No abstract

Water soluble epoxy resins were prepared from male‐opimaric acid, linseed fatty acids and epoxy resin. The methylated urea formaldehyde resin and melamine formaldehyde resin were also prepared for curing purposes. The pigmented coating compositions were prepared from water soluble epoxy resins, red oxide and iron and zinc phosphate. These coating compositions showed good water resistance, acid resistance, alkali resistance and lubricating oil resistance.

This paper deals with the synthesis of water soluble electrodepositable epoxy resins from maleopimaric acid and epoxy resin. Water soluble methylated urea formaldehyde resin and melamine formaldehyde resin were also synthesised for curing purposes. The coating compositions were prepared from water soluble epoxy resins, water soluble MF resin, water soluble UF resin, red oxide of iron and zinc phosphate. Thereafter the optimum conditions for electrodeposition were determined in terms of voltage, time, solid contents, pH and bath temperature. These anodic electrocoatings had good film properties such as scratch hardness, flexibility, impact resistance and resistance to water, acid, alkali and solvent.

The present study focuses on, screening the anti-bacterial activities of methanol and chloroform extracts of the dried stem barks of Ziziphus xylopyrus. The anti-bacterial activities were evaluated against fifteen different bacterial strains by detecting minimum inhibitory concentration and zone of inhibition. The minimum inhibitory concentration (MIC) values were compared with control and zones of inhibition (ZOI) were compared with standard ciprofloxacin at concentration of 100 and 200 μg/mL. Among the two extracts, the methanolic extract showed better antibacterial activity compared to chloroform extract . The MIC values for different bacterial strains obtained were within the range of 100-300 μg/mL. The ZOI values showed that there was a little differences in the ZOI values between the standard and methanol extract within the range of 0.5 to 1mm. This was comparable with the standard drug. Anatomical, proximate analysis and chromatographic studies were also carried out to fulfill the botanical quality control standards.

BACKGROUNDChronic Obstructive Pulmonary Disease (COPD) is a disease state characterised by the presence of airflow obstruction due to chronic bronchitis or emphysema, which is progressive and partially reversible. Right ventricular failure (cor pulmonale) is a well-known complication of COPD. But, it also involves left ventricle leading to systolic as well as diastolic dysfunction, which maybe present with associated RV failure and also as a separate entity. Diastolic dysfunction is due to defective filling of the left ventricle because of the hyperinflated lung. On the other hand, systolic dysfunction maybe secondary to RV failure due to the effects of hypoxia in the cardiac muscle fibres as a part of the systemic hypoxaemia or it may be due to the effects of the circulatory inflammatory mediators leading to atherosclerosis and ischaemia of cardiac muscles.