Fabrication and testing of microfluidic devices for blood cell separation

This paper was presented at the 2nd Micro and Nano Flows Conference (MNF2009), which was held at Brunel University, West London, UK. The conference was organised by Brunel University and supported by the Institution of Mechanical Engineers, IPEM, the Italian Union of Thermofluid dynamics, the Process Intensification Network, HEXAG - the Heat Exchange Action Group and the Institute of Mathematics and its Applications.Blood separation is a strategic preliminary step in preparation to on-chip biological analysis. Two microfluidic devices for on-chip blood separation are presented. Both devices will be integrated to form the separation module of a Lab on Chip for non-invasive prenatal diagnosis. In the first device, a blood plasma separator, the separation of blood cells from plasma is made possible in microchannels by bio-physical effects such as an axial migration effect and Zweifach-Fung bifurcation law. Behaviour of mussel and human blood suspensions were studied alongside the effect of different geometries. The second device aims to separate fetal nucleated red blood cells based on their magnetic susceptibility. Biocompatible materials are used in the manufacturing of both devices.The authors acknowledge the financial support of the Engineering and Physical Science Research Council (EPSRC) through the funding of the Grand Challenge Project ‘3DMintegration’, reference EP/C534212/1. This work has also been supported by the EPSRC through a Doctoral Training Account (DTA) and has been performed at the Microsystems Engineering Centre (MISEC), Heriot-Watt University, Edinburgh. We thank Tim Ryan and Phil Summersgill, Epigem Ltd. for the fabrication of the blood plasma chips. The fabrication work was carried out in the Fluence Microfluidics Application Centre supported by the DTI and the OneNE Regional Development Agency as part of the UK's MNT Network

Experimental investigation of open-ended microwave oven assisted encapsulation process

An open ended microwave oven is presented with improved uniform heating, heating rates and power conversion efficiency. This next generation oven produces more uniform EM fields in the evanescent region forming part of the heating area of the oven. These fields are vital for the rapid and uniform heating of various electromagnetically lossy materials. A fibre optic temperature sensor and an IR pyrometer are used to measure in situ and in real-time the temperature of the curing materials. An automatic computer controlled closed feedback loop measures the temperature in the curing material and drives the microwave components to obtain predetermined curing temperature cycles for efficient curing. Uniform curing of the lossy encapsulants is achieved with this oven with typical cure cycle of 270 seconds with a ramp rate of 1oC/s and a hold period of 2 minutes. Differential scanning calorimeter based measurement for the pulsed microwave based curing of the polymer dielectric indicates a ~ 100% degree of cure

Characteristics, seasonality and sources of carbonaceous and ionic components in the tropical aerosols from Indian region

To better characterize the tropical aerosols in Indian region, PM<sub>10</sub> samples collected from Chennai, India (13.04° N; 80.17° E) were analyzed for carbonaceous and water-soluble ionic components. Concentration ranges of elemental carbon (EC) and organic carbon (OC) were 2.4–14 μg m<sup>−3</sup> (ave. 6.5 μg m<sup>−3</sup>) and 3.2–15.6 μg m<sup>−3</sup> (ave. 9.1 μg m<sup>−3</sup>) in winter samples whereas they were 1.1–2.5 μg m<sup>−3</sup> (ave. 1.6 μg m<sup>−3</sup>) and 4.1–17.6 μg m<sup>−3</sup> (ave. 9.7 μg m<sup>−3</sup>) in summer samples, respectively. Concentration of secondary organic carbon (SOC) retrieved from EC-tracer method was 4.6±2.8 μg m<sup>−3</sup> in winter and 4.3±2.8 μg m<sup>−3</sup> in summer. OC accounted for 38.5±14 % (<i>n</i> = 49) of combined concentrations of carbonaceous and ionic components in PM<sub>10</sub>. We also found that OC concentrations are generally higher than those of SO<sub>4</sub><sup>2−</sup> (8.8±2.5 μg m<sup>−3</sup> and 4.1±2.7 μg m<sup>−3</sup> in winter and summer, respectively), which was the most abundant ionic species (57 %) followed by NH<sub>4</sub><sup>+</sup> (15 %) >NO<sub>3</sub><sup>−</sup>>Cl<sup>−</sup>>K<sup>+</sup>>Na<sup>+</sup>> Ca<sup>2+</sup>>MSA<sup>−</sup>>Mg<sup>2+</sup>. The mass fractions of EC, organic matter (OM) and ionic species varied seasonally, following the air mass trajectories and corresponding source strength. Based on mass concentration ratios of selected components and relations of EC and OC to marker species, we found that biofuel/biomass burning is a major source of atmospheric aerosols in South and Southeast Asia. The high concentrations of SOC and WSOC/OC ratios (ave. 0.45; <i>n</i> = 49) as well as good correlations between SOC and WSOC suggest that the secondary production of organic aerosols during long-range atmospheric transport is also significant in this region. This study provides the baseline data of carbonaceous aerosols for southern part of the Indian subcontinent

The NMDA receptor GluN2C subunit controls cortical excitatoryinhibitory balance, neuronal oscillations and cognitive function

Despite strong evidence for NMDA receptor (NMDAR) hypofunction as an underlying factor for cognitive disorders, the precise roles of various NMDAR subtypes remains unknown. The GluN2Ccontaining NMDARs exhibit unique biophysical properties and expression pattern, and lower expression of GluN2C subunit has been reported in postmortem brains from schizophrenia patients. We found that loss of GluN2C subunit leads to a shift in cortical excitatory-inhibitory balance towards greater inhibition. Specifically, pyramidal neurons in the medial prefrontal cortex (mPFC) of GluN2C knockout mice have reduced mEPSC frequency and dendritic spine density and a contrasting higher frequency of mIPSCs. In addition a greater number of perisomatic GAD67 puncta was observed suggesting a potential increase in parvalbumin interneuron inputs. At a network level the GluN2C knockout mice were found to have a more robust increase in power of oscillations in response to NMDAR blocker MK- 801. Furthermore, GluN2C heterozygous and knockout mice exhibited abnormalities in cognition and sensorimotor gating. Our results demonstrate that loss of GluN2C subunit leads to cortical excitatoryinhibitory imbalance and abnormal neuronal oscillations associated with neurodevelopmental disorders

Challenges to Implementation of the Co-Curriculum in Accredited Pharmacy Programs

Objective. To determine areas of concern, and challenges to implementing and assessing the co-curriculum in accredited Doctor of Pharmacy programs, along with how confident programs are in their ability to meet the co-curriculum requirement as mandated by the Accreditation Council for Pharmacy Education (ACPE). Methods. A survey was administered to all ACPE-accredited pharmacy programs to collect information regarding areas of concern, challenges, and confidence in their ability to meet the co-curriculum requirement. The frequency of responses to items are presented along with comparisons based on characteristics, including institution type, cohort size, most recent ACPE accreditation review, and supporting offices. Results. The most common concerns centered on the documentation and assessment process. The most commonly reported challenges were lack of enthusiasm or buy-in from faculty, staff, and students; lack of a clear definition of co-curriculum; and faculty time and insufficient staff. Overall, programs had a high level of confidence in their ability to meet the requirements for co-curriculum. The only differences found were related to supporting offices and cohort size. Conclusion. The results suggest that having supporting offices may reduce the co-curriculum burden. Similarly, student cohort size may have an impact on the challenges for some programs, particularly those with moderate-sized cohorts reporting challenges related to faculty and staff. Further research is needed to determine how programs address these critical issues, and to explore whether programs report differently on these areas after completing an accreditation review. The study results may be useful to members of the Academy when evaluating co-curriculum

M40 GRADE SELF COMPACTED CONCRETE & COMPARISION IN BEHAVIOUR WITH M40 CONVENTIONAL CONCRETE

Self-compacting concrete (SCC) can get rid of the problem, because it is built to consolidate under its very own mass. Normal concrete was created by utilizing IS method and self-compacting concrete was created with a simple mix design suggested by Nan Su. SCC was created in 1988’s by Prof. Hagime Okamura in Japan. Conventional concrete has a tendency to present an issue with regard to sufficient consolidation in thin sections or regions of congested reinforcement, which results in a sizable amount of entrapped air voids and compromises the durability and strength from the concrete. SCC was among the special concrete in around the globe. This project handles the comparison of two various kinds of high strength concretes they're high strength conventional concrete and strength self-compacting concrete. An experimental and statistical study mechanical qualities, for example compressive strength, flexural strength and split tensile strength of self-compacting concrete (SCC) and also the corresponding qualities of conventional concrete (CC) were studied

Co-Curriculum Implementation and Assessment in Accredited Doctor of Pharmacy Programs

Objective. To determine how accredited Doctor of Pharmacy programs implement and evaluate the co-curriculum requirement as mandated by the Accreditation Council for Pharmacy Education (ACPE). Methods. A survey was administered to all ACPE-accredited pharmacy programs to collect information regarding how co-curriculum models were being implemented, including types of activities, structure, learning outcomes, oversight, and assessment. The frequency of responses to items were presented to describe the general features of co-curriculum models. Results. The types of co-curricular activities reported by programs were generally consistent, with the majority of programs categorizing these activities and allowing students to choose which they would engage in. Most respondents reported that the program mapped co-curricular activities to learning outcomes, primarily ACPE Standards 1-4. The structural oversight of the co-curriculum typically included a co-curriculum committee, subcommittee, or task force, and supporting offices. The most common offices/departments involved in the co-curriculum were assessment, student affairs/services, experiential education, and academic/curricular affairs. The most common assessments were reflections, self-assessment surveys, and checklists. Conclusion. In most programs, implementation of the co-curriculum was a joint effort among various individuals, committees, and offices. Given the developing nature of programs, descriptive studies should be repeated to identify how programs develop and enhance co-curriculum models. The study results may be useful to members of the Academy when evaluating the current state of co-curriculum implementation and potential areas for program development