417 results on '"Imtiaz A. Khan"'
Search Results
2. Functionalized Microbial Consortia with Silver-Doped Hydroxyapatite (Ag@HAp) Nanostructures for Removal of RO84 from Industrial Effluent
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Suriyaprabha Rajendran, Virendra Kumar Yadav, Amel Gacem, Jari S. Algethami, Mohammed S. Alqahtani, Fahad M. Aldakheel, Abdulkarim S. Binshaya, Nahed S. Alharthi, Imtiaz A. Khan, Saiful Islam, Yongtae Ahn, and Byong-Hun Jeon
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microbial consortia ,Ag@HAp nanoparticles ,surface modifications ,industrial effluents ,environmental applications ,Crystallography ,QD901-999 - Abstract
Considering that freshwater is a necessity for human life, sewage treatment has been a serious concern for an increasing number of scientists and academics in recent years. To clean industrial effluents, innovative catalysts with good adsorption, chemical stability, and physicochemical properties have been constructed. Here, a prospective microbial consortium was extracted from the wastewater and used as a low-cost catalyst that was functionalized with silver and silver-doped hydroxyapatite (Ag@HAp) nanostructures made using a sonochemical approach. The structural, optical, and crystal phases of Ag and Ag-doped hydroxyapatite (Ag@HAp) nanostructures were studied using ultraviolet-visible (UV-Vis), Fourier transfer infrared spectroscopy (FTIR), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and high-resolution transmission electron microscopy (HRTEM) techniques. The degradation action of functionalized microbial consortia was examined against reactive orange 84 (RO84) organic discharge. Excellent efficiency for the removal of industrial effluents was found for the Ag NPs and Ag-doped hydroxyapatite (Ag@HAp) loaded with microbial consortia. A maximum of 95% of the decolorization properties of the RO84 dye were obtained in the case of microbial consortia with Ag and Ag@HAp, which was better than the consortia alone (80.32% for 5 ppm and 69.54% for 20 ppm). The consortia/Ag showed 93.34% for 5 ppm and 85.43% for 20 ppm, while was higher for consortia/Ag@HAp (95.34 and 88.43%). The use of these surface-modified nanocatalysts for wastewater treatment and waste effluents discharged from laboratories, the chemical industry, and other sources could be expanded.
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- 2022
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3. Toxoplasma gondii: CD8 T Cells Cry for CD4 Help
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Imtiaz A. Khan, SuJin Hwang, and Magali Moretto
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toxoplasma ,CD8T cells ,CD4T cells ,IL-12 ,IL-21 ,BLIMP-1 ,Microbiology ,QR1-502 - Abstract
Toxoplasma gondii, an apicomplexan parasite, is a pathogenic protozoan that can infect the central nervous system. In pregnant women, infection can result in congenital problems of the fetus, while in immunocompromised individual it can lead to severe neurological consequences. Although CD8 T cells play an important effector role in controlling the chronic infection, their maintenance is dependent on the critical help provided by CD4 T cells. In a recent study, we demonstrated that reactivation of the infection in chronically infected host is a consequence of CD8 T dysfunction caused by CD4 T cell exhaustion. Furthermore, treatment of chronically infected host with antigen-specific non-exhausted CD4 T cells can restore CD8 T cell functionality and prevent reactivation of the latent infection. The exhaustion status of CD4 T cells is mediated by the increased expression of the transcription factor BLIMP-1, and deletion of this molecule led to the restoration of CD4 T cell function, reversal of CD8 exhaustion and prevention of reactivation of the latent infection. In a recent study from our laboratory, we also observed an increased expression of miR146a levels by CD4 T cells from the chronically infected animals. Recent reports have demonstrated that microRNAs (especially miR146a) has a strong impact on the immune system of T. gondii infected host. Whether these molecules have any role in the BLIMP-1 up-regulation and dysfunctionality of these cells needs to be investigated.
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- 2019
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4. Enhanced machining of Al 10%SiCmicro 1%SiCnano hybrid composite using rotary tool rotary workpiece EDM with bio dielectrics and treated tools
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Umair Arif, Imtiaz Ali Khan, and Faisal Hasan
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Rotary tool rotary workpiece EDM ,Annealed cu tool ,Cryogenically treated tool ,Biodiesel ,Distilled water with 10% ethanol ,Carbon footprint ,Medicine ,Science - Abstract
Abstract A sustainable approach was proposed to address environmental pollution, carbon footprint and economic efficiency challenges in Electrical Discharge Machining (EDM). This approach involved the use of Bio-dielectric such as biodiesel and Bio fuel (distilled water with 10% ethanol). The EDM process performance was further optimized by experimenting with both electrodes’ rotation (i.e., in same direction, opposite direction, no rotation) and the use of treated tools (no treatment, heat treatment, cryogenic treatment). Biodiesel as a bio-dielectric showed promise by delivering the highest Material Removal Rate (MRR) and the lowest Tool Wear Rate (TWR). Bio-fuel (distilled water with 10% ethanol) resulted in the lowest Surface Roughness (SR) and cleaner machined surface with least carbon deposition. Additionally, electrode rotation improved flushing and enhanced performance parameters, with opposite direction rotation yielding the highest MRR and the lowest SR. However, no rotation of electrodes resulted in the lowest TWR. The use of treated tools, specifically heat-treated and cryogenically treated tools, also improved performance and reduced energy consumption, with cryogenic treatment providing the highest MRR, heat treatment giving least SR, and no treatment providing least TWR. Certain interactions between factors significantly impacted performance parameters. Grey relational analysis revealed that using distilled water with 10% ethanol as a dielectric, employing cryogenically treated copper tools, and having no rotation of both electrodes yielded the best performance parameters.
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- 2024
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5. Downregulated IL-21 Response and T Follicular Helper Cell Exhaustion Correlate with Compromised CD8 T Cell Immunity during Chronic Toxoplasmosis
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Magali M. Moretto, SuJin Hwang, and Imtiaz A. Khan
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Toxoplasma gondii ,T follicular helper cells ,exhaustion ,IL-21 ,memory CD8 T cells ,latent infection ,Immunologic diseases. Allergy ,RC581-607 - Abstract
CD8 T cells are important for maintaining the chronicity of Toxoplasma gondii infection. In a T. gondii encephalitis susceptible model, we recently demonstrated that CD4 T cells play an essential helper role in the maintenance of the effector response and CD8 T cell dysfunctionality was linked to CD4 T cell exhaustion. However, CD4 T cells are constituted of different subsets with various functions and the population(s) providing help to the CD8 T cells has not yet been determined. In the present study, T follicular helper cells (Tfh), which are known to be essential for B cell maturation and are one of the main sources of IL-21, were significantly increased during chronic toxoplasmosis. However, at week 7 p.i., when CD8 T cells are exhausted, the Tfh population exhibited increased expression of several inhibitory receptors and levels of IL-21 in the serum were decreased. The importance of IL-21 in the maintenance of CD8 T cells function after T. gondii infection was further demonstrated in IL-21R KO mouse model. Interestingly, while CD8 T cells from both knockout (KO) and wild-type mice expressed similar levels of PD-1, animals with defective IL-21 signaling exhibited lower polyfunctionality than wild-type controls. This reduced polyfunctional ability observed in CD8 T cells from KO mice was associated with a significant increase in other inhibitory receptors like Tim-3, LAG-3, and 2B4. Furthermore, the animals exhibited greater signs of Toxoplasma reactivation manifested by the reduced number of cysts and increased expression of tachyzoite (replicative form of the parasite) specific genes (SAG1 and ENO2) in the brain. Also, IL-21R KO mice displayed a higher frequency of tachyzoite-infected monocytes in the blood and spleen. Our findings suggest the importance of Tfh and IL-21 during chronic toxoplasmosis and establish a critical role for this cytokine in regulating CD8 T cell dysfunction by preventing the co-expression of multiple inhibitory receptors during chronic parasitic infection.
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- 2017
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6. Multi-criteria decision making-based optimization of thermal modeling of electric discharge machining
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Umair Arif, Imtiaz Ali Khan, and Faisal Hasan
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Physics ,QC1-999 - Abstract
A thermal model was developed based on finite element modeling analysis using the Transient Thermal module of Ansys. The objective of this study was to develop a thermal model for electrical discharge machining to address the discrepancies observed in the model proposed by Ming et al., which failed to accurately estimate Material Removal Rate (MRR) values for discharge powers exceeding 100 mJ. The MRR ratios derived from the model under consideration were observed to be within the range of 3.568–0.639. In comparison, the MRR ratios obtained from the models proposed by Ming et al. and Joshi et al. were found to be within the range of 3.566–1.186 and 40.433–0.652, respectively. Thus, the thermal model presented in this study demonstrates exceptional precision in predicting the MRR and surface roughness (SR) when compared to previously established models. The optimization of the readings was carried out through the application of Technique for Order of Preference by Similarity to Ideal Solution. The results indicated that an optimized MRR and SR were achieved at a pulse current (I) of 58 amps, pulse on time (Ton) of 420 μs, pulse off time (Toff) of 7.5 μs, and discharge power of 609 mJ.
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- 2024
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7. Issues and challenges of Fischer–Tropsch synthesis catalysts
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Muhammad Amin, Muhammad Usman, Tatinaidu Kella, Wasim Ullah Khan, Imtiaz Afzal Khan, and Kang Hoon Lee
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Fischer–Tropsch synthesis ,catalyst ,syngas ,hydrocarbon production ,liquid fuels ,Chemistry ,QD1-999 - Abstract
Depletion of oil and gas resources is a major concern for researchers and the global community. Researchers are trying to develop a way to overcome these issues using the Fischer–Tropsch synthesis (FTS) process. The FTS reaction converts a mixture of hydrogen and carbon monoxide gases into a liquid fuel. The reactions are performed in the reactor and in the presence of a catalyst. A series of catalysts, such as iron, cobalt, nickel, and ruthenium, have been used for the FTS process. In iron-based catalysts, the Fe5C phase is the active phase that produces C5+ hydrocarbons. At higher conversion rates, the presence of water in the products is a problem for cobalt catalysts because it can trigger catalyst deactivation mechanisms. Ni-based catalysts play key roles as base catalysts, promoters, and photothermal catalysts in FTS reactions to produce different useful hydrocarbons. Ruthenium catalysts offer not only high activity but also selectivity toward long-chain hydrocarbons. Moreover, depending on the Ru particle size and interaction with the oxide support, the catalyst properties can be tuned to enhance the catalytic activity during FTS. The detailed reaction pathways based on catalyst properties are explained in this article. This review article describes the issues and challenges associated with catalysts used for the FTS process.
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- 2024
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8. FACTORS AFFECTING PREVALENCE OF BOVINE TUBERCULOSIS IN NILI RAVI BUFFALOES
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IMTIAZ A. KHAN, A. KHAN1, A. MUBARAK AND S. ALI
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Buffaloes ,bovine tuberculosis ,prevalence ,milk yield ,old age ,mycobacteriology ,Animal culture ,SF1-1100 ,Veterinary medicine ,SF600-1100 - Abstract
A study was conducted to find out the prevalence of bovine tuberculosis (BTB) in Nili Ravi buffaloes at a livestock experimental station in the Punjab, Pakistan. On the basis of the comparative intradermal tuberculin test (CIDT), prevalence of BTB was found to be 10.06%. Epidemiological factors including old age, high milk production and parity played a significant role in the prevalence of the disease. Significantly (P7 litres per day (75.00%). A total of nine out of 16 (56.25%) animals were found positive by mycobacteriological studies. Mycobacterium bovis was isolated from four (44.44%) milk samples, M. tuberculosis from one faecal and two milk samples (33.33%), while atypical mycobacteria were isolated from two (22.22%) milk samples. It can be concluded from the present study that BTB is present in indigenous buffaloes; old age and high milk yield greatly influence its prevalence. M. bovis was the principal cause of tuberculosis in buffaloes. Furthermore, atypical mycobacteria also contribute to BTB to a considerable proportion.
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- 2008
9. Predictive modelling and identification of key risk factors for stroke using machine learning
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Ahmad Hassan, Saima Gulzar Ahmad, Ehsan Ullah Munir, Imtiaz Ali Khan, and Naeem Ramzan
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Medicine ,Science - Abstract
Abstract Strokes are a leading global cause of mortality, underscoring the need for early detection and prevention strategies. However, addressing hidden risk factors and achieving accurate prediction become particularly challenging in the presence of imbalanced and missing data. This study encompasses three imputation techniques to deal with missing data. To tackle data imbalance, it employs the synthetic minority oversampling technique (SMOTE). The study initiates with a baseline model and subsequently employs an extensive range of advanced models. This study thoroughly evaluates the performance of these models by employing k-fold cross-validation on various imbalanced and balanced datasets. The findings reveal that age, body mass index (BMI), average glucose level, heart disease, hypertension, and marital status are the most influential features in predicting strokes. Furthermore, a Dense Stacking Ensemble (DSE) model is built upon previous advanced models after fine-tuning, with the best-performing model as a meta-classifier. The DSE model demonstrated over 96% accuracy across diverse datasets, with an AUC score of 83.94% on imbalanced imputed dataset and 98.92% on balanced one. This research underscores the remarkable performance of the DSE model, compared to the previous research on the same dataset. It highlights the model's potential for early stroke detection to improve patient outcomes.
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- 2024
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10. Finite element analysis of wire EDM process parameters on performance characteristics of Al–SiC hybrid composite with micro and nano reinforcements
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Mahamood Ansari, Imtiaz Ali Khan, and Umair Arif
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Microchannel ,Aluminium hybrid composite (AHC) ,WEDM ,FEM ,Gaussian heat flux ,Technology - Abstract
Aluminum Hybrid Composites (AHC) microchannels find extensive applications in aerospace, refrigeration and air conditioning (RAC), microelectronics, automotive, biomedical, and marine industries due to their improved mechanical properties. The combination of lower density, high hardness, elevated thermal and electrical conductivity, superior elasticity, and heightened oxidizing ability at low temperatures makes machining aluminum hybrid composites challenging through orthogonal methods in an open environment. Therefore, it is imperative to investigate the impact of various machining conditions to determine optimal parameter values for microchannel fabrication in aluminum hybrid composite materials. This study aims to identify the ideal machining parameters for Al–SiC micro-SiC nano hybrid composites using wire electrical discharge machining. Four distinct process parameters (pulse on time, gap voltage, wire tension, and wire feed rate) and two response parameters (material removal rate (MRR) and surface roughness (SR)) were considered for process optimization. Additionally, finite element modeling was conducted for the aforementioned process, and the results were compared with experimental outcomes. Single-variable optimization yielded maximum MRR at 125 tons (μs), 25 SV (volt), 12 WT (kgf), and 2 WFR (m/min), and minimum SR at 125 tons (μs), 10 SV (volt), 12 WT (kgf), and 4 WFR (m/min). Single-variable optimization for simulations resulted in maximum MRR at 125 tons (μs), 40 SV (volt), 4 WT (kgf), and 6 WFR (m/min), and minimum SR at 110 tons (μs), 10 SV (volt), 12 WT (kgf), and 2 WFR (m/min). Precise modeling aids in minimizing unnecessary machining, enabling exploration of a broader range of experimental results, thereby promoting environmentally friendly and sustainable machining practices.
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- 2024
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11. Optimizing the fluoride removal from drinking water through adsorption with mesoporous magnetic calcite nanocomposites
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Amna Sarwar, Jin Wang, Nadia Riaz, Muhammad Saqib Khan, Bibi Saima Zeb, Imtiaz Ali Khan, Muhammad Akmal, Asaad Khalid, Ajmal Khan, Ahmed Al-Harrasi, and Qaisar Mahmood
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Magnetic nanoparticles ,Fluoride ,Calcite nanocomposites ,Response surface methodology ,Groundwater contamination ,Batch adsorption ,Technology - Abstract
Fluoride (F−) contamination in groundwater is a global concern arising from natural processes and human activities. This study investigates the adsorption of F− using surface-activated magnetic calcite nanocomposites (NCs) synthesized via co-precipitation assisted wet-impregnation (CP-WI). Various Fe3O4 loadings and calcination temperatures (300 °C and 500 °C) were explored to optimize synthesis parameters. Batch adsorption experiments were conducted to assess the performance of synthesized nanoparticles (NPs) and nanocomposites (NCs). BET, FTIR spectroscopy, X-ray diffraction, and SEM characterization techniques were employed to analyze the physicochemical properties, including surface functional groups, crystallite size, and morphology. The adsorption process was investigated using RSM statistical design with adsorbent dose (A) and F− concentration (B) as independent variables. 0.5Fe-C-NC-5, calcined at 500 °C, exhibited superior adsorption capacity (7.81 mg/g) compared to Fe3O4 and calcite NPs (6.57 mg/g and 6.81 mg/g, respectively). Maximum F− adsorption occurred within 10 min of contact time. NPs and NCs that were exposed to higher calcination temperatures, reaching up to 500 °C, showed an increase in crystallite development while experiencing a reduction in surface area and an enlargement of pore size compared to those treated at lower temperatures. The BET analysis revealed a narrow, slit-like mix of microporous and mesoporous surface with a type IV isotherm and H3 hysteresis loop, indicating multilayer adsorption followed by capillary condensation. The SEM images displayed columnar shapes of CaCO3 polymorph in the prepared Fe3O4-calcite NP and Fe–C NP, which can be attributed to lower calcination or synthesis temperatures.
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- 2024
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12. Evaluating the Efficacy of Plant Extracts in Managing the Bruchid Beetle, Callosobruchus maculatus (Coleoptera: Bruchidae)
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Rasheed Akbar, Brekhna Faheem, Tariq Aziz, Amjad Ali, Asmat Ullah, Imtiaz Ali Khan, and Jianfan Sun
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bruchid beetle ,integrated pest management ,repellency and toxicity ,Science - Abstract
An estimated 2000 plant species have been employed for pest control worldwide. The use of these botanical derivatives is thought to be one of the most cost-effective and sustainable options for pest management in stored grain. The present study was designed to assess the efficacy of five plant extracts viz; Nicotiana tabacum L., Nicotiana rustica L., Azadirachta indica A. Juss., Thuja orientalis L., and Melia azedarach L. against Callosobruchus maculatus L. Plant species extracts were applied at six different concentrations, i.e., 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0% in four replications. The phytochemical analyses of ethanolic extracts of five plant species showed variable amounts of phytochemicals i.e., alkaloids, flavonoids, saponins, diterpenes, phytosterol, and phenols. Total phenolic and flavonoid compounds were also observed. The efficacy of A. indica was highest, characterized by the lowest infestation rate (16.65%), host seed weight loss (7.85%), mean oviposition (84.54), and adult emergence (58.40%). In contrast, T. orientalis was found to be the least effective against C. maculatus, with the highest infestation rate of 25.60%, host seed weight loss of 26.73%, mean oviposition of 117.17, and adult emergence rate of 82.01%. Probit analysis was performed by estimating LC50 and LC90. The toxicity percentages of N. tabacum (LC50 = 0.69%, LC90 = 14.59%), N. rustica (LC50 = 0.98%, LC90 = 22.06%), and A. indica (LC50 = 1.09%, LC90 = 68.52%) were notable in terms of the lower LC50 and LC90 values after the 96-h exposure period against C. maculatus. Repellency was assessed by using the area preference and filter paper method. The repellency of C. maculatus on plant extracts increased with the increasing dose and time, such that it was the highest after 48 h. Likewise, at a 3% concentration, A. indica demonstrated 100.00% (Class-V) repellency followed by N. tabacum (96.00%, Class-V), N. rustica (74%, Class-IV), M. azedarach (70.00%, Class-IV), and T. orientalis (68.00%, Class-IV). Based on the findings of this study, we recommend integrating N. rustica, N. tabacum, A. indica, and M. azedarach for effective management of C. maculatus and highlight the potential of these plant species in the formulation of new biocidal agents.
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- 2024
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13. CD8 T Cells and Toxoplasma gondii: A New Paradigm
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Jason P. Gigley, Rajarshi Bhadra, and Imtiaz A. Khan
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Infectious and parasitic diseases ,RC109-216 - Abstract
CD8 T cells are essential for control of Toxoplasma gondii infection. Once activated they undergo differentiation into short-lived effector and memory precursor effector cells. As effector cells, CD8 T cells exert immune pressure on the parasite via production of inflammatory cytokines and through their cytolytic activity. Once immune control has been established, the parasite encysts and develops into chronic infection regulated by the memory CD8 T-cell population. Several signals are needed for this process to be initiated and for development of fully differentiated memory CD8 T cells. With newly developed tools including CD8 T-cell tetramers and TCR transgenic mice, dissecting the biology behind T. gondii-specific CD8 T-cell responses can now be more effectively addressed. In this paper, we discuss what is known about the signals required for effective T. gondii-specific CD8 T-cell development, their differentiation, and effector function.
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- 2011
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14. Cutting-Edge Perovskite-Based Flexible Pressure Sensors Made Possible by Piezoelectric Innovation
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Adeela Naz, Yuan Meng, Jingjing Luo, Imtiaz Ahmad Khan, Rimsha Abbas, Suzhu Yu, and Jun Wei
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perovskite ,sensing mechanism ,flexible pressure sensor ,piezoelectric properties ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
In the area of flexible electronics, pressure sensors are a widely utilized variety of flexible electronics that are both indispensable and prevalent. The importance of pressure sensors in various fields is currently increasing, leading to the exploration of materials with unique structural and piezoelectric properties. Perovskite-based materials are ideal for use as flexible pressure sensors (FPSs) due to their flexibility, chemical composition, strain tolerance, high piezoelectric and piezoresistive properties, and potential integration with other technologies. This article presents a comprehensive study of perovskite-based materials used in FPSs and discusses their components, performance, and applications in detecting human movement, electronic skin, and wireless monitoring. This work also discusses challenges like material instability, durability, and toxicity, the limited widespread application due to environmental factors and toxicity concerns, and complex fabrication and future directions for perovskite-based FPSs, providing valuable insights for researchers in structural health monitoring, physical health monitoring, and industrial applications.
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- 2024
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15. Silver Nanoparticles: Synthesis, Structure, Properties and Applications
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Rimsha Abbas, Jingjing Luo, Xue Qi, Adeela Naz, Imtiaz Ahmad Khan, Haipeng Liu, Suzhu Yu, and Jun Wei
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silver nanoparticles ,synthesis ,Ag NP’s structure ,properties ,NP applications ,Chemistry ,QD1-999 - Abstract
Silver nanoparticles (Ag NPs) have accumulated significant interest due to their exceptional physicochemical properties and remarkable applications in biomedicine, electronics, and catalysis sensing. This comprehensive review provides an in-depth study of synthetic approaches such as biological synthesis, chemical synthesis, and physical synthesis with a detailed overview of their sub-methodologies, highlighting advantages and disadvantages. Additionally, structural properties affected by synthesis methods are discussed in detail by examining the dimensions and surface morphology. The review explores the distinctive properties of Ag NPs, including optical, electrical, catalytic, and antimicrobial properties, which render them beneficial for a range of applications. Furthermore, this review describes the diverse applications in several fields, such as medicine, environmental science, electronics, and optoelectronics. However, with numerous applications, several kinds of issues still exist. Future attempts need to address difficulties regarding synthetic techniques, environmental friendliness, and affordability. In order to ensure the secure utilization of Ag NPs, it is necessary to establish sustainability in synthetic techniques and eco-friendly production methods. This review aims to give a comprehensive overview of the synthesis, structural analysis, properties, and multifaceted applications of Ag NPs.
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- 2024
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16. Liver-boosting potential: chicory compound-mediated silver nanoparticles for hepatoprotection—biochemical and histopathological insights
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Ayesha Siddiqa, Rahmatullah Qureshi, Naveed Iqbal Raja, Imtiaz Ahmed Khan, Muhammad Zishan Ahmad, Shaista Rafique, Amir Ali, Ajaz Ahmad, and Prashant Kaushik
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silver nanoparticles ,hepato-protective activity ,liver diseases ,chicory compound ,histopathology ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Background: Liver disease is a serious health concern in today’s world, posing a challenge to both healthcare providers and pharmaceutical companies. Most synthetic drugs and chemicals cause liver damage accounting for approximately 10% of acute hepatitis and 50% of acute liver failure.Purpose: The present study aimed to evaluate the hepato-protective activity of an extract of chicory formulation assisted by silver nanoparticles against carbon tetra chloride (CCl4)-induced hepatic damage in rat’s liver.Methods: Rats of the Wistar strain (Rattus norvegicus) were used to test the in vivo hepato-protective efficacy at various doses. Rats were randomly divided into nine groups, each containing six rats. The groups were as follows: first group (control), second group (CCl4), third group, silymarin (20 mg/kg of body weight), fourth group (CCl4+chicory) (1.75 mg/kg of b. wt), fifth group (CCl4 + chicory at the dose of 2.35 mg/kg), sixth group (CCl4 + chicory of 3.25 mg/kg), seventh group (CCl4 +AgNPs 1.75 mg/kg of b. wt.), eighth group (CCl4 + AgNPs 2.35 mg/kg of body weight), and ninth group (CCl4 + AgNPs 3.25 mg/kg of b. wt.). Blood samples were taken 24 h after the last administration (i.e., 30th day). The blood samples were analyzed for different serum enzymes such as ALP (alkaline phosphatase), ALT (alanine transaminase), bilirubin (Blr), triglyceride, and cholesterol. Histology liver sections were performed.Results: Treatment with AgNPs and chicory extract showed significant hepato-protective activity in a dose-dependent manner. In three doses, the chicory extract at a rate of 3.25 mg/kg of body weight significantly reduced elevated levels of biochemical markers in comparison to CCl4-intoxicated rats. Histology of the liver sections from CCl4-treated rats revealed inflammation of hepatocytes, necrosis, cytoplasmic degeneration, vacuolization, and a deformed central vein. The chicory formulation extract exhibited a remarkable recovery percentage in the liver architecture that was higher than the drug (i.e., silymarin). While treatment with AgNPs also repaired the degenerative changes and restored the normal form of the liver, chicory formulation extract possessed more hepato-protective potential as compared to AgNPs by regulating biochemical and histo-pathological parameters.Conclusion: This study can be used as confirmation of the hepato-protective potential of chicory compounds for possible use in the development programs of drugs to treat liver diseases.
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- 2024
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17. Echocardiography as a Screening Modality for Portopulmonary Hypertension in Patients with Cirrhosis and Chronic Viral Hepatitis
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Shahzad Ashraf, Imtiaz Ahmed Khan, and Waheed ur Rehman Khan
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Chronic viral hepatitis ,Cirrhosis ,echocardiography ,Porto pulmonary hypertension ,Right ventricle tricuspid annular plane systolic excursion ,Medicine ,Medicine (General) ,R5-920 - Abstract
Objective: To assess porto pulmonary hypertension by echocardiography in patients with cirrhosis and chronic viral hepatitis. Study Design: Comparative cross-sectional study. Place and Duration of Study: Gastroenterology and Cardiology Departments Combined Military Hospital, Multan Pakistan, from Mar to Dec 2020. Methodology: Fifty patients with cirrhosis due to chronic hepatitis C, B/D, with Child-Turcotte-Pugh score>6, Model for End Stage Liver Disease–Sodium score>9, were compared to a Control-Group of 50 patients with chronic liver disease due to chronic hepatitis C, B/D; for the frequency of portopulmonary hypertension in the former group. In addition to pulmonary artery pressures, tricuspid regurgitation, right ventricle to left ventricle base ratio, and right ventricle tricuspid annular plane systolic excursion were also assessed. Results: Four patients (8%) with cirrhosis (irrespective of severity) had porto pulmonay hypertension, and none in the Control-Group. The median pulmonary artery pressure in the Patient-Group was 20 mmHg (15-46), and in the Control-Group was 17 mm Hg (15-20). The Child Turcotte Pugh, Model for End Stage Liver Disease–Sodium parameters, pulmonary artery pressure and tricuspid annular plane systolic excursion were deranged in the Patient-Group and showed statistical significance. The area under the ROC curve for pulmonary artery pressure in the Patient-Group was 0.803. Conclusion: In patients with cirrhosis, 8% had portopulmonary hypertension. Echocardiography is an important screening method for the assessment of portopulmonary hypertension in this patient population.
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- 2023
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18. Preventing Spoliation of Evidence with Blockchain: A Perspective from South Asia.
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Ali Shahaab, Chaminda Hewage, and Imtiaz A. Khan
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- 2021
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19. A Hybrid Blockchain Implementation to Ensure Data Integrity and Interoperability for Public Service Organisations.
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Ali Shahaab, Imtiaz A. Khan, Ross Maude, and Chaminda Hewage
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- 2021
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20. Application of Near-Infra-Red Spectroscopy for the Analysis of the Impact of Black Color on Neural Response.
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Ahsan Abdullah 0002 and Imtiaz Hussain Khan
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- 2018
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21. Predicting Obesity Using Longitudinal Near Infra-Red Spectroscopy (NIRS) Data.
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Ahsan Abdullah 0002, Amir Hussain 0001, and Imtiaz Hussain Khan
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- 2017
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22. A Lower Dose of Infection Generates a Better Long-Term Immune Response againstToxoplasma gondii
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Magali M. Moretto, Jie Chen, Morgan Meador, Jasmine Phan, and Imtiaz A. Khan
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Immunology ,Immunology and Allergy ,General Medicine - Abstract
Toxoplasma gondii, an obligate intracellular pathogen, induces a strong immune response in the infected host. In the encephalitis model of infection, long-term protective immunity is mediated by CD8 T cells, with the CD4 T cell population providing important help. Most of the immune studies have used a 10- to 20-cyst dose of T. gondii, which leads to T cell dysfunctionality during the late phase of chronic infection and increases the chances of reactivation. In the current study, we compared the immune response of mice orally infected with either 2 or 10 cysts of T. gondii. During the acute phase, we demonstrate that the lower dose of infection generates a reduced number of CD4 and CD8 T cells, but the frequency of functional CD4 or CD8 T cells is similar in animals infected with two different doses. However, Ag-experienced T cells (both CD4 and CD8) are better maintained in lower dose–infected mice at 8 wk postinfection, with an increase number functional cells that exhibit lower multiple inhibitory receptor expression. In addition to better long-term T cell immunity, animals infected with a lower dose display reduced inflammation manifested by lesser Ag-specific T cell and cytokine responses during the very early stage of the acute infection. Our studies suggest a previously unappreciated role of dose-dependent early programming/imprinting of the long-term CD4/CD8 T cell response during T. gondii infection. These observations point to the need for an in-depth analysis of how early events shape long-term immunity against this pathogen.
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- 2023
23. Biophysical Management of Aphid (Schizaphis graminum Rondani) (Hemiptera: Aphididae) in Wheat Crop
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Muhammad Waqas Ul Hassan, Muhammad Nadeem, Hafeez Ur Rehman, Jamshaid Iqbal, Muhammad Shakeel Hanif, Amer Rasool, Imtiaz Akram Khan Niazi, Muhammad Aslam, Abdul Ghaffar, Sikandar Hayat, Aftab Ahmad Khan, and Ehsan Ul Haque
- Subjects
Geography, Planning and Development ,Management, Monitoring, Policy and Law - Abstract
Aphid is a major pest of wheat that causes substantial agricultural damages to wheat crop annually. In the present study, experiments on ecofriendly management of this pest were conducted at the experimental area of Arid Zone Research Institute (AZRI), Bhakkar. The trials were laid down in Randomized Complete Block Design (RCBD) with three replications. Data was collected at seven days interval by counting method. As far as efficiency of yellow sticky traps is concerned, the plot having 4-traps captured maximum (848.07) aphids. As a result, minimum (11.16 aphid tiller-1) were observed in the respective plot. The same plot exhibited maximum population reduction (71.93%) and grain yield (6617.9 kg ha-1). The plot having 1-trap captured minimum (257.33) aphids. Consequently, maximum (33.37 aphids/tiller) were found in the field. The same treatment showed minimum population reduction (23.99%) and grain yield (5489.1 kg ha-1). Chrysoperla carnea was found a voracious predator of the pest. The plot having 4-egg cards of this predator showed minimum (7.69 aphids tiller-1) with maximum (49.50%) population reduction of the aphid followed by 8.78 aphids/tiller in the plot having 3-egg cards with 42.56% population reduction. Lowest population reduction (12.33%) was found in the plot having 1 egg card.
- Published
- 2023
24. Morphological and Ecological Correlates of Anuran Tadpoles in Scrub and Subtropical Pine Forests
- Author
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Sidra Ikram, Muhammad Rais, Sumbul Gill, Waseem Ahmad, Muhammad Saeed, Ayesha Akram, Imtiaz Ahmed Khan, and Muhammad Atique Akhter
- Subjects
Animal Science and Zoology ,Ecology, Evolution, Behavior and Systematics - Abstract
We recorded tadpoles of eight anuran species from subtropical scrub and pine forests (District Rawalpindi and Islamabad Capital Territory, Pakistan). These include Duttaphrynus melanostictus, Duttaphrynus stomaticus, Microhyla nilphamariensis, Euphlyctis spp., Minervarya spp., Allopaa hazarensis, Nanorana vicina, and Hoplobatrachus tigerinus. Our results showed that the forest type featuring scrub vegetation, low elevation and warmer climate (day air temperature 30°C, day water temperature 28°C) had more species richness (six of the eight recorded species) while the subtropical pine forest featuring relatively low air (16°C) and water (14°C) temperatures and higher elevation had relatively higher anuran endemism. The Indus Valley Toad is an abundant species throughout scrub forest. Changes in climate resulting in increased temperatures in pine forests could negatively impact endemic species by encouraging the spread of species adapted for warmer temperatures.
- Published
- 2022
25. BARKAT: A NEW HIGH FODDER YIELDING OAT (AVENA SATIVA L.) VARIETY WITH BETTER NUTRITIONAL VALUE
- Author
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Niazi, Imtiaz Akram Khan, primary, Aslam, Muhammad, additional, Nadeem, Muhammad, additional, Hanif, Muhammad Shakeel, additional, Hayat, Sikandar, additional, Ahmed, Raees, additional, Jamil, Muhammad, additional, Basit, Abdul, additional, Hussain, Ahmad, additional, Raza, Ahmad, additional, Ahmad, Ghulam, additional, Khan, Aftab Ahamd, additional, Kalyar, Muhammad Tanveer Ahmad, additional, and Raza, Suleman, additional
- Published
- 2023
- Full Text
- View/download PDF
26. Forages: Ecology, Breeding Objectives and Procedures
- Author
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Rauf, Saeed, Sienkiewicz-Paderewska, Dorota, Malinowski, Dariusz P., Hussain, M. Mubashar, Niazi, Imtiaz Akram Khan, Kausar, Maria, Al-Khayri, Jameel M., editor, Jain, Shri Mohan, editor, and Johnson, Dennis V., editor
- Published
- 2016
- Full Text
- View/download PDF
27. Recent Developments and Anticancer Therapeutics of Paclitaxel: An Update
- Author
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Muthu Thiruvengadam, Anees Ahmed Khalil, Abdur Rauf, Fahad A. Alhumaydhi, Abdullah S.M. Aljohani, Muhammad Sameem Javed, Muhammad Arslan Khan, Imtiaz Ali Khan, Mohamed A. El-Esawi, Sami Bawazeer, Abdelhakim Bouyahya, Maksim Rebezov, and Mohammad Ali Shariati
- Subjects
Pharmacology ,Drug Discovery - Abstract
Abstract: Plants are a source of diverse classes of secondary metabolites with anticancer properties. Paclitaxel (Taxol) is an anticancer drug isolated from various Taxus species and is used as a chemotherapeutic agent against various cancers. The biosynthesis of paclitaxel is a complex pathway, making its total chemical synthesis commercially non-viable; hence, alternative novel sources - like plant cell culture and heterologous expression systems, are being investigated to overcome this issue. Advancements in the field of genetic engineering, microbial fermentation engineering, and recombinant techniques have significantly increased the achievable yields of paclitaxel. Indeed, paclitaxel selectively targets microtubules and causes cell cycle arrest in the G2/M phase, inducing a cytotoxic effect in a concentration and time-dependent manner. Innovative drug delivery formulations, like the development of albumin-bound nanoparticles, nano-emulsions, nano-suspensions, liposomes, and polymeric micelles, have been applied to enhance the delivery of paclitaxel to tumor cells. This review focuses on the production, biosynthesis, mechanism of action, and anticancer effects of paclitaxel.
- Published
- 2022
28. Seroprevalence of Anti-tTg-IgA among Symptomized Celiac Disease Patients and Their Correlation with Rotavirus Infection
- Author
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Asma Sadiq, Jadoon Khan, Irfan Ullah, Nosheen Basharat, Sajid Ali, Ahmad Ud Din, Ijaz Ali, Arshad Farid, Muddaser Shah, Mohamed M. Abdel-Daim, Ghadeer M. Albadrani, and Imtiaz Ali Khan
- Subjects
Transglutaminases ,Adolescent ,Glutens ,Article Subject ,General Immunology and Microbiology ,Enzyme-Linked Immunosorbent Assay ,General Medicine ,Rotavirus Infections ,General Biochemistry, Genetics and Molecular Biology ,Immunoglobulin A ,Celiac Disease ,Cross-Sectional Studies ,Seroepidemiologic Studies ,Child, Preschool ,Humans ,Child ,Autoantibodies - Abstract
Celiac disease (CD) is a chronic inflammatory disorder in the intestinal tract as a response to the use of gluten in genetically predisposed individuals. It is a worldwide problem, with a high prevalence rate in North America. This is a descriptive cross-sectional study involving 1090 samples collected from different hospitals of Rawalpindi and Islamabad, Pakistan, from January 2019 to December 2019. In this study, 1090 blood samples screened for seroprevalence of anti-tTG antibodies in CD symptomatic patients via ELISA (enzyme-linked immunosorbent assay). 1090 fecal samples from the same CD patients were collected and tested for the presence of rotavirus (RV) via ELISA and RT-PCR. Of the 1090 patients tested for seroprevalence of anti-tTG antibodies, 112/1090 (10.3%) were found to be positive. Of the 112 anti-tTG-positive patients, 78/112 (70%) were positive for RV via ELISA and 74/112 (66.1%) were RV positive via RT-PCR. A statistically significant association was reported between rotavirus infection and celiac disease ( p ˂ 0.05 ). Anti-tTG antibodies were higher in age group 6 (12-18 years) patients (18.4%) and at minimum in age group 3 (1-3 years) patients (4.8%). However, there was a statistically insignificant relationship between group age and CD prevalence ( p > 0.05 ). The highest CD prevalence was noted during winter season (19.6%) and the lowest (3.0%) during fall/autumn. Our study findings demonstrate that Pakistan has a high prevalence of CD compared to other studies. Further studies in the fields of environmental risk factors and treatment with more advanced serological and histopathological studies are needed in the future.
- Published
- 2022
29. Microplastics as vectors of environmental contaminants: Interactions in the natural ecosystems
- Author
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Rashid Iqbal, Muhammad Tahir Khan, Hazrat Bilal, Muhammad Mahran Aslam, Imtiaz Ahmed Khan, Shameem Raja, Muhammad Arslan, and Phuong Minh Nguyen
- Subjects
Health, Toxicology and Mutagenesis ,Ecological Modeling ,Pollution - Published
- 2022
30. Green and sustainable electric discharge machining: a review
- Author
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Umair Arif, Imtiaz Ali Khan, and Faisal Hasan
- Subjects
Mechanics of Materials ,General Materials Science ,Industrial and Manufacturing Engineering - Published
- 2022
31. Biorational Control of Callosobruchus maculatus (Coleoptera: Buchidae) in Stored Grains with Botanical Extracts
- Author
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Rasheed Akbar, Imtiaz Ali Khan, Brekhna Faheem, Rashid Azad, Maid Zaman, Rubab Altaf, Amjad Usman, Muhammad Fawad, Abid Farid, Ahmad Ur Rahman Saljoqi, Asad Syed, Ali H. Bahkali, Abdallah M. Elgorban, Jawad Ali Shah, and Abdul Qayyum
- Subjects
Article Subject ,General Immunology and Microbiology ,General Medicine ,General Biochemistry, Genetics and Molecular Biology - Abstract
Globally, around 2000 plant species are used against pest control. The utilization of botanicals is considered the most economic and biodegradable methods for the control of stored grains pests. Therefore, the current study was carried out to investigate the repellency potential of five botanicals against Callosbruchus maculatus F. in Haripur, Pakistan. The concentrations of Azadirachta indica L., Nicotiana tabacum L., Melia azedarach L., Nicotiana rustica L., and Thuja orientalis L. were, i.e., 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0% in four replicates to establish contact effects. The data were recorded after 1, 2, 3, 6, 24, 48, 72, and 96 hours. The repellency effect of these plant species against C. maculatus were increased in both the time- and dose-dependent manner, and highest effect was observed at 72 h. In addition, the repellency effect was 91% for A. indica (class: V), 86% M. azedarach, 82%, N. tabacum (class: V), 79% N. rustica (class: IV), and 75% T. orientalis (class: IV) at 3% concentration against C. maculatus. Furthermore, following 96 hours’ exposure to treatment the sensitivity response of insects decreases as the time interval increases, i.e., 86% A. indica (class: V) was followed by 71% M. azedarach (class: IV), 65% N. tabacum (class: IV), 61% N. rustica (class: IV), and T. orientalis 57% (class: III) repellency at highest concentration of 3%. The current study concluded that A. indica and M. azedarach can be incorporated for the management of C. maculatus and these plant species might be helpful in the productions of new biopesticides.
- Published
- 2022
32. Fatty Acids and Elements Profile of Different Parts from Congress grass (Parthenium hysterophorus L.)
- Author
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Ghazala Begum, Ghulam Dastagir, Abdur Rauf, Sami Bawazeer, Saima Naz, Prabhakar Semwal, Imtiaz Ali Khan, Yahya S. Al-Awthan, Omar Bahattab, Mohammed A. Al-Duais, and Mohamed Fawzy Ramadan
- Subjects
Applied Microbiology and Biotechnology ,Microbiology ,Biotechnology - Abstract
Congress grass (Parthenium hysterophorus L., family Asteraceae) is found generally in agricultural and vacant lands across the globe. This study investigated the fatty acids and elemental profiles of different parts including roots, stem and leaves of P. hysterophorus in the response to seasonal variation. The elemental analysis and fatty acid were determined in both the winter and summer seasons. The root, stem, and leaves powder were subjected to extraction with acetone, water, chloroform, diethyl ether, ethanol, methanol, and n-hexane to measure the extractive values. Among all the plant parts, leaves recorded the highest extractive value of 29%, and 28% with acetone and diethyl ether, respectively, while the root recorded the lowest (10.3%) extractive value with chloroform. Higher concentrations of saturated and unsaturated fatty acids were detected in all the plant parts in the winter collection than in the summer season. Parthenium hysterophorus is multi medicinal applications such as used for rheumatic pain, urinary tract infections, inflammation, diarrhea, neuralgia, and malaria. The study highlights the importance of collection time (seasons) of different parts of P. hysterophorus for the maximum extraction of both elements and fatty acids either saturated or unsaturated from the pharmacogenetic point of view.
- Published
- 2022
33. Development, Molecular Docking, and In Silico ADME Evaluation of Selective ALR2 Inhibitors for the Treatment of Diabetic Complications via Suppression of the Polyol Pathway
- Author
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Aqeel Imran, Muhammad Tariq Shehzad, Syed Jawad Ali Shah, Mark Laws, Taha al-Adhami, Khondaker Miraz Rahman, Imtiaz Ali Khan, Zahid Shafiq, and Jamshed Iqbal
- Subjects
General Chemical Engineering ,General Chemistry - Published
- 2022
34. Sustainable Conversion of Wastes into Green Bioproducts to Introduce Diversification and Green Economy in the Sugar Industry. A Review
- Author
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Noé Aguilar-Rivera, Muhammad Tahir Khan, Imtiaz Ahmed Khan, Rashid Iqbal, and Muhammad Mahran Aslam
- Subjects
Agronomy and Crop Science - Published
- 2022
35. Nucleotide pyrophosphatase/phosphodiesterases (NPPs) including NPP1 and NPP2/ ATX as important drug targets: A patent review (2015-2020)
- Author
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Sehrish, Bano, Mariya, Al-Rashida, Rima D, Alharthy, Imtiaz Ali, Khan, and Jamshed, Iqbal
- Subjects
Patents as Topic ,Pharmacology ,Structure-Activity Relationship ,Phosphoric Diester Hydrolases ,Drug Discovery ,Humans ,General Medicine ,Pyrophosphatases - Abstract
Ectobucleotidases are a broad class of extracellular nucleotide and nucleoside hydrolyzing enzymes. Since they play a crucial role in mediating purinergic cell signalling, they are promising therapeutic targets for treatment of a range of disorders, including fibrosis, tumor metastasis, inflammation, multiple sclerosis, and autoimmune diseases. Hence selective inhibtors of ectonulceotidases are of great interest for therapeutic intervention.Many compounds have demonstrated promising inhibitory potential against ecto-nucleotide pyrophosphatase/phosphodiesterases (NPPs). The chemistry and clinical applications of NPP inhibitors patented between 2015 and 2020 are discussed in this review.In recent years, there has been a lot of effort towards finding effective and selective inhibitors of NPPs. Even though a number of inhibitors are known, only a few in vivo investigations have been published. In addition to IOA-289, which has passed Phase Ia clinical trials, potent NPP2/ATX inhibitor compounds such as BLD-0409, IPF and BBT-877 have been placed in phase I clinical studies. Some of the most promising NPP2/ATX inhibitors in recent years are closely related analogs of previously known inhibitors, such as PF-8380. Knowledge of the structure activity relationship of such promising inhibitors can potentially translate into the discovery of more potent and effective inhibitors of NPP.
- Published
- 2022
36. Competitive ability of sunflower (Helianthus annuus L.) breeding material under Cyperus rotundus infestation
- Author
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Shoaib Anwar Kohli, Saeed Rauf, Muhammad Waqas Khalid, Wardah Kainat, Jakub Paderweski, Hassan Munir, Ali Hassan, Ijaz Rasool Noorka, and Imtiaz Akram Khan Niazi
- Subjects
parasitic diseases ,food and beverages ,Agronomy and Crop Science - Abstract
Weed infestation induces intense competition with the sunflower crop for soil nutrients, space and light causing significant yield losses of the sunflower. Therefore, study was undertaken during the year 2013–15 at College of Agriculture, University of Sargodha, Pakistan to determine the effect of Cyperus rotundus infestation on various morphological and biochemical traits. Initially a screening experiment was carried out to screen against C. rotundus infestation. Later on, cross combinations of selected cytoplasmic male sterile and restorer lines were attempted to develop F1 progenies which were compared with commercial hybrids along with parents. There were 6 parental lines (3 A and 3 R lines) along with 9 single cross combinations obtained from these parents. Experiment was carried out in complete randomized design having factorial arrangement with three replications. Weed in one of regime latter called as control were completely absent, while in weed infestation regimes 5 and 10 plants of C. rotundus were maintained. Results showed that C. rotundus infestation causes significant damage to the sunflower plants. Generally cross combination showed a decrease of leaf area by 440% and 264%, 61% and 49% for chlorophyll contents, 133% and 191% for head weight under low and high weed infestation regime respectively. However, antioxidant activity increased by 44% and 49% under low and high infestation regime induced by C. rotundus. Sunflower genotypes also showed variability in competitive ability against C. rotundus weed. Cross combinations coded as (A10, A7 and A2) showed lower comparative decrease for seed yield and oil contents when compared with standard hybrids under the presence of C. rotundus. Development of sunflower hybrids with better competitive ability under the presence of weeds such as C. rotundus may able to enhance plant development and lower yield losses in sunflower field with minimum the use of herbicide.
- Published
- 2022
37. Dr IMPACT OF VARIOUS ORGANIC AND CULTURAL PRACTICES ON YIELD AND WEED MANAGEMENT IN OKRA (Abelmoschus esculanta L.)
- Author
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IMTIAZ KHAN Khan
- Abstract
Weed management in okra field is one of the most challenging and expensive steps that ultimately reducing the productivity. A field experiment was conducted to evaluate impact of various organic and cultural practices on yield and weed management in okra crop at Agronomy Research Farm, The University of Agriculture, Peshawar, Pakistan during spring season 2021 in a Randomized Complete Block Design (RCBD) having three replications. The following treatments were applied to the experimental trail. T1=Parthenium Parthenium hysterophorus) weed extraction (120g/L), T2= Coco grass (Cyperus rotundus) weed extraction (120g/L), T3= Field bind weed (Convolvulus arvensis) weed extraction (120g/L), T4= Mulching (Eucalyptus leaves), T5= Mulching (News Paper), T6= Hand weeding (Once) 20 days, T7= Hand weeding (Twice) 20 &40 days, T8= Weedy check. Results shows that all the studied parameters of okra crop were significantly affected by all the applied treatments except number of flowers plant-1. Maximum weed fresh biomass (143.3g), weed dry biomass (42.2g), plant height (64.2cm), number of branches plant-1, (11), fruit length (11.73 cm), fruit diameter (1.8 cm) and yield (3246.6kg/ha) were noted in a Hand weeding (Twice) 20- & 40-days treatment followed by Hand weeding (Once) after 20 days, however the minimum values was noted in weedy check treatment except weed density which was found maximum in weedy check treatment. Hand weeding twice after 20 & 40 days of crop sowing was recommended to get in okra crop better yield.
- Published
- 2022
38. Biophysical Management of Aphid (Schizaphis graminum Rondani) (Hemiptera: Aphididae) in Wheat Crop
- Author
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Hassan, Muhammad Waqas Ul, primary, Nadeem, Muhammad, additional, Rehman, Hafeez Ur, additional, Iqbal, Jamshaid, additional, Hanif, Muhammad Shakeel, additional, Rasool, Amer, additional, Niazi, Imtiaz Akram Khan, additional, Aslam, Muhammad, additional, Ghaffar, Abdul, additional, Hayat, Sikandar, additional, Khan, Aftab Ahmad, additional, and Haque, Ehsan Ul, additional
- Published
- 2023
- Full Text
- View/download PDF
39. Some Records of Skippers (Lepidoptera: Hesperioidea: Hesperiidae) from Balochistan Province, Pakistan
- Author
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Muhammad Ather Rafi, Fariha Mengal, Saima Durrani, Gulnaz Parveen, Qudrat Ullah, Muhammad Qasim, Imtiaz Ali Khan, Adnan Sami, Muhammad Saeed, Zara Urooj, and Ghulam Rasul
- Subjects
General Agricultural and Biological Sciences - Abstract
Skipper fauna of Balochistan province is not properly studied. To fill this gap, a study was conducted to explore the skipper's fauna from previous literature and new collection from Balochistan, Pakistan. We report 21 species of skippers from two subfamilies, Coeliadinae and Hesperiinae. Out of 21 species five species namely Hesperia comma (Linnaeus, 1758), Parnara guttatus (Bremer and Grey, 1852), Pyrgus cashmirensis Moore (1874), Pyrgus darwazicus Grum-Grshimailo (1890) and Pyrgus sidae (Esper, 1784) under subfamily Hesperiinae are recorded for the first time from Balochistan. Out of five reported species from Balochistan, two species Pyrgus darwazicus and Pyrgus sidae are new records for Pakistan.
- Published
- 2022
40. How do farmers cope with climate change? An analysis of alternative adaptation strategies in drought-hit areas of Khyber Pakhtunkhwa—Pakistan
- Author
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Imtiaz Alam Khan, Muhammad Rafiq, Sanaullah Panezai, Shahab E. Saqib, Raza Ullah, and Muhammad Atiq
- Subjects
Atmospheric Science ,Earth and Planetary Sciences (miscellaneous) ,Water Science and Technology - Published
- 2022
41. The Role of Islamic Law in Convergence to Western Corporate Governance Features in Pakistan
- Author
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Dr. Imtiaz Ahmed Khan
- Abstract
This article examines the role of Islamic Law in convergence to western corporate governance features in Pakistan. The recent financial crisis in the world highlighted the importance of good corporate governance features. This phenomenon highlighted the possibility of adopting an alternative to conventional financial system in Pakistan. Islamic finance has shown its presence in the wake of financial crisis in the world. Therefore, this articles analyses, in comparative perspective, the Islamic financial system viz a viz conventional financial system. It further analyses the possibility of convergence of corporate governance mechanism, which is key for good governance in any financial system, in Pakistan. It concludes that Islamic Financial System may be adopted as alternative financial system as well as corporate governance mechanism may be converged to western corporate governance features in Pakistan. However, while doing so Islamic norms may act as a litmus test which may not be as problematic as it appears at first sight.
- Published
- 2021
42. ارض مقدسہ کے قرآنی آثار اور مولانا ڈاکٹر سیدشیر علی شاہ مدنیؒ کے مشاہدات کا مطالعہ
- Author
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Imtiaz ali Khan and Saeed ur Rahman Khan
- Subjects
Cultural Studies ,Religious studies - Abstract
Ardhe-e-Quran (The Land and Nation in the Quran) is one of the major parts of Quranic studies which means the description of those lands or nations in the Quran which have been traveled and observed. The Shariah scholars of the Muslim world whether classical or contemporary have made these observations of “Ardhe-e-Quran”. In this regard, the scholars of India have also made a significant contribution. Travel of the pass-outs of Jamia Dar-ul-Uloom Haqqania to these places and cities is also a part of this series. Especially Maulana Sher Ali Shah has lived in Arab countries and then he has made a regular journey to these places mentioned in the Qur'an. He observed Qur'anic places from Baitullah to Baitul Muqaddas.His travelogues, especially regarding Syria, contain useful information. The land of Syria is the blessed land, here is Jerusalem, in which Allah Almighty has created spiritual and spiritual charm when Maulana Dr. Sher Ali Shah visited this blessed city. He toured the city and observed the Quranic places. Maulana Dr. Sher Ali Shah went on Hajj by land on foot in 1966. After receiving permission from the embassies of Iran, Jordan, and Iraq, he reached Haramain on his way. After entering Iraq on January 2, 1967, he arrived in Baghdad, stayed there, and toured historical sites, then went to Jerusalem and observed the holy places there. The golden impressions of this journey, the observations of the historical places and the details of Hajj he has written under the title of “Chand din Masjid Aqsa ki Fidhaon me (A few days in spiritual surroundings of Al-Aqsa Mosque)" and "In the luminous surroundings of the Harmain". In these journeys, He also observed the land of the Qur'an and the holy places, besides ancient libraries and Makhtootat. Maulana Dr. Saeed-ul-Haq Jadoon and Mufti Bakht Shaid have written a two-volume book on the life and services of Maulana Sher Ali Shah Madani entitled "Maulana Sher Ali Madani: Life and services”. In this book, Maulana Dr. Saeed-ul-Haq Jadoon has written a separate chapter on the “Observations and research on Ardh-e-Quran by Dr. Sher Ali Shah”. In which Maulana Sher Ali Shah Madani has given a detailed discussion on these observations. In this regard, the researcher has intended to enlighten his analytical study on the topic of Ardh-e-Quran.
- Published
- 2021
43. Phytochemical composition, in vitro urease, α-glucosidase and phosphodiesterase inhibatroy potency of Syzygium cumini (Jamun) fruits
- Author
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Abdur Rauf, Muhammad Israr, Yahya S. Al-Awthan, Imtiaz Ali Khan, Naveed Muhammad, Mohammad S. Mubarak, and Omar Bahattab
- Subjects
0106 biological sciences ,chemistry.chemical_classification ,biology ,Traditional medicine ,Urease ,Ethyl acetate ,Glycoside ,Phosphodiesterase ,Plant Science ,biology.organism_classification ,01 natural sciences ,0104 chemical sciences ,010404 medicinal & biomolecular chemistry ,chemistry.chemical_compound ,chemistry ,Phytochemical ,Syzygium ,biology.protein ,Potency ,Phenols ,010606 plant biology & botany - Abstract
Syzygium cumini L. (Jamun) is a Pakistani indigenous plant, which exhibits various diseases biological activities including antidiabetic, antiulcer, hepatoprotective, and even diuretic. The present work was carried out to provide a scientific justification to its use in folk medicine. In the current research work, the crude methanol extract and subsequent fractions of S. cumini fruits were subjected to phytochemical studies, along with urease, α-glucosidase, and phosphodiesterase inhibition profiling. Results showed that the plant is a rich source of various classes of compounds such as alkaloids, steroids, flavonoids, carbohydrates, phenols, glycosides, saponins, and tannins. In addition, results indicated that the crude extract and fractions significantly inhibit the aforementioned enzymes at tested concentrations. The observed urease inhibitory activity (IC50 values) of methanol, ethyl acetate, n-butanol, and chloroform were 10.17 ± 1.00, 7.09 ± 2.00, 8.32 ± 1.76, and 12.23 ± 1.09 µg, respectively. Similarly, the crude methanol extract, ethyl acetate, chloroform, and n-butanol factions exhibited significant α-glucosidase inhibitory potential with IC50 values of 129.98 ± 1.23, 702.74 ± 1.65, 430.21 ± 1.98, and 650.11 ± 1 0.00 µg, respectively, as compared to the standard. On the other hand, the ethyl acetate and n-butanol factions showed excellent phosphodiesterase inhibitory effect with IC50 values of 270.77 ± 1.98 and 87.09 µg, respectively. The antagonistic effect of these samples is attributed to the presence of different phytochemicals. Moreover, the inhibition of these enzymes provided a sound scientific backup to the mentioned folklores.
- Published
- 2021
44. Nibble-CRC for Underwater Acoustic Communication.
- Author
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Imtiaz Ahmed Khan, Nam-Yeol Yun, and Soo-Hyun Park
- Published
- 2012
- Full Text
- View/download PDF
45. A Standard Error Detection Mechanism for Underwater Acoustic Sensor Networks.
- Author
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Imtiaz Ahmed Khan, Nam-Yeol Yun, Sardorbek Muminov, Soo-Hyun Park, and Changhwa Kim
- Published
- 2012
- Full Text
- View/download PDF
46. A Mystery of Academic and Industrial Skill Discordance among Business Graduates in Pakistan
- Author
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null Dr. Naveed Hussain Shah, null Dr. Imtiaz Ali Khan, null Dr. Burhan Ali Shah, and null Dr. Faisal Khan
- Abstract
The study had explored the cognitive, non-cognitive and vocational skill required by the Pakistani organizations and found that there are various dimension that employer are interested among their potential employee. It was observed that Non cognitive are the more deficient one among the focused and as per gender is concerned their little response as per all skills however on Non-cognitive skills a bet more maturity exist among female candidates whereas the confidence level and lower literacy rate disturb their response on job market. Curriculum covering the Field specific theoretical and practical knowledge there is rare convergence on field specific practical knowledge. The study reveals a higher attention on industry academia collaboration through developing a high level of university-Industry linkages.
- Published
- 2021
47. Effect of Tillage Implements and Weed Management Techniques On Nutritive Values of Wheat Grains
- Author
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Muhammad Ishfaq Khan, Imtiaz Ali Khan, Abdul Majid Khan Dawar, and Zahid Hussain
- Subjects
Parthenium ,Tillage ,Aqueous extract ,Protein content ,Animal science ,biology ,Fat content ,food and beverages ,General Agricultural and Biological Sciences ,biology.organism_classification ,Weed control ,Weed ,Nutritive values - Abstract
Field experiments were conducted on wheat during 2017–2018 and 2018–2019 under rainfed conditions. The statistical significance between treatment means was determined at 5% significance level. Data were recorded on weed density, protein, fat and ash contents of wheat grains. Weed density in shallow tillage was highest (20.67 m−2) while it was lowest (14.23 m−2) in deep tillage. In weed control factor, weed density was highest in weedy check (33.10 m−2), followed by parthenium aqueous extract (21.50 m−2), and lowest (6.79 m−2) in plots treated with Affinity (isoproturon + carfentrazone). Results showed that the highest crude protein content (10.88%) was recorded in deep tillage, while lowest (10.45%) in shallow tillage, indicating that tillage depths have an impact on wheat grains protein content. For weed control factor, the crude protein content was highest (11.98%) in Affinity treated plots, followed by herbicides, Buctril super (bromoxynil + MCPA) (11.44%) and Puma super (fenoxaprop-p-ethyl) (11.12%). Hence, the control measures also affected crude protein content of wheat grains, which is also obvious from the weedy check where wheat grains crude protein content was lowest (9.73%). The two years combined data analysis also showed the highest crude fat content (1.75%) in deep tillage treatments followed by normal tillage (1.67%) and lowest fat content (1.53%) in shallow tillage. For ash content, the highest content (3.03%) was with Affinity herbicide treatments, followed by Buctril super (2.74%) and Puma super (2.48%) herbicides. In conclusion, both the tillage and herbicides indicated positive effects on the nutritive status of wheat grains.
- Published
- 2021
48. Life Imprisonment without Parole in China: Substituting Death for Economic Crimes
- Author
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Hafiz Abdul Rehman Saleem, Imtiaz Ahmad Khan, and Hamid Mukhtar
- Abstract
Life imprisonment without parole and commutation (LWOP) came under Ninth Amendment to the 1997 Criminal Law of Peoples Republic of China as a proviso to the suspended death penalty for corruption crimes. The legislative intent given for the arrival of new punishment depicts LWOP as a solution for the disparity in a suspended death sentence, controlling judicial discretion and proportional punishment for corruption which is debated as not an exhaustive and compelling justification. The manuscript addresses a substantive question; if LWOP is suitable for the criminal justice system in China? And is answered under three normative claims, namely necessity, effectiveness, and humanness.The examination of the topic contends LWOP is more of an effective tool in broader anti-corruption strategy than a need for domestic utilization.LWOP in China gives no hope of release and stands inconsistent with Article 3 of the European Convention on Human Rights
- Published
- 2021
49. SOIL WEED SEED BANK STATUS IN THE AGROECOLOGICAL CONDITIONS OF CHITRAL, PAKISTAN
- Author
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Imtiaz Ali Khan, Abdul Majid Khan, Ata Ullah, Faraz Ali Shah, Zahid Hussain, Haroon Khan, Luqman Luqman, and Miftah Ud-Din
- Subjects
Geography ,Agronomy ,Weed ,Agroecology - Abstract
A greenhouse experiment was carried out at the Agricultural Research Station (ARS), Shen Lasht, Chitral during 2016-17. There were five different locations in district Chitral from where the soil samples were collected which included Drosh, Shen Lasht, Garam Chashma, Ayun and BoonyLasht. A total of 300 samples were collected from all locations with 60 samples from each location. The 300 soil samples collected were placed in trays of medium sizes i.e. 27 cm x 21 cm x 4 cm = 2268 cm3. The trays were arranged in three repetitions having 100 samples in each repetition. Each repetition of 100 samples contained samples from 5 locations, in each location 4 sites (east, west, north and south each at 100 m distance from each other) and at each site samples were collected from 5 different depths, making a total of 100 samples in one repetition i.e. 5 x 4 x 5 = 100 and with repetitions making a total of 300 samples in one district. The results indicated that in the soil samples of district Chitral a total of 31 noxious weeds were recorded. Out of the 31 different weeds, 23 were broad leaves, eight were grasses and one was sedge. In another angle, 24 weeds were annuals while the rest were perennials out of the 31 weeds identified. A total of 17 different plant families were represented by the weeds recorded in the soil samples of Chitral region. Among the different locations of Chitral, the highest weed seed bank was recorded in the soil samples of ARS Shen Lasht area. Weed seed banks have always been higher in areas with mild winters, where the Shen lasht area is having milder winters as compared to the other areas in Chitral. The lowest seed bank was recorded in the soil samples of Garam Chashma, which was however statistically at par with the rest of the locations studied in Chitral. As far as the seed banks in the depths are concerned, largest weed seed bank was observed in the depth of 6 to 12 cm. The smallest seed bank was at the depth of 30 cm followed by the depth of 24 and 18 cm. Therefore, it is evident that the major weed seed bank lies in the upper 6-12 cm depth of the soil. In case of the interaction, the largest weed seed bank was recorded at ARS Sheen lasht at the depth of upper 6 cm of the soil profile whereas the weed seed bank was very low below the 12cm depth of soil upto 30 cm in the Garam Chashma area of Chitral. Out of the total 31 weeds recorded in soil samples of Chitral, the top 10 weeds in terms of the relative weed densities, relative weed frequencies and importance value indices were Convolvulus arvensis, Rumex crispus, Poa annua, Galium aparine, Avenafatua, Trianthemaportulacastrum, Silybum marianum, Sorghumhalepense, Euphorbia helioscopia, and Loliumtenulentumspecies. The IVI values for these weeds were 14.01, 13.96, 13.07, 11.83, 11.57, 11.12, 10.35, 10.09, 10.02, and 9.99, respectively. Moreover, these IVIs indicate that out of the topmost 10 problematic weeds eight weeds are broad leaved and two are grassy weeds.
- Published
- 2021
50. Doctrine of Just and Equitable Winding Up as Minority Shareholders’ Remedy in Pakistan
- Author
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Imtiaz Ahmed Khan, Hafiz Abdul Rehman Saleem, and Hamid Mukhtar
- Abstract
This article examines the doctrine of just and equitable winding as a minority shareholders' remedy in Pakistan. This is a residual remedy and developed with the passage of time for the protection of minority shareholders in the UK. The courts in the UK have established different views regarding circumstances in which remedy may be sought. In some cases, the court held that the jurisdiction of winding up is not different from unfair prejudice. Therefore, this article will further discuss the possibility of seeking remedy viz a viz other minority shareholders’ protection mechanism such as remedy against unfair prejudice.This article is based on qualitative research. The doctrinal and comparative research methods have been applied in the research. This article concludes that the remedy of winding up on just and equitable grounds may be effective only when the grounds for seeking remedy are wider than the unfair prejudice remedy
- Published
- 2021
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