites. The findings provide social networking site providers with guidelines on how to actively manage social networking site user's behavior to reduce the effects of negative emotions on social networking sites.
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Affiliation(s)
- Sara Qaisar
- International Islamic University, Islamabad, Pakistan
| | | | - Afsheen Jalil
- International Islamic University, Islamabad, Pakistan
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Siddiqa A, Majid A, Saira F, Farooq S, Qureshi R, Qaisar S. Nanodiamond embedded polyaniline/polyvinylidene fluoride nanocomposites as microfiltration membranes for removal of industrial pollution. RSC Adv 2023; 13:29206-29214. [PMID: 37809025 PMCID: PMC10552077 DOI: 10.1039/d3ra05351b] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 09/27/2023] [Indexed: 10/10/2023] Open
Abstract
Membrane fouling remains a challenge to the membrane technology. Herein, we report the fabrication of composite membranes of polyaniline/polyvinylidene fluoride (PANI/PVDF) blended with nanodiamond (ND) with improved antifouling properties. The designed membranes were characterized by XRD, FTIR and SEM techniques. Characterization analysis revealed that addition of ND has maintained the structural integrity and porosity of composite membranes. The membrane permeation and antifouling performances were tested for hydrophilicity, porosity, pure water flux, shrinkage ratio, salt rejection of zinc acetate and copper acetate, and their fouling recovery ratio (FRR) measurements. A high solvent content ratio of 0.55 and a low shrinkage ratio of <12% due to enhanced hydrophilicity and porosity of the composite membrane with fouling-recovery of membranes to 88% were achieved. Separation of copper and zinc ions from aqueous solution was achieved. These findings imply that ND-based PANI/PVDF composite membranes can effectively serve as microfiltration membranes in industrial and municipal wastewater treatment.
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Affiliation(s)
- Asima Siddiqa
- Nanoscience and Technology Division, National Centre for Physics Islamabad Pakistan
| | - Abdul Majid
- Department of Chemistry, Quaid-i-Azam University Islamabad Pakistan
| | - Farhat Saira
- Nanoscience and Technology Division, National Centre for Physics Islamabad Pakistan
| | - Saima Farooq
- Department of Biological Sciences &Chemistry, College of Arts and Science, University of Nizwa Nizwa-616 Oman
| | - Rumana Qureshi
- Department of Chemistry, Quaid-i-Azam University Islamabad Pakistan
| | - Sara Qaisar
- Nanoscience and Technology Division, National Centre for Physics Islamabad Pakistan
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Shahida S, Siddiqa A, Salim N, Qaisar S, Khan MI, Farooq U, Shanableh A, Elboughdiri N, Kolsi L, Bouazzi Y, Gasmi H. Fabrication and characterization of nanocomposite membranes for the rejection of textile dye. INORG NANO-MET CHEM 2022. [DOI: 10.1080/24701556.2022.2077373] [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)
- Shabnam Shahida
- Department of Chemistry, University of Poonch Rawalakot, Azad Kashmir, Pakistan
| | - Asima Siddiqa
- Department of Nano Science and Technology, National Centre for Physics, Islamabad, Pakistan
| | - Nida Salim
- Department of Chemistry, University of Poonch Rawalakot, Azad Kashmir, Pakistan
| | - Sara Qaisar
- Department of Nano Science and Technology, National Centre for Physics, Islamabad, Pakistan
| | - Muhammad Imran Khan
- Research Institute of Sciences and Engineering, University of Sharjah, Sharjah, United Arab Emirates
| | - Umar Farooq
- Institute of Chemistry, University of the Punjab, Lahore, Pakistan
| | - Abdallah Shanableh
- Research Institute of Sciences and Engineering, University of Sharjah, Sharjah, United Arab Emirates
| | - Noureddine Elboughdiri
- Chemical Engineering Department, College of Engineering, University of Ha’il, Ha'il, Saudi Arabia
- Chemical Engineering Process Department, National School of Engineers Gabes, University of Gabes, Gabes, Tunisia
| | - Lioua Kolsi
- Mechanical Engineering Department, College of Engineering, University of Ha’il, Ha'il, Saudi Arabia
- Laboratory of Metrology and Energy systems, University of Monastir, Monastir, Tunisia
| | - Yassine Bouazzi
- Industrial Engineering Department, College of Engineering, University of Ha’il, Ha'il, Saudi Arabia
| | - Hatem Gasmi
- Civil Engineering Department, College of Engineering, University of Ha’il, Ha'il, Saudi Arabia
- Geotechnical Engineering Research laboratory, University of Tunis El Manar, National Engineering School of Tunis, Tunis, Tunisia
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Chu J, Qaisar S, Shah Z, Jalil A. Attention or Distraction? The Impact of Mobile Phone on Users' Psychological Well-Being. Front Psychol 2021; 12:612127. [PMID: 33959065 PMCID: PMC8093572 DOI: 10.3389/fpsyg.2021.612127] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 09/30/2020] [Accepted: 02/05/2021] [Indexed: 11/13/2022] Open
Abstract
Cumulative evidence has demonstrated that mobile phone distraction, in particular among emerging adults, is a growing problem. Considerable efforts have been made to contribute to the literature by proposing cognitive emotion pre-occupation which acts as an underlying mechanism through which mobile phone distraction results in a reduction in psychological well-being. The proposed model is supported by distraction-conflict theory which reveals that users, with high attention control, are better at coping with the negative consequences of mobile phone distraction. The data, consisting of 914 University students in China, was analyzed using statistical tools. The results support that mobile phone distraction has a significant positive relationship with cognitive emotional pre-occupation which negatively affects users' psychological well-being. Our findings also reveal that attention control moderated the mediation effect of cognitive emotional pre-occupation in association with mobile phone distraction and psychological well-being. The theoretical and practical implications are also discussed along with limitations and future research.
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Affiliation(s)
- Jianxun Chu
- Department of Science and Technology Communication and Policy, University of Science and Technology of China, Hefei, China
| | - Sara Qaisar
- Department of Science and Technology Communication and Policy, University of Science and Technology of China, Hefei, China
| | - Zakir Shah
- College of Media and International Culture, Zhejiang University, Hangzhou, China
| | - Afsheen Jalil
- Department of Technology Management, International Islamic University, Islamabad, Pakistan
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Hassan Z, Jianxun C, Qaisar S, Shah Z, Ram M. Exploring the effect of WeChat on adjustment of international students in China. Cogent Psychology 2021. [DOI: 10.1080/23311908.2021.1908705] [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: 10/21/2022] Open
Affiliation(s)
- Zameer Hassan
- Department of Science and Technology Communication and Policy, School of Humanities and Social Sciences, University of Science and Technology of China, Hefei, China
| | - Chu Jianxun
- Department of Science and Technology Communication and Policy, School of Humanities and Social Sciences, University of Science and Technology of China, Hefei, China
| | - Sara Qaisar
- Department of Science and Technology Communication and Policy, School of Humanities and Social Sciences, University of Science and Technology of China, Hefei, China
| | - Zakir Shah
- Department of Science and Technology Communication and Policy, School of Humanities and Social Sciences, University of Science and Technology of China, Hefei, China
| | - Mitha Ram
- College of Humanities and Development Studies, China Agricultural University, Beijing, Beijing
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Ur Rehman F, Mazhar K, Malik A, Naz SS, Shah KU, Khan A, Khan S, Ahmed R, Qaisar S. Surface modified multifaceted nanocarriers for oral non-conventional cancer therapy; synthesis and evaluation. Mater Sci Eng C Mater Biol Appl 2021; 123:111940. [PMID: 33812575 DOI: 10.1016/j.msec.2021.111940] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 11/20/2020] [Accepted: 02/01/2021] [Indexed: 12/13/2022]
Abstract
Inflammatory cells orchestrate tumor niche for the proliferating neoplastic cells, leading to neoangiogenesis, lymphangiogenesis, tumor growth and metastasis. Emergence of severe side effects, multiple drug resistance and associated high cost has rendered conventional chemotherapy less effectual. The aim was to develop a multipurpose, less toxic, more potent and cheaper, oral non-conventional anticancer therapeutic. Cyclooxygenase associated with tumor niche inflammation and proliferative neoplastic cells were targeted synergistically, through anti-inflammatory and anti-proliferative effects of model drug, diclofenac sodium and fluorescent silver nanoparticles (AgNPs), respectively. Drug entrapped AgNPs were surface modified with PVA (for controlling particle size, preferred cellular uptake, evading opsonization and improved dispersion). XRD, FTIR, DSC, TGA, LIBS, particle size and surface plasmon resonance analysis confirmed the efficient drug encapsulation and PVA coating with 62% loading efficiency. In-vitro, the formulation exhibited 1st order release kinetics with sustained and maximal release at slightly acidic conditions (pH 4.5) enabling the potential for passive tumor targeting. Also, nanoparticles showed efficient protein denaturation inhibition potential, hemo-compatibility (<0.8%) and potent anti-cancer activity (P < 0.05) against breast cancer cell line (MCF-7). In-vivo, developed nanoparticles improved pharmacokinetics (2.8 fold increased AUC, 6.9 h t1/2, Cmax = 1.6 ± 0.03 μg/ml, Kel = 0.1) and pharmacodynamics manifested by potent anti-inflammatory, analgesic and anti-pyretic effects (P < 0.05) at 20 fold lower doses. LD50 determination revealed a wide therapeutic window. The study showed promise of synthesized nanomaterials as cheaper, less toxic, hemo-compatible, oral and more potent anti-inflammatory and non-conventional fluorescent anti-cancer agents, vanquishing tumor niche inflammation and repressing proliferation of malignant cells.
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Affiliation(s)
- Fiza Ur Rehman
- Department of Pharmacy, Quaid-i-Azam University, Islamabad, Pakistan; Nanosciences and Technology Department, National Centre for Physics, Islamabad, Pakistan
| | - Kehkashan Mazhar
- Institute of Biomedical and Genetic Engineering (IBGE), Islamabad, Pakistan
| | - Annum Malik
- Department of Pharmacy, Quaid-i-Azam University, Islamabad, Pakistan; Nanosciences and Technology Department, National Centre for Physics, Islamabad, Pakistan
| | - Syeda Sohaila Naz
- Nanosciences and Technology Department, National Centre for Physics, Islamabad, Pakistan.
| | | | - Adnan Khan
- Department of Pharmacy, Quaid-i-Azam University, Islamabad, Pakistan
| | - Salman Khan
- Department of Pharmacy, Quaid-i-Azam University, Islamabad, Pakistan
| | - Rizwan Ahmed
- National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, 45320, Pakistan
| | - Sara Qaisar
- Nanosciences and Technology Department, National Centre for Physics, Islamabad, Pakistan
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Malik A, Rehman FU, Shah KU, Naz SS, Qaisar S. Hemostatic strategies for uncontrolled bleeding: A comprehensive update. J Biomed Mater Res B Appl Biomater 2021; 109:1465-1477. [PMID: 33511753 DOI: 10.1002/jbm.b.34806] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 12/31/2020] [Accepted: 01/14/2021] [Indexed: 11/10/2022]
Abstract
Uncontrolled bleeding remains the leading cause of morbidity and mortality across the entire macrocosm. It refers to excessive loss of blood that occurs inside of body, due to unsuccessful platelet plug formation at the injury site. It is not only limited to the battlefield, but remains the second leading cause of death amongst the civilians, as a result of traumatic injury. Startlingly, there are no effective treatments currently available, to cater the issue of internal bleeding, even though early intervention is of utmost significance in minimizing the mortality rates associated with it. The fatal issue of uncontrolled bleeding is ineffectively being dealt with the use of pressure dressings, tourniquet, and surgical procedures. This is not a practical approach in combat arenas or in emergency situations, where the traumatic injury inflicted is deep inside the body, and cannot be addressed externally, by the application of topical dressings. This review focuses on the traditional hemostatic agents that are used to augment the process of hemostasis, such as mineral zeolites, chitosan based products, biologically active agents, anti-fibrinolytics, absorbable agents, and albumin and glutaraldehyde, as well as the micro- and nano-based hemostatic agents such as synthocytes, thromboerythrocytes, thrombosomes, and the synthetic platelets.
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Affiliation(s)
- Annum Malik
- Nanosciences and Technology Department, National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan.,Department of Pharmacy, Quaid-i-Azam University, Islamabad, Pakistan
| | - Fiza Ur Rehman
- Nanosciences and Technology Department, National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan.,Department of Pharmacy, Quaid-i-Azam University, Islamabad, Pakistan
| | | | - Syeda Sohaila Naz
- Nanosciences and Technology Department, National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan
| | - Sara Qaisar
- Nanosciences and Technology Department, National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan
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Ashraf S, Siddiqa A, Shahida S, Qaisar S. Erratum to “Titanium-based nanocomposite materials for arsenic removal from water: A review” [Heliyon 5 (5) (May 2019) e01577]. Heliyon 2019; 5:e01889. [DOI: 10.1016/j.heliyon.2019.e01889] [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] [Received: 05/31/2019] [Accepted: 05/31/2019] [Indexed: 11/25/2022] Open
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Sahrash R, Siddiqa A, Razzaq H, Iqbal T, Qaisar S. PVDF based ionogels: applications towards electrochemical devices and membrane separation processes. Heliyon 2018; 4:e00847. [PMID: 30450432 PMCID: PMC6226564 DOI: 10.1016/j.heliyon.2018.e00847] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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: 05/29/2018] [Revised: 09/10/2018] [Accepted: 10/04/2018] [Indexed: 11/28/2022] Open
Abstract
Ionogels have emerged as one of the most interesting and captivating form of composites which credits to the outstanding characteristics. One of the most important constituent of ionogels is ionic liquid, which show many attractive properties notably non-volatility, in-flammability, negligible vapor pressure, tunability, thermal stability and solvating ability. A large variety of matrix materials have been under consideration for ionogels, presently, polymer/ionic liquid based ionogels have attracted much attention. Numerous polymeric materials such as have been utilized for these polymer/ionic liquids based ionogels. Polyvinylidene fluoride (PVDF) has been on top of the line as a matrix material for polymer based ionogels owing to its stability, aging and chemical resistance and mechanical strength. This review is primarily concerned with the properties of polyvinylidene fluoride based ionogels with an emphasis on their applications in various domains electrochemical devices, gas separation and liquid/liquid separations.
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Affiliation(s)
- Rafida Sahrash
- NanoScience and Technology Department, National Centre for Physics, Islamabad, Pakistan.,Department of Physics, University of Gujrat, Gujrat, Pakistan
| | - Asima Siddiqa
- NanoScience and Technology Department, National Centre for Physics, Islamabad, Pakistan
| | - Humaira Razzaq
- NanoScience and Technology Department, National Centre for Physics, Islamabad, Pakistan
| | - Tahir Iqbal
- NanoScience and Technology Department, National Centre for Physics, Islamabad, Pakistan.,Department of Physics, University of Gujrat, Gujrat, Pakistan
| | - Sara Qaisar
- NanoScience and Technology Department, National Centre for Physics, Islamabad, Pakistan
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11
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Naz SS, Shah MR, Islam NU, Khan A, Nazir S, Qaisar S, Alam SS. Synthesis and bioactivities of silver nanoparticles capped with 5-amino-β-resorcylic acid hydrochloride dihydrate. J Nanobiotechnology 2014; 12:34. [PMID: 25201390 PMCID: PMC4422292 DOI: 10.1186/s12951-014-0034-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 08/29/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Conjugated and drug loaded silver nanoparticles are getting an increased attention for various biomedical applications. Nanoconjugates showed significant enhancement in biological activity in comparison to free drug molecules. In this perspective, we report the synthesis of bioactive silver capped with 5-Amino-β-resorcylic acid hydrochloride dihydrate (AR). The in vitro antimicrobial (antibacterial, antifungal), enzyme inhibition (xanthine oxidase, urease, carbonic anhydrase, α-chymotrypsin, cholinesterase) and antioxidant activities of the developed nanostructures was investigated before and after conjugation to silver metal. RESULTS The conjugation of AR to silver was confirmed through FTIR, UV-vis and TEM techniques. The amount of AR conjugated with silver was characterized through UV-vis spectroscopy and found to be 9% by weight. The stability of synthesized nanoconjugates against temperature, high salt concentration and pH was found to be good. Nanoconjugates, showed significant synergic enzyme inhibition effect against xanthine and urease enzymes in comparison to standard drugs, pure ligand and silver. CONCLUSIONS Our synthesized nanoconjugate was found be to efficient selective xanthine and urease inhibitors in comparison to Ag and AR. On a per weight basis, our nanoconjugates required less amount of AR (about 11 times) for inhibition of these enzymes.
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Affiliation(s)
- Syeda Sohaila Naz
- Nanoscience and Catalysis Division, National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, 44000, Pakistan.
| | - Muhammad Raza Shah
- H.E.J. Research Institute of Chemistry, International Centre for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan.
| | - Nazar Ul Islam
- Institute of Chemical Sciences, University of Peshawar, Peshawar, 25120, Pakistan. .,Sarhad University of Science and Information Technology, Peshawar, 2500, Pakistan.
| | - Ajmal Khan
- H.E.J. Research Institute of Chemistry, International Centre for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan.
| | - Samina Nazir
- Nanoscience and Catalysis Division, National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, 44000, Pakistan.
| | - Sara Qaisar
- Nanoscience and Catalysis Division, National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, 44000, Pakistan.
| | - Syed Sartaj Alam
- Department of Plant Pathology, Khyber Pakhtunkhwa Agricultural University Peshawar, Peshawar, Pakistan.
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Sachdeva S, Amin SS, Qaisar S. Type 2 lepra reaction with HIV1 co-infection: a case report with interesting management implications. Indian J Lepr 2011; 83:103-106. [PMID: 21972664] [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: 05/31/2023]
Abstract
A patient co-infected with leprosy and Human Immunodeficiency Virus (HIV)-type 1 who developed type 2 lepra reaction in the absence of antiretroviral therapy is presented. The reaction responded only after initiating anti retroviral therapy (ART) despite normal CD4+ counts. The present report suggests that type 2 reactions in leprosy and HIV co-infected patients may not always be the typical manifestation of immune reconstitution inflammatory syndrome (IRIS) and stresses the importance of considering concomitant HIV infection in refractory lepra reactions. Extensive research is required into the manifestations of HIV in leprosy patients.
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Affiliation(s)
- S Sachdeva
- Department of Dematology, Venereology and Leprology, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh-202 002, India.
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Osman F, Qaisar S, Murray RG. Images in cardiology. Human coronary circulation mimicking reptilian cardiac physiology. Heart 2006; 92:550. [PMID: 16537781 PMCID: PMC1860883 DOI: 10.1136/hrt.2005.075853] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Abstract
The thyroid scintigraphs of 207 patients were examined with a view to investigate the anatomical origin of the pyramidal lobe (PL) and in order to determine the incidence of its scintigraphic detection. The PL was visualized in 41% of the cases studied with a greater incidence among the females as compared to the males. It was established that the likelihood of the PL arising from the isthmus of the thyroid or its lobes was about the same. Further, it was observed that the isthmal PL was usually located in the mid-line rather than laterally, in which case it was more often deviated to the left than to the right. The scintigraphic visualization of the PL was seen to increase with the size of the gland but in large goitres it was difficult to detect. It evolves that although at times, there might be a discrepancy between the apparent and the actual location of the PL due to the presence of overlying tissue, in a majority of cases, the scintigraphic appearances do in fact reflect the true picture.
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Affiliation(s)
- Q H Siraj
- Armed Forces Institute of Pathology, Rawalpindi, Pakistan
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