Role of soil physicochemical characteristics on the present state of arsenic and its adsorption in alluvial soils of two agri-intensive region of Bathinda,Punjab, India     

Kumar  Ravishankar  Kumar  Rabindra  Mittal  Sunil  Arora  Meenu  Babu  J. Nagendra 《Journal of Soils and Sediments》2016,16(2):605-620

Journal of Soils and Sediments - Arsenic (As) contamination of groundwater has received significant attention recently in district Bathinda, due to consequent health risk in this region. Soil is...  相似文献   

Removal of Fluoride from Water by Adsorption onto Lanthanum Oxide     

C. R. Nagendra Rao  Janakiraman Karthikeyan 《Water, air, and soil pollution》2012,223(3):1101-1114

Rare earth mineral based adsorbent viz. lanthanum oxide was investigated for potential application in defluoridation of drinking water for isolated and rural communities. Results of batch experiments indicated about 90% removal in 30 min from a 4 mg L⁻¹ synthetic fluoride solution. The effects of various parameters like contact time, pH, initial concentration, and sorbent dose on sorption efficiency were investigated. Adsorption efficiency was dependent on initial fluoride concentration and the sorption process followed BET model. Variation of pH up to 9.5 has insignificant effect on sorption and beyond a pH of 9.5, the effect was drastic. Among anions investigated, carbonates exhibited high detrimental effect on fluoride adsorption while anions like bicarbonates, chlorides, and sulfates did not seriously affect the process. Adsorbent showed negligible desorption of fluoride in distilled water. Alum was more effective regenerant than HCl and NaOH. Results of cyclic regeneration with alum indicated that the sorbent could be regenerated for ten cycles without significant loss of sorption capacity. Studies with upflow fixed-bed continuous flow columns indicated the usefulness of sorbent for fluoride removal in continuous flow process.  相似文献   

Evaluation of efficiency of hemi-nested PCR assay for the detection of ‘Candidatus Liberibacter’ infecting citrus     

Bhaskara  Adpangaya Sahana  Ahmed  Bandalli N. Jawad  Adkar-Purushothama  Charith R.  Prasad  Mysore N. Nagendra  Sreenivasa  Marikunte Y.  Maheshwar  Pavagada K. Murthy 《植物病害和植物保护杂志》2013,120(5-6):189-193

Journal of Plant Diseases and Protection - The present study reports the development and evaluation of a hemi-nested polymerase chain reaction (hnPCR) assay for the efficient detection of...  相似文献   

Seroprevalence of bluetongue and presence of viral antigen and type-specific neutralizing antibodies in goats in Tripura,a state at Indo-Bangladesh border of northeastern India     

De  Ankan  Das  Tapan Kumar  Chand  Karam  Debnath  Bikas Chandra  Dey  Saikat  Hemadri  Divakar  Barman  Nagendra Nath  Chaudhary  Jitendra Kumar  Muthuchelvan  Dhanavelu  Saxena  Arpit  Tewari  Neha  Chauhan  Ankita  Lohumi  Ankita  Biswas  Sanchay Kumar 《Tropical animal health and production》2019,51(1):261-265

Tropical Animal Health and Production - Bluetongue (BT) is a notifiable multiple species transboundary viral disease of domestic and wild ruminants. Though the disease is enzootic in India, little...  相似文献   

Highly variable ‘Arhar’ simple sequence repeat markers for molecular diversity and phylogenetic studies in pigeonpea [Cajanus cajan (L.) Millisp.]     

Sutapa Dutta  Ajay K. Mahato  Priti Sharma  Ranjeet S. Raje  Tilak R. Sharma  Nagendra K. Singh 《Plant Breeding》2013,132(2):191-196

Pigeonpea is an important tropical grain legume widely cultivated in South and South‐East Asia for versatile end usage as food, feed, fodder and fuel. Recent publication of draft genome sequence of pigeonpea (‘Arhar’) has allowed mining of large numbers of genomic simple sequence repeat (SSR) markers most of which are either not validated or show very little polymorphism in simple agarose gel–based assays. Here, we describe a special category of 370 validated highly variable ‘Arhar’ genomic SSR (HASSR) markers, which provide much higher level of polymorphism than a random set of SSR markers. These markers were validated for consistent amplification in a set of eight pigeonpea varieties and 152 of these (41%) showed allelic polymorphism on agarose gel electrophoresis. Twenty‐four highest polymorphic HASSR markers were used on a larger set of forty pigeonpea varieties and eight wild Cajanus species for the analysis of genetic diversity and phylogenetic relationship. Genomic HASSR markers described here are highly suitable for genetic diversity and phylogenic studies in pigeonpea.  相似文献   

Marketing of Bay Leaf in Nepal and Northern India: Lessons for Improving Terms of Participation of Small Farmers in Markets     

Dyutiman Choudhary  Surendra Kala  Nagendra Todaria  Sabyasachi Dasgupta  Michael Kollmair 《Small-Scale Forestry》2013,12(2):289-305

Non-timber forest product commercialisation requires information on what and who is involved in markets, but this is rarely documented. This paper presents the findings of a study to assess the structure and dynamics of markets for bay leaf (Cinnamomum tamala Nees and Eberm) in Nepal and in Uttarakhand state in India. Data were collected from key informant interviews with stakeholders from the governments of the two countries, research agencies, user groups and traders associations, from focus group discussion involving 100 farmers and district and wholesale level traders, and from stakeholder meeting and interviews with traders using an open-ended questionnaire in the two countries. It was found that of the 2,500 tons of bay leaf traded in Nepal in 2009, 86 % was exported to India. The total size of the bay leaf market in Uttarakhand is estimated at 1,470 tons, with the spice industry as the main consumer. Nepalese bay leaf sustains the demand in Indian markets that were studied. Processing of leaves into essential oil and powder by wholesale traders takes place in Nepal and India respectively, but no regional trade in essential oil was observed. Three quality grades are sold in markets which are not known to the farmers. The bay leaf trade is increasing, creating an opportunity for farmers to engage in its cultivation. There is a need for transferring market information and improving policy implementation to promote transparent and equitable market linkages that enhance benefits to mountain farmers.  相似文献   

Genetic resistance derived from Solanum pimpinellifolium AAU2019 is monogenic recessive to tomato leaf curl virus     

John O. Oladokun  Nagendra S. Barua  Palash D. Nath 《Plant pathology》2022,71(4):990-1000

Tomato leaf curl disease is a severe threat to tomato production. Yield losses are generally high in the absence of effective management strategies. The disease is caused by tomato leaf curl virus (ToLCV) and is transmitted by a whitefly vector that is challenging to control. Resistance to ToLCV is absent from most cultivated tomato gene pools, although the use of resistant cultivars would provide a better control option than minimizing the vector population. Unfortunately, resistance sources based on field screening break down when virus pressure is severe. Our previous screening and virus testing of 40 tomato genotypes led to the identification of a highly resistant genotype, Solanum pimpinellifolium AAU2019, as a new source of resistance. In this study, we investigated the inheritance and genetics of resistance to ToLCV in the cross of Pusa Ruby × S. pimpinellifolium AAU2019 in F₂ and BC₁P_s populations, revealing a monogenic recessive gene (best-fit ratios of resistance: susceptible to be 1:3 and 0:1) responsible for ToLCV resistance in S. pimpinellifolium AAU2019. Hence, S. pimpinellifolium AAU2019 could be considered as a potential donor parent in breeding programmes to develop tomato cultivars with resistance to ToLCV.  相似文献