Ultra-dry air plasma treatment for enhancing the dielectric properties of Al2O3-GPTMS-PMMA hybrid dielectric gate layers in a-IGZO TFT applications.

We assessed the effects of ultra dry-air plasma surface treatments on the properties of Al2O3-GPTMS-PMMA hybrid dielectric layers for applications to high-performance amorphous Indium Gallium Zinc Oxide (a-IGZO) thin film transistors (TFTs). The hybrid layers were deposited by an easy dip coating sol-gel process at low temperature and then treated with dry-air plasma at 1, 2 and 3 consecutive cycles. Their properties were analyzed as a function of the number of plasma cycles and contrasted with those of the untreated ones. The dielectric characteristics of the hybrid layers were determined from I-V and C-f measurements performed on metal-insulator-metal and metal-insulator-semiconductor devices. The results show that the plasma treatments increase the surface energy and wettability of the hybrid films. There is also a reduction of the OH groups and oxygen vacancies in the hybrid network improving the dielectric properties. The incorporation of nitrogen into the hybrid films surface is also observed. The plasma-treated hybrid dielectric layers were applied as dielectric gate in the fabrication of a-IGZO TFTs. The best electrical performance of the fabricated TFTs was achieved with the 3 cycles plasma-treated hybrid dielectric gate, showing high mobility, 29.3 cm2 V-1 s-1, low threshold voltage, 2.9 V, high I ON/OFF current ratio, 106, and low subthreshold swing of 0.42 V dec-1.

Development and feasibility of yoga therapy module for out-patients with depression in India.

CONTEXT: Evidence suggests that certain yoga practices are useful in the management of depression. To the best of our knowledge, there has been no study that deals with the formulation of a yoga module for the particular clinical features of depression. AIM: The main aim of our study was to develop a comprehensive yoga therapy module targeting specific clinical features of depression. SETTINGS AND DESIGN: Specific yoga practices were matched for clinical features of depression based on a thorough literature review. A yoga program was developed, which consisted of Suksmavyayama, (loosening exercises), äsanas (postures), relaxation techniques, Pranayama (breathing exercises) and chanting meditation to be taught in a 2 week period. MATERIALS AND METHODS: A structured questionnaire was developed for validation from nine experienced yoga professionals. The final version of yoga therapy module was pilot-tested on seven patients (five females) with depression recruited from outpatient service of National Institute of Mental Health and Neuro Sciences, Bangalore. RESULTS: The final yoga therapy module had those practices that received a score of three or more (moderately/very much/extremely useful) from all responders. Six out of nine (>65%) experts suggested Suksmavyayama should be included. Five out of nine experts opined that training with 10 sessions (over 2 weeks) is rather short. All experts opined that the module is easy to teach, learn and practice. At the pilot stage, the five patients who completed the module reported more than 80% satisfaction about the yoga practices and how the yoga was taught. Severity of depression substantially reduced at both 1 and 3 months follow-up. CONCLUSION: The developed comprehensive yoga therapy module was validated by experts in the field and was found to be feasible and useful in patients with depression.

Positive antidepressant effects of generic yoga in depressive out-patients: A comparative study.

CONTEXT: Therapeutic effects in depression of yoga adopted from different schools have been demonstrated. The efficacy of a generic module of yoga on depressed patients has not yet been tested in the literature. AIMS: The study was aimed to compare the therapeutic effect of a generic yoga module with antidepressant drugs in non-suicidal out-patients of major depression attending a psychiatric hospital. SETTINGS AND DESIGN: The study was outpatient-based using an open-labeled design. MATERIALS AND METHODS: A total of 137 out-patients of depressive disorders received one of the three treatments as they chose - yoga-only, drugs-only or both. The yoga was taught by a trained yoga physician for over a month in spaced sessions totaling at least 12. Patients were assessed before treatment, after 1 and 3 months on depression and Clinical Global Impression Scales. Out of 137, 58 patients completed the study period with all assessments. RESULTS: Patients in the three arms of treatment were comparable on demographic and clinical variables. Patients in all three arms of treatment obtained a reduction in depression scores as well as clinical severity. However, both yoga groups (with or without drugs) were significantly better than the drugs-only group. Higher proportion of patients remitted in the yoga groups compared with the drugs-only group. No untoward events were spontaneously reported in the yoga-treated patients. CONCLUSION: Within the limitations of this study, it can be concluded that the findings support a case for prescribing yoga as taught in the study in depressive non-suicidal out-patients.

Low serum brain derived neurotrophic factor in non-suicidal out-patients with depression: Relation to depression scores.

CONTEXT: Low brain-derived neurotrophic factor (BDNF) has been implicated in the pathophysiology of depression. The relation between BDNF and severity of depression has been investigated. AIMS: In this study, we aimed to measured serum BDNF levels in never-treated non-suicidal out-patients with depression and relate this to the severity of depression. SETTINGS AND DESIGN: This study was conducted in an out-patient setting in a tertiary care psychiatric hospital on consenting depressed patients. MATERIALS AND METHODS: Forty three (19 females) antidepressant-naive out-patients with depression, aged between 18 and 55 years and 24 (13 females) age-matched healthy volunteers gave consent for the study. Serum BDNF levels were assayed by using the sandwich enzyme-linked immunosorbent assay method on morning serum samples before starting treatment. These were compared between patients and controls using independent sample t-test. Pearson's correlation coefficient was used to assess the association between baseline BDNF and Hamilton depression rating scale (HDRS). RESULTS: Serum BDNF was significantly lower in patients with depression (mean±standard deviation (SD)=18.59±4.9 ng/ml) than in healthy volunteers (mean±SD=23.6±5.6 ng/ml; P=0.001). There was a significant negative correlation between the HDRS total scores and BDNF levels (P=0.04), indicating that more severely depressed patients had lower BDNF scores. CONCLUSIONS: Serum BDNF level is lower in non-suicidal out-patients with depression. The inverse correlation between ratings of depression and BDNF levels suggests possible relationship between depression, (role of illness on) BDNF levels and neuroplasticity thereof.

Positive therapeutic and neurotropic effects of yoga in depression: A comparative study.

CONTEXT: Therapeutic effect of yoga in depression is recognized. Neuroplastic effects of antidepressant therapies are inferred by elevations in brain-derived neurotrophic factor (BDNF). Role of yoga in both these effects has not been studied. MATERIALS AND METHODS: Non-suicidal, consecutive out-patients of depression were offered yoga either alone or with antidepressants. The depression severity was rated on Hamilton Depression Rating Scale (HDRS) before and at 3 months. Serum BDNF levels were measured at the same time points. Repeated-measures analysis of variance was performed to look at change across groups with respect to HDRS scores and BDNF levels over 3 months of follow-up. Relationship between change in serum BDNF levels and change in HDRS scores was assessed using the Pearson's correlation coefficient. RESULTS: Both yoga groups were better than drugs-only group with respect to reduction in HDRS scores. Serum BDNF rose in the total sample in the 3-month period. This was not, however, different across treatment groups. There was a significant positive correlation between fall in HDRS and rise in serum BDNF levels in yoga-only group (r=0.702; P=0.001), but not in those receiving yoga and antidepressants or antidepressants-alone. CONCLUSIONS: Neuroplastic mechanisms may be related to the therapeutic mechanisms of yoga in depression.

Cortisol and antidepressant effects of yoga.

CONTEXT: Hypercortisolemia is well-known in depression and yoga has been demonstrated earlier to reduce the parameters of stress, including cortisol levels. AIM: We aimed to find the role of yoga as an antidepressant as well as its action on lowering the serum cortisol levels. SETTINGS AND DESIGN: An open-labeled study consisting of three groups (yoga alone, yoga along with antidepressant medication and antidepressant medication alone) was conducted at a tertiary care psychiatry hospital. METHODOLOGY: Out-patient depressives who were not suicidal were offered yoga as a possible antidepressant therapy. A validated yoga module was used as therapy taught over a month and to be practiced at home daily. Patients were free to choose the drugs if their psychiatrist advised. Patients (n=54) were rated on Hamilton Depression Rating Scale (HDRS) with serum cortisol measurements at baseline and after 3 months. In 54 patients, assessments and blood test results were both available. 19 each received yoga alone or with drugs and 16 received drugs only. Healthy comparison subjects (n=18) too underwent morning cortisol measurements once. RESULTS: Serum cortisol was higher in depressives compared with controls. In the total sample, the cortisol level dropped significantly at the end of treatment. More patients in the yoga groups had a drop in cortisol levels as compared to drug-only group. In the yoga-only group, the cortisol drop correlated with the drop in HDRS score (antidepressant effect). CONCLUSION: The findings support that yoga may act at the level of the hypothalamus by its 'anti-stress' effects (reducing the cortisol), to bring about relief in depression.

Antibody response to 146S particle, 12S protein subunit and isolated VP1 polypeptide of foot-and-mouth disease virus type Asia-1.

The antibody response to foot-and-mouth disease virus (FMDV) antigens of type Asia-1 in guinea-pigs was studied by micro-serum neutralization test (MSNT) and enzyme-linked immunosorbent assay (ELISA). One inoculation of as little as 1 microgram of binary ethyleneimine (BEI)-inactivated 146S virus particles in guinea-pigs elicited enough neutralizing antibodies to protect them against challenge with virulent virus. However, one inoculation of live 146S virus particles elicited higher levels of neutralizing antibodies in guinea-pigs than that of inactivated 146S particles. One inoculation of 12S protein subunits in guinea-pigs elicited only non-neutralizing anti-12S antibodies detected by ELISA. Similarly, non-neutralizing anti-VP1 antibodies were detected by ELISA after one inoculation of VP1. However, multiple inoculations of 12S or VP1 elicited measurable neutralizing antibodies in guinea-pigs that protected them against challenge.

Bone imaging with energy-weighted acquisition.

Scattered radiation is the principal cause of image degradation in nuclear imaging. Several strategies have been tried to reduce the contribution of scattered radiation in nuclear imaging including energy-weighted acquisition (EWA). EWA reduces the effect of scattered radiation by assigning a positive value for primary photon and a negative value for scattered radiation. The effect of EWA for lesion detection on bone scans was compared with a standard acquisition protocol, referred to as normal weighted acquisition (NWA), in 97 patients by simultaneously acquiring bone scan images using both protocols. EWA identified 436 lesions (mean 4.49) and NWA 415 lesions (mean 4.28). There was no statistical difference in the number of lesions identified nor in the intensity of uptake in these lesions when assessed qualitatively. Therefore, it is concluded that EWA does not enhance lesion detection on 99mTc bone scans.

Mucinous adenocarcinoma of the pancreas.

The authors report a patient with mucinous adenocarcinoma of the pancreas with multiple cystic spaces, lined with malignant columnar cells and papillary formation; adjacent pancreatic tissue shows chronic pancreatitis. This is an unusual case report.

Diagnostic yield from 231 autopsies in a community hospital.

Autopsy reports of 231 adult autopsies were examined for clinically unexpected diagnoses. Analysis of data showed that 97 of 188 autopsy diagnoses were clinically unexpected. The diagnosis of pulmonary embolism was clinically the most frequently missed diagnosis relative to its actual occurrence. Also noted was that the proportion of cases with unexpected diagnoses increased from 1983 to 1987.

Lactic acidosis and hypoglycemia: experimental evidence to show lactate prevents insulin induced seizures in rats.

A 52-year-old man with lactic acidosis and severe hypoglycemia was fully conscious and alert with a blood sugar of 8 mgs%. We believe normal level of consciousness was maintained due to the presence of hyperlactatemia. We show experimental evidence to suggest that lactate prevents the development of insulin-induced seizures in rats.