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3. Mechanical strengths and ultrasonic pulse velocity evaluation of supersulfated cement mortar containing sodium sulfate

Author

Djayaprabha Herry Suryadi, Aliusius Jean Jessica, Pangestu Jerrica, and Candra Tiffany

Subjects
Environmental sciences, GE1-350
Abstract

The purpose of this study is to evaluate the mechanical strengths and ultrasonic pulse velocity (UPV) of supersulfated cement mortar incorporating sodium sulfate (Na2SO4) with various amounts of SO3 at 0 wt.%, 2.5 wt.%, 7.5 wt.%, and 10 wt.%. The results exhibited that the inclusion of Na2SO4 could significantly improve the 28-day compressive strength by about 2.94 to 4.26 times higher and the 28-day flexural strength by about 2.89 to 3.78 times higher, when compared with the mixture without Na2SO4. The 28-day UPV value for the mixture without the addition of Na2SO4 was 2931 m/s, which can be classified as very poor mortar quality; however, with the addition of Na2SO4, the 28-day UPV value could improve to 3687-3942 m/s, which can be classified as good to excellent mortar quality. In addition, an exponential equation with a coefficient of determination (R2) of 0.975 was also proposed to predict the relationship between compressive strength and UPV value. Based on the experimental findings, it could be concluded that the inclusion of Na2SO4 had a beneficial effect on enhancing the mechanical strengths and mortar quality of supersulfated cement mortar.

Published
2023
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10. Community-based research partnerships for co-constructing participatory forms of social justice research and action

Author

Schensul, Jean Jessica

Subjects
urban, research, participatory
Abstract

Questo contributo esamina due forme di co-costruzione di conoscenza e azione che hanno entrambe un impatto su questioni di giustizia sociale in contesti comunitari, la Participatory Action Research e la Community Based Participatory Research. Definisce la CBPR come alleanze tra organizzazioni comunitarie e partner universitari per il cambiamento; e la PAR come ricerca guidata dalla comunità per la costruzione di alleanze e per l’advocacy. Il documento descrive alcuni esempi di entrambe, illustrati attraverso il lavoro dell’Institute for Community Research, un’organizzazione di ricerca indipendente basata sulla comunità. Suggerisce argomenti sul motivo per cui gli antropologi dovrebbero considerare la formazione di organizzazioni di ricerca basate sulla comunità e i loro vantaggi nel condurre CBPR e PAR per affrontare le questioni di giustizia sociale. Rileva inoltre i vantaggi della collaborazione tra tali organizzazioni e le università per estendere la portata delle università e le risorse per la risoluzione dei problemi delle comunità. Il documento sostiene un maggiore coinvolgimento degli antropologi sia nella CBPR che nella PAR. This paper examines two forms of co-constructing knowledge and action both impacting on social justice issues in community settings, Participatory Action Research and Community Based Participatory Research. It defines CBPR as alliances between community organizations and university partners for change; and PAR as community-led research for alliance building and advocacy. The paper describes examples of both illustrated through work of the Institute for Community Research, an independent community based research organization. It suggests arguments for why anthropologists should consider the formation of community based research organizations and their advantages for conducting CBPR and PAR to address social justice issues. It also notes the advantages of university collaboration with such organizations to extend university reach and community problem solving resources. The paper endorses greater involvement of anthropologists in both CBPR and PAR., Tracce Urbane. Rivista Italiana Transdisciplinare di Studi Urbani, N. 8 (2020): FARE E CONOSCERE, INSIEME: SUPERARE GLI OSTACOLI E LE SFIDE DELLA RICERCA-AZIONE PER RENDERE IL MONDO UN POSTO MIGLIORE / TO DO AND KNOW SOMETHING TOGETHER: OVERCOMING THE CHALLENGES OF ACTION-RESEARCH IN MAKING BETTER URBAN WORLDS

Published
2020
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14. Buchbesprechungen

Author

Adler, Yael, Saloga, Joachim, Klimek, Ludger, Buhl, Roland, Mann, Wolf, Knop, Jürgen, Grabbe, Stephan, Jean, Jessica, Garcia-Perez, Martha Estrella, Guerard, Simon, and Pouliot, Roxane

Published
2012

15. Markers for an In vitro skin substitute

Author

Larouche, Danielle, Jean, Jessica, Berthod, François, Germain, Lucie, Pouliot, Roxane, Maguire, Tim, Novik, Eric, Larouche, Danielle, Jean, Jessica, Berthod, François, Germain, Lucie, Pouliot, Roxane, Maguire, Tim, and Novik, Eric

Abstract

The tissue engineering self-assembly approach allows the production of skin substitutes comprising both the dermis and epidermis, using methods promoting the secretion and organization of a dense extracellular matrix by skin cells. In a reconstructed epidermis, all cellular layers of the native tissue are present. An evaluation of the expression and localization of a number of specific protein markers revealed that the self-assembled, tissue-engineered skin substitute shares some common features with normal human skin, such as the expression of Ki-67, keratins 10 and 14, filaggrin, involucrin, transglutaminase, DLK, a3-integrin subunit, laminin-S, and collagens I, II, 1V, and VII. At the ultrastructural level, many differentiation markers can be observed, including desmosomes, as well as an organized basement membrane presenting hemidesmosomes, lamina densa, and lamina lucida. In this chapter, protocols to generate skin substitutes by the self-assembly approach will be presented and the methods including the labeling of the principal skin differentiation markers by immunofluorescence will be examined.

Published
2018

16. Markers for an In vitro skin substitute

Author

Maguire, Tim, Novik, Eric, Germain, Lucie, Jean, Jessica, Larouche, Danielle, Berthod, François, Pouliot, Roxane, Maguire, Tim, Novik, Eric, Germain, Lucie, Jean, Jessica, Larouche, Danielle, Berthod, François, and Pouliot, Roxane

Abstract

The tissue engineering self-assembly approach allows the production of skin substitutes comprising both the dermis and epidermis, using methods promoting the secretion and organization of a dense extracellular matrix by skin cells. In a reconstructed epidermis, all cellular layers of the native tissue are present. An evaluation of the expression and localization of a number of specific protein markers revealed that the self-assembled, tissue-engineered skin substitute shares some common features with normal human skin, such as the expression of Ki-67, keratins 10 and 14, filaggrin, involucrin, transglutaminase, DLK, a3-integrin subunit, laminin-S, and collagens I, II, 1V, and VII. At the ultrastructural level, many differentiation markers can be observed, including desmosomes, as well as an organized basement membrane presenting hemidesmosomes, lamina densa, and lamina lucida. In this chapter, protocols to generate skin substitutes by the self-assembly approach will be presented and the methods including the labeling of the principal skin differentiation markers by immunofluorescence will be examined., 0

Published
2018

19. Psoriasis: Causes, Treatments, and Pathological Models

Author

Jean, Jessica and Jean, Jessica

Subjects
Psoriasis
Abstract

Psoriasis is a common, inflammatory, multisystemic skin disease characterized by hyperproliferation and abnormal differentiation of epidermis. There is a wide variety of therapeutic options to treat psoriasis including topical, phototherapy, systemic and biological therapies. During the past decade, many pathological models have been developed to better understand psoriasis. Among them, in-vitro models offer an interesting alternative to animal models. The development of these models represents a key component in the fight against psoriasis. This book presents the characteristics of this pathology, the suggested causes, the treatments and the current state of research on pathological models to better understand mechanisms of psoriasis.

Published
2011

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