OBJECTIVE Vernonia amygdalina (V. amygdalina) leaf is locally employed in the Southern region of Nigeria in the treatment of malaria infection. This study evaluated the in vivo antiplasmodial, antioxidant and immunomodulatory effect of ethanol extract of V. amygdalina leaf. MATERIALS AND METHODS The active principles of the dried leaf were extracted with ethanol. For quality validation, chemi...

The potential of an experimental imaging spectroscopy system with high spatial (0.16–0.28 mm2) and spectral resolution (5–13 nm) was explored for early detection of nitrogen (N) stress. From June through October 2000, a greenhouse experiment was conducted with 15 Lolium perenne L. mini-swards and 5 N treatments. Images were recorded twice a week. With the experimental system, spectra of grass l...

the ir and nmr spectra were coupled with quantum chemical calculations in dft approach usingthe hybrid b3lyp exchange-correlation functional to confirm the structure of 2-methoxycarbonyl-7-methyl-1,3-thiazino[3,2-b][1,2,4]triazine-4,8-dione 2d.

Cold injury (CI) causes irreversible damage to tea plants, which results in decline the quality of famous teas and huge economic loss. A new, quick, non-destructive method is provided assess CI leaf based on terahertz (THz) spectroscopy. Absorbance samples was measured with THz spectroscopy frequency bands from 0.1 1.6 under low temperature treatments 4.0, 0, −2.5, −5.0, −7.5, −10.0 °C. Fast Fo...

Article history: Received 4 October 2015 Received in revised form 18 May 2016 Accepted 28 May 2016 Available online xxxx The remotemonitoring of plant canopies is critically needed for understanding of terrestrial ecosystemmechanics and biodiversity as well as capturing the shortto long-term responses of vegetation to disturbance and climate change. A variety of orbital, sub-orbital, and field ...

The morphological and biochemical properties of plant canopies are strong predictors of photosynthetic capacity and nutrient cycling. Remote sensing research at the leaf and canopy scales has demonstrated the ability to characterize the biochemical status of vegetation canopies using reflectance spectroscopy, including at the leaf level and canopy level from air- and spaceborne imaging spectrom...

Fluorescence, Delayed Fluorescence, Photosystem I The changes in the fluorescence and delayed fluorescence intensity of spinach leaf as affected by temperature were studied. It was observed that the delayed fluorescence showed a maximum at about 45 °C whereas the fluorescence maximum was at about 55 °C. An examination of the emission spectra of delayed fluorescence at different temperatures sho...

The 1H-NMR methodology used in the study of genetically modified (GM) foods is discussed. Transgenic lettuce (Lactuca sativa cv "Luxor") over-expressing the ArabidopsisKNAT1 gene is presented as a case study. Twenty-two water-soluble metabolites (amino acids, organic acids, sugars) present in leaves of conventional and GM lettuce were monitored by NMR and quantified at two developmental stages....

Assistant Professor of Botany, The Hebrew University, Jerusalem, Israel; and Professor, Department of Botany, University of California, Davis, California. Abstract: Matorral/chaparral and phrygana/ coastal sage vegetation types of Israel and California exhibit major differences in life form spectra, physiognomy, species richness, fire adaptations, spinescence, and leaf traits. In some cases it ...