scholarly journals Physically Switchable Antimicrobial Surfaces and Coatings: General Concept and Recent Achievements

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3083
Author(s):  
Roman Elashnikov ◽  
Pavel Ulbrich ◽  
Barbora Vokatá ◽  
Vladimíra Svobodová Pavlíčková ◽  
Václav Švorčík ◽  
...  
Keyword(s):  
Food Packaging ◽  
Bacterial Colonization ◽  
Hybrid Approach ◽  
General Concept ◽  
Physical Activation ◽  
Surface Activation ◽  
Surface Protection ◽  
Nanostructured Surfaces ◽  
Antimicrobial Surfaces ◽  
Smart Surfaces

Bacterial environmental colonization and subsequent biofilm formation on surfaces represents a significant and alarming problem in various fields, ranging from contamination of medical devices up to safe food packaging. Therefore, the development of surfaces resistant to bacterial colonization is a challenging and actively solved task. In this field, the current promising direction is the design and creation of nanostructured smart surfaces with on-demand activated amicrobial protection. Various surface activation methods have been described recently. In this review article, we focused on the “physical” activation of nanostructured surfaces. In the first part of the review, we briefly describe the basic principles and common approaches of external stimulus application and surface activation, including the temperature-, light-, electric- or magnetic-field-based surface triggering, as well as mechanically induced surface antimicrobial protection. In the latter part, the recent achievements in the field of smart antimicrobial surfaces with physical activation are discussed, with special attention on multiresponsive or multifunctional physically activated coatings. In particular, we mainly discussed the multistimuli surface triggering, which ensures a better degree of surface properties control, as well as simultaneous utilization of several strategies for surface protection, based on a principally different mechanism of antimicrobial action. We also mentioned several recent trends, including the development of the to-detect and to-kill hybrid approach, which ensures the surface activation in a right place at a right time.

scholarly journals Nanotechnology-Based Antimicrobial and Antiviral Surface Coating Strategies

Prosthesis ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 25-52
Author(s):  
Pelin Erkoc ◽  
Fulden Ulucan-Karnak
Keyword(s):  
Biological Sciences ◽  
Clinical Performance ◽  
Global Strategy ◽  
Surface Coatings ◽  
Cationic Polymers ◽  
Functional Material ◽  
Metal Coatings ◽  
Antimicrobial Surfaces ◽  
Smart Surfaces ◽  
Surface Development

Biocontamination of medical devices and implants is a growing issue that causes medical complications and increased expenses. In the fight against biocontamination, developing synthetic surfaces, which reduce the adhesion of microbes and provide biocidal activity or combinatory effects, has emerged as a major global strategy. Advances in nanotechnology and biological sciences have made it possible to design smart surfaces for decreasing infections. Nevertheless, the clinical performance of these surfaces is highly depending on the choice of material. This review focuses on the antimicrobial surfaces with functional material coatings, such as cationic polymers, metal coatings and antifouling micro-/nanostructures. One of the highlights of the review is providing insights into the virus-inactivating surface development, which might particularly be useful for controlling the currently confronted pandemic coronavirus disease 2019 (COVID-19). The nanotechnology-based strategies presented here might be beneficial to produce materials that reduce or prevent the transmission of airborne viral droplets, once applied to biomedical devices and protective equipment of medical workers. Overall, this review compiles existing studies in this broad field by focusing on the recent related developments, draws attention to the possible activity mechanisms, discusses the key challenges and provides future recommendations for developing new, efficient antimicrobial and antiviral surface coatings.

scholarly journals Production Method that Leads to TiO2 Nanofibrous Structure Usable in Food Packaging

2016 ◽  
Vol 19 (4) ◽  
pp. 107-109
Author(s):  
Radovan Kovář
Keyword(s):  
Food Safety ◽  
Food Packaging ◽  
Continuous Furnace ◽  
Production Method ◽  
Fiber Structure ◽  
Optimal Temperature ◽  
Special Design ◽  
Antimicrobial Surfaces ◽  
Nanofibrous Structure ◽  
Temperature Load

Abstract Burned inorganic nanofibers most often occur in the nature in two forms: rutile and anatase. Today, the production of rutile is about to end, while anatase provides more application possibilities. The resulting fiber structure is determined by calcination. It is necessary to find the optimal temperature as well as time, during which the fibers must withstand temperature load. For such method of calcination, it is necessary to create a special design of continuous furnace. Anatase has application in food packaging. Packages containing anatase are used for: food safety, improved packaging for spoilage reduction, sensors for detection of pathogens and spoilage, disinfectants and antimicrobial surfaces.

Fusion and Fission Processes in Exocytosis: Possible Roles for Synexin and Osmotic Lysis in the Two Events

1980 ◽  
Vol 38 ◽  
pp. 594-597
Author(s):  
H.B. Pollard ◽  
C.E. Creutz ◽  
C.J. Pazoles ◽  
J.H. Scott
Keyword(s):  
Small Molecules ◽  
Chromaffin Cells ◽  
Adrenal Glands ◽  
General Concept ◽  
Extracellular Calcium ◽  
Large Protein ◽  
Granule Membrane ◽  
Osmotic Lysis ◽  
Per Se ◽  
Chemical Evidence

Exocytosis is a general concept describing secretion of enzymes, hormones and transmitters that are otherwise sequestered in intracellular granules. Chemical evidence for this concept was first gathered from studies on chromaffin cells in perfused adrenal glands, in which it was found that granule contents, including both large protein and small molecules such as adrenaline and ATP, were released together while the granule membrane was retained in the cell. A number of exhaustive reviews of this early work have been published and are summarized in Reference 1. The critical experiments demonstrating the importance of extracellular calcium for exocytosis per se were also first performed in this system (2,3), further indicating the substantial service given by chromaffin cells to those interested in secretory phenomena over the years.

Surgical and endovascular hybrid approach in peripheral arterial disease of the lower limbs

VASA ◽  
2016 ◽  
Vol 45 (5) ◽  
pp. 417-422 ◽  
Author(s):  
Anouk Grandjean ◽  
Katia Iglesias ◽  
Céline Dubuis ◽  
Sébastien Déglise ◽  
Jean-Marc Corpataux ◽  
...  
Keyword(s):  
Mortality Rate ◽  
Peripheral Arterial Disease ◽  
Limb Salvage ◽  
Hybrid Approach ◽  
Arterial Disease ◽  
Early Mortality ◽  
Secondary Patency ◽  
Limb Salvage Rate ◽  
Peripheral Arterial ◽  
Salvage Rate

Abstract. Background: Multilevel peripheral arterial disease is frequently observed in patients with intermittent claudication or critical limb ischemia. This report evaluates the efficacy of one-stage hybrid revascularization in patients with multilevel arterial peripheral disease. Patients and methods: A retrospective analysis of a prospective database included all consecutive patients treated by a hybrid approach for a multilevel arterial peripheral disease. The primary outcome was the patency rate at 6 months and 1 year. Secondary outcomes were early and midterm complication rate, limb salvage and mortality rate. Statistical analysis, including a Kaplan-Meier estimate and univariate and multivariate Cox regression analyses were carried out with the primary, primary assisted and secondary patency, comparing the impact of various risk factors in pre- and post-operative treatments. Results: 64 patients were included in the study, with a mean follow-up time of 428 days (range: 4 − 1140). The technical success rate was 100 %. The primary, primary assisted and secondary patency rates at 1 year were 39 %, 66 % and 81 %, respectively. The limb-salvage rate was 94 %. The early mortality rate was 3.1 %. Early and midterm complication rates were 15.4 % and 6.4 %, respectively. The early mortality rate was 3.1 %. Conclusions: The hybrid approach is a major alternative in the treatment of peripheral arterial disease in multilevel disease and comorbid patients, with low complication and mortality rates and a high limb-salvage rate.

Macho Nachos

2015 ◽  
Vol 46 (4) ◽  
pp. 182-196 ◽  
Author(s):  
Luke (Lei) Zhu ◽  
Victoria L. Brescoll ◽  
George E. Newman ◽  
Eric Luis Uhlmann
Keyword(s):  
Gender Stereotypes ◽  
Food Packaging ◽  
Food Preferences ◽  
Healthy Food ◽  
Psychological Reactance ◽  
Unhealthy Food ◽  
Healthy Foods ◽  
Gender Schema ◽  
Male And Female ◽  
Schema Congruity

Abstract. The present studies examine how culturally held stereotypes about gender (that women eat more healthfully than men) implicitly influence food preferences. In Study 1, priming masculinity led both male and female participants to prefer unhealthy foods, while priming femininity led both male and female participants to prefer healthy foods. Study 2 extended these effects to gendered food packaging. When the packaging and healthiness of the food were gender schema congruent (i.e., feminine packaging for a healthy food, masculine packaging for an unhealthy food) both male and female participants rated the product as more attractive, said that they would be more likely to purchase it, and even rated it as tasting better compared to when the product was stereotype incongruent. In Study 3, packaging that explicitly appealed to gender stereotypes (“The muffin for real men”) reversed the schema congruity effect, but only among participants who scored high in psychological reactance.

VR system for mental and physical activation

2001 ◽  
Author(s):  
Mieko Ohsuga ◽  
Shotaro Miwa ◽  
Kazuo Hashima
Keyword(s):  
Physical Activation

Platelet Surface Activation Markers after DDAVP Infusion in Healthy Subjects

1995 ◽  
Vol 74 (03) ◽  
pp. 991-992 ◽  
Author(s):  
D A Tsakiris ◽  
W E Haefeli ◽  
L Linder ◽  
B Steiner ◽  
G A Marbet
Keyword(s):  
Healthy Subjects ◽  
Surface Activation ◽  
Activation Markers ◽  
Platelet Surface

Ale na razie tu cisza” – fotografie sprzed katastrofy w wybranych zapisach literackich (Stefan Chwin, Ryszard Kapuściński, Wisława Szymborska)

2020 ◽  
pp. 65-80
Author(s):  
Magdalena Strąk
Keyword(s):  
Time Perspective ◽  
Terrorist Attack ◽  
First World War ◽  
General Concept ◽  
Literary Texts ◽  
World War ◽  
The Past ◽  
The First World War ◽  
History Of ◽  
First World

The work aims to show a peculiar perspective of looking at photographs taken on the eve of the broadly understood disaster, which is specified in a slightly different way in each of the literary texts (Stefan Chwin’s autobiographical novel Krótka historia pewnego żartu [The brief history of a certain joke], a poem by Ryszard Kapuściński Na wystawie „Fotografia chłopów polskich do 1944 r.” [At an exhibition “The Polish peasants in photographs to 1944”] and Wisława Szymborska’s Fotografia z 11 września [Photograph from September 11]) – as death in a concentration camp, a general concept of the First World War or a terrorist attack. Upcoming tragic events – of which the photographed people are not yet aware – become for the subsequent recipient an inseparable element of reality contained in the frame. For the later observers, privileged with time perspective, the characters captured in the photograph are already victims of the catastrophe, which in reality was not yet recorded by the camera. It is a work about coexistence of the past and future in the field of photography.

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