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  1. Article ; Online: Explicit Expressions for a Mean Nanofibre Diameter Using Input Parameters in the Process of Electrospinning.

    Filip, Petr

    Polymers

    2023  Volume 15, Issue 16

    Abstract: The process of electrospinning is subject to a variety of input parameters ranging from the characterization of polymers and solvents, the resulting solutions, the geometrical configuration of the device, including its process parameters, and ending with ...

    Abstract The process of electrospinning is subject to a variety of input parameters ranging from the characterization of polymers and solvents, the resulting solutions, the geometrical configuration of the device, including its process parameters, and ending with crucial parameters such as temperature and humidity. It is not possible to expect that functional expressions relating all these parameters can be derived in a common description. Nevertheless, it is possible to fix the majority of these parameters to derive explicit relations for a restricted number of entry parameters such that it contributes to the partial elimination of the classical trial-and-error method saving time and financial costs. However, several contributions providing such results are rather moderate. Special attention is provided to fibre diameter approximation as this parameter strongly influences the application of nanofibrous mats in various instances such as air filtration, tissue engineering, and drug delivery systems. Various difficulties connected with the derivation of these explicit relations are presented and discussed in detail.
    Language English
    Publishing date 2023-08-11
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527146-5
    ISSN 2073-4360 ; 2073-4360
    ISSN (online) 2073-4360
    ISSN 2073-4360
    DOI 10.3390/polym15163371
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Commentary: From the lab to clinical reality: Small step or giant leap?

    Casselman, Filip P A

    The Journal of thoracic and cardiovascular surgery

    2023  Volume 167, Issue 4, Page(s) e92–e93

    Language English
    Publishing date 2023-05-08
    Publishing country United States
    Document type Editorial
    ZDB-ID 3104-5
    ISSN 1097-685X ; 0022-5223
    ISSN (online) 1097-685X
    ISSN 0022-5223
    DOI 10.1016/j.jtcvs.2023.05.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Uk I Zs.104: Show issues Location:
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  3. Article ; Online: Case closed?

    Casselman, Filip P

    European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery

    2021  Volume 60, Issue 2, Page(s) 295–296

    MeSH term(s) Aortic Valve ; Aortic Valve Insufficiency ; Humans
    Language English
    Publishing date 2021-05-29
    Publishing country Germany
    Document type Editorial ; Comment
    ZDB-ID 639293-3
    ISSN 1873-734X ; 1010-7940 ; 1567-4258
    ISSN (online) 1873-734X
    ISSN 1010-7940 ; 1567-4258
    DOI 10.1093/ejcts/ezab013
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2303: Show issues Location:
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    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  4. Article ; Online: Modification of Polyvinyl Chloride Composites for Radiographic Detection of Polyvinyl Chloride Retained Surgical Items.

    Polaskova, Martina / Sedlacek, Tomas / Polasek, Zdenek / Filip, Petr

    Polymers

    2023  Volume 15, Issue 3

    Abstract: The ever-present risk of surgical items being retained represents a real medical peril for the patient and potential liability issues for medical staff. Radiofrequency scanning technology is a very good means to substantially reduce such accidents. ... ...

    Abstract The ever-present risk of surgical items being retained represents a real medical peril for the patient and potential liability issues for medical staff. Radiofrequency scanning technology is a very good means to substantially reduce such accidents. Radiolucent medical-grade polyvinyl chloride (PVC) used for the production of medical items is filled with radiopaque agents to enable X-ray visibility. The present study proves the suitability of bismuth oxychloride (BiOCl) and documents its advantages over the classical radiopaque agent barium sulfate (BaSO
    Language English
    Publishing date 2023-01-23
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527146-5
    ISSN 2073-4360 ; 2073-4360
    ISSN (online) 2073-4360
    ISSN 2073-4360
    DOI 10.3390/polym15030587
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Redo surgical biological valve replacement: Gone with the wind?

    Casselman, Filip P

    The Journal of thoracic and cardiovascular surgery

    2018  Volume 156, Issue 4, Page(s) 1355–1356

    MeSH term(s) Aortic Valve/surgery ; Benchmarking ; Heart Valve Prosthesis Implantation ; Humans ; Patient Selection
    Language English
    Publishing date 2018-04-13
    Publishing country United States
    Document type Editorial ; Comment
    ZDB-ID 3104-5
    ISSN 1097-685X ; 0022-5223
    ISSN (online) 1097-685X
    ISSN 0022-5223
    DOI 10.1016/j.jtcvs.2018.04.020
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Uk I Zs.104: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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  6. Article ; Online: Electrospun Sound-Absorbing Nanofibrous Webs from Recycled Poly(vinyl butyral).

    Filip, Petr / Sedlacek, Tomas / Peer, Petra / Juricka, Martin

    Polymers

    2022  Volume 14, Issue 22

    Abstract: The amount of poly(vinyl butyral) (PVB) foils added to car windscreens to suppress glass shattering represents a huge worldwide volume of the material, and once a vehicle is end-of-life it also becomes a significance contributor to landfill. The ... ...

    Abstract The amount of poly(vinyl butyral) (PVB) foils added to car windscreens to suppress glass shattering represents a huge worldwide volume of the material, and once a vehicle is end-of-life it also becomes a significance contributor to landfill. The recycling of PVB materials from windscreens has been expensive and despite improvements in recycling technologies, the landfill burden still increases. However, an increase in oil prices can shift the economic balance and stimulates the possible applicability of recycled PVB. As PVB is a relatively easy electrospinnable material, it is shown that nanofibrous mats produced from recycled PVB blends in ethanol exhibit very good sound-absorbing properties. To achieve an optimal composition between virgin and recycled PVB blends, a series of their ratios was consecutively characterized using various techniques (rheometry, SEM, FTIR, DSC, TGA, DMA, an impedance tube for determining sound absorbance). The best result was obtained with two wt. portions of 8 wt.% solution of virgin PVB in ethanol and one wt. portion of 12 wt.% solution of recycled PVB in ethanol.
    Language English
    Publishing date 2022-11-21
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527146-5
    ISSN 2073-4360 ; 2073-4360
    ISSN (online) 2073-4360
    ISSN 2073-4360
    DOI 10.3390/polym14225049
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Relation between sensory analysis and rheology of body lotions.

    Moravkova, T / Filip, P

    International journal of cosmetic science

    2016  Volume 38, Issue 6, Page(s) 558–566

    Abstract: Objective: Evaluation of sensory attributes of cosmetic products is traditionally based on sensory panels. However, in some cases, a suitable candidate method that can reduce time and costs is the use of instrumental analysis that can detect relatively ... ...

    Abstract Objective: Evaluation of sensory attributes of cosmetic products is traditionally based on sensory panels. However, in some cases, a suitable candidate method that can reduce time and costs is the use of instrumental analysis that can detect relatively very small changes of entry ingredients. Such approach has been already applied for emollients, salt content, stabilizers, etc. The aim of this contribution is to apply the relations between sensory analysis and rheology to a series of body lotions differing in the contents of emulsifiers and viscosity regulators.
    Methods: Sensory and rheological analyses are related. Rheological analysis can represent a good alternative to basic orientation in chosen customer's feelings. A rotational rheometer is the only instrumental device required for the measurements.
    Results: An empirical rheological model was proposed by means of which the selected sensory attributes were evaluated using the numerical values of adjustable model parameters. This approach exhibited a very good agreement with the results obtained by the sensory panel.
    Conclusion: It was shown that a description of chosen sensory attributes can be responsibly carried out by rheological measurements, that is through the attained numerical values of the parameters appearing in a proposed empirical model characterizing shear viscosity of body lotions.
    MeSH term(s) Emollients ; Humans ; Rheology
    Chemical Substances Emollients
    Language English
    Publishing date 2016-12
    Publishing country England
    Document type Journal Article
    ZDB-ID 198917-0
    ISSN 1468-2494 ; 0142-5463
    ISSN (online) 1468-2494
    ISSN 0142-5463
    DOI 10.1111/ics.12319
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.B 2391: Show issues Location:
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  8. Article ; Online: An Estimate of the Onset of Beadless Character of Electrospun Nanofibers Using Rheological Characterization.

    Peer, Petra / Zelenkova, Jana / Filip, Petr / Lovecka, Lenka

    Polymers

    2021  Volume 13, Issue 2

    Abstract: Electrospinning represents the very effective process of producing nanofibrous mats. This process is influenced by a number of mutually and strongly interlaced entry parameters (characteristics of polymer, solvent, process parameters) and their ... ...

    Abstract Electrospinning represents the very effective process of producing nanofibrous mats. This process is influenced by a number of mutually and strongly interlaced entry parameters (characteristics of polymer, solvent, process parameters) and their participation in the resulting nanofiber quality. The appearance of nanofibers is a result of the necessary primary experimental parameter setting within an acceptable range. However, finer analysis of nanofiber quality depends on the proper choice of these individual factors. The aim of this contribution is to evaluate one of the key factors-polymer concentration-with respect to the presence or absence of bead formation. This passage can be approximated by rheological oscillatory measurements when a sudden decrease in phase angle indicates this change. It replaces otherwise time- and cost-consuming trial-and-error experiments. This approach was tested using three different materials: solutions of poly(vinylidene fluoride-
    Language English
    Publishing date 2021-01-14
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527146-5
    ISSN 2073-4360 ; 2073-4360
    ISSN (online) 2073-4360
    ISSN 2073-4360
    DOI 10.3390/polym13020265
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Electrospinning of a Copolymer PVDF-

    Filip, Petr / Zelenkova, Jana / Peer, Petra

    Polymers

    2021  Volume 13, Issue 19

    Abstract: The process of electrospinning polymer solutions depends on many entry parameters, with each having a significant impact on the overall process and where complexity prevents the expression of their interplay. However, under the assumption that most ... ...

    Abstract The process of electrospinning polymer solutions depends on many entry parameters, with each having a significant impact on the overall process and where complexity prevents the expression of their interplay. However, under the assumption that most parameters are fixed, it is possible to evaluate the mutual relations between pairs or triples of the chosen parameters. In this case, the experiments were carried out with a copolymer poly(vinylidene-
    Language English
    Publishing date 2021-10-05
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527146-5
    ISSN 2073-4360 ; 2073-4360
    ISSN (online) 2073-4360
    ISSN 2073-4360
    DOI 10.3390/polym13193418
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Bidirectional Association Between Sleep and Brain Atrophy in Aging.

    Kokošová, Viktória / Filip, Pavel / Kec, David / Baláž, Marek

    Frontiers in aging neuroscience

    2021  Volume 13, Page(s) 726662

    Abstract: Human brain aging is characterized by the gradual deterioration of its function and structure, affected by the interplay of a multitude of causal factors. The sleep, a periodically repeating state of reversible unconsciousness characterized by distinct ... ...

    Abstract Human brain aging is characterized by the gradual deterioration of its function and structure, affected by the interplay of a multitude of causal factors. The sleep, a periodically repeating state of reversible unconsciousness characterized by distinct electrical brain activity, is crucial for maintaining brain homeostasis. Indeed, insufficient sleep was associated with accelerated brain atrophy and impaired brain functional connectivity. Concurrently, alteration of sleep-related transient electrical events in senescence was correlated with structural and functional deterioration of brain regions responsible for their generation, implying the interconnectedness of sleep and brain structure. This review discusses currently available data on the link between human brain aging and sleep derived from various neuroimaging and neurophysiological methods. We advocate the notion of a mutual relationship between the sleep structure and age-related alterations of functional and structural brain integrity, pointing out the position of high-quality sleep as a potent preventive factor of early brain aging and neurodegeneration. However, further studies are needed to reveal the causality of the relationship between sleep and brain aging.
    Language English
    Publishing date 2021-12-08
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2558898-9
    ISSN 1663-4365
    ISSN 1663-4365
    DOI 10.3389/fnagi.2021.726662
    Database MEDical Literature Analysis and Retrieval System OnLINE

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