scholarly journals Hyperelastic Bone Involving the Washer Method

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Kristin Jones ◽  
Keyword(s):  
3D Printing ◽  
Material Science ◽  
Medical Equipment ◽  
Cost Comparison ◽  
Modern Material ◽  
The Creation ◽  
The Cost ◽  
Modern Material Science

The research conducted focuses on 3D printing and its application in medical equipment. A recent breakthrough in modern material science was made with the creation of hyperelastic bone. This exploration looks at how hyperelastic bone is created, the cost comparison to older tools, and the possible design for hyperelastic bone. Detailed calculations and descriptions are also included to explain the reasoning behind the work conducted.

Antimicrobial Activities of Metal Containing Compounds and Hybrids

2020 ◽  
Vol 26 (45) ◽  
pp. 5881-5891
Author(s):  
Tahseen Kamal ◽  
Sher Bahadar Khan ◽  
Abdullah M. Asiri
Keyword(s):  
Growth Inhibition ◽  
Mode Of Action ◽  
Material Science ◽  
Antimicrobial Activities ◽  
Excellent Performance ◽  
Modern Material ◽  
Modern Material Science

Normally, antibiotics are used for the growth inhibition of a variety of pathogens. The ever- increasing resistance of the various disease-causing pathogens to the antibiotics has drawn tremendous attention of researchers to find efficient alternatives. The recent era of modern material science and nanotechnology has made it possible to replace the existing antibiotics up to some extent. Currently, a vast library of materials has been prepared, which shows excellent performance against pathogens. Such materials consist of certain metals. Through this review, we present some notable studies concerning the antimicrobial activities of various metal containing compounds and their mode of action.

scholarly journals Emerging functional materials based on chemically designed molecular recognition

BMC Materials ◽  
2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Wei Chen ◽  
Xiaohua Tian ◽  
Wenbo He ◽  
Jianwei Li ◽  
Yonghai Feng ◽  
...  
Keyword(s):  
Molecular Recognition ◽  
Material Science ◽  
Rational Design ◽  
Dynamic Properties ◽  
Functional Materials ◽  
Molecular Assembly ◽  
Modern Material ◽  
Chemical Recognition ◽  
Fundamental Research ◽  
Modern Material Science

AbstractThe specific interactions responsible for molecular recognition play a crucial role in the fundamental functions of biological systems. Mimicking these interactions remains one of the overriding challenges for advances in both fundamental research in biochemistry and applications in material science. However, current molecular recognition systems based on host–guest supramolecular chemistry rely on familiar platforms (e.g., cyclodextrins, crown ethers, cucurbiturils, calixarenes, etc.) for orienting functionality. These platforms limit the opportunity for diversification of function, especially considering the vast demands in modern material science. Rational design of novel receptor-like systems for both biological and chemical recognition is important for the development of diverse functional materials. In this review, we focus on recent progress in chemically designed molecular recognition and their applications in material science. After a brief introduction to representative strategies, we describe selected advances in these emerging fields. The developed functional materials with dynamic properties including molecular assembly, enzyme-like and bio-recognition abilities are highlighted. We have also selected materials with dynamic properties in contract to traditional supramolecular host–guest systems. Finally, the current limitations and some future trends of these systems are discussed.

scholarly journals Case Study of Polyvinylidene Fluoride Doping by Carbon Nanotubes

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1428
Author(s):  
Pavel Kaspar ◽  
Dinara Sobola ◽  
Klára Částková ◽  
Rashid Dallaev ◽  
Eva Šťastná ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Material Science ◽  
Polyvinylidene Fluoride ◽  
Fiber Composites ◽  
Point Of View ◽  
Modern Material ◽  
Fluoride Fiber ◽  
Fluoride Doping ◽  
Modern Material Science

Modern material science often makes use of polyvinylidene fluoride thin films because of various properties, like a high thermal and chemical stability, or a ferroelectric, pyroelectric and piezoelectric activity. Fibers of this polymer material are, on the other hand, much less explored due to various issues presented by the fibrous form. By introducing carbon nanotubes via electrospinning, it is possible to affect the chemical and electrical properties of the resulting composite. In the case of this paper, the focus was on the further improvement of interesting polyvinylidene fluoride properties by incorporating carbon nanotubes, such as changing the concentration of crystalline phases and the resulting increase of the dielectric constant and conductivity. These changes in properties have been explored by several methods that focused on a structural, chemical and electrical point of view. The resulting obtained data have been documented to create a basis for further research and to increase the overall understanding of the properties and usability of polyvinylidene fluoride fiber composites.

PROMOTING THE NATURAL RESTORATION OF LIPNYAKS OF THE KASMARSKY DISTRICT FORESTRY OF THE ZIANCHURINSKY FORESTRY

2020 ◽  
Vol 37 (3) ◽  
pp. 76-82
Author(s):  
L.V. Mazitova ◽  
Keyword(s):  
Economic Efficiency ◽  
Natural Regeneration ◽  
Forest Area ◽  
Natural Restoration ◽  
The Creation ◽  
The Cost

The article presents the results of studying various measures to promote the natural renewal of lime forests in the Kasmarsky uchastkovoye forestry of the Zianchurinsky forestry. The data on lime forests within the boundaries of the forestry were studied, and the calculation of the economic efficiency of promoting natural regeneration was carried out. The use of evenly-gradual and continuous narrow-cut logging in the conditions of the Zianchurinsky forest area in the Kasmar district forest area will avoid the creation of expensive forest crops. The cost of creating forest crops is 10,719. 4 rubles per 1 ha, and the cost of preserving and caring for the forest during evenly-gradual logging is 4,237. 9 rubles, and solid narrow-cutting-3,469. 33 rubles.

scholarly journals Foundation Piles—A New Feature for Concrete 3D Printers

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2545
Author(s):  
Marcin Hoffmann ◽  
Krzysztof Żarkiewicz ◽  
Adam Zieliński ◽  
Szymon Skibicki ◽  
Łukasz Marchewka
Keyword(s):  
3D Printing ◽  
Rapid Development ◽  
Construction Materials ◽  
Shallow Foundation ◽  
Soil Reinforcement ◽  
3D Printer ◽  
Permanent Formwork ◽  
3D Printers ◽  
New Feature ◽  
The Cost

Foundation piles that are made by concrete 3D printers constitute a new alternative way of founding buildings constructed using incremental technology. We are currently observing very rapid development of incremental technology for the construction industry. The systems that are used for 3D printing with the application of construction materials make it possible to form permanent formwork for strip foundations, construct load-bearing walls and partition walls, and prefabricate elements, such as stairs, lintels, and ceilings. 3D printing systems do not offer soil reinforcement by making piles. The paper presents the possibility of making concrete foundation piles in laboratory conditions using a concrete 3D printer. The paper shows the tools and procedure for pile pumping. An experiment for measuring pile bearing capacity is described and an example of a pile deployment model under a foundation is described. The results of the tests and analytical calculations have shown that the displacement piles demonstrate less settlement when compared to the analysed shallow foundation. The authors indicate that it is possible to replace the shallow foundation with a series of piles combined with a printed wall without locally widening it. This type of foundation can be used for the foundation of low-rise buildings, such as detached houses. Estimated calculations have shown that the possibility of making foundation piles by a 3D printer will reduce the cost of making foundations by shortening the time of execution of works and reducing the consumption of construction materials.

The Legitimate Regulatory Distinction Test: Incomplete and Inadequate for the Particular Purposes of the TBT Agreement

2016 ◽  
Vol 15 (4) ◽  
pp. 543-562 ◽  
Author(s):  
JASON HOUSTON-MCMILLAN
Keyword(s):  
Dispute Settlement ◽  
Technical Barriers To Trade ◽  
Dispute Settlement Mechanism ◽  
Appellate Body ◽  
The Creation ◽  
The Cost ◽  
Special Circumstances ◽  
Settlement Mechanism

AbstractPrior to 2011, the Agreement on Technical Barriers to Trade had been somewhat neglected as a dispute-settlement mechanism, due in part to the lack of previous interpretation of the Agreement by WTO DSB Panels. In 2012, the Appellate Body adjudicated on three TBT disputes:US–Clove Cigarettes, US–Tuna II, andUS–COOL, aiming to officially interpret and clarify Articles 2.1 and 2.2 of the Agreement by creating a distinct test for a measure's consistency with these Articles. This paper explores the relevant decisions of both the Panel and Appellate Body in the three disputes which led to the creation of the ‘legitimate regulatory distinction’ test. The substance behind this phrase, placed in context, is dissected along with the associated idea of ‘even-handedness’. The test attempts to simplify future interpretations regarding what will constitute unjustifiable discrimination, but at the cost of the necessary distinction between the GATT and the TBT Agreement being blurred. The result is a test which is incomplete and which fails to take account of the special circumstances surrounding the TBT Agreement.

PLANNING OF LOGISTICS SUPPORT FOR THE DISPOSAL OF HOUSEHOLD E-WASTE

2021 ◽  
Vol 1 (9) ◽  
pp. 79-84
Author(s):  
NGUYEN THI THU HUONG ◽  
◽  
O. N. LARIN ◽  
◽  
Keyword(s):  
Supply Chain ◽  
Cost Effectiveness ◽  
Garbage Collection ◽  
Electronic Waste ◽  
Waste Collection ◽  
Official Statistics ◽  
Factors Associated ◽  
The Creation ◽  
The Cost

The article describes the factors associated with the planning of logistics support for the disposal of household electronic waste. Identifying these factors plays an important role in coordinating to ensure the cost-effectiveness of the costs of recycling e-waste at all stages of the supply chain from the source of waste to where it is accumulated and then recycled. The article describes the importance of such processes as: the development of a method for determining the volume of household electronic waste generated in the administrative-territorial district, the creation of a network of waste collection points, the determination of the amount and throughput of waste collection points, the need to organize garbage collection from the place of collection at the lowest cost. The study was conducted on the basis of an analysis of official statistics from the five most populous cities in Vietnam and thirty regions of Hanoi.

scholarly journals Closest and long-term prospects of 3D-printing for obstetrics and gynecology

2021 ◽  
Vol 20 (1) ◽  
pp. 76-81
Author(s):  
E. V. Kudryavtseva ◽  
V. V. Kovalev ◽  
E. S. Zakurinova ◽  
G. Muller-Kamskii ◽  
V. V. Popov
Keyword(s):  
3D Printing ◽  
Scientific Literature ◽  
Simulation Models ◽  
Surgical Instruments ◽  
Obstetrics And Gynecology ◽  
Scientific Review ◽  
Advantages And Disadvantages ◽  
The Creation ◽  
Dimensional Printing

Introduction. Despite the notable and rapid progress in the development of medical 3D printing in recent years, not much is known about the use of this technology in obstetrics and gynecology.The purpose of our review of scientific literature was to determine the current level of 3D printing development, discuss the closest and long term prospects for using this technology in obstetrics and gynecology, and analyze its potential advantages and disadvantages.Materials and methods. We searched for scientific literature. 378 papers passed a three-step screening, as a result of which 42 sources were selected for the final scientific review.Results and discussion. The main areas in which dimensional printing can be used in this area of medicine is the creation of simulation models and training for students, the creation of anatomical models for preoperative preparation, the surgical instruments, the creation of new dosage drug forms (including transvaginal ones), and bioprinting of organs and tissues.Conclusion. The presented literary review allows us to conclude that 3D printing the obstetrics and gynecology is a current rapidly developing direction. The organization of 3D modeling and printing laboratories can significantly increase the efficiency of teaching students and residents. In addition, obstetricians-gynecologists and surgeons should be informed about the possibility of 3D printing surgical instruments according to an individual design. It can inspire them to implement their own ideas and develop domestic innovative developments. Three-dimensional printing of dosage forms and bioprostheses requires more complex technological solutions, and is not yet used in clinical practice. However, given the enormous prospects for these areas, various grants should be envisaged for their development in Russia

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