Plants Used Against Gastro-Intestinal Disorders and As Anti Hemorrhagic by Three Tribes of North Tripura District, Tripura, India: A Report

The tribals of Tripura depend basically on different herbs for their treatment. The field work documented about nineteen plant species used against stomach disorders and as anti- hemorrhagic by three different tribes, the Halams, Tripuris and Chakmas of North Tripura district of Tripura state, India. Some of these have been known for ages for their medicinal properties, while, others have been recorded for the first time amongst these people. Some of the plants are reported to be in their wild state and others are domesticated

Indigenous Knowledge on Healthcare Practices by the Reang Tribe of Dhalai District of Tripura, North East India

The present study aimed to prepare an inventory of ethnomedicinal plants used by the Reang tribe Dhalai district of Tripura state, India. Reangs are mostly residing in deep forest and depend on their own traditional health care system. The survey was conducted during 2003 to 2004 in the different villages of Dhalai district of the state covering all the seasons. In the present work a total of 58 medicinal plants species belonging to 57 genera and 39 families are presented. Out of the total collection, in maximum cases leaves (48.28%) are used which is followed by root/rhizome (29.31%), bark (10.34%), fruit/seed (8.62%), stem (3.45%) and whole plant (1.72%), against different ailments. The collected plants are mostly used in blood coagulation, cough and cold, fever and headache, diarrhoea and dysentery, stomach problem and gastritis, bone fracture and sprains, carbuncle, jaundice, leucorrhoe, rheumatism, ringworm etc. Plant parts used, their preparation, and doses are discussed along with the family and local names of the collected herbs

Ethnomedicinal Importance of Pteridophytes Used by Reang tribe of Tripura, North East India

The present study mainly focuses on the ethnomedicinal importance of Pteridophytic floras used by the Reang tribes of Tripura state, India. As many as 16 pteridophytic plants species belonging to 14 genera and 10 families are presented in this research article. The botanical name, family name, vernacular name, habit, and their ethnomedicinal uses are provided

Fixed points of fuzzy mappings in Hilbert spaces

In this paper we work out two fixed point theorems for fuzzy mappings on Hilbert spaces. The proofs rely on the paralellogram law in Hilbert spaces

Chaos and Complexity from Quantum Neural Network: A study with Diffusion Metric in Machine Learning

In this work, our prime objective is to study the phenomena of quantum chaos and complexity in the machine learning dynamics of Quantum Neural Network (QNN). A Parameterized Quantum Circuits (PQCs) in the hybrid quantum-classical framework is introduced as a universal function approximator to perform optimization with Stochastic Gradient Descent (SGD). We employ a statistical and differential geometric approach to study the learning theory of QNN. The evolution of parametrized unitary operators is correlated with the trajectory of parameters in the Diffusion metric. We establish the parametrized version of Quantum Complexity and Quantum Chaos in terms of physically relevant quantities, which are not only essential in determining the stability, but also essential in providing a very significant lower bound to the generalization capability of QNN. We explicitly prove that when the system executes limit cycles or oscillations in the phase space, the generalization capability of QNN is maximized. Moreover, a lower bound on the optimization rate is determined using the well known Maldacena Shenker Stanford (MSS) bound on the Quantum Lyapunov exponent

Novel thiol-ene hybrid coating for metal protection

Published: 7 April 2016A novel hybrid anticorrosion coating with dual network of inorganic (Si–O–Si) and organic bonds (C–S–C) was prepared on metal through an in situ sol-gel and thiol-ene click reaction. This novel interfacial thin film coating incorporates (3-mercaptopropyl) trimethoxysilane (MPTS) and 1,4-di(vinylimidazolium) butane bisbromide based polymerizable ionic liquid (PIL) to form a thiol-ene based photo-polymerized film, which on subsequent sol-gel reaction forms a thin hybrid interfacial layer on metal surface. On top of this PIL hybrid film, a self-assembled nanophase particle (SNAP) coating was employed to prepare a multilayer thin film coating for better corrosion protection and barrier performance. The novel PIL hybrid film was characterised for structure and properties using Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The corrosion protection performance of the multilayer coating was examined using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results reveal that this novel double layer coating on metal offers excellent protection against corrosion and has remarkably improved the barrier effect of the coating.Mona Taghaviksih, Surya Subianto, Naba Kumar Dutta and Namita Roy Choudhur

Salt Crystal Growth in Interacting Drops of a Complex Biopolymer: Statistical Characterization Using FESEM Images

This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record.  A simple colloidal drop generally forms ring like patterns after drying. The deposition morphology of the dried drop changes significantly when such a drop dries in the vicinity of another similar drop. Here we present an observational study and statistical analysis of the patterns formed inside an isolated as well as interacting drops of gelatin containing sodium sulfate (Na2SO4). In all the cases, multiple concentric regions of solute particles combined with the polymer gel appear as the drops dry up. Needle crystals of sulfur and coacervates of salt and gelatin are visible in some regions. The outer region becomes non-uniform, so does the size distribution of the needle crystals and coacervates. The non-uniformity increases with proximity of the drops. Here we propose a novel mechanism of growing patterns inside the single drop during drying and correlate that with the results obtained for interacting drops. This study and the proposed mechanism provide insights into the future studies of drying drops under different physical conditions. Further we explore the statistical characteristics of the single and interacting drops using the field emission scanning electron microscopy (FESEM) images. Next, we report fractal and image texture analyses along with object shape statistics of the drop FESEM images, under various experimental conditions. Several statistical hypothesis tests have been carried out to identify the most significant features.SERB, IndiaGovt. of Indi

Composite electrolyte membranes from partially fluorinated polymer and hyperbranched, sulfonated polysulfone

Macromolecular modification of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF) was done with various proportions of sulfonic acid terminated, hyperbranched polysulfone (HPSU) with a view to prepare ion conducting membranes. The PVDF-co-HFP was first chemically modified by dehydrofluorination and chlorosulfonation in order to make the membrane more hydrophilic as well as to introduce unsaturation, which would allow crosslinking of the PVDF-co-HFP matrix to improve the stability of the membrane. The modified samples were characterized for ion exchange capacity, morphology, and performance. The HPSU modified S-PVDF membrane shows good stability and ionic conductivity of 5.1 mS cm⁻¹ at 80 °C and 100% RH for blends containing 20% HPSU, which is higher than the literature values for equivalent blend membranes using Nafion. SEM analysis of the blend membranes containing 15% or more HPSU shows the presence of spherical domains with a size range of 300–800 nm within the membranes, which are believed to be the HPSU-rich area.Surya Subianto, Namita Roy Choudhury and Naba Dutt

Polymeric ionic liquid nanoparticle emulsions as a corrosion inhibitor in anticorrosion coatings

In this contribution, we report the facile preparation of cross-linked polymerizable ionic liquid (PIL)-based nanoparticles via thiol–ene photopolymerization in a miniemulsion. The synthesized PIL nanoparticles with a diameter of about 200 nm were fully characterized with regard to their chemical structures, morphologies, and properties using different techniques, such as Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, and transmission electron microscopy. To gain an in-depth understanding of the physical and morphological structures of the PIL nanoparticles in an emulsion, small-angle neutron scattering and ultra-small-angle neutron scattering were used. Neutron scattering studies revealed valuable information regarding the formation of cylindrical ionic micelles in the spherical nanoparticles, which is a unique property of this system. Furthermore, the PIL nanoparticle emulsion was utilized as an inhibitor in a self-assembled nanophase particle (SNAP) coating. The corrosion protection ability of the resultant coating was examined using potentiodynamic polarization and electrochemical impedance spectroscopy. The results show that the PIL nanoparticle emulsion in the SNAP coating acts as an inhibitor of corrosion and is promising for fabricating advanced coatings with improved barrier function and corrosion protection.Mona Taghavikish, Surya Subianto, Naba Kumar Dutta, Liliana de Campo, Jitendra P. Mata, Christine Rehm, and Namita Roy Choudhur