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Article ; Online: Promoting research in primary care.

Lau, K T

2019 Volume 226, Issue 8, Page(s) 540

MeSH term(s)	Health Promotion ; Primary Health Care
Language	English
Publishing date	2019-04-27
Publishing country	England
Document type	Letter
ZDB-ID	218090-x
ISSN	1476-5373 ; 0007-0610
ISSN (online)	1476-5373
ISSN	0007-0610
DOI	10.1038/s41415-019-0285-8
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Ul III Zs.143: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular ab Jg. 2022: Lesesaal (EG)
Zs.MO 447: Show issues

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Article ; Online: Dynamical mechanical analysis of multiwall carbon nanotubes-styrene-isoprene-styrene block copolymer nanocomposite

Chipara, M. / Artiaga, R. / Lau, K.T. / Chipara, D.M. / Hui, D.

Composites Communications. 2017,

2017

Abstract: DMA investigations on polystyrene-block-polyisoprene-block-polystyrene three block copolymer containing with 17%wt. styrene, loaded by various amounts of multiwall carbon nanotubes are reported. The wrapping of the soft phase around the nanofiller is ... ...

Abstract	DMA investigations on polystyrene-block-polyisoprene-block-polystyrene three block copolymer containing with 17%wt. styrene, loaded by various amounts of multiwall carbon nanotubes are reported. The wrapping of the soft phase around the nanofiller is demonstrated through the splitting of the glass transition assigned to the soft phase. The nanofiller has a weaker effect on the hard phase (polystyrene) of the block copolymer and did not destroy completely the self-assembly features of the block copolymer as the order to disorder transition was still observed in all investigated nanocomposites. A model for the morphology of this nanocomposites is suggested.
Keywords	Dynamical Mechanical Analysis ; block copolymer ; multi wall carbon nanotube ; glass transition splitting ; self-assembly
Language	English
Publishing place	Elsevier Ltd
Document type	Article ; Online
Note	Pre-press version
ISSN	2452-2139
DOI	10.1016/j.coco.2017.01.001
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: A sleep bruxism detection system based on sensors in a splint - pilot clinical data.

McAuliffe, P / Kim, J H / Diamond, D / Lau, K T / O'Connell, B C

Journal of oral rehabilitation

2015 Volume 42, Issue 1, Page(s) 34–39

Abstract: It is difficult in a dental setting to accurately diagnose sleep bruxism and to objectively assess the severity, frequency or natural history of the condition in an individual patient. Yet this information is essential for the management of sleep bruxism ...

Abstract	It is difficult in a dental setting to accurately diagnose sleep bruxism and to objectively assess the severity, frequency or natural history of the condition in an individual patient. Yet this information is essential for the management of sleep bruxism and to plan appropriate dental treatment. The objective of this study was to clinically test a device that could be used to record bruxism events in a home environment. Pressure sensors were developed for use under the surface of an occlusal splint, and circuitry was designed to facilitate the recording and wireless transmission of the pressure sensor signal to a computer. Controlled mandibular movements were carried out in vivo to simulate bruxism and non-bruxism patterns. These patterns of force application were graphically presented to two examiners who were asked to identify the type of activity represented by the force curves. Examiners were largely able to distinguish bruxism from non-bruxism activity; the sensitivity ranged from 80% to 100% and the specificity from 75% to 100%. Using sensors in an occlusal splint, it is possible to recognise the typical tooth contact patterns seen in sleep bruxism. Such a device may be useful for monitoring sleep bruxism over an extended period at home.
MeSH term(s)	Bite Force ; Humans ; Occlusal Splints ; Pilot Projects ; Polysomnography/instrumentation ; Sensitivity and Specificity ; Sleep Bruxism/diagnosis
Language	English
Publishing date	2015-01
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	187079-8
ISSN	1365-2842 ; 0305-182X
ISSN (online)	1365-2842
ISSN	0305-182X
DOI	10.1111/joor.12223
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Article: Extraction and processing of real time strain of embedded FBG sensors using a fixed filter FBG circuit and an artificial neural network

Kahandawa, Gayan C / Epaarachchi, Jayantha / Wang, Hao / Canning, John / Lau, K.T

Measurement. 2013 Dec., v. 46, no. 10

2013

Abstract: Fibre Bragg Grating (FBG) sensors have been used in the development of structural health monitoring (SHM) and damage detection systems for advanced composite structures over several decades. Unfortunately, to date only a handful of appropriate ... ...

Abstract	Fibre Bragg Grating (FBG) sensors have been used in the development of structural health monitoring (SHM) and damage detection systems for advanced composite structures over several decades. Unfortunately, to date only a handful of appropriate configurations and algorithm sare available for using in SHM systems have been developed. This paper reveals a novel configuration of FBG sensors to acquire strain reading and an integrated statistical approach to analyse data in real time. The proposed configuration has proven its capability to overcome practical constraints and the engineering challenges associated with FBG-based SHM systems. A fixed filter decoding system and an integrated artificial neural network algorithm for extracting strain from embedded FBG sensor were proposed and experimentally proved. Furthermore, the laboratory level experimental data was used to verify the accuracy of the system and it was found that the error levels were less than 0.3% in predictions. The developed SMH system using this technology has been submitted to US patent office and will be available for use of aerospace applications in due course.
Keywords	algorithms ; engineering ; monitoring ; neural networks ; prediction ; United States
Language	English
Dates of publication	2013-12
Size	p. 4045-4051.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2000550-7
ISSN	0263-2241
ISSN	0263-2241
DOI	10.1016/j.measurement.2013.07.029
Database	NAL-Catalogue (AGRICOLA)

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Article: Tensile properties of chemically treated hemp fibres as reinforcement for composites

Kabir, M.M / Wang, H / Lau, K.T / Cardona, F

Composites. 2013 Oct., v. 53

2013

Abstract: Natural fibres, unlike synthetic fibres fabricated in-house, grow naturally. Their geometrical and physical properties are highly affected by environmental issues such as climate change. For instance, inconsistent cross-sectional areas and shapes along ... ...

Abstract	Natural fibres, unlike synthetic fibres fabricated in-house, grow naturally. Their geometrical and physical properties are highly affected by environmental issues such as climate change. For instance, inconsistent cross-sectional areas and shapes along the length of a natural fibre can result from environmental changes. These irregularities in natural fibres affect the ultimate load that can be carried by these fibres in structural engineering applications. In this study, the tensile properties of single hemp fibres were measured by taking into account, the variations in fibre diameters. Alkali, acetyl and silane treatments of fibres were carried out to obtain a better surface finish. The treatment effects on the fibres with respect to tensile properties were discussed. The relationship between tensile properties of treated fibres and the variation of their diameters was also studied. It was found that the tensile strength of chemically-treated fibres was lower than that of untreated fibres.
Keywords	climate change ; engineering ; hemp ; physical properties ; synthetic fibers ; tensile strength
Language	English
Dates of publication	2013-10
Size	p. 362-368.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2012385-1
ISSN	1879-1069 ; 1359-8368
ISSN (online)	1879-1069
ISSN	1359-8368
DOI	10.1016/j.compositesb.2013.05.048
Database	NAL-Catalogue (AGRICOLA)

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Article: Chemical treatments on plant-based natural fibre reinforced polymer composites: An overview

Kabir, M.M / Wang, H / Lau, K.T / Cardona, F

Composites. 2012 Oct., v. 43, no. 7

2012

Abstract: This paper provides a comprehensive overview on different surface treatments applied to natural fibres for advanced composites applications. In practice, the major drawbacks of using natural fibres are their high degree of moisture absorption and poor ... ...

Abstract	This paper provides a comprehensive overview on different surface treatments applied to natural fibres for advanced composites applications. In practice, the major drawbacks of using natural fibres are their high degree of moisture absorption and poor dimensional stability. The primary objective of surface treatments on natural fibres is to maximize the bonding strength so as the stress transferability in the composites. The overall mechanical properties of natural fibre reinforced polymer composites are highly dependent on the morphology, aspect ratio, hydrophilic tendency and dimensional stability of the fibres used. The effects of different chemical treatments on cellulosic fibres that are used as reinforcements for thermoset and thermoplastics are studied. The chemical sources for the treatments include alkali, silane, acetylation, benzoylation, acrylation and acrylonitrile grafting, maleated coupling agents, permanganate, peroxide, isocyanate, stearic acid, sodium chlorite, triazine, fatty acid derivate (oleoyl chloride) and fungal. The significance of chemically-treated natural fibres is seen through the improvement of mechanical strength and dimensional stability of resultant composites as compared with a pristine sample.
Keywords	absorption ; acetylation ; cellulosic fibers ; dimensional stability ; fungi ; hydrophilicity ; mechanical properties ; natural fibers ; polymers ; sodium ; stearic acid ; thermoplastics ; triazines
Language	English
Dates of publication	2012-10
Size	p. 2883-2892.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2012385-1
ISSN	1879-1069 ; 1359-8368
ISSN (online)	1879-1069
ISSN	1359-8368
DOI	10.1016/j.compositesb.2012.04.053
Database	NAL-Catalogue (AGRICOLA)

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Article: Mechanical properties of chemically-treated hemp fibre reinforced sandwich composites

Kabir, M.M / Wang, H / Lau, K.T / Cardona, F / Aravinthan, T

Composites. 2012 Mar., v. 43, no. 2

2012

Abstract: In this study, hemp fabrics were used as reinforcements with polyester resin to form composite skins while short hemp fibres with polyester as a core for making composite sandwich structures. To improve the fibre matrix adhesion properties, alkalisation, ...

Abstract	In this study, hemp fabrics were used as reinforcements with polyester resin to form composite skins while short hemp fibres with polyester as a core for making composite sandwich structures. To improve the fibre matrix adhesion properties, alkalisation, silane and acetylation treatments on the fibres surface were carried out. Examinations through fourier transform infrared (FTIR) spectroscopy, scanning electron microscope (SEM), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were conducted to investigate the physical and thermal properties of the fibres. Mechanical properties such as flexural and compressive strengths of the sandwich structures made by treated and untreated hemp fibres were studied. Based on the results obtained from the experiments, it was found that the fibre treated with alkalic solution and post-soaked by 8% NaOH exhibited better mechanical strength as compared with other treated and untreated fibre composite samples. Besides, DSC and TGA analysis showed that the thermal stability of all treated fibre was enhanced as compared with untreated samples.
Keywords	Fourier transform infrared spectroscopy ; acetylation ; adhesion ; differential scanning calorimetry ; fabrics ; hemp ; mechanical properties ; polyesters ; scanning electron microscopes ; scanning electron microscopy ; sodium hydroxide ; thermal stability ; thermogravimetry
Language	English
Dates of publication	2012-03
Size	p. 159-169.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2012385-1
ISSN	1879-1069 ; 1359-8368
ISSN (online)	1879-1069
ISSN	1359-8368
DOI	10.1016/j.compositesb.2011.06.003
Database	NAL-Catalogue (AGRICOLA)

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Article: Reinforcement of polypropylene with hemp fibres

Yan, Z.L / Wang, H / Lau, K.T / Pather, S / Zhang, J.C / Lin, G / Ding, Y

Composites. 2013 Mar., v. 46

2013

Abstract: Noil hemp fibre (NHF) is a kind of textile hemp fibre after deep degumming from scutched hemp fibre (SHF), mechanically-degummed hemp fibre. Both NHF and SHF with strong mechanical properties are good candidates as reinforcing fibres for plastics such as ...

Abstract	Noil hemp fibre (NHF) is a kind of textile hemp fibre after deep degumming from scutched hemp fibre (SHF), mechanically-degummed hemp fibre. Both NHF and SHF with strong mechanical properties are good candidates as reinforcing fibres for plastics such as polypropylene (PP). The PP/NHF and PP/SHF composites were blended via internal mixing process. The effect of fibres on the morphology, thermal resistance and reinforcement of the composites were investigated. PP/NHF composites showed higher impact strength, lower flexural strength than PP/SHF at the corresponding loading because NHF has smaller diameter and better thermal resistance than SHF. Meanwhile, NHF has the similar reinforcement to tensile strength with SHF. The effect of maleic anhydride polypropylene (MAPP) on the fibre-resin interface bonding was also comparatively studied. With increasing amount of MAPP, the tensile, flexural and impact strengths of PP/NHF and PP/SHF increased, respectively. The morphology of PP/SHF and PP/NHF results well showed that MAPP improved the interaction of the fibres with PP through chemical adhesion.
Keywords	adhesion ; degumming ; heat tolerance ; hemp ; maleic anhydrides ; mixing ; plastics ; polypropylenes ; tensile strength
Language	English
Dates of publication	2013-03
Size	p. 221-226.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2012385-1
ISSN	1879-1069 ; 1359-8368
ISSN (online)	1879-1069
ISSN	1359-8368
DOI	10.1016/j.compositesb.2012.09.027
Database	NAL-Catalogue (AGRICOLA)

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Article: Development of pH sensitive films for monitoring spoilage volatiles released into packaged fish headspace

Byrne, L / Diamond, D / Lau, K.T

Irish journal of agricultural and food research. 2003, v. 42, no. 1

2003

Abstract: Amines such as trimethylamine (TMA), dimethylamine (DMA) and NH3, collectively known as total volatile basic nitrogen (TVB-N), are released from fish during spoilage. Cresol red was successfully entrapped within a plasticised cellulose acetate matrix to ... ...

Abstract	Amines such as trimethylamine (TMA), dimethylamine (DMA) and NH3, collectively known as total volatile basic nitrogen (TVB-N), are released from fish during spoilage. Cresol red was successfully entrapped within a plasticised cellulose acetate matrix to produce sensors that could monitor the levels of TVB-N released from fish. The dye does not differentiate between the different bases that are released during spoilage but instead responds to any base capable of deprotonating it. Calibration of the sensors using a red light source and a monochrome digital camera suggested that a simple illumination source [such as a light emitting diode (LED)] and a detector (such as a photodiode) could be used to monitor colour changes in the sensors. The pKa of the dye in the solid-phase dye coatings did not vary significantly from that in free solution. There was a linear relationship between the colour intensity of the dye at 573 nm and the log of the NH3 concentration in the headspace. Whiting, obtained from a local market and stored at room temperature, showed a definite and measurable increase in TVB-N levels between 24 and 30 h. Orange roughy and black scabbard, deepwater fish obtained under known conditions, showed a rise in TVB-N levels between 30 and 45 h when stored at room temperature. Samples stored on ice took 160 to 200 h to achieve similar levels of spoilage.
Keywords	ambient temperature ; ammonia ; cameras ; cellulose acetate ; coatings ; color ; dimethylamine ; fish ; food research ; headspace analysis ; Hoplostethus atlanticus ; ice ; lighting ; markets ; monitoring ; pH ; red light ; spoilage ; total volatile basic nitrogen ; trimethylamine
Language	English
Size	p. 119-129.
Document type	Article
ZDB-ID	1116978-3
ISSN	0791-6833
ISSN	0791-6833
Database	NAL-Catalogue (AGRICOLA)

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Article: Development of a smart packaging for the monitoring of fish spoilage

Pacquit, A / Frisby, J / Diamond, D / Lau, K.T / Farrell, A / Quilty, B

Food chemistry. 2007, v. 102, issue 2

2007

Abstract: There is much interest from the fisheries industry in developing rapid methods to evaluate real-time freshness of fish and seafood products. Emphasis is on the ones that would reflect and account for the products history and their storage conditions from ...

Abstract	There is much interest from the fisheries industry in developing rapid methods to evaluate real-time freshness of fish and seafood products. Emphasis is on the ones that would reflect and account for the products history and their storage conditions from “harvest-to-home”. The development of a “smart packaging” that monitors the microbial breakdown products in the headspace of packaged fish is described. When fish spoils it releases a variety of basic volatile amines which are detectable with appropriate pH indicating sensors. These are prepared by entrapping within a polymer matrix a pH sensitive dye that responds, through visible color changes to the spoilage volatile compounds that contribute to a quantity known as total volatile basic nitrogen (TVB-N). Laboratory trials on fresh fish filets showed that the sensor accurately tracks the increase in amines concentration in the package headspace. The response was also found to correlate to changing microbial populations (total viable count or TVC and Pseudomonas spp.). In addition, leaching of the dye was assessed over time to assess the suitability of the sensor formulation for food packaging application.
Keywords	headspace analysis ; food spoilage ; fish ; fish products ; raw foods ; food quality ; freshness ; monitoring ; food packaging ; sensors ; colorimetry ; dyes ; microbial growth ; volatile compounds ; amines ; pH ; rapid methods ; whiting ; cod (fish) ; seasonal variation
Language	English
Size	p. 466-470.
Document type	Article
Note	In the special issue: "Innovations in traditional foods" / edited by P. Fito and F. Toldra. Papers presented at the European Federation of Food Science and Technology 2005 Annual Meeting, held October 25-28, 2005, Valencia, Spain.
ZDB-ID	243123-3
ISSN	1873-7072 ; 0308-8146
ISSN (online)	1873-7072
ISSN	0308-8146
DOI	10.1016/j.foodchem.2006.05.052
Database	NAL-Catalogue (AGRICOLA)

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