3,029 research outputs found
Author Co-Citation Analysis (ACA): a powerful tool for representing implicit knowledge of scholar knowledge workers
No full textIn the last decade, knowledge has emerged as one of the most important and valuable organizational assets. Gradually this importance caused to emergence of new discipline entitled ―knowledge management‖. However one of the major challenges of knowledge management is conversion implicit or tacit knowledge to explicit knowledge. Thus Making knowledge visible so that it can be better accessed, discussed, valued or generally managed is a long-standing objective in knowledge management. Accordingly in this paper author co- citation analysis (ACA) will be proposed as an efficient technique of knowledge visualization in academia (Scholar knowledge workers)
Analysis of MicroRNA Expression in Embryonic Developmental Toxicity Induced by MC-RR
No full textAs cynobacterial blooms frequently occur in fresh waters throughout the world, microcystins (MCs) have caused serious damage to both wildlife and human health. MCs are known to have developmental toxicity, however, the possible molecular mechanism is largely unknown. This is the first toxicological study to integrate post-transcriptomic, proteomic and bioinformatics analysis to explore molecular mechanisms for developmental toxicity of MCs in zebrafish. After being microinjected directly into embryos, MC-RR dose-dependently decreased survival rates and increased malformation rates of embryos, causing various embryo abnormalities including loss of vascular integrity and hemorrhage. Expressions of 31 microRNAs (miRNAs) and 78 proteins were significantly affected at 72 hours post-fertilisation (hpf). Expressions of miR-430 and miR-125 families were also significantly changed. The altered expressions of miR-31 and miR-126 were likely responsible for the loss of vascular integrity. MC-RR significantly reduced the expressions of a number of proteins involved in energy metabolism, cell division, protein synthesis, cytoskeleton maintenance, response to stress and DNA replication. Bioinformatics analysis shows that several aberrantly expressed miRNAs and proteins (involved in various molecular pathways) were predicted to be potential MC-responsive miRNA-target pairs, and that their aberrant expressions should be the possible molecular mechanisms for the various developmental defects caused by MC-RR
The proteomic study on cellular responses of the testes of zebrafish (Danio rerio) exposed to microcystin-RR
No full textMicrocystin-RR (MC-RR) is a commonly encountered cyanotoxin and receives increasing attention due to the risk of its bioaccumulation in aquatic animals like fish. This study investigated the protein profiles of zebrafish (Danio rerio) testes after intraperitoneal injection (i.p.) with 0.5 LD50 (2000 mu g/kg). MC-RR caused a noticeable damage to testicular ultrastructure, showing widened intercellular junction, distention of mitochondria. The testes showed a rapid response of its defense systems to the oxidative stress caused by MC-RR. This is the first to use a proteomic approach to obtain an overview of the effects of MC-RR on the testes of zebrafish. The proteomic results revealed that toxin exposure remarkably altered the abundance of 24 proteins that were involved in cytoskeleton assembly, oxidative stress, glycolysis metabolism, calcium ion binding and other biological functions. In conclusion, MC-RR damaged the testes and was toxic to the reproductive system of male zebrafish mainly through causing oxidative stress.Microcystin-RR (MC-RR) is a commonly encountered cyanotoxin and receives increasing attention due to the risk of its bioaccumulation in aquatic animals like fish. This study investigated the protein profiles of zebrafish (Danio rerio) testes after intraperitoneal injection (i.p.) with 0.5 LD50 (2000 mu g/kg). MC-RR caused a noticeable damage to testicular ultrastructure, showing widened intercellular junction, distention of mitochondria. The testes showed a rapid response of its defense systems to the oxidative stress caused by MC-RR. This is the first to use a proteomic approach to obtain an overview of the effects of MC-RR on the testes of zebrafish. The proteomic results revealed that toxin exposure remarkably altered the abundance of 24 proteins that were involved in cytoskeleton assembly, oxidative stress, glycolysis metabolism, calcium ion binding and other biological functions. In conclusion, MC-RR damaged the testes and was toxic to the reproductive system of male zebrafish mainly through causing oxidative stress
So Tom has turned a poet, what a dear [first line]
No full textstrophicnasame as Box 192 Item 50Cover is duplicated in 192.050.
Music is duplicated in 192.050.Johns Hopkins University, Levy Sheet Music Collection, Box
192, Item 051Thomas M-rr-s, Author of "How They Act in Baltimore." "Mephistophiles K.G.S.
So Tom has turned a poet, what a dear [first line]
No full textstrophicnasame as Box 192 Item 50Cover is duplicated in 192.050.
Music is duplicated in 192.050.Johns Hopkins University, Levy Sheet Music Collection, Box
192, Item 051Thomas M-rr-s, Author of "How They Act in Baltimore." "Mephistophiles K.G.S.
So Tom has turned a poet, what a dear [first line]
No full textstrophicnaCover is duplicated in 192.051.
Music is duplicated in 192.051.Johns Hopkins University, Levy Sheet Music Collection, Box
192, Item 050Thomas M-rr-s, Author of "How They Act in Baltimore." "Mephistophiles K.G.S.
So Tom has turned a poet, what a dear [first line]
No full textstrophicnaCover is duplicated in 192.051.
Music is duplicated in 192.051.Johns Hopkins University, Levy Sheet Music Collection, Box
192, Item 050Thomas M-rr-s, Author of "How They Act in Baltimore." "Mephistophiles K.G.S.
FPGA-accelerated calculation of the correlation integral of RR intervals
No full textAnaliza sygnałów biomedycznych jest jednym z ważniejszych obszarów badań naukowych. Istnieje duże zapotrzebowanie na wydajne systemy obliczeniowe, które pozwalały by na analizę sygnałów biomedycznych wielu pacjentów. W artykule przedstawiono propozycję architektury systemu obliczającego całkę korelacji interwałów międzyuderzeniowych RR, wykorzystującego układ FPGA do akceleracji obliczeń.Biomedical signal analysis is a very important field of research. This paper describes architecture of FPGA-accelerated computational system proposed by Author. The main purpose of this system is calculation of the correlation integral of RR intervals in cardiological patients
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Modes, masses, metallicities, and magnitudes of RR Lyrae variables
No full textThe author reviews past and recent developments in the study of RR Lyrae variables. He provides supporting evidence for a large helium content but remains uncertain as to their masses and luminosities. Time dependent convection is offered as a probable explanation for the double mode pulsations of these stars. 25 refs., 8 figs., 3 tabs
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Abstract PO5-10-03: A Translational Epidemiologic Approach to Understand Disparities in Triple Negative Breast Cancer: Integrating Germline Genomics, Genetic Ancestry, and Neighborhood Disadvantage
No full textAbstract Background: Triple-negative breast cancer (TNBC) disproportionately affects women of West African ancestry and those living in neighborhood disadvantage (ND). However, these studies were limited in their ability to control for both ancestry and socioeconomic data. To overcome this limitation, we utilized the epidemiologic-genomic infrastructure of the Miami Breast Cancer Disparities (MBCD) study to evaluate the impact of ND on relative risk (RR) of TNBC, independent of West African ancestry. Methods: A prospective cohort of 502 women with breast cancer enrolled in the MBCD study from 2020-2022. Genetic ancestry, median neighborhood-level income quartiles (ND), germline genetic mutations, and tumor characteristics were assessed. Multinomial logistic regression was used to determine the RR between West African ancestry and TNBC (compared to ER+/HER2- and HER2+ disease) after controlling for access to care measures which might impact TNBC distributions and known TNBC risk factors (e.g., age, ND, BRCA 1 mutation, obesity, screening mammography). Results: Of the 502 women, 333 (66.33%) had ER+/HER2- disease, 67 (13.35%) had ER+/HER2+ disease, 22 (4.38%) had ER-/HER2+ disease, and 80 (15.94%) had TNBC. On univariable analysis, the highest West African quartile (RR 3.58 95%CI 1.72-7.42, p< 0.001), a BRCA 1 mutation (RR 7.89 95%CI 2.25-27.64, p=0.001) were associated with a higher RR of TNBC. Conversely, decreasing ND was associated with a lower RR of TNBC (RR 0.42 95%CI 0.21-0.83, p=0.013). On covariate adjusted multivariable analysis, decreasing ND (RR 0.45 95%CI 0.22-0.99, p=0.047) and a BRCA 1 mutation (RR 12.68 95%CI 3.19-50.35, p< 0.0001) were both significantly associated with TNBC compared to ER+/HER2- and HER2+ disease. Conclusions: To our knowledge, this prospective study is the first to evaluate the combined impact of genetic ancestry, germline genomics, and social factors on RR of TNBC. We discovered that ND and BRCA 1 mutations are independent predictors of TNBC, even after accounting for known TNBC risk factors (e.g., West African ancestry). These findings suggest a potential association between ND and TNBC, thus emphasizing the importance of a translational epidemiologic approach to understand TNBC disparities that considers both genomic and non-genomic factors. Table. Adjusted Multinomial Logistic Regression of Patient Genetic Ancestry, Sociodemographic and Tumor Characteristics Predictors of Breast Cancer Subtype Citation Format: Neha Goel, Alexandra Hernandez, Susan Kesmodel, Erin Kobetz, Nipun Merchant, Timothy Rebbeck. A Translational Epidemiologic Approach to Understand Disparities in Triple Negative Breast Cancer: Integrating Germline Genomics, Genetic Ancestry, and Neighborhood Disadvantage [abstract]. In: Proceedings of the 2023 San Antonio Breast Cancer Symposium; 2023 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2024;84(9 Suppl):Abstract nr PO5-10-03
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