16 Result(s)

Article

Effect of inhibitor addition on the corrosion behavior of a grain boundary relaxed electrodeposited nanocrystalline Ni–P alloy

Corrosion behavior of grain boundary relaxed electrodeposited nanocrystalline Ni–P was studied in HCl media with and without the addition of inhibitor Glycine. The Ni-0.5P alloy bears a grain size of 12 nm whi...

S. P. Sethy, S. Banthia, H. T. Padmaganesan, P. Das… in Journal of Materials Science (2024)

Article

Evaluating the Suitability of Glass Optical Fiber as a Toughening Agent in Silicon Composites Developed by Spark Plasma Sintering

This study explores the repurposing of waste glass optical fibers (SiO₂ fibers) by using them as toughening agents for silicon. The poor fracture toughness of silicon has precluded its development as a structural...

B. K. Samantaray, G. Revathi, S. R. Bakshi, S. Gollapudi in Silicon (2024)

Article

Compaction and Pressureless Sintering Characteristics of Silicon and a Silicon Composite Containing a Multicomponent Molybdenum Alloy Reinforcement

The compaction and sintering characteristics of silicon and a silicon composite containing a multi-component Molybdenum alloy (Mo₄₄Si₂₆Ta₅Zr₅Fe₃Co₁₂Y₅) as reinforcement is reported here. Compaction with different...

B. K. Samantaray, U. Kumar, E. Nandha Kumar, R. S. Kottada, G. Bartarya… in Silicon (2023)

Article

Boron Deteriorates the Thermal Stability of Nanostructured Silicon

Guided by Darling et al. model for nanostructure stability, Boron was chosen for stabilizing nanostructured silicon. The Si-4 at.% B alloy was synthesized by high energy ball milling of Si and B powders for a ...

B. K. Samantaray, G. Revathi, S. R. Bakshi, G. Bartarya, S. Gollapudi in Silicon (2023)

Article

On the Corrosion Behavior of Selective Laser-Melted Ti-6Al-4V Alloys: Role of Mesostructures, Crystallographic Texture, and Phase Fractions

The effect of microstructure on the corrosion behavior of selectively laser-melted Ti6Al4V alloys was investigated. Four different combinations of coupons were produced by varying the powder bed layer thickness, 

T. Dixit, S. P. Sethy, S. Gollapudi… in Transactions of the Indian Institute of Me… (2023)

Article

Hardness and Indentation Fracture Toughness in a Novel Silicon Composite Synthesized by Spark Plasma Sintering

A composite of 90 wt pct silicon and 10 wt pct of the multi-component Mo₄₄Si₂₆Ta₅Zr₅Fe₃Co₁₂Y₅ was synthesized using spark plasma sintering at a temperature of 1423 K and applied pressure of 75 MPa. The relative d...

B. K. Samantaray, S. R. Bakshi… in Metallurgical and Materials Transactions A (2022)

Article

Understanding creep in nanocrystalline materials

Only a limited number of creep investigations have been carried out on nanocrystalline materials to-date. These studies have remained largely inconclusive in establishing the mechanisms of creep in nanocrystal...

S. Gollapudi, K. V. Rajulapati, I. Charit… in Transactions of the Indian Institute of Me… (2010)

Article

Newtonian viscous creep in metals

All materials exhibit Newtonian viscous creep behavior at low stresses and high temperatures. We review here such creep behaviors in metals comprising of pure metals and alloys. The underlying creep mechanism(...

K. Linga Murty, S. Gollapudi, I. Charit in Transactions of the Indian Institute of Metals (2010)

Article

Differential sensitivity of naïve and subsets of memory CD4+ and CD8+ T cells to hydrogen peroxide-induced apoptosis

CD4+ and CD8+ memory T cells are identified into central and effector memory subsets, which are characterized by distinct homing patterns and functions. In this investigation, we show that naïve and central me...

S Gupta, T Young, L Yel, H Su, S Gollapudi in Genes & Immunity (2007)

Article

Increased spontaneous, tumor necrosis factor receptor- and CD95 (Fas)-mediated apoptosis in cord blood T-cell subsets from Turner's syndrome

Increased spontaneous as well as TNF-α-induced and CD95-mediated apoptosis were observed in CD4+ and CD8+ T cells from the cord blood of a patient with Turner's syndrome as compared to normal cord blood. Increase...

S Gupta, S Chiplunkar, A Gupta, S Gollapudi in Genes & Immunity (2003)

Article

Biochemical and molecular basis of thimerosal-induced apoptosis in T cells: a major role of mitochondrial pathway

The major source of thimerosal (ethyl mercury thiosalicylate) exposure is childhood vaccines. It is believed that the children are exposed to significant accumulative dosage of thimerosal during the first 2 ye...

S Makani, S Gollapudi, L Yel, S Chiplunkar, S Gupta in Genes & Immunity (2002)

Article

P-glycoprotein (encoded by multidrug resistance genes) is not required for interleukin-2 secretion in mice and humans

P-glycoprotein (encoded by multidrug resistance genes), a member of the ATP-binding cassette transporter protein superfamily, has been shown to play a role in the secretion of cytokines. This conclusion was ba...

S Gollapudi, C Kim, S Gupta in Genes & Immunity (2000)

Article

TNF-α-induced apoptosis in neonatal lymphocytes: TNFRp55 expression and downstream pathways of apoptosis

Previously we have shown decreased Fas-mediated apoptosis in cord blood lymphocyte subsets. In this study, we compared tumor necrosis factor (TNF)-α-induced apoptosis in T lymphocytes and their subsets between...

S Aggarwal, S Gollapudi, L Yel, AS Gupta, S Gupta in Genes & Immunity (2000)

Article

Probenecid reverses multidrug resistance in multidrug resistance-associated protein-overexpressing HL60/AR and H69/AR cells but not in P-glycoprotein-overexpressing HL60/Tax and P388/ADR cells

S. Gollapudi, Choong H. Kim, Bich-Ngoc Tran… in Cancer Chemotherapy and Pharmacology (1997)

Article

Scientific Proceedings Second International Symposium on Cytostatic Drug Resistance

Bridget T. Hill, L. K. Hosking, S. McClean… in Journal of Cancer Research and Clinical On… (1991)