AbstractFor the first time, chloroform and 2-butanol were used as solvent systems for the prepara... more AbstractFor the first time, chloroform and 2-butanol were used as solvent systems for the preparation of ZrO2–PANI and CeO2–PANI composites. Solubility of the synthesized composites was studied in chloroform, N-methyl-2-pyrrolidinone (NMP), and in mixture of toluene + 2-propanol (2:1). XRD and cyclic voltammetry data showed that the ZrO2–PANI and CeO2–PANI composites possess both crystalline and amorphous domains indicating some sort of conductivity. TGA results showed that ZrO2–PANI composite have a better thermal stability than pure PANI; however, CeO2–PANI composite has lower thermal stability than pure PANI. The conjugated unsaturated structure of PANI is responsible for the enhanced photocatalytic properties of ZrO2–PANI and CeO2–PANI. Photocatalytic results showed that, at photolysis time of 60 min, rhodamine B (RhB) dye was degraded up to 34 and 35% by ZrO2–PANI and CeO2–PANI, respectively. The degradation products of RhB were quantified by LC–MS and GC–MS, and accordingly, a detailed pathway was proposed.
Cadmium (Cd) is one of the non-essential, highly toxic environmental pollutants worldwide causing... more Cadmium (Cd) is one of the non-essential, highly toxic environmental pollutants worldwide causing serious environmental and agricultural problems. Elevated Cd doses are carcinogenic to humans. It is ranked seventh in the list of top 20 toxic metals and classified as a group 1 carcinogen. The median range of Cd dietary intake (66.5–116 µg Cd kg −1 body weight per month) is much higher than maximum limit (25 µg Cd kg −1 body weight per month) reported by FAO/WHO. Toxicity of Cd causes a range of damages to plants from germination to yield; however, the extent of damage is concentration and time-dependent. Reduction in seed germination and plant growth is primarily due to Cd interference with enzymatic and photosynthetic activities and membrane damage. Cadmium exposure at higher rates disturbs the nutritional and water relations of plants and causes oxidative damage. Moreover, Cd-induced structural changes in the photosynthetic apparatus disturb the yield of plants. In this review, adverse effects of Cd on seed germination, stand establishment, plant growth, uptake and assimilation of nutrients, enzymatic activities, ultra-structural and oxidative damages, changes in antioxidant defense system and stress proteins, carbon metabolism, and yield formation are reported. Moreover, Cd dynamics in soil rhizosphere and factors affecting Cd dynamics in soil have also been discussed. Furthermore, remediation strategies (physical, chemical, biological, and amendments) to decontaminate Cd-polluted soils have also been described in this review. Through phytoremediation, Cd can be extracted and stabilized in the soil while through microbes Cd can be sequestrated into their bodies. Increased Cd uptake in hyperaccumulator plants to remediate and convert the toxic form of Cd into nontoxic forms. While in chemical remediation, Cd can be washed out, immobilized and stabilized in the soil through chemical amendments. Bioremediation of polluted sites is considered effective and reliable due to its eco-friendly features. Moreover, Cd uptake and toxicity in rice can be decreased by proper application of essential nutrients such as nitrogen, zinc, iron, and selenium in Cd contaminated soils. The organic amendments may help through an increase in soil pH, adsorption in its functional groups, the formation of complexations, and the conversion of exchangeable to residual forms. Adoption of some agricultural practices are also found to be effective in reducing the Cd uptake and accumulation in plants and harvesting quality food from Cd contaminated soils.
2021 International Conference on Electrical, Communication, and Computer Engineering (ICECCE), 2021
In recent decades, there has been a substantial growth in EVs sales which would eventually reduce... more In recent decades, there has been a substantial growth in EVs sales which would eventually reduce GHG emissions and improve the energy structure. However, effective exploitation of EVs requires the combination of technologies, demand, financial and political considerations which make EV transitions a more enticing option to the users. In this transition, the features of battery technology would play an integral part in the evaluation of the efficiency, cost-effectiveness, and durability of EVs. Different types of batteries have been deployed for EVs and it is not possible to determine which battery ideally satisfies all main features, including energy density, reliability, efficiency, protection, costs, and lifespans. This paper gives a detailed description of current battery technologies and examines some of the principal opportunities and shortcomings for EV applications. The study indicates that the main obstacles to large implementation in the EV industry are energy density, retail costs, technological malignancies, and power dwindling at high temperatures.
Electricity and heat energy carriers are mostly produced by the fossil fuel sources that are conv... more Electricity and heat energy carriers are mostly produced by the fossil fuel sources that are conventionally operated independently, but these carriers have low efficiency due to heat losses. Moreover, a high share of variable renewable energy sources disrupts the power system reliability and flexibility. Therefore, the coupling of multiple energy carriers is underlined to address the above-mentioned issues that are supported by the latest technologies, such as combined heat and power, heat pumps, demand response, and energy storages. These coupling nodes in energy hubs stimulate the conversion of the electric power system into the integrated energy system that proves to be cost-effective, flexible, and carbon-free. The proposed work uses EnergyPLAN to model electricity, district, and individual heating integrated energy system of China for the year 2020. Furthermore, the addition of heat pumps, thermal storage, and demand response is analyzed in different scenarios to minimize the annual costs, fuel consumption, and CO 2 emissions. Technical simulation strategy is conducted for optimal operation of production components that result in the reduction of the above-mentioned prominent factors while calculating the critical and exportable excess electricity production. The simulation results demonstrate that demand response and thermal storage significantly enhance the share of variable renewable energy sources. In addition, it substantially reduces the annual costs and fuel consumption, while heat pump increases the system efficiency. INDEX TERMS Demand response, district heating, energy hub, EnergyPLAN, energy storage, integrated energy system, multiple energy carriers, variable renewable energy sources.
L'analyse séquentielle des séries argilo-carbonatées du Crétacé supérieur du Jebel Mrhila a c... more L'analyse séquentielle des séries argilo-carbonatées du Crétacé supérieur du Jebel Mrhila a conduit à définir cinq séquences sédi-mentaires majeures. La révision stratigraphique de ces dernières, basée sur les ammonites, échinides, foraminifères planctoniques et benthiques et ostracodes, a permis de les attribuer respectivement au Vraconien, au Cénomanien, au Turonien inférieur à moyen, au Turonien moyen-supérieur et au Santonien terminal-Campanien. Ces séquences, bathycroissantes puis bathydécroissantes ont été déposées dans des milieux marins de type plate-forme moyenne à externe, sous l'influence de facteurs tectoniques et eustatiques.
The study of isolated orthophragminid tests at the type-locality of Discocyclina ranikotensis Dav... more The study of isolated orthophragminid tests at the type-locality of Discocyclina ranikotensis Davies from the Patala Formation in Thal area (Upper Indus Basin, NW Pakistan) revealed new associations of genera Discocyclina Gümbel, and Orbitoclypeus Silvestri, not yet reported from eastern Tethys. We demonstrate that D. ranikotensis Davies, the species identity of which has been a subject of controversy in earlier works, is a valid species endemic at least to the Indo-Pakistan region. D. ranikotensis is associated with Discocyclina archiaci (Schlumberger), and very sparse Orbitoclypeus schopeni (Checchia-Rispoli), both species being key taxa for orthophragminid zonation in peri-Mediterranean Tethys. We have also identified a few discocyclinid specimens suggesting possible connection to western Tethys species D. fortisi, and a few specimens showing affinity to D. dispansa. The assemblages of orthophragminids suggest orthophragminid zone (OZ) 3 according to western Tethyan zonation scheme. The occurrence of D. archiaci extends the geographical distribution of this taxon to eastern Tethys, which hitherto was only known from peri-Mediterranean region. The typical western Tethyan asterocyclinids, nemkovellids and ribbed orbitoclypeids, first appearing at or around Paleocene/Eocene boundary (OZ 1B/2, SBZ4/5), have not been identified.
Objectives: Radial artery occlusion is a silent complication of a transradial approach to cardiac... more Objectives: Radial artery occlusion is a silent complication of a transradial approach to cardiac catheterization that may complicate subsequent transradial procedures in patients undergoing cardiac catheterization. A transradial band reduces vascular complications and provides brisk, powerful and effective haemostasis. The purpose of this study was to assess the frequency of radial artery occlusion in 180 patients undergoing transradial coronary catheterization. Results: The median age of the study cohort was 58 years. Radial artery occlusion was found in 14 (7.8%) patients. When stratifying by age group and sex, there was no significant difference in radial artery occlusion between age groups and sex. It was likewise found that comorbidities such as diabetes mellitus, hypertension and smoking, increased the risk of radial artery occlusion however this was observed to be significant only for diabetes mellitus. We therefore conclude that a transradial pneumatic pressure band is an extremely helpful and safe strategy to prevent radial artery occlusion.
Idiopathic thrombocytopenic purpura (ITP) is a common hematologic disease of variable clinical se... more Idiopathic thrombocytopenic purpura (ITP) is a common hematologic disease of variable clinical severity. Low platelet counts is the clinical hallmark of disease. We report a case of young male patient with ITP who presented twice with acute myocardial infarction (MI) and reinfarction. He underwent primary percutaneous coronary intervention (PCI) on both occasions. We highlighted the management difficulties of interventional procedure like to decide whether do only balloon angioplasty, implant bare metal stent (BMS) or drug eluting stent (DES), duration of dual antiplatelet agent (DAPT) and final outcome of our patient.
Ag(I) has been electrodeposited on a stainless steel electrode inserted in strip side solution ac... more Ag(I) has been electrodeposited on a stainless steel electrode inserted in strip side solution across tri-n-dodecylamine-xylene base supported liquid membrane. The electrodeposition of Ag + was dependent on different variables like current density, tri-n-dodecylamine (TDDA) concentration in the liquid membrane, nitric acid (HNO 3) concentration in the feed solution, ammonia (NH 3) concentration in strip phase, stirring speed and source concentration. The optimum conditions for the electrodeposition of Ag + are 0.957 M TDDA in membrane phase, 1.0 M NH 3 in strip solution, 1.0 M HNO 3 in the feed solution, 6 × 10-1 mM Ag + in source and 900 rpm of stirring speed. The complex formation was confirmed through graphical elucidation whereas the number of moles of TDDA interacting with Ag + was one. The electrodeposition of Ag + on the stainless steel electrode was verified via inductively coupled plasma and Faraday laws. The recovery of the Ag + has been exceeded up to 99.40% from 98% coupling with three-electrode system. The stability of the membrane was the same as 120 h.
Zeitschrift für Physikalische Chemie, May 20, 2021
The alarming energy crises has forced the scientific community to work for sustainable energy mod... more The alarming energy crises has forced the scientific community to work for sustainable energy modules to meet energy requirements. As for this, ZnO/g-C3N4 nanocomposites with proper heterojunction were fabricated by coupling a proper amount of ZnO with 2D graphitic carbon nitride (g-C3N4) nanosheets and the obtained nanocomposites were applied for photocatalytic hydrogen generation from water under visible light illumination (λ > 420 nm). The morphologies and the hydrogen generation performance of fabricated photocatalysts were characterized in detail. Results showed that the optimized 5ZnO/g-C3N4 nanocomposite produced 70 µmol hydrogen gas in 1 h compare to 8 µmol by pure g-C3N4 under identical illumination conditions in the presence of methanol without the addition of cocatalyst. The much improved photoactivities of the nanocomposites were attributed to the enhanced charge separation through the heterojunction as confirmed from photoluminescence study, capacity of the fabricated samples for •OH radical generation and steady state surface photovoltage spectroscopic (SS-SPS) measurements. We believe that this work would help to fabricate low cost and effective visible light driven photocatalyst for energy production.
International Journal of Biological Macromolecules, Dec 1, 2020
In this study, cobalt oxide nanoparticles (Co 3 O 4 NPs) were synthesized by precipitation method... more In this study, cobalt oxide nanoparticles (Co 3 O 4 NPs) were synthesized by precipitation method from cobalt sulphate solution with basic pH, followed by calcination. The ex-situ synthesized Co 3 O 4 NPs were mixed with hot agar (AG) aqueous solution. The preparation of AG-Co 3 O 4 nanocomposite hydrogel was carried out by selfassociation method promoted by thermal denaturation. The quenching of hot suspension from 80°C to room temperature resulted in the formation of AG-Co 3 O 4 nanocomposite hydrogel. The as-synthesized AG-Co 3 O 4 was characterized by FTIR, XRD and SEM techniques. In order to test the catalytic activity, AG-Co 3 O 4 was used as a heterogeneous catalyst for the reduction of methylene blue (MB), congo red (CR) and 4-nitrophenol (4-NP). The excellent performance of the AG-Co 3 O 4 was shown by the reaction rate constant (k app) values of 0.3623, 0.2114 and 0.2893 for MB, 4-NP and CR, respectively. All these results were obtained with R 2 above 94 and utilization of an AG-Co 3 O 4 catalyst. Furthermore, the catalytic reduction was studied with varying dye concentration and catalyst dose. This study showed that AG-Co 3 O 4 catalyst has high potential for remediation of environmental pollutants in wastewaters.
International Journal of Biological Macromolecules, Jul 1, 2021
In this investigation, chitosan-coated nickel selenide nano-photocatalyst (CS-NiSe) were successf... more In this investigation, chitosan-coated nickel selenide nano-photocatalyst (CS-NiSe) were successfully prepared through the chemical reduction method. FTIR spectroscopy confirmed the synthesis of CS-NiSe nano-photocatalyst. Further, XRD analysis exhibited a monoclinic crystalline phase of photocatalyst with a crystallite size of 32 nm based on Scherer's equation. The SEM micrographs showed that the photocatalyst has an average particle size of 60 nm. The bandgap of CS-NiSe was 2.85 eV in the visible region of the spectrum. Due to this reason, the CS-NiSe was applied under solar light illumination for the photocatalytic activity of Erythrosine and Allura red dyes. The CS-NiSe presented the highest degradation efficiency of 99.53% for Erythrosine dye in optimized experimental conditions of 100 min at 30 °C, 30 ppm concentration, pH 5.0, and 0.14 g catalyst dose. For Allura red dye, a high degradation of 96.12% was attained in 120 min at pH 4.0, 100 ppm initial dye concentration, 35 °C temperature, and 0.1 g catalyst dose. The CS-NiSe showed excellent degradation efficiency and reduced to (95% for Erythrosine and 91% for Allura red dye) after five consecutive batches. Moreover, the statistical and neural network modelling analysis showed the significant influence of all studied variables on dyes degradation performance. The results demonstrated that CS-NiSe exhibited excellent photocatalytic performances for Erythrosine and Allura red dyes and could be a better photocatalyst for removing these dyes from industrial effluents.
The Pamir orogen forms the northwest prolongation of the Tibetan plateau. The most important surf... more The Pamir orogen forms the northwest prolongation of the Tibetan plateau. The most important surficial structure bounding the northern and northwestern margin is the Main Pamir Thrust (MPT); however, despite the importance of the structure, surprisingly little is known about the displacement history of the fault. Together with the younger, foreland-oriented Pamir Frontal thrust system (PFT), displacement estimates range from 50 to over 300 km. The larger estimates are based on the estimated Cenozoic northward indentation of the Pamir with respect to Tibet as well as the length of the intracontinental Pamir seismic zone. However, recent work suggests that some of the indentation predates the Cenozoic or is related to an original Paleozoic embayed paleogeography and other studies have suggested that the seismic zone is not related to intracontinental subduction. Shortening estimates in the hanging walls of the MPT and PFT suggest more modest amounts: between 30 and 75 km in the north, with higher values for SE-NW shortening in the Tadjik depression.Constraining the onset of deformation has proven challenging. Most publications suggest a late Oligo-early Miocene onset age. Cenozoic stratigraphic sequences are unfossiliferous and poorly dated. We have attempted to resolve this question by collecting samples for thermochronologic analysis from many locations along the arcuate margin. In general, zircon (U-Th-Sm)/He (ZHe) samples yield ages between ~60 and 17 Ma. Many are likely to be partially reset. Ages are slightly older in the east, which could reflect an overall westward increase in exhumation. The relatively small amount of exhumation in the north supports our structural interpretation that the MPT there has a low dip angle and might not have produced pronounced topography. Apatite fission track (AFT) and apatite (U-Th-Sm)/He (AHe) are often much younger; often between <15 and 10 Ma in the MPT hanging wall and < 10 Ma in the footwall. These younger ages may reflect the activation of a second pulse of exhumation linked to motion along the PFT. We are modeling these data sets using QTQt to try to better constrain the exhumation history of the fault system. In turn, these should help constrain shortening estimates.
Objective: To examine the possible difference in the short-term BP variabilitybetween diabetic an... more Objective: To examine the possible difference in the short-term BP variabilitybetween diabetic and non-diabetic hypertensives. Methodology: It is a prospective observational cohort study. The presentresearch was carried out in cardiology ward of Bahawalpur Victoria Hospital forthe duration of six months from 01-06-2018 to 30-11-2018. 392 patientsbetween 18 years to 60 years of age, including both genders are recruited in thestudy who are diabetic-hypertensives (exposed group) and hypertensiveswithout diabetes ((unexposed group) and blood pressure <140/90 mmHg bydrugs. Results: We measured 24-hr ambulatory BP in 196 diabetic hypertensive(diabetic HTN) and 196 non-diabetic hypertensive (non-diabetic HTN). Therewere no statistically significant differences in ambulatory day time systolic BP(130.71 mmHg vs. 128.88 mmHg), and night time ambulatory systolic BP(129.03 mmHg vs. 136.68 mmHg) between diabetic HTN and non-diabetic HTN.Diabetic HTN had a significantly greater day ambulatory systolic and diastolic BPvariability than non-diabetic HTN (4.80 mmHg vs. 4.18 mmHg, p < 0.05; 3.64mmHg vs. 2.80 mmHg, p < 0.05, respectively) and diabetic HTN had asignificantly greater night systolic and diastolic BP variability than non-diabeticHTN (4.99 mmHg vs. 3.88 mmHg, p < 0.05; 3.39 mmHg vs. 2.82 mmHg, p <0.05, respectively). Conclusion: These results demonstrate that BP variability is increased in diabetichypertensive. It is noted that fasting blood glucose level were found to be raised inpatients with increased BP variability. Key Words: Ambulatory blood pressure, Variability in blood pressure
AbstractFor the first time, chloroform and 2-butanol were used as solvent systems for the prepara... more AbstractFor the first time, chloroform and 2-butanol were used as solvent systems for the preparation of ZrO2–PANI and CeO2–PANI composites. Solubility of the synthesized composites was studied in chloroform, N-methyl-2-pyrrolidinone (NMP), and in mixture of toluene + 2-propanol (2:1). XRD and cyclic voltammetry data showed that the ZrO2–PANI and CeO2–PANI composites possess both crystalline and amorphous domains indicating some sort of conductivity. TGA results showed that ZrO2–PANI composite have a better thermal stability than pure PANI; however, CeO2–PANI composite has lower thermal stability than pure PANI. The conjugated unsaturated structure of PANI is responsible for the enhanced photocatalytic properties of ZrO2–PANI and CeO2–PANI. Photocatalytic results showed that, at photolysis time of 60 min, rhodamine B (RhB) dye was degraded up to 34 and 35% by ZrO2–PANI and CeO2–PANI, respectively. The degradation products of RhB were quantified by LC–MS and GC–MS, and accordingly, a detailed pathway was proposed.
Cadmium (Cd) is one of the non-essential, highly toxic environmental pollutants worldwide causing... more Cadmium (Cd) is one of the non-essential, highly toxic environmental pollutants worldwide causing serious environmental and agricultural problems. Elevated Cd doses are carcinogenic to humans. It is ranked seventh in the list of top 20 toxic metals and classified as a group 1 carcinogen. The median range of Cd dietary intake (66.5–116 µg Cd kg −1 body weight per month) is much higher than maximum limit (25 µg Cd kg −1 body weight per month) reported by FAO/WHO. Toxicity of Cd causes a range of damages to plants from germination to yield; however, the extent of damage is concentration and time-dependent. Reduction in seed germination and plant growth is primarily due to Cd interference with enzymatic and photosynthetic activities and membrane damage. Cadmium exposure at higher rates disturbs the nutritional and water relations of plants and causes oxidative damage. Moreover, Cd-induced structural changes in the photosynthetic apparatus disturb the yield of plants. In this review, adverse effects of Cd on seed germination, stand establishment, plant growth, uptake and assimilation of nutrients, enzymatic activities, ultra-structural and oxidative damages, changes in antioxidant defense system and stress proteins, carbon metabolism, and yield formation are reported. Moreover, Cd dynamics in soil rhizosphere and factors affecting Cd dynamics in soil have also been discussed. Furthermore, remediation strategies (physical, chemical, biological, and amendments) to decontaminate Cd-polluted soils have also been described in this review. Through phytoremediation, Cd can be extracted and stabilized in the soil while through microbes Cd can be sequestrated into their bodies. Increased Cd uptake in hyperaccumulator plants to remediate and convert the toxic form of Cd into nontoxic forms. While in chemical remediation, Cd can be washed out, immobilized and stabilized in the soil through chemical amendments. Bioremediation of polluted sites is considered effective and reliable due to its eco-friendly features. Moreover, Cd uptake and toxicity in rice can be decreased by proper application of essential nutrients such as nitrogen, zinc, iron, and selenium in Cd contaminated soils. The organic amendments may help through an increase in soil pH, adsorption in its functional groups, the formation of complexations, and the conversion of exchangeable to residual forms. Adoption of some agricultural practices are also found to be effective in reducing the Cd uptake and accumulation in plants and harvesting quality food from Cd contaminated soils.
2021 International Conference on Electrical, Communication, and Computer Engineering (ICECCE), 2021
In recent decades, there has been a substantial growth in EVs sales which would eventually reduce... more In recent decades, there has been a substantial growth in EVs sales which would eventually reduce GHG emissions and improve the energy structure. However, effective exploitation of EVs requires the combination of technologies, demand, financial and political considerations which make EV transitions a more enticing option to the users. In this transition, the features of battery technology would play an integral part in the evaluation of the efficiency, cost-effectiveness, and durability of EVs. Different types of batteries have been deployed for EVs and it is not possible to determine which battery ideally satisfies all main features, including energy density, reliability, efficiency, protection, costs, and lifespans. This paper gives a detailed description of current battery technologies and examines some of the principal opportunities and shortcomings for EV applications. The study indicates that the main obstacles to large implementation in the EV industry are energy density, retail costs, technological malignancies, and power dwindling at high temperatures.
Electricity and heat energy carriers are mostly produced by the fossil fuel sources that are conv... more Electricity and heat energy carriers are mostly produced by the fossil fuel sources that are conventionally operated independently, but these carriers have low efficiency due to heat losses. Moreover, a high share of variable renewable energy sources disrupts the power system reliability and flexibility. Therefore, the coupling of multiple energy carriers is underlined to address the above-mentioned issues that are supported by the latest technologies, such as combined heat and power, heat pumps, demand response, and energy storages. These coupling nodes in energy hubs stimulate the conversion of the electric power system into the integrated energy system that proves to be cost-effective, flexible, and carbon-free. The proposed work uses EnergyPLAN to model electricity, district, and individual heating integrated energy system of China for the year 2020. Furthermore, the addition of heat pumps, thermal storage, and demand response is analyzed in different scenarios to minimize the annual costs, fuel consumption, and CO 2 emissions. Technical simulation strategy is conducted for optimal operation of production components that result in the reduction of the above-mentioned prominent factors while calculating the critical and exportable excess electricity production. The simulation results demonstrate that demand response and thermal storage significantly enhance the share of variable renewable energy sources. In addition, it substantially reduces the annual costs and fuel consumption, while heat pump increases the system efficiency. INDEX TERMS Demand response, district heating, energy hub, EnergyPLAN, energy storage, integrated energy system, multiple energy carriers, variable renewable energy sources.
L'analyse séquentielle des séries argilo-carbonatées du Crétacé supérieur du Jebel Mrhila a c... more L'analyse séquentielle des séries argilo-carbonatées du Crétacé supérieur du Jebel Mrhila a conduit à définir cinq séquences sédi-mentaires majeures. La révision stratigraphique de ces dernières, basée sur les ammonites, échinides, foraminifères planctoniques et benthiques et ostracodes, a permis de les attribuer respectivement au Vraconien, au Cénomanien, au Turonien inférieur à moyen, au Turonien moyen-supérieur et au Santonien terminal-Campanien. Ces séquences, bathycroissantes puis bathydécroissantes ont été déposées dans des milieux marins de type plate-forme moyenne à externe, sous l'influence de facteurs tectoniques et eustatiques.
The study of isolated orthophragminid tests at the type-locality of Discocyclina ranikotensis Dav... more The study of isolated orthophragminid tests at the type-locality of Discocyclina ranikotensis Davies from the Patala Formation in Thal area (Upper Indus Basin, NW Pakistan) revealed new associations of genera Discocyclina Gümbel, and Orbitoclypeus Silvestri, not yet reported from eastern Tethys. We demonstrate that D. ranikotensis Davies, the species identity of which has been a subject of controversy in earlier works, is a valid species endemic at least to the Indo-Pakistan region. D. ranikotensis is associated with Discocyclina archiaci (Schlumberger), and very sparse Orbitoclypeus schopeni (Checchia-Rispoli), both species being key taxa for orthophragminid zonation in peri-Mediterranean Tethys. We have also identified a few discocyclinid specimens suggesting possible connection to western Tethys species D. fortisi, and a few specimens showing affinity to D. dispansa. The assemblages of orthophragminids suggest orthophragminid zone (OZ) 3 according to western Tethyan zonation scheme. The occurrence of D. archiaci extends the geographical distribution of this taxon to eastern Tethys, which hitherto was only known from peri-Mediterranean region. The typical western Tethyan asterocyclinids, nemkovellids and ribbed orbitoclypeids, first appearing at or around Paleocene/Eocene boundary (OZ 1B/2, SBZ4/5), have not been identified.
Objectives: Radial artery occlusion is a silent complication of a transradial approach to cardiac... more Objectives: Radial artery occlusion is a silent complication of a transradial approach to cardiac catheterization that may complicate subsequent transradial procedures in patients undergoing cardiac catheterization. A transradial band reduces vascular complications and provides brisk, powerful and effective haemostasis. The purpose of this study was to assess the frequency of radial artery occlusion in 180 patients undergoing transradial coronary catheterization. Results: The median age of the study cohort was 58 years. Radial artery occlusion was found in 14 (7.8%) patients. When stratifying by age group and sex, there was no significant difference in radial artery occlusion between age groups and sex. It was likewise found that comorbidities such as diabetes mellitus, hypertension and smoking, increased the risk of radial artery occlusion however this was observed to be significant only for diabetes mellitus. We therefore conclude that a transradial pneumatic pressure band is an extremely helpful and safe strategy to prevent radial artery occlusion.
Idiopathic thrombocytopenic purpura (ITP) is a common hematologic disease of variable clinical se... more Idiopathic thrombocytopenic purpura (ITP) is a common hematologic disease of variable clinical severity. Low platelet counts is the clinical hallmark of disease. We report a case of young male patient with ITP who presented twice with acute myocardial infarction (MI) and reinfarction. He underwent primary percutaneous coronary intervention (PCI) on both occasions. We highlighted the management difficulties of interventional procedure like to decide whether do only balloon angioplasty, implant bare metal stent (BMS) or drug eluting stent (DES), duration of dual antiplatelet agent (DAPT) and final outcome of our patient.
Ag(I) has been electrodeposited on a stainless steel electrode inserted in strip side solution ac... more Ag(I) has been electrodeposited on a stainless steel electrode inserted in strip side solution across tri-n-dodecylamine-xylene base supported liquid membrane. The electrodeposition of Ag + was dependent on different variables like current density, tri-n-dodecylamine (TDDA) concentration in the liquid membrane, nitric acid (HNO 3) concentration in the feed solution, ammonia (NH 3) concentration in strip phase, stirring speed and source concentration. The optimum conditions for the electrodeposition of Ag + are 0.957 M TDDA in membrane phase, 1.0 M NH 3 in strip solution, 1.0 M HNO 3 in the feed solution, 6 × 10-1 mM Ag + in source and 900 rpm of stirring speed. The complex formation was confirmed through graphical elucidation whereas the number of moles of TDDA interacting with Ag + was one. The electrodeposition of Ag + on the stainless steel electrode was verified via inductively coupled plasma and Faraday laws. The recovery of the Ag + has been exceeded up to 99.40% from 98% coupling with three-electrode system. The stability of the membrane was the same as 120 h.
Zeitschrift für Physikalische Chemie, May 20, 2021
The alarming energy crises has forced the scientific community to work for sustainable energy mod... more The alarming energy crises has forced the scientific community to work for sustainable energy modules to meet energy requirements. As for this, ZnO/g-C3N4 nanocomposites with proper heterojunction were fabricated by coupling a proper amount of ZnO with 2D graphitic carbon nitride (g-C3N4) nanosheets and the obtained nanocomposites were applied for photocatalytic hydrogen generation from water under visible light illumination (λ &gt; 420 nm). The morphologies and the hydrogen generation performance of fabricated photocatalysts were characterized in detail. Results showed that the optimized 5ZnO/g-C3N4 nanocomposite produced 70 µmol hydrogen gas in 1 h compare to 8 µmol by pure g-C3N4 under identical illumination conditions in the presence of methanol without the addition of cocatalyst. The much improved photoactivities of the nanocomposites were attributed to the enhanced charge separation through the heterojunction as confirmed from photoluminescence study, capacity of the fabricated samples for •OH radical generation and steady state surface photovoltage spectroscopic (SS-SPS) measurements. We believe that this work would help to fabricate low cost and effective visible light driven photocatalyst for energy production.
International Journal of Biological Macromolecules, Dec 1, 2020
In this study, cobalt oxide nanoparticles (Co 3 O 4 NPs) were synthesized by precipitation method... more In this study, cobalt oxide nanoparticles (Co 3 O 4 NPs) were synthesized by precipitation method from cobalt sulphate solution with basic pH, followed by calcination. The ex-situ synthesized Co 3 O 4 NPs were mixed with hot agar (AG) aqueous solution. The preparation of AG-Co 3 O 4 nanocomposite hydrogel was carried out by selfassociation method promoted by thermal denaturation. The quenching of hot suspension from 80°C to room temperature resulted in the formation of AG-Co 3 O 4 nanocomposite hydrogel. The as-synthesized AG-Co 3 O 4 was characterized by FTIR, XRD and SEM techniques. In order to test the catalytic activity, AG-Co 3 O 4 was used as a heterogeneous catalyst for the reduction of methylene blue (MB), congo red (CR) and 4-nitrophenol (4-NP). The excellent performance of the AG-Co 3 O 4 was shown by the reaction rate constant (k app) values of 0.3623, 0.2114 and 0.2893 for MB, 4-NP and CR, respectively. All these results were obtained with R 2 above 94 and utilization of an AG-Co 3 O 4 catalyst. Furthermore, the catalytic reduction was studied with varying dye concentration and catalyst dose. This study showed that AG-Co 3 O 4 catalyst has high potential for remediation of environmental pollutants in wastewaters.
International Journal of Biological Macromolecules, Jul 1, 2021
In this investigation, chitosan-coated nickel selenide nano-photocatalyst (CS-NiSe) were successf... more In this investigation, chitosan-coated nickel selenide nano-photocatalyst (CS-NiSe) were successfully prepared through the chemical reduction method. FTIR spectroscopy confirmed the synthesis of CS-NiSe nano-photocatalyst. Further, XRD analysis exhibited a monoclinic crystalline phase of photocatalyst with a crystallite size of 32 nm based on Scherer's equation. The SEM micrographs showed that the photocatalyst has an average particle size of 60 nm. The bandgap of CS-NiSe was 2.85 eV in the visible region of the spectrum. Due to this reason, the CS-NiSe was applied under solar light illumination for the photocatalytic activity of Erythrosine and Allura red dyes. The CS-NiSe presented the highest degradation efficiency of 99.53% for Erythrosine dye in optimized experimental conditions of 100 min at 30 °C, 30 ppm concentration, pH 5.0, and 0.14 g catalyst dose. For Allura red dye, a high degradation of 96.12% was attained in 120 min at pH 4.0, 100 ppm initial dye concentration, 35 °C temperature, and 0.1 g catalyst dose. The CS-NiSe showed excellent degradation efficiency and reduced to (95% for Erythrosine and 91% for Allura red dye) after five consecutive batches. Moreover, the statistical and neural network modelling analysis showed the significant influence of all studied variables on dyes degradation performance. The results demonstrated that CS-NiSe exhibited excellent photocatalytic performances for Erythrosine and Allura red dyes and could be a better photocatalyst for removing these dyes from industrial effluents.
The Pamir orogen forms the northwest prolongation of the Tibetan plateau. The most important surf... more The Pamir orogen forms the northwest prolongation of the Tibetan plateau. The most important surficial structure bounding the northern and northwestern margin is the Main Pamir Thrust (MPT); however, despite the importance of the structure, surprisingly little is known about the displacement history of the fault. Together with the younger, foreland-oriented Pamir Frontal thrust system (PFT), displacement estimates range from 50 to over 300 km. The larger estimates are based on the estimated Cenozoic northward indentation of the Pamir with respect to Tibet as well as the length of the intracontinental Pamir seismic zone. However, recent work suggests that some of the indentation predates the Cenozoic or is related to an original Paleozoic embayed paleogeography and other studies have suggested that the seismic zone is not related to intracontinental subduction. Shortening estimates in the hanging walls of the MPT and PFT suggest more modest amounts: between 30 and 75 km in the north, with higher values for SE-NW shortening in the Tadjik depression.Constraining the onset of deformation has proven challenging. Most publications suggest a late Oligo-early Miocene onset age. Cenozoic stratigraphic sequences are unfossiliferous and poorly dated. We have attempted to resolve this question by collecting samples for thermochronologic analysis from many locations along the arcuate margin. In general, zircon (U-Th-Sm)/He (ZHe) samples yield ages between ~60 and 17 Ma. Many are likely to be partially reset. Ages are slightly older in the east, which could reflect an overall westward increase in exhumation. The relatively small amount of exhumation in the north supports our structural interpretation that the MPT there has a low dip angle and might not have produced pronounced topography. Apatite fission track (AFT) and apatite (U-Th-Sm)/He (AHe) are often much younger; often between &lt;15 and 10 Ma in the MPT hanging wall and &lt; 10 Ma in the footwall. These younger ages may reflect the activation of a second pulse of exhumation linked to motion along the PFT. We are modeling these data sets using QTQt to try to better constrain the exhumation history of the fault system. In turn, these should help constrain shortening estimates.
Objective: To examine the possible difference in the short-term BP variabilitybetween diabetic an... more Objective: To examine the possible difference in the short-term BP variabilitybetween diabetic and non-diabetic hypertensives. Methodology: It is a prospective observational cohort study. The presentresearch was carried out in cardiology ward of Bahawalpur Victoria Hospital forthe duration of six months from 01-06-2018 to 30-11-2018. 392 patientsbetween 18 years to 60 years of age, including both genders are recruited in thestudy who are diabetic-hypertensives (exposed group) and hypertensiveswithout diabetes ((unexposed group) and blood pressure <140/90 mmHg bydrugs. Results: We measured 24-hr ambulatory BP in 196 diabetic hypertensive(diabetic HTN) and 196 non-diabetic hypertensive (non-diabetic HTN). Therewere no statistically significant differences in ambulatory day time systolic BP(130.71 mmHg vs. 128.88 mmHg), and night time ambulatory systolic BP(129.03 mmHg vs. 136.68 mmHg) between diabetic HTN and non-diabetic HTN.Diabetic HTN had a significantly greater day ambulatory systolic and diastolic BPvariability than non-diabetic HTN (4.80 mmHg vs. 4.18 mmHg, p < 0.05; 3.64mmHg vs. 2.80 mmHg, p < 0.05, respectively) and diabetic HTN had asignificantly greater night systolic and diastolic BP variability than non-diabeticHTN (4.99 mmHg vs. 3.88 mmHg, p < 0.05; 3.39 mmHg vs. 2.82 mmHg, p <0.05, respectively). Conclusion: These results demonstrate that BP variability is increased in diabetichypertensive. It is noted that fasting blood glucose level were found to be raised inpatients with increased BP variability. Key Words: Ambulatory blood pressure, Variability in blood pressure
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Papers by Nauman Ali