877 research outputs found
Can quasi-periodic gravity waves influence the shape of ice crystals in cirrus clouds?
No full textThis is the Raman Lidar data recorded at Physical Research Laboratory (PRL), Ahmedabad, India owned by PRL and maintained by Dr. Som Kumar Sharma. Associate Professor and Mrs. Sourita Saha, Sci./Engg.-SC
Data (RCS_20Feb2016.mat) is Range Corrected Signal on 20th Feb 2016 and the corresponding time (time_20Feb2016.mat) in UTC and height(height.mat) in km are provided.</p
Fabrication of nanoadjuvant with poly-ɛ-caprolactone (PCL) for developing a single-shot vaccine providing prolonged immunity [Corrigendum]
No full textPrashant CK, Bhat M, Srivastava SK, et al. Int J Nanomedicine. 2014;9:937–950.On page 937, the author affiliations have been listed incorrectly. The correct author list is as follows:Chandravilas Keshvan Prashant1Madhusudan Bhat2Sandeep Kumar Srivastava2Ankit Saxena3Manoj Kumar4Amar Singh3Mohammed Samim5Farhan Jalees Ahmad6Amit Kumar Dinda21Faculty of Engineering and Interdisciplinary Sciences, Jamia Hamdard, New Delhi, India; 2Department of Pathology, 3Department of Transplant Immunology and Immunogenetics, All India Institute of Medical Sciences, New Delhi, India; 4Centre for Biomedical Engineering, Indian Institute of Technology, New Delhi, India; 5Department of Chemistry, Faculty of Science, Jamia Hamdard, New Delhi, India; 6Department of Pharmaceutics, Faculty of Pharmacy, Jamia Hamdard, New Delhi, IndiaRead the original articl
Tribology of Polycarbonate Urethane for a Permanent Meniscus Implant in the Simulated Synovial Fluid
No full textMeniskus má klíčovou funkci jako tlumiče a stabilizátor uvnitř kolenního kloubu při chůzi, sportovní aktivity, a mnoho dalších denních pohybů během našich životů. Menisku slzy jsou velmi pravděpodobné, u mladých a aktivních dospělých kvůli extrémním pohybům při sportovních aktivitách. Buď pokud roztrhané meniskus se neléčí, nebo odstranit meniskektomie, jak povede k osteoartrózy. Tedy, je-li přítomna utržený meniskus, je třeba jej nahradit menisku protézy, aby se zabránilo poškození chrupavky nebo osteoartróza způsobené slzy. Polykarbonátové Uretan (PCU), byla dobře studována jako menisku protézy kandidáta, přesto jeho tribologické vlastnosti v synoviální kolenního kloubu prostředí nebyly zkoumány. Prvním cílem této studie bylo zjistit vliv různých synoviální tekutiny (SF), komponent na koeficient tření (COF), měřená mezi kloubních chrupavek a PCUs a případné vzniklé opotřebení chrupavky. Druhým cílem bylo zjistit vliv povrchové úpravy PCUs, tj Bionate 80A, Bionate II80A, Bionate 80AS, Bionate 80A2F na měřené COF a opotřebení rychlost chrupavky. Třetí Cílem této studie bylo zjistit, zda nahrazení zdravého menisku s PCUs způsobil poškození chrupavky. Čtvrtý Cílem této studie bylo zkoumat účinek experimentu času na COF a opotřebení. Univerzální Mechanické Tester Bruker je (UMT-3) byl použit k měření COF mezi kloubní chrupavky a PCUs v různých chemických roztok z nejméně do nejvíce kompletní simulované SF. Histologie byla prováděna zkoumat poškození chrupavky po experimentů. Výsledky této studie ukázaly, že přidání více složek, maziv na simulovanou SF neprokázaly snížil COF. Přesto, v nejúplnější simulované SF napodobuje přirozený SF, B80A a BII80A přineslo nejnižší COFS všech biomateriálů. Potvrzující, že COF a opotřebení nekorelují, B80AS ukázal nejmenší opotřebení rychlost všech Bionates zatímco zdravé meniskus nevykazovala žádné poškození chrupavky. Tak, výměna zdravého menisku s PCUs 2způsobil poškození chrupavky. Pokud jde o čas experimentovat, COF odvozený od 4 hodin experimentů byla vyšší než COF od 1 hodiny pokusy v této studiiThe meniscus has a crucial function as a shock absorber and stabilizer inside the knee joint during walking, sportsactivities, and many other daily movements during our lives. Meniscal tears are very probable in young and active adults due to extreme movementsduring sportsactivities. Either if a torn meniscus is left untreatedor removed by meniscectomy, bothlead to osteoarthritis. Thus, when a torn meniscus is present, it needs to be replaced with a meniscus implantto prevent cartilage damage or osteoarthritis caused by the tears. Polycarbonate Urethane (PCU) has been well studied as a meniscus implantcandidate, yet its tribological properties in the synovial knee joint milieu have not been investigated. The first aim of this study was to investigate the effect of differentsynovial fluid (SF) components on the coefficient of friction (COF)measured between articular cartilage and PCUsand possible resulting wear ofthe cartilage. The second aim wasto investigate the effect ofsurface modifications ofPCUs, i.e. Bionate 80A, Bionate II80A, Bionate 80AS, Bionate 80A2F on themeasuredCOF and wear rateofthe cartilage. The third aim of this study was to investigate whether replacement of healthy meniscus with PCUs caused cartilage damage. The fourthaim of this study wasto investigate the effect of experiment time on COFandwear. A Bruker's Universal Mechanical Tester (UMT-3)was used to measure the COF between articular cartilage and the PCUsin different solution chemistries from the least to the most complete simulated SF. Histology was performed to examine the damage o fthe cartilage after the experiments. The results of this study showed that adding more lubricant components to the simulated SF did not show any decreased COF. Yet, in the most complete simulated SF mimicking the natural SF, B80A and BII80Ayielded the lowest COFsof all the biomaterials. Confirming that COF and wear have no correlation, B80AS showed the least wear rateof all the Bionates while healthy meniscus did not cause any cartilage damage. In 4conclusion, replacement of healthy meniscus with PCUs caused cartilage damage. With respect to experiment time, increasing the time from 1up to 4 hours increased the measured COF
Correction: Sharma et al. Effects of Funneliformis mosseae and Potassium Silicate on Morphological and Biochemical Traits of Onion Cultivated under Water Stress. Horticulturae 2022, 8, 663
No full textThe Horticulturae Editorial Office wishes to make the following changes to the author’s paper [...
Carbon-dioxide corrosion in stainless steel (304L) pipes
No full textThis research comprehensively addresses challenges associated with carbon dioxide (CO2) corrosion in 304L stainless steel pipes, particularly under high temperatures and elevated CO2 partial pressures. Utilizing advanced simulation techniques with COMSOL Multiphysics, the corrosion behavior of 304L stainless steel is systematically investigated. Critical factors influencing corrosion rates, including operating temperature, reference temperature, initial electrolyte potential, and CO2 partial pressure, are identified. The study proposes practical mitigation strategies, such as employing more resistant materials like duplex stainless steel and applying protective coatings on inner pipe surfaces. The second study focuses on simulating and analyzing CO2 corrosion in 304L stainless steel pipes, aiming to address research gaps. The results facilitate the design and operation of systems utilizing 304L stainless steel in CO2 environments more effectively. Implementing measures to reduce PCO2 can diminish the corrosion rate, extending the system's lifespan
Marketing of renewable energy: emerging themes and their directions using interpretive structural modeling
No full textToday, the need for renewable energy is omnipresent as all the nations, including developed and developing economies, are struggling with environmental problems like ‘greenhouse gas emissions’, ‘climate change’, ‘increase in carbon footprints’, and ‘global warming’. Businesses are also getting affected to reshape their models for implementing effective marketing strategies to increase and satisfy the demand for renewable energies. This business shift has catered to the attention of business scholars across the globe. Despite the surge in interest of business scholars, the extent field appears to be fragmented and the factors leading to adoption of renewable energies at different levels are in their complex state. Therefore, our article sheds light on emerging themes using keyword analysis and integrates a model using Interpretive Structural Modeling (ISM) to structure the directions of the enablers of renewable energies. Our study guides academicians and policy makers regarding the milestones upon which the field has embarke
Development and Formulation of Novel Antimicrobial Peptides (AMPs) for Activity Against Staphylococcus Aureus
Full text linkThe first part of the project involves the development of new antimicrobial peptide (antibiotics). This will initially involve generating a peptide array by surveying the literature and using software programs such as quantitative structure-activity relationship (QSAR). The effectiveness of the peptide array against Staphylococcus aureus was tested at the Langara microbiology labs. The peptides (2-3 peptides) with the best activity will be further studied
Significance of the high charge state of projectile ions inside the target and its role in electron capture leading to target-ionization phenomena
Full text linkThe K x-ray spectra of different targets (Cu, Zn, and Ge) induced by 3-5 MeV/u Si projectile ions have been measured to determine the K-shell ionization cross section. A significant difference is observed between the measurements and theoretical estimates, with the latter being about 50% below the experimental results. This underestimation is attributed to the charge exchange from the target K shell to projectile K and L shells. Such an observation can only be possible if the projectile ions attain up to H- and He-like charge states. Corresponding projectile charge state fractions have been evaluated from the Lorentzian charge state distribution, where the mean charge state is taken from the Fermi gas model [W. Brandt, Phys. Rev. Lett. 30, 358 (1973)PRLTAO0031-900710.1103/PhysRevLett.30.358] and the width from the Novikov and Teplova approach [Phys. Lett. A 378, 1286 (2014)10.1016/j.physleta.2014.03.004]. The sum of the direct ionization cross section and K-K+K-L capture cross sections gives a good agreement with the measured cross sections. Furthermore, we have validated this methodology with available data for a Si ion on Ti target. Such results may be useful in many solid target-based applications.Fil: Chatterjee, Soumya. University Of Kalyani; IndiaFil: Sharma, Prashant. Weizmann Institute Of Science Israel; IsraelFil: Singh, Shashank. Panjab University; IndiaFil: Oswal, Mumtaz. No especifíca;Fil: Kumar, Sunil. No especifíca;Fil: Montanari, Claudia Carmen. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Mitra, D.. University Of Kalyani; IndiaFil: Nandi, T.. No especifíca
Spatiotemporal characteristics of high-density gas jet and absolute determination of size and density of gas clusters
No full text© 2020, The Author(s).Properties of gas clusters such as the size and number density when expanding into the vacuum after passing through a conical nozzle are analyzed for argon at an average density of 1020/cm3. Temporally and spatially resolved size and density distribution were measured from all-optical methods of Rayleigh scattering measurement and Nomarski interferometry using a CW laser. At the gas backing pressure of 80 bar, Ar clusters as large as 100 nm were obtained, which differs significantly from the size estimated by the conventional Hagena scaling law. The two independent methods of cluster characterization presented here would be useful to precisely determine the initial conditions in a variety of intense laser-cluster interaction driven applications such as neutron generation, thermonuclear fusion, efficient x-ray emission, and energetic ion acceleration.11sci
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