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Nagarajan, P.
- Effect of Different Nitrogen Concentrations on the Biomass and Biochemical Consituents of Spirulina platensis [Geitler]
Authors
1 Department of Agricultural Microbiology, Agricultural College and Research Insitute, Madurai, T.N., IN
Source
Asian Journal of Bio Science, Vol 8, No 2 (2013), Pagination: 245-247Abstract
Nitrogen is one of the primary requirements of growth media for any cell. Absence of nitrogen or starvation condition is considered as stress by the organisms. Increasing the nitrogen concentration upto 0.04 M significantly increased the biomass, protein, phycocyanin and lipid content of Spirulina, while total carotenoids and ?-carotene content were reduced compared to control. In contrast, the biomass, protein, phycocyanin and lipid content were reduced in the control indicating that nitrogen requirement for synthesis of aminoacids, which make up protein and other cellular components such as phycocyanin. The accumulation of carotenoids under nitrogen starvation may be due to production of a large amount of acetyl-CoA, which serves as a precursor for synthesis of carotenoids.Keywords
Spirulina Platensis, Nitrogen, Biomass, Pigment, LipidsReferences
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- Troubleshooting Networks Using Internet Control Message Protocol
Authors
1 Department of Computer Science, Karpagam University, Coimbatore, IN
Source
Networking and Communication Engineering, Vol 1, No 4 (2009), Pagination: 163-168Abstract
The Internet Control Message Protocol is classic example of a client server application. The ICMP server executes on all IP end system computers and all IP intermediate systems (routers). The protocol is used to report problems with delivery of IP datagram within an IP network. It can be used to report about errors when a particular End System is not responding, when an IP network is not reachable, when a node is overloaded, when an error occurs in the IP header nformation, etc. The protocol is also frequently used by Internet managers to verify the correct operations of End Systems and to check that routers are correctly routing packets to the ecified destination address. The ICMP is also used for troubleshooting the TCP/IP networks. In this paper we demonstrate how the troubleshooting can be done more effective with the use of ICMP. We also discuss about security flaws of ICMP and problems in Source Quench message of ICMP messages and suggestions to solve the problems.
Keywords
End System, Error Reporting, Network Security, ICMP, Query, Router, Source Quench, TCP/IP, Troubleshooting.- Bulk Arrival, Fixed Batch Service Queue with Unreliable Server and with Compulsory Vacation
Authors
1 Departmemt of Mathematics, Annamalai University, Annamalai Nagar, Chidambaram - 608002, Tamil Nadu, IN
2 Department of Mathematics, SCSVMV University, Sri Jayendra Saraswathi Street, Enathur, Kanchipuram - 631561, Tamil Nadu, IN