Five synthesized pyrazolopyridine derivatives, such as 4-(2-chloro-6-flurpphenyl)-3-methyl-6-oxo-4,5,6,7-tetrahydro-2H-pyrazolo[3,4-b]pyridine-5-carbonitrile (AP-1), 3-methyl-6-oxo-4,5,6,7-tetrahydro-2H-pyrazolo[3,4-b]pyridine-5-carbonitrile (AP-2), 3-methyl-6-oxo-4-(p-tolyl)-4,5,6,7-tetrahydro-2H-pyrazolo[3,4-b]pyridine-5-carbonitrile (AP-3), 4-(4-methoxyphenyl)-3-methyl-6-oxo-4,5,6,7-tetrahydro-2H-pyrazolo[3,4-b]pyridine-5-carbonitrile (AP-4), and...

Nowadays, the modern scientific and industrial communities demand inexpensive, energy efficient, green sustainable catalytic approaches. In this regard, polymeric graphitic carbon nitride materials (g-C3N4), a two-dimensional (2D) graphite-like structure, has drawn immense attention in organic synthesis as metal-free heterogeneous catalyst. Unlike traditional carbon-based corrosive hazardous catalyst, g-C3N4 high activity, stability, narrow band gap, non-toxic, easy preparation,...

The desire to provide universal connectivity for mobile computers and communication devices is fueling a growing interest in wireless packet networks. To satisfy the needs of data networking, Study Group 802.11 was formed under IEEE project 802 recommend an international standard WLANs. A key part MAC protocol needed support asynchronous time-bounded delivery frames. It has been proposed that unslotted CSMA/CA be basis WLAN protocols. We conduct performance evaluation transfer protocols are...

The issue of routing requests for virtual circuits in a path (VP) based asynchronous transfer mode (ATM) network is addressed. It supposed that the VPs are partitioned manner such all (VCs) making use any given VP have same traffic characteristics and quality service demands. A circuit request can be accepted only if specified loss delay bounds guaranteed cells belonging to it. After suitable simplifying assumptions about operation made, simple admission rules proposed. Routing policies then...

To lessen the quick depletion of fossil fuels and resulting environmental harm, it is necessary to investigate effective eco-friendly materials that can convert lost energy into electricity. The structural, optical, electronic, thermo-electric, thermodynamic properties novel half-Heusler (HH) material NaVTe were examined in current work using density functional theory (DFT). Birch-Murnaghan equations states used confirm structural stability HH alloy under investigation. These show compound...

The quest for efficient and sustainable green energy solutions has led to a growing interest in half Heusler alloys, particularly thermoelectric spintronic applications. This study investigates the multifaceted nature of cobalt based alloy, CoVAs, employing DFT with advanced computational techniques, such as FLAPW method. elastic, electronic, magnetic, thermodynamic, optical properties CoVAs are meticulously analyzed. Structural mechanical evaluations reveal stability brittleness under...

A simple, convenient and green synthetic protocol for the chemoselective synthesis of pyrazolo[3,4-b]pyridine derivatives via three-component reaction 3-amino-5-methylpyrazole, ethyl cyanoacetate, aldehydes catalyzed by sodium chloride under ultrasound irradiation in aqueous medium is described. The method showed remarkable selectivity over dehydrogenated pyrazolopyridines, bis-pyrazolopyridines pyrazolo[1,5-a]pyrimidine derivatives. reactions were carried out both conventional ultrasonic...

We report the dynamics of single and two collinearly colliding laser ablated plumes ZnO studied using fast imaging spectroscopic measurements. Two dimensional expanding plume temporal evolution various species in interacting zones are used to calculate front velocity, electron temperature, density plasma. The interact with each other at early stage expansion (∼20 ns) resulting an interaction zone that propagates further leading formation stagnation layer later times (>150 lateral...

We calculated the structural, electronic, mechanical and thermoelectric properties of iridium-based, newly proposed Heusler alloys Ir 2 V (In, Sn). Both have an indirect bandgap at Fermi level in spin-down channel, with metallic overlap spin-up indicating presence half-metallic behavior. The Hubbard interactions contribute to behavior these alloys. magnetic moments are estimated using Slater–Pauling formula, large values all predominant contribution from atom. stability is established by...

We report the comparative study of effect interaction nano-second and pico-second laser pulse incident on solid copper target placed in ambient air magnetic field. Larger ablation depth ∼67 μm with clean crater profile is observed case ps-laser pulses compared to ∼31 using ns-laser pulses. However, mass rate found ∼3.25×10−9g/s, roughly half that ∼6.0×10−9g/s. The electron density at very early stage (5.32×1017cm−3) 1.5 times higher than (3.45×1017cm−3) absence temperature fluctuations later...

Functionalized graphitic carbon nitride (Sg-C3N4) has been manufactured and used as a reusable catalyst for the one-pot production of various spiro-pyrano chromenes spiro indole-3,1'-naphthalene tetracyclic systems in aqueous media. An ultrasound-assisted method functionalization g-C3N4. The catalytic functionalities structural integrity were characterized via different analytical tools. site-specific role Sg-C3N4 was confirmed control experiments reaction sequences. We recognized that acts...

We report the study of carbon plasma produced using 1064 nm laser in nitrogen ambient at atmospheric pressure 2-dimensional fast imaging ablated plume, optical emission spectroscopy, and probe 532 for interferometry shadowgraphy. The dominance C2 CN molecules over ionic species later stages expanding plume is reported. observed ring structure shadowgrams change direction fringe shift from positive to negative recorded interferograms are correlated with relative abundance different as...

The isomer shifts, quadrupole splittings, and magnetic hyperfine splittings of iron in α-Fe–Be: FeBe5, α-Fe–Nb, γ-Fe–Nb, α-Fe–Ru, γ-Fe–Ru, FeTe2, α-Fe–Ir, γ-Fe–Ir alloys are measured using the Mössbauer effect. Some these studies were carried out as a function temperature range 60 to 300 °K. All systems except FeBe5 studied for first time. A possible new transition above 77 °K ϵ-phase Fe–Nb (30 at% Nb) alloy has been found. In FeTe2 reported earlier from susceptibility data is confirmed by...

We report the third harmonic generation of a nanosecond laser pulse (1.06 μm) in air ambient and presence nanoparticles from ablated carbon plasma. Significant decrease threshold multi-fold increment intensity generated is observed The due to quasi-resonant four photon process involving vibrationally excited states molecular ion nitrogen electron impact ionization pulse. Following optical emission spectroscopic observations we conclude that C2 CN plume play vital role signals.