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Ground Rupturing Due to Entrapped Air/Gas in the Unconfined Zone

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International Journal of Geosciences 2010年第3期1卷 149-154页

作者： Manas Banerjee Vimla Prasad singh hridaya Narain singh Daya Shankar Sun jay Uma shanker singh 不详

The sudden and large oscillation of pressure of compressed air/gas entrapped in porous medium due to the changes in the actual pore-fluid pressure, during recharge of water following intense rainfall after a prolonged period of dryness such that the rainfall intensity exceeding infiltration capacity, leads to the generation of hydo-tremors. These hydro-tremors cause ground rupturing, subsidence, developments of cracks in the building, etc. A theoretical model has been presented to estimate the successive values of compressed air/gas pressures due to the successive development of actual pore-fluid pressures and effective stresses during recharge of water of the unconfined zone during the onset of the summer monsoon of 2008 in the northern parts of India.

关键词： Unconfined Zone Compressed Air/Gas Pore-Fluid Pressure Hydro-Tremor Ground Rupturing Effective Stress

Heteromeric and Homomeric Geranyl Diphosphate Synthases from Catharanthus roseus and Their Role in Monoterpene Indole Alkaloid Biosynthesis

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Molecular Plant 2013年第5期6卷 1531-1549页

作者： Avanish Rai Shachi S. Smita Anup Kumar singh Karuna shanker Dinesh A. Nagegowda CSIR-Central Institute of Medicinal and Aromatic Plants Research Centre Bangalore 560065 India CSIR-Central Institute of Medicinal and Aromatic Plants Lucknow 226015 India

Catharanthus roseus is the sole source of two most important monoterpene indole alkaloid （MIA） anti- cancer agents： vinblastine and vincristine. MIAs possess a terpene and an indole moiety derived from terpenoid and shikimate pathways, respectively. Geranyl diphosphate （GPP）, the entry point to the formation of terpene moiety, is a product of the condensation of isopentenyl diphosphate （IPP） and dimethylallyl diphosphate （DMAPP） by GPP synthase （GPPS）. Here, we report three genes encoding proteins with sequence similarity to large subunit （***） and small subunit （***） of heteromeric GPPSs, and a homomeric GPPSs. *** is a bifunctional enzyme producing both GPP and geranyl geranyl diphosphate （GGPP）, *** is inactive, whereas CrGPPS is a homomeric enzyme forming GPP. Co-expression of both subunits in Escherichia coil resulted in heteromeric enzyme with enhanced activity producing only GPR While *** and CrGPPS showed higher expression in older and younger leaves, respectively, *** showed an increasing trend and decreased gradually. Methyl jasmonate （MelA） treatment of leaves sig- nificantly induced the expression of only ***. GFP localization indicated that *** is plastidial whereas CrGPPS is mitochondrial. Transient overexpression of *** in C. roseus leaves resulted in increased vindoline, immediate monomeric precursor of vinblastine and vincristine. Although C. roseus has both heteromeric and homomeric GPPS enzymes, our results implicate the involvement of only heteromeric GPPS with *** regulating the GPP flux for MIA biosynthesis.

关键词： C. roseus monoterpene indole alkaloids geranyl diphosphate synthase heteromer homomer large subunit small subunit vindoline.

Autochthonous halotolerant plant growth-promoting rhizobacteria promote bacoside A yield of Bacopa monnieri(L.)Nash and phytoextraction of salt-affected soil

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Pedosphere 2020年第5期30卷 671-683页

作者： Umesh PANKAJ Durgesh Narain singh Pooja MISHRA Pooja GAUR C.S.Vivek BABU Karuna shanker Rajesh Kumar VERMA Department of Soil Science CSIR-Central Institute of Medicinal and Aromatic PlantsLucknow 226015(India) Division of Biotechnology CSIR-Central Institute of Medicinal and Aromatic PlantsLucknow 226015(India) Division of Microbial Technology CSIR-Central Institute o f Medicinal and Aromatic PlantsLucknow 226015(India) Analytical Chemistry Department CSIR-Central Institute o f Medicinal and Aromatic PlantsLucknow 226015(India) Research Centre CSIR-Central Institute of Medicinal and Aromatic PlantsBangalore 560065(India)

Phytoremediation is a promising approach for reclamation of salt-affected *** is the most commonly used process,which exploits plants to absorb,immobilize,and accumulate salt in their *** this study,halotolerant plant growth-promoting rhizobacteria(PGPR)were isolated from the rhizosphere of wild grasses growing naturally in salt-affected areas of Lucknow,Uttar Pradesh(India)and were tested for their efficacies of salt-tolerance and plant growth-promoting(PGP)*** on 16S rRNA sequences,the most efficient halotolerant isolates possessing PGP traits were identified as Pseudomonas plecoglossicida(KM 233646),Acinetobacter calcoaceticus(KM 233647),Bacillus flexus(KM 233648),and Bacillus safensis(KM 233652).Application of these isolates as bio-inoculants significantly(P<0.05)increased the growth and bacoside A yield of a medicinal plant,Bacopa monnieri(L.)Nash,grown on natural salt-affected *** phytoremediation of salt-affected soil was evident by the substantial increase in shoot Na^+:K^+ratio of bio-inoculant-treated *** compared to un-inoculated control plants,the soil physico-chemical properties of bio-inoculant-treated plants were *** shoot and root biomass(fresh and dry weights),soil enzymes,and soil nutrient parameters showed significant positive correlations with the shoot Na+:K+***,the halotolerant PGPR screened in this study could be useful for the reclamation of saline soils concomitant with improved plant growth and bacoside A yield.

关键词： bio-inoculant phytoremediation plant productivity soil physico-chemical property soil salinity

Exploring the benefits of biochar over other organic amendments for reducing of metal toxicity in Withania somnifera

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Biochar 2019年第3期1卷 293-307页

作者： Nidhi Nigam Vineet Yadav Puja Khare Raghuvendra Pratap singh Paurabi Das Karuna shanker Ram Suresh Sharma Agronomy and Soil Science Division CSIR-Central Institute of Medicinal and Aromatic PlantsP.O.-CIMAPNear Kukrail Picnic SpotLucknow 226015India Analytical Chemistry Division CSIR-Central Institute of Medicinal and Aromatic PlantsLucknow 226015India Technology and Business Development Division CSIR-Central Institute of Medicinal and Aromatic PlantsLucknow 226015India

Biochar is considered as a good metal sequester and ameliorates the metal toxicity and uptake in ***,its effec-tiveness over other organic amendments is not well *** aim of this study is to compare the biochar amendments alleviating the levels of Pb and Cd in Withania somnifera *** with other organic *** manure,vermicom-post,and biochar were applied in the field spiked with highly available Pb and *** bioavailability and accumulation,plant growth and plant physiology,antioxidant enzymes and metabolite content of *** along with soil properties were evaluated in all *** indicates that the application of organic manures significantly alleviated the metal levels(33-72%)in the plant in comparison with *** herbage yield was significantly higher(33-69%)under different organic manures as compared to the metal *** metabolite contents and antioxidant enzymes were higher in metal treatments in comparison with *** manures were not only able to restrain the Pb and Cd in soil but also enhanced the soil microbial *** indicate that biochar amendments were more promising than farmyard manure and vermicompost due to the presence of more stable carbon in biochar and more alleviation in metal *** addition,net profit in the cultivation of *** was higher for biochar amendments(50%higher)compared to *** study recommended that biochar could be a better option for commercial and safer production of ***.

关键词： Toxic metals Withania somnifera Biochar Phytotoxicity

Distribution Behaviour of Dimethoate in Tea Leaf

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Journal of Environmental Protection 2011年第4期2卷 482-488页

作者： Shivani Jaggi Bikram singh Adarsh shanker Maya Institute of Technology & Management Selaqui Dehradun Uttarakhand India 2Institute of Himalayan Bioresource Technology (IHBT) Council of Scientific & Industrial Research Palampur (Himachal Pradesh) India

A study was undertaken to assess the distribution behaviour of Dimethoate in tea leaf. Tea bushes were subjected to Dimethoate spray at recommended dose and double the recommended doses. The extraction of pesticide was done using chloroform and the analysis was done using a Hewlett-Packard 5890 series II gas chromatograph with Nitrogen Phosphorus Detector (NPD). The penetration behaviour of Dimethoate was studied in dry and wet seasons. Variations in penetration were observed in dry and wet seasons which was attributed to climatic factors like temperature, humidity, rainfall, sunlight and physicochemical properties of the residue like water solubility, partition coefficient and formulation type. Residues observed in the cell wall and tissues confirm its good penetrating ability inspite of its hydrophilic nature. Higher penetration in wet season as indicated can be attributed to the route through the stomatal pores.

关键词： Tea Cuticle Dimethoate Dissipation

Evaluation of Hydrogeology of the Lower Son Valley Based on Remote Sensing Data

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Journal of Geographic Information System 2010年第4期2卷 219-226页

作者： Manas Banerjee Debolin Bhattacharya Hriday Narain singh Daya shanker 不详

Remote sensing, one of the most important reconnaissance and feature identifying tools generally applied for surface and groundwater investigation, was used for water resources mapping for the lower Son Valley in this study. The mapping was done with the help of Indian Remote Sensing (IRS) satellite imagery IRS-LISS- 1-B1 for January 29, 1991 obtained during the day transit time. The area under study comprises adjoining parts of Uttar Pradesh and Bihar states of India and extends over the seven districts, namely Bhojpur, Rohtas, Patna, Jahanabad, Aurangabad, Ballia and Chapra. Geology of the study area is quite complex, tectonically disturbed and shows four major cycles of depositions after erosions during last one billion years (since Cretaceous). Two lineaments mapped by GSI (Geological Survey of India) in western side of river Son in the Bhojpur district can also be identified by the satellite imagery. In the present study, apart from these lineaments, two new lineaments have been investigated, which run almost parallel to river Ganga in northwest parts of the area in Ballia district. The lineaments may play a very vital role in groundwater monitoring in the area. The detailed study of geomorphology, vegetation and geology of the Lower Son valley on the basis of photo-interpretation techniques for surface features, drainage pattern and density, and drainage texture has been carried out to determine alluvial type, permeability, tributary, etc. These studies and Darcy velocity analysis show that the prospect of water is very good for entire lower Son valley. The Bhojpur district is most prospective for groundwater exploitation.

关键词： Lower Son Valley Groundwater Monitoring Satellite Imageries Vindhyan Super Group of Kaimur Series Lineaments Drainage Analysis

Bronchogenic Carcinoma in a Scleroderma Patient with Multiple Metastases： One Case Report

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Clinical oncology and cancer researeh 2010年第3期7卷 214-216页

作者： Pradipta Guha Shivesh shanker Sahai Debasis Sarkar Partha Sardar Anup singh Bipiab Mandal Bidyut Kumar Das Sanjoy Kumar Chatterjee Department of General Medicine Medica College Kolkata 700083 West Bengal India.

IntroductionThe association between pulmonary interstitial fibrosis and the development of bronchogenic carcinoma in a patient with scleroderma has been reported rarely. It is hypothesized that intense epithelial proliferation that is accompanied by the .brotic process increases the occurrence of carcinomatous changes. We report the case of a pa-tient who presented with 3-year history of Raynaud＇s phenomenon, gradual tightening of the skin which was ignored by the patient and her family members, and a 2-week history of severe respiratory dis-tress with left shoulder and upper back pain followed by the develop-ment of paraparesis. After a series of examinations, the patient was diagnosed with scleroderma and simultaneously with bronchogenic carcinoma and multiple distant metastases.

关键词： scleroderma bronchogenic carcinoma metastasis.

Structural and Ion Transport Studies in (100-x) PVdF + xNH<sub>4</sub>SCN Gel Electrolyte

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Materials Sciences and Applications 2011年第7期2卷 721-728页

作者： Kamlesh Pandey Mrigank Mauli Dwivedi Nidhi Asthana Markandey singh shanker Lal Agrawal 不详

In order to obtain highly conductive polymer gel electrolytes for electrochemical devices, Poly (vinylidene fluoride) (PVdF) based gel electrolytes namely (100–x)PVdF + xNH4SCN electrolyte system has been synthesized by solution cast technique and characterized by XRD, DSC, IR, SEM and electrical measurements. IR study of gel electrolytes shows interaction of PVdF matrix and dopant salt with prominence of α-phase. This result is also well supported by XRD and DSC studies. The electrolytes are electrochemically stable within ± 1.5 V. The optimum bulk electrical conductivity for 90PVdF + 10NH4SCN electrolyte has been found to be ~ 2.5 × 10–2 S●cm–1. Dielectric relaxation behavior shows low frequency dispersion and αc-related relaxation peak is observed in loss spectra. Polarization behavior of gel electrolyte shows ionic nature of charge transport (Tion. > 0.90). The temperature dependent conductivity shows VTF behavior.

关键词： Poly (Vinylidene Fluoride) Gel Electrolyte Ion Transport Dielectric Relaxation Structural Studies