LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 1335

Search options

  1. Book ; Online: Role of strain on the stability of B, C, N, and O in Iron

    Kishor, P. S. V. R. A. / Gollapalli, Prince / Misra, Debolina / Oza, Prajeet / Yadav, Satyesh Kumar

    2022  

    Abstract: The preference for the occupation of solute atoms like B, C, N, and O at various sites in iron is ... than distortion. In contrast, the relative stability of B, C, and N is dictated by the distortion it exerts ... on iron atoms. Contribution to the relative stability of B atoms is dictated mostly by distortion ...

    Abstract The preference for the occupation of solute atoms like B, C, N, and O at various sites in iron is generally explained by the size of the solute and the volume available for the solute atoms to occupy. Such an explanation based on the size of solute atoms and available space at the occupation site assumes that distortion alone dictates the stability of solute atoms. Using first-principles density functional theory (DFT), we separately calculate the distortion energy (DE) and electronic binding energy (EBE) of solute atoms in iron. We show that electronic binding dictates the relative stability of O rather than distortion. In contrast, the relative stability of B, C, and N is dictated by the distortion it exerts on iron atoms. Contribution to the relative stability of B atoms is dictated mostly by distortion. It suggests that B could occupy a large volume region like grain boundaries. The same agrees with experiments indicating B segregates at grain boundaries and planar defects. Such conclusions could not have been drawn from the formation energy calculation, which shows that B is stable at the substitution site.

    Comment: 8 pages,2 figures
    Keywords Condensed Matter - Materials Science
    Subject code 541
    Publishing date 2022-08-18
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  2. Article ; Online: Human immunodeficiency virus, hepatitis B virus and hepatitis C virus seroprevalence in critically ill emergency department patients at a Trauma Care Centre, India.

    Batra, P / Mathur, P / Bhoi, S / Thanbuana, B T / Nair, S / Balamurgan, M / Misra, M C

    Indian journal of medical microbiology

    2016  Volume 34, Issue 2, Page(s) 183–185

    Abstract: Introduction: Human Immunodeficiency Virus (HIV), Hepatitis B virus (HBV) and Hepatitis C virus ...

    Abstract Introduction: Human Immunodeficiency Virus (HIV), Hepatitis B virus (HBV) and Hepatitis C virus (HCV) are the most common occupationally acquired infections amongst the healthcare workers (HCWs) with critically ill patients attending the emergency department being the most common source of occupationally acquired infections. Therefore, the present study was conducted at a 165 bedded level-1 trauma centre of India to ascertain the seroprevalence rate of HIV, HBV and HCV; and thus the risk associated with the occupational exposure in a busy emergency setting of the developing world.
    Methodology: A retrospective, 7 years study (2007-2013) was carried out at the JPNA Trauma Centre of the 2,500 bedded All India Institute of Medical Sciences, New Delhi. Records of all patients whose serum samples were sent to the laboratory for viral markers testing were obtained and those falling in the red area were included.
    Results: A total of 11,630 patients were received in the red area; and samples from 7,650 patients were sent for testing. Seropositivity of HIV, HBV and HCV in these samples was 0.28%, 3.4% and 0.9% respectively. The number of samples received was lesser than the total number of patients received in the red area.
    Conclusion: Adopting Standard Precautions (SP) can be used as an easy method to decrease the risk of occupationally acquired infections.
    MeSH term(s) Adolescent ; Adult ; Aged ; Child ; Critical Illness ; Emergency Service, Hospital ; HIV/immunology ; HIV Infections/epidemiology ; Hepacivirus/immunology ; Hepatitis B/epidemiology ; Hepatitis B virus/immunology ; Hepatitis C/epidemiology ; Humans ; India/epidemiology ; Male ; Middle Aged ; Occupational Exposure ; Retrospective Studies ; Risk Assessment ; Seroepidemiologic Studies ; Trauma Centers ; Young Adult
    Language English
    Publishing date 2016-04
    Publishing country India
    Document type Journal Article
    ZDB-ID 1038798-5
    ISSN 1998-3646 ; 0255-0857
    ISSN (online) 1998-3646
    ISSN 0255-0857
    DOI 10.4103/0255-0857.180281
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article: Topological Frustration as a New Parameter to Tune Morphology Revealed through Exploring the Continuum between A-B-C 3-Arm Star and Linear Triblock Polymers

    Gupta, Rohit / Misra, Mayank / Zhang, Wenxu / Mukhtyar, Ankita / Gido, Samuel P / Ribbe, Alexander / Escobedo, Fernando A / Coughlin, E. Bryan

    Macromolecules. 2021 Apr. 20, v. 54, no. 9

    2021  

    Abstract: ... A-B-C architecture. A versatile strategy is reported to synthesize a series of well-defined graft ... polymers that lie along the unexplored continuum between a 3-arm star and an A-B-C linear triblock polymer ... C along the B chain was achieved. A series of discrete graft polymers (PMMA-b-PS-g-PEO) with fixed φ ...

    Abstract Block polymers assemble into a variety of phase-separated morphologies based on volume fraction (φ) and interactions (χ) of the respective blocks. The arrangement of three different polymer blocks could either be a 3-arm star, with each block having one terminus attached to a common junction point or a linear A-B-C architecture. A versatile strategy is reported to synthesize a series of well-defined graft polymers that lie along the unexplored continuum between a 3-arm star and an A-B-C linear triblock polymer architecture. Using the technique of single-molecule insertion, precise control over the position of graft arm C along the B chain was achieved. A series of discrete graft polymers (PMMA-b-PS-g-PEO) with fixed φ and prescribed ω values that lie on the continuum between a 3-arm star (ω = 0) and linear triblock polymer (ω = 1) were synthesized. Morphological studies using small-angle X-ray scattering and conventional and energy-filtered transmission electron microscopy reveal the transition between lamellae, perforated lamellae, and cylindrical morphologies with systematic variation in the ω values, a trend attributed to the topological frustration and the associated χ values between the three blocks. Molecular dynamic simulations of coarse-grained models were found to predict phase diagrams that are consistent with the experimentally observed morphologies. Our results suggest that changes in ω lead to topological frustration which is an important additional new design parameter that can be used to tune the morphology of multiblock polymers in addition to φ and χ.
    Keywords polymers ; small-angle X-ray scattering ; topology ; transmission electron microscopy
    Language English
    Dates of publication 2021-0420
    Size p. 4401-4411.
    Publishing place American Chemical Society
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 1491942-4
    ISSN 1520-5835 ; 0024-9297
    ISSN (online) 1520-5835
    ISSN 0024-9297
    DOI 10.1021/acs.macromol.1c00277
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  4. Article ; Online: Human immunodeficiency virus, hepatitis B virus and hepatitis C virus seroprevalence in critically ill emergency department patients at a Trauma Care Centre, India

    P Batra / P Mathur / S Bhoi / B T Thanbuana / S Nair / M Balamurgan / M C Misra

    Indian Journal of Medical Microbiology, Vol 34, Iss 2, Pp 183-

    2016  Volume 185

    Abstract: Introduction: Human Immunodeficiency Virus (HIV), Hepatitis B virus (HBV) and Hepatitis C virus ...

    Abstract Introduction: Human Immunodeficiency Virus (HIV), Hepatitis B virus (HBV) and Hepatitis C virus (HCV) are the most common occupationally acquired infections amongst the healthcare workers (HCWs) with critically ill patients attending the emergency department being the most common source of occupationally acquired infections. Therefore, the present study was conducted at a 165 bedded level-1 trauma centre of India to ascertain the seroprevalence rate of HIV, HBV and HCV; and thus the risk associated with the occupational exposure in a busy emergency setting of the developing world. Methodology: A retrospective, 7 years study (2007-2013) was carried out at the JPNA Trauma Centre of the 2,500 bedded All India Institute of Medical Sciences, New Delhi. Records of all patients whose serum samples were sent to the laboratory for viral markers testing were obtained and those falling in the red area were included. Results: A total of 11,630 patients were received in the red area; and samples from 7,650 patients were sent for testing. Seropositivity of HIV, HBV and HCV in these samples was 0.28%, 3.4% and 0.9% respectively. The number of samples received was lesser than the total number of patients received in the red area. Conclusion: Adopting Standard Precautions (SP) can be used as an easy method to decrease the risk of occupationally acquired infections.
    Keywords Bloodborne pathogens ; emergency department ; standard precautions ; Science ; Q ; Microbiology ; QR1-502
    Subject code 600
    Publishing date 2016-01-01T00:00:00Z
    Publisher Medknow Publications
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  5. Article ; Online: Hepatitis B and C co-infection in HIV patients.

    Bajaj, Sarita / Dwivedi, Manisha / Misra, Sri Prakash / Prajapati, Rajpal

    Indian journal of gastroenterology : official journal of the Indian Society of Gastroenterology

    2012  Volume 31, Issue 6, Page(s) 349–350

    MeSH term(s) Adolescent ; Adult ; Aged ; Alanine Transaminase/blood ; Alkaline Phosphatase/blood ; Aspartate Aminotransferases/blood ; CD4 Lymphocyte Count ; Coinfection/virology ; HIV Seropositivity/complications ; Hepatitis B Surface Antigens/blood ; Hepatitis B, Chronic/blood ; Hepatitis B, Chronic/complications ; Hepatitis B, Chronic/immunology ; Hepatitis C Antibodies/blood ; Hepatitis C, Chronic/blood ; Hepatitis C, Chronic/complications ; Hepatitis C, Chronic/immunology ; Humans ; Middle Aged ; Young Adult
    Chemical Substances Hepatitis B Surface Antigens ; Hepatitis C Antibodies ; Aspartate Aminotransferases (EC 2.6.1.1) ; Alanine Transaminase (EC 2.6.1.2) ; Alkaline Phosphatase (EC 3.1.3.1)
    Language English
    Publishing date 2012-10-19
    Publishing country India
    Document type Letter
    ZDB-ID 632595-6
    ISSN 0975-0711 ; 0254-8860
    ISSN (online) 0975-0711
    ISSN 0254-8860
    DOI 10.1007/s12664-012-0267-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Ancient skeletal evidence for leprosy in India (2000 B.C.).

    Robbins, Gwen / Tripathy, V Mushrif / Misra, V N / Mohanty, R K / Shinde, V S / Gray, Kelsey M / Schug, Malcolm D

    PloS one

    2009  Volume 4, Issue 5, Page(s) e5669

    Abstract: ... to 600 B.C.: Methodology/principal findings: We report an analysis of pathological conditions ... in skeletal remains from the second millennium B.C. in India. A middle aged adult male skeleton demonstrates ... that lepromatous leprosy was present in India by 2000 B.C. This evidence represents the oldest documented skeletal evidence ...

    Abstract Background: Leprosy is a chronic infectious disease caused by Mycobacterium leprae that affects almost 250,000 people worldwide. The timing of first infection, geographic origin, and pattern of transmission of the disease are still under investigation. Comparative genomics research has suggested M. leprae evolved either in East Africa or South Asia during the Late Pleistocene before spreading to Europe and the rest of the World. The earliest widely accepted evidence for leprosy is in Asian texts dated to 600 B.C.
    Methodology/principal findings: We report an analysis of pathological conditions in skeletal remains from the second millennium B.C. in India. A middle aged adult male skeleton demonstrates pathological changes in the rhinomaxillary region, degenerative joint disease, infectious involvement of the tibia (periostitis), and injury to the peripheral skeleton. The presence and patterning of lesions was subject to a process of differential diagnosis for leprosy including treponemal disease, leishmaniasis, tuberculosis, osteomyelitis, and non-specific infection.
    Conclusions/significance: Results indicate that lepromatous leprosy was present in India by 2000 B.C. This evidence represents the oldest documented skeletal evidence for the disease. Our results indicate that Vedic burial traditions in cases of leprosy were present in northwest India prior to the first millennium B.C. Our results also support translations of early Vedic scriptures as the first textual reference to leprosy. The presence of leprosy in skeletal material dated to the post-urban phase of the Indus Age suggests that if M. leprae evolved in Africa, the disease migrated to India before the Late Holocene, possibly during the third millennium B.C. at a time when there was substantial interaction among the Indus Civilization, Mesopotamia, and Egypt. This evidence should be impetus to look for additional skeletal and molecular evidence of leprosy in India and Africa to confirm the African origin of the disease.
    MeSH term(s) Archaeology ; Bone and Bones/pathology ; History, Ancient ; Humans ; India ; Leprosy/history ; Leprosy/pathology ; Mandible/pathology ; Paleopathology ; Skull/pathology
    Language English
    Publishing date 2009-05-27
    Publishing country United States
    Document type Historical Article ; Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0005669
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Ancient skeletal evidence for leprosy in India (2000 B.C.).

    Gwen Robbins / V Mushrif Tripathy / V N Misra / R K Mohanty / V S Shinde / Kelsey M Gray / Malcolm D Schug

    PLoS ONE, Vol 4, Iss 5, p e

    2009  Volume 5669

    Abstract: ... to 600 B.C. METHODOLOGY/PRINCIPAL FINDINGS:We report an analysis of pathological conditions in skeletal ... remains from the second millennium B.C. in India. A middle aged adult male skeleton demonstrates ... that lepromatous leprosy was present in India by 2000 B.C. This evidence represents the oldest documented skeletal evidence ...

    Abstract BACKGROUND:Leprosy is a chronic infectious disease caused by Mycobacterium leprae that affects almost 250,000 people worldwide. The timing of first infection, geographic origin, and pattern of transmission of the disease are still under investigation. Comparative genomics research has suggested M. leprae evolved either in East Africa or South Asia during the Late Pleistocene before spreading to Europe and the rest of the World. The earliest widely accepted evidence for leprosy is in Asian texts dated to 600 B.C. METHODOLOGY/PRINCIPAL FINDINGS:We report an analysis of pathological conditions in skeletal remains from the second millennium B.C. in India. A middle aged adult male skeleton demonstrates pathological changes in the rhinomaxillary region, degenerative joint disease, infectious involvement of the tibia (periostitis), and injury to the peripheral skeleton. The presence and patterning of lesions was subject to a process of differential diagnosis for leprosy including treponemal disease, leishmaniasis, tuberculosis, osteomyelitis, and non-specific infection. CONCLUSIONS/SIGNIFICANCE:Results indicate that lepromatous leprosy was present in India by 2000 B.C. This evidence represents the oldest documented skeletal evidence for the disease. Our results indicate that Vedic burial traditions in cases of leprosy were present in northwest India prior to the first millennium B.C. Our results also support translations of early Vedic scriptures as the first textual reference to leprosy. The presence of leprosy in skeletal material dated to the post-urban phase of the Indus Age suggests that if M. leprae evolved in Africa, the disease migrated to India before the Late Holocene, possibly during the third millennium B.C. at a time when there was substantial interaction among the Indus Civilization, Mesopotamia, and Egypt. This evidence should be impetus to look for additional skeletal and molecular evidence of leprosy in India and Africa to confirm the African origin of the disease.
    Keywords Medicine ; R ; Science ; Q
    Subject code 930
    Language English
    Publishing date 2009-05-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  8. Article: A high resolution coupled ocean-atmosphere simulation of the regional climate over Central America

    Misra, Vasubandhu / Jayasankar, C. B.

    Climate dynamics. 2022 June, v. 58, no. 11-12

    2022  

    Abstract: This study analyzes a relatively high resolution (15 km grid spacing), regional coupled ocean–atmosphere simulation configured over Central America. The simulation is conducted with the Regional Spectral Model-Regional Ocean Model System (RSM-ROMS) ... ...

    Abstract This study analyzes a relatively high resolution (15 km grid spacing), regional coupled ocean–atmosphere simulation configured over Central America. The simulation is conducted with the Regional Spectral Model-Regional Ocean Model System (RSM-ROMS) forced with global atmospheric and oceanic reanalysis for a period of 25 years (1986–2010). The spatial resolution of the RSM-ROMS simulation is unprecedented for the region. The highlights of the RCM simulation include the verifiable seasonal cycle of mesoscale features like the Low-Level Jets (LLJs), the Mid-Summer Drought (MSD), and the seasonal Tropical Cyclone (TC) activity both in the Pacific and in the Atlantic Oceans. However, some of the biases of the RSM-ROMS simulation of the frequency and amplitude of the MSD, the track density of the TCs in the two ocean basins, and the seasonal bias of the LLJs are noted. The seasonal cycle of the robust surface ocean currents in the eastern Pacific and the Costa Rica Dome is also well captured in the RSM-ROMS simulation. The RSM-ROMS simulation also resolves the seasonal cycle of the cyclonic Panama-Colombia Gyre and the anti-cyclonic Gulf of Papagayo-Tehuantepec Gyre. In many instances we find the RSM-ROMS improves upon the global reanalysis forcing the simulation, indicating the potential value of dynamic downscaling. Furthermore, the co-evolving components of the atmosphere and ocean in the RCM is an added benefit to the atmosphere only and ocean only global reanalysis forcing the simulation. However, the RCM displays significant biases that manifest in precipitation, precipitable water, SST, and winds which in the cases of prognostic variables of RSM-ROMS are perpetrated by the biases in the lateral boundary forcing (e.g., precipitable water) and in other instances forced by biases within the RSM-ROMS (e.g., precipitation, SST).
    Keywords climate ; drought ; dynamics ; hurricanes ; seasonal variation ; summer ; Costa Rica
    Language English
    Dates of publication 2022-06
    Size p. 2981-3001.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 1471747-5
    ISSN 1432-0894 ; 0930-7575
    ISSN (online) 1432-0894
    ISSN 0930-7575
    DOI 10.1007/s00382-021-06083-2
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  9. Article ; Online: Gap-free 16-year (2005-2020) sub-diurnal surface meteorological observations across Florida.

    Peeling, Julie A / Judge, Jasmeet / Misra, Vasubandhu / Jayasankar, C B / Lusher, William R

    Scientific data

    2023  Volume 10, Issue 1, Page(s) 907

    Abstract: The sub-tropical, flat, peninsular region of Florida is subject to a unique climate with extreme weather events that impact agriculture, public health, and management of natural resources. Meteorological data at high temporal resolutions especially in ... ...

    Abstract The sub-tropical, flat, peninsular region of Florida is subject to a unique climate with extreme weather events that impact agriculture, public health, and management of natural resources. Meteorological data at high temporal resolutions especially in tropical latitudes are essential to understand diurnal and semi-diurnal variations of climate, which are considered as the fundamental modes of climate variations of our Earth system. However, many meteorological datasets contain gaps that limit their use for validation of models and further detailed observational analysis. The objective of this paper is to apply a set of data gap filling strategies to develop a gap-free dataset with 15-minute observations for the sub-tropical region of Florida. Using data from the Florida Automated Weather Network (FAWN), methods of linear interpolation, trend continuation, reference to external sources, and nearest station substitution were applied to fill the data gaps depending on the extent of the gap. The outcome of this study provides continuous, publicly accessible surface meteorological observations for 30 FAWN stations at 15-minute intervals for years 2005-2020.
    Language English
    Publishing date 2023-12-16
    Publishing country England
    Document type Dataset ; Journal Article
    ZDB-ID 2775191-0
    ISSN 2052-4463 ; 2052-4463
    ISSN (online) 2052-4463
    ISSN 2052-4463
    DOI 10.1038/s41597-023-02826-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Capsule endoscopy for obscure gastrointestinal bleed in the tropics: A single-center experience on 350 patients.

    Ghoshal, Uday C / Mishra, Piyush / Mathur, Akash / Reddy, Sai Prathap / Fatima, Bushra / Misra, Asha

    Indian journal of gastroenterology : official journal of the Indian Society of Gastroenterology

    2024  

    Abstract: Background: Obscure gastrointestinal bleed (OGIB), now called small bowel bleed (SBB), comprises 5% to 10% of all gastrointestinal (GI) bleed episodes and capsule endoscopy (CE) is a tool for its evaluation. Studies on CE in a large sample of SBB ... ...

    Abstract Background: Obscure gastrointestinal bleed (OGIB), now called small bowel bleed (SBB), comprises 5% to 10% of all gastrointestinal (GI) bleed episodes and capsule endoscopy (CE) is a tool for its evaluation. Studies on CE in a large sample of SBB patients from the tropics are limited.
    Methods: We did a retrospective analysis of a prospectively maintained database of patients with SBB undergoing CE using PillCam or MiroCam CE.
    Results: Of 350 patients (age 52.4 ± 17.4 years; 248 [70.9%] male) undergoing CE, 243 (69.4%) and 107 (30.6%) had overt and occult SBB, respectively. CE detected lesions in 244 (69.7%) patients (single lesion in 172 [49.1%]; multiple in 72 [20.6%]). The single lesions included vascular malformations (52, 14.9%), ulcer/erosion (47, 13.4%), tumor (24, 6.9%), hookworm (19, 5.4%), stricture (15, 4.3%), hemobilia (1, 0.3%) and blood without identifiable lesion (9, 2.6%). Of 72 with multiple lesions, ulcer with stricture was the commonest finding (n = 43, 12.3%). No abnormality was detected in 106 (30.3%) patients. The frequency of lesion detection was comparable among patients with overt and occult SBB (173/243, 71.2% vs. 71/107, 66.3%, respectively; p = 0.4). Younger patients (0 to 39 years) more often had multiple lesions on CE than the older (≥ 40 years) ones (26/76, 34.2% vs. 46/228, 20.2%, respectively; p = 0.001).
    Conclusion: CE has a high diagnostic yield in SBB in the tropics, regardless of the type of bleed or of CE brand and the duration of recording. Multiple lesions associated with SBB are commoner among younger (< 40 years) patients.
    Language English
    Publishing date 2024-03-22
    Publishing country India
    Document type Journal Article
    ZDB-ID 632595-6
    ISSN 0975-0711 ; 0254-8860
    ISSN (online) 0975-0711
    ISSN 0254-8860
    DOI 10.1007/s12664-024-01526-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top