Papers by Purnajyoti D Bhuyan
2018 IEEE 18th International Conference on Nanotechnology (IEEE-NANO), 2018
Phase change memory (PCM) is being explored as a synaptic nanodevice for scalable and low-power n... more Phase change memory (PCM) is being explored as a synaptic nanodevice for scalable and low-power neuromorphic circuits. We present a novel and lightweight method to refresh PCM cells after they saturate at their maximum conductance during the learning process. Our learning system is an event-based Restricted Boltzmann Machine with Spike Time Dependent Plasticity update rule using a modified contrastive divergence algorithm. By using our event-based neuromorphic circuit simulator and the MNIST handwritten digit dataset, we show that our refresh method reduces power consumption by decreasing the number of SET and RESET programming pulses while maintaining high learning accuracy.
2016 Pan Pacific Microelectronics Symposium (Pan Pacific), 2016
Informacje o naborze artykułów i zasadach recenzowania znajdują się na stronie internetowej Wydaw... more Informacje o naborze artykułów i zasadach recenzowania znajdują się na stronie internetowej Wydawnictwa www.wydawnictwo.ue.wroc.pl Kopiowanie i powielanie w jakiejkolwiek formie wymaga pisemnej zgody Wydawcy
電子情報通信学会総合大会講演論文集, Mar 7, 2002
2007 IEEE Symposium on VLSI Circuits, 2007
... Leland Chang, Yutaka Nakamurat, Robert K. Montoye, Jun Sawada , Andrew K. Martin:, Kiyofumi K... more ... Leland Chang, Yutaka Nakamurat, Robert K. Montoye, Jun Sawada , Andrew K. Martin:, Kiyofumi Kinoshitat, Fadi H. Gebara , Kanak B. Agarwalt, Dhruva J. Acharyya, Wilfried Haensch, Kohji Hosokawat, and Damir JamsekO IBM T JX Watson Research Center, Yorktown Heights ...
RSC Adv., 2015
This paper presents a new method for fabricating biodegradable bio-polymeric nanoparticles via a ... more This paper presents a new method for fabricating biodegradable bio-polymeric nanoparticles via a convenient one-pot strategy at room temperature under stirring conditions for application to communicable diseases.
Phytochemistry Letters, 2009
Journal of Molecular Structure, 2017
Abstract The aim of this study was to isolate and characterize bioactive secondary metabolites fr... more Abstract The aim of this study was to isolate and characterize bioactive secondary metabolites from the flora of the Indo-Burma biodiversity belt for controlling leaf blight disease of Solanum khasianum Clarke (Solanaceae) caused by Alternaria tenuissima and Alternaria alternata during commercial cultivation, the berries of which contains 1.80–3.45% solasodine, a major raw material for steroid drug industries. Three new and two white powdered compounds were extracted from Cinnamomum obtusifolium (Roxb.) Nees (Lauraceae), Elaeocarpus lanceifolius (Roxb.) (Elaeocarpaceae) and Baccaurea sapida (Roxb.) Mull. Arg. (Euphorbiaceae). New compounds were characterized as Triacontanoic acid ( 1 ), octatriacontan-1-ol ( 2 ) and dotriacontane ( 3 ) isolated from C. obtusfolium and E. lanceofolius by 1 H, 13 C NMR and mass spectroscopy respectively. Other two known compounds were palmitic acid ( 4 ) and oleic acid ( 5 ) and from B. sapida . Complete inhibition of pathogenic fungi A.tenuissima and A. alternata were observed for compound 2 and 3 . Further, in-silico molecular binding analysis of these compounds towards endopolygalacturonase, β-isopropyl dehydrogenase, plasma membrane ATPase, calmodulin, ACR-toxin biosynthesis hydroxylase and synthatase peptide (transcription regulator of Amt-gene) of A. tenuissima and A.alternata revealed that they are effective in inhibiting multiple targets. The antifungal potential of three new isolated compounds from C. obtusifolium and E. lanceifolius is reported for the first time. The results indicate the possible use of triacontanoic acid, octatriacontan-1-ol and dotriacontane as potential antifungal agents.
Journal of Functional Foods, 2016
Abstract Twelve classical edible herbs of Assam were studied, among which, Fagopyrum esculentum, ... more Abstract Twelve classical edible herbs of Assam were studied, among which, Fagopyrum esculentum, Paederia scandens and Amaranthus viridis showed strong antioxidant potential with high phenolic contents. Rutin and gallic acids were the most abundant phenolic compounds. α-Tocopherol was present in all herbs, while ascorbic acid was found only in some. Leucas aspera and Hydrocotyle sibthorpioides were good sources of both α-tocopherol and ascorbic acid. All twelve herbs were devoid of Pb and Cd. Pouzolzia indica was a rich source of Ca, Fe and Zn. Further, the plants were found to be moderately active against mycotoxin producing fungus Alternaria tenuissima.
Bioorganic & Medicinal Chemistry Letters, 2015
A series of new fluoroarene derivatives of artemisinin were prepared using Suzuki and Sonogashira... more A series of new fluoroarene derivatives of artemisinin were prepared using Suzuki and Sonogashira cross-coupling reactions. An antifungal and antitumor activity was evaluated against opportunistic pathogen Fusarium oxysporum and Hela cancer cell line. All these derivatives have shown moderate to good activity.
American Journal of Plant Sciences, 2015
Antifungal activity of plant extracts and essential oils of six different plant species was teste... more Antifungal activity of plant extracts and essential oils of six different plant species was tested against three pathogenic fungi, viz., Alternaria alternata, Colletotrichum gloeosporioides and Fusarium moniliforme isolated from Jatropha curcas L. using Poison Food Technique. All the samples tested were found effective in-vitro. More than 60% inhibition of growth of individual fungal species was observed at 100 ppm. Maximum inhibition was observed at concentration of 1000 ppm. However, among the essential oils tested Cinnamomum impressinervium exhibited the strongest activity (80%) in the case of Colletotrichum gloeosporioides and Alternaria alternate and 78.6% in the case of Fusarium oxysporum at concentration of 1000 ppm followed by Cinnamomum tamala, Cymbopogon jwarancusa and Cymbopogon citratus respectively. Among the plant extracts tested, Catharanthus roseus exhibited stronger activity in comparison to Tithonia diversifolia. Inhibition percentage of all the essential oils and plant extracts increased with the increase in concentration.
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Papers by Purnajyoti D Bhuyan