Position paper mixed ceramic and porcelain on mud example applications

Author(s):  
Nilufer Nazende Ozkanli

It has been observed that organic or inorganic materials such as grass, straw, fibrous plants, plant roots and mineral additives have been added to the ceramic bodies in order to be stronger throughout history. The use of paper as an additive material. It is known that in the past years, a mixture called ‘Papier Mache’ in India has been used in papermaking in ceramics. Nowadays, many ceramic artists use paper additives in their artistic applications. Cellulosic fibres are a ceramics body since it prevents creaking of the ceramic during the course of drying of the ceramic due to its binding properties when mixed with clay as well as its lightness after firing. In this study, the use of the paper additive in kaolin, some sample applications and samples from artist works have been presented.Keywords: Porcelain, artistic ceramic, paper additive ceramic.

1992 ◽  
Vol 13 (1) ◽  
pp. 144-151
Author(s):  
Susan Bennett

Through this position paper the author seeks to provide a focus for extended discussion of some of the key issues arising from feminist approaches to theatre research. She indicates some of the insights made possible by feminist theoretical analyses of theatre historiography as well as some of the implications of the various positions inscribed in articles on Canadian feminist theatre historiography over the past ten years. The author hopes to facilitate more discussion of the wide variety of feminist challenges to and transformation of the theory and practice of theatre research and theatre historiography.


2020 ◽  
Vol 1 (2) ◽  
pp. 6-12
Author(s):  
ilker bekir topçu

Many studies have been carried out on the problems of civil engineering with the change of human problems today and in the past. These studies contributed to the development of concrete technology. Concrete is an important building material consisting of mixing aggregate, cement and water with or without chemical and mineral additives since the first day of use. Concrete technology has made great progress and continues. With developing concrete technology, self-cleaning concretes have emerged. Many studies have been conducted on self-cleaning concretes by researchers. This article reviews the research published on self-cleaning concretes and presents its role in reducing environmental pollution and its place in future engineering studies. When we look at the studies on self-cleaning concretes that emerged as a result of the developments in concrete technology, it is seen that the developments have progressed considerably. Contemporary civil engineering has provided a highly effective solution for the solution of modern problems. Environmentally friendly building materials will fulfil their duty in reducing air pollution, one of the biggest problems of our time. Self-cleaning buildings and roads that reduce pollution may sound like futuristic ideas, but it is not far away to encounter these structures more widely in our country and our world.


2020 ◽  
Author(s):  
Nele Klinkenberg ◽  
Sophia Kraft ◽  
Sebastian Polarz

Better carbon capture materials are crucial for managing today’s and the future CO<sub>2</sub> level in the atmosphere. The past focus was on increasing adsorption capacities. One knows by now that controlling the heat of adsorption (DH<sub>ads</sub>) is equally important. Is it too low, CO<sub>2</sub> uptake takes place at unfavorable conditions far from ambient and with insufficient selectivity. Is it too high, chemisorption occurs, and the materials can hardly be regenerated. The conventional approach for influencing DH<sub>ads</sub> is the modification of the adsorbing center. This paper proposes an alternative strategy. The hypothesis is that fine-tuning of the molecular environment in direct vicinity to the adsorbing center (primary amines) is a powerful tool for the adjustment of CO<sub>2</sub>-binding properties. Via click chemistry, any desired neighboring group (NG) can be incorporated on the surfaces of the resulting bifunctional, nanoporous organosilica materials. Passive NGs induce a change of the polarity of the surface, whereas active NGs are capable of a direct interaction with the active-center/ CO<sub>2</sub>pair. The effects on DH<sub>ads</sub> and also on the selectivity are studied in detail. A situation can be realized on the surface which resembles frustrated Lewis acid-base pairs, and the investigation of the binding-species by <sup>13</sup>C solid-state NMR indicate that the push-pull effects could play an essential role not only for CO<sub>2 </sub>adsorption but also for its activation.


Cancers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 3392
Author(s):  
Christina Stathopoulos ◽  
Livia Lumbroso-Le Rouic ◽  
Annette C. Moll ◽  
Manoj Parulekar ◽  
Philippe Maeder ◽  
...  

Secondary enucleation (SE) puts an irreversible end to eye-preserving therapies, whenever their prolongation is expected to violate the presumed state of metastatic grace. At present, it must be acknowledged that clear criteria for SE are missing, leading to empiric and subjective indications commonly related to disease progression or relapse, disease persistence masking the optic nerve head or treatment-related complications obscuring the fundus view. This absence of evidence-based consensus regarding SE is explained by the continuously moving frontiers of the conservative management as a result of diagnostic and therapeutic advances, as well as by the lack of studies sufficiently powered to accurately stratify the risk of metastasis in conservatively treated patients. In this position paper of the European Retinoblastoma Group (EURbG), we give an overview of the progressive shift in the indications for SE over the past decades and propose guidelines to assist decision-making with respect to when SE becomes imperative or recommended, with corresponding absolute and relative SE indications. Further studies and validation of biologic markers correlated with the risk of metastasis are expected to set more precisely the frontiers of conservative management and thus consensual criteria for SE in the future.


2020 ◽  
Vol 322 ◽  
pp. 01022
Author(s):  
Teresa Stryszewska ◽  
Marta Dudek

Over the past years, many research projects in the field of construction have been based on the concept of intelligent materials. One example of such materials is self-healing concrete. This material has the ability to repair the damage that occurs, which in concrete materials means filling/closing the cracks formed. This paper describes autonomous concrete that heals itself thanks to modifications with mineral additives. The study used the basic method of evaluating the effectiveness of the healing process, which is visual observation of the material. For this purpose, tests were performed using optical, digital and electron microscopes. In addition to the observations, a chemical analysis of the composition was performed using the EDS detector mounted on the SEM. The findings indicate the ability of filling cracks with accumulating products of reaction with water.


Te Kaharoa ◽  
2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Kane Milne

I am an Indigenous Practitioner, but I am still on a journey to discover what that truly means. Our struggle as Māori in Aotearoa, as a colonised people, has created a raft of inter-generational issues that we are still feeling and dealing with. For me growing up, it has been hard to fully embrace my “taha Māori”. Although I went to a Māori high-school, and my whanau identified strongly with our Māori heritage, outside these spaces, “being pakeha” offered advantages I would never have received had I looked Māori. It is only in the past 15 or so years that I have truly come to understand the power, resilience, love and grace of te ao Māori. And here I find myself, challenged to position myself in this world, and therefor to be able to define what it means to be Indigenous. On the surface the word Indigenous seems self-evident, but I actually need to understand its significance, its use in both local and global contexts, and how it impacts how we do what we do. It appears to me as if we go through decades where a particular set of words become the every-day buzzwords. Over the past couple of years, I have often said to people that I work with, that while innovation is the buzzword of this decade, indigenous will be the buzzword of the next decade. What I mean by this is that I can see the word indigenous being used and commercialised by western organisations and systems, with little or no regard to the true understanding of what it means to be indigenous. We only need to google “cultural appropriation” to see examples of this in practice. While I only have anecdotal evidence of this trend, living in a world that straddles both digital innovation and kaupapa Māori, I believe this to be true. In this position paper, I will explore the meanings of the words indigenous and indigeneity, and look at how they are used by various organisations around the world. I will define what indigenous means in my practice, and why I believe it is important for us, as Māori, to own the use of Indigenous and Indigeneity in Aotearoa.


2021 ◽  
Author(s):  
Emilija Milović ◽  
◽  
Nenad Janković ◽  
Jelena Petronijević ◽  
Nenad Joksimović

Tetrahydropyrimidines (THPMs) attracted attention as a very important class of aza heterocycles with broad pharmacological activities during the past years. In many studies have been proven that THPMs have anticancer, anti-inflammatory, antimicrobial, antioxidant, antifungal, anti-HIV activity. Bearing in mind our interest in medicinal and Biginelli chemistry, we investigated interaction with important biomacromolecules (DNA, BSA) and our earlier synthetized THPMs derivatives with proven very good cytotoxic activity.[1] Investigation of affinity of compounds A and B (Figure 1) to bind to bovine serum albumin (BSA) is based on the fact that the efficiency of drugs depends on their ability to bind for carrier protein. Binding properties were investigated by using the fluorescence emission titration of BSA with A and B. The obtained values of Ka, which are in optimum range which is considered to be 106-107M-1 indicate that both compounds have great ability to bind to BSA. In addition, Ka values for A-BSA and B-BSAshow that both compounds are suitable for drug-cell


2001 ◽  
Vol 9 (2) ◽  
pp. 30-32
Author(s):  
Andreas Taubert

The synthesis of inorganic materials of a specific size and shape is a key aspect in modern powder technology. During the past two decades, solution-based precipitation reactions have been explored for controlled particle formation. A wide variety of particle shapes, sizes, and compositions has been demonstrated. However, several questions, especially concerning particle nucleation, remain. Some of these questions are currently addressed by investigating precipitate (ex situ) at different reaction stages by means of powder x-ray diffraction (PXRD), scanning (SEM) and transmission electron microscopy (TEM).


2019 ◽  
Vol 9 (7) ◽  
pp. 1422 ◽  
Author(s):  
Kwok Shah ◽  
Su-Xi Wang ◽  
Debbie Soo ◽  
Jianwei Xu

The past few decades have witnessed considerable progress of conducting polymer-based organic thermoelectric materials due to their significant advantages over the traditional inorganic materials. The nanostructure engineering and performance investigation of these conducting polymers for thermoelectric applications have received considerable interest but have not been well documented. This review gives an outline of the synthesis of various one-dimensional (1D) structured conducting polymers as well as the strategies for hybridization with other nanomaterials or polymers. The thermoelectric performance enhancement of these materials in association with the unique morphologies and structures are discussed. Finally, perspectives and suggestions for the future research based on these interesting nanostructuring methodologies for improvement of thermoelectric materials are also presented.


Sign in / Sign up

Export Citation Format

Share Document