134 research outputs found
Effect of MWCNTs on Wetting and Thermal Properties of an Immiscible Polymer Blend
No full textPoly (trimethylene terephthalate)/Polypropylene blend (PTT/PP) is prepared using melt mixing method and 1 wt% multiwalled carbon nanotubes (MWCNTs) are incorporated to study its effect on the thermal and wetting properties. The droplet morphology reveals the immiscibility of the neat polymers in the blend and there is a reduction in the domain size of the dispersed phase with the addition of MWCNTs due to the compatibilization effect of MWCNTs. With the addition of MWCNTs, there is a slight improvement in the melting temperatures of both PTT and PP while an increase in the crystallization temperature and glass transition temperature (Tg) is observed that may be due to the nucleation effect of MWCNTs. On blending with PP, the thermal stability of PTT matrix is increased and with the addition of MWCNTs there is not much improvement in the thermal stability of the polymer components is observed. With the addition of MWCNTs the contact angle of the blend slightly increased, may be attributed to the hydrophobic nature of MWCNTs
Histomorphological Study of Lichen Planus and Lichenoid Drug Eruptions
Get PDFBACKGROUND :
Lichen planus is an idiopathic, chronic inflammatory
disease of the skin, mucous membrane and nails. Several
hypotheses have been made regardingits aetiology, including
genetic, infective, psychogenic and autoimmune factors. Lichenoid
drug eruption has clinical similarity to Lichen planus.
Erythematous to violaceous papules and plaques develop on the
trunk and extremities in association with drug
ingestion.Histopathological analysis is required in order to make
an accurate diagnosis so that required treatment can be
rendered. Thus histopathologic studies are essential for
corroborating the clinical diagnosis or ruling out the possibility of
other diseases that are being considered on the basis of clinical
picture.Light microscopy of lichenoid lesions reveals the variants
of Lichen planus and features of Lichenoid drug
reactions.Therefore Light microscopy is one of the simplest and
most reliable methods of diagnosis.
AIMS AND OBJECTIVES :
1.
To study the morphological and histopathology of clinically
established cases of Lichen Planus (LP) andLichenoid Drug Eruption
(LDE).
2. To compare the clinical forms and histopathological criteria of
different forms of Lichen Planus (LP) and Lichenoid Drug Eruption
(LDE).
MATERIALS AND METHODS :
This study is a descriptive study conducted on 65 cases of
Lichen planus and 7 cases of Lichenoid drug eruptions and each case
was evaluated for the morphological and histopathological features.
RESULTS :
Out of the total 72 cases, 65 cases(90.28%) were diagnosed with
lichen planus, out of which 50 (76.92%) cases were Classical/
Idiopathic Lichen Planus(ILP). The other microscopic/Clinical variants
detected were Actinic LP in 3 (4.62%)cases, Hypertrophic LP in 4
(6.15%) cases, Pigmented LP in 3(4.62%) cases, Follicular LP in 2
(3.08%) cases, Overlap LP in 2 (3.08%) cases and bullous LP in 1
(1.54%). The remaining 7 cases(9.72%) were diagnosed with
Lichenoid drug eruptions.
CONCLUSION :
Histhopathological features on light microscopy were
conclusive in diagnosing all the cases of lichen planus (&its variants) & lichenoid drug eruptions.
Histopathologicalexamination played an important role in making an accurate diagnosis of clinically diagnosed cases of lichen planus&lichenoid drug eruptions and also in ruling out themimics
Spectral and density functional studies on the absorbance and fluorescence spectra of 2-R-5-phenyl-1,3,4-oxadiazoles and their conjugate acids
No full textAbsorption and fluorescence spectra of 2-R-5-phenyl-1,3,4-oxadiazoles (R = H, methyl, tert-butyl, trifluoromethyl, amino, phenyl, benzyl) were studied experimentally and by time dependent density functional theory (TDDFT) methods. In acidic media a substantial red shift is observed due to the presence of conjugate acid forms. Two conjugate acid forms (3H and 4H) are possible for unsymmetrically substituted oxadiazoles. Relative basicities of the two basic centers of oxadiazole ring at the S-0 and S-1 geometries were calculated using the local density descriptors approach. Substituent effects were studied by analyzing the electron density distribution in the ground and excited states. Analyzing the absorption spectra and local descriptors results, we predict 4H forms to be the dominant acid forms. Calculated emission peaks of 4H forms agree well with experimental observations. An abnormal red shift in the case of the 3H forms is attributed to the increased stabilization of the N-H bond in the 3H forms compared to the 4H forms
CLTestCheck: Measuring Test Effectiveness for GPU Kernels
Get PDFMassive parallelism, and energy effciency of GPUs, along with advances in their programmability with OpenCL and CUDA programming models have made them attractive for general-purpose computations across many application domains. Techniques for testing GPU kernels have emerged recently to aid the construction of correct GPU software. However, there exists no means of measuring quality and effectiveness of tests developed for GPU kernels. Traditional coverage criteria over CPU programs is not adequate over GPU kernels as it uses a completely different programming model and the faults encountered may be specific to the GPU architecture.We address this need in this paper and present a framework, CLTestCheck, for assessing quality of test suites developed for OpenCL kernels. The framework has the following capabilities, 1. Measures kernel code coverage using three different coverage metrics that are inspired by faults found in real kernel code, 2. Seeds different types of faults in kernel code and measures fault finding capability of test suite, 3. Simulates different work-group schedules to check for potential deadlocks and data races with a given test suite. We conducted empirical evaluation of CLTestCheck on a collection of 82 publicly available GPU kernels and test suites. We found that CLTestCheck is capable of automatically measuring effectiveness of test suites, in terms of kernel code coverage, fault finding and revealing data races in real OpenCL kernels
Compatibilization of polymer blends : micro and nano scale phase morphologies, interphase characterization, and properties /
No full textCompatibilization of Polymer Blends: Micro and Nano Scale Phase Morphologies, Interphase Characterization and Properties offers a comprehensive approach to the use of compatibilizers in polymer blends, examining both fundamental and advanced knowledge in the field. The book begins by introducing polymer blends, describing thermodynamics, miscibility, and phase separation, and explaining the main concepts of compatibilization. Other sections cover theoretical approaches for nearly compatible blends, incompatible blends, nanofillers, physical compatibilization, reactive compatibilization, morphological and structural characterization, and physico-mechanical characterization. Finally, key application areas are covered, including biomedical applications, packaging and automobile engineering. While this book will be a highly valuable reference source for academics, researchers and postgraduate students interested in polymer blends, it will also be ideal for anyone involved in the fields of polymer science, polymer chemistry, polymer physics, materials science, scientists, R&D professionals, and engineers in involved in the development or engineering of polymer products. Offers detailed and systematic coverage of essential and advanced topics relating to the compatibilization of polymer blends Presents a critical analysis of the effect of compatibilization on morphology and thermal, mechanical, electrical and viscoelastic properties of polymer blends Draws on novel studies and state-of-the-art research, discussing the latest issues and developmentsPrint version record.Compatibilization of Polymer Blends: Micro and Nano Scale Phase Morphologies, Interphase Characterization and Properties offers a comprehensive approach to the use of compatibilizers in polymer blends, examining both fundamental and advanced knowledge in the field. The book begins by introducing polymer blends, describing thermodynamics, miscibility, and phase separation, and explaining the main concepts of compatibilization. Other sections cover theoretical approaches for nearly compatible blends, incompatible blends, nanofillers, physical compatibilization, reactive compatibilization, morphological and structural characterization, and physico-mechanical characterization. Finally, key application areas are covered, including biomedical applications, packaging and automobile engineering. While this book will be a highly valuable reference source for academics, researchers and postgraduate students interested in polymer blends, it will also be ideal for anyone involved in the fields of polymer science, polymer chemistry, polymer physics, materials science, scientists, R&D professionals, and engineers in involved in the development or engineering of polymer products. Offers detailed and systematic coverage of essential and advanced topics relating to the compatibilization of polymer blends Presents a critical analysis of the effect of compatibilization on morphology and thermal, mechanical, electrical and viscoelastic properties of polymer blends Draws on novel studies and state-of-the-art research, discussing the latest issues and developmentsElsevie
COMPARISON IN THE QUALITY OF MOTOR BLOCK BETWEEN ROPIVACAINE AND BUPIVACAINE BOTH COMBINED WITH LIGNOCAINE DURING PERIBULBAR ANAESTHESIA BY SINGLE MEDIAL INJECTION IN CATARACT SURGERY- A COHORT STUDY
No full textA Study to assess the effectiveness of slow paced breathing on pain perception during first stage of labour among primigravida mothers in a selected hospital at Kanyakumari district
Get PDFINTRODUCTION:
Natural childbirth is a profound and powerful human experience which is a mixture of feeling of empowerment and accomplishment. Both pharmacological and non-pharmacological methods are available today and it is known that the non-pharmacological options involve less risk when used in this process. Breathing exercises helps labour women to relax and distract from the painful response.
STATEMENT:
“A study to assess the effectiveness of slow paced breathing on pain perception during first stage of labour among primigravida mothers in a selected hospital at Kanyakumari District.”
OBJECTIVES:
1. To assess the pre-test and post-test level of pain perception during first stage of labor in experimental and control group.
2. To determine the effectiveness of slow paced breathing exercise by comparing the post-test level of pain perception of experimental and control group.
3. To associate pre-test level of pain perception during labour with selected demographic variables.
RESEARCH METHODOLOGY:
The research design adopted for this study was quasi experimental design .The sample size was 60 (30 experimental and 30 control group) and was drawn through purposive sampling technique. The level of labour pain perception was assessed by using Numeric pain rating scale. Slow paced breathing was instructed to practice during contractions for 2 hours during active phase for experimental group. Pre-test was assessed before intervention and Post test done after intervention for both group. The data gathered were analyzed by descriptive and inferential statistical method.
FINDINGS OF THE STUDY:
The mean post-test score on level of pain perception during first stage of labour in experimental group was 1.6, but in control group it was 2.5. The calculated unpaired “t” value was 5.92, which is more than the table value at 5% significance (table value = 2.02). Hence, it was statistically significant at 5% (p < 0.05). It shows that slow paced breathing is effective in reduction of pain perception during first stage of labour. Hence the research hypothesis (H1) is accepted. There is no significant association between demographic variables. Hence the research hypothesis (H2) is rejected.
CONCLUSION:
This study finding revealed that slow paced breathing exercise helps in reducing the level of pain perception among primigravida mothers in the experimental group. So this can be practiced as a Non-pharmacological method to relieve pain perception during labour in various settings
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