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| 2. |
- Arora, Neha, et al.
(författare)
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NMR-Based Metabolomic Approach To Elucidate the Differential Cellular Responses during Mitigation of Arsenic(III, V) in a Green Microalga
- 2018
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Ingår i: ACS Omega. - : American Chemical Society (ACS). - 2470-1343. ; 3:9, s. 11847-11856
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Tidskriftsartikel (refereegranskat)abstract
- Nuclear magnetic resonance (NMR)-based metabolomic approach is a high-throughput fingerprinting technique that allows a rapid snapshot of metabolites without any prior knowledge of the organism. To demonstrate the applicability of NMR-based metabolomics in the field of microalgal-based bioremediation, novel freshwater microalga Scenedesmus sp. IITRIND2 that showed hypertolerance to As(III, V) was chosen for evaluating the metabolic perturbations during arsenic stress in both its oxidation states As(III) and As(V). Using NMR spectroscopy, we were able to identify and quantify an array of ∼45 metabolites, including amino acids, sugars, organic acids, phosphagens, osmolytes, nucleotides, etc. The NMR metabolomic experiments were complemented with various biophysical techniques to establish that the microalga tolerated the arsenic stress using a complex interplay of metabolites. The two different arsenic states distinctly influenced the microalgal cellular mechanisms due to their altered physicochemical properties. Eighteen differentially identified metabolites related to bioremediation of arsenic were then correlated to the major metabolic pathways to delineate the variable stress responses of microalga in the presence of As(III, V).
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| 3. |
- Gururani, Dheeraj Mohan, et al.
(författare)
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Mapping Prospects for Artificial Groundwater Recharge Utilizing Remote Sensing and GIS Methods
- 2023
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Ingår i: Water. - : MDPI. - 2073-4441. ; 15:22
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Tidskriftsartikel (refereegranskat)abstract
- The indiscriminate use of groundwater and its overexploitation has led to a significant decline in groundwater resources in India, making it essential to identify potential recharge zones for aquifer recharge. A study was conducted to determine such potential recharge zones in the Nandhour-Kailash River watershed. The study area included 1481 streams divided into 12 sub-basins (SWS). The results show that the downstream Saraunj sub-basins (SWS-11) and Odra sub-basins (SWS-12) were high priority and required immediate soil and water conservation attention. Sub catchments Lobchla West (SWS-4), Deotar (SWS-5), Balot South (SWS-8), Nandhour (SWS-9), and Nakoliy (SWS-10) had medium priority and were designated for moderate soil erosion and degradation. In contrast, sub-catchments Aligad (SWS-1), Kundal (SWS-2), Lowarnala North (SWS-3), Bhalseni (SWS-6), and Uparla Gauniyarao (SWS-7) had low priority, indicating a low risk of soil erosion and degradation. Using the existing groundwater level data, the potential map of groundwater was validated to confirm its validity. According to the guidelines provided by the Integrated Mission for Sustainable Development (IMSD), the results of the groundwater potential zones for good to very good zones have been integrated at the slope and stream order. In a 120.94 km2 area with a slope of 0–5% in first-order streams, 36 ponds were proposed, and in a 218.03 km2 area with a slope of 15% in first- to fourth-order streams, 105 retention dams were proposed and recognized as possible sites for artificial groundwater recharge. The proposed water harvesting structure may aid in continuously recharging these zones and benefit water resource managers and planners. Thus, various governmental organizations can use the results to identify possible future recharge areas.
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| 5. |
- Kishor, Kamal, et al.
(författare)
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Sources, spatio-temporal distribution and depth variations in groundwater salinity of the semi-arid Rohtak district, Haryana, India
- 2022
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Ingår i: Groundwater for Sustainable Development. - : Elsevier BV. - 2352-801X. ; 18, s. 100790-
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Tidskriftsartikel (refereegranskat)abstract
- Groundwater salinity was evaluated in the Rohtak district of the state of Haryana in northwestern India. The groundwater samples were collected from 82 villages of the district. Both post-monsoon and pre-monsoon samplings were carried out for two consecutive years (2017-2019). A total of 620 samples in the four seasons (155 in each season) were collected under strict QAs and QCs from APHA. The co-existing hydro-chemical parameters of salinity, total dissolved solids (TDS) and electrical conductivity (EC) were determined. ArcGIS 10.5 was used for spatiotemporal distribution evaluation. Groundwater salinity values between 0.20 and 8.00 parts per thousand (ppt) were obtained. Hand pump water is more saline (0.3-7.5 ppt) than bore-well (0.2-1.8 ppt) and dug-well water (0.6-1.3 ppt), thus limiting the options for viable water sources. Higher groundwater salinity in the post-monsoon season as compared to pre-monsoon season was observed. Groundwater salinity in the Rohtak district decreases in the order: Lakhan-Majra < Meham < Rohtak < Sampla < Kalanaur. Safer groundwater salinity levels were found in deep bore wells (>20 m) versus shallow bore wells (<20 m). Thus, this study evaluates the spatio-temporal and depth variations in groundwater salinity of Rohtak district. Possible remedial measures for salinity problems are proposed.
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| 6. |
- Maity, Jyoti Prakash, et al.
(författare)
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Seven 21st century challenges of arsenic-fluoride contamination and remediation
- 2021
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Ingår i: Groundwater for Sustainable Development. - : Elsevier BV. - 2352-801X. ; 12
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Tidskriftsartikel (refereegranskat)abstract
- Arsenic (As) and Fluoride (F) are two commonly occurring geogenic contaminants in groundwater environment, causing a range of carcinogenic and non-carcinogenic adverse health effects worldwide. Several studies have been conducted in past and many are ongoing to address As and F contamination issue of natural water. This special issue is conferring in recent times one of the emerging fields of science regarding co-occurrences of multi-contaminants within a given system and associated health risks. This special issue is divided into three sections. Section I deals with the occurrence and co-existence of As, F, and trace elements (TE) in the environment. As and F occurrence [including trace elements (TEs)] in groundwater at a global scale (example: India, Sri Lanka, Bangladesh, Ghana, and Iran, etc.) has been highlighted (Section I). The geological, and anthropogenic factors affecting As and F contamination have been observed. The state-of-art, removal techniques for As and F have been discussed. Section II and Section III incorporate all the advanced removal methods for As and F, respectively. Arsenic and F removal comprises assessing natural remediation potential (phytoremediation) including different advanced absorbents. The new findings published here, bring together a wide range of new insights on As and F behavior in the groundwater environment.
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| 8. |
- Singh, Ashutosh, et al.
(författare)
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Taxonomy of cryptic species in theCyornis rubeculoidescomplex in the Indian subcontinent
- 2020
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Ingår i: Ibis. - : WILEY. - 0019-1019 .- 1474-919X. ; 162:3, s. 924-935
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Tidskriftsartikel (refereegranskat)abstract
- Taxa classified as subspecies may in fact be cryptic species. We assessed the taxonomic status of the Blue-throated FlycatcherCyornis rubeculoidescomplex in India, which consists of several forms with similar plumages and song. We used mitochondrial and nuclearDNA, plumage traits, and detailed song analysis to ascertain the taxonomic status of the different forms. The molecular data identified three primary clades: (1) in the west Himalayan foothills, (2) at higher elevations in the northeast hill states of Meghalaya, Nagaland and Mizoram, and (3) at lower elevations in the northeastern hills of Meghalaya and the east Himalayas of Arunachal Pradesh. The western clade represents nominateC. rubeculoides rubeculoides. The high-elevation eastern clade was considered to beC. rubeculoides rogersi, because it included a sample from this subspecies from near the type locality in southwest Myanmar. These two sister clades had an estimated divergence time of 1.5 million years (my). The low-elevation east clade has previously been assigned toC. rubeculoides, but we showed it is closely related to the Hainan Blue FlycatcherCyornis hainanus, formerly thought to breed only further east, with an estimated divergence time of only ~0.8 my. This clade may represent a subspecies ofC. hainanusor, given reports of widespread sympatry withC. hainanusin Thailand, a distinct species,Cyornis dialilaemus. However, more research is advocated, including molecular data, from the area of overlap. Songs were remarkably similar across all taxa. In playback experiments,C. r. rubeculoidesin the west responded to all taxa. This is in agreement with recent work demonstrating that song differences and responses to songs are not always a good indicator of the progress of reproductive isolation.
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| 9. |
- Thynell, Marie, et al.
(författare)
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Sustainable Transport and the modernisation of urban transport in Delhi and Stockholm
- 2010
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Ingår i: Cities; The International Journal of Urban Policy and Planning. ; 27:6, s. 421-429
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Tidskriftsartikel (refereegranskat)abstract
- This article addresses issues of the development of transport systems taking its examples from Delhi and Stockholm. The introduction of the first bus rapid transport corridor in Delhi and the congestion tax in Stockholm is presented and discussed in terms of modernization and sustainable transport. This paper explores the perceptions of politicians and examines some transport plans in the search for the driving forces for transport policies. The continuing presence of a high proportion of non-motorized modes of transport and use of public transport in Delhi over the past fifty years gives it a greater political opportunity for creating a more inclusive city than Stockholm. Whereas, in Stockholm, awareness of the influence of emissions on climate change makes the inhabitants more inclined to accept fees for the use of city streets where sustainable transport and modernization of transport systems are seen as key activities, but are perceived and operationalized differently in Delhi and Stockholm. Despite all the differences, some similarities in the development of their urban transport projects have been found. This paper inquires into the planning and operationalization of transport modernization and the politics of sustainable transport.
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