02438nas a2200241 4500008004100000022001400041245017900055210006900234260007600303300001200379490000800391520150800399653001901907653001601926653002101942653001001963653002401973653001901997100001702016700002102033700001902054856012302073 2008 eng d a1436-873000aAccumulation of cadmium in growing peanut (Arachis hypogaea L.) seedlings - its effect on lipid peroxidation and on the antioxidative enzymes catalase and gualacol peroxidase0 aAccumulation of cadmium in growing peanut Arachis hypogaea L see aCOMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USAbWILEY-BLACKWELLcJUN a440-4470 v1713 a

In plants exposed to high metal concentrations, mechanisms to counteract the oxidative burst are crucial for its survival. To investigate the temporal sequence of physiological reactions of peanut seedlings (Arachis hypogaea L.) to cadmium exposure, seeds were cultured in increasing concentrations of CdCl(2), ranging from 50 to 300 mu M. Germination frequency was scored, and the distributions of Cd in root, stem, and leaves were determined after 2 and 4 weeks of culture. Lipid peroxidation and activities of antioxidative enzymes including catalase (CAT, EC 1.11.1.6) and guaiacol peroxiclase (GPX; EC 1.11.1.7) were estimated in these three parts of the plant. Germination of seedlings was not affected, but the growth of seedlings was severely suppressed with increasing concentrations of CdCl(2) and incubation period. Pattern of Cd distribution in the three organs varied with concentration and period of exposure to Cd. Increased lipid peroxidation was detected in all parts of the developing seedlings with increasing metal accumulation. Catalase and guaiacol peroxidase activity varied in the three parts of the seedlings with concentration of Cd and incubation period. Guaiacol peroxidase activity appears to be more active in scavenging the reactive oxygen species in developing peanut seedlings. The results of the present experiment demonstrate the advantages of a tissue-culture model system in studying the complex network of interactions of various factors in stress tolerance.

10aAbiotic stress10aheavy metal10astress tolerance10aTBARS10athiobarbituric acid10aTissue culture1 aKumar, Sunil1 aMehta, Urmil, J.1 aHazra, Sulekha uhttps://library.ncl.res.in/content/accumulation-cadmium-growing-peanut-arachis-hypogaea-l-seedlings-its-effect-lipid-001779nas a2200253 4500008004100000022001400041245012200055210006900177260010200246300001200348490000700360520084400367653002301211653001801234653002801252653002101280653001401301653001401315100001301329700001701342700002101359700001901380856012601399 2008 eng d a0011-389100aDifferential accumulation of manganese in three mature tree species (Holoptelia, Cassia, Neem) growing on a mine dump0 aDifferential accumulation of manganese in three mature tree spec aC V RAMAN AVENUE, SADASHIVANAGAR, P B \#8005, BANGALORE 560 080, INDIAbINDIAN ACAD SCIENCEScMAR a639-6430 v943 a

Three trees, including Cassia siamea (Cassia), Azadirachta indica (Neem), Holoptelia integrifolia (Holoptelia) belonging to three different families were identified from a manganese mine tailing dump. Manganese content in dump soil and in the stem, green leaves and dry, fallen leaves of the plants was determined. Values were compared with similar samples collected from normal vegetation. Under control condition, manganese content was highest in Cassia. Distribution of metal in samples collected from the dump site revealed that Holoptelia has a special ability to accumulate high amounts of manganese under stress condition followed by Cassia and Neem. There is no literature on metal accumulation in Holoptelia. Mechanism of manganese sequestration in Holoptelia is different from the other two trees growing in the same soil.

10aAzadirachta indica10aCassia siamea10aHoloptelia integrifolia10ahyperaccumulator10amanganese10amine dump1 aRaju, D.1 aKumar, Sunil1 aMehta, Urmil, J.1 aHazra, Sulekha uhttps://library.ncl.res.in/content/differential-accumulation-manganese-three-mature-tree-species-holoptelia-cassia-neem-001812nas a2200241 4500008004100000022001400041245013100055210006900186260009500255300001400350490000600364520087100370653003501241653001001276653002501286100001701311700001701328700002001345700002801365700003001393700001701423856013001440 2009 eng d a1533-488000aUltrafast switching time and third order nonlinear coefficients of microwave treated single walled carbon nanotube suspensions0 aUltrafast switching time and third order nonlinear coefficients  a25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USAbAMER SCIENTIFIC PUBLISHERScSEP a5550-55540 v93 a

Microwave treated water soluble and amide functionalized single walled carbon nanotubes have been investigated using femtosecond degenerate pump-probe and nonlinear transmission experiments. The time resolved differential transmission using 75 femtosecond pulse with the central wavelength of 790 nm shows a bi-exponential ultrafast photo-bleaching with time constants of 160 fs (130 fs) and 920 fs (300 fs) for water soluble (amide functionalized) nanotubes. Open and closed aperture z-scans show saturation absorption and positive (negative) nonlinear refraction for water soluble (amide functionalized) nanotubes. Two photon absorption coefficient, beta(0) similar to 250 cm/GW (650 cm/GW) and nonlinear index, gamma similar to 15 cm(2)/pW (-30 cm(2)/pW) are obtained from the theoretical fit in the saturation limit to the data for two types of nanotubes.

10aNonlinear Optical Coefficients10aSWCNT10aUltra-Fast Switching1 aKamaraju, N.1 aKumar, Sunil1 aKarthikeyan, B.1 aKakade, Bhalchandra, A.1 aPillai, Vijayamohanan, K.1 aSood, A., K. uhttps://library.ncl.res.in/content/ultrafast-switching-time-and-third-order-nonlinear-coefficients-microwave-treated-single-0