scholarly journals Chemically modified carbon nanostructures and 2D nanomaterials for fabrics performing under conditions of operational tension and extreme environmental conditions

2021 ◽  
Author(s):  
Ioanna Sideri ◽  
Nikos Tagmatarchis
Keyword(s):  
Everyday Life ◽  
Environmental Conditions ◽  
Carbon Nanostructures ◽  
Chemical Functionalization ◽  
Chemically Modified ◽  
2D Nanomaterials

Carbon nanostructures’ and 2D nanomaterials’ extensive research will come to fruition once these materials steadily join everyday-life applications. Their chemical functionalization unlocks their potentiality as carriers of customized properties and...

scholarly journals Analisis Mural Karya Arnis Muhammad Ditinjau Dari Segi Fungsi dan Gaya

2021 ◽  
Vol 4 (2) ◽  
pp. 767-773
Author(s):  
Alpiza Simah Budi ◽  
Daulat Saragi
Keyword(s):  
Everyday Life ◽  
Public Space ◽  
Environmental Conditions ◽  
General Public ◽  
Qualitative Method ◽  
Sampling Technique ◽  
Two Dimensional ◽  
Aesthetic Value ◽  
Work Of Art ◽  
Selection Of

This study aims to describe the function and style of the mural by Arnis Muhammad. Mural as art in public space, which means that the space for movement and the target audience for the audience and audience is the general public. As a two-dimensional work of art, mural is also inseparable from style. Visually, the style in a work of art is the selection of objects, techniques, colors, and environmental conditions, time, era, and environmental conditions in which an artist creates his work. The population in this research is that all of Arnis Muhammad's mural works for the 2017-2019 period are 51 works. In this study the authors took samples using purposive sampling technique. The reason for taking samples is the number of mural works that still exist and are still intact. There are 10 mural works in the research location. In this case, the writer examines these mural works based on their function and style. The method used in this research is descriptive qualitative method. The function of the mural by Arnis Muhammad is a personal function as a reflection of the resonance of the environment in which he lives. Social function, as a form of concern for the environment and the surrounding community in everyday life. Physical function, as an aesthetic value enhancer and the various ways the general public use it. Arnis Muhammad's murals tend to have a surreal and decorative style.

scholarly journals Tom Pouce III, an Electronic White Cane for Blind People: Ability to Detect Obstacles and Mobility Performances

Sensors ◽  
2021 ◽  
Vol 21 (20) ◽  
pp. 6854
Author(s):  
Aya Dernayka ◽  
Michel-Ange Amorim ◽  
Roger Leroux ◽  
Lucas Bogaert ◽  
René Farcy
Keyword(s):  
Everyday Life ◽  
Environmental Conditions ◽  
Tactile Feedback ◽  
Light Detection And Ranging ◽  
Blind People ◽  
Years Of Experience ◽  
Light Rain ◽  
Mobility Test ◽  
White Cane ◽  
Sun Light

We present a protocol for evaluating the efficiency of an electronic white cane for improving the mobility of blind people. The electronic cane used during the test is the Tom Pouce III, made of LIDAR sensors (light detection and ranging) with tactile feedback. The protocol comprises two parts. The first part, the “detection test”, evaluates the efficiency of the sensors in the Tom Pouce III for detecting the obstacles found in everyday life (thin and large poles, apertures) under different environmental conditions (darkness, sun light, rain). The second part of the test, the “mobility test”, compares the ability of blind participants to cross a 25 m path by avoiding obstacles with the simple white cane and the electronic cane. The 12 blind participants had between 2 and 20 years of experience of everyday usage of Tom Pouce devices. The results show a significant improvement in the capacity to avoid obstacles with the electronic cane relative to the simple white cane, and there was no speed difference. There was no correlation between the results and the years of experience of the users.

scholarly journals Chemical Functionalization of Carbon Nanotubes and its Effects on Electrical Conductivity

2014 ◽  
Vol 28 ◽  
pp. 51-61 ◽  
Author(s):  
José Encarnación Moreno Marcelino ◽  
Enrique Vigueras Santiago ◽  
Gustavo Lopez-Tellez ◽  
Susana Hernández López
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Electrical Conductivity ◽  
Functional Groups ◽  
Compression Technique ◽  
Chemical Functionalization ◽  
Mechanical Stirring ◽  
Chemically Modified ◽  
Functionalization Of Carbon Nanotubes ◽  
Microraman Spectroscopy

This work presents the study of the electrical conductivity in MWNT as a function of three different chemical functionalization conditions. Unmodified and chemically modified MWNT were characterized by microRaman spectroscopy, XPS and SEM whereas the electrical conductivity was determined by dust compression technique. MWNT were modified using three different oxidation conditions: (1) a mix of concentrated acids, H2SO4/HNO3 (3:1, v/v) sonicated for 2 h; (2) same mixture as (1) but using mechanical stirring for 6 h and (3) a reflux of an aqueous solution of HNO3 (20%, v/v) and mechanical stirring for 6 h. The characterization evidenced different functionalization degrees, based on the formation and detection of functional groups such as ether, carbonyl and carboxyl in different percentages. The unmodified CNT presented a conductivity of 510 S/m which decreased as the functionalization degree increased. For reactions (1) and (2) such conductivity was reduced by 8.8 and 15.5%, respectively, whereas for condition (3) it only decreased 0.98%.

Chemically modified glycosaminoglycan derivatives as building blocks for biomaterial coatings and hydrogels

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Matthias Schnabelrauch ◽  
Jürgen Schiller ◽  
Stephanie Möller ◽  
Dieter Scharnweber ◽  
Vera Hintze
Keyword(s):  
Extracellular Matrix ◽  
Tissue Regeneration ◽  
Building Blocks ◽  
Cellular Responses ◽  
Chemical Methods ◽  
Chemical Functionalization ◽  
Chemically Modified ◽  
Functional Biomaterials

Abstract Tissue regeneration is regulated by the cellular microenvironment, e.g. the extracellular matrix. Here, sulfated glycosaminoglycans (GAG), are of vital importance interacting with mediator proteins and influencing their biological activity. Hence, they are promising candidates for controlling tissue regeneration. This review addresses recent achievements regarding chemically modified GAG as well as collagen/GAG-based coatings and hydrogels including (i) chemical functionalization strategies for native GAG, (ii) GAG-based biomaterial strategies for controlling cellular responses, (iii) (bio)chemical methods for characterization and iv) protein interaction profiles and attained tissue regeneration in vitro and in vivo. The potential of GAG for bioinspired, functional biomaterials is highlighted.

Studies on the Preparation and Characterisation of Carbon Nanostructures

2004 ◽  
Vol 99-100 ◽  
pp. 269-272
Author(s):  
R.J. Kalenczuk ◽  
E. Borowiak-Palen ◽  
T. Pichler ◽  
M. Rümmeli ◽  
J. Fink
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Carbon Nanostructures ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Single Wall Carbon Nanotubes ◽  
Multiwalled Carbon ◽  
New Class ◽  
Chemically Modified ◽  
Transmission Electron

We present a study on the preparation of multiwalled carbon nanotubes (MWCNT) using chemical vapour deposition (CVD). The CVD produced MWCNT and single wall carbon nanotubes (SWCNT) produced with a laser ablation technique were then chemically modified by substituting carbon atoms with boron and nitrogen atoms. The morphology and the crystal structure of the new class of nanostructures were analyzed by means of scanning electron microscopy (SEM) and transmission electron microscopy (TEM).

scholarly journals Systematization of the Definition of «Soft Skills» in Domestic and Foreign Scientific Literature

2021 ◽  
Vol 20 (1) ◽  
pp. 156-163
Author(s):  
Svetlana N. Fomina ◽  
◽  
Konstantin A. Dobrynin ◽  
Irina G. Grigorieva ◽  
◽  
...  
Keyword(s):  
Emotional Intelligence ◽  
Everyday Life ◽  
Environmental Conditions ◽  
Scientific Literature ◽  
Soft Skills ◽  
Educational Community ◽  
High Demand ◽  
Global Trend ◽  
The World ◽  
Definition Of

Currently, the world educational community is actively discussing the problem of developing students’ universal competencies, flexible skills, or «soft skills». A global trend is indicated that requires young specialists to master the skills included in the definition of «soft skills», since a set of such skills and abilities allows you to effectively approach tasks and quickly adapt to changing environmental conditions. The application of these skills in everyday life is also actualized, which can help a person to be adaptive in changing conditions. Indicating the high demand and relevance of this issue, scientists note serious difficulties in using various approaches associated with the discrepancy and different use of the definitions of «soft skills». The purpose of this study was an attempt to systematize the concepts used and develop the author’s list of «soft skills», including: «creativity», «cooperation», «persuasion», «emotional intelligence», «adaptability».

scholarly journals ВЛАСТИВОСТІ SALMONELLA TYPHI ЗА ДІЇ ЕЛЕКТРОМАГНІТНОГО ВИПРОМІНЮВАННЯ НАДВИСОКОЇ ЧАСТОТИ

2016 ◽  
Vol 18 (3(71)) ◽  
pp. 205-208
Author(s):  
O.V. Yablonska ◽  
N.Y. Mekh ◽  
T.A. Duhnich
Keyword(s):  
Veterinary Medicine ◽  
Everyday Life ◽  
Environmental Conditions ◽  
High Frequency ◽  
Salmonella Typhi ◽  
Biological Properties ◽  
Microwave Energy ◽  
Microwave Oven ◽  
Enteric Disease ◽  
The Subject

In Ukraine, a role in the etiology of Salmonella enteric disease in humans and animals is important because there are changes in the structure of these pathogens serovariantic who skillfully adapted to the environmental conditions. Without studying the biological properties of pathogens, their accounting is impossible to predict the development of epidemiological and epizootic processes and to develop effective measures regarding the reduction of intestinal infections.Electromagnetic radiation of ultra–high frequency (UHF) is widely used in everyday life and medicine and more recently in veterinary medicine, and the effect of microwaves on the cells and the organism as a whole is the subject of scrutiny. Development of optimal microwave heating modes based on biophysical laws of microwave radiation with cells and the mechanism of absorption of microwave energy cell suspensions.Curing agar and broth cultures of Salmonella in the microwave destroys them after 30 seconds.Therefore, we believe that the electromagnetic radiation of the microwave oven when it is exposed for at least 30 seconds. It can be used for the destruction of enteropathogenic microorganisms in different substrates. 

Determining the impact of hydrofluoric acid on surface states of as-prepared and chemically modified Si nanocrystals

RSC Advances ◽  
2016 ◽  
Vol 6 (5) ◽  
pp. 3723-3728 ◽  
Author(s):  
B. V. Oliinyk ◽  
V. Lysenko ◽  
S. Alekseev
Keyword(s):  
Transport Properties ◽  
Electrical Transport ◽  
Hydrofluoric Acid ◽  
Surface States ◽  
Silicon Nanocrystal ◽  
Electrical Transport Properties ◽  
Chemical Functionalization ◽  
Chemically Modified ◽  
Si Nanocrystals ◽  
The Impact

The paper demonstrates an easy and cheap approach to chemical functionalization of silicon nanocrystal surface leading to enhancement of photoluminescence and electrical transport properties.

scholarly journals Computational Atomistic Modeling in Carbon Flatland and Other 2D Nanomaterials

2020 ◽  
Vol 10 (5) ◽  
pp. 1724 ◽  
Author(s):  
Aurélie Champagne ◽  
Samuel Dechamps ◽  
Simon M.-M. Dubois ◽  
Aurélien Lherbier ◽  
Viet-Hung Nguyen ◽  
...  
Keyword(s):  
Carbon Nanostructures ◽  
Density Functional ◽  
Tight Binding ◽  
Scanning Tunneling ◽  
Atomistic Modeling ◽  
Functional Theory ◽  
Simulation Tools ◽  
Atomic Force ◽  
2D Nanomaterials ◽  
The One

As in many countries, the rise of nanosciences in Belgium has been triggered in the eighties in the one hand, by the development of scanning tunneling and atomic force microscopes offering an unprecedented possibility to visualize and manipulate the atoms, and in the other hand, by the synthesis of nano-objects in particular carbon nanostructures such as fullerene and nanotubes. Concomitantly, the increasing calculating power and the emergence of computing facilities together with the development of DFT-based ab initio softwares have brought to nanosciences field powerful simulation tools to analyse and predict properties of nano-objects. Starting with 0D and 1D nanostructures, the floor is now occupied by the 2D materials with graphene being the bow of this 2D ship. In this review article, some specific examples of 2D systems has been chosen to illustrate how not only density functional theory (DFT) but also tight-binding (TB) techniques can be daily used to investigate theoretically the electronic, phononic, magnetic, and transport properties of these atomically thin layered materials.

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