Atul Saxena

Field Crops Research Institute

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K.K. Dwivedi

Indian Grassland and Fodder Research Institute

Mahesh Ram

North Eastern Hill University

Nihal Limbu

North Eastern Hill University

Dipangkar Kalita

North Eastern Hill University

Bimal Kumar Jha

National Institute of Advanced Manufacturing Technology

S. Ghosh

Indian Institute of Science Education and Research Kolkata

S. K. Chaudhuri

Steel Authority of India Limited

B. K. Nayak

Homi Bhabha National Institute

A. Shankar

North Bengal University

Raju Kalita

North Eastern Hill University

Cooperative Institutions

European Organization for Nuclear Research

Steel Authority of India Limited

Bhabha Atomic Research Centre

Australian National University

Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Istituto Nazionale di Fisica Nucleare

Istituto Nazionale di Fisica Nucleare, Sezione di Bari

CEA Paris-Saclay

Homi Bhabha National Institute

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Study of half metallicity, structural and mechanical properties in inverse Heusler alloy Mn₂ZnSi_(1−x)Ge_x and a superlattice

RSC Advances (2019)

Mahesh Ram Atul Saxena Abeer E. Aly A. Shankar

The electronic and magnetic properties of Mn₂ZnSi_(1−x)Ge_x (x = 0.0, 0.125, 0.25, 0.375, 0.5, 0.625, 0.75, 0.875, and 1.0) inverse Heusler alloys and Mn₂ZnSi/Mn₂ZnGe superlattice have been investigated using first-principles calculations.

10.1039/c9ra06903h

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Citations (9)

Radon Concentration in Chandigarh, India using LR-115 detector

Journal of Physics Conference Series (2020)

J. P. Gewali Manmeet Singh Navneet Kaur K. Kaur Ankush Thakur

Abstract Radon monitoring has become a global phenomenon due to its health hazards. Mostly LR-115 detectors are being used to obtain the concentration levels of radon/thoron and their daughters. Studies have reported of the total exposure of radon to human being indor radon accounts for more than 50%. So study of radon in different region gains significance. In this paper we have studied the indoor radon concentration in various localities of Chandigarh a union territory and capital town of Punjab, India. We also compared the result with all India radon concentration level and WHO/UNSCEAR effective dose limit.

Capital city

Radon exposure

10.1088/1742-6596/1531/1/012039

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Citations (1)

Track lengths of heavy ions in CR-39 and ZnP-glass detectors

International Journal of Radiation Applications and Instrumentation Part D Nuclear Tracks and Radiation Measurements (1986)

K.K. Dwivedi Atul Saxena P. Crombach E. Reichwein G. Fiedler

Nuclear track

Stopping power

CR-39

Ion track

10.1016/1359-0189(86)90579-0

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Citations (15)

Occurrence of two-stage hardening in C-Mn steel wire rods containing pearlitic microstructure

IOP Conference Series Materials Science and Engineering (2016)

Balbir Singh Gadadhar Sahoo Atul Saxena

The 8 and 10 mm diameter wire rods intended for use as concrete reinforcement were produced/ hot rolled from C-Mn steel chemistry containing various elements within the range of C:0.55-0.65, Mn:0.85-1.50, Si:0.05-0.09, S:0.04 max, P:0.04 max and N:0.006 max wt%. Depending upon the C and Mn contents the product attained pearlitic microstructure in the range of 85-93% with balance amount of polygonal ferrite transformed at prior austenite grain boundaries. The pearlitic microstructure in the wire rods helped in achieving yield strength, tensile strength, total elongation and reduction in area values within the range of 422-515 MPa, 790-950 MPa, 22-15% and 45-35%, respectively. On analyzing the tensile results it was revealed that the material experienced hardening in two stages separable by a knee strain value of about 0.05. The occurrence of two stage hardening thus in the steel with hardening coefficients of 0.26 and 0.09 could be demonstrated with the help of derived relationships existed between flow stress and the strain.

Elongation

Hardening (computing)

Rod

Strain hardening exponent

Flow stress

10.1088/1757-899x/149/1/012066

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Enhanced electronic and thermoelectric properties of p-type doped filled skutterudites RFe4Sb12 (R = Pr, Nd)

Journal of Applied Physics (2020)

Nihal Limbu Mahesh Ram H. Joshi Atul Saxena S. Bin Omran

A semimetallic type of electronic profile has been predicted for RFe4Sb12 (R = Pr, Nd) from a first-principles investigation, where the presence of a small energy bandgap above the Fermi energy level (EF) is a key feature. The EF lies at the top of the valence band and it is crossed by a single band more than twice, which improves the band concentration and electronic specific heat as reflected by the high Seebeck coefficient. The doping of a heavy lanthanide atom at the center of the cage formed by pnictogen atoms has a significant effect on the electronic structure that enhances the Seebeck coefficient and the thermoelectric power factor. The heavy atom at the center also dampens the lattice vibration and lowers the lattice thermal conductivity. The Nd-doped system shows an enhanced Seebeck coefficient with the highest power factor among the sample alloys. Moreover, due to significant reduction in the lattice thermal conductivity from 2.46 W/m K to 0.54 W/m K, a maximum ZT value of ∼1.11 at 800 K has been observed for an Nd-doped system. The covalent nature of PrFe4Sb12, Pr-doped NdFe4Sb12, and Nd-doped PrFe4Sb12 and the ionic nature of NdFe4Sb12 have been confirmed, where Pr-doped NdFe4Sb12 is the stiffest and a highly rigid material with strong bonding forces among the constituent atoms. The results presented in this manuscript open the possibilities for further exploration of center atom-doped filled skutterudites with improved Seebeck coefficient and reduced lattice thermal conductivity, which are promising materials for thermoelectric applications

Ionic radius

10.1063/5.0019797

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Citations (7)

Development of API X70 Grade Hot Rolled (HR) Coils for Spiral Welded (SW) Pipes

International Journal of Metallurgical Engineering (2016)

Satyam Shukla Santosh Kumar Saikat K. De A. K. Bhakat Atul Saxena

In this paper, efforts made at BSL, SAIL towards developmental of API X70 grade HR coils intended for SW pipes, have been presented. Two trial heats with Nb-Cr-V and Nb-Cr-V-Mo based chemistry aiming (a) ferrite-pearlite and (b) ferrite-pearlite-bainite microstructures respectively were made and cast into 1400 x 210 mm slabs. These trial slabs were processed under suitably designed process variables. Acicular ferrite microstructure engineered through Nb-V-Cr-Mo alloy design has been found more suitable to achieve requisite strength level (in 45° direction) and impact toughness properties consistently in API X70 HR coils. All the properties requirements like, Yield Strength (YS): 515-536 MPa, Ultimate Tensile Strength (UTS): 590-610 MPa, Percentage elongation (%El) in 50mm GL: 25-35%, YS/UTS: 0.86-0.88, Hardness: 184-218 HV10 and Impact toughness (at -5°C): 305-328 J were successfully achieved in HR coils of Nb-V-Cr-Mo heat. Performance trial for three number of coils of Nb-V-Cr-Mo heat were conducted at customer’s end. The coils were rolled into 28 mm OD x 7.1 mm thick Helical Submerged Arc Welded (HSAW) pipes and forty numbers of pipes were successfully made. Mechanical properties requirements like YS : 511-550 MPa, UTS: 589-646 MPa, %El: 34-38%, YS/UTS: 0.84-0.87), impact toughness in base (280-296 J), weld (184-196 J) and HAZ (184-236 J) and 100% shear area in Drop Weight Tear Test (DWTT) at 0°C were successfully met in all the pipes. Surface of the rolled pipes were found free from any defect. All the pipes passed the hydraulic, ultrasonic and radiography tests.

Acicular ferrite

Charpy impact test

Source

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Failure Analysis of Boiler Tubes Used in a Thermal Power Plant

Transactions of the Indian Institute of Metals (2016)

S. K. Dhua Atul Saxena Bimal Kumar Jha

Overheating (electricity)

10.1007/s12666-015-0790-7

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Citations (8)

Prediction of some physical properties in new half Heusler alloy NbAgSi

Journal of Solid State Chemistry (2022)

Dipangkar Kalita Mahesh Ram Nihal Limbu Raju Kalita Atul Saxena

Density of states

10.1016/j.jssc.2022.122999

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Citations (11)

Channeling of 1.65 GeV 132Xe in mica

International Journal of Radiation Applications and Instrumentation Part D Nuclear Tracks and Radiation Measurements (1988)

S. Ghosh Atul Saxena K.K. Dwivedi

Muscovite

Ion track

Isotropic etching

Lattice (music)

Collimated light

10.1016/1359-0189(88)90164-1

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Citations (5)

Attenuated adenosine mediated immune-dampening increases natural killer cell activity in early age-related macular degeneration

bioRxiv (Cold Spring Harbor Laboratory) (2025)

Archana Padmanabhan Nair Sayan Ghosh Vishnu Suresh Babu Praveen Machiraju Ying Xin

Non-exudative age-related macular degeneration (AMD) involves retinal pigment epithelium (RPE) dysfunction and has been linked to altered intraocular immunity. Our investigation focuses on immune cell subsets and inflammation-associated factors in the eyes with early and intermediate AMD. We observed elevated levels of activated natural killer (NK) cells and interferon-γ, concurrent with reduced myeloid-derived suppressor cells (MDSCs) and adenosine in AMD eyes. Aqueous humor from AMD patients had diminished ability to dampen NK cell activation, an effect rescued by adenosine supplementation. The Cryba1 cKO mouse model recapitulated these immune alterations, and single-cell RNA-sequencing identified NK cell-related genes and NK cell-RPE interactions. Co-culture of activated NK cells with RPE cells induced barrier dysfunction and Gasdermin-E driven pyroptosis providing a functional link relevant to AMD. These findings suggest a double-hit model where elevated immune activation and loss of immune dampening mechanisms drive AMD progression. Resetting the intraocular immune balance may be a promising therapeutic strategy for managing early and intermediate AMD.

Pyroptosis

10.1101/2025.01.22.634301

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