scholarly journals Modified Nanoclays/Straw Fillers as Functional Additives of Natural Rubber Biocomposites

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 799
Author(s):  
Justyna Miedzianowska ◽  
Marcin Masłowski ◽  
Przemysław Rybiński ◽  
Krzysztof Strzelec
Keyword(s):  
Natural Rubber ◽  
Raw Materials ◽  
Research Work ◽  
Damping Properties ◽  
Main Research ◽  
Functional Additives ◽  
Different Types ◽  
Elastomeric Materials ◽  
Research Goal ◽  
The Impact

Increasingly, raw materials of natural origin are used as fillers in polymer composites. Such biocomposites have satisfactory properties. To ensure above-average functional properties, modifications of biofillers with other materials are also used. The presented research work aimed to produce and characterize elastomeric materials with a straw-based filler and four different types of montmorillonite. The main research goal was to obtain improved functional parameters of vulcanizates based on natural rubber. A series of composites filled with straw and certain types of modified and unmodified nano-clays in various ratios and amounts were prepared. Then, they were subjected to a series of tests to assess the impact of the hybrids used on the final product. It has been shown that the addition of optimal amounts of biofillers can, inter alia, increase the tensile strength of the composite, improve damping properties, extend the burning time of the material and affect the course of vulcanization or cross-linking density.

scholarly journals Fundamental Investigation for Processing of Pb-Cu-S-Bearing Materials

Metals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 74
Author(s):  
Christoph Zschiesche ◽  
Jürgen Antrekowitsch
Keyword(s):  
Oxygen Potential ◽  
Lead Concentration ◽  
Raw Materials ◽  
Research Work ◽  
Distribution Coefficients ◽  
Condensed Phases ◽  
Fundamental Investigation ◽  
Bearing Materials ◽  
The Right ◽  
The Impact

The processing of polymetallic materials provides some challenges to every flowsheet. Within Aurubis Cu-Pb-metallurgical flowsheet, a broad range of raw materials and intermediates are processed. Continuous improvements are required to adapt the flowsheet according to the changing material quantity and quality. Therefore, thermodynamic modeling is the desired and most efficient way to conduct scenario analysis. Hence, databases and software are becoming better and better as the acceptance of this method increased. Further understanding is promoted by conducting experimental test work to validate the calculated results. In this research work, the impact of various oxygen potential on the formation of the condensed phases’ slag, matte, speiss and crude lead were investigated. A frequent check of slag metallurgy, in particular, the iron and lead concentration, provide feedback if the metallurgical process is operating at the right oxygen potential. Following, the calculated distribution coefficients for Cu, Pb, As, Sb, Sn and Ni between matte/speiss and speiss/lead are discussed.

scholarly journals Properties of Chemically Modified (Selected Silanes) Lignocellulosic Filler and Its Application in Natural Rubber Biocomposites

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4163 ◽  
Author(s):  
Justyna Miedzianowska ◽  
Marcin Masłowski ◽  
Przemysław Rybiński ◽  
Krzysztof Strzelec
Keyword(s):  
Thermal Stability ◽  
Natural Rubber ◽  
Natural Fibers ◽  
Cereal Straw ◽  
Analysis Technique ◽  
Elastomeric Materials ◽  
Static Mechanical ◽  
Lignocellulosic Filler ◽  
Processing Properties ◽  
The Impact

This article concerns the functional properties of elastomeric composites reinforced with modified lignocellulosic material obtained from cereal straw. The aim of the research was to acquire new knowledge on the effectiveness of cereal straw modification methods in multifunctional properties, while reducing the flammability of newly designed elastomeric materials made of natural rubber. The article deals with investigating and explaining dependencies that affect the performance and processing properties of polymer biocomposites containing modified cereal straw. Three different silanes were used to modify the lignocellulosic filler: n-Propyltriethoxysilane, Vinyltriethoxysilane, and 3,3′-Tetrathiobis(propyl-triethoxysilane). The influence of the conducted modifications on the morphology and structure of straw particles was investigated using a scanning electron microscope, contact angle measurements, and thermogravimetric analysis technique. The increase in hydrophobicity and thermal stability of natural fibers was confirmed. In turn, the impact of silanization on the properties of filled composites was determined on the basis of rheometric characteristics and cross-linking density, static mechanical properties, tear resistance, thermal stability, and flammability tests. Noteworthy was the improvement of the mechanical strength of biocomposites and their resistance to burning. Correlations affecting the structure, morphology, dispersion, and properties of produced composites can facilitate the indication of a further research path in the field of development of new elastomeric biomaterials.

scholarly journals Properties of Graphene Oxide/Epoxy Resin Composites

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Jijun Tang ◽  
Haijun Zhou ◽  
Yunxia Liang ◽  
Xinlan Shi ◽  
Xin Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Epoxy Resin ◽  
Raw Materials ◽  
Damping Capacity ◽  
Resin Composites ◽  
Damping Properties ◽  
Natural Graphite ◽  
Epoxy Resin Composites ◽  
The Impact ◽  
Properties Of Composites

The graphene oxide (GO) was obtained by pressurized oxidation method using natural graphite as raw materials. Then the GO/epoxy resin composites were prepared by casting. The mechanical and damping properties of composites were studied. As a result, the impact intensity of GO/epoxy resin composites was prominently improved with the content of the graphene oxide increasing. The glass transition temperature decreased and the damping capacity is improved.

scholarly journals The Decade 1989–1998 in Spanish Psychology: An Analysis of Research in Basic Psychological Processes, History of Psychology, and Other Related Topics

2001 ◽  
Vol 4 (2) ◽  
pp. 123-150
Author(s):  
José Manuel Igoa
Keyword(s):  
Research Work ◽  
Research Trends ◽  
Faculty Members ◽  
Psychological Processes ◽  
Applied Psychology ◽  
Main Research ◽  
Research Areas ◽  
History Of ◽  
Spanish Universities ◽  
The Impact

This article presents a review of research published by Spanish Faculty from the area of basic psychology in the decade 1989-1998. It provides information about research on basic psychological processes commonly studied under the labels ofexperimentalandcognitivepsychology, plus a number of topics from other research areas, including some applied psychology issues. The review analyzes the work of 241 faculty members from 27 different Spanish universities, as reflected in 1,882 published papers, book chapters, and books. The analyses carried out in this report include a description of the main research trends found in each area, with some representative references of the published materials, and statistics showing the distribution of this research work in various relevant publications (both Spanish and foreign), with figures that reveal the impact of this work both at a national and international scale.

SIFAT FISIK DAN MEKANIK PAPAN PARTIKEL DARI LIMBAH PLASTIK JENIS HDPE (High Density Polyetylene) DAN RANTING/CABANG KARET (Hevea brasiliensis Muell.Arg)

2011 ◽  
Vol 3 (1) ◽  
pp. 7
Author(s):  
Sari Mirad Noor
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Raw Materials ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Plastic Waste ◽  
High Density ◽  
Different Types ◽  
Materials Used ◽  
The Impact

The need of log increace rapidly, mean while forest product decrease, so efficiency on wood process should be done wisely, in the other hand plastic waste is uncompossed material, become an environmental problems. This research aims to determine the impact of particles of type HDPE plastic wastes and twigs/branches of rubber on some physical and mechanical properties of wood. Physical properties have been tested for water content, density, thickness, and water absorption. Although mechanical properties tests were tough Broken/Module of Rufture (MOR) and the preservation of architecture/modulus of elasticity (MOE).     The raw materials used are polyethylene of high density of waste plastic and rubber adhesive urea formaldehyde branch branch. Experimental design used the randomized Completely Design (RCD) 5 x 4, in which each treatment became much like 5 times replicated).The treatment used is the diversity of the composition of the waste of plastic of different types of polyethylene of high density provides a significant effect on the content of water, water absorption, the density and the development of thickness. With regard to the persistence and the fracture of the arch determination not to give a significant effect.Keywords: physical and mechanical properties, particle board, HDPE plastic waste, branch/twig of  rubber.

scholarly journals Implementation of Halal Product Assurance in the Pharmaceutical Sector in Indonesia

2021 ◽  
Vol 1 (3) ◽  
Author(s):  
Resti Dian Luthviati ◽  
Suviwat Jenvitchuwong
Keyword(s):  
Value Chain ◽  
Raw Materials ◽  
Production Costs ◽  
Pharmaceutical Sector ◽  
Total Change ◽  
Drug Prices ◽  
Different Types ◽  
Distribution Process ◽  
The Impact ◽  
Economic Capacity

The goal of this research is to determine and assess the implementation of halal certification for the pharmaceutical business in accordance with Law Number 33 of 2014 on Halal Product Assurance, as well as the variables that hinder and support its implementation. The impact of the JPH Law on the process value chain and supply chain of drugs and vaccines results in a total change in the pharmaceutical industry, including changes in ingredients resulting in reprocessing of quality, safety, and efficacy, changes in the distribution process, addition of personnel or staff, decreased economic capacity of the industry due to increased production costs, and there is a decrease in the industry's economic capacity due to increased costs of production. The halal status of a product has become a must-have for all consumers, particularly Muslims. Some parties, particularly the pharmaceutical business, continue to oppose to the existence of Law No. 33 of 2014 concerning Halal Product Guarantee. The supply of special facilities, such as rooms, equipment, and human resources, will significantly raise costs, resulting in higher drug prices and a reduction in people's access to the items they truly require for health care. Currently, the pharmaceutical sector must import 95 percent or more of its raw materials, totaling 150,000 items, in order to make about 30,000 different types of pharmaceuticals in the country.

scholarly journals MSMEs IN TIMES OF CRISIS. EVIDENCE FROM INDONESIA

2020 ◽  
Vol 5 (2) ◽  
pp. 91
Author(s):  
Tulus Tambunan
Keyword(s):  
Financial Crisis ◽  
Global Financial Crisis ◽  
Raw Materials ◽  
Small And Medium Enterprises ◽  
Asian Financial Crisis ◽  
The Past ◽  
Transmission Channels ◽  
Different Types ◽  
Medium Enterprises ◽  
The Impact

This descriptive study is about micro, small and medium enterprises (MSMEs) in Indonesia. It has two objectives: (i) to estimate the impact of the Covid 19 crisis on MSMEs and compares it with other previous problems. Second, to explore crisis mitigation (CM) measures adopted by affected MSMEs. It shows that different types of crises have different transmission channels through which such situations affected MSMEs. CM measures adopted by affected MSMEs also vary by different types of emergencies and hence various business risks. In the 1997/98 crisis, replacing imported raw materials with local raw materials was widely adopted. The 2008/09 problem was finding new customers or markets in unaffected countries or switching to the domestic market. While in the case of the Covid-19 crisis, switching temporarily to manufacturing medical devices such as masks and changing the marketing system from conventional to e-commerce are the most widely adopted strategies. There is already a lot of literature on economic crises such as the 1997/98 Asian financial crisis and the 2008 global economic crisis. The Covid 19 pandemic's reports and articles impact on the economy have emerged in the past two months. To the best of the author's knowledge, this is the first study on how such crises affected and through what transmission channels, MSMEs. Keywords: MSMEs, 1997/98 Asian Financial Crisis, 2008/09 Global Financial Crisis, COVID-19 Crisis, CM MeasuresJEL Classification: D2, F6, G01, I1

scholarly journals A Prediction of Different Technologies for the Development of Unstructured Big Data

2020 ◽  
Vol 9 (3) ◽  
pp. 2589-2595
Keyword(s):  
Big Data ◽  
New Technologies ◽  
Research Work ◽  
Massive Data ◽  
Research Issues ◽  
Open Research ◽  
Different Types ◽  
Multiple Levels ◽  
The Impact ◽  
Accuracy Performance

Nowadays, a huge volume of terabytes of data is generated from digital technologies and modern information systems, namely Internet of Things and cloud computing. The extraction of knowledge for making decisions from the analysis of these massive data, leads to requires a huge effort at multiple levels. Hence, the researchers focused on Big Data Analysis (BDA) for better development. Traditional platforms and data techniques are very less efficient in Big Data (BD) context, which shows the lack of accuracy, performance, scalability and slow responsiveness. Several works are carried out to address the complex BD challenges by developing new technologies and different types of distributions. In this research work, various technologies which are developed for BD are described and the impact of open research issues, challenges and tools for processing the BD are discussed. Then, the impacts on key business performances for BD are evaluated. At last, this work presented the four major technical and managerial challenges, which provides a platform for exploring BD at numerous stages

Exploring the interrelationship between quality, safety and HR within crisis management framework

2019 ◽  
Vol 31 (4) ◽  
pp. 541-562 ◽  
Author(s):  
Christina Nizamidou ◽  
Fotis Vouzas ◽  
Katerina Gotzamani
Keyword(s):  
Statistical Analysis ◽  
Literature Review ◽  
Crisis Management ◽  
Research Work ◽  
Added Value ◽  
Top Management ◽  
Content Type ◽  
Main Research ◽  
The Impact

Purpose The purpose of the paper is twofold: first, to examine the interaction of quality, safety and crisis management (CM), and second, to explore the role played by an HR department in terms of CM. Design/methodology/approach This paper consists of two parts: theoretical and empirical. The theoretical part follows the approach of an extended literature review. The empirical part illustrates the statistical analysis of the obtained data from Greek organizations that employ the largest number of employees, regardless of their business sector. Findings The statistical analysis allowed the authors to confirm their main research hypotheses. First, it showed the interrelationship that exists between safety, quality and CM. Second, it presented the impact of this relationship on human resources and the vital role of HR department, in case of a crisis. Practical implications Organizations and their top management can review and redesign their CM procedures according to the findings of this survey, aiming a fast recovery and a return to normalcy. Originality/value Based on the literature review, there has been a little research work on the interrelationship between safety, quality and the level of CM familiarity and the role of HR department at the times of crisis. The added value of attaining this goal may become a motivational element for any organization and its top management to continue investing more in safety, quality and CM issues.

Upgrading of wastewater treatment plants equipped with rotating biological contactors to nitrification and P removal

2000 ◽  
Vol 41 (1) ◽  
pp. 145-153 ◽  
Author(s):  
O. Nowak
Keyword(s):  
Wastewater Treatment ◽  
Oxygen Concentration ◽  
Phosphorus Removal ◽  
Wastewater Treatment Plants ◽  
Research Work ◽  
Design Parameters ◽  
Different Types ◽  
Rotating Biological Contactors ◽  
The Impact ◽  
P Removal

In the course of a research project on the further use of treatment plants with rotating biological contactors for nitrification and phosphorus removal, full-scale investigations were carried out. From the results design parameters for phosphorus pre-precipitation as well as for secondary and tertiary nitrifying RBCs were derived. Regarding the impact of the oxygen concentration, the alkalinity and the pH, respectively, on nitrifying biofilms, former research work could mostly be confirmed. Concepts for the upgrading of different types of RBC plants are discussed - including cost estimations.

Sign in / Sign up

Export Citation Format

Share Document