Search

The diesel engine performance as well as exhaust emission attributes are influenced by different structures. Impact of compression ratio and microalgae biodiesel blending proportion in petroleum diesel on variable compression ratio diesel engine performance and exhaust emission have been investigated in this study. The five blends of microalgae have been prepared on volumetric basis adopting standard procedure. The engine is fuelled with these five blends respectively to investigate their impact on engine performance and emission attributes. The experimentation has carried out at compression ratio 15.5, 16.5, and 17. For benchmarking comparison, the obtained results have been compared to test results found using petroleum diesel as fuel. Obtained experimental results have uncovered that the engine brake thermal efficiency increases as compression ratio increases for all the microalgae biodiesel blends. The brake specific fuel consumption diminishes with rise of compression ratio for tested fuel blends. The outcomes additionally show brake specific fuel consumption stay higher for blends and increase with rise of biodiesel mixing percent contrasted with unadulterated diesel. At the point when compression ratio has expanded from 15.5 to 17.5, the hydrocarbons and carbon monoxides outflow have reduced radically and nitrogen oxides discharge increases. [ABSTRACT FROM AUTHOR]

Highly altered granitoids in the western part of Bundelkhand craton around Kanchanpur and Thuni villages in Shivpuri district, Madhya Pradesh, India, are significantly associated with copper-molybdenum-tungsten mineralization which is manifested as stringers, blebs, clots and fine specks of chalcopyrite, pyrite, molybdenite and scheelite and as vein-fillings associated with hydrothermal alteration within the ore zone and adjacent host rocks. The cumulative strike length of the zone of mineralization (NW-SE) and associated alteration is around 3.5 km. Various mineral assemblages, viz. Kfeldspar-biotite-chlorite, K-feldspar-sericite-chlorite and quartz-epidote-chlorite-sericite indicate intense hydrothermal alteration in the area. Analytical results have shown anomalous values for Cu (up to 1530 ppm), Mo (up to 4080 ppm) and W (up to 1449 ppm). Field observations and chemical analysis have been further supplemented by ore microscopic, petrographic, geochemical and EPMA studies to identify sulphide phases (of Fe, Cu and Mo) and scheelite. All the field and laboratory studies collectively indicate a probable hydrothermal origin of mineralization in the study area. The present study on Cu, Mo and W mineralization of economic grade in the western Bundelkhand craton has important implications for further metallogenic studies and mineral exploration in the area. [ABSTRACT FROM AUTHOR]

Background and Objectives: In portal hypertension, gastric varix-associated bleeding is known to have higher transfusion requirements, uncontrolled bleeding, rebleeding, intensive care unit requirements, and death. EUS-guided coil insertion is now an acceptable modality for endoscopic management in cases of gastric varices. With this study, we discuss our large single-center experience in the use of EUS for coil and glue injection in gastric varices. We also look into adverse events associated with and possibilities of using this modality as both primary prophylaxis and a rescue therapy., Methods: The study was conducted in a tertiary care center in India. A total of 86 patients were included in the study. The indication for EUS-guided coil and glue was divided into 3 clinical situations, namely, rebleed, rescue, and primary. The technical success and clinical success, that is, control of bleed in patients, were confirmed by absence of Doppler signal on EUS, endoscopic view, and stabilized hemoglobin with no need of blood product transfusion to maintain hemoglobin., Results: The mean Child-Turcotte-Pugh score and Model for End-Stage Liver Disease-Na score were 9.2 and 14.6, respectively. The mean size of the gastric varices was 18.9 mm. The mean number of coils used was 2.9, and the average quantity of glue required was 1.6 mL. The technical success was 100% across the patient group. Clinical success was seen in 90% of the patient group. Mean follow-up was seen for 175.2 days., Conclusions: EUS-guided coil and glue therapy has a role in different clinical settings, as primary therapy, rebleed, and rescue therapy. It has significant technical and clinical success. Its role in treatment algorithms needs to be further studied in prospective studies. It may offer a cost advantage in comparison to interventional radiology-led interventions., Competing Interests: All authors have no conflict of interest to declare., (Copyright © 2023 The Author(s). Published by Wolters Kluwer Health, Inc on behalf of Scholar Media Publishing.)

Acid, alkaline and enzymatic hydrolysis of agricultural crop wastes were compared for yields of total reducing sugars with the hydrolysates being evaluated for ethanol production using a mixed culture of Zymomonas mobilis and Candida tropicalis. Acid hydrolysis of fruit and vegetable residues gave 49-84 g reducing sugars l(-1) and 29-32 g ethanol l(-1) was then obtained. Alkaline hydrolysis did not give significant amount of reducing sugars. Enzymatic hydrolysis of fruit and vegetable residues yielded 36-123 g reducing sugars l(-1) and 11-54 g ethanol l(-1).