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  1. Article ; Online: Unraveling Ce

    Cardenas, Luis / Molinet-Chinaglia, Clément / Loridant, Stéphane

    Physical chemistry chemical physics : PCCP

    2022  Volume 24, Issue 37, Page(s) 22815–22822

    Abstract: A sequential analysis using Ultra-violet Photoelectron Spectroscopy (UPS) and X-ray Photoelectron Spectroscopy (XPS) on ceria nanopowders has been implemented to identify the influence of the X-ray beam on the surface of this oxide. For the first time, ... ...

    Abstract A sequential analysis using Ultra-violet Photoelectron Spectroscopy (UPS) and X-ray Photoelectron Spectroscopy (XPS) on ceria nanopowders has been implemented to identify the influence of the X-ray beam on the surface of this oxide. For the first time, UPS analysis evidenced the photoreductive effect of XPS analysis on ceria after an oxidative
    Language English
    Publishing date 2022-09-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 1476244-4
    ISSN 1463-9084 ; 1463-9076
    ISSN (online) 1463-9084
    ISSN 1463-9076
    DOI 10.1039/d2cp02736d
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Necrotizing soft tissue infection of the forearms in a patient using intravenous heroin: case report of advanced wound management improving dressing tolerance and expediting skin graft.

    Gallagher, Kathy / Desai, Harsh K / Alberto, Emily C / Cardenas, Luis

    Wound management & prevention

    2022  Volume 68, Issue 1, Page(s) 16–21

    Abstract: Background: Necrotizing soft tissue infection (NSTI) is rare and characterized by rapid onset and spread of inflammation and necrosis. The infection starts within the fascia but can rapidly progress to include musculature, subcutaneous fat, and ... ...

    Abstract Background: Necrotizing soft tissue infection (NSTI) is rare and characterized by rapid onset and spread of inflammation and necrosis. The infection starts within the fascia but can rapidly progress to include musculature, subcutaneous fat, and overlying skin. Its presentation is considered a surgical emergency. Persons who use intravenous or subcutaneous opioids are at higher risk of NSTIs.
    Purpose: The purpose of this case report is to describe the positive clinical outcome after consulting with wound specialists and using a dressing regimen to expedite more rapid wound healing, shortened time to skin graft, and improved pain tolerance in a patient with a history of intravenous and subcutaneous heroin use.
    Case report: The patient presented with an NSTI that required extensive debridement of the bilateral upper extremities. The acute surgical wound service was consulted. A dressing regimen consisting of hypochlorous acid-preserved wound cleansing, followed by carboxymethylcellulose fiber with 1.2% ionic silver covered by hydrocellular foam to promote a moist healing environment, was used to facilitate granulation.
    Results: Healthy granulation tissue was noted 6 days after debridement. The improved rate of granulation and the patient's tolerance to dressing changes secondary to decreased pain from these dressings significantly expedited the time to graft and wound healing. The patient underwent split-thickness skin grafting 10 days after debridement. There was 100% uptake of the grafts on postgraft day 8.
    Conclusion: The favorable clinical outcome suggests that early consultation with wound specialists and implementation of the dressing regimen were effective in this patient regarding improved pain control and healing. However, because the patient left against medical advice on hospital day 20, the clinical course could not be followed beyond the first few postoperative weeks.
    MeSH term(s) Bandages ; Forearm ; Heroin ; Humans ; Pain ; Skin Transplantation ; Soft Tissue Infections
    Chemical Substances Heroin (70D95007SX)
    Language English
    Publishing date 2022-04-07
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 2964376-4
    ISSN 2640-5245 ; 2640-5237
    ISSN (online) 2640-5245
    ISSN 2640-5237
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    In stock of ZB MED Cologne/Königswinter

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  3. Article ; Online: How far the chemistry of self-assembled monolayers on gold surfaces affects their work function?

    Bossard-Giannesini, Léo / Cardenas, Luis / Cruguel, Hervé / Demessence, Aude / Loffreda, David / Pluchery, Olivier

    Nanoscale

    2023  Volume 15, Issue 42, Page(s) 17113–17123

    Abstract: Self-assembled monolayers composed of various long-chain aliphatic molecules and different tail functional groups have been synthesized on the Au(111) surface and characterized by Kelvin probe force microscopy and ultraviolet photoelectron spectroscopy. ... ...

    Abstract Self-assembled monolayers composed of various long-chain aliphatic molecules and different tail functional groups have been synthesized on the Au(111) surface and characterized by Kelvin probe force microscopy and ultraviolet photoelectron spectroscopy. Carboxy, amino, thio and methyl terminal groups have been considered in the design of self-assembled monolayers with different aliphatic chain lengths (from C6 to C16). Work function measurements by Kelvin probe force microscopy have been carried out under a controlled and room atmosphere. Remarkably, a reduction of the relative humidity from 40% to 3% has induced a work function shift of up to 0.3 eV. As expected, the changes of the chain length of the aliphatic moiety and of the tail group have a significant impact on the tuning of the measured work function (3.90 eV for dodecanethiol
    Language English
    Publishing date 2023-11-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515664-0
    ISSN 2040-3372 ; 2040-3364
    ISSN (online) 2040-3372
    ISSN 2040-3364
    DOI 10.1039/d3nr03172a
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  4. Article ; Online: Anaerobiosis, a neglected factor in phage-bacteria interactions.

    Hernández Villamizar, Santiago / Chica Cárdenas, Luis A / Morales Mancera, Laura T / Vives Florez, Martha J

    Applied and environmental microbiology

    2023  Volume 89, Issue 12, Page(s) e0149123

    Abstract: Importance: Many parameters affect phage-bacteria interaction. Some of these parameters depend on the environment in which the bacteria are present. Anaerobiosis effect on phage infection in facultative anaerobic bacteria has not yet been studied. The ... ...

    Abstract Importance: Many parameters affect phage-bacteria interaction. Some of these parameters depend on the environment in which the bacteria are present. Anaerobiosis effect on phage infection in facultative anaerobic bacteria has not yet been studied. The absence of oxygen triggers metabolic changes in facultative bacteria and this affects phage infection and viral life cycle. Understanding how an anaerobic environment can alter the behavior of phages during infection is relevant for the phage therapy success.
    MeSH term(s) Bacteriophages ; Anaerobiosis ; Bacteria
    Language English
    Publishing date 2023-11-15
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 223011-2
    ISSN 1098-5336 ; 0099-2240
    ISSN (online) 1098-5336
    ISSN 0099-2240
    DOI 10.1128/aem.01491-23
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    In stock of ZB MED Cologne/Königswinter

    Zs.B 201: Show issues Location:
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  5. Book ; Online: Machine learning algorithms for three-dimensional mean-curvature computation in the level-set method

    Larios-Cárdenas, Luis Ángel / Gibou, Frédéric

    2022  

    Abstract: We propose a data-driven mean-curvature solver for the level-set method. This work is the natural extension to $\mathbb{R}^3$ of our two-dimensional strategy in [DOI:10.1007/s10915-022-01952-2][1] and the hybrid inference system of [DOI:10.1016/j.jcp ... ...

    Abstract We propose a data-driven mean-curvature solver for the level-set method. This work is the natural extension to $\mathbb{R}^3$ of our two-dimensional strategy in [DOI:10.1007/s10915-022-01952-2][1] and the hybrid inference system of [DOI:10.1016/j.jcp.2022.111291][2]. However, in contrast to [1,2], which built resolution-dependent neural-network dictionaries, here we develop a pair of models in $\mathbb{R}^3$, regardless of the mesh size. Our feedforward networks ingest transformed level-set, gradient, and curvature data to fix numerical mean-curvature approximations selectively for interface nodes. To reduce the problem's complexity, we have used the Gaussian curvature to classify stencils and fit our models separately to non-saddle and saddle patterns. Non-saddle stencils are easier to handle because they exhibit a curvature error distribution characterized by monotonicity and symmetry. While the latter has allowed us to train only on half the mean-curvature spectrum, the former has helped us blend the data-driven and the baseline estimations seamlessly near flat regions. On the other hand, the saddle-pattern error structure is less clear; thus, we have exploited no latent information beyond what is known. In this regard, we have trained our models on not only spherical but also sinusoidal and hyperbolic paraboloidal patches. Our approach to building their data sets is systematic but gleans samples randomly while ensuring well-balancedness. We have also resorted to standardization and dimensionality reduction and integrated regularization to minimize outliers. In addition, we leverage curvature rotation/reflection invariance to improve precision at inference time. Several experiments confirm that our proposed system can yield more accurate mean-curvature estimations than modern particle-based interface reconstruction and level-set schemes around under-resolved regions.
    Keywords Computer Science - Machine Learning ; Mathematics - Numerical Analysis ; 65D15 ; 65D18 ; 65N06 ; 65N50 ; 65Z05 ; 68T20 ; I.2.6 ; G.1.8
    Subject code 006
    Publishing date 2022-08-18
    Publishing country us
    Document type Book ; Online
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  6. Book ; Online: Error-Correcting Neural Networks for Two-Dimensional Curvature Computation in the Level-Set Method

    Larios-Cárdenas, Luis Ángel / Gibou, Frédéric

    2022  

    Abstract: We present an error-neural-modeling-based strategy for approximating two-dimensional curvature in the level-set method. Our main contribution is a redesigned hybrid solver [Larios-C\'ardenas and Gibou, J. Comput. Phys. (May 2022), 10.1016/j.jcp.2022 ... ...

    Abstract We present an error-neural-modeling-based strategy for approximating two-dimensional curvature in the level-set method. Our main contribution is a redesigned hybrid solver [Larios-C\'ardenas and Gibou, J. Comput. Phys. (May 2022), 10.1016/j.jcp.2022.111291] that relies on numerical schemes to enable machine-learning operations on demand. In particular, our routine features double predicting to harness curvature symmetry invariance in favor of precision and stability. The core of this solver is a multilayer perceptron trained on circular- and sinusoidal-interface samples. Its role is to quantify the error in numerical curvature approximations and emit corrected estimates for select grid vertices along the free boundary. These corrections arise in response to preprocessed context level-set, curvature, and gradient data. To promote neural capacity, we have adopted sample negative-curvature normalization, reorientation, and reflection-based augmentation. In the same manner, our system incorporates dimensionality reduction, well-balancedness, and regularization to minimize outlying effects. Our training approach is likewise scalable across mesh sizes. For this purpose, we have introduced dimensionless parametrization and probabilistic subsampling during data production. Together, all these elements have improved the accuracy and efficiency of curvature calculations around under-resolved regions. In most experiments, our strategy has outperformed the numerical baseline at twice the number of redistancing steps while requiring only a fraction of the cost.
    Keywords Mathematics - Numerical Analysis ; Computer Science - Machine Learning ; 68T99 ; 65Z05 ; 65N06 ; I.2.6 ; G.1.8
    Subject code 518
    Publishing date 2022-01-22
    Publishing country us
    Document type Book ; Online
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  7. Article ; Online: Oroya fever and autoinmune hemolytic anemia, coexistence or complication?

    Patrón-Ordóñez, Gino / Cano-Cárdenas, Luis Alberto

    Medicina clinica

    2020  Volume 156, Issue 3, Page(s) 147

    Title translation Fiebre de la Oroya y anemia hemolítica autoinmune: ¿Coexistencia o complicación?
    MeSH term(s) Anemia, Hemolytic/diagnosis ; Anemia, Hemolytic/etiology ; Bartonella Infections ; Humans
    Language Spanish
    Publishing date 2020-02-24
    Publishing country Spain
    Document type Letter
    ZDB-ID 411607-0
    ISSN 1578-8989 ; 0025-7753
    ISSN (online) 1578-8989
    ISSN 0025-7753
    DOI 10.1016/j.medcli.2019.10.016
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  8. Article: Bacterial meta-analysis of chicken cecal microbiota.

    Chica Cardenas, Luis Alberto / Clavijo, Viviana / Vives, Martha / Reyes, Alejandro

    PeerJ

    2021  Volume 9, Page(s) e10571

    Abstract: Poultry production is an industry that generates 90,000 metric tons of chicken meat worldwide. Thus, optimizing chicken growth and sustainable production is of great importance. A central factor determining not only production parameters, but also ... ...

    Abstract Poultry production is an industry that generates 90,000 metric tons of chicken meat worldwide. Thus, optimizing chicken growth and sustainable production is of great importance. A central factor determining not only production parameters, but also stability of the immune system and chicken health, is the diversity and variability of the microbiota present throughout the gastrointestinal tract. To date, several studies have investigated the relationship between bacterial communities and the gut microbiome, with limited data to compare. This study aims to create a bacterial meta-analysis based on studies using amplicon sequencing with Illumina sequencing technologies in order to build a baseline for comparison in future analyses of the cecal bacterial composition in chicken. A systematic literature review was performed (SYRF ID: e84f0468-e418-4eec-9da4-b517f1b4809d. Full project URL: https://app.syrf.org.uk/projects/e84f0468-e418-4eec-9da4-b517f1b4809d/detail). From all the available and analyzed manuscripts only nine contained full raw-sequence data available and the corresponding metadata. A total of 324 samples, comprising three different regions within the
    Language English
    Publishing date 2021-01-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2703241-3
    ISSN 2167-8359
    ISSN 2167-8359
    DOI 10.7717/peerj.10571
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  9. Article: Editorial: Early signaling in the rhizobium-legume symbiosis.

    Soto, María J / Staehelin, Christian / Gourion, Benjamin / Cárdenas, Luis / Vinardell, José M

    Frontiers in plant science

    2022  Volume 13, Page(s) 1056830

    Language English
    Publishing date 2022-10-19
    Publishing country Switzerland
    Document type Editorial
    ZDB-ID 2613694-6
    ISSN 1664-462X
    ISSN 1664-462X
    DOI 10.3389/fpls.2022.1056830
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  10. Article: A Retrospective Health Economic Analysis of a Stable Hypochlorous Acid Preserved Wound Cleanser Versus 0.9% Saline Solution as Instillation for Negative-Pressure Wound Therapy in Severe and Infected Wounds.

    Gallagher, Kathy E / Alberto, Emily C / Mallow, Peter J / Hermans, Michel H / Cardenas, Luis

    Cureus

    2022  Volume 14, Issue 4, Page(s) e24321

    Abstract: Introduction Negative-pressure wound therapy (NPWT) with instillation and dwell time is an accepted adjunct therapy for infected wounds. A study was conducted to assess whether the use of hypochlorous acid preserved wound cleanser (HAPWOC) (Vashe, Urgo ... ...

    Abstract Introduction Negative-pressure wound therapy (NPWT) with instillation and dwell time is an accepted adjunct therapy for infected wounds. A study was conducted to assess whether the use of hypochlorous acid preserved wound cleanser (HAPWOC) (Vashe, Urgo Medical North America, Fort Worth, TX, USA) as the irrigant would reduce the cost of care in comparison to 0.9% saline (NaCl). Method A comparative, observational, retrospective analysis assessed 27 serious and infected wounds in 24 patients. The lesions were of different and complex etiologies, including necrotizing fasciitis and stage IV diabetic foot ulcers. NPWT was used as part of the overall multimodal treatment regimen. The only variance in the treatment protocol was the use of saline (N=8) or HAPWOC (N=19) as the irrigant. Results When compared to NaCl, wounds treated with HAPWOC trended toward fewer operating room (OR) visits versus NaCl (3.3 versus 4.1) and a shorter length of hospital stay (LOS) (24.3 days versus 37.9 days). The Orlando Health Transparency guide shows the cost of OR debridement as $2,525. Thus, debridement for HAPWOC-treated wounds ($8,332) costs $2,020 (24%) less than for NaCl-treated wounds ($10,352). Using the 2016 Kaiser Health data (average daily hospital cost, excludingall interventions: $2,052), the cost of HAPWOC and NaCl instill translates to $49,864 and $77,771, respectively, a difference of $27,906 (56%) more for NaCl treatment. The Agency for Healthcare Research and Quality (AHRQ) 2012 data indicate an average daily cost of hospital stay, including all interventions, of $10,400. Thus, HAPWOC treatment cost translates to $252,720 versus NaCl-related costs of $394,160; in these calculations, using NaCl costs $141.440 (+56%) more per patient than HAPWOC. Conclusion The use of NPWT with HAPWOC versus NaCl as instillation in NPWT reduces the number of visits to the operating room and LOS. This has a significant impact on lowering the cost of care when HAPWOC is used.
    Language English
    Publishing date 2022-04-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2747273-5
    ISSN 2168-8184
    ISSN 2168-8184
    DOI 10.7759/cureus.24321
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