1
|
Ali Y, Rana MA, Shoaib M. Perturbation Analyses of Three-Dimensional Flow of a Maxwell Fluid with Sinusoidal Injection/Suction. j nanofluids 2018. [DOI: 10.1166/jon.2018.1533] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
2
|
Zahid M, Lodhi MS, Rana MA, Siddiqui AM, Khan MM. Magnetohydrodynamics Flow Analysis of a Linearly Viscous Material Between Porous Planes with Slip Conditions. j nanofluids 2018. [DOI: 10.1166/jon.2018.1535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
3
|
Walait A, Siddiqui AM, Rana MA. Analysis of a self-propelling sheet with heat transfer through non-isothermal fluid in an inclined human cervical canal. J Biol Phys 2018; 44:273-300. [PMID: 29435817 PMCID: PMC6082796 DOI: 10.1007/s10867-018-9481-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 06/14/2017] [Accepted: 01/19/2018] [Indexed: 11/28/2022] Open
Abstract
The present theoretical analysis deals with biomechanics of the self-propulsion of a swimming sheet with heat transfer through non-isothermal fluid filling an inclined human cervical canal. Partial differential equations arising from the mathematical modeling of the proposed model are solved analytically. Flow variables like pressure gradient, propulsive velocity, fluid velocity, time mean flow rate, fluid temperature, and heat-transfer coefficients are analyzed for the pertinent parameters. Striking features of the pumping characteristics are explored. Propulsive velocity of the swimming sheet becomes faster for lower Froude number, higher Reynolds number, and for a vertical channel. Temperature and peak value of the heat-transfer coefficients below the swimming sheet showed an increase by the increment of Brinkmann number, inclination, pressure difference over wavelength, and Reynolds number whereas these quantities decrease with increasing Froude number. Aforesaid parameters have shown opposite effects on the peak value of the heat-transfer coefficients below and above the swimming sheet. Relevance of the current results to the spermatozoa transport with heat transfer through non-isothermal cervical mucus filling an inclined human cervical canal is also explored.
Collapse
Affiliation(s)
- Ahsan Walait
- Department of Mathematics and Statistics, Riphah International University, Islamabad, Pakistan.
| | - A M Siddiqui
- Department of Mathematics, Pennsylvania State University, York Campus, 1031 Edgecomb Avenue, York, PA, 17403, USA
| | - M A Rana
- Department of Mathematics and Statistics, Riphah International University, Islamabad, Pakistan
| |
Collapse
|
4
|
|
5
|
Rana MA, Zahid M, Bhatti S, Siddiqui AM. Theoretical Study of the Blade Coating of Non-Isothermal Viscoplastic Fluids. j nanofluids 2018. [DOI: 10.1166/jon.2018.1422] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
6
|
Rana MA, Siddiqui AM, Bhatti S, Zahid M. The Study of the Blade Coating Process Lubricated with Powell-Eyring Fluid. j nanofluids 2018. [DOI: 10.1166/jon.2018.1419] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
7
|
Rana AQ, Qureshi ARM, Mumtaz A, Abdullah I, Jesudasan A, Hafez KK, Rana MA. Associations of pain and depression with marital status in patients diagnosed with Parkinson's disease. Acta Neurol Scand 2016; 133:276-80. [PMID: 26147247 DOI: 10.1111/ane.12454] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/05/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND Depression and pain are significant clinical problems that are comorbid with Parkinson's disease (PD). However, the relationship of these variables with the marital status of patients with PD has not been explored in previous studies. Therefore, the goal of this study was to assess the possible relationship between depression prevalence, depression severity, and pain interference with the marital status of the sufferers of PD. METHODS This study included 40 patients and 40 healthy control participants who were assessed for depression prevalence and severity using The Hospital Anxiety and Depression Scale (HADS). The same individuals were also assessed for pain interference using the Brief Pain Inventory (BPI). RESULTS When compared to the control groups, the PD (Single) group was found to have the highest prevalence of depression, followed by the PD (Married) group whereas the Control (Single) group was found to have a higher prevalence than the Control (Married) group (P < 0.0001). A main effect was found on depression severity (P < 0.0001), but no significant differences were observed between the PD groups. Lastly, PD (Single) patients had significantly greater pain interference scores than the PD (Married) patients (P < 0.05) with no other significant case-control or control-control group differences. CONCLUSION Patient-spouse relationship, which indicates physical and emotional support may have a mitigating effect on patient outcomes of depression prevalence and pain interference.
Collapse
Affiliation(s)
- A. Q. Rana
- Parkinson's Clinic of Eastern Toronto & Movement Disorders Centre; Toronto ON Canada
| | | | - A. Mumtaz
- University of Toronto at Scarborough; Toronto ON Canada
| | - I. Abdullah
- Parkinson's Clinic of Eastern Toronto & Movement Disorders Centre; Toronto ON Canada
- University of Toronto at Scarborough; Toronto ON Canada
| | - A. Jesudasan
- Faculty of Medicine; University of Ottawa; Ottawa ON Canada
| | - K. K. Hafez
- Department of Family Medicine; University of Calgary; Calgary AB Canada
| | - M. A. Rana
- Faculty of Medicine and Dentistry; James Cook University; Townsville Qld Australia
| |
Collapse
|
8
|
Abstract
The aim of this study is to explain theoretically the role of ciliary motion on the transport of epididymal fluid through the ductus efferentes of the male reproductive track. For this purpose, a mathematical model has been developed for the flow of a non-Newtonian fluid in an axisymmetric tube due to metachronal wave of cilia motion for the more realistic consequences. Carreau viscous fluid model is considered to see the rheological effects on the pumping characteristics of the flow. Regular perturbation method has been employed to obtain the analytical expressions for the stream function, the velocity field and a relation between the pressure difference and the volume flow rate. It is found that the volume flow rate is influenced significantly by Weissenberg number We and the cilia length parameter ε. The computational results are presented graphically to see the effects of various physical parameters. Finally, the analysis is applied and compared with the observed value of the flow rate of spermatic fluid in the ductus efferentes of the male reproductive track. The volume flow rate is reported closed to the estimated value 6 × 10-3 ml/h in the human ductus efferentes when We = 0.5 and ε is near by 0.25.
Collapse
Affiliation(s)
- A. M. Siddiqui
- Department of Mathematics, Pennsylvania State University, York Campus, York PA 17403-3398, USA
| | - A. A. Farooq
- Department of Basic Sciences, Riphah International University, Islamabad 44000, Pakistan
- Department of Mathematics, COMSATS Institute of Information Technology, Tobe Camp, Abbottabad, Pakistan
| | - M. A. Rana
- Department of Basic Sciences, Riphah International University, Islamabad 44000, Pakistan
| |
Collapse
|
9
|
Siddiqui AM, Farooq AA, Rana MA. A mathematical model for the flow of a Casson fluid due to metachronal beating of cilia in a tube. ScientificWorldJournal 2015; 2015:487819. [PMID: 25789334 PMCID: PMC4350871 DOI: 10.1155/2015/487819] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Accepted: 12/14/2014] [Indexed: 11/17/2022] Open
Abstract
A mathematical model is developed to study the transport mechanism of a Casson fluid flow inspired by the metachronal coordination between the beating cilia in a cylindrical tube. A two-dimensional system of nonlinear equations governing the flow problem is formulated by using axisymmetric cylindrical coordinates and then simplified by employing the long wavelength and low Reynolds number assumptions. Exact solutions are derived for the velocity components, the axial pressure gradient, and the stream function. However, the expressions for the pressure rise and the volume flow rate are evaluated numerically. The features of the flow characteristics such as pumping and trapping are illustrated and discussed with the help of graphs. It is observed that the volume flow rate is influenced significantly by the width of plug flow region H p as well as the cilia length parameter ε. The analysis is also applied and compared with the estimated value of the volume flow rate of epididymal fluid in the ductus efferentes of the human male reproductive tract.
Collapse
Affiliation(s)
- A. M. Siddiqui
- Department of Mathematics, Pennsylvania State University, York Campus, York, PA 17403, USA
| | - A. A. Farooq
- Department of Basic Sciences, Riphah International University, Islamabad 44000, Pakistan
- COMSATS Institute of Information Technology, Tobe Camp, Abbottabad 22010, Pakistan
| | - M. A. Rana
- Department of Basic Sciences, Riphah International University, Islamabad 44000, Pakistan
| |
Collapse
|
10
|
Rana MA, Gloviczki P, Oderich GS. Endovascular Stenting With Open Surgery for Reconstructions of the Ascending Aorta and the Aortic Arch: A Review of Indications and Results of Hybrid Techniques. ACTA ACUST UNITED AC 2013; 24:184-92. [DOI: 10.1177/1531003513497984] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
11
|
Motapothula M, Dang ZY, Venkatesan T, Breese MBH, Rana MA, Osman A. Influence of the narrow {111} planes on axial and planar ion channeling. Phys Rev Lett 2012; 108:195502. [PMID: 23003055 DOI: 10.1103/physrevlett.108.195502] [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] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Indexed: 06/01/2023]
Abstract
We report channeling patterns where clearly resolved effects of the narrow {111} planes are observed in axial and planar alignments for 2 MeV protons passing through a 55 nm [001] silicon membrane. At certain axes, such as <213> and <314>, the offset in atomic rows forming the narrow {111} planes results in shielding from the large potential at the wide {111} planes, producing a region of shallow, asymmetric potential from which axial channeling patterns have no plane of symmetry. At small tilts from such axes, different behavior is observed from the wide and narrow {111} planes. At planar alignment, distinctive channeling effects due to the narrow planes are observed. As a consequence of the shallow potential well at the narrow planes, incident protons suffer dechanneled trajectories which are excluded from channeling within the wide planes, resulting in an anomalously large scattered beam at {111} alignment.
Collapse
Affiliation(s)
- M Motapothula
- Center for Ion Beam Applications, Physics Department, National University of Singapore, Lower Kent Ridge Road, Singapore 117542
| | | | | | | | | | | |
Collapse
|
12
|
Ali N, Khan EU, Akhter P, Khattak NU, Khan F, Rana MA. The effect of air mass origin on the ambient concentrations of ⁷Be and ²¹⁰Pb in Islamabad, Pakistan. J Environ Radioact 2011; 102:35-42. [PMID: 20869795 DOI: 10.1016/j.jenvrad.2010.08.010] [Citation(s) in RCA: 4] [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: 10/08/2009] [Revised: 08/18/2010] [Accepted: 08/30/2010] [Indexed: 05/29/2023]
Abstract
Concentration of radionuclides ²¹⁰Pb and ⁷Be, having half lives of 22.3 years and 53.29 days, respectively, in the surface air samples of Islamabad (33.38°N, 73.10°E and Altitude ∼536 m asl.) are measured. The non-destructive technique of gamma-spectrometry, with a high purity germanium HPGe detector, was employed for the analysis of all samples. The annual average concentrations of ²¹⁰Pb and ⁷Be in the surface air samples were determined as 0.284 ± 0.15 and 3.171 ± 1.14 mBq m⁻³, respectively. Our results have shown a seasonal variation of the concentration of ⁷Be in air samples with high values for the spring season. High concentrations for ²¹⁰Pb are obtained when air masses originate from plain areas of Pothohar region, located in the South-West, West and North West of Islamabad. Our values of concentrations show a nice agreement with the relevant reported results.
Collapse
Affiliation(s)
- N Ali
- DPAM, PIEAS, Islamabad, Pakistan.
| | | | | | | | | | | |
Collapse
|
13
|
Breese MBH, Rana MA, Osipowicz T, Teo EJ. Enhanced planar channeling of MeV protons through thin crystals. Phys Rev Lett 2004; 93:105505. [PMID: 15447418 DOI: 10.1103/physrevlett.93.105505] [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] [Subscribe] [Scholar Register] [Received: 03/09/2004] [Indexed: 05/24/2023]
Abstract
At certain tilt alignments between a MeV proton beam and a planar channeling direction, a single interface lattice rotation within a crystal can result in a lower rate of dechanneling than at planar alignment in a perfect crystal. Such planar channeling enhancement arises when the beam passes through a layer thickness which is a half-multiple of the oscillation wavelength and then encounters a small interface rotation which is matched to the beam tilt angle. The beam is projected into the center of the phase space ellipse below the interface, resulting in certain trajectories undergoing a reduction in their transverse energy, in a manner analogous to stochastic cooling or atom laser cooling.
Collapse
Affiliation(s)
- M B H Breese
- Physics Department, National University of Singapore, 10 Lower Kent Ridge Road, Singapore 119260
| | | | | | | |
Collapse
|
14
|
Breese MBH, Teo EJ, Rana MA, Huang L, van Kan JA, Watt F, King PJC. Observation of many coherent oscillations for MeV protons transmitted through stacking faults. Phys Rev Lett 2004; 92:045503. [PMID: 14995385 DOI: 10.1103/physrevlett.92.045503] [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] [Subscribe] [Scholar Register] [Received: 05/07/2003] [Indexed: 05/24/2023]
Abstract
High spatial resolution, high-contrast transmission channeling images of stacking faults in silicon have been produced using a beam of 2 MeV protons focused to a spot size of 60 nm. Over a narrow range of beam tilts to the (011) planes, up to ten periodic intensity oscillations are observed, providing evidence of a long-range coherency of the planar channeled trajectories. This behavior is characterized using Monte Carlo computer simulations, and a phase-space model of planar channeled ion interactions with stacking faults is developed which incorporates all observed channeling and blocking phenomena.
Collapse
Affiliation(s)
- M B H Breese
- Physics Department, National University of Singapore, 10 Lower Kent Ridge Road, Singapore 119260
| | | | | | | | | | | | | |
Collapse
|
15
|
Rana MA, Koenig JL. Observation of spatial inhomogeneities in N-tert-butylbenzothiazolesulfenamide-sulfur cured high-vinyl polybutadiene using NMR imaging. Macromolecules 2002. [DOI: 10.1021/ma00092a008] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
16
|
Rana MA, Koenig JL. Solid State C-13 NMR Studies of Vulcanized Elastomers. XII. Accelerated Sulfur-Vulcanized High-Vinyl Polybutadiene. Rubber Chemistry and Technology 1993. [DOI: 10.5254/1.3538309] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
Solid state 13C NMR measurements were made on accelerated sulfur-vulcanized polybutadiene with a high vinyl content (70%). The systems studied included conventional, semi-efficient and efficient formulated with N-t-butyl benzothiazole sulfenamide (TBHS) as the accelerator. The kinetics of the three vulcanization systems were different, but the final levels of cure were similar. The resonances due to TBBS disappear as the vulcanization proceeds. The ratio of monosulfidic to polysulfidic crosslinks as a function of accelerator to sulfur ratio initially decreases rapidly and then increases in favor of the monosulfidic component. A variety of sulfur-bonded accelerator fragments was found in the system. This reinforces the polar-radical mechanism.
Collapse
Affiliation(s)
- M. A. Rana
- 1Department of Macromolecular Science, Case Western Reserve University, Cleveland, Ohio 44106
| | - J. L. Koenig
- 1Department of Macromolecular Science, Case Western Reserve University, Cleveland, Ohio 44106
| |
Collapse
|
17
|
Gahan PB, Rana MA, Phillips R. Activation of carboxylesterases in root cortical parenchymal cells of Pisum sativum during xylem induction in vitro. Cell Biochem Funct 1983; 1:109-11. [PMID: 6679472 DOI: 10.1002/cbf.290010212] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A quantitative cytochemical study of naphthol AS-D esterase activity in explants from roots of Pisum sativum grown on basal medium for 3 or 6 days showed similar levels of activity to those seen in sections of cortex and stele from intact roots of similar ages. Explants grown in the presence of auxins or cytokinin alone showed a threefold or twofold increase in cortical parenchymal activity, respectively. On adding both hormones to initiate xylem element formation, there was also a threefold increase in activity in the cortex. In all three cases, the stimulated activity was totally inhibited by either 10(-4) M diisopropylfluorophosphate (DFP) or 10(-4) M diethyl p-nitrophenylphosphate (E600), indicating carboxylesterase activity. The low level of activity normally present in cortical cells was inhibitor resistant, so indicating acetylesterase activity. Thus, auxins and cytokinins appear to activate mainly similar carboxylesterases during the initiation of xylem elements from cortical parenchyma cells.
Collapse
|
18
|
Rana MA, Gahan PB. A quantitative cytochemical study of determination for xylem-element formation in response to wounding in roots of Pisum sativum L. Planta 1983; 157:307-316. [PMID: 24264263 DOI: 10.1007/bf00397401] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/1982] [Accepted: 10/20/1982] [Indexed: 06/02/2023]
Abstract
Quantitative cytochemical studies of cortical parenchyma cells of roots of Pisum sativum in which the central vascular bundle is severed, showed esterase activity to be an early marker of the determination of cells to form a vascular bridge. Explantation, onto a basal culture medium, of wound segments taken from roots at different times after severing the stele showed the irreversibility of the esterase activity on removal from the inducing environment, so confirming this as a marker of cell determination. A general determination for the stele was shown to occur by 8-10 h after wounding, but information relating to tracheid secondary-cell-wall formation was not apparently available until 18-20 h after wounding. Determination appeared to occur well before mitosis. The timings of the differentiation steps indicate a simple diffusion model to explain the mechanism of arrival of the initiating molecules.
Collapse
Affiliation(s)
- M A Rana
- Biology Department, Queen Elizabeth College, Campden Hill Road, W8 7AH, London, UK
| | | |
Collapse
|
19
|
Gahan PB, Bellani LM, Rana MA, Lake BD. A quantitative cytochemical method for phosphofructokinase in plant tissues. Histochemistry 1983; 78:399-403. [PMID: 6224762 DOI: 10.1007/bf00496626] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A quantitative cytochemical method for the demonstration of phosphofructokinase has been successfully applied to a range of plant tissues. The findings indicate that this enzyme system may be assayed as an indicator of glycolytic activity in plant cells, and furthermore tha the very high endogenous phosphoenolpyruvate concentrations may not be rate limiting in vivo.
Collapse
|