Steroidi i poliketidi iz kore biljke Uvaria hamiltonii

Two known steroids, stigmasterol and 6beta-hydroxystigmasta-4,22-dien-3-one (1) and two unusual polyketides, cis-4-hydroxymellein (2) and trans-4-hydroxymellein (3) were isolated from the stem bark of Uvaria hamiltonii. The structures of the compounds were elucidated independently by high-resolution 2D-NMR techniques and confirmed by comparison with previously reported values.Dva poznata steroida, stigmasterol i 6-hidroksistigmasta-4,22-dien-3-on (1) i dva neuobičajena poliketida, cis-4-hidroksimelein (2) i trans-4-hidroksimelein (3) izolirana su iz kore biljke Uvaria hamiltonii. Strukture spojeva određene su neovisno 2D-NMR spektroskopijom visoke rezolucije i usporedbom s literaturnim podacima

Analysis and Review of Mathematical Concepts in Quantum Computation

The basic principle behind quantum computation is that quantum properties can be used to represent data and perform operations on these data. Mathematics lies at the heart of quantum computation and it is needed in every aspect of the research and development of quantum computation. In this paper we have presented mathematical concepts that are closely related to quantum computation and their relation to quantum mechanics in a way which is innovative and very easy to comprehend. Most of the mathematical concepts presented in this paper are deduced from the postulates of quantum mechanics and linear algebra. Keywords: Quantum computation, quantum mathematics, quantum gate, quantum operator, reversible computing, parallel computing

Effect of Bunch-Trimming on Yield and Quality in Banana

The experiment consisted of different intensities of hand removal viz. 1,2 and 3 hands (H1, H2 and H3 respectively) and time of hand removal i.e., immediately after opening of last hand (T1), one week after opening of last hand (T2), and two weeks after opening of last hand (T3). Results were statistically analysed using augmented 2 factor factorial CRD. The time of hand removal did not show any significant difference on yield while hand weight, finger weight, finger length, finger diameter and volume of finger increased with the increase in number of hands removed. It is suggested that removal of three hands between one and two weeks after opening of last hand is beneficial for improving yield and finger quality of banana cv. Martaman (Musa AAB)

Inverse sinusoidal pulse width modulation switched electric vehicles’ battery charger

This paper documents an efficient, cost-effective and sustainable grid-connected electric vehicles (EVs) battery charger based on a buck converter to reduce the harmonics injected into the mains power line. To utilize the switching converter as an effective power factor controller (PFC), inverse sinusoidal pulse width modulation (ISPWM) signals have been applied. A mathematical relationship between the sending-end power factor and the duty ratio of the switching converter has been presented. To ensure the sustenance of the proposed method, a simulation model of the proposed battery charging system has been tested on PSIM simulation platform. The simulation results yield to a lossless charging system with a sending-end power factor close to unity. An experimental testbed comprising a 60 V battery bank of 100 A-h capacity with a charging current of 7 A has been generated. The laboratory assessments present an 88.1% efficient charging prototype with a resultant sending-end power factor of 0.89. The laboratory framework concerns with the comparative analysis of the power efficiency, sending-end power factor and lines current total harmonic distortion (THD) values obtained for different charging methods and the evaluations corroborate the reliability of the proposed work

New Algorithm For Detection of Spinal Cord Tumor using OpenCV

The spinal cord one of the most sensitive and significant parts of the human body lies protected inside the spine the backbone and contains bundles of nerves Any minor problem in the spinal cord can cause debilitation of internal and external functions of the human body One of the complications in the spinal cord is tumor - abnormal growth of tissue In this project we present a new algorithm based on OpenCV to detect spinal cord tumors from MRI sagittal image without human intervention The new algorithm can detect tumor-like substances adjacent to the spinal cord Tests carried out on spinal cord MRI images 33 cervical spinal images showed approximately 90 91 of accuracy rate in detecting tumor