Publications by authors named "Kulbir Singh"

The TiO nanocomposite efficiency was determined under optimized conditions with activated carbon to remove ammoniacal nitrogen (NH-N) from the leachate sample. In this work, the facile impregnation and pyrolysis synthesis method was employed to prepare the nanocomposite, and their formation was confirmed using the FESEM, FTIR, XRD, and Raman studies. In contrast, Raman phonon mode intensity ratio I/I increases from 2.

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Introduction: Aim of radiotherapy is precise dose delivery with objective of achieving maximum local control and minimal toxicity by decreasing dose to organ at risk (OAR).This aim can be achieved by technologies like intensity-modulated radiotherapy (IMRT) and volumetric arc therapy. However, later offers comparable or even better plan quality with shorter treatment time.

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More than six and half million people have died as a result of the COVID-19 pandemic till Dec 2022. Vaccination is the most effective means to prevent mortality and infection attributed to COVID-19. Identifying public attitudes and perceptions on COVID-19 vaccination is essential to strengthening the vaccination programmes.

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Background And Objectives: Treatment of hepatocellular carcinoma (HCC) with portal vein tumor thrombus (PVTT) is very challenging with poor outcome. In this situation, radiotherapy has become an alternative treatment modality, more precisely due to advances in radiation techniques. The goal of our study is to do analysis of these patients treated with rapid arc image-guided technology (RA-IGRT) at our institution.

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This research focused on the application of a fixed bed column filled with immobilized titanium oxide-loaded almond shell carbon (TiO@ASC) for the treatment of leachate. The adsorption performance of synthesized TiO@ASC in fixed bed column is analyzed using adsorption experiments and modeling study. The characteristics of synthesized materials are determined by several instrumental techniques like BET, XRD, FTIR, and FESEM-EDX.

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Background: The standard treatment for cervical cancer is chemoradiation therapy. Pelvic radiation is associated with higher dose to bone marrow (BM) causing interrupted treatment due to haematologic toxicity with inferior outcomes. This study aims to evaluate rapid arc technique in sparing pelvic BM and dosimetric parameters for pelvis V5GY, V10GY, V20GY, V30GY, and V40GY dose.

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A defected ground antenna with dielectric reflector is designed and investigated for breast tumour diagnosis. Ultra-wide band resonance (3.1 to 10.

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Micelle formation enthalpies (Δ values) have been calorimetrically determined at 298 K for three sets of mixed zwitterionic/cationic gemini systems consisting of -dodecyl-,-dimethyl-3-ammonio-1-propanesulfonate (ZW3-12) and a series of structurally related gemini surfactants, the ,'-bis(dimethyldodecyl)-α,ω-alkanediammonium dibromide (12--12) systems. From the experimental and the estimated ideal micelle formation enthalpies, the excess enthalpies were obtained. The degrees of nonideality of the interaction in the mixed micelle ( ) from our previous work was used along with the excess enthalpy values to determine excess thermodynamic quantities of the surfactants in the mixed system according to Regular Solution Theory (RST) and Motomura's theory.

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Critical micelle concentration (cmc) values were determined for the mixed zwitterionic/cationic gemini systems of N-dodecyl- N, N-dimethyl-3-ammonio-1-propanesulfonate (ZW3-12)/ N, N'-bis(dimethyldodecyl)-α,ω-alkanediammonium dibromide (12-s-12) systems. The cmc values for the mixed systems were determined through conductivity measurements. The degree of nonideality of the interaction in the mixed micelle (β), for each system, was determined according to Rubingh's nonideal solution theory.

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Neural stem cell (NSC) cultures have been considered technically challenging for time-lapse analysis due to high motility, photosensitivity, and growth at confluent densities. We have tested feasibility of long-term live-cell time-lapse analysis for NSC migration and differentiation studies. Here, we describe a method to study the dynamics of cell cycle, migration, and lineage selection in cultured multipotent mouse or human NSCs using single-cell tracking during a long-term, 7-14 day live-cell time-lapse analysis.

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There is an immediate need to validate the authenticity of digital images due to the availability of powerful image processing tools that can easily manipulate the digital image information without leaving any traces. The digital image forensics most often employs the tampering detectors based on JPEG compression. Therefore, to evaluate the competency of the JPEG forensic detectors, an anti-forensic technique is required.

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Background: Recent studies have suggested that catheter-directed thrombolysis (CDT) reduces development of post-thrombotic syndrome (PTS). Ultrasound-assisted CDT (USCDT) might enhance the efficiency of thrombolysis. We aimed to compare USCDT with CDT on efficacy, safety, development of PTS, and quality of life after long-term follow-up.

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Swyer-James-MacLeod syndrome is a radiological entity characterised by hyperlucency of one or more lobes or of the entire lung associated with decreased number and diameter of ipsilateral peripheral pulmonary vessels resulting in difficult visibility of the arterial network, and unobstructed bronchial system. We report the case of a 12-year-old girl who presented with chief complaint of pain in the chest. Chest radiograph (postero-anterior view) showed hyperlucent left lung field with increased lung volume and shift of the mediastinum to the right side.

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Idopathic pulmonary artery aneurysm (PAA) is a rare lesion. Clinical experience with this condition is limited and current knowledge is mainly derived from autopsy findings. We report a patient who came to us with complaints of chest pain, breathlessness on exertion and pedal oedema and was diagnosed to have PAA.

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In this article, we report additive-induced micellar growth and rheology modification for mixtures of anionic (sodium dodecyl sulfate, SDS) and zwitterionic (N-alkylated glycine derivative, Empigen BB or EBB) surfactants. Two nonaromatic hydrotropic salts (hexyltrimethylammonium bromide, C6TAB, and/or dibutylenebis(dimethylbutylammonium bromide), 4-4-4) are used as novel additives to induce micellar growth in these systems. Nuclear magnetic resonance (NMR), photon correlation spectroscopy (PCS), transmission electron microscopy (TEM), the Weissenberg effect, and rheology measurements were employed to assess mixed micelle formation, micellar growth, and rheology modifications.

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Objective: The Assessment of SpondyloArthritis international Society (ASAS) classification criteria for axial spondyloarthritis (SpA) allow SpA classification of HLA-B27-positive patients if ≥2 specific clinical SpA features are present. We investigated the performance of these clinical ASAS criteria in a population with a high prevalence of HLA-B27.

Methods: A total of 807 persons reporting chronic back pain (CBP) lasting for >4 weeks during a population survey underwent a clinical, laboratory, and radiologic evaluation.

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The solubilization of four phenolic antioxidants, namely p-hydroxybenzoic acid (PHBAA), syringic acid, sinapic acid, and quercetin in micelles of an ethylene oxide (EO)-propylene oxide (PO) triblock copolymer Pluronic® P104 (EO27-PO61-EO27, PPO mol wt=3540, % PEO=40) was examined at different temperatures, pHs, and in the presence of sodium chloride. The nano-size core-shell micelles of P104 characterized by dynamic light scattering had hydrodynamic diameter of about 18-20 nm with low polydispersity. Antioxidants induced micellization and micellar growth were observed.

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Objective: The pathogenesis of abdominal aortic aneurysm (AAA) formation is poorly understood. We investigated the relationship between carotid, femoral, and coronary atherosclerosis and abdominal aortic diameter, and whether atherosclerosis was a risk marker for AAA.

Methods And Results: Ultrasound of the right carotid artery, the common femoral artery, and the abdominal aorta was performed in 6446 men and women from a general population.

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Background: In a population-based study in Tromsø, Norway, the authors assessed whether an abdominal aortic aneurysm (AAA) or the maximal infrarenal aortic diameter in a non-aneurismal aorta influence total and cardiovascular disease (CVD) mortality.

Methods: A total of 6640 men and women, aged 25-84 years, were included in a 10-year mortality follow-up: 345 subjects with a diagnosed AAA and 6295 subjects with a non-aneurismal aorta. Non-aneurismal aortic diameter and prevalent AAAs were categorized into seven groups.

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Traditional anticoagulant treatment of deep venous thrombosis (DVT) in the upper extremities (UEDVT) is associated with a relatively high incidence of postthrombotic syndrome (PTS). Catheter-directed thrombolysis (CDT) for UEDVT would provide efficient thrombolysis with less subsequent PTS than during traditional anticoagulation. Primary efficacy, complications, and long-term results after CDT are reported in a retrospective cohort (2002-2007) of patients (n = 30) with DVT in the upper extremities.

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A simple and effective method for the formation of stable multilamellar vesicles is reported as a potential application of ionic liquid materials (IL's) and as replacements for conventional surfactants used in such applications. The methodology is based on the various approaches for the formation of vesicles from oppositely charged surfactants. Photon correlation spectroscopy (PCS) and transmission electron microscopy (TEM) have been used to estimate the size of the aggregates; the TEM studies have also revealed morphological differences in the self-assembled systems with changing ionic liquid material.

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Background: Abdominal aortic aneurysm is an asymptomatic condition with a high mortality rate related to rupture.

Methods And Results: In a cohort of 2035 men and 2310 women in Tromsø, Norway, who were 25 to 82 years old in 1994, the authors identified risk factors for incident abdominal aortic aneurysm over the next 7 years. The impact of smoking was studied in particular.

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In a cross-sectional, population-based study in Tromsø, Norway, the authors investigated correlations between lumen diameter in the right common carotid artery (CCA) and the diameters of the femoral artery and abdominal aorta and whether CCA lumen diameter was a risk factor for abdominal aortic aneurysm (AAA). Ultrasonography was performed in 6,400 men and women aged 25-84 years during 1994-1995. An AAA was considered present if the aortic diameter at the level of renal arteries was greater than or equal to 35 mm, the infrarenal aortic diameter was greater than or equal to 5 mm larger than the diameter of the level of renal arteries, or a localized dilation of the aorta was present.

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Mixed micelle formation of binary cationic gemini (12-s-12, s=4, 6) and zwitterionic (N-dodecyl-N,N-dimethylglycine, EBB) surfactants has been investigated by measuring the surface tension of aqueous solution as a function of total concentration at various pH values from acidic to basic, under conditions of 298.15 K and atmospheric pressure. The results were analyzed by applying regular solution theory (RST), and Motomura's theory, which allows for the calculation of the excess Gibbs energy of micellization purely on the basis of thermodynamic equations.

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