11 research outputs found
Reporting a new ciliate, Hemiurosomoida linea n.sp. from a freshwater pond of Rajghat, Delhi, India
No full textHemiurosomoida was established as a new genus by Singh and Kamra in 2015 based on its morphology, morphogenesis and molecular analysis. Based on their morphology, the members of this genus were earlier erroneously placed in the genus Oxytricha, then shifted to another genus Urosomoida, before establishing the new genus Hemiurosomoida. However, a detailed molecular analysis based on small subunit ribosomal RNA (SSU rRNA) showed that the members of this genus are rather placed far apart from the other two genera in the phylogenetic tree. Therefore, they are now placed in a new genus Hemiurosomoida. To date, four species of this genus have been reported, viz. H. longa, H. warreni, H. tibetensis and H. koreana. In the present investigation, a new freshwater species, Hemiurosomoida linea n. sp. was reported from a freshwater pond located in Rajghat, Delhi, India. Diagnostic features of H. linea include- a flexible body with an average size of 81x18 µm (protargol stained cells); narrowly elongated cells with a rounded anterior end and a tapering posterior end; the presence of 2 macronuclear nodules and 2 micronuclei; the presence of only 17 Frontal-Ventral-Transverse (F1-8, V1-5, T1-4) cirri, the transverse cirri (T1-4) being arranged in a linear row; four dorsal rows of bristles (DK1-3 and DM1); 2 caudal cirri; an average of 19 adoral membranelles; 17 right marginal and 17 left marginal cirri; no fragmentation of DP3; a flat and narrow buccal cavity, and undulating membranes (UMs) in typical Oxytricha pattern. Thus, this study has unravelled and confirmed that H. linea was a new species and helped expand the knowledge base of ciliate biodiversity in India.
An Integrated Kirchhoff Element by Galerkin Method for Free Vibration Analysis of Plates on Elastic Foundation
No full textAbstractPlates resting on elastic foundations have many engineering applications, especially in the area of structural engineering. Conventionally these foundation systems can be analyzed using regular plate bending element and discrete soil springs. The present work aims an element formulation which is suitable for dynamic analysis of such elastic foundation systems without the use of explicit discrete soil springs. The scope of the work includes free vibration analysis of an isotropic rectangular plate on elastic foundation with various boundary conditions for different thickness and varying properties of foundation. In this paper, finite element modelling has been done for a rectangular isotropic plate by using a four nodded Kirchhoff rectangular element having three degrees of freedom per node, combined with Winkler model of elastic foundation. Here the formulation has been carried out by integrating the properties of the rectangular plate with properties of elastic foundation using Galerkin weighted residual approach instead of the common methods in use like potential energy approach. Numerical modelling has been carried out by developing a MATLAB code and the results of free vibration analysis obtained are in good agreement with the results reported in earlier studies
Al203 thin films on Silicon and Germanium substrates for CMOS and flash memory applications
No full textElectron beam induced deposition of silacyclohexane and dichlorosilacyclohexane: the role of dissociative ionization and dissociative electron attachment in the deposition process
No full textWe present first experiments on electron beam induced deposition of silacyclohexane (SCH) and dichlorosilacyclohexane (DCSCH) under a focused high-energy electron beam (FEBID). We compare the deposition dynamics observed when growing pillars of high aspect ratio from these compounds and we compare the proximity effect observed for these compounds. The two precursors show similar behaviour with regards to fragmentation through dissociative ionization in the gas phase under single-collision conditions. However, while DCSCH shows appreciable cross sections with regards to dissociative electron attachment, SCH is inert with respect to this process. We discuss our deposition experiments in context of the efficiency of these different electron-induced fragmentation processes. With regards to the deposition dynamics, we observe a substantially faster growth from DCSCH and a higher saturation diameter when growing pillars with high aspect ratio. However, both compounds show similar behaviour with regards to the proximity effect. With regards to the composition of the deposits, we observe that the C/Si ratio is similar for both compounds and in both cases close to the initial molecular stoichiometry. The oxygen content in the DCSCH deposits is about double that of the SCH deposits. Only marginal chlorine is observed in the deposits of from DCSCH. We discuss these observations in context of potential approaches for Si deposition
An uncommon association of familial partial lipodystrophy, dilated cardiomyopathy, and conduction system disease
No full textA 46-year-old African American woman presented with severe respiratory distress requiring intubation and was diagnosed
with nonischemic cardiomyopathy. She had the typical phenotype of familial partial lipodystrophy 2 (FPLD2). Sequence analysis
of LMNA gene showed a heterozygous missense mutation at exon 8 (c.1444C>T) causing amino acid change, p.R482W. She
later developed severe coronary artery disease requiring multiple percutaneous coronary interventions and coronary artery
bypass surgery. She was later diagnosed with diabetes, primary hyperparathyroidism, and euthyroid multinodular goiter.
She had sinus nodal and atrioventricular nodal disease and had an implantable cardioverter defibrillator implantation due to
persistent left ventricular dysfunction. The device eroded through the skin few months after implantation and needed a reimplant on the contralateral side. She had atrial flutter requiring ablation. This patient with FPLD2 had most of the reported
cardiac complications of FPLD2. This case is presented to improve the awareness of the presentation of this disease among
cardiologists and internists.The author(s) received no financial support for the research, authorship, and/or publication of this article.S
Focused Electron Beam Induced Deposition of 1,1-dichloro-1-silacyclohexane, silacyclohexane and 1,3,5-trisilacyclohexane: Preliminary study on the role of low energy secondary electrons in the deposition process
No full textTo study the potential role of low energy secondary electrons in focused electron beam induced deposition (FEBID) we have studied FEBID using 1,1-dichloro-1-silacyclohexane, silacyclohexane and 1,3,5-trisilacyclohexane. While the first of these compounds shows appreciable cross sections for dissociative electron attachment (DEA) in the gas phase, DEA is not observed for the latter two. Dissociative ionization, on the other hand is a fairly efficient decomposition path for all three compounds. The performance of these compounds in FEBID is compared with their decomposition through low energy electrons in the gas phase and discussed in context to the role of DEA and DI in FEBID.ImPhys/Imaging PhysicsApplied Science
Stock structure analysis of ‘Aristeus alcocki Ramadan, 1938 (Decapoda: Aristeidae)’ in the Indian coast with truss network morphometrics
No full textAristeus alcocki Ramadan, 1938 is a deep sea penaeid shrimp that forms a major commercial fishery in the Indian coast. However, the spawning population of this species along the Indian coast is poorly known. To study this, stock structure of A. alcocki using truss morphometry was employed. A total of 1842 matured specimens were collected from five geographical locations (Tuticorin (SET), Chennai (SEC), Nagapattianam (SEN), Sakthikulangara (SWS), and Kalamuku (SWK)) along the Indian coast. Thirty-nine truss distances were extracted from each specimen and analyzed by multivariate methods via principal component analysis (PCA), discriminant functions (DF) and hierarchical cluster analysis. The results of PCA analysis indicate that the first two components cumulatively explained >70% (female: 72.1%; male: 71.5%) of the total morphometric variation. Stepwise discriminant function analysis indicated abdominal variables significantly discriminated the populations at different locations. The results clustered the five samples into a minimum of two groups, group-I included the samples from SWK while rest of the samples clustered in group-II. Morphometric variation between the groups was significant for each sex. Significant differences between the groups may be attributed to geographical and environmental conditions suggesting separate management strategies for the resource sustainability.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
Clinical spectrum and management of dystonia in patients with Japanese encephalitis: A systematic review
No full textAbstract Background Japanese encephalitis (JE) is a potentially fatal viral infection with a wide range of manifestations and can also present with a variety of movement disorders (MD) including dystonia. Dystonic features in JE are uncommon. Here, we have tried to summarize the clinical features and management of dystonia among JE patients with a comprehensive literature search. Methods Various databases, including PubMed, Embase, and Google Scholar, were searched against the predefined criteria using suitable keywords combination and boolean operations. Relevant information from observational and case studies was extracted according to the author, dystonic features, radiological changes in the brain scans, treatment options, and outcome wherever provided. Result We identified 19 studies with a total of 1547 JE patients, the diagnosis of which was confirmed by IgM detection in serum and/or cerebrospinal fluid in the majority of the patients (88.62%). 234 (15.13%) of JE patients had dystonia with several types of focal dystonia being present in 131 (55.98%) either alone or in combination. Neuroimaging showed predominant involvement of thalami, basal ganglia, and brainstem. Oral medications including anticholinergics, GABA agonists, and benzodiazepines followed by botulinum toxin were the most common treatment modalities. Conclusion Dystonia can be a disabling consequence of JE, and various available medical therapies can significantly improve the quality of life. Owing to insufficient studies on the assessment of dystonia associated with JE, longitudinal studies with a larger number of patients are warranted to further clarify the clinical course, treatment, and outcome of dystonia
Negative ion formation through dissociative electron attachment to the group IV tetrachlorides: Carbon tetrachloride, silicon tetrachloride and germanium tetrachloride
No full text© 2018 Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license:http://creativecommons.org/licenses/by-nc-nd/4.0/
This author accepted manuscript is made available following 24 month embargo from date of publication (Jan 2018) in accordance with the publisher’s archiving policyThe current contribution constitutes the third and final part of our trilogy of papers on electron attachment reactions of the group IV tetrahalides; XY4 (X = C, Si, Ge and Y = F, Cl, Br). In this context we extend our previous studies on XF4 and XBr4 and report results for electron attachment to the tetrachlorides: CCl4, SiCl4 and GeCl4 in the incident electron energy range from about 0 to 10 eV. At the same time we give a summary of the currently available literature on electron interactions with those latter compounds. Upon electron attachment the formation of Cl−, XCl3−, XCl2− and Cl2− is observed from all the tetrachlorides, and additionally the molecular anion SiCl4− is observed from SiCl4. The main DEA contributions are observed through narrow, threshold peaks (at 0 eV) and we attribute these features to single particle resonances associated with the a1 symmetry LUMOs of those compounds. Contributions from another low-lying resonance, which we assign as a 2T2 shape resonance associated with the t2 symmetry LUMO+1, is also observed in the ion yield curves for all the tetrachlorides. The energy of the peak position of those contributions varies in the range from about 1 to 2 eV, depending on the compound and the fragment formed. In addition to these low energy contributions, higher energy, fairly broad, features are observed for all the tetrachlorides. These contributions exhibit a peak in the energy range between 5 and 8 eV, again depending on the compound and the fragment formed. Further to the experimental data, we report DFT and coupled cluster calculations on the thermochemical thresholds for the individual fragments as well as the respective bond dissociation energies and electron affinities. These calculated values are compared with the experimental appearance energies and literature values, where they are available
Factors associated with effects of COVID-19 vaccine among adults in Malaysia
No full textIntroduction: Globally, the needs for more focused research to understand the effects of COVID-19 vaccines among the population to verify the previous research and generate more reliable data. Therefore, this cross-sectional study was aimed to identify the factors associated with the effects of COVID-19 vaccination among adults in Malaysia. Methods: Malaysian people aged 18 and up were enrolled in a cross-sectional online survey. For data collection, a Google form was used to design an online questionnaire which was distributed through social media and in person by the author. Results: A total of 446 responses were analyzed. 58% participants received Pfizer BioNTech Covid 19 vaccine followed by Sinovac (21%) and AstraZeneca (16%). The most reported effect was local reaction pain, swelling and redness at the site of injection with 54.3% of participants. It was seen more in Pfizer BioNTech (56.8%) and AstraZeneca (57.1%) recipients in comparison to Sinovac recipients (42.9%), but this difference was not significant (x2=3.453; p-value=0.315). Tiredness/fatigue was the next most reported effect 51.3% by participants. The other more frequently reported effects were body pain (43.3%), muscle pain (41%), fever (41%) and headache (33%) respectively, which are significantly associated with the type of vaccine. 
