Generalized Warburg impedance on realistic self-affine fractals: comparative study of statistically corrugated and isotropic roughness

We analyse the problem of impedance for a diffusion controlled charge transfer process across an irregular interface. These interfacial irregularities are characterized as two class of random fractals: (i) a statistically isotropic self-affine fractals and (ii) a statistically corrugated self-affine fractals. The information about the realistic fractal surface roughness has been introduced through the band-limited power-law power spectrum over limited wave numbers. The details of power spectrum of such roughness can be characterized in term of four fractal morphological parameters, viz. fractal dimension (DH), lower (ℓ), and upper (L) cut-off length scales of fractality, and the proportionality factor (μ) of power spectrum. Theoretical results are analysed for the impedance of such rough electrode as well as the effect of statistical symmetries of roughness. Impedance response for irregular interface is simplified through expansion over intermediate frequencies. This intermediate frequency expansion with sufficient number of terms offers a good approximation over all frequency regimes. The Nyquist plots of impedance show the strong dependency mainly on three surface morphological parameters i.e. DH, ℓ and μ. We can say that our theoretical results also provide an alternative explanation for the exponent in intermediate frequency power-law form

Electrode disorder, electrochemical processes and governing length scales

Surface of a solid electrode ubiquitously possesses morphological and energetic disorders, and therefore it greatly influences their thermodynamics, kinetics and transport properties. Also, the anomalies in an electrochemical response are governed by the synergistic effect of the morphological and phenomenological lengths. For theoretical understanding of disordered systems, it becomes mandatory to characterize these length scales, and their dependence on electrochemical and morphological characteristics. In this review, we mainly focus on two aspects: (1) statistical characterization of electrode surface using FE-SEM micrographs and electrochemical microscopic area, and (2) the physical significance of various length scales arising in theoretical models and electrode surface topography. Finally, a common scale is generated to show the synergistic effects of morphological and phenomenological length scales in disordered electrochemical system

MANAGEMENT OF BUERGER'S DISEASE THROUGH AYURVEDA- A CASE REPORT

The present case report was about a 50 year-old-male who was diagnosed with Buerger’s disease which is a generalised occlusive vascular diseaseaffecting predominantly males with special predilection to involve the lowerextremities. He presented with complaint of unhealed ulcerations with pain andburning sensation in his right sole for 6 months but not getting satisfactoryrelief even after using conventional medications and advised to get doneamputation. He visited the All India institute of Ayurveda and was treated fortwo months with a combination of Ayurvedic medicines and leech therapy whichshowed significant improvement in patients condition and eventually norecurrence was observed, ulcer healed completely with slight discolouration. Thisshows the effectiveness of Ayurvedic treatment including internal medicinesadministration and leech therapy in preventing amputation and treating othersymptoms which may be useful for clinical practices

Generalization of Linearized Gouy-Chapman-Stern Model of Electric Double Layer for Nanostructured and Porous Electrodes: Deterministic and Stochastic Morphology

We generalize linearized Gouy-Chapman-Stern theory of electric double layer for nanostructured and morphologically disordered electrodes. Equation for capacitance is obtained using linear Gouy-Chapman (GC) or Debye-$\rm{\ddot{u}}$ckel equation for potential near complex electrode/electrolyte interface. The effect of surface morphology of an electrode on electric double layer (EDL) is obtained using "multiple scattering formalism" in surface curvature. The result for capacitance is expressed in terms of the ratio of Gouy screening length and the local principal radii of curvature of surface. We also include a contribution of compact layer, which is significant in overall prediction of capacitance. Our general results are analyzed in details for two special morphologies of electrodes, i.e. "nanoporous membrane" and "forest of nanopillars". Variations of local shapes and global size variations due to residual randomness in morphology are accounted as curvature fluctuations over a reference shape element. Particularly, the theory shows that the presence of geometrical fluctuations in porous systems causes enhanced dependence of capacitance on mean pore sizes and suppresses the magnitude of capacitance. Theory emphasizes a strong influence of overall morphology and its disorder on capacitance. Finally, our predictions are in reasonable agreement with recent experimental measurements on supercapacitive mesoporous systems

Contemporary spatial association of genetic diversity determinants in Asian Dipterocarps: a systematic review

Considering the research gaps and areas to be prioritized specifically in the forestry research sector with stress given on conservation genetics and tree improvement, we make an effort to understand the spatial patterns and identify the key determinants, which produce major effects on genetic diversity of Asian Dipterocarps. This review focuses on identifying patterns and establishing relationships between genecological parameters derived on the basis of molecular markers with factors, such as geographical range, vertical profile and IUCN categories along with recognizing research gaps pertaining to operational forestry and terrestrial ecosystems. Corresponding to 47 research papers, meta-analysis of 50 species under subfamily Dipterocarpoideae revealed significant differences in genetic parameters, namely expected heterozygosity (HE) and number of alleles per locus (NA), for most genera and factors. These parameters showed significant correlations with vertical strata (rk=-0.241; p<0.05) and altitude (rs=0.283; p<0.01). However, on the basis of co-dominant and dominant markers, the parameters exhibited contrasting results for the species’ characteristics. Further, pollen exchange and seed dispersal predominantly explained the genetic variations among the contributing factors, generally believed to be correlated with vertical strata and geographical range of the species. Conclusively, two major clusters were formed through principal component analysis (PCA), where HE and NA were the main deciding factors. Anthropogenic interferences, viz. forest fragmentation and deforestation found to be subsidising major impacts, which increase inbreeding and genetic drift, causing the loss of rare alleles and consequently, decreasing genetic variation. The study emphasizes the importance of genecological conservation and access to diverse genetic resources information, which will ensure global forest conservation and climate change mitigation network for sustainable development

Conjoined Stent Technique for Radiation Induced Long Segment Carotid Stenosis and Pseudoaneurysm

Radiation induced carotid stenosis (RICS) is known but challenging complication of head and neck irradiation. Endovascular revascularization is preferred treatment modality than surgical revascularization. Sometimes endovascular treatment may be difficult in view of long segment of stenosis and associated pseudoaneurysm. We report a unique technique of carotid stenting named as "conjoined stent technique" in a challenging case of RICS with long segment of stenosis and pseudoaneurysm. In this technique we overlapped distal end of one stent with proximal end of second stent to occlude pseudoaneurysm. "Conjoined stent technique" may be viable option in case of long segment of RICS with associated pseudoaneurysm and alternative to flow diverters in extracranial carotid pseudoaneurysm

Prevalence of depression and health related quality of life among patients with diabetes mellitus and hypertension attending a secondary care hospital in district Faridabad, Haryana

Background:  Diabetes mellitus (DM) and hypertension (HT) have significant effect on the mental health of the patient. and. We aimed to estimate the prevalence of depression, and the quality of life among patients with diabetes mellitus and hypertension who attended a secondary care hospital. Methods: A cross-sectional study was carried out among 618 patients who had DM and/or HT.  PHQ-9 and WHO-BREF QOL questionnaire were administered to assess depression and health related quality of life respectively. Results: More than 2/3rd of patients had depression. Among those who had depression, nearly half (46%) had moderate depression and 2.1% had severe depression. The proportion of severely depressed patients was higher in diabetes mellitus group compared to the hypertension group.   Patients that were depressed had poorer quality of life compared to non-depressed, and the difference was statistically significant. Conclusion: Patients with diabetes mellitus and hypertension may be screened for depression and managed accordingly