Informatics Publishing Limited

Srikanth R. Medipally ¹, B. Naresh ², S. Manoj Kumar ¹, Fatimah Md. Yusoff ³, Prathibha Devi ¹

Affiliations
1 Biotechnology Laboratory, Department of Botany, Osmania University, Hyderabad-500007, IN
2 Department of Botany, Narendra PG College, Telangana Univrsity, Armoor, Nizamabad-503224, IN
3 Laboratory of Marine Biotechnology, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, MY

Abstract

Jatropha curcas is a non-edible oil plant species and belongs to Euphorbiaceae family. It is gaining the importance as potential renewable feed-stock for biodiesel production. Here in the present study we developed an efficient micropropagation protocol through somatic embryogenesis from leaf and shoot tip explants of Jatropha curcas. Murashigae-Skoog medium supplemented with 2, 4-D (0.5mg/l) and benzylaminopurine (5mg/l) resulted in the production of green embryogenic callus with clearly differentiated somatic embryos with a frequency of plant conversion rate from shoot tip and leaf explants was 51 ± 0.9 and 54 ± 0.6 respectively. The regenerated shoots were ischolar_mained on ischolar_main induction medium, transplanted to pots and later transferred to field. The survival percentage of the transplanted plants was 33±0.1 for shoot tip and 24±0.7 for leaf explant. Therefore, this protocol could be useful for micropropagation of Jatropha curcas as effective feed-stock towards biodiesel production.

Keywords

Physic Nut, Micropropagation, MS Medium, Biodiesel, Euphorbiaceae

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B. Naresh ¹, P. Solomon Raju ¹, G. Suresh ¹, A. N. S. Sarma ¹, R. Vijaya Ragavan ¹, Satish Saha ¹, D. Srinagesh ¹

Affiliations
1 CSIR-National Geophysical Research Institute, Hyderabad 500 007, IN

Abstract

The Nellore district in the Southeastern part of Andhra Pradesh is one of the nine coastal districts of the state. The microtremor activity in the district started in October 2015 and continued up to July 2016. During this period, a few hundred tremors were recorded by the temporary seismic network installed locally by the CSIR-NGRI. Apart from the data recorded by this network, those from the semipermanent seismic stations at Racherla, Addanki, Cuddapah, Srikalahasti and Srisailam were used in the study¹.

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D. Srinagesh ¹, Prantik Mandal ¹, R. Vijaya Raghavan ¹, Sandeep Gupta ¹, G. Suresh ¹, D. Srinivas ¹, Satish Saha ¹, M. Sekhar ¹, K. Sivaram ¹, Sudesh Kumar ¹, P. Solomon Raju ¹, A. N. S. Sarma ¹, Y. V. V. S. B. Murthy ¹, N. K. Borah ¹, B. Naresh ¹, B. N. V. Prasad ¹, V. M. Tiwari ¹

Affiliations
1 CSIR-National Geophysical Research Institute, Hyderabad 500 007, IN

Abstract

According to the Gutenberg–Richter law¹, at least one earthquake of magnitude greater than 7 occurs every month along the seismically active belts in the world. Earthquakes are the manifestation of fault slip at depths, thus, there is no direct method to measure or observe them. However, seismometers can record ground velocity or acceleration caused by the occurrence of an earthquake when a fault slip occurs at depth. Therefore, setting up a seismic network is inevitable to understand the physics of earthquake processes, thereby, mitigating earthquake hazard.

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D. Srinagesh ¹, Dhiraj Kumar Singh ¹, G. Vikas ¹, B. Naresh ¹, Sunil Roy ¹, Y. V. V. B. S. N. Murthy ¹, P. Solomon Raju ¹, G. Suresh ¹, Prantik Mandal ¹, A. N. S. Sharma ¹, M. Shekar ¹, V. M. Tiwari ¹

Affiliations
1 CSIR-National Geophysical Research Institute, Hyderabad 500 007, IN

Abstract

The present study focuses on the recent earthquake activity in Palghar region, Maharashtra, India. Until 31 August 2019, a total of 4854 earthquakes have been located here, whose local magnitude (M_L) varied from 0.1 to 4.1. Majority of the earthquakes (~94%) were located in the depth range 4–16 km. The precise earthquake relocations reveal two clusters. The N–S trending cluster north of 20.04°N extends to a depth of 10 km, whereas the NE–SW trending cluster to the south of 20.04°N extends to 16 km depth. The shallow northern cluster is noticed to be sandwiched between two mapped mafic intrusions, whereas the deeper southern segment shows earthquakes clustering around the mafic intrusion. The modelled composite focal mechanism solutions for both the north and south clusters suggest normal faulting with a minor strike–slip component as the dominant deformation mode for the Palghar region. From relocated seismici-ty, we have detected a deeper seismically active zone (with M> 3) at 4–16 km depth, occupying a crustal volume of 1440 km 3 (i.e. 20 km (in N–S) ×6 km (in E– W) and 12 km (in depth)) that dips toward 20°S and 70°W. This could be attributed to the large crustal stresses induced by the mafic intrusive body below the region.

Keywords

Crustal Stress, Deformation Mode, Earth-quake, Mafic Intrusion, Relocations, Seismic Activity.

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