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  1. Article ; Online: Ultrabroadband Near-Infrared Transient Absorption Spectrometer with Simultaneous 900-2350 nm Detection.

    Dorris, Austin L / Umar, Abdul Rashid / Grieco, Christopher

    Applied spectroscopy

    2024  , Page(s) 37028241247072

    Abstract: In this work, we detail an ultrafast pump-probe transient absorption (TA) spectrometer capable of probing the near-infrared (NIR) spectral region from 900 to 2350 nm simultaneously. Two key advances were required to overcome previous spectral window ... ...

    Abstract In this work, we detail an ultrafast pump-probe transient absorption (TA) spectrometer capable of probing the near-infrared (NIR) spectral region from 900 to 2350 nm simultaneously. Two key advances were required to overcome previous spectral window limitations, which typically result from constrained supercontinuum ranges (e.g., 1700 nm) and/or InGaAs detector line rates, especially those with >1700 nm range. First, we generated a broadband NIR supercontinuum using the 1980 nm idler beam of an optical parametric amplifier and implement a unique spectral filtering scheme to balance the detected spectrum. Second, we used a prism-based spectrometer system equipped with high speed InGaAs cameras having ∼2500 nm sensitivity cutoffs. To the best knowledge of the authors, such an extended probe range was previously inaccessible because the combination of two optical geometries either using different supercontinuum crystal materials for generating the NIR and shortwave infrared (SWIR) regions, or using differing pump wavelengths, were required. Finally, we demonstrate the performance and capabilities of the ultrabroadband TA spectroscopy system by presenting data showing ultrafast charge photogeneration in a polymer : fullerene blend thin-film and comparing the results to the literature with a complete agreement.
    Language English
    Publishing date 2024-04-17
    Publishing country United States
    Document type Journal Article
    ISSN 1943-3530
    ISSN (online) 1943-3530
    DOI 10.1177/00037028241247072
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: An older woman with abdominal pain and ascites.

    Grieco, Chris / Hardacre, Conor / Ryan, Neil / Sanderson, Peter

    BMJ (Clinical research ed.)

    2023  Volume 382, Page(s) e075225

    MeSH term(s) Female ; Humans ; Aged ; Ascites/diagnostic imaging ; Ascites/etiology ; Abdominal Pain/etiology
    Language English
    Publishing date 2023-09-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 1362901-3
    ISSN 1756-1833 ; 0959-8154 ; 0959-8146 ; 0959-8138 ; 0959-535X ; 1759-2151
    ISSN (online) 1756-1833
    ISSN 0959-8154 ; 0959-8146 ; 0959-8138 ; 0959-535X ; 1759-2151
    DOI 10.1136/bmj-2023-075225
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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  3. Article ; Online: Ultrafast Radical Photogeneration Pathways in Eumelanin.

    Grieco, Christopher / Kohl, Forrest R / Kohler, Bern

    Photochemistry and photobiology

    2022  Volume 99, Issue 2, Page(s) 680–692

    Abstract: Eumelanin is a ubiquitous biological pigment that rapidly and efficiently deactivates excited states created by UV or visible radiation. Paradoxically, photoirradiation of eumelanin also generates radicals and harmful reactive oxygen species, but the ... ...

    Abstract Eumelanin is a ubiquitous biological pigment that rapidly and efficiently deactivates excited states created by UV or visible radiation. Paradoxically, photoirradiation of eumelanin also generates radicals and harmful reactive oxygen species, but the relationship between these pathways and excited-state deactivation is uncertain. Here, greatly expanding the excitation tuning range (225-620 nm) and probing window (400-1500 nm) in femtosecond transient absorption spectroscopy of the synthetic eumelanin, DOPA melanin, enables the detection of photogenerated radials with ultrafast time resolution for the first time. Despite its heterogeneous nature, the transient absorption signals can be modeled by two spectral components assigned to solvated electrons and photogenerated radicals. Radical absorbance measured several nanoseconds after excitation increases exponentially with increasing photon energy, matching the trend in radical yields measured in electron paramagnetic resonance spectroscopy experiments. Spectral modeling of the transient signals reveals two radical generation mechanisms: (1) photoionization by UV light; and (2) photoinduced charge transfer among eumelanin chromophores by UVA and visible wavelengths capable of reaching the pigment in skin. Concurrent ultrafast relaxation and radical generation underlie the ability of eumelanin to be both photoprotective and photodamaging, and the branching between these pathways likely depends on the wavelength of the absorbed light.
    MeSH term(s) Melanins/metabolism ; Light ; Electron Spin Resonance Spectroscopy ; Ultraviolet Rays
    Chemical Substances eumelanin (12627-86-0) ; Melanins
    Language English
    Publishing date 2022-10-29
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 123540-0
    ISSN 1751-1097 ; 0031-8655
    ISSN (online) 1751-1097
    ISSN 0031-8655
    DOI 10.1111/php.13731
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.B 1686: Show issues Location:
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  4. Article ; Online: Surgical management of a COVID-19-associated necrotic pneumonia.

    Nizami, Maria / Grieco, Charlotte / Hogan, John / Aresu, Giuseppe

    BMJ case reports

    2021  Volume 14, Issue 6

    Abstract: At the outset of the pandemic, SARS-CoV-2 was thought to present simply as persistent cough and fever. However, with time, the medical community noted a myriad of associated symptoms well-described in the literature. Medical complications were ... ...

    Abstract At the outset of the pandemic, SARS-CoV-2 was thought to present simply as persistent cough and fever. However, with time, the medical community noted a myriad of associated symptoms well-described in the literature. Medical complications were particularly common in elderly populations and many early publications described pneumonia, organ failure, acute respiratory distress syndrome, hypercoagulability/microthrombosis and superimposed bacterial/viral infections. There is, however, a lack of literature describing surgical complications of COVID-19 and as such little knowledge regarding safe surgical interventions. This case describes the presentation/management of a patient who developed COVID-19-associated necrotising pneumonia. Video-assisted thoracoscopy lobectomy was performed following CT demonstration of necrotising pneumonia. Pathological evaluation of the surgical resection specimen demonstrated the microarchitecture of a severely diseased COVID-19 lung-fibrosis. This case demonstrates the safe management of a necrotic lung using a minimal access approach in the context of COVID-19 infection.
    MeSH term(s) Aged ; COVID-19 ; Humans ; Necrosis ; Pandemics ; Pneumonia ; SARS-CoV-2
    Language English
    Publishing date 2021-06-02
    Publishing country England
    Document type Case Reports ; Journal Article
    ISSN 1757-790X
    ISSN (online) 1757-790X
    DOI 10.1136/bcr-2020-240766
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Vibrational relaxation by methylated xanthines in solution: Insights from 2D IR spectroscopy and calculations.

    Hanes, Alex T / Grieco, Christopher / Lalisse, Remy F / Hadad, Christopher M / Kohler, Bern

    The Journal of chemical physics

    2023  Volume 158, Issue 4, Page(s) 44302

    Abstract: Two-dimensional infrared (2D IR) spectroscopy, infrared pump-infrared probe spectroscopy, and density functional theory calculations were used to study vibrational relaxation by ring and carbonyl stretching modes in a series of methylated xanthine ... ...

    Abstract Two-dimensional infrared (2D IR) spectroscopy, infrared pump-infrared probe spectroscopy, and density functional theory calculations were used to study vibrational relaxation by ring and carbonyl stretching modes in a series of methylated xanthine derivatives in acetonitrile and deuterium oxide (heavy water). Isotropic signals from the excited symmetric and asymmetric carbonyl stretch modes decay biexponentially in both solvents. Coherent energy transfer between the symmetric and asymmetric carbonyl stretching modes gives rise to a quantum beat in the time-dependent anisotropy signals. The damping time of the coherent oscillation agrees with the fast decay component of the carbonyl bleach recovery signals, indicating that this time constant reflects intramolecular vibrational redistribution (IVR) to other solute modes. Despite their similar frequencies, the excited ring modes decay monoexponentially with a time constant that matches the slow decay component of the carbonyl modes. The slow decay times, which are faster in heavy water than in acetonitrile, approximately match the ones observed in previous UV pump-IR probe measurements on the same compounds. The slow component is assigned to intermolecular energy transfer to solvent bath modes from low-frequency solute modes, which are populated by IVR and are anharmonically coupled to the carbonyl and ring stretch modes. 2D IR measurements indicate that the carbonyl stretching modes are weakly coupled to the delocalized ring modes, resulting in slow exchange that cannot explain the common solvent-dependence. IVR is suggested to occur at different rates for the carbonyl vs ring modes due to differences in mode-specific couplings and not to differences in the density of accessible states.
    Language English
    Publishing date 2023-01-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3113-6
    ISSN 1089-7690 ; 0021-9606
    ISSN (online) 1089-7690
    ISSN 0021-9606
    DOI 10.1063/5.0135412
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 4' 49/16: Show issues

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  6. Article: Which sharing are we betting on? Analysing the financial attractiveness of sharing business models

    Grieco, Cecilia / Michelini, Laura / Iasevoli, Gennaro

    Journal of cleaner production. 2021 Sept. 10, v. 314

    2021  

    Abstract: The study aims to explore the interaction between business model dimensions and the financial attractiveness of sharing economy platforms, to understand if business models with certain dimensions are more able to attract investment. The research has been ...

    Abstract The study aims to explore the interaction between business model dimensions and the financial attractiveness of sharing economy platforms, to understand if business models with certain dimensions are more able to attract investment. The research has been developed taking into account the difference between true sharing and pseudo-sharing, to establish to which type of sharing economy platform more investment has been directed to date. The main dimensions of sharing economy business models were identified from the literature. These variables were used to classify the business models of 161 sharing platforms. A one-way ANOVA was performed to infer results.Results from the analysis show that business models that offer rational benefits; increase the utilization of durable assets; have a C2C process and adopt a transaction model, have received more funds. In conclusion, the research suggests that different sharing business models can affect the financial attractiveness and the empirical results show that “pure exchange” platforms are more financed compared with the “pure sharing” platforms.
    Keywords assets ; cleaning ; econometric models ; exhibitions ; funding ; journals ; stocks and shares
    Language English
    Dates of publication 2021-0910
    Publishing place Elsevier Ltd
    Document type Article
    ISSN 0959-6526
    DOI 10.1016/j.jclepro.2021.128067
    Database NAL-Catalogue (AGRICOLA)

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  7. Book: Assessing social impact of social enterprises

    Grieco, Cecilia

    does one size really fit all?

    (Springer briefs in business)

    2015  

    Author's details Cecilia Grieco
    Series title Springer briefs in business
    Keywords Sozialwirtschaft ; Wirkungsanalyse ; Nachhaltigkeitsbericht ; Return on Investment ; Balanced Scorecard
    Language English
    Size X, 111 S., graph. Darst.
    Publisher Springer
    Publishing place Cham u.a.
    Document type Book
    Note Literaturangaben
    ISBN 9783319153131 ; 9783319153148 ; 3319153137 ; 3319153145
    Database Former special subject collection: coastal and deep sea fishing

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  8. Book: Assessing social impact of social enterprises

    Grieco, Cecilia

    does one size really fit all?

    (Springer briefs in business)

    2015  

    Author's details Cecilia Grieco
    Series title Springer briefs in business
    Keywords Sozialwirtschaft ; Wirkungsanalyse ; Nachhaltigkeitsbericht ; Return on Investment ; Balanced Scorecard
    Language English
    Size X, 111 S., graph. Darst.
    Publisher Springer
    Publishing place Cham u.a.
    Document type Book
    Note Literaturangaben
    ISBN 9783319153131 ; 9783319153148 ; 3319153137 ; 3319153145
    Database ECONomics Information System

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  9. Article ; Online: Integrated Holistic Student Affairs: A Personalized, Equitable, Student-Centered Approach to Student Affairs.

    Grieco, C Alexander / Currence, Princess / Teraguchi, Daniel H / Monroe, Alicia / Palermo, Ann-Gel S

    Academic medicine : journal of the Association of American Medical Colleges

    2022  Volume 97, Issue 10, Page(s) 1441–1446

    Abstract: Medical education has reached a critical juncture-the structural racism that has permeated the fabric of its systems and institutions for centuries can no longer be ignored. The destructive, disproportionate impact of the COVID-19 pandemic and unabated ... ...

    Abstract Medical education has reached a critical juncture-the structural racism that has permeated the fabric of its systems and institutions for centuries can no longer be ignored. The destructive, disproportionate impact of the COVID-19 pandemic and unabated violence targeting individuals who are Black, Indigenous, and People of Color (BIPOC) exact an incalculable toll on BIPOC students and students from other groups that are historically underrepresented in medicine (UIM). Failing to recognize and act on the well-documented differential experience of BIPOC medical students impedes medical educators' ability to cultivate learning environments where all learners have an equitable opportunity to thrive. Holistic review admission processes, now widely accepted, have challenged admissions committees to consider the "whole applicant" to diversify matriculating classes. While gaining admission is critical, it is merely the first step for BIPOC students, who may face marginalization within what the authors have termed a "sink-or-swim" culture in medical education. For the tremendous potential afforded by holistic review to be realized, the medical education community must extend the holistic approach throughout the medical education continuum, beginning with student affairs practices and support. The authors propose the use of Integrated Holistic Student Affairs (IHSA), a systems-based model that fosters the reexamining and reengineering of existing student affairs structures, policies, and processes to promote a personalized, equitable student-centered approach. The IHSA Model consists of 4 strategic actions-establish vertical and horizontal collaboration, conduct systems thinking analysis, target leverage points for change, and operationalize the change process-and 4 areas of priority for collaboration with student diversity affairs staff and faculty. The IHSA Model provides student affairs staff and faculty with a framework for shifting from reactive, deficit-oriented practices to proactive, empowering, equitable practices, with the goal of allowing BIPOC and all other UIM students to thrive during their journey from matriculation to graduation.
    MeSH term(s) COVID-19/epidemiology ; Education, Medical ; Faculty ; Humans ; Pandemics ; Students, Medical
    Language English
    Publishing date 2022-09-23
    Publishing country United States
    Document type Journal Article
    ZDB-ID 96192-9
    ISSN 1938-808X ; 1040-2446
    ISSN (online) 1938-808X
    ISSN 1040-2446
    DOI 10.1097/ACM.0000000000004757
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 112: Show issues Location:
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    Jg. 1995 - 2021: Lesesall (1.OG)
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  10. Article ; Online: Salvage Therapy With Selpercatinib for

    d'Arienzo, Paolo D / Cunningham, Niamh / O'Sullivan, Hazel / Grieco, Charlotte / Patel, Virjen / Popat, Sanjay

    JTO clinical and research reports

    2023  Volume 4, Issue 12, Page(s) 100581

    Abstract: Selpercatinib and pralsetinib are RET inhibitors with substantial activity in ... ...

    Abstract Selpercatinib and pralsetinib are RET inhibitors with substantial activity in advanced
    Language English
    Publishing date 2023-09-29
    Publishing country United States
    Document type Case Reports
    ISSN 2666-3643
    ISSN (online) 2666-3643
    DOI 10.1016/j.jtocrr.2023.100581
    Database MEDical Literature Analysis and Retrieval System OnLINE

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