scholarly journals A Review on the Synthesis, Characterization, and Modeling of Polymer Grafting

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 375
Author(s):  
Miguel Ángel Vega-Hernández ◽  
Gema Susana Cano-Díaz ◽  
Eduardo Vivaldo-Lima ◽  
Alberto Rosas-Aburto ◽  
Martín G. Hernández-Luna ◽  
...  
Keyword(s):  
Critical Review ◽  
Synthetic Polymers ◽  
Polymer Grafting ◽  
Comprehensive Overview ◽  
Good Level ◽  
Chemical Grafting ◽  
Different Types ◽  
Level Of Understanding

A critical review on the synthesis, characterization, and modeling of polymer grafting is presented. Although the motivation stemmed from grafting synthetic polymers onto lignocellulosic biopolymers, a comprehensive overview is also provided on the chemical grafting, characterization, and processing of grafted materials of different types, including synthetic backbones. Although polymer grafting has been studied for many decades—and so has the modeling of polymer branching and crosslinking for that matter, thereby reaching a good level of understanding in order to describe existing branching/crosslinking systems—polymer grafting has remained behind in modeling efforts. Areas of opportunity for further study are suggested within this review.

scholarly journals Nothing but hot air?—On the molecular ballistic analysis of backspatter generated by and the hazard potential of blank guns

2021 ◽  
Author(s):  
Jan Euteneuer ◽  
Annica Gosch ◽  
Cornelius Courts
Keyword(s):  
Correct Identification ◽  
Str Typing ◽  
Comprehensive Overview ◽  
Biological Investigation ◽  
Biological Targets ◽  
Hazard Potential ◽  
Hot Air ◽  
Different Types ◽  
Blank Cartridge ◽  
Blank Cartridges

AbstractBlank cartridge guns are prevalent especially in countries with laws restricting access to conventional firearms, and it is a common misconception that these weapons are harmless and only used as toys or for intimidation. However, although their harming potential is well-documented by numerous reports of accidents, suicides, and homicides, a systematic molecular biological investigation of traces generated by shots from blank cartridges at biological targets has not been done so far. Herein, we investigate the occurrence and analyzability of backspatter generated by shots of different types of blank cartridge guns firing different types of blank ammunition at ballistic gelatin model cubes doped with human blood and radiological contrast agent soaked into a spongious matrix and covered with three different variants of skin simulants. All skin simulants were penetrated, and backspatter was created in 100% of the shots in amounts sufficient for forensic short tandem repeat (STR) typing that resulted in the correct identification of the respective blood donor. Visible backspatter was documented on the muzzle and/or inside the barrel in all cases, and in 75% of cases also on the outer surfaces and on the shooter’s hand(s). Wound cavities were measured and ranged between 1 and 4.5 cm in depth. Discussing our findings, we provide recommendations for finding, recovering, and analyzing trace material from blank guns, and we demonstrate the considerable hazard potential of these devices, which is further emphasized by the presentation of a comprehensive overview of the pertinent literature on injuries inflicted by blank guns.

An Insight into the Polymeric Nanoparticles Applications in Diabetes Diagnosis and Treatment

2021 ◽  
Vol 21 ◽  
Author(s):  
Parisa Dehghani ◽  
Monireh Esameili Rad ◽  
Atefeh Zarepour ◽  
Ponnurengam Malliappan Sivakumar ◽  
Ali Zarrabi
Keyword(s):  
Polymeric Nanoparticles ◽  
Synthetic Polymers ◽  
Diagnostic Methods ◽  
Diagnosis And Treatment ◽  
Diabetes Diagnosis ◽  
Transport Mechanisms ◽  
Different Types ◽  
Treatment And Diagnosis ◽  
Insight Into

: Diabetes mellitus (DM) is a type of chronic metabolic disease that has affected millions of people worldwide and is known with a defect in the amount of insulin secretion, insulin functions, or both. This deficiency leads to an increase in the amounts of glucose, which could be accompanied by long-term damages to other organs such as eyes, kidneys, heart, and nervous system. Thus, introducing an appropriate approach for diagnosis and treatment of different types of DM is the aim of several researches. By the emergence of nanotechnology and its application in medicine, new approaches were presented for these purposes. The object of this review article is to introduce different types of polymeric nanoparticles (PNPs), as one of the most important classes of nanoparticles, for diabetic management. To achieve this goal, at first, some of the conventional therapeutic and diagnostic methods of DM will be reviewed. Then, different types of PNPs, in two forms of natural and synthetic polymers with different properties, as a new method for DM treatment and diagnosis will be introduced. In the next section, the transport mechanisms of these types of nano-carriers across the epithelium, via paracellular and transcellular pathways will be explained. Finally, the clinical use of PNPs in the treatment and diagnosis of DM will be summarized. Based on the results of this literature review, PNPs could be considered one of the most promising methods for DM management.

scholarly journals What Is Going on with Visual Attention in Reading and Dyslexia? A Critical Review of Recent Studies

2022 ◽  
Vol 12 (1) ◽  
pp. 87
Author(s):  
Conrad Perry ◽  
Heidi Long
Keyword(s):  
Visual Attention ◽  
Critical Review ◽  
Reading Ability ◽  
Reading Performance ◽  
Span Task ◽  
Causal Effects ◽  
Future Research ◽  
Different Types ◽  
Visual Tasks

This critical review examined current issues to do with the role of visual attention in reading. To do this, we searched for and reviewed 18 recent articles, including all that were found after 2019 and used a Latin alphabet. Inspection of these articles showed that the Visual Attention Span task was run a number of times in well-controlled studies and was typically a small but significant predictor of reading ability, even after potential covariation with phonological effects were accounted for. A number of other types of tasks were used to examine different aspects of visual attention, with differences between dyslexic readers and controls typically found. However, most of these studies did not adequately control for phonological effects, and of those that did, only very weak and non-significant results were found. Furthermore, in the smaller studies, separate within-group correlations between the tasks and reading performance were generally not provided, making causal effects of the manipulations difficult to ascertain. Overall, it seems reasonable to suggest that understanding how and why different types of visual tasks affect particular aspects of reading performance is an important area for future research.

Marketing's Role in the Implementation of Business Strategies: A Critical Review and Conceptual Framework

1987 ◽  
Vol 51 (3) ◽  
pp. 15-33 ◽  
Author(s):  
Orville C. Walker ◽  
Robert W. Ruekert
Keyword(s):  
Critical Review ◽  
Organizational Structures ◽  
Business Strategies ◽  
Theoretical Perspectives ◽  
Different Types ◽  
Marketing Activities ◽  
Overall Performance ◽  
Research Propositions ◽  
Relationship Of ◽  
The Relationship

The authors review and integrate various theoretical perspectives, normative statements, and pieces of empirical evidence about the organizational structures and processes best suited for implementing different types of business strategies. Particular emphasis is given to the relationship of different types of structure, processes, and policies involved in the performance of marketing activities to the overall performance of different business strategies. Several specific research propositions are developed.

scholarly journals Operability and Technical Implementation Issues Related to Heat Integration Measures—Interview Study at an Oil Refinery in Sweden

Energies ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3478 ◽  
Author(s):  
Sofie Marton ◽  
Elin Svensson ◽  
Simon Harvey
Keyword(s):  
Heat Exchanger ◽  
Heat Recovery ◽  
Early Stage ◽  
Oil Refinery ◽  
Practical Implementation ◽  
Heat Integration ◽  
Heat Exchanger Network ◽  
Comprehensive Overview ◽  
Relative Significance ◽  
Different Types

In many energy-intensive industrial process plants, significant improvements in energy efficiency can be achieved through increased heat recovery. However, retrofitting plants for heat integration purposes can affect process operability. The aim of this paper is to present a comprehensive overview of such issues by systematically relating different types of heat recovery retrofit measures to a range of technical barriers associated with process operability and practical implementation of the measures. The paper presents a new approach for this kind of study, which can be applied in the early-stage screening of heat integration retrofit measures. This approach accounts for the importance of a number of selected operability factors and their relative significance. The work was conducted in the form of a case study at a large oil refinery. Several conceptual heat exchanger network retrofit design proposals were prepared and discussed during semi-structured interviews with technical staff at the refinery. The results show that many operability and practical implementation factors, such as spatial limitations, pressure drops and non-energy benefits, influence the opportunities for implementation of different types of heat exchanger network retrofit measures. The results indicate that it is valuable to consider these factors at an early stage when designing candidate heat exchanger network retrofit measures. The interview-based approach developed in this work can be applied to other case studies for further confirmation of the results.

A critical review on automation of steering mechanism of load haul dump machine

2019 ◽  
Vol 234 (2) ◽  
pp. 160-182
Author(s):  
Sreeharsha Rowduru ◽  
Niranjan Kumar ◽  
Ajit Kumar
Keyword(s):  
Critical Review ◽  
Tracking Error ◽  
Steering System ◽  
Pictorial Representation ◽  
Research Gaps ◽  
Steering Mechanism ◽  
Different Types ◽  
Automatic Steering ◽  
Complete Automation ◽  
Future Work

This article presents a brief note on the evolution of steering mechanisms and more emphasized on articulated steering system of the load haul dump machine. In this respect, pictorial representation of the evolution of steering mechanisms for on-road and articulated steering mechanisms of the load haul dump machine is made from the available literature. Critical review on basic elements required for the complete automation of the load haul dump vehicle steering system is presented. Different types of controllers for path tracking error minimization of the scale-modeled or simulated model of the load haul dump steering system are tabulated. Few case studies stimulating the complete automation of the load haul dump steering system employed on the field are also discussed. Challenges and some research gaps in making fully automated steering system of the load haul dump machine are identified in this review article. At the end, based on the critical review, some novel methods for making the fully automated steering system of the load haul dump machine is provided, which is the potential future work for the design and development of feasible automatic steering system.

scholarly journals On the Use of Starch in Emulsion Polymerizations

Processes ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 140 ◽  
Author(s):  
Shidan Cummings ◽  
Yujie Zhang ◽  
Niels Smeets ◽  
Michael Cunningham ◽  
Marc Dubé
Keyword(s):  
Emulsion Polymerization ◽  
Critical Review ◽  
Synthetic Polymers ◽  
Industrial Research ◽  
Feeding Strategies ◽  
Characterization Methods ◽  
Water Based ◽  
Renewable Material ◽  
Emulsion Polymerizations

The substitution of petroleum-based synthetic polymers in latex formulations with sustainable and/or bio-based sources has increasingly been a focus of both academic and industrial research. Emulsion polymerization already provides a more sustainable way to produce polymers for coatings and adhesives, because it is a water-based process. It can be made even more attractive as a green alternative with the addition of starch, a renewable material that has proven to be extremely useful as a filler, stabilizer, property modifier and macromer. This work provides a critical review of attempts to modify and incorporate various types of starch in emulsion polymerizations. This review focusses on the method of initiation, grafting mechanisms, starch feeding strategies and the characterization methods. It provides a needed guide for those looking to modify starch in an emulsion polymerization to achieve a target grafting performance or to incorporate starch in latex formulations for the replacement of synthetic polymers.

Electrical Charge in Radon Daughter Deposition: A Critical Review

1988 ◽  
Vol 24 (1-4) ◽  
pp. 211-215 ◽  
Author(s):  
W.H. Marlow (INVITED)
Keyword(s):  
Indoor Air ◽  
Critical Review ◽  
Aerosol Particles ◽  
Decay Product ◽  
Cluster Ions ◽  
Physical Behaviour ◽  
Different Types ◽  
Radon Daughter ◽  
Critical Issues ◽  
Deposition Processes

Abstract The roles that electric charges play in the various deposition processes of radon daughter atoms has been a matter of conjecture for many years. In this review, several possible effects of charge are described. The sources of cluster ions in indoor air and their attachment to aerosol particles are then considered. Since the 'background' aerosol is central to the questions of deposition, its physical behaviour is discussed in the context of charge attachment and other properties. Data from experiments on decay product neutralisation during the first few seconds after birth, room air interactions from several different types of experiments, and deposition following inhalation are then reviewed. The interpretation of these experiments is given and directions for research needed better to identify critical issues are isolated.

Informed Consent Revisited

1996 ◽  
Vol 5 (2) ◽  
pp. 214-220 ◽  
Author(s):  
Amnon Goldworth
Keyword(s):  
Informed Consent ◽  
Medical Treatment ◽  
Clinical Setting ◽  
Relevant Information ◽  
Best Interests ◽  
Limited Capacity ◽  
Legal Requirement ◽  
Good Level ◽  
Level Of Understanding ◽  
The Way

More than three decades after its introduction as a legal requirement for medical treatment in the clinical setting, informed consent continues to be viewed with skepticism as to its need or effectiveness. Some maintain that it is not required because the ordinary individual believes that doctors can be trusted to behave In the best interests of their patients. This issue will be discussed in a later portion of this article. Others are persuaded that informed consent is an unattainable ideal given the limited capacity of the ordinary individual to understand the relevant information. This view is supported by studies intended to show that satisfactory understanding on the part of patients cannot be achieved. In rebuttal, Apple-baum, Lidz, and Meisel observed that:Such statements are easily refuted by reference to studies of situations in which reasonable comprehension actually has been achieved. A sounder interpretation of all these studies might be that patients and subjects can attain a good level of understanding in many cases, but that several factors — including the manner in which disclosure is made as well as patients' limitations — may get in the way.

scholarly journals MULTIPLE ACCESS TECHNIQUES FOR 5G NETWORKS

2020 ◽  
Vol 5 (2) ◽  
pp. 305-314
Author(s):  
Mrs. Rinkoo Bhatia
Keyword(s):  
Multiple Access ◽  
Heterogeneous Traffic ◽  
5G Networks ◽  
Comprehensive Overview ◽  
Fifth Generation ◽  
Power Domain ◽  
Different Types ◽  
Code Domain ◽  
Multiple Access Schemes ◽  
Multiple Domains

Fifth generation (5G) wireless networks face various challenges in order to support largescale heterogeneous traffic and users, therefore new modulation and multiple access (MA) schemes are being developed to meet the changing demands. As this research space is ever increasing, it becomes more important to analyze the various approaches, therefore, in this article we present a comprehensive overview of the most promising Multiple Access schemes for 5G networks. Our article focuses on various types of non-orthogonal multiple access (NOMA) techniques. Specifically, we first introduce different types of modulation schemes, potential for OMA. We then pay close attention to various types of NOMA candidates, including power-domain NOMA, code-domain NOMA, and NOMA multiplexing in multiple domains. From this exploration, we can identify the opportunities and challenges that will have the most significant impacts on modulation and MA designs for 5G networks.

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