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Sandeep Janghu, Manab B Bera, Vikas Nanda, Ashish Rawson
The present study was done to optimize the power ultrasound processing for maximizing diastase activity of and minimizing hydroxymethylfurfural (HMF) content in honey using response surface methodology. Experimental design with treatment time (1-15 min), amplitude (20-100%) and volume (40-80 mL) as independent variables under controlled temperature conditions was studied and it was concluded that treatment time of 8 min, amplitude of 60% and volume of 60 mL give optimal diastase activity and HMF content, i...
December 2017: Food Technology and Biotechnology
Renaud Sabatier, Emanuel Nicolas, Maria Paciencia, Annie-Pierre Jonville-Béra, Anne Madroszyk, Maud Cecile, Cecile Braticevic, Ségolène Duran, Louis Tassy, Franck Rouby, Joëlle Micallef, Frédérique Rousseau
BACKGROUND: Nivolumab is approved worldwide as second-line treatment for metastatic non-small cell lung cancer (NSCLC). Despite the fact that most of these cancers are being diagnosed in the older patients, few of the patients were included in pivotal trials. We aimed to describe efficacy and safety in a "real-world" older population. PATIENTS AND METHODS: We retrospectively collected data from older patients (≥70 years old) with advanced or metastatic NSCLC treated with Nivolumab in our institution...
March 9, 2018: Journal of Geriatric Oncology
Deep Bera, Shreyas B Raghunathan, Chao Chen, Zhao Chen, Michiel A P Pertijs, Martin D Verweij, Verya Daeichin, Hendrik J Vos, Antonius F W van der Steen, Nico De Jong, Johan Hans G Bosch
Until now, no matrix transducer has been realized for 3D transesophageal echocardiography (TEE) in pediatric patients. In 3D TEE with a matrix transducer, the biggest challenges are to connect a large number of elements to a standard ultrasound system, and to achieve a high volume rate (>200 Hz). To address these issues, we have recently developed a prototype miniaturized matrix transducer for pediatric patients with micro-beamforming and a small central transmitter. In this paper we propose two multiline parallel 3D beamforming techniques (µBF25 and µBF169) using the micro-beamformed datasets from 25 and 169 transmit events to achieve volume rates of 300 Hz and 44 Hz, respectively...
March 6, 2018: Physics in Medicine and Biology
Kazuyuki Tokumaru, Kalisankar Bera, Jeffrey N Johnston
Umpolung Amide Synthesis (UmAS) has emerged as a superior alternative to conventional amide synthesis methods based on carbonyl electrophiles in a range of situations, particularly when epimerization-prone couplings are prescribed. In an unanticipated development during our most recent studies, it was discovered that diacyl hydrazide products from UmAS were not formed as intermediates when using an acyl hydrazide as the amine acceptor. This resulted in a new preparation of 1,3,4-oxadiazoles from α-bromonitroalkane donors...
October 2017: Synthesis
Timir Baran Sil, Bankanidhi Sahoo, Subhas Chandra Bera, Kanchan Garai
Amyloids are heterogeneous assemblies of extremely stable fibrillar aggregates of proteins. Although biological activities of the amyloids are dependent on its conformation, quantitative evaluation of heterogeneity of amyloids has been difficult. Here we use disaggregation of the amyloids of tetramethylrhodamine-labeled Aβ (TMR-Aβ) to characterize its stability and heterogeneity. Disaggregation of TMR-Aβ amyloids, monitored by fluorescence recovery of TMR, was negligible in native buffer even at low nanomolar concentrations but the kinetics increased exponentially with addition of denaturants such as urea or GdnCl...
February 27, 2018: Biophysical Journal
Paola Ortelli, Davide Ferrazzoli, Rossana Bera, Luca Caremani, Nir Giladi, Roberto Maestri, Giuseppe Frazzitta
BACKGROUND: Parkinsonian patients in advanced stages of disease suffer from many motor and non-motor symptoms, whose responsiveness to dopamine replacement therapy and deep brain stimulation is poor. It is necessary to find complementary strategies in order to improve the clinical conditions of patients in advanced Parkinson's disease (PD) stages. OBJECTIVE: We aimed to understand whether an inpatient, motor-cognitive, multidisciplinary, aerobic, intensive and goal-based rehabilitation treatment (MIRT), specifically designed for PD, is effective for patients in advanced stages of disease...
2018: Journal of Parkinson's Disease
Jiwan Gurung, Dependra Chamlagai, Nirmal Kumar Bera, Tapas Kumar Chaudhuri, Bisu Singh
PURPOSE: Chronic, low-grade inflammation is a proposed etiological factor associated with schizophrenia. Thus, various studies have been conducted to understand the role of inflammatory process in schizophrenia by using inflammatory maker C-reactive protein (CRP) with conflicting findings. Inadvertently, studies of CRP among the Indian schizophrenia patients are very few. Therefore, the present study was undertaken to investigate the role of inflammatory process among Indian Bengalee schizophrenia patients of Siliguri, using the marker CRP and its stimulating cytokine interleukin-6 (IL-6)...
February 21, 2018: Nordic Journal of Psychiatry
Mariadoss Asha Jhonsi, Devanesan Arul Ananth, Gayathri Nambirajan, Thilagar Sivasudha, Rekha Yamini, Soumen Bera, Arunkumar Kathiravan
In recent years, quantum dots (QDs) are one of the most promising nanomaterials in life sciences community due to their unexploited potential in biomedical applications; particularly in bio-labeling and sensing. In the advanced nanomaterials, carbon dots (CDs) have shown promise in next generation bioimaging and drug delivery studies. Therefore the knowledge of the exact nature of interaction with biomolecules is of great interest to designing better biosensors. In this study, the interaction between CDs derived from tamarind and calf thymus DNA (ct-DNA) has been studied by vital spectroscopic techniques, which revealed that the CDs could interact with DNA via intercalation...
February 8, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Madhab Bera, Pragya Gupta, Pradip K Maji
Facile one pot synthesis of graphene oxide (GO) by sonication assisted mechanochemical approach has been reported here. The amalgamation of ultrasonication and mechanical stirring has assisted the synthesis of GO in a short time duration of only 4 hours with good reaction yield. The structural characterization of GO was performed by X-ray diffraction spectroscopy (XRD), Fourier transform infrared spectroscopy (FTIR), UV-Visible spectroscopy and Raman spectroscopy. Atomic force microscopic (AFM) analysis manifested the flake like morphology of GO with average sheet thickness ~1...
February 1, 2018: Journal of Nanoscience and Nanotechnology
Rekha Yamini Kosuru, Md Aashique, Aisha Fathima, Amrita Roy, Soumen Bera
AIM: To understand the effects of gallic acid (GA) on ampicillin (Amp) sensitive or resistant strain of Pseudomonas sp. and also in modulating the corresponding biofilms. METHODOLOGY: The cell viability was determined by broth dilution, dry weight and CFU assays. Biofilm formation was measured by crystal violet assay while oxygen consumption rate was measured to verify the metabolic status of the cells. The membrane damage and drug efflux/accumulation were studied by fluorimetric assays...
February 15, 2018: Future Microbiology
Corentin Cornu, Matthieu Guédra, Jean-Christophe Béra, Hao-Li Liu, Wen-Shiang Chen, Claude Inserra
In the aim of limiting the destructive effects of collapsing bubbles, the regime of stable cavitation activity is currently targeted for sensitive therapeutic applications such as blood-brain barrier opening by ultrasound. This activity is quantified through the emergence of the subharmonic component of the fundamental frequency. Due to the intrinsically stochastic behavior of the cavitation phenomenon, a better control of the different (stable or inertial) cavitation regimes is a key requirement in the understanding of the mechanisms involving each bubble-induced mechanical effect...
April 2018: Ultrasonics Sonochemistry
Suvadra Das, Asim Halder, Saptarshi Mandal, Mohammad Abu Jafar Mazumder, Tanmoy Bera, Arup Mukherjee, Partha Roy
Visceral leishmaniasis (VL) is World Health Organization designated most serious leishmaniasis with an annual mortality rate of 50,000. Even after country specific eradication programs, the disease continues to multiply with added complexities like resistance development, drug hypersensitivity and associated infections. Newer therapeutic interventions are urgently warranted to control the spread. Present study aims to arrive at terpenoid andrographolide engineered gold nanoparticle (AGAunps) facile synthesis and its efficacy evaluations against wild and drug resistant VL strains for the first time...
February 8, 2018: Artificial Cells, Nanomedicine, and Biotechnology
Zhe Wang, Jianda Wu, Wang Yang, Anup Kumar Bera, Dmytro Kamenskyi, A T M Nazmul Islam, Shenglong Xu, Joseph Matthew Law, Bella Lake, Congjun Wu, Alois Loidl
Almost a century ago, string states-complex bound states of magnetic excitations-were predicted to exist in one-dimensional quantum magnets. However, despite many theoretical studies, the experimental realization and identification of string states in a condensed-matter system have yet to be achieved. Here we use high-resolution terahertz spectroscopy to resolve string states in the antiferromagnetic Heisenberg-Ising chain SrCo2V2O8 in strong longitudinal magnetic fields. In the field-induced quantum-critical regime, we identify strings and fractional magnetic excitations that are accurately described by the Bethe ansatz...
February 7, 2018: Nature
Jayeeta Kolay, Sudipta Bera, Tatini Rakshit, Rupa Mukhopadhyay
Realization of useful nanometre length scale devices in which metalloproteins are junction-confined in a distinct molecular arrangement for generating practical electronic signals (for example, in bioelectronic switch configuration), is elusive till date. This is mostly due to difficulties in observing electronically appropriate signal (i.e., reproducible and controllable), when studied under junction-assembled condition. A useful 'ON' - 'OFF' behaviour, based on the negative differential resistance (NDR) peak characteristics in the current-voltage response curves, acquired using metal-insulator-metal (MIM) configuration, has been observed only in case of a few proteins, namely, azurin, cytochrome C and bacteriorhodopsin, so far...
February 7, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
Soumya Maity, Amit Bera, Nandini Ghosh-Choudhury, Falguni Das, Balakuntalam S Kasinath, Goutam Ghosh Choudhury
TGFβ contributes to mesangial cell hypertrophy and matrix protein increase in various kidney diseases including diabetic nephropathy. Deptor is an mTOR-interacting protein and suppresses mTORC1 and mTORC2 activities. We have recently shown that TGFβ-induced inhibition of deptor increases the mTOR activity. The mechanism by which TGFβ regulates deptor expression is not known. Here we identify deptor as a target of the microRNA-181a. We show that in mesangial cells, TGFβ increases the expression of miR-181a to downregulate deptor...
January 31, 2018: Experimental Cell Research
Hélène Cornillier, Bruno Giraudeau, Stéphane Munck, Florence Hacard, Annie-Pierre Jonville-Bera, Gwenaëlle d'Acremont, Bach-Nga Pham, Annabel Maruani
BACKGROUND: Chronic spontaneous urticaria (CSU) is not frequent in children. Management guidelines have been developed for adults and randomized controlled trials (RCTs) included teenagers aged 12 to 18, but data for children under age 12 are limited. We performed a systematic review to assess comorbidities in children < 12 years old with CSU and the efficacy and safety of treatments. METHODS: We searched for original articles of epidemiologic and treatment data in children < 12 years old with CSU that were published from 2005 to July 2016 in MEDLINE, EMBASE, CENTRAL and LILACS...
February 2, 2018: Pediatric Allergy and Immunology
Soumen Bera, Latha Sabikhi, Ashish Kumar Singh
The impact of malting on composition and malt quality parameters such as diastatic power, α-amylase activity, β-amylase activity, hot water extract and β-glucan content were investigated in five different Indian barley cultivars. Protein content of grains increased significantly after malting. Soluble protein content of unmalted grain, which ranged from 3.20-3.93% increased after malting to 4.26-4.85%. Diastatic power of mature grain varied across genotype and their level increased (58.98-81.05 to 115.93-142...
February 2018: Journal of Food Science and Technology
Subhas C Bera, Tapas Paul, A N Sekar Iyengar, Padmaja P Mishra
We have investigated the isomerization dynamics and plausible energy landscape of 4-way Holliday junctions (4WHJs) bound to integration host factor (IHF, a DNA binding protein), considering the effect of applied external force, by single-molecule FRET methods. A slowing down of the forward as well as the backward rates of the isomerization process of the protein bound 4WHJ has been observed under the influence of an external force, which indicates an imposed restriction on the conformational switching. This has also been reflected by an increase in rigidity, as observed from the increase in the single-molecule FRET (smFRET)-anisotropy values (0...
January 31, 2018: Faraday Discussions
Jeannie D Lochhead, Michele A Nelson, Rimal Bera
No abstract text is available yet for this article.
February 2018: Annals of Clinical Psychiatry: Official Journal of the American Academy of Clinical Psychiatrists
Sourav Chakraborty, Kevin J Endres, Ranajit Bera, Lukasz Wojtas, Charles N Moorefield, Mary Jane Saunders, Neeladri Das, Chrys Wesdemiotis, George R Newkome
The quantitative, single step, self-assembly of a shape-persistent, three-dimensional C3v-symmetric, triptycene-based tris-terpyridinyl ligand initially gives a platonic-based cubic architecture, which was unequivocally characterized by 1D and 2D NMR spectroscopy, mass spectrometry, and single crystal X-ray structural analysis. The unique metal-ligand binding properties of the Cd2+ analogue of this construct give rise to a concentration-dependent dynamic equilibrium between cube, prism, and tetrahedron-shaped architectures...
January 24, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
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