Short communication: Evaluation of a sol-gel–based stainless steel surface modification to reduce fouling and biofilm formation during pasteurization of milk

Milk fouling and biofilms are common problems in the dairy industry across many types of processing equipment. One way to reduce milk fouling and biofilms is to modify the characteristics of milk contact surfaces. This study examines the viability of using Thermolon (Porcelain Industries Inc., Dickson, TN), a sol-gel-based surface modification of stainless steel, during thermal processing of milk. We used stainless steel 316L (control) and sol-gel-modified coupons in this study to evaluate fouling behavior and bacterial adhesion. The surface roughness as measured by an optical profiler indicated that the control coupons had a slightly smoother finish. Contact angle measurements showed that the modified surface led to a higher water contact angle, suggesting a more hydrophobic surface. The modified surface also had a lower surface energy (32.4 ± 1.4 mN/m) than the control surface (41.36 ± 2.7 mN/m). We evaluated the susceptibility of control and modified stainless steel coupons to fouling in a benchtop plate heat exchanger. We observed a significant reduction in the amount of fouled layer on modified surfaces. We found an average fouling weight of 19.21 mg/cm² and 0.37 mg/cm² on the control and modified stainless steel coupons, respectively. We also examined the adhesion of Bacillus and biofilm formation, and observed that the modified stainless steel surface offered greater resistance to biofilm formation. Overall, the Thermolon-modified surface showed potential in the thermal processing of milk, offering significantly lower fouling and bacterial attachment than the control surface.     

THE ATTACHMENT OF BREWING YEAST TO GLASS

The secondary conditioning of cask and bottled beer with live yeast is normally facilitated by ensuring the sedimentation of the yeast to the base of the package prior to dispense. Here we examine the resistance of yeast sediment to disruption in bottled conditioned beer by investigating the attachment of brewing yeast to glass. An attachment assay is described which, when applied to brewing yeast, demonstrated that these yeasts are not naturally adhesive. However, yeast may be encouraged to form an attached mat by the physiological manipulation of starvation. The significance of this observation is discussed in relation to the effect of beer composition on yeast attachment.     

Review of Relationality: From Attachment to Intersubjectivity.

Review of book: Relationality: From Attachment to Intersubjectivity by Stephen Mitchell, Hillsdale, NJ: Analytic Press, 2000, 173 pp. Reviewed by Timothy J. Zeddies. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Attachment theory and rections to others' needs: Evidence that activiation of the sense of attachment security promotes empathic responses.

Five studies examined the effects of chronic and contextual activation of attachment security on reactions to others' needs. The sense of attachment security was contextually primed by asking participants to recollect personal memories, read a story, or look at a picture of supportive others or by subliminally exposing them to proximity-related words. This condition was compared against the priming of neutral themes, positive affect, or attachment-insecurity schemas. Then reports of empathy and personal distress or the accessibility of empathy and personal-distress memories were assessed. Attachment-security priming strengthened empathic reactions and inhibited personal distress. Self-reports of attachment anxiety and avoidance were inversely related to empathy, and attachment anxiety was positively related to personal distress. The discussion emphasizes the relevance of attachment theory for explaining reactions to others' needs. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Bubble attachment time and FTIR analysis of water structure in the flotation of sylvite, bischofite and carnallite

Water structure is the most important parameter that influences the flotation of soluble salts. In this paper bubble attachment time measurements and FTIR analyses were performed to investigate the effect of water structure on the flotation behavior of sylvite (KCl), bischofite (MgCl₂·6H₂O) and carnallite (KMgCl₃·6H₂O). The results from bubble attachment time measurements suggest that collector adsorption at the surface of KCl induces flotation with either the cationic collector, ODA, or anionic collector, SDS. In contrast bubble attachment did not occur for bischofite (MgCl₂·6H₂O) or carnallite (KMgCl₃·6H₂O). Results show that the surface charge is not a determining factor in the flotation of soluble salts.Further, the interaction between water molecules and the three chloride salts dissolved in aqueous solution were studied by measuring the shift in the hydrogen-bonding of water molecules. The results indicate that KCl is a structure breaker salt, while MgCl₂·6H₂O and KMgCl₃·6H₂O are structure maker salts.Viscosities for the brines of these three salts were determined. The results give additional evidence of differences in water structure and are in good agreement with the FTIR and bubble attachment results. The findings provide further evidence that water structure plays an important role in the flotation of soluble salts.     

Priming Prepositional-Phrase Attachment During Comprehension.

Strong evidence suggests that prior syntactic context affects language production (e.g., J. K. Bock, 1986). The authors report 4 experiments that used an expression-picture matching task to investigate whether it also affects ambiguity resolution in comprehension. All experiments examined the interpretation of prepositional phrases that were ambiguous between high and low attachment. After reading a prime expression with a high-attached interpretation, participants tended to interpret an ambiguous prepositional phrase in a target expression as highly attached if it contained the same verb as the prime (Experiment 1), but not if it contained a different verb (Experiment 2). They also tended to adopt the high-attached interpretation after producing a prime with the high-attached interpretation that included the same verb (Experiment 3). Finally, they were faster to adopt a high-attached interpretation after reading an expression containing the same verb that was disambiguated to the high-attached versus the low-attached interpretation (Experiment 4). (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Less is more: Meta-analyses of sensitivity and attachment interventions in early childhood.

Is early preventive intervention effective in enhancing parental sensitivity and infant attachment security, and if so, what type of intervention is most successful? Seventy studies were traced, producing 88 intervention effects on sensitivity (n=7,636) and/or attachment (n=1,503). Randomized interventions appeared rather effective in changing insensitive parenting (d=0.33) and infant attachment insecurity (d=0.20). The most effective interventions used a moderate number of sessions and a clear-cut behavioral focus in families with, as well as without, multiple problems. Interventions that were more effective in enhancing parental sensitivity were also more effective in enhancing attachment security, which supports the notion of a causal role of sensitivity in shaping attachment. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

钻夹具设计一例

结合实例，介绍了夹具设计的经验，特别就提高孔位置精度的问题进行了探讨。     

The place of neighbourhood in social cohesion: insights from massey, West Auckland

Within public health discourse there is growing recognition that the social structures and ecology of neighbourhoods impact on health and wellbeing. A clearer understanding of the pathways through which this influence occurs will inform locality-based interventions to tackle inequalities. In this paper we report on an interview based study with parents of young children living in Massey, a suburban neighbourhood of metropolitan Auckland. Locational access to community resources is comparatively poor in Massey as measured by a community resource accessibility index. The findings provide insights into the impact of such access to services and amenities on neighbourhood social cohesion. We conclude by suggesting planning strategies for strengthening neighbourhood identification and attachment for this population group.     

Possibilities to improve the short-term dosing constancy of volumetric feeders

For some applications, e.g. processes with stoichiometric reactions or the mixing of powders in a static mixer, a high short-term dosing constancy is necessary. For the dosing of calcium carbonate with a median diameter of 2 μm, it is shown that the pulsation of a volumetric feeder can be reduced tremendously by the use of different attachments for the dosing tube. The best results were obtained with a self-developed rotating star attachment. The quantitative assessment of the efficiency was performed both in the time domain with the standard deviation and in the frequency domain with the fast Fourier transformation.