scholarly journals Hydrogels in Hand Sanitizers

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1577
Author(s):  
Carla Villa ◽  
Eleonora Russo
Keyword(s):  
Hand Hygiene ◽  
Rheological Properties ◽  
Food Industry ◽  
Aqueous Media ◽  
Synthetic Polymers ◽  
Cellulose Derivatives ◽  
Thickening Behavior ◽  
And Behaviors ◽  
Legal Frameworks ◽  
At Home

Hand hygiene can be considered a strategic key useful in the containment of infections such as COVID-19 both at home and in communities because it can dramatically reduce the widespread outbreak of infections. In case of the unavailability of soap and water, “instant” hand sanitizers are recommended because their application can be considered easy, versatile, quick and often less aggressive for the skin. For these reasons, alcoholic and alcohol-free hand rub gels can be considered the best performing formulations on the market. Together with disinfectants and antiseptic agents, hydrogels play a fundamental role in obtaining stable formulations and are easy to disperse, with a pleasant skin feel and an overall good performance. Several compounds commonly used in the pharmaceutical, cosmetic and food industry are available for this purpose, in particular, cellulose derivatives and synthetic polymers derivatives. Each of them is available in several grades, presenting different thickening behavior, rheological properties and compatibility with other ingredients, alcohols in particular. For all these reasons, it is important to explore hydrogel properties and behaviors in different contexts (i.e., hydroalcoholic and aqueous media) in order to develop new and performing hand rub gels, always taking into account the different international legal frameworks regarding disinfectant and sanitizing formulations.

scholarly journals ANNEALING OF UNFERMENTED (POLVILHO DOCE) AND FERMENTED (POLVILHO AZEDO) CASSAVA STARCHES

2010 ◽  
Vol 28 (2) ◽  
Author(s):  
ANIDA MARIA MORAES GOMES ◽  
CLÁUDIO ERNANI MENDES DA SILVA ◽  
PALOMA LIMA DA SILVA ◽  
NÁGILA MARIA PONTES SILVA RICARDO ◽  
MARIA ISABEL GALLÃO
Keyword(s):  
Rheological Properties ◽  
Food Industry ◽  
Annealing Treatment ◽  
Point Of View ◽  
Swelling Power ◽  
Double Helices ◽  
Power Peak ◽  
Waxy Starch ◽  
Pasting Temperature

The effects of annealing on the properties of unfermented (polvilho doce-PD) and fermented (polvilho azedo-PAD) cassava starches were studied. The samples were submitted to annealing treatment for 24, 72, 96, 144, 192 and 240 hours. The annealing treatment changed the main physicochemical (gelatinization, enthalpy and temperature) and rheological properties (swelling power, peak viscosity and pasting temperature) of the both samples. The increase in the gelatinization temperatures and the narrowing of the gelatinization range was attributed to an reinforcement in the packing of the double helices of the amylopectin. The PAD samples seemed to be more affected by this treatment than PD ones. The PAD samples presented some characteristics of a waxy starch, such as increased crystallinity and increased stability of the pastes, which from a technological point of view is very important to diversify further its use in the food industry.

Preparation, characterization and novel photoregulated rheological properties of azobenzene functionalized cellulose derivatives and their α-CD complexes

Polymer ◽  
2004 ◽  
Vol 45 (18) ◽  
pp. 6219-6225 ◽  
Author(s):  
X. Hu ◽  
P.J. Zheng ◽  
X.Y. Zhao ◽  
L. Li ◽  
K.C. Tam ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Cellulose Derivatives

scholarly journals Patients' Hand Hygiene at Home Predicts Their Hand Hygiene Practices in the Hospital

2014 ◽  
Vol 35 (5) ◽  
pp. 585-588 ◽  
Author(s):  
Anna Barker ◽  
Ajay Sethi ◽  
Emily Shulkin ◽  
Rachell Caniza ◽  
Sara Zerbel ◽  
...  
Keyword(s):  
Hand Hygiene ◽  
Intrinsic Value ◽  
Healthcare Associated Infections ◽  
Hospital Hygiene ◽  
Factors Associated ◽  
Hygiene Practices ◽  
Hospital Patients ◽  
Hospital Practices ◽  
Healthcare Associated ◽  
At Home

We examine factors associated with hand hygiene practices of hospital patients. Hygiene in the hospital decreased compared to that at home, and home practices were strongly associated with hospital practices. Understanding and leveraging the intrinsic value some patients associate with hand hygiene may be important for improving overall hospital hygiene and decreasing healthcare-associated infections.

Rheological properties in aqueous media of three new bacterial polysaccharides from marine origin

1991 ◽  
Vol 5 (1-2) ◽  
pp. 167-169 ◽  
Author(s):  
P. Aymard ◽  
G. Cuvelier ◽  
B. Launay ◽  
J. Guezennec ◽  
G. Barbier ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Aqueous Media ◽  
Marine Origin

scholarly journals When Values Get in the Way of Conversations: Reflections on Dealing With Discriminatory Remarks and Behaviors in Qualitative Interviewing

2020 ◽  
Vol 19 ◽  
pp. 160940692096540
Author(s):  
S. T. Kulnik ◽  
J. Egbunike ◽  
J. Francois
Keyword(s):  
Healthcare Professionals ◽  
Qualitative Interviews ◽  
Qualitative Interview ◽  
Critical Discussion ◽  
Critical Examination ◽  
Qualitative Interviewing ◽  
Qualitative Interview Study ◽  
Practical Guidance ◽  
And Behaviors ◽  
Legal Frameworks

As healthcare researchers conducting qualitative interviews, we might encounter participants who make remarks or display behaviors which go against principles of valuing diversity, equality and human rights; in other words, remarks and behaviors which could indicate racist, homophobic, xenophobic, islamophobic, sexist, misogynist, classist, etc. views and attitudes. In this article, we offer our reflections on how as researchers we might deal with such situations. We draw on methodological literature and on our own experiences as researchers, educators and practitioners in healthcare, to provide a critical discussion around researcher awareness and anticipation of emotional triggers, management and leadership of research, and understanding of ethics and legal frameworks of equality. We summarize and signpost toward methodological views under which such instances might be considered, including interpretivist and constructivist interpretations, and the concepts of positionality and adversarial discourse. Lastly, we offer practical suggestions for dealing with such occurrences in the context of qualitative research studies in healthcare, and for using researcher reflexivity as a strategy to surface and work through these situations. We hope that this article will provide accessible theoretical and practical guidance, for example to healthcare professionals who embark on their first qualitative interview study as part of a postgraduate course. Equally, we hope that this article will be of interest to more experienced researchers and invite further critical examination of the issues we highlight.

The Effect of Pre-Vulcanization Temperature on Mechanical and Rheological Properties of Starch Filled Natural Rubber Latex Compounds

2013 ◽  
Vol 858 ◽  
pp. 184-189
Author(s):  
Siti Rohana Yahya ◽  
Farah Nadiah Hamdan ◽  
Azura A. Rashid ◽  
Baharin Azahari
Keyword(s):  
Natural Rubber ◽  
Rheological Properties ◽  
Room Temperature ◽  
Natural Rubber Latex ◽  
Shear Thickening ◽  
Filler Loading ◽  
Latex Films ◽  
Rubber Latex ◽  
Thickening Behavior ◽  
Vulcanization Process

The main objective of this study was to investigate the effect of the pre-vulcanization temperature on mechanical and rheological properties of starch filled natural rubber (NR) latex films. The 10 phr filler loading of starch was added into the latex prior to the pre-vulcanization process at 60°C to 140°C. The dipped films were cured in the oven at 100°C for 20 minutes and cooled at room temperature for 24 hours before stripping. The rheological properties of NR latex compounds were studied based on the viscosity measurement. The tensile and tear tests of starch filled NR latex films were also carried out. The results indicated that the rheological properties of the latex compounds showed shear thickening behavior where viscosity was increased with the increase in shear rate and pre-vulcanization temperature proportionally. The pre-vulcanization temperature at 80°C showed the optimum mechanical properties of starch filled NR latex films.

scholarly journals Rheological properties of gellan gum in aqueous media.

1989 ◽  
Vol 53 (3) ◽  
pp. 771-776 ◽  
Author(s):  
Masakuni TAKO ◽  
Ayano SAKAE ◽  
Sanehisa NAKAMURA
Keyword(s):  
Rheological Properties ◽  
Aqueous Media ◽  
Gellan Gum
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