Studies on Formulation and Evaluation of Ethyl Cellulose Based Extended Release Metformin Hydrochloride Matrix Tablets

Monolithic matrix tablets of metformin hydrochloride were formulated as extended release tablets by employing ethyl cellulose polymer and the extended release characterization of the formulated tablets was investigated.  Extended release matrix tablets containing 500 mg metformin hydrochloride were developed by changing concentration of drug :  polymer (EC) in the ratio of 5:1, 5:2, 5:3 and 5:4 by direct compression.  Formulations were optimized based on the acceptable tablet properties invitro and invivo drug release.  The resulting formulations produced robust tablets with optimum hardness, weight variation, drug content and low friability.  The result of invitro and invivo drug release studies indicated that formulation (drug:polymer =5:3), is the most successful of the study and exhibited constant and extended release of metformin hydrochloride 99-100.5% release at the end of 10 h compared with reference standard.  Further, the formulation F3 was subjected to exposure at room and accelerated condition to stability studies.  A decrease in release of the drug was observed on increasing polymer ratio at certain level.  Before tablet compression, the resulting formulation blends were evaluated for angle of repose, bulk density, % porosity, % compressibility index and drug polymer compatibility study of drug and excipients.  The t25, t50 and t90 drug release values was calculated from selected formulation F3 on every month of stability studies and comparision of both room and accelerated condition by statistical t-test, there is no difference between storage temperature. The formulation F3 was showed similar invitro and invivo drug release when compared to marketed sustained release tablet (F5M)

Closed Form Expressions for Delay to Ramp Inputs for On-Chip VLSI RC Interconnect

In high speed digital integrated circuits, interconnects delay can be significant and should be included for accurate analysis. Delay analysis for interconnect has been done widely by using moments of the impulse response, from the explicit Elmore delay (the first moment of the impulse response) expression, to moment matching methods which creates reduced order trans impedance and transfer function approximations. However, the Elmore delay is fast becoming ineffective for deep submicron technologies, and reduced order transfer function delays are impractical for use as early-phase design metrics or as design optimization cost functions. This paper describes an approach for fitting moments of the impulse response to probability density functions so that delay can be estimated accurately at an early physical design stage. For RC trees it is demonstrated that the inverse gamma function provides a provably stable approximation. We used the PERI [13] (Probability distribution function Extension for Ramp Inputs) technique that extends delay metrics for ramp inputs to the more general and realistic non-step inputs. The accuracy of our model is justified with the results compared with that of SPICE simulations. Keywords¾ Moment Matching, On-Chip Interconnect, Probability Distribution function, Cumulative Distribution function, Delay calculation, Slew Calculation, Beta Distribution, VLSI

Utilization of phosphorus for casein biosynthesis in the mammary gland. II. Incorporation of P<SUP>32</SUP> into free phosphopeptides of milk and of mammary gland

This article does not have an abstract

An Intelligent FPGA Based Anti-Sweating System for Bed Sore Prevention in a Clinical Environment

Bed sores, a common problem among immobile patients occur as a result of continuous sweating due to increase in skin to bed surface temperature in patients lying on same posture for prolonged period. If left untreated, the skin can break open and become infected. Currently adopted methods for bed sores prevention include: use of two hourly flip chat for repositioning patient or use of air fluidized beds. However, the setbacks of these preventive measures include either use of costly equipment or wastage of human resources. This paper introduces an intelligent low cost FPGA based anti-sweating system for bed sores prevention in a clinical environment. The developed system consists of bed surface implanted temperature sensors interfaced with an FPGA chip for sensing the temperature change in patient’s skin to bed surface. Based on the temperature change, the FPGA chip select the - mode (heater/cooler) and speed of the fan module. Furthermore, an alarm module was implemented to alert the nurse to reposition the patient only if patient’s skin to bed surface temperature exceeds a predefined threshold thereby saving human resources. By integrating the whole system into a single FPGA chip, we were able to build a low cost compact system without sacrificing processing power and flexibility

Studies on Genetic Divergence in Pomegranate (Punica granatum L.) Using SRAP Markers

Pomegranate genotypes have been characterized mainly on the basis of morphological traits; but, these traits are affected to a large extent by environmental and cultivation conditions, resulting in their ambiguous discrimination. Molecular markers are more suited for accurate discrimination of genotypes and cultivars. Sequence-Related Amplified Polymorphism (SRAP) markers were used in the present study to analyze polymorphism among the important pomegranate genotypes grown in India. The total number of bands generated by 30 SRAP primers for 12 genotypes was 1448, with an average of 48.3 bands per primer. Polymorphism varied from 2.7 to 73.9, with an average of 40.95%. Similarity-value based on Jaccard's Coefficient ranged from 0.63 (between cvs. Naina and Amlidana) to 0.95 (between cvs. Kabul Yellow and Jalore Seedless). UPGMA (un-weighted pair group method with arithmetic mean) analysis was performed and a dendrogram was constructed using Jaccard's similarity matrix. The 12 genotypes used grouped into 5 clusters. SRAP markers were found suitable for determining variability among the pomegranate genotypes studied

A test architecture design for SoCs using ATAM method

Test arranging is a basic issue in structure on-a-chip (S.O.C) experiment mechanization. Capable investigation designs constrain the general organization check request time, keep away from analysis reserve conflicts, in addition to purpose of restriction control disseminating in the midst of examination manner. In this broadsheet, we absent a fused method to manage a couple of test arranging issues. We first present a system to choose perfect timetables for sensibly evaluated SOC’s among need associations, i.e., plans that spare alluring orderings among tests. This furthermore acquaints a capable heuristic estimation with plan examinations designed for enormous S.O.Cs through need necessities in polynomial occasion. We portray a narrative figuring with the purpose of uses pre-emption of tests to secure capable date-books in favour of SOCs. Exploratory marks on behalf of an educational S-O-C plus a cutting edge SOC exhibit with the aim of capable investigation timetables be able to subsist gained in sensible CPU occasion

3D Printing: The Dawn of a New Era in Manufacturing

Printing is a process for reproducing text and images, typically with ink on paper using a print press.3D printing is method of converting a virtual 3D model into a physical object from a digital file. It is achieved using Additive Process, where an object is created by laying down successive layers of material until the entire object is created.3D printing could revolutionize and reshape the world. Advances in 3D printing technology can significantly change and improve the manufacturing world with effects on energy use, waste reduction, customization, product availability, medicine, art, construction and science. By using this technology it becomes easier to transmit designs for new objects around the world

Magneto-optics of massive Dirac fermions in bulk Bi2Se3

We report on magneto-optical studies of Bi2Se3, a representative member of the 3D topological insulator family. Its electronic states in bulk are shown to be well described by a simple Dirac-type Hamiltonian for massive particles with only two parameters: the fundamental bandgap and the band velocity. In a magnetic field, this model implies a unique property - spin splitting equal to twice the cyclotron energy: Es = 2Ec. This explains the extensive magneto-transport studies concluding a fortuitous degeneracy of the spin and orbital split Landau levels in this material. The Es = 2Ec match differentiates the massive Dirac electrons in bulk Bi2Se3 from those in quantum electrodynamics, for which Es = Ec always holds.Comment: 5 pages, 3 figures and Supplementary materials, to be published in Physical Review Letter

New spectrophotometric techniques for the estimation of Perphenazine in bulk drug form

Perphenazine is an atypical antipsychotic drug. &nbsp;The simple and accurate and precise absorption ratio method has been developed for the simultaneous estimation of Perphenazine in the pure drug form. The absorption maxima were found to be 310nm in Method A (0.1N HCl Buffer) and show linearity over the concentration range of 0.002-0.02 µg/mL with regression equation y=0.5372x-0.0099(r2 = 0.9990). In Method B (Sodium acetate buffer, pH 4.5) the drug obeys Beer Lambert’s law (λmax 310nm) in the concentration range of 0.002-0.02 µg/mL with regression equation y=0.4257x - 0.0084(r2= 0.9992). In Method C (Phosphate buffer, pH 6.8) the drug obeys Beer Lambert’s law (λmax 310nm) in the concentration range of 0.002-0.02 µg/mL with regression equation y=0.482x - 0.0074(r2= 0.9991). In Method D (phosphate buffer, pH 7.2) the drug obeys Beer Lambert’s law (λmax 310nm) in the concentration range of 0.002-0.02 µg/mL with regression equation y=0.3686x - 0.0055(r2= 0.9992). In Method E (0.1N NaOH Buffer) and shows linearity over the concentration range of 0.002-0.02 µg/mL with regression equation y=0.4864x-0.0081(r2 = 0.999). In Method F (Methanol) the drug obeys Beer Lambert’s law (λmax 300nm) in the concentration range of 0.002-0.02 µg/mL with regression equation y=0.6323x - 0.003(r2= 0.999). In Method G (Ethanol ) the drug obeys Beer Lambert’s law (λmax 300nm) in the concentration range of 0.002-0.02 µg/mL with regression equation y=0.3686x - 0.0055(r2= 0.9991). &nbsp;&nbsp;First derivative spectrophotometric methods (A1, B1, C1, D1, E1, F1 and G1) were developed in 0.1NHCl and Sodium acetate pH 4.5 and phosphate buffer, in pH 6.8 and phosphate buffer, pH 7.2, 0.1N NaOH Buffer, which Perphenazine obeys Beer Lambert’s law(λmax310nm) in the concentration range of 0.002-0.02 µg/mL and &nbsp;0.002-0.02 µg/mL and &nbsp;&nbsp;&nbsp;0.002-0.02 µg/mL&nbsp; and 0.002-0.02 µg/mL and0.002-0.02 µg/mL &nbsp;with regression equations y=0.0357x - 0.0006 and y=0.0201x+0.0004 and y=0.0196x-0.0002 and y=0.0162x+0.0002 &nbsp;and y=0.0239x - 0.0002 &nbsp;and Perphenazine obeys Beer Lambert’s law(λmax300nm) for methanol and ethanol in the concentration range of 0.002-0.02 µg/mL and &nbsp;0.002-0.02 µg/mL&nbsp; with regression equations y=0.0423x-0.0003 and y=0.0371x+0.0003 respectively.&nbsp