Experimental investigation on bacterial concrete strength with Bacillus subtilis and crushed stone dust aggregate based on ultrasonic pulse velocity
Publication date: Available online 16 February 2020Source: Materials Today: ProceedingsAuthor(s): C. Venkata Siva Rama Prasad, T.V.S. Vara LakshmiAbstractThe healing proportion of strengthening cracks in buildings such as Reinforced cement concrete (RCC) Houses, RCC Pipes, Canal Lining, Pavement etc. has been increased in the ongoing bacterial concrete. In order to fix the cracks in the concrete, it needs ordinary maintenance and exceptional treatment that can be terribly expensive. This is another method adopted by the use of microbiologically actuated calcite (CaCO3) precipitation in the arrangement of concrete. In this paper, an experimental study carried out using Bacillus subtilis bacteria and calcium lactate to heal the cracks in the concrete at different percentages such as 5%, 10% and 15% of cement weight for concrete grade M40. This paper presents the experimental results of the Ultrasonic Pulse Velocity (UPV) test carried out on Bacterial Concrete. From the Ultra sonic pulse velocity, dynamic modulus of elasticity and quality of concrete was determined at different ages. Relationships have been proposed between the strength of Bacterial concrete and UPV. Scanning Electronic Microscopy analysis carried out on convention and bacterial concrete. Finally the maximum strength attain at 10% bacterial replacement in concrete and Scanning electronic microscopy shows the calcium carbonate formation in concrete which is healing the cracks.
Publication date: Available online 4 April 2020Source: Tribology InternationalAuthor(s): V.S. Mello, E.A. Faria, S.M. Alves, C. Scandian
Publication date: Available online 4 April 2020Source: Radiation Physics and ChemistryAuthor(s): R.S. Omar, S. Hashim, S.K. Ghoshal, D.A. Bradley, N.D. Shariff
A Batavia hospital has submitted plans for a $7.8 million expansion, a re-do on a plan first announced two years ago. The United Memorial Medical Center project includes a 5,000-square-foot imaging department addition to house a new MRI, CT scanner, and additional X-Ray room plus a new morgue. It’s the first phase of a three-phase plan at the 131-bed hospital, which was initially submitted to the state Depart ment of Health this week in an $18 million proposal that went on to receive approvals…
CONCLUSIONS: In Romanian population, the MMC of mandibular first molars, when present, is commonly associated with a second distal canal, unlike the mandibular second molars where the occurrence of a MMC was associated with only one distal canal. When performing the preoperative evaluation, it has also to be considered the patient gender, since the male∕female ratio of MMC was 1:3 in mandibular first molars and 5:1 in mandibular second molars. PMID: 32239106 [PubMed - in process]
CONCLUSION: In the early stage of COVID-19 CRP levels were positively correlated with lung lesions and could reflect disease severity. PMID: 32243911 [PubMed - as supplied by publisher]
CONCLUSION: The septal swell body is a dynamic structure that varies in width over time in close correlation to the inferior turbinates. Further research is required to quantify its relevance as a surgical area of interest. PMID: 32241312 [PubMed - as supplied by publisher]
CONCLUSION: There is a good correlation between the clinical symptoms and lateralisation of hydropic changes on magnetic resonance imaging. Further refinements of imaging techniques and grading system will likely improve the diagnostic accuracy and clinical utilisation of hydrops magnetic resonance imaging. PMID: 32241307 [PubMed - as supplied by publisher]
Publication date: December 2019Source: Revista Portuguesa de Cardiologia (English Edition), Volume 38, Issue 12Author(s): Diogo Cavaco, Pedro Carmo, João Mesquita, Maurício Scanavacca, Pedro Adragão
To characterize the dorsal ulnar corner fragment with regard to size and morphology using 3-dimensional software and computed tomography (CT) scans, as it presents in low-energy intra-articular distal radius fractures occurring in the female postmenopausal population.
ConclusionOur study estimated the number of stroke patients undergoing CTA for suspected LVO and those eligible for thrombectomy in relation to the population. Numbers were essentially the same throughout the week, and during office and on-call hours. Our data can be used to make adequate staffing plans.