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V. Bharath V. Auradi G. B. Veeresh Kumar Madeva Nagaral Murthy Chavali Mahmoud Helal Rokayya Sami NI Aljuraide Jong Wan Hu Ahmed M. Galal 《Materials》2022,15(12)
The paper focused on an experimental study on the microstructural, mechanical, and wear characteristics of 15 wt.% alumina (Al2O3) particulates with an average particle size of 20 µm, reinforced in Al2014 alloy matrix composite as-cast and heat-treated samples. The metal matrix composite (MMC)samples were produced via a novel two-stage stir-casting technique. The fabricated composite samples were subjected to evaluate hardness, tensile strength, fatigue behavior and wear properties for both as cast and T6 heat-treated test samples. The Al2014 alloy and Al2014-15 wt.% Al2O3 MMCs were in solution for 1 h at a temperature of 525 °C, quenched instantly in cold water, and then artificially aged for 10 h at a temperature of 175 °C. SEM and X-ray diffraction analyses were used to investigate the microstructure and dispersion of the reinforced Al2O3 particles in the composite and the base alloy Al2014. The obtained results indicated that the hardness, tensile and fatigue strength and wear resistance increased when an amount of Al2O3 particles was added, compared to the as-cast Al2014 alloy and it was observed that after subjecting the same composite samples to heat treatment, there was further enhancement in the mechanical and wear properties in the Al2014 matrix alloy and Al2014-15 wt.% Al2O3 composite samples. 相似文献
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Venugopal R.Bovilla Preethi G.Anantharaju Sireesh Dornadula Prashanthkumar M.Veeresh Mahadevaswamy G.Kuruburu Vidya G.Bettada Kunka Mohanram Ramkumar SubbaRao V.Madhunapantula 《Asian Pacific Journal of Tropical Biomedicine》2021,(6):244-253
Objective: To assess the nuclear factor-erythroid 2-related factor-2 (Nrf2) modulatory effect of caffeic acid and protocatechuic acid and determine the anti-tum... 相似文献
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Sandip Jaju Mahesh Palkar Veeresh Maddi Pradeepkumar Ronad Shivalingarao Mamledesai Darbhamulla Satyanarayana Mangala Ghatole 《Archiv der Pharmazie》2009,342(12):723-731
A novel series of 14 new isonicotinyl hydrazide derivatives 2a – g , 3a – g containing a 4‐thiazolidinone / 2‐azetidinone nucleus were synthesized by reacting N′‐substituted arylidene / heteroarylidene isonicotinyl hydrazide 1a – g with thioglycollic acid in the presence of dry benzene and with chloroacetyl chloride in the presence of triethylamine, respectively. Structures of all newly synthesized compounds were characterized on the basis of elemental analyses and spectral data (IR and 1H‐NMR). All the title compounds were tested for their in‐vitro antimycobacterial activity against Mycobacterium tuberculosis H37Rv using Alamar‐Blue susceptibility test, and the activity is expressed as the minimum inhibitory concentration (MIC) in μg/mL. Among the series, compounds 2b , 2g , 3b , and 3g displayed an encouraging antimycobacterial activity profile as compared to that of the reference drugs isoniazid / rifampicin. 相似文献
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Veeresh F. Manvi Mahadev Dixit Kini Srinivas Anand Vagarali Sharan Patil Nidhi Goel Manvi 《Journal of Cardiovascular Echography》2013,23(2):60-65
Objective:
To determine the accuracy of epicardial echocardiography in detecting residual lesions after surgical repair of congenital heart defects. To determine the sensitivity, specificity, positive predictive valve, negative predictive valve, and false negative and false positive percentage of the same.Materials and Methods:
One year hospital-based prospective study of epicardial echocardiography in patients undergoing cardiopulmonary bypass for surgical correction of congenital heart defects in children and adults.Results:
Epicardial echocardiography was done in 158 patients. Residual lesions were detected in 38 patients by epicardial echocardiography. In 28 of these cases the residual lesions were significant. In 24 of them immediate reoperation was done with good outcome. Epicardial echo has high sensitivity, specificity, positive and negative predictive valve, in detecting residual lesion with congenital heart defects.Conclusion:
Routine use of intraoperative epicardial echocardiography allows detection of majority of residual defects. It has high accuracy. There were no complications associated with use of epicardial echocardiography. The use of transesophageal echocardiography (TEE) can be avoided in small children and neonates undergoing cardiac surgery. 相似文献6.
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Mohd Ismail Ali Hari Durga Prasad Kondreddi B. Veeresh 《European journal of pharmacology》2013,698(1-3):397-403
Oxidative stress is one of the major causative factors for development of benign prostatic hyperplasia (BPH). The aim of the present study is to evaluate the effect of 2-hydroxy-4-methoxy benzoic acid (HMBA), a potential antioxidant on testosterone induced BPH in rats. Male Wistar rats were divided into five groups (n=6), Group I—received saline, Group II—received testosterone (3 mg/kg/s.c.), Group III—received testosterone+finasteride (5 mg/kg/oral), Group IV and V received testosterone+HMBA (200 and 400 μg/kg/i.p.), respectively, for 21 days. Animals were weighed before and after the study period. On 22nd day, animals were humanly killed by cervical dislocation. Prostates were excised and weighed, and used for biochemical and histological studies. As a result, testosterone treated rats showed increased prostate weight; prostatic index accompanied with depleted antioxidant enzymes levels, elevated lipid peroxides and total nitrite and associated histology disruption. HMBA treatment at 200 μg/kg/i.p. and 400 μg/kg/i.p. significantly restored (P<0.05) antioxidant enzyme levels, lipid peroxide and total nitrite when compared to disease control animals. It also ameliorated the testosterone induced histological changes. The present study suggests the protective role of HMBA on testosterone induced BPH by virtue of its antioxidant potential. 相似文献