A CLINICAL STUDY OF MARKET SAMPLES OF NAGAKESARA IN THE MANAGEMENT OF POLY CYSTIC OVARIAN DISEASE (PCOD)

This study was conducted to evaluate the efficacy of different market samples of Nagakesara in cases of PCOD. In this study 30 patients were divided into 3 groups. Group 1: MF Group (Mesua ferrea Linn. powder with milk), Group 2: OL Group (Ochrocarpus longifolium Benth & Hook. f; powder with milk), Group 3: CT Group (Cinnamomum tamala Nees & Ebern powder with milk) and advocated the trial drug with a dosage of 40-50mg/kg body weight per day for a duration of 3months with a follow up of every 15days. Subjective parameters like duration of menstruation, gap between two cycles, pain during menstruation, quantity of menstrual bleeding, Acne, Hirsutism, Acanthosis nigracans, Obesity are taken and results were analyzed statistically before and after treatment. Group 1 showed that 10% of the patients recovered completely, 55.09% recovered moderately and 35% remains unchanged. Group 2 showed that 10% of the patients recovered completely, 45.66% moderately and 44% remains unchanged. Group 3 showed that 0% of the patients recovered completely, 52% recovered moderately and 48% remains unchanged. Mesua ferrea showed extremely significant result i.e., P<0.001 in duration of menstruation (67.85%), gap between two cycles (65.62%), quantity of menstrual bleeding (66.66%). All the observations related to the total effect of therapy suggests that patients of Group 1 were well responded to the therapy than the patients of Group 2 and Group 3. Conclusion: The present comparative clinical study shows that the Amapachana property, the capacity to induce ovulation and reduction in the clinical features are more clearly observed in Mesua ferrea Linn. than in others

Infrared Absorption Properties of LiH, LiD Mixed Crystals

The normal modes of pure LiH and LiD, required in impurity mode calculations, have been computed on the basis of the deformation-dipole model. Neutron-scattering results of Verble, Warren, and Yarnell for Li7D, along with some other experimental quantities, have been used to determine the various parameters involved. It is found that the frequency spectrum of LiH has a gap and that a substitutional D- ion produces a local mode in this gap whose frequency has been computed, together with its amplitude at the impurity. The infrared absorption frequency associated with this local mode and its integrated absorption have been computed as functions of D- content in the limit of low D- concentration. Also, we find an in-band resonance in the amplitude of the substitutional D- ion. Similar calculations have been carried out for H- impurities in LiD. The present results are compared with those of other calculations and with experiment

A PHARMACOGNOSTIC AND PHYTOCHEMICAL STUDY ON THE MARKET SAMPLES OF NAGAKESARA

This work was conducted to evaluate the pharmacognostic and phytochemical study of varieties of Nagakesara. When it is further studied, it is observed that Nagakesara available in the markets of different areas is from different source plants. There are nearly 5 drugs sold in the market with the same name, the common floral parts available in the markets are commonly from Nagakesara (Mesua ferrea Linn.), Surapunnaga (Ochrocarpus longifolius Benth and Hook f.), Tamalpatra (Cinnamomum tamala Nees and Ebern.), Punnaga (Calophyllum inophyllum Linn.), Dillenia pentagyna Roxb. Hence a comparative study of these two samples 1) Nagakesara (Mesua ferrea), and 2) Tamalpatra (Cinnamomum tamala) has been carried out. The phytochemical study shows the presence of tannins, steroids and carbohydrates in almost all varieties of Nagakesara. Flower buds of Nagakesara plant of different species available in the market was taken up for the study. CONCLUSION: A detailed Pharamcognostic and Phytochemical review was done through which it was concluded that Mesua ferrea Linn. belonging to family Guttiferae may be the exact source of Nagakesara. The flower buds of Cinnamomum tamala Nees and Ebern. which is known as black variety in the markets according to our study,

Interface-Controlled Ferroelectricity at the Nanoscale

Recent experimental results demonstrate that in thin films ferroelectricity persists down to film thickness of a few unit cells. This finding opens an avenue for novel electronic devices based on ultathin ferroelectrics, but also raises questions about factors controlling ferroelectricity and the nature of the ferroelectric state at the nanoscale. Here we report a first-principles study of KNbO3 ferroelectric thin films placed between two metal electrodes, either SrRuO3 or Pt. We show that the bonding at the ferroelectric-metal interface imposes severe constraints on the displacement of atoms, destroying the bulk tetragonal soft mode in thin ferroelectric films. This does not, however, quench local polarization. If the interface bonding is sufficiently strong the ground state represents a ferroelectric double-domain structure, driven by the intrinsic oppositely-oriented dipole moments at the two interfaces. Although the critical thickness for the net polarization of KNbO3 film is finite - about 1 nm for Pt and 1.8 nm for SrRuO3 electrodes - local polarization persists down to thickness of a unit cell.Comment: 5 pages, 4 figure

DWT Feature Extraction Based Face Recognition using Intensity Mapped Unsharp Masking and Laplacian of Gaussian Filtering with Scalar Multiplier

AbstractFace recognition under varying illumination and poses at certain angles is challenging, and hence improved edge prominence and contrast enhancement techniques are an effective approach to solve this problem. This paper proposes two novel techniques, namely, Intensity Mapped Unsharp Masking (IMUM) which provides a much finer outline of the face image by reducing the background intensity, and Laplacian of Gaussian based filtering with Scalar Multiplier (LOGSM) which provides an improved edge detection. Individual stages of the FR System are examined and an attempt is made to improve each stage. A Binary Particle Swarm Optimization (BPSO) based feature selection algorithm is used to search the feature vector space for the optimal feature subset. Experimental results, obtained by applying the proposed algorithm on ORL, UMIST, Extended YaleB, ColorFERET face databases, show that the proposed system outperforms other FR systems. A significant increase in the overall recognition rate and a substantial reduction in the selected features are observed

Prediction of a Switchable Two-Dimensional Electron Gas at Ferroelectric Oxide Interfaces

The demonstration of a quasi-two-dimensional electron gas (2DEG) in LaAlO3=SrTiO3 heterostructures has stimulated intense research activity in recent years. The 2DEG has unique properties that are promising for applications in all-oxide electronic devices. For such applications it is desirable to have the ability to control 2DEG properties by external stimulus. Here, based on first-principles calculations we predict that all-oxide heterostructures incorporating ferroelectric constituents, such as KNbO3=ATiO3 (A = Sr, Ba, Pb), allow creating a 2DEG switchable between two conduction states by ferroelectric polarization reversal. The effect occurs due to the screening charge at the interface that counteracts the depolarizing electric field and depends on polarization orientation. The proposed concept of ferroelectrically controlled interface conductivity offers the possibility to design novel electronic devices

Atomic and Electronic Structure of CoFeB/MgO Interface from First Principles

First-principles calculations of the atomic and electronic structure of crystalline CoFeB/MgO/CoFeB magnetic tunnel junctions (MTJs) are performed to understand the effect of B on spin-dependent transport in these junctions. The authors find that it is energetically favorable for B atoms to reside at the crystalline CoFeB/MgO interface rather than remain in the bulk of the crystalline CoFeB electrode. The presence of B at the interfaces is detrimental to tunneling magnetoresistance (TMR) because it significantly suppresses the majority-channel conductance through states of symmetry. Preventing B segregation to the interfaces during annealing should result in an enhanced TMR in CoFeB/MgO/CoFeB MTJs

Effect of oxygen vacancies on spin-dependent tunneling in Fe/MgO/Fe

First-principles calculations based on density functional theory are used to elucidate the effect of O vacancies, forming F centers, on spin-dependent tunneling in Fe/MgO/Fe(001) magnetic tunnel junctions. O vacancies produce occupied localized s states and unoccupied resonant p states, which is consistent with available experimental data. The authors find that O vacancies affect the conductance by nonresonant scattering of tunneling electrons causing a substantial reduction of tunneling magnetoresistance (TMR). Improving the quality of the MgO barrier to reduce O vacancy concentration would improve TMR in these and similar junctions