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| 1 | Bioactivity guided isolation of mosquito larvicide from Piper longum显示文摘Objective:To isolate the larvicidal component from the fruits of Piper longum(P.longum) against the filariasis vector,Culex quinquefasciatus(C.quinquefasciatus).Methods:Pulverized fruits of P.longum were subjected to soxhlet extraction using series of organic solvents of increasing polarity.All the solvent extracts were verified for their larvicidal efficacy against 4th instar larvae of C.quinquefasciatus employing standard WHO procedure.Bioassayguided fractionation through column chromatography lead to the isolation of a bioactive amide, pipyahyine from the petroleum ether extract.Results:Petroleum ether extract was found to be the most active fraction among all the extracts tested with LC50 and LC90 being 1.03 and 2.04 ppm respectively.Whereas,pipyahyine,an isolated component of the same fraction was found to be even more effective than the parent extract in terms of LC50 being 0.58 and 1.88 ppm respectively. Conclusions:From the results,it is evident that P.longum can be considered as a powerful arsenal for the control of mosquito population. | Madhu.S Kumar Vijayan VA Shaukath AK | 2011 | Asian Pacific Journal of Tropical Medicine2011，4，2： | 3 |
| 2 | Daily home hemodialysisat a health maintenance organization : three - year experience显示文摘 | Kumar VA Ledezma ML Rasgon SA | 2007 | Hemodeial Int2007，11，： | 1 |
| 3 | An unusual case of syringocystadenoma papilliferum of the eyelid 显示文摘 | Rao VA Kamath GG Kumar A | 1996 | Indian J Ophthalmol1996，44，3： | 1 |
| 4 | Prevalence and characterization of diarrheagenic Escherichia coli isolated from adults and children in Mangalore, India 显示文摘 | Shetty VA Kumar SH Shetty AK | 2012 | Lab Physicians2012，4，1： | 1 |
| 5 | Extended daily dialysis:A new approach to renal replacement for acute renal failure in the intensive care unit显示文摘 | Kumar VA Craig M Depner TA | 2000 | Am J Kidney Dis2000，36，： | 1 |
| 6 | CAD integrated analysis of flatness in a formtoelrance zone显示文摘 | TECH T B SENTHIL KUMAR A SUBRAMANIAN VA | 2001 | Computer Aided-Design2001，33，： | 1 |
| 7 | Magnetic resonance imaging features of pilocytic astrocytoma of the brain mimic- king high-grade gliomas显示文摘 | Kumar AJ Leeds NE Kumar VA | 2010 | J Comput Assist Tomogr2010，34，4： | 1 |
| 8 | Extended daily dialysis: a new approach to renal replacement for acute renal failure in the intensive care unit显示文摘 | Kumar VA Craig M Depner TA | 2000 | American Journal of Kidney Diseases2000，36，2： | 1 |
| 9 | Nocardiafarcinica brain ab- scess : epidemiology, pathophysiology, and literature review 显示文摘 | Kumar VA Augustine D Panikar D | 2014 | Surg Infect( Larchmt)2014，15，5： | 1 |
| 10 | Expression and activity of Racl is negatively affected in the dehydroepiandrosterone induced poly- cystic ovary of mouse显示文摘 | Maurya VK Sangappa C Kumar VA | 2014 | J Ovarian Res2014，7，1： | 1 |
| 11 | Magnetic resonance imaging features of pilocytic astrocytoma of the brain mimicking high-grade gliomas 显示文摘 | KUMAR AJ LEEDS NE KUMAR VA | 2010 | Comput Assist Tomogr2010，34，4： | 1 |
| 12 | Prevalence andCharacterization of Diarrheagenic Escherichia coli isolated fromAdults and Children in Mangalore, India显示文摘 | Shetty VA Kumar SH Shetty AK | 2012 | J Lab Physicians2012，4，1： | 1 |
| 13 | Chiral analogues of peptide nucleic acids: synthesis of 4-aminoprolyl nucleic acids and DNA complementation studies using UV/CD spectroscopy 显示文摘 | Gangamani BP Kumar VA Ganesh KN | 1999 | Tetrahedron1999，55，1： | 1 |
| 14 | Vitamin D supplementation and recombinant human erythropoietin utilization in vitamin Ir-defi?cient hemodialysis patients 显示文摘 | Kumar VA Kujubu DA Sim 11 | 2011 | J Nephrol2011，24，1： | 1 |
| 15 | Experimental models for nephropathy 显示文摘 | Balakumar P Chakkarwar VA Kumar V | 2008 | J Renin Angiotensin Aldosterone Syst2008，9，4： | 1 |
| 16 | Potential of dual-time-point imaging to improve breast cancer diagnosis with 18F-FDG PET显示文摘 | Kumar R Loving VA Chauhan A | 2005 | J Nucl Med2005，46，11： | 1 |
| 17 | Production of Hepatitis B surface Antigen in Recombinant plant sys- tems : An update 显示文摘 | Kumar GB Ganapathi TR Bapat VA | 2007 | Biotechnol Prog2007，，3： | 1 |
| 18 | New drugs you are going to read about: serelaxin, ularitide, TRV027 显示文摘 | Kumar VA Viau D Levy P | 2015 | Curt Emerg Hosp Med Rep2015，3，2： | 1 |
| 19 | Potential of dual-timepoint imaging to improve breast cancer diagnosis with ^18F-FDG PET 显示文摘 | Kumar R Loving VA Chauhan A | 2005 | J Nucl Med2005，46，11： | 1 |
| 20 | Extended daily dialysis : a new approach to renal replacement for acute renal failure in the intensive care unit 显示文摘 | Kumar VA Craig M Depner TA | 2000 | Am J Kidney Dis2000，36，2： | 1 |
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