Publications by authors named "Praveen V"

Introduction: Adolescent females in India particularly from rural areas indicate sparse sexual and reproductive health (SRH) information and are at risk of unfavourable sexual and reproductive health outcomes.

Objectives: The study was primarily intended to assess the effect of structured interventional education on awareness and practices of school-going adolescent girls about sexual and reproductive health.

Methods: This was an interventional study comprising of interactive strategies, namely peer-led approach, flipped learning, skit, scenario-based discussion and puppetry.

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  • * The study presents a coronene-dipeptide conjugate (Cr-o-FF) that self-assembles into two distinct stable 1D supramolecular polymorphs (Agg 1 and Agg 2f) in the same solvent and concentration, influenced by the method of solvent addition.
  • * Agg 1 forms through a classical nucleation mechanism with monomers, while Agg 2f arises from preorganized oligomers in a nonclassical process, highlighting the importance of prenucleation clusters in the complexity and polymorphism of these
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  • The study emphasizes the importance of both macromolecule-macromolecule and macromolecule-HO interactions in the liquid-liquid phase separation (LLPS) of biopolymers, highlighting a less recognized role of hydrated supramolecular structures in synthetic molecules.
  • It reports on the LLPS that occurs when positively charged hydrated supramolecular vesicles interact with a dianionic chiral molecule, leading to the formation of droplets that serve as nucleation precursors.
  • These findings demonstrate that the hydrophobic interactions in water, influenced by LLPS, can help create advanced functional materials, with implications for the design of new materials in aqueous environments.
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We analyzed the issue of a young woman who wanted our opinion regarding uncontrolled hypertension. Her hypertension was discovered to have a highly unusual origin, but it is fairly prevalent in nations like India. A 19-year-old woman who complained of blurred vision was presented to an ophthalmologist, who diagnosed her with grade IV hypertensive retinopathy.

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Maintaining lipid asymmetry across membrane leaflets is critical for functions like vesicular traffic and organelle homeostasis. However, a lack of molecular-level understanding of the mechanisms underlying membrane fission and fusion processes in synthetic systems precludes their development as artificial analogs. Here, we report asymmetry induction of a bilayer membrane formed by an extended π-conjugated molecule with oxyalkylene side chains bearing terminal tertiary amine moieties (BA1) in water.

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Carbon nanodots, the luminescent nanoparticles of carbon with size restriction below 10 nm, have attracted inordinate attention in materials science due to their widespread applications in optoelectronic and biological fields. Low toxicity and facile synthesis pathways render them favourites in the above-mentioned areas in the context of green chemistry. This work presents fine applications of -phenylenediamine-derived carbon nanodots (PD-CNDs) achieved a facile one-pot hydrothermal method.

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Background: Charcot arthropathy (CA) is a progressive noninfectious inflammatory disease that causes irreversible destruction to pedal architecture in diabetic neuropathy (DN) patients. The debilitating prognosis demands early detection to prevent the development and progression of this disorder. Dysregulated and persistent production of inflammatory cytokines is reported as the key element in initiating osteoclastogenesis in CA.

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A mechanistic understanding of the principles governing the hierarchical organization of supramolecular polymers offers a paradigm for tailoring synthetic molecular architectures at the nano to micrometric scales. Herein, the unconventional crystal growth mechanism of a supramolecular polymer of superbenzene(coronene)-diphenylalanine conjugate (Cr-FF ) is demonstrated. 3D electron diffraction (3D ED), a technique underexplored in supramolecular chemistry, is effectively utilized to gain a molecular-level understanding of the gradual growth of the initially formed poorly crystalline hairy, fibril-like supramolecular polymers into the ribbon-like crystallites.

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One of the bottlenecks associated with supramolecular polymerization of functional π-systems is the spontaneous assembly of monomers leading to one- or two-dimensional (1D or 2D) polymers without control over chain length and optical properties. In the case of supramolecular copolymerization of monomers that are structurally too diverse, preferential self-sorting occurs unless they are closely interacting donor-acceptor pairs. Herein, it is established that the spontaneous 1D polymerization of a phenyleneethynylene (PE) derivative and the 2D polymerization of a Bodipy derivative (BODIPY) can be controlled by copolymerizing them in different ratios, leading to unusual spindle-shaped structures with controlled aspect ratio, as evident by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and confocal laser scanning microscopy (CLSM) studies.

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  • The study investigates differentiated thyroid carcinoma (DTC) in a cohort from Kerala, India, highlighting differences from data in developed regions.
  • A retrospective analysis of 944 patients revealed that the most common type was classical papillary thyroid carcinoma (cPTC), with significant instances of metastasis at diagnosis, particularly in older patients and those with larger tumors.
  • The findings indicate a high prevalence of indirect detection of papillary thyroid microcarcinomas (PTMC) and emphasize the need for improved early detection strategies in DTC to reduce the risk of advanced cases at diagnosis.
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Odontomas are the most commonly occurring odontogenic tumor, and earlier they were considered developmental anomaly as the morphodifferentiation of ameloblast does not occur in odontomas. Odontomas are considered hamartoma rather than true neoplasms as histologically they contain odontogenic tissues which are native to the oral cavity. These odontomas are usually asymptomatic and are revealed in radiographic examination but can also present with over-retained deciduous teeth and malocclusion and with other local complications such as infection.

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Excited state properties such as emission, exciton transport, electron transfer, etc., are strongly dependent on the shape, size and molecular arrangement of chromophore based supramolecular architectures. Herein, we demonstrate creation and control of distinct supramolecular energy landscapes for the reversible control of the excited-state emission processes through cascade energy transfer in chromophore assemblies, facilitated by an unprecedented solvent effect.

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Objectives: 1. To estimate the prevalence of latent tuberculosis infection among household contacts of sputum positive pulmonary tuberculosis patient receiving DOTS chemotherapy. 2.

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Background And Aims: Liver transplantation has become an effective therapy for patients with end-stage liver disease. The risk of new-onset diabetes after transplantation (NODAT) and posttransplant metabolic syndrome (PTMS) is high among patients after liver transplantation. These are thought to be associated with increased risks of graft rejection, infection, cardiovascular disease, and death.

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Since various helical supramolecular polymers became available, their application to molecular chirality recognition have been anticipated but not extensively studied. So far, only a few examples of chiral reactions have been reported, but none for chiral separation. Here, we report the application of a helical supramolecular polymer to the enantio-separation of chiral guest molecules.

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Context: The steroidogenic enzyme aromatase (CYP19A1) is required for estrogen biosynthesis from androgen precursors in the ovary and extragonadal tissues. The role of aromatase, and thus estrogens, is best illustrated by genetic variations of the gene leading to aromatase deficiency or excess.

Objective: The objective of this work is to characterize novel variants.

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Molecules and materials derived from self-assembled extended π-systems have strong and reversible optical properties, which can be modulated with external stimuli such as temperature, mechanical stress, ions, the polarity of the medium, and so on. In many cases, absorption and emission responses of self-assembled supramolecular π-systems are manifested several times higher when compared with the individual molecular building blocks. These properties of molecular assemblies encourage scientists to have a deeper understanding of their design to explore them for suitable optoelectronic applications.

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Introduction: Charcot arthropathy (CA) is non-infective, chronic destructive condition affecting the pes architecture of long standing diabetic patients with neuropathy. Even though several theories have emerged to disclose its pathogenesis, inflammatory cytokine induced osteoclastogenesis stands as the chief culprit. Studies on micro-architecture of foot bones of acute stage CA patients, describes mainly destructive phase of bone remodelling.

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Cyano-substituted p-phenylenevinylene (R-1) aggregates exhibiting fluorescence and Raman spectroscopic responses towards CO2 are described. The aggregation-induced emission (AIE) as well as the aggregation-enhanced Raman scattering (AERS) of R-1 in aqueous conditions was reduced in the presence of a small amount of CO2, which enabled its easy and fast bimodal detection in different analytical samples.

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Ionic covalent organic nanosheets (iCONs), a member of the two-dimensional (2D) nanomaterials family, offer a unique functional platform for a wide range of applications. Herein, we explore the potential of an ethidium bromide (EB)-based covalent organic framework (EB-TFP) that self-exfoliates in water resulting in 2D ionic covalent organic nanosheets (EB-TFP-iCONs) for the selective detection of double-stranded DNA (dsDNA). In an aqueous medium, the self-exfoliated EB-TFP-iCONs reassemble in the presence of dsDNA resulting in hybrid EB-TFP-iCONs-DNA crystalline nanosheets with enhanced fluorescence at 600 nm.

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Rational understanding of the structural features involving different noncovalent interactions is necessary to design a liquid crystal (LC) or an organogelator. Herein, we report the effect of the number and positions of alkoxy chains on the self-assembly induced physical properties of a few π-conjugated molecules. For this purpose, we designed and synthesized three -symmetrical molecules based on oligo(-phenylenevinylene), -.

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Purpose: To assess awareness, barriers, and misconceptions related to eye donation in people with corneal disease as compared to controls in a population setting.

Materials And Methods: A population-based study was conducted in 25 randomly selected clusters of Rural Gurgaon, Haryana, India, as part of the CORE (Cornea Opacity Rural Epidemiological) study. In addition to ophthalmic examination, knowledge and perceptions regarding eye donation were assessed through a validated questionnaire.

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Aims: Available literature on the prevalence of Charcot arthropathy (CA) represents mainly Western population. No study has been reported from India so far. Hence we attempted to study the prevalence of CA in patients with type 2 diabetes mellitus and severe peripheral neuropathy (T2DMPN), belonging to Indian population amongst whom type 2 diabetes is on the rise in alarming proportions.

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Cyclonic atmospheric vortices of varying intensity, collectively known as low-pressure systems (LPS), travel northwest across central India and produce more than half of the precipitation received by that fertile region and its ∼600 million inhabitants. Yet, future changes in LPS activity are poorly understood, due in part to inadequate representation of these storms in current climate models. Using a high-resolution atmospheric general circulation model that realistically simulates the genesis distribution of LPS, here we show that Indian monsoon LPS activity declines about 45% by the late 21st century in simulations of a business-as-usual emission scenario.

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We report an unprecedented strategy to generate and amplify near-infrared (NIR) emission in an organic chromophore by mechanical stress or gelation pathways. A greenish-yellow emitting film of π-extended , obtained from -decane, became orange-red upon mechanical shearing, with a 15-fold enhancement in NIR emission at 738 nm. Alternatively, a DMSO gel of exhibited a 7-fold enhancement in NIR emission at 748 nm with a change in emission color from yellow to orange-red upon drying.

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