6,933 research outputs found
A novel design for an RF MEMS resistive switch on PCB substrate
No full textCopyright @ 2008 Stimulation Action on MEM
Hydrothermal synthesis of ZnZrO2/chitosan (ZnZrO2/CS) nanocomposite for highly sensitive detection of glucose and hydrogen peroxide
No full textIn this work, pure ZnZrO2 and chitosan supported (ZnZrO2/CS) nanocomposite have been synthesized at low coast by hydrothermal method. FT-IR, Micro Raman, PXRD, HR-SEM-EDAX, HR-TEM, AFM, BET and XPS were used to analyze the structural and morphological properties of the fabricated nanocomposites. The fabricated ZnZrO2 and ZnZrO2/CS nanocomposites were measured for their electrocatalytic activity towards glucose and hydrogen peroxide determinations. The ZnZrO2/CS sensor exhibited wide detection range (5 mu M to 5.85 mM), high sensitivity (6.78 mu A mM-1 cm-2), LOD (2.31 mu M), and long-term stability for glucose detection in alkaline solution. Also, as a multifunctional electrochemical sensor, ZnZrO2/CS sensor exhibits excellent sensing ability towards hydrogen peroxide, with a wide dynamic range (20 mu M to 6.85 mM), a high sensitivity (2.22 mu A mM-1 cm-2), and a LOD (2.08 mu M) (S/N = 3). The electrochemical measurement shows that the ZnZrO2/CS sensor has excellent catalytic activity and a much LOD than ZnZrO2. The modified electrode showed excellent anti inter-ference nature. Furthermore, this ZnZrO2/CS electrode was used to detection of glucose and H2O2 in human blood serum and HeLa cells respectively.
Selective determination of selenium(IV) from environmental samples by UV-visible spectrophotometry using O-methoxyphenyl thiourea as a chelating ligand
No full textA selective extraction-spectrophotometric method has been developed for determination of selenium(IV) using O-methoxyphenyl thiourea (OMePT) as a chelating agent. The basis of the proposed method is the spectrophotometric determination of selenium(IV)-OMePT complex obtained after extraction of selenium(IV) from 3.5M hydrochloric acid media using OMePT in chloroform solvent. The complex shows maximum absorbance at 350nm against the reagent blank. The Beer's law was obeyed over the concentration range 5-60 mu gmL(-1) of selenium(IV). The optimum concentration range was 20-50 mu gmL(-1) as evaluated from Ringbom's plot. The molar absorptivity and Sandell's sensitivity of the selenium(IV)-OMePT complex in chloroform were 3.312x10(2) Lmol(-1)cm(-1) and 0.2384 mu gcm(-2), respectively. The composition of selenium(IV)-OMePT complex was 1:2 established from slope ratio method, mole ratio method and Job's continuous variation method. The complex was stable for more than 72h. The interfering effect of various foreign ions was studied and suitable masking agents were used wherever necessary to enhance the selectivity of the developed method. The proposed method was successfully applied for the determination of selenium(IV) from real samples, viz. pharmaceutical formulations, shampoo, vegetable sample, synthetic mixtures and environmental samples. Repetition of the method was checked by finding the relative standard deviation (RSD) for 10 determinations which was 0.35%.The authors are thankful to the University Grants Commission, New Delhi, India, for providing the Teacher Fellowship under Faculty Improvement Programme to one of the authors, Ramesh M. Naval, and financial assistance in the form of M. R. P. to Shashikant R. Kuchekar
Correction to: Visual acuity correlates with multimodal imaging-based categories of central serous chorioretinopathy (Eye, (2021), 10.1038/s41433-021-01788-4)
No full textIn this article the author name Ramesh Venkatesh was incorrectly written as Ramesh Vankatesh. The original article has been corrected
Correction to: Influence of fellow eye on the diagnosis and classification of central serous chorioretinopathy (Graefe's Archive for Clinical and Experimental Ophthalmology, (2021), 10.1007/s00417-021-05435-2)
No full textIn the original published article, one of the author names has been misspelled. “Ramesh Vankatesh” should be “Ramesh Venkatesh” This is being corrected in this publication
Soa papanasam Ramesh & Babu & Subramanian 2020, sp. nov.
No full textSoa papanasam sp. nov. (Figs 1–23) Female. Colour. Head brown without markings, eyes black, antennae pale, ocelli are hyaline with pigmented centripetal crescents (Fig. 3). First segment of maxillary palps pale brown, with segments two to four progressively darker and the last segment almost brownish black. Forewing membrane uniformly brown, hairs of outer margin brown, scales metallic purple, vein dark ferruginous brown except bases of R1 and Rs, pedicel of the radial forks, bases of R4+5 and M1, the base of R, the region between the points of origin of M2 and M3 which are light brown, distal part of Cu1b lighter; hindwing hyaline, veins ferruginous brown. Thorax brown, legs dark yellowish brown, abdomen blackish brown. Morphology. Head: Almost triangular (Fig. 3) with rounded posterior angles, bearing long hairs; eyes large, three ocelli, two on the vertex laterally and one in the middle at the end of frons forming a triangular arrangement, middle ocellus smaller than lateral ones; antennae with 14 flagellomeres, scape and pedicel short and stout, cylindrical flagellar segments long and slender; anterior margin of labrum smoothly rounded. Outer cusp of lacinal apex bilobed, uneven, inner cusp shorter (Fig. 9). Clypeus strongly bulged; first palpomere short, third palpomere a little longer than the first, second and fourth palpomeres longer than third (Fig. 4); second palpomere with single acuminate sensory spine (Fig. 5, arrow mark), P4 boat shaped with 3-4 thin-walled sensilla (Fig. 6). Thorax: Prothorax narrow, collar-like, mesothorax with long hairs. Forewing: Well developed, large, broad, apex rounded, covered with different sizes of scales (Fig. 10). Vein 2Sc present and distinct, sub costa (Sc) vague, further along it joins vein R and branches off in the distal half of the wing as the first in the series Sc’ (base of the pterostigma), R1, R2+3, and R4+5 reaching the wing margin before the wing apex. Base of R present but vague. R1 and Rs fused with short distance, pedicel of the radial cells shorter than R4+5; Rs and M fused over a length; vein M3 arising from where Rs branches off from Rs +M; M2 and M3 broadly away from each other, the distance between their points of origin only slightly shorter than the length of M1; pedicel of the cubital fork short; the branches of Cu1a and Cu1b moderately long, distal part of vein Cu1b indistinct, Cu2 indistinctly demarcated, IA indistinct or absent (Fig. 12). Hindwing: Narrow closed basal cell; anterior margin moderately depressed in middle, distally rounded, Sc basally distinct, but distally faded in to the wing membrane; R and M+Cu not completely joined at the wing base, R1 arising between the origin of Ml and M2 (well proximal to M1); Cu1 arising from the hind margin of the basal cell (Fig. 13). Legs: Coxae of mesothoracic legs interlocked (Figs 7–8). Femora flattened, tibiae long and cylindrical, tarsi three segmented bearing two strong end-spurs, one short and the another one long. Claws with two preapical teeth; pulvillus setiform (Fig. 11). Abdomen: Fusiform, whole abdomen bearing narrow, obtuse and apically rounded scales of different sizes. Genitalia: Gonapophyses external valve rounded, setose, moderately sclerotized (Fig. 17); subgenital plate (Fig. 16) broad, transverse, central margin sclerotised with patch of setose, posterior margin with two pair of long setae; epiproct semi-circular, setose; paraproct with field of six trichobothria, median margin bears long and slender spine (Fig. 18). Spermathecal sac: Spongiform gland complex, spongiform stalk arising lateral side from the duct entrance; appendix invisible, oval, opposite to spongiform gland; duct stalk sclerotised (Fig. 19); spermathecal sheath long and cylindrical (Fig. 20). Measurements (in µm). BL: 1898, FWL: 1821, HWL: 1587, F: 535.82, T: 916.82, t1: 369.94, t2: 80.23, t3: 72.09, ctt1: 14, Mx4: 186.02, f1: 156.60, f2: 143.17, f3: 128.23, f4: 120.36, f5: 63.57, f6: 69.87, f7: 66.06, f8: 67.07, f9: 77.87, f10: 76.06, f11: 83.72, f12: 78.21, f13: 61.91, f14: 12.07, IO: 357.60, D: 264.0, d: 195.0, IO/d: 1.833, PO: 0.738, ioc: 111.83, IO/ioc: 3.19. Male. Colour. Same as the female. Morphology. Similar to female except genitalia. Hypandrium heavily setose, margin gradually narrowed, distally rounded (Fig. 21). Phallosome basal struts tips inwardly curved, internal parameres strongly sclerotised, goblet apodemes arising from the posterior margins of the external rami (Fig. 22). Epiproct semicircular, scattered setose; paraproct with field of six trichobothria, median margin bearing a long and slender spine (Fig. 23). Measurements (in µm). BL: 1791, FWL: 1928, HWL: 1679, F: 538.48, T: 868.57, t1: 347.47, t2: 70.66, t3: 60.98, ctt1: 14, Mx4: 188.65, f1: 139.04, f2: 109.65, f3: 96.00, f4: 89.76, f5: 60.70, f6: 63.96, f7: 49.75, f8: 63.08, f9: 82.31, f10: 90.32, f11: 81.36, f12: 85.60, f13: 79.59, f14: 13.12, IO: 415.30, D: 249.0, d: 142.0, PO: 0.570, ioc: 108.67, IO/ioc: 3.82. Material studied. HOLOTYPE. Female. INDIA. Gouthalaiaru, Karaiyar Beat, Mundanthurai Range, Kalakkad Mundanthurai Tiger Reserve, Tirunelveli District, Tamil Nadu, 8°40’3.576” N, 77°16’ 39.251” E. Altitude 288.8 m, 18.viii.2019, R. Babu. Habitat: Riparian semi evergreen forest. Paratypes: 5 males, 7 females. Same data as the holotype; 4 males, 3 females. Venniyar, riparian semi evergreen forest upstream of Suruli waterfalls, Cumbam East Range, Meghamalai Wildlife Sanctuary, Theni District, Tamil Nadu, India, 9°39’16.704” N, 77°18’ 20.412” E, Altitude 483.4 m, 27.ii.2019, R. Babu (for distribution see Fig. 24). Holotype (Reg. No. I /PSO/37), 7 male paratypes, and 8 female paratypes (Reg. No. I /PSO/38-45) deposited at the Southern Regional Centre, Zoological Survey of India, Chennai. Paratypes of both sexes will be deposited at the Central Entomological Laboratory, Zoological Survey of India, Kolkata. Etymology. The species epithet refers to the Papanasam dam located close to the type locality.Published as part of Ramesh, Gurusamy, Babu, Rajappa & Subramanian, Kumarapuram A., 2020, New species of Soa Enderlein, 1904 (Psocodea: ' Psocoptera': Lepidopsocidae) from the Western Ghats of India, pp. 383-392 in Zootaxa 4881 (2) on pages 384-391, DOI: 10.11646/zootaxa.4881.2.11, http://zenodo.org/record/428358
Rapid Yet Robust Continuous Delivery of Software for Disaster Management Scenarios
No full textThere are situations when you need to accelerate the software development lifecycle. When the state of Kerala in India was devastated by severe flooding in 2018, we faced such a situation while we were building applications for managing rescue and relief operations during floods. We present a variant of DevOps called Rapid-DevOps to meet the need for accelerated release cycles while maintaining the required quality and stability. We describe the cost-benefit analysis to justify its use and the factors in our development process that enabled its successful adoption
Informetrics on M. N. Srinivas
No full textM. N. Srinivas, the well known sociologist is widely recognised as architect of modern Indian sociology and social anthropology. His publications have been analysed by year, domain, authorship pattern, channels of communication used. Keywords, etc. The results indicate that the papers published by him are of a nature that qualify him to be a 'role model' for the younger generations to emulate.
By the end of 1995, Srinivas had to his credit 144 papers which, included 33 broad papers in sociology and anthropology; 18 papers in social change; 28 papers in village studies; 12 papers on religion; 17 papers on caste and 36 papers of general popular interest. The periods 1958-61 and 1974-77, when Srinivas was 38-41 and 58-61 years old. were his most productive periods with highest publication activity
Pompano farming at Vethalai using low-cost cages: Technology demonstration initiative by Mandapam RC
No full textAn artisanal type of cage was fabricated at Mandapam Regional
Centre with 6×6 m outer and 5×5 m inner square frame,
which is made of 50mm GI pipe for farming demonstrations involving
local fishermen at Vethalai village, Ramnad District, Tamil Nadu.The ongoing pompano farming
demonstration in an artisanal type of sea cages is a way forward for
the spread of mariculture in India.
(Reported by G. Gopakumar,
A. K. Abdul Nazar, R. Jayakumar, G. Tamilmani,
M. Sakthivel, C. Kalidas, P. Ramesh Kumar &
Johnson B., Mandapam Regional Centre
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