Laser induced breakdown spectroscopy (LIBS) has been used to perform in situ analysis of major and minor elements present in the different parts of the Bermuda grass (Cynodon dactylon). In situ, point detection/analysis of the elements in plants without any sample preparation has been demonstrated. LIBS spectra of the different parts (leaf blade, leaf sheath and stem) of fresh C. dactylon plant have been recorded to study the pattern of silica deposition in its different parts. Atomic lines of Si, Mg, Ca, C, Al, Zn, N, Sr, etc. have been observed in the LIBS spectra of the C. dactylon. A close observation of LIBS spectra of the different parts of the plants shows that silica concentration is greater in leaf blades than leaf sheaths and stems. The results obtained with LIBS analysis are also compared with the number density of phytoliths deposited in different parts of C. dactylon. It is observed that the highest silicified cell frequency is present in leaf blades followed by leaf sheaths and stems which is in close agreement with LIBS analysis.
Salt is an essential and important dietary mineral for maintaining life. Currently, the issue of the potential benefit or damage from salt intake in chronic kidney disease patients is controversial. The attempt of this article is to bring into focus the potential role of elements particularly sodium, Na, and potassium, K, which are the main constituents of dietary salts, in kidney patients by using laser-induced breakdown spectroscopy (LIBS). LIBS spectra of different salt samples have been recorded in the spectral region 200-500 nm with spectral resolution 0.1 nm and in the spectral region 200-900 nm with spectral resolution 0.75 nm. Quantitative elemental study was carried out to determine the constituents of different types of common Indian edible salts by using the calibration-free LIBS method. Our experimental results demonstrate that Saindha salt (commonly known as rock salt) is more beneficial than other edible salts for patients suffering from chronic kidney disease. The results of the quantitative elemental analysis of the salts obtained from LIBS measurements are also compared to atomic absorption spectroscopy (AAS).
Yield and control of burrowing nematode disease of Musa spp as affected by planting depth and poultry manure rates as soil organic amendment were studied in a 3x3x2 factorial experiment in a randomized complete block design with six replicates. The organic amendments were applied in two Musa spp. The poultry manure was apllied at the rate of 0 t/ha, 5 t/ha and 10 t/ha while the planting depth were 30cm, 45cm, and 60cm respectively. The 0 t/ha of poultry manure served as the control. The result of the analysis showed that burrowing nematode population density and its infection on Musa spp varied among the organic amendment applied. The same was true for yield and other yield components. Planting depth of 60cm and 10 t/ha poultry manure efficiently controlled the activities of burrowing nematode and therefore improved yield.
The newly released rice variety CO 46 during 1997 is a hybrid derivative of p T7/IR 20. It matures in 125 days with high level of resistance to brown planthopperMBAT mean yield of 6022 kg/ha as against IR 64 in station trials, and adaptive research trials (5395 k It is medium to tall in stature with long panicle and medium size white grain. It is recommended for Periyar and Coimbatore districts as location specific and also BPH endemic areas of other districts in Samba season for Tamil Nadu State.
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