1,722,165 research outputs found
A Selective and Sensitive Chromogenic and Fluorogenic Detection of a Sulfur Mustard Simulant
Full text linkA simple and highly selective chromogenic and fluorogenic detection of sulfur mustard (SM) simulants is reported. Dithiol 1, in the presence and absence of a mustard simulant behaves differently toward a squaraine dye (SQ), and thus provides a visual and spectroscopic signal for mustard gas. The sensor responds to the SM simulant, but not to the O-analog of mustard stimulant or nerve agent mimics and other electrophilic agents. The visual and fluorescent detection with less than 50 mu M of SM simulant shows good sensitivity. The utility of the sensor was demonstrated by analysis of SM simulant on surfaces, in soil, and in the gas phase.Office of Naval Research N00014-09-1-1087Welch Foundation F-1151Department of Science and Technology, IndiaDefense Research and Development Organization, IndiaChemistr
Rediscovery and lectotypification of Scurrula stocksii (Loranthaceae): a rare and endemic species of Maharashtra, India
No full textChandore, Arun Nivrutti, Gosavi, Kumar Vinod Chhotupuri, Kambale, Sharad Suresh (2023): Rediscovery and lectotypification of Scurrula stocksii (Loranthaceae): a rare and endemic species of Maharashtra, India. Phytotaxa 589 (2): 198-202, DOI: 10.11646/phytotaxa.589.2.7, URL: http://dx.doi.org/10.11646/phytotaxa.589.2.
FIGURE 2 in Rediscovery and lectotypification of Scurrula stocksii (Loranthaceae): a rare and endemic species of Maharashtra, India
No full textFIGURE 2. Herbarium specimen of Scurrula stocksii (Hook f.) Danser: collected from Hativale area of Rajapur, Ratnagiri district of Maharashtra. A.N. Chandore ANC-2003 (SUK).Published as part of Chandore, Arun Nivrutti, Gosavi, Kumar Vinod Chhotupuri & Kambale, Sharad Suresh, 2023, Rediscovery and lectotypification of Scurrula stocksii (Loranthaceae): a rare and endemic species of Maharashtra, India, pp. 198-202 in Phytotaxa 589 (2) on page 200, DOI: 10.11646/phytotaxa.589.2.7, http://zenodo.org/record/776242
On the improvement of the thermal performance of longitudinally finned parabolic trough solar receivers
No full textThe parabolic trough collector remains one of the most extensively deployed technologies for concentrating solar power and heating. Enhancing the thermal performance of the receiver tube, which is its core component, is critical for improving overall system efficiency. Longitudinal fins represent a simple and cost-effective method for augmenting heat transfer within the receiver. However, due to the inherently non-uniform heat flux distribution along the receiver surface, the positioning of these fins significantly influences thermal performance, but this aspect has not been thoroughly explored in the literature. This study systematically investigates the effects of the location, as well as height and number of fins, and clarifies the distinct roles of fins positioned on the different halves of the receiver tube. Furthermore, a novel performance evaluation metric is proposed, offering a more representative basis for comparison than the conventional approach commonly adopted in the literature. Computational fluid dynamics simulations are employed to assess the thermal performance of receivers equipped with rectangular-profile fins across a range of Reynolds numbers from 20,000 to 60,000. The numerical model is validated against experimental data from the literature. Results from configurations with 2, 4, 6, and 8 fins reveal that optimal thermal management is achieved by placing shorter fins in regions of higher heat flux and longer fins in areas of lower heat flux. The most effective configuration yields a 45.6% enhancement in the overall Nusselt number and an 18.0% reduction in heat losses compared to a smooth receiver. These findings offer valuable insights for the design of more efficient parabolic trough receivers, contributing to improved thermal performance and reduced risk of tube deformation and failure in linear collectors
EFFECT OF HEIGHT AND POSITION OF INNER RECTANGULAR LONGITUDINAL FINS IN PARABOLIC TROUGH SOLAR RECEIVERS
No full textA numerical investigation of a longitudinally finned parabolic trough solar receiver tube was carried out. The main aim of this work was to analyze the impact of the fin height and location within the receiver tube. Nusselt number, friction factor, maximum temperature, and performance evaluation criterion were investigated numerically. Analyses were carried out using different heights and locations of the inner longitudinal fins with Syltherm800 as the heat transfer fluid and for Reynolds numbers ranging from 20,000 to 60,000. According to the results, fins located on the lower side significantly enhance heat transfer, while fins on the upper side drive higher velocity toward the lower section. Consequently, shorter fins in the lower section and longer fins in the upper section are recommended to optimize efficiency. For a symmetric distribution of fins, it was found that the fins should be positioned in the areas with the highest heat flux. Compared to a smooth receiver tube, the maximum temperature for the optimal cases with four and eight fins decreased by 8–25 K and 11–36 K, respectively
Eriocaulon shrirangii (Eriocaulaceae), a new species from the lateritic plateaus of Konkan region of Maharashtra, India
No full textBorude, Arun Nivrutti Chandore Devidas Bhausaheb, Bhalekar, Paresh Pandharinath, Madhav, Nilesh Appaso, Gosavi, Kumar Vinod Chhotupuri (2022): Eriocaulon shrirangii (Eriocaulaceae), a new species from the lateritic plateaus of Konkan region of Maharashtra, India. Phytotaxa 574 (2): 165-172, DOI: 10.11646/phytotaxa.574.2.5, URL: http://dx.doi.org/10.11646/phytotaxa.574.2.
Dipcadi janae-shrirangii (Asparagaceae), a new species from the lateritic plateaus of Konkan region of Maharashtra, India
No full textChandore, Arun Nivrutti, Borude, Devidas Bhausaheb, Bhalekar, Paresh Pandharinath, Madhav, Nilesh Appaso, Gosavi, Kumar Vinod Chhotupuri (2021): Dipcadi janae-shrirangii (Asparagaceae), a new species from the lateritic plateaus of Konkan region of Maharashtra, India. Phytotaxa 524 (1): 37-44, DOI: 10.11646/phytotaxa.524.1.
- …
