Showing papers by "Manchester Metropolitan University published in 2005"

Validating the organizational climate measure: links to managerial practices, productivity and innovation

Abstract: This paper describes the development and validation of a multidimensional measure of organizational climate, the Organizational Climate Measure (OCM), based upon Quinn and Rohrbaugh's Competing Values model. A sample of 6869 employees across 55 manufacturing organizations completed the questionnaire. The 17 scales contained within the measure had acceptable levels of reliability and were factorially distinct. Concurrent validity was measured by correlating employees' ratings with managers' and interviewers' descriptions of managerial practices and organizational characteristics. Predictive validity was established using measures of productivity and innovation. The OCM also discriminated effectively between organizations, demonstrating good discriminant validity. The measure offers researchers a relatively comprehensive and flexible approach to the assessment of organizational members' experience and promises applied and theoretical benefits. Copyright © 2005 John Wiley & Sons, Ltd.

Psychometric properties of the TSK-11: a shortened version of the Tampa Scale for Kinesiophobia.

Abstract: The Tampa Scale for Kinesiophobia (TSK) is one of the most frequently employed measures for assessing pain-related fear in back pain patients. Despite its widespread use, there is relatively little data to support the psychometric properties of the English version of this scale. This study investigated the psychometric properties of the English version of the TSK in a sample of chronic low back pain patients. Item analysis revealed that four items possessed low item total correlations (4, 8, 12, 16) and four items had response trends that deviated from a pattern of normal distribution (4, 9, 12, 14). Consequently, we tested the psychometric properties of a shorter version of the TSK (TSK-11), having excluded the six psychometrically poor items. The psychometric properties of this measure were compared to those of the original TSK. Both measures demonstrated good internal consistency (TSK: α=0.76; TSK-11: α=0.79), test–retest reliability (TSK: ICC=0.82, SEM=3.16; TSK-11: ICC=0.81, SEM=2.54), responsiveness (TSK: SRM=−1.19; TSK-11: SRM=−1.11), concurrent validity and predictive validity. In respect of specific cut-off scores, a reduction of at least four points on both measures maximised the likelihood of correctly identifying an important reduction in fear of movement. Overall, the TSK-11 possessed similar psychometric properties to the original TSK and offered the advantage of brevity. Further research is warranted to investigate the utility of the new instrument and the cut-off scores in a wider group of chronic pain patients in different clinical settings.

The role of the therapeutic alliance in the treatment of substance misuse: a critical review of the literature.

Abstract: Background - In the past two decades, a number of studies investigating the role of the therapeutic alliance in drug treatment have been published and it is timely that their findings are brought together in a comprehensive review. Aims - This paper has two principal aims: (1) to assess the degree to which the relationship between drug user and counsellor predicts treatment outcome and (2) to examine critically the evidence on determinants of the quality of the alliance. Methods - Peer-reviewed research located through the literature databases Medline, PsycInfo and Ovid Full Text Mental Health Journals using predefined search-terms and published in the past 20 years is considered. Further papers were identified from the bibliographies of relevant publications. Findings - A key finding is that the early therapeutic alliance appears to be a consistent predictor of engagement and retention in drug treatment. With regard to other treatment outcomes, the early alliance appears to influence early improvements during treatment, but it is an inconsistent predictor of post-treatment outcomes. There is relatively little research on the determinants of the alliance. In studies that are available, clients' demographic or diagnostic pre-treatment characteristics did not appear to predict the therapeutic alliance, whereas modest but consistent relationships were reported for motivation, treatment readiness and positive previous treatment experiences. Conclusions - The therapeutic alliance plays an important role in predicting drug treatment process outcomes, but too little is known about what determines the quality of the relationship between drug users and counsellors.

Ballooning dispersal using silk: world fauna, phylogenies, genetics and models.

Abstract: Aerial dispersal using silk (‘ballooning’) has evolved in spiders (Araneae), spider mites (Acari) and in the larvae of moths (Lepidoptera). Since the 17th century, over 500 observations of ballooning behaviours have been published, yet there is an absence of any evolutionary synthesis of these data. In this paper the literature is reviewed, extensively documenting the known world fauna that balloon and the principal behaviours involved. This knowledge is then incorporated into the current evolutionary phylogenies to examine how ballooning might have arisen. Whilst it is possible that ballooning co-evolved with silk and emerged as early as the Devonian (410–355 mya), it is arguably more likely that ballooning evolved in parallel with deciduous trees, herbaceous annuals and grasses in the Cretaceous (135–65 mya). During this period, temporal (e.g. bud burst, chlorophyll thresholds) and spatial (e.g. herbivory, trampling) heterogeneities in habitat structuring predominated and intensified into the Cenozoic (65 mya to the present). It is hypothesized that from the ancestral launch mechanism known as ‘suspended ballooning’, widely used by individuals in plant canopies, ‘tip-toe’ and ‘rearing’ take-off behaviours were strongly selected for as habitats changed. It is contended that ballooning behaviour in all three orders can be described as a mixed Evolutionary Stable Strategy. This comprises individual bet-hedging due to habitat unpredictability, giving an underlying randomness to individual ballooning, with adjustments to the individual ballooning probability being conferred by more predictable habitat changes or colonization strategies. Finally, current methods used to study ballooning, including modelling and genetic research, are illustrated and an indication of future prospects given.

Discourses of Work–Life Balance: Negotiating ‘Genderblind’ Terms in Organizations

Abstract: This article examines current debates about gender equality, work-life balance and flexible working. We contrast policymakers’ and organizational discourses of flexible working and work‐life balance with managers’ and employees’ talk about these issues within their organizations. We show how, despite the increasingly gender-neutral language of the official discourses, in the data studied participants consistently reformulate the debates around gendered explanations and assumptions. For example, a ‘generic female parent’ is constructed in relation to work‐life balance and flexible working yet participants routinely maintain that gender makes no difference within their organization. We consider the effects of these accounts; specifically the effect on those who take up flexible working, and the perceived backlash against policies viewed as favouring women or parents. We argue that the location of work‐life balance and flexibility debates within a gender-neutral context can in practice result in maintaining or encouraging gendered practices within organizations. Implications of this for organizations, for policymakers and for feminist researchers are discussed.

Human postural sway results from frequent, ballistic bias impulses by soleus and gastrocnemius

Abstract: It has been widely assumed for nearly a century, that postural muscles operate in a spring-like manner and that muscle length signals joint angle (the mechano-reflex mechanism). Here we employ automated analysis of ultrasound images to resolve calf muscle (soleus and gastrocnemius) length changes as small as 10 mum in standing subjects. Previously, we have used balancing of a real inverted pendulum to make predictions about human standing. Here we test and confirm these predictions on 10 subjects standing quietly. We show that on average the calf muscles are actively adjusted 2.6 times per second and 2.8 times per unidirectional sway of the body centre of mass (CoM). These alternating, small (30-300 microm) movements provide impulsive, ballistic regulation of CoM movement. The timing and pattern of these adjustments are consistent with multisensory integration of all information regarding motion of the CoM, pattern recognition, prediction and planning using internal models and are not consistent with control solely by local reflexes. Because the system is unstable, errors in stabilization provide a perturbation which grows into a sway which has to be reacted to and corrected. Sagittal sway results from this impulsive control of calf muscle activity rather than internal sources (e.g. the heart, breathing). This process is quite unlike the mechano-reflex paradigm. We suggest that standing is a skilled, trial and error activity that improves with experience and is automated (possibly by the cerebellum). These results complement and extend our recent demonstration that paradoxical muscle movements are the norm in human standing.

Anticipation and visual search behaviour in expert soccer goalkeepers

Abstract: A novel methodological approach is presented to examine the visual search behaviours employed by expert goalkeepers during simulated penalty kick situations in soccer. Expert soccer goalkeepers were classified as successful or unsuccessful based on their performance on a film-based test of anticipation skill, thereby allowing an intra-group comparison of visual search behaviour on the task. The anticipation test required participants to move a joystick in response to penalty kick situations presented on a large screen. The proportion of penalties saved was assessed as well as the frequency and time of initiation of joystick corrections. Visual search behaviour was examined using a portable eye movement registration system. The successful experts were more accurate in predicting the height and direction of the penalty kick, waited longer before initiating a response and appeared to spend longer periods of time fixating on the non-kicking leg compared with the non-successful experts.

The Ghosts of Industrial Ruins: Ordering and Disordering Memory in Excessive Space

Abstract: In this paper I investigate how the effects of the disordered spaces of industrial ruins can interrogate and contest the normative ways in which memory is spatialised in the city. By focusing upon confrontations with the ghosts which haunt ruins, I will suggest that the affective and sensual memories conjured up act as an antidote to the fixed, classified, and commodified memories purveyed in heritage and commemorative spaces. In contradistinction to the didactic and constrained remembering that prevails across Western cities, a form of remembering which is inarticulate, sensual, and conjectural allows improvisatory scope to supplement and challenge ordered forms of social remembering.

‘Clarity bordering on stupidity’: where’s the quality in systematic review?

Abstract: The article presents a critique of the discourse of ‘systematic review’ in education, as developed and promoted by the EPPI‐Centre at the University of London. Based on a close reading of the exhortatory and instructional literature and 30 published reviews, it argues that the approach degrades the status of reading and writing as scholarly activities, tends to result in reviews with limited capacity to inform policy or practice, and constitutes a threat to quality and critique in scholarship and research. The claims that are made for the transparency, accountability and trustworthiness of systematic review do not therefore, it is argued, stand up to scrutiny. The article concludes that systematic review is animated, not just by dissatisfaction with the uncertainties of educational research (a dissatisfaction that it shares with the ‘evidence‐informed movement’ with which it is associated), but by a fear of language itself.

Influence of 90-day simulated microgravity on human tendon mechanical properties and the effect of resistive countermeasures.

Abstract: While microgravity exposure is known to cause deterioration of skeletal muscle performance, little is known regarding its effect on tendon structure and function. Hence, the aims of this study were to investigate the effects of simulated microgravity on the mechanical properties of human tendon and to assess the effectiveness of resistive countermeasures in preventing any detrimental effects. Eighteen men (aged 25-45 yr) underwent 90 days of bed rest: nine performed resistive exercise during this period (BREx group), and nine underwent bed rest only (BR group). Calf-raise and leg-press exercises were performed every third day using a gravity-independent flywheel device. Isometric plantar flexion contractions were performed by using a custom-built dynamometer, and ultrasound imaging was used to determine the tensile deformation of the gastrocnemius tendon during contraction. In the BR group, tendon stiffness estimated from the gradient of the tendon force-deformation relation decreased by 58% (preintervention: 124 +/- 67 N/mm; postintervention: 52 +/- 28 N/mm; P < 0.01), and the tendon Young's modulus decreased by 57% postintervention (P < 0.01). In the BREx group, tendon stiffness decreased by 37% (preintervention: 136 +/- 66 N/mm; postintervention: 86 +/- 47 N/mm; P < 0.01), and the tendon Young's modulus decreased by 38% postintervention (P < 0.01). The relative decline in tendon stiffness and Young's modulus was significantly (P < 0.01) greater in the BR group compared with the BREx group. Unloading decreased gastrocnemius tendon stiffness due to a change in tendon material properties, and, although the exercise countermeasures did attenuate these effects, they did not completely prevent them. It is suggested that the total loading volume was not sufficient to completely prevent alterations in tendon mechanical properties.

Barriers to women achieving their entrepreneurial potential: Women and risk

Abstract: Purpose – This paper provides a comprehensive summary of the academic literature with regard to risk and its role in the entrepreneurial experience of women Entrepreneurial risk has an under‐developed conceptual basis and distilling gender‐specific aspects is difficult Various academic disciplines have contributed to the topic of risk, eg economics, and often decision making is used to contextualise the topic Though the literature does not always prove an association between the different facets of risk and entrepreneurship, there is general agreement that a number of factors, eg personal, political and social inter‐relate to influence risk and subsequent behaviourDesign/methodology/approach – Uses a desk‐based approach to data collection An overview of the main issues concerning risk and entrepreneurship is given to contexualise the gender aspects to be discussed, drawing on the extant literatureFindings – The paper posits that an understanding of the gender aspects of risk is required if polic

In vivo physiological cross-sectional area and specific force are reduced in the gastrocnemius of elderly men

Abstract: Sarcopenia and muscle weakness are well-known consequences of aging. The aim of the present study was to ascertain whether a decrease in fascicle force (Ff) could be accounted for entirely by muscle atrophy. In vivo physiological cross-sectional area (PCSA) and specific force (Ff/PCSA) of the lateral head of the gastrocnemius (GL) muscle were assessed in a group of elderly men [EM, aged 73.8 yr (SD 3.5), height 173.4 cm (SD 4.4), weight 78.4 kg (SD 8.3); means (SD)] and for comparison in a group of young men [YM, aged 25.3 yr (SD 4.4), height 176.4 cm (SD 7.7), weight 79.1 kg (SD 11.9)]. GL muscle volume (Vol) and Achilles tendon moment arm length were evaluated using magnetic resonance imaging. Pennation angle and fiber fascicle length (Lf) were measured using B-mode ultrasonography during isometric maximum voluntary contraction of the plantar flexors. PCSA was estimated as Vol/Lf. GL Ff was calculated by dividing Achilles tendon force by the cosine of theta, during the interpolation of a supramaximal doublet, and accounting for antagonist activation level (assessed using EMG), Achilles tendon moment arm length, and the relative PCSA of the GL within the plantar flexor group. Voluntary activation of the plantar flexors was lower in the EM than in the YM (86 vs. 98%, respectively, P < 0.05). Compared with the YM, plantar flexor maximal voluntary contraction torque and Ff of the EM were lower by 47 and 40%, respectively (P < 0.01). Both Vol and PCSA were smaller in the EM by 28% (P < 0.01) and 16% (P < 0.05), respectively. Also, pennation angle was 12% smaller in the EM, whereas there was no significant difference in Lf between the YM and EM. After accounting for differences in agonists and antagonists activation, the Ff/PCSA of the EM was 30% lower than that of the YM (P < 0.01). These findings demonstrate that the loss of muscle strength with aging may be explained not only by a reduction in voluntary drive to the muscle, but mostly by a decrease in intrinsic muscle force. This phenomenon may possibly be due to a reduction in single-fiber specific tension.

Changes in triceps surae muscle architecture with sarcopenia.

Abstract: Aim: To investigate whether sarcopenia was evenly distributed among the three components of the triceps surae (TS) muscle group. Methods: Muscle volume (VOL), fibre fascicle length (Lf), pennation angle (θ) and physiological cross-sectional area (PCSA = VOL/Lf) were measured in vivo for the lateral (GL) and medial (GM) heads of the gastrocnemius muscles and for the soleus muscle (SOL), in 15 young males (YM, aged 25.3 ± 4.5 years) and 12 elderly males (EM aged 73.8 ± 4.4 years). Results: In the EM, VOL of all three muscles was significantly smaller than in the YM; differences were: 27% for the GL (P < 0.01), 29% for the GM (P < 0.01) and 17% for the SOL (P < 0.05). In total, TS VOL was 22% smaller in EM than in YM (P < 0.01). In the EM, values of θ were significantly smaller than in the YM; by 15–18% for the GL, GM and SOL (P < 0.05). In the EM, Lf of the GM was 16% smaller than in the YM (P < 0.01); no significant differences were found in the other muscles. PCSA of the GL and GM were both found to be smaller in EM by 19% (P < 0.01) and 14.5% (P < 0.05), respectively. No difference was observed in the SOL PCSA between YM and EM. Interestingly, probably because of the prevalent contribution of the SOL to PCSA distribution of each muscle to the TS PCSA, the relative TS PCSA was not different between YM and EM. Furthermore, the Lf/muscle length ratio did not differ between YM and EM. Conclusion: The present study shows that the relative PCSA composition of the TS is maintained with ageing and that the PCSA is scaled down harmonically with the decrease in muscle volume and fascicle length. Such observation suggests that the relative contribution of the components of the TS muscle to the total force developed by this muscle group is maintained with ageing.

Waste Matter - The Debris of Industrial Ruins and the Disordering of the Material World:

Abstract: By exploring the disordering effects of ruination, this article critically explores the ways in which the material world is normatively ordered. The yet to be disposed of objects in ruins have been identified as ‘waste’, an assignation which testifies to the power of some to normatively order the world, but also is part of an excess, impossible to totally erase, which contains rich potential for reinterpretation and reuse because it is under-determined. Through processes of decay and non-human intervention, objects in ruins gradually transform their character and lose their discreteness, they become charged with alternative aesthetic properties, they impose their materiality upon the sensory experience of visitors, and they conjure up the forgotten ghosts of those who were consigned to the past upon the closure of the factory but continue to haunt the premises. In these ways, ruined matter offers ways for interacting otherwise with the material world.

Riparian plant species loss alters trophic dynamics in detritus-based stream ecosystems

Abstract: Riparian vegetation is closely connected to stream food webs through input of leaf detritus as a primary energy supply, and therefore, any alteration of plant diversity may influence aquatic ecosystem functioning. We measured leaf litter breakdown rate and associated biological parameters in mesh bags in eight headwater streams bordered either with mixed deciduous forest or with beech forest. The variety of leaf litter types in mixed forest results in higher food quality for large-particle invertebrate detritivores ('shredders') than in beech forest, which is dominated by a single leaf species of low quality. Breakdown rate of low quality (oak) leaf litter in coarse mesh bags was lower in beech forest streams than in mixed forest streams, a consequence of lower shredder biomass. In contrast, high quality (alder) leaf litter broke down at similar rates in both stream categories as a result of similar shredder biomass in coarse mesh bags. Microbial breakdown rate of oak and alder leaves, determined in fine mesh bags, did not differ between the stream categories. We found however aquatic hyphomycete species richness on leaf litter to positively co-vary with riparian plant species richness. Fungal species richness may enhance leaf litter breakdown rate through positive effects on resource quality for shredders. A feeding experiment established a positive relationship between fungal species richness per se and leaf litter consumption rate by an amphipod shredder (Gammarus fossarum). Our results show therefore that plant species richness may indirectly govern ecosystem functioning through complex trophic interactions. Integrating microbial diversity and trophic dynamics would considerably improve the prediction of the consequences of species loss.

Time reversible and symplectic integrators for molecular dynamics simulations of rigid molecules

Abstract: Molecular dynamics integrators are presented for translational and rotational motion of rigid molecules in microcanonical, canonical, and isothermal-isobaric ensembles. The integrators are all time reversible and are also, in some approaches, symplectic for the microcanonical ensembles. They are developed utilizing the quaternion representation on the basis of the Trotter factorization scheme using a Hamiltonian formalism. The structure is similar to that of the velocity Verlet algorithm. Comparison is made with standard integrators in terms of stability and it is found that a larger time step is stable with the new integrators. The canonical and isothermal-isobaric molecular dynamics simulations are defined by using a chain thermostat approach according to generalized Nose–Hoover and Andersen methods.

Active, non‐spring‐like muscle movements in human postural sway: how might paradoxical changes in muscle length be produced?

Abstract: In humans, during standing the calf muscles soleus and gastrocnemius actively prevent forward toppling about the ankles. It has been generally assumed that these postural muscles behave like springs with dynamic stiffness reflecting their mechanical properties, reflex gain including higher derivatives, and central control. Here, for the first time, we have used an ultrasound scanner and automated image analysis to record the tiny muscular movements occurring in normal standing. This new, non-invasive technique resolves changes in muscle length as small as 10 mum without disturbing the standing process. This technical achievement has allowed us to test the long-established mechano-reflex, muscle spring hypothesis that muscle length changes in a spring-like way during sway of the body. Our results contradict that hypothesis. Muscle length changes in a non-spring-like manner: on average, shortening during forward sway and lengthening during backwards sway (paradoxical movements). This counter-intuitive result is a consequence of the fact that calf muscles generate tension through a series elastic component (SEC, Achilles tendon and foot) which limits maximal ankle stiffness to 92 +/- 20% of that required to balance the body. Paradoxical movements cannot be generated by stretch reflexes with constant intrafusal drive but might be produced by reflex coupling of extrafusal (alpha) and intrafusal (beta, gamma) drive or by positive force feedback. Standing requires the predictive ability to produce the observed muscle movements preceded (110 +/- 50 ms) by corresponding changes in integrated EMG signal. We suggest higher level anticipatory control is more plausible.

The unhappy shopper, a retail experience: exploring fashion, fit and affordability

Abstract: Purpose – This paper explores fashion availability, fit and affordability in the UK stores especially for those women who wear size 16 and over; and examines their satisfaction/dissatisfaction with the retail experience.Design/methodology/approach – The satisfaction of customer needs remains a fundamental tenet of marketing theory, research and application. This survey was an exploratory study into satisfaction/dissatisfaction with the fashion provision and shopping environments for women in the UK. A questionnaire solicited the views of 250 women thereby enabling the researchers to gauge consumers' views on sizing, fit and fashion availability, perception of current offers, pricing and shopping environments.Findings – A large percentage of females, particularly those who wear size 16 and over, are dissatisfied with retail environments, fashion and sizing provision among major UK market players. While most women shopped from the high street and department stores, the larger woman had great difficulty in f...

Effects of Prior Warm-up Regime on Severe-Intensity Cycling Performance

Abstract: Burnley, M, Doust, J and Jones, A (2005) Effects of Prior Warm-up Regime on Severe-Intensity Cycling Performance. Medicine and Science in Sports and Exercise, 37 (5). pp. 838-845. ISSN 1530-0315 RAE2008

Employment, individualization and insecurity: rethinking the risk society perspective

Abstract: German sociologist Ulrich Beck maintains that economic, technological and environmental transitions have radically reshaped employment relations in Western Europe. Whilst theories of employment tra...

Lacanian Discourse Analysis in Psychology: Seven Theoretical Elements

Abstract: This paper describes seven key elements of the psychoanalytic work of Jacques Lacan that have a direct bearing on the development of theory for discourse analysis in psychology and implications for discourse-analytic reading of text. The paper reconstructs an account of discourse from Lacanian clinical and cultural practice and elaborates upon the way this practice conceives of: (i) formal qualities of text; (ii) anchoring of representation; (iii) agency and determination; (iv) the role of knowledge; (v) positions in language; (vi) deadlocks of perspective; and (vii) interpretation of textual material. While some of the elements outlined here are compatible with current social constructionist perspectives, Lacan’s work takes us beyond these approaches to something quite new.

An energy balance of front crawl.

Abstract: With the aim of computing a complete energy balance of front crawl, the energy cost per unit distance (C= Ėv−1, where Ė is the metabolic power and v is the speed) and the overall efficiency (ηo=Wtot/C, where Wtot is the mechanical work per unit distance) were calculated for subjects swimming with and without fins. In aquatic locomotion Wtot is given by the sum of: (1) Wint, the internal work, which was calculated from video analysis, (2) Wd, the work to overcome hydrodynamic resistance, which was calculated from measures of active drag, and (3) Wk, calculated from measures of Froude efficiency (ηF). In turn, ηF=Wd/(Wd+Wk) and was calculated by modelling the arm movement as that of a paddle wheel. When swimming at speeds from 1.0 to 1.4 m s−1, ηF is about 0.5, power to overcome water resistance (active body drag × v) and power to give water kinetic energy increase from 50 to 100 W, and internal mechanical power from 10 to 30 W. In the same range of speeds Ė increases from 600 to 1,200 W and C from 600 to 800 J m−1. The use of fins decreases total mechanical power and C by the same amount (10–15%) so that ηo (overall efficiency) is the same when swimming with or without fins [0.20 (0.03)]. The values of ηo are higher than previously reported for the front crawl, essentially because of the larger values of Wtot calculated in this study. This is so because the contribution of Wint to Wtot was taken into account, and because ηF was computed by also taking into account the contribution of the legs to forward propulsion.

Peer assessment of oral presentations: effects of student gender, university affiliation and participation in the development of assessment criteria

Abstract: Peer assessment provides a useful mechanism to develop many positive qualities in students studying in higher education (HE). Potential influences on peer‐awarded marks include student qualities such as gender, HE background (e.g. university affiliation) and participation in the development of the assessment criteria. Many studies that have investigated peer assessment have placed great emphasis on marks from a single tutor, or very few tutors, from a single university. This study examined grades awarded by 11 tutors (affiliated with four universities) to oral presentations delivered on a residential field course by second‐year undergraduate students from two universities studying environmental or biological disciplines. Student assessors awarded marks of fairly high precision (correlating strongly with tutor grades) but averaged 5% higher than their tutors (i.e. of only moderate accuracy). Marginally higher marks (circa 1.6%) were awarded by student assessors to speakers studying at the same university. ...

Photocatalytic Coatings for Environmental Applications

Abstract: A series of nano- and micronparticle-grade anatase and rutile titanium dioxide pigments have been prepared with various densities of surface treatments, particle size and surface area. Their photocatalytic activites have been determined in a series of paint films by FTIR, chalking, color, gloss change and weight loss after artifical weathering. The pigments have also been examined by rapid assessment methodologies using photodielectric microwave spectroscopy, 2-propanol oxidation and hydroxyl analysis. The microwave response under light and dark cycles provides an extended timescale probe of charge-carrier dynamics in the pigments. Pigment particle size, surface area and properties clearly play an important role in dispersion and any polymer-pigment interactions. Photooxidation studies on several types of paint films show a clear demarcation between nanoparticle- and pigmentary-grade titanium dioxide, with the former being more active because of their greater degree of catalytic surface activity. The photosensitivity of titanium dioxide is considered to arise from localized sites on the crystal surface (i.e. acidic OH), and occupation of these sites by surface treatments inhibits photoreduction of the pigment by ultraviolet radiation; hence, the destructive oxidation of the binder is inhibited. Coatings containing 2-5% by weight alumina or alumina and silica are satisfactory for general-purpose paints. If greater resistance to weathering is desired, the pigments are coated more heavily to about 7-10% weight. The coating can consist of a combination of several materials, e.g. alumina, silica, zirconia, aluminum phosphates of other metals. For example, the presence of hydrous alumina particles lowers van der Waals forces between pigments particles by several orders of magnitude, decreasing particle-particle attractions. Hydrous aluminum oxide phases appear to improve dispersibility more effectively than most of the other hydroxides and oxides. Coated nanoparticles are shown to exhibit effective light stabilization in various water- and oil-based paint media in comparison with conventional organic stabilizers. Hindered piperidine stabilizers are shown to provide no additional benefits in this regard, often exhibiting strong antagonism. The use of photocatalytic titania nanoparticles in the development of self-cleaning paints and microbiological surfaces is also demonstrated in this study. In the former case, surface erosion is shown to be controlled by varying the ratio of admixture of durable pigmentary-grade rutile (heavily coated) and a catalytic-grade anatase nanoparticle. For environmental applications in the development of coatings for destroying atmospheric pollutants such as nitrogen oxide gases (NO(X)), stable substrates are developed with photocatalytic nanoparticle-grade anatase. In this study, porosity of the coatings through calcium carbonate doping is shown to be crucial in the control of the effective destruction of atmospheric NO(X) gases. For the development of microbiological substrates for the destruction of harmful bacteria, effective nanoparticle anatase titania is shown to be important, with hydrated high surface area particles giving the greatest activity.