96 research outputs found
ON THE DIOPHANTINE EQUATION
In this paper, we have discussed the Diophantine equationi, for different values of m and are consecutive positive integers. 
Antidiarrheal pill in the airway
Pill aspiration depicts an unusual type of foreign body aspiration necessitating a discrete diagnostic and therapeutic approach.1 Some pills may remain intact in the endobronchial tree for many years without causing much harm, whereas others may dissolve2 The clinical outcomes may also vary, from an asymptomatic granuloma to severe, life-threatening airway complications, depending upon the chemical properties of the pill. We report a compelling case of pill aspiration in a healthy patient.
Cutaneous Cryptococcosis: a marker of life threatening disseminated cryptococcosis in HIV AIDS
Cryptococcosis is an opportunistic infection caused by a ubiquitous encapsulated yeast, Cryptococcus neoformans. Affects 5 – 10 % of patients with HIV worldwide. Disseminated cryptococcosis is one of the AIDS defining criteria and the most common cause of life threatening meningitis. Upto 20% of patients with disseminated disease can have skin involvement. Cutaneous lesions in disseminated cryptococcosis are seldom pathognomonic and portent neurological involvement. The significance of skin lesions may provide the first evidence of dissemination and indicate a poor prognosis, however, earlier recognition and treatment would improve survival. Herein we report a case of cryptococcal meningitis with skin lesions in a HIV seropositive patient
Electrical and Magnetic behaviour of PrFeAsO0.8F0.2 superconductor
The superconducting and ground state samples of PrFeAsO0.8F0.2 and PrFeAsO
have been synthesised via easy and versatile single step solid state reaction
route. X-ray & Reitveld refine parameters of the synthesised samples are in
good agreement to the earlier reported value of the structure. The ground state
of the pristine compound (PrFeAsO) exhibited a metallic like step in
resistivity below 150K followed by another step at 12K. The former is
associated with the spin density wave (SDW) like ordering of Fe spins and later
to the anomalous magnetic ordering for Pr moments. Both the resistivity
anomalies are absent in case of superconducting PrFeAsO0.8F0.2 sample. Detailed
high field (up to 12Tesla) electrical and magnetization measurements are
carried out for superconducting PrFeAsO0.8F0.2 sample. The PrFeAsO0.8F0.2
exhibited superconducting onset (Tconset) at around 47K with Tc({\rho} =0) at
38K. Though the Tconset remains nearly invariant, the Tc({\rho} =0) is
decreased with applied field, and the same is around 23K under applied field of
12Tesla. The upper critical field (Hc2) is estimated from the Ginzburg Landau
equation (GL) fitting, which is found to be ~ 182Tesla. Critical current
density (Jc) being calculated from high field isothermal magnetization (MH)
loops with the help of Beans critical state model, is found to be of the order
of 103 A/cm2. Summarily, the superconductivity characterization of single step
synthesised PrFeAsO0.8F0.2 superconductor is presented.Comment: 15 Pages Text + Fig
Covishield vaccine experience in a health care setting
Background: SARS-CoV-2 pandemic has affected the whole world and India is one among the most affected countries. Vaccination is the most important tool to halt this pandemic and vaccine hesitancy unfortunately derails vaccination drive. Vaccine hesitancy among people is mainly due to concerns about vaccine safety! This study was done to assess adverse effects of Covishield vaccine among health care workers in a single health care organization.Methods: All the vaccine recipients were requested to answer a questionnaire with demographic details and various side effects following both the doses of Covishield vaccination.Results: About 665 employees responded to the questionnaire and the most common adverse reaction following Covishield vaccine was injection site pain, which was reported by 63% of vaccinees after first dose of vaccine.Conclusions: Covishield vaccine is relatively safe and incidence of major adverse events are rare following vaccination
Regional characterization of pigeonpea sterility mosaic disease and exploring broad-based resistance
Pigeonpea sterility mosaic disease (SMD) caused by Pigeonpea sterility mosaic virus (PPSMV) is a serious threat to pigeonpea production in the Indian-subcontinent. Recent reports on the possible existence of two different viruses associated with the SMD further complicate the etiology of this difficult to manage viral disease. In this regard, a comprehensive and systematic survey was taken up across several pigeonpea growing areas in southern India to know the disease prevalence and variability in virus isolates. Further, selected pigeonpea elite genotypes were screened in different locations for their broad-based resistance. Results indicate huge variation in SMD incidence among the surveyed states. The highest disease incidence (9.38 percent) was observed in Karnataka, followed by Tamil Nadu state with 8.44 per cent incidence. Andhra Pradesh and Telangana states recorded disease incidences of 4.51 and 2.08 per cent respectively. Samples collected from Patancheru location and tested using viral-specific RNA-3 segment primers were all positive for both the viruses. However, one of the samples collected from Bengaluru location and four samples from Coimbatore location had a positive reaction for PPSMV-2 only. In order to identify broad-based resistance to SMD, 20 pigeonpea genotypes were screened in three different locations (Patancheru, Bengaluru and Coimbatore) in southern-India during rainy seasons of 2017 and 2018. Among them, ICPL- 16078, ICPL-16086 and ICPL-16087 showed resistance reaction ((≤10 % incidence) in all the three locations, whereas, ICPL-16072, ICPL-16077 and ICPL-16083 showed resistance to Patancheru and Coimbatore isolates but highly susceptible (≥40 % incidence) to Bengaluru isolate
Intriguing complex magnetism of Co in RECoAsO (RE=La, Nd and Sm)
We synthesized bulk polycrystalline samples of RECoAsO (RE=La, Nd and Sm) by
solid state reaction route in an evacuated sealed quartz tube. All these
compounds are crystallized in a tetragonal structure with space group P4/nmm.
The Co, in these compounds is in itinerant ferromagnetic state with its
paramagnetic moment above 1.5 microB and the same orders ferromagnetically (FM)
with small saturation moment of around 0.20 microB below say 80K. This bulk
intrinsic magnetism of Co changes dramatically when nonmagnetic La is changed
by magnetic Sm and Nd. Although the itinerant ferromagnetism occurs below
80-100K with small saturation moment, typical anti-ferromagnetic (AFM)
transitions (TN1, TN2) are observed at 57K and 45K for Sm and at 69K and 14K
for Nd. The transition of Co spins from FM to AFM, for magnetic Sm and Nd in
RECoAsO is both field and temperature dependent. For applied fields below
100Oe, both TN1 and TN2 are seen, with intermediate fields below 1-2kOe only
TN1 and above say 5kOe the AFM transition is not observed. This is evidenced in
isothermal magnetization (MH) plots as well. It is clear that Sm/Nd magnetic
moments interact with the ordered Co spins in adjacent layer and thus
transforms the FM ordering to AFM. All the studied compounds are metallic in
nature, and their magneto-transport R(T)H follows the temperature and field
dependent FM-AFM transition of ordered Co spins.Comment: 11 pages text + Figs: Queries to - [email protected]
(www.freewebs.com/vpsawana
Synthesis and Characterization of Excess Magnesium MgB2 Superconductor under Inert Carbon Environment
The structural, transport and magnetic properties of MgB2 superconductor
heavily blended with Mg is studied. The samples are synthesized with a new
approach in both, pressed carbon environment and in flowing argon. The excess
magnesium used is observed to play dual role: one being the prevention of Mg
losses during the synthesis process and hence maintaining the stoichiometry of
MgB2 phase, and second being the formation of Mg milieu probably all around the
MgB2 grains to give a ductile and dense structure. Excess Mg also improves the
grain connectivity by going in to the pores and there by minimizing the
insulating junctions.Comment: 21 pages Text + Figs, comments/auggestions
([email protected]) (www.freewebs.com/vpsawana
Structural and Magnetic Properties of Co1-xFexSr2YCu2O7 compounds
Here we study the structural and magnetic properties of the CoFeSr2YCu2O7
compound with x = 0.0 to 1.0. X-ray diffraction patterns and simulated data
obtained from Rietveld refinement of the same indicate that the iron ion
replacement in CoFeSr2YCu2O7 induces a change in crystal structure. The
orthorhombic Ima2 space group structure of Co-1212 changes to tetragonal P4/mmm
with increasing Fe ion. The XPS studies reveal that both Co and Fe ions are in
mixed states for the former and in case of later.Although none of the studied
as synthesized samples in CoFeSr2YCu2O7 are superconducting, the interesting
structural changes in terms of their crystallisation space groups and the weak
magnetism highlights the rich solid state chemistry of this class of materials.Comment: 20 pages of Text+Figs: comments/suggestions welcome
([email protected]
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