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Das B, De D. Router design for nano-communication using actin quantum cellular automata. IET Nanobiotechnol 2020; 14:609-616. [PMID: 33010137 PMCID: PMC8676500 DOI: 10.1049/iet-nbt.2020.0186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/21/2020] [Accepted: 07/10/2020] [Indexed: 11/20/2022] Open
Abstract
Logic expressions can be designed from actin filaments. It is a protein that makes the cellular structure and plays an important role in intracellular communication. Nano communication technique has been established using actin cellular automata. Among several rules, (1, 30) and (4, 27) rules have been used to design 2 to 1 multiplexer, 4 to 1 multiplexer, 1 to 2 demultiplexer and 1 to 4 demultiplexer. Router or data selector has been made of using multiplexer and demultiplexer. Three novel circuits such as multiplexer, demultiplexer and nano-router have been designed using the projected mechanism. The primary focus of this proposed technique is on different designs of the multiplexer, demultiplexer and minimum cell count with minimum time steps. The different router circuits have been simulated with the help of Simulink by which output has been verified for different circuits. Stuck at fault analysis is also done in this study. Device density and power consumption have also been included in this study. A comparative analysis of the different designs of the router provides a better concept of circuit optimisation. Furthermore, this study analyses convenient forthcoming applications in nano-technology and nano-bio-molecular systems involving the proposed parameters.
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Das B, Borah B, Bhattacharyya S. COMPARATIVE ANALYSIS OF CARBOXYMETHYL CELLULOSE AND PARTIALLY HYDROLYZED POLYACRYLAMIDE – LOW-SOLID NONDISPERSED DRILLING MUD WITH RESPECT TO PROPER-TY ENHANCEMENT AND SHALE INHIBITION. RESOURCE-EFFICIENT TECHNOLOGIES 2020. [DOI: 10.18799/24056537/2020/2/262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
During drilling, different problems are encountered that can interfere with smooth drilling processes, including the accumulation of cuttings, reduced penetration rates, pipe sticking, loss of wellbore stability, and loss of circulation. These problems are generally encountered with conventional drilling mud, such as the bentonite–barite mud system. Formation damage is the most common problem encountered in bentonite mud systems with high solid content. In this work, we aimed to formulate two low-solid nondispersed (LSND) muds: carboxymethyl cellulose (CMC)–LSND mud and partially hydrolyzed polyacrylamide (PHPA)–LSND mud. A comparative analysis was performed to evaluate their property enhancements. LSND muds aid in maintaining hole stability and proper cutting removal. The results of this work show that the addition of both CMC and PHPA helps to improve drilling fluid properties; however, the PHPA–LSND mud was found to be superior. Shale swelling is a major concern in the petroleum industry, as it causes various other problems, such as pipe sticking, low penetration rates, and bit wear. The effect of these two LSND polymer muds in inhibiting shale swelling was analyzed using shale collected from the Champhai district of Mizoram, India.
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Mahajan A, Goel G, Das B, Banga V. Reruptured Previously Coiled Aneurysm - Is it the Ideal Time to Perform Check Angiography at Six Months after Endovascular Coiling? Neurol India 2020; 68:698-700. [PMID: 32643694 DOI: 10.4103/0028-3886.289007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Choudhury N, Paul D, Das B, (Chanda) DD, Bhattacharjee A. Real time PCR based detection of broadhost range plasmids and their potential use as biomarker in detection of multidrug resistant gram negative bacteria. J Infect Public Health 2020. [DOI: 10.1016/j.jiph.2020.01.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Janas MM, Zlatev I, Liu J, Jiang Y, Barros SA, Sutherland JE, Davis WP, Liu J, Brown CR, Liu X, Schlegel MK, Blair L, Zhang X, Das B, Tran C, Aluri K, Li J, Agarwal S, Indrakanti R, Charisse K, Nair J, Matsuda S, Rajeev KG, Zimmermann T, Sepp-Lorenzino L, Xu Y, Akinc A, Fitzgerald K, Vaishnaw AK, Smith PF, Manoharan M, Jadhav V, Wu JT, Maier MA. Safety evaluation of 2'-deoxy-2'-fluoro nucleotides in GalNAc-siRNA conjugates. Nucleic Acids Res 2019; 47:3306-3320. [PMID: 30820542 PMCID: PMC6468299 DOI: 10.1093/nar/gkz140] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 02/07/2019] [Accepted: 02/19/2019] [Indexed: 11/29/2022] Open
Abstract
For oligonucleotide therapeutics, chemical modifications of the sugar-phosphate backbone are frequently used to confer drug-like properties. Because 2′-deoxy-2′-fluoro (2′-F) nucleotides are not known to occur naturally, their safety profile was assessed when used in revusiran and ALN-TTRSC02, two short interfering RNAs (siRNAs), of the same sequence but different chemical modification pattern and metabolic stability, conjugated to an N-acetylgalactosamine (GalNAc) ligand for targeted delivery to hepatocytes. Exposure to 2′-F-monomer metabolites was low and transient in rats and humans. In vitro, 2′-F-nucleoside 5′-triphosphates were neither inhibitors nor preferred substrates for human polymerases, and no obligate or non-obligate chain termination was observed. Modest effects on cell viability and mitochondrial DNA were observed in vitro in a subset of cell types at high concentrations of 2′-F-nucleosides, typically not attained in vivo. No apparent functional impact on mitochondria and no significant accumulation of 2′-F-monomers were observed after weekly administration of two GalNAc–siRNA conjugates in rats for ∼2 years. Taken together, the results support the conclusion that 2′-F nucleotides can be safely applied for the design of metabolically stabilized therapeutic GalNAc–siRNAs with favorable potency and prolonged duration of activity allowing for low dose and infrequent dosing.
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Das B, Goel G, Mahajan A, Vinit B, Arun G. Daft (dual aspiration and fluff technique) for stent retrievers in acute ischemic stroke with large vessel occlusion: A successful new technique for early recanalisation. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Acharya M, Das B, Nahar NB. Cryptococcal meningitis in HIV and non-HIV patients - A comparative study of clinical and CSF parameters. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Das B, Goel G, Mahajan A, Banga V, Singh V. Surpass flow diverter in the treatment of acutely ruptured aneurysms: Indian multi-center experience. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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McBride O, Schneider E, Das B, Sastre L. In Person, Online or Social Media? Preferences of Low-Income Patients for Nutrition and Physical Activity Programming within Community Clinics. J Acad Nutr Diet 2019. [DOI: 10.1016/j.jand.2019.08.156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Bansal A, Sanariya K, Garg A, Das B. Thrombolysis of acute ischemic stroke in a HIV-positive patient: Report and review of literature. Neurol India 2019; 67:580-582. [DOI: 10.4103/0028-3886.258007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Rajan R, Wilson V, Das B, Singh P, Ahluwalia J, Mehta S, Lal V. Stroke and POEMS syndrome: More than a chance association. Neurol India 2018; 64:1318-1319. [PMID: 27841210 DOI: 10.4103/0028-3886.193842] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Kumari K, Tripathy J, Mohapatra P, Verma S, Das B, Raina V, Ray L. Evaluation of toxicity of HCH isomers and its degradation metabolites on mammalian cell line and zebra fish embryos. N Biotechnol 2018. [DOI: 10.1016/j.nbt.2018.05.1142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Mahajan A, Das B, Narang KS, Jha AN, Singh VP, Sapra H, Goel G. Surpass Flow Diverter in the Treatment of Ruptured Intracranial Aneurysms-A Single-Center Experience. World Neurosurg 2018; 120:e1061-e1070. [PMID: 30213677 DOI: 10.1016/j.wneu.2018.09.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 08/30/2018] [Accepted: 09/02/2018] [Indexed: 11/27/2022]
Abstract
BACKGROUND Use of a Surpass flow diverter (FD) device in the treatment of acutely ruptured aneurysm has not been well studied and reported in the literature. METHODS We retrospectively reviewed patients with subarachnoid hemorrhage who were treated by Surpass FD placement at our hospital between June 2016 and March 2018. Detailed analysis of medical records was performed to obtain patient age, gender, clinical history, Hunt and Hess grade, Fisher grade, results of radiographic and procedural details including technical success and complication, clinical outcome, and follow-up angiographic results. RESULTS Our search identified 16 patients with 16 aneurysms who were treated with Surpass FD, of which 13 aneurysms (81%) were in the anterior circulation and 3 (19%) were in the posterior circulation. Aneurysm size ranged from 1.1 to 16 mm, with a mean of 4 mm. The mean delay between subarachnoid hemorrhage and endovascular treatment was 5 days (range, 3-20 days). Only 1 Surpass FD was used in each patient, ranging in size from 3 × 25 mm to 4 × 50 mm. Fifteen patients (94%) achieved favorable clinical outcome (modified Rankin Scale score 0-1) at 3 months. One patient died of invasive fungal infection. Angiographic follow-up results were assessed by O'Kelly-Marotta grading scale in 15 surviving patients and showed a grade D result (no filling) in 13/15 aneurysms (87%) at 3 and 6 months. CONCLUSIONS A Surpass FD device is a feasible option for the treatment of ruptured intracranial aneurysms that are difficult to treat by conventional clipping and coiling; however, larger and comparative studies with long-term follow-up are needed to confirm its safety and efficacy.
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Mahajan A, Goel G, Das B, Narang K. Dissecting aneurysm of vertebral artery involving the origin of posteroinferior cerebellar artery treated with retrograde stent placement and coil embolization in the era of flow diverter. Asian J Neurosurg 2018; 13:910-913. [PMID: 30283580 PMCID: PMC6159080 DOI: 10.4103/ajns.ajns_59_18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Ruptured vertebral artery (VA) dissecting aneurysm carries high risk of rerupture and mortality if not treated immediately. Dissecting aneurysm of the VA involving the posteroinferior cerebellar artery (PICA) origin is difficult to treat by surgical and endovascular route. With the availability of flow diversion device for reconstructive procedure, endovascular treatment has now become easy to treat difficult aneurysm while maintaining the patency of the PICA. However, instead of using flow diverter (FD) in our case, we successfully treated dissecting VA aneurysm involving the PICA origin with retrograde stent placement from distal right VA to the left PICA to maintain the patency of PICA and occlusion of dissecting aneurysm of VA with detachable coils instead of performing surgical bypass and FD placement.
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Sett A, Das D, Banerjee D, Ghorai UK, Das NS, Das B, Chattopadhyay KK. 1D-2D hybrids as efficient optoelectronic materials: a study on graphitic carbon nitride nanosheets wrapped with zinc oxide rods. Dalton Trans 2018; 47:4501-4507. [PMID: 29505061 DOI: 10.1039/c8dt00016f] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zinc oxide (ZnO) nanorods (NRs) wrapped with graphitic carbon nitride (GCN) nanosheet (NS) hybrids have been synthesized by a simple chemical process. The as-prepared samples are characterized by X-ray diffraction, field emission scanning electron microscopy, high resolution transmission electron microscopy, Fourier transformed infrared spectroscopy, UV-Vis spectroscopy and photoluminescence spectroscopy. The images obtained from the transmission electron microscopic study and the existence of C-N stretching modes as observed from Fourier transform infrared spectroscopy confirm the successful attachment of GCN NSs onto the ZnO NRs. It is seen that hybrid samples show broad photoluminescence (PL) emission with enhanced defect related emission along with a quenching effect due to the charge transfer mechanism. The results have been explained by taking into consideration the three different types of electron transitions occurring within the type-II band structure of the hybrid samples. Moreover a study on the conductivity of the samples is carried out under dark conditions and also under ultraviolet (UV) light irradiation. It is observed that the hybrid samples show significantly improved conductivity under both dark and UV irradiated conditions. The absorbance of the samples in the UV range shows better conductivity under UV conditions as compared to dark conditions.
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Godown J, Pruitt E, Vo J, Dodd D, Lytrivi I, Boyle G, Sutcliffe D, Kleinmahon J, Shih R, Urschel S, Das B, Carlo W, Zuckerman W, West S, McCulloch M, Zinn M, Simpson K, Kindel S, Szmuszkovicz J, Chrisant M, Auerbach S, Carboni M, Hsu D. Practice Variation in the Diagnosis of Acute Rejection Among Pediatric Heart Transplant Centers: An Analysis of the Pediatric Heart Transplant Study (PHTS) Database. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.465] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Mahajan A, Goel G, Das B, Narang KS. Recanalized Left Internal Carotid Artery Bifurcation Aneurysm with Adherent Thrombus at Aneurysm Neck and M1 Origin Diagnosed on 2-Dimensional Angiography-Cause of Embolic Stroke. World Neurosurg 2018. [PMID: 29524698 DOI: 10.1016/j.wneu.2018.02.163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We report a unique case of recanalized left internal carotid artery aneurysm with thrombus adherent to the aneurysm neck and M1 origin diagnosed on 2-dimensional angiography causing embolic stroke in a 66-year-old female who was successfully treated with stent-assisted coiling. This is important to recognize as a cause of embolic stroke.
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Mondal M, Das B, Howli P, Das N, Chattopadhyay K. Porosity-tuned NiO nanoflakes: Effect of calcination temperature for high performing supercapacitor application. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.01.049] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Mahajan A, Das B, Goel G, Garg A, Sapra H. Carotid stump syndrome treated with endovascular coiling: A rare cause of stroke in young patients. Neurol India 2018; 66:228-229. [PMID: 29322990 DOI: 10.4103/0028-3886.222861] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Das B, Goel G, Mahajan A, Bansal AR, Sapra H, Jha AN. An Unusual Cause of Posterior Reversible Encephalopathy Syndrome. Asian J Neurosurg 2018; 13:1254-1256. [PMID: 30459910 PMCID: PMC6208247 DOI: 10.4103/ajns.ajns_188_17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Posterior reversible encephalopathy syndrome (PRES) is a clinical radiographic diagnosis of heterogeneous etiologies. The pathogenesis of PRES remains unclear, but may be related to impaired cerebral autoregulation and endothelial dysfunction. We present a case of intravascular nonionic contrast-induced PRES observed after cerebral angiography. The index patient was a follow-up case of large vertebrobasilar artery-dissecting aneurysm for which endovascular coiling was done 6 months back. She improved completely within a week. Contrast-induced PRES is a reversible benign condition, knowledge of which is crucial for appropriate management.
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Goel G, Mahajan A, Das B, Narang K. A rare case of spontaneous thrombosis of vein of Galen malformation in a young adult diagnosed on magnetic resonance imaging and digital subtraction angiography. Neurol India 2018; 66:1505-1506. [DOI: 10.4103/0028-3886.241344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Hayer SS, VanderWaal K, Ranjan R, Biswal JK, Subramaniam S, Mohapatra JK, Sharma GK, Rout M, Dash BB, Das B, Prusty BR, Sharma AK, Stenfeldt C, Perez A, Delgado AH, Sharma MK, Rodriguez LL, Pattnaik B, Arzt J. Foot-and-mouth disease virus transmission dynamics and persistence in a herd of vaccinated dairy cattle in India. Transbound Emerg Dis 2017; 65:e404-e415. [PMID: 29205858 DOI: 10.1111/tbed.12774] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Indexed: 11/28/2022]
Abstract
Foot-and-mouth disease (FMD) is an important transboundary disease with substantial economic impacts. Although between-herd transmission of the disease has been well studied, studies focusing on within-herd transmission using farm-level outbreak data are rare. The aim of this study was to estimate parameters associated with within-herd transmission, host physiological factors and FMD virus (FMDV) persistence using data collected from an outbreak that occurred at a large, organized dairy farm in India. Of 1,836 regularly vaccinated, adult dairy cattle, 222 had clinical signs of FMD over a 39-day period. Assuming homogenous mixing, a frequency-dependent compartmental model of disease transmission was built. The transmission coefficient and basic reproductive number were estimated to be between 16.2-18.4 and 67-88, respectively. Non-pregnant animals were more likely to manifest clinical signs of FMD as compared to pregnant cattle. Based on oropharyngeal fluid (probang) sampling and FMDV-specific RT-PCR, four of 36 longitudinally sampled animals (14%) were persistently infected carriers 10.5 months post-outbreak. There was no statistical difference between subclinical and clinically infected animals in the duration of the carrier state. However, prevalence of NSP-ELISA antibodies differed significantly between subclinical and clinically infected animals 12 months after the outbreak with 83% seroprevalence amongst clinically infected cattle compared to 69% of subclinical animals. This study further elucidates within-herd FMD transmission dynamics during the acute-phase and characterizes duration of FMDV persistence and seroprevalence of FMD under natural conditions in an endemic setting.
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Das B, Kothiala A, Mahajan A, Goel G, Garg A. Letter re: Evaluation of hyperacute infarct volume using ASPECTS and brain CT perfusion core volume. Neurology 2017; 89:2397. [DOI: 10.1212/wnl.0000000000004702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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49
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Sadhu T, Das B, De D, Das JC. Design of binary subtractor using actin quantum cellular automata. IET Nanobiotechnol 2017. [DOI: 10.1049/iet-nbt.2017.0149] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Mahajan A, Goel G, Das B. Critical carotid bulb stenosis with intraluminal thrombus: Importance of delayed carotid stenting. J Neuroradiol 2017; 45:62-63. [PMID: 28964925 DOI: 10.1016/j.neurad.2017.09.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Revised: 08/17/2017] [Accepted: 09/05/2017] [Indexed: 11/19/2022]
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