A family of compounds, A
BC
D
O
(A = Ba, Pb; B = Te, Sb; C = Al, Ga, Fe, Zn; D = Si, Ge, P, V), with the Dugganite structure was prepared employing traditional solid-state chemistry methods. PXRD and ...Rietveld refinement studies indicate that the compounds are stabilized in P321 space group (no. 150). The compounds are found to be SHG active with values ranging from 1.9 to 15.0 × KDP. The compounds exhibit high dielectric constants and low loss in our studies. The noncentrosymmetry related properties of the new Dugganites were understood by band structure calculations. We also explored the present Dugganite-structured oxides for the development of new inorganic colored materials by substituting Co
, Ni
, Cu
, and Fe
in place of Zn
. Thus, substitution of Co
and Fe
together tunes the blue color of the cobalt compound to blue-green color arising from metal-to-metal charge transfer (MMCT) of Fe
and Co
ions. The tetrahedrally coordinated Ni
in the Dugganite imparts a magenta color.
Background
Interprofessional Education (IPE) and Interprofessional Collaboration (IPC) are being introduced in healthcare institutions gradually to enable comprehensive learning and its application ...to enhance community health outcomes.
Objectives
To assess the attitude of dental students towards Interprofessional Education (IPE) and Interprofessional Collaboration (IPC)
To assess whether Readiness for Interprofessional Learning Scale (RIPLS) is a suitable instrument to measure the attitude of under graduate dental students towards IPE.
To assess how the study year and gender affect the attitude of under graduate dental students towards IPE.
Methods and materials
The research design was a cross‐sectional survey. The dental students of first to fifth year based on availability of students and the existing academic calendar were participated in the study. A total number of 417 validated RIPLS questionnaire were distributed to dental students studying in two dental institutions at Manipal in South India in the year 2017 with the collected response rate of 81.53%. Principal component analysis of the responses was applied to the data along with Varimax rotation and Cronbach alpha to confirm the internal consistency of the questionnaire. Independent sample t test and ANOVA were used to assess the differences between the groups.
Results
Seventy five percent of the respondents were females, and the mean age was 21.26 years (SD = 1.34). The mean scores in RIPLS and all its subscales were high. The mean scores were also higher as the year of study increased and with female students. Senior and female dental students had more encouraging attitudes towards shared learning.
Conclusions
The RIPLS can be utilised to determine the different subscales of learning namely learning behaviour, attitudes, teamwork and collaboration, professional identity perspectives, and roles and responsibilities towards interprofessional education of dental students. The dental students with an Indian outlook, perspective and training had a favourable attitude towards interprofessional learning.
The importance of natural fiber reinforced composites is rapidly developing both in terms of engineering application and research field. These natural fibers are completely renewable, environmental ...friendly, high specific strength, non-abrasive, low cost, bio-degradability. Hence the objective of this research work is to determine the moisture absorption test in media like normal water, bore water, distilled water and sea water and mechanical tests of hybrid composites such as flexural strength and impact strength using static test methods as per ASTM standards. The laminates used for the current study was fabricated by hand layup technique. Coconut coir fiber and glass fiber used as reinforcement and epoxy used as a matrix. Composites are prepared with different percentage of volume fraction. The result from the investigation indicates that incorporation of coconut coir and glass fiber laminate can improve strength and used as an alternate material for glass fiber reinforced composites material.
The stuffed tridymite structure Ba(Zn/Co)1−xSi1−xM2xO4 (M=Al3+ and Fe3+) is explored for the possible multiferroic behavior and to develop new inorganic colored materials. The compounds were ...synthesized by employing conventional solid‐state chemistry methods in the temperature range 1100–1175 °C for 24 h. The powder X‐ray diffraction (PXRD) and Rietveld refinement studies indicate that the compounds stabilize in the P63 space group (no. 173). The refinement results were also rationalized by employing Raman spectroscopic studies. The compounds were found to be second harmonic generation (SHG) active and show weak ferroelectric behavior. The co‐substitution of Co2+ and Fe3+ in the structure gives rise to a weak ferromagnetic behavior to the compound, BaCo0.75Si0.75Fe0.5O4, making it a multiferroic material. The optical studies on the prepared compounds exhibited blue color (Co2+ in Td geometry), purple color (Ni2+ in Td geometry), and simultaneous substitution of Co2+ and Fe3+ gives rise to blue‐green color owing to metal‐to‐metal charge transfer (MMCT) effect.
Getting stuffed: New members of the stuffed tridymite structure, Ba(Zn/Co)1−xSi1−xM2xO4 (M=Al3+ and Fe3+), are studied for multiferroic behavior and inorganic colored materials. The compounds were second harmonic generation (SHG) active and exhibit moderate ferroelectric behavior. The co‐substitution of Co2+ and Fe3+ in the structure gives rise to a weak ferromagnetic behavior. The presence of transition metal elements in these oxides gives rise to brilliantly colored materials, rendering them attractive candidates for new inorganic pigments.
A sample of prehnite from Rayalaseema zone of Andhra Pradesh, India containing about 2.565
wt.% Fe
2O
3 is used in the present work. The mineral has been characterized by EPMA, optical absorption, ...EPR, NIR and Mössbauer techniques. Mössbauer studies confirm the presence of iron as an impurity in two sites. An EPR study on powder sample confirm the presence of Fe(III) impurity in the mineral. Optical absorption spectrum also indicates that Fe(III) impurity is present in two sites with octahedral structure. NIR results are due to water fundamentals.
Advantages of composite materials based on natural fibre have warranted increased utility of these products and have significantly offset the use of artificial fibre composites. This work on ...preparation of fibre-reinforced polymer (FRP) composites has been carried out by utilizing naturally occurring fibres from sisal, jute, banana, and ramie plants. Two sets of FRP composites have been prepared (1) by chemical treatment and (2) without chemical treatment. Detailed characterization of FRP composites prepared has been carried out. Detailed procedures for preparation of the samples have been explained. Parameters like tensile strength, flexural strength, water absorption, density, and microstructure analysis are performed. For density measurement, Archimedes concept using air and water weight measures and ASTM C830-00 guidelines have been followed. KIC-2-1000-C is employed for tensile tests, and digital weighing method is adopted for water absorption analysis. The FRP prepared have a great potential as natural fibre polymer composites (NFPCs) and constitute for a wide range of applications. A significant improvement in these properties has been obtained by heat and chemical treatment of these composites. Satisfactory improvements of the properties were noticed with heat and chemically treated fibre-reinforced composites. Tensile and flexural strength tests were carried out on untreated and treated sisal, jute, ramie and banana fibre-reinforced composites, which revealed significant improvement of treated composites (tensile strength 73.59, 41.70, 36.30 & 33.87 N/mm
2
and flexural strength 60.77, 40.47, 72.05 and 31.54 N/mm
2
, respectively) as compared to untreated composites (tensile strength 57.24, 37.72, 35.19 and 21.83 N/mm
2
and flexural strength 50.51, 40.27, 41.77 and 21.35 N/mm
2
respectively).
This comparative study was conducted to assess background physiologic and pharmacologic parameters of cynomolgus macaques (Macaca fascicularis) from Cambodia, from a mixed Asian source (Cambodia, ...Vietnam and Indonesia), and from Mauritius. This evaluation provides a comprehensive assessment of several of these parameters in a single study. Ten male and 10 female captive-bred, age-matched macaques from each source were evaluated. Criteria for evaluation included weight gain, assessment of drug metabolizing enzyme activity, metabolomic analysis, immunologic assessments (lymphocyte subsets, TDAR, and serum Ig isotyping), clinical pathology evaluations, physical (respiratory, neurologic, cardiovascular, and ophthalmologic) examinations, pathogen screening, organ weights, and gross and microscopic pathology analyses. The results of this evaluation indicate that, compared to macaques of Asian origin, macaques from Mauritius had the lowest incidence and/or severity of spontaneous pathologic findings in several organs and tissues (lymphoid organs, stomach, kidney, urothelium, heart, arteries and lung) and better testicular maturity at a given age with minimal variability in organ weights. Although slight differences were observed in other parameters, none were considered detrimental to the use of macaques of Asian or Mauritius origin in pharmaceutical candidate safety studies with the use of a consistent source, concomitant controls, and appropriate background knowledge and screening.
•Cynomolgus macaques from Mauritius and Asian sources were compared.•Comprehensive assessment of background physiologic and pharmacologic parameters.•Mauritian macaques had fewer spontaneous physiologic and anatomic abnormalities.•Differences not sufficient to exclude using sources evaluated in toxicology studies.•Use consistent macaque source, robust pre-study screens, and concomitant controls.
Abstract
Background and Aims
Patients with cardiovascular disease commonly have chronotropic incompetence which may be associated with cardiac remodelling and increased LV filling pressure. This ...study aimed to determine the association between echocardiography findings and chronotropic incompetence (CI) among patients with cardiovascular disease.
Method and Results
This was a cross-sectional study that included 136 medical records of patients with cardiovascular disease underwent treadmill stress test (TST) and echocardiography examination at outpatient cardiology clinic, Sanglah General Hospital from 2018 until 2020. Chronotropic incompetence was defined as maximum heart rate that can’t reach 85% age-predicted maximum heart rate. Data was analyzed using SPSS version 21. Mann-Whitney U test was used to evaluate the association between echocardiography findings such as ejection fraction (EF), left ventricular internal dimension end-diastolic (LVIDd), LVIDd index (LVIDdi), left ventricular mass, E/E’ ratio, left atrial volume index (LAVI) and CI. Among 136 subjects of this study, the mean age was 54.7 years, 71.3% were male and 37.5% were obese. Patients with CI were found to had lower LVIDd (42.8+0.89 vs 45.2+0.72, p = 0.029), lower LVIDi (24.6+0.37 vs 25.5+ 0.31, p = 0.025), higher left ventricular mass (175.6+3.27 vs 125.1+2.63, p < 0.001), higher E/E’ ratio (17.3+0.29 vs 13+0.35, p < 0.001), and higher LAVI (47+1.98 vs 31.6+1.09, p < 0.001) compared with patients without CI.
Conclusion
Patients with cardiovascular disease commonly have chronotropic incompetence that could be detected by TST examination, which may be partly predicted by echocardiographic parameters that are associated with cardiac remodelling and increased LV filling pressure.
Abstract
Background and Aims
Recent studies found that hypertensive response to exercise (HRE) was associated with development of target organ damage. The study was to determine the echocardiographic ...parameters associated with HRE and role of HRE in rehospitalization within 1 year due to major adverse cardiac event (MACE).
Method and Results
This study was a cohort retrospective study using medical records of patients who underwent treadmill stress test and echocardiography examination at Sanglah General Hospital from May 2018- May 2020 which enrolled 114 patients. Data analysis used SPSS version 21. Pearson chi-square test was used to compare categorical variables based on 1-year rehospitalization after cardiac TST due to MACE that included heart failure, coronary artery disease, stroke, arrhythmia, and cardiovascular death. Mann-Whitney U test was used to compare echocardiographic parameters such as EF, EDV, ES, FS, LVIDd, LVIDs, LV mass index, LAVI, TAPSE, and E/E' ratio. Subjects with HRE had higher LV mass index (82.34±15.05 vs 70.62±9.76), higher E/E’ ratio (16.31±2.95 vs 16.01±13.23), higher LAVI (39.75±15.21 vs 34.27±11.15) with all p-value were <0.05. In this study, HRE also significantly associated with 1-year rehospitalization due to MACE (OR 2.27, 95% CI 1.62–3.16, p = 0.0001).
Conclusions
HRE may be used to predict 1-year rehospitalization due to MACE. In this study it was also found that HRE was associated with several echocardiographic parameters, such as LV mass index, LAVI, and E/E’ ratio. Further study is needed to determine the putative role of cardiac remodeling in patients with HRE.
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