A5064821294- Lichen and fungal ecology
- Bryophyte Studies and Records
- Peatlands and Wetlands Ecology
- Plant Stress Responses and Tolerance
- Aluminum toxicity and tolerance in plants and animals
- Plant Micronutrient Interactions and Effects
- Wheat and Barley Genetics and Pathology
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Analytical Methods in Pharmaceuticals
- Child and Animal Learning Development
- Electrochemical sensors and biosensors
- Heavy metals in environment
- Botany and Plant Ecology Studies
- Heavy Metals in Plants
- Genetics and Plant Breeding
- Language Development and Disorders
- Diatoms and Algae Research
- Language, Discourse, Communication Strategies
- Biocrusts and Microbial Ecology
- Clay minerals and soil interactions
- Aquatic Ecosystems and Phytoplankton Dynamics
- Analytical Chemistry and Chromatography
- Plant Disease Resistance and Genetics
- Radioactive element chemistry and processing
Universidade de Santiago de Compostela
2005-2024
Oregon State University
2011-2015
Universidad de Valladolid
1990-2014
Vanderbilt University
2011-2012
Universitat Autònoma de Barcelona
1987-2002
The effect of a growth reducing chromium VI concentration (9.6 x 10−5M Cr as Na2CrO4) on the structure and ultrastructure different organs bush bean plants (Phaseolus vulgaris L.) grown perlite was studied using light, transmission electron scanning microscopy. structural ultrastructural alterations observed were quite in various analysed did not always stay direct relation to average content whole organ. primary toxicity seemed be membrane damage, due high oxidation power VI. It is...
summary The effect of a growth reducing cadmium concentration (5 μg ml −1 ) on the structure and ultrastructure leaves, stomata plastids bush bean plants ( Phaseolus vulgaris L. cv. Contender) grown perlite was studied using light, transmission electron scanning microscopy. structural ultrastructural alterations observed were not directly related to average Cd content whole organs. In roots, where highest found, plastid hardly affected, while in upper parts plant chloroplasts showed severe...
Abstract Thlaspi caerulescens is a metallophyte that able to hyperaccumulate Zn. In the present study subcellular compartmentation of Zn was investigated in roots and leaves this species by means X‐ray microanalysis. Leaves accumulated higher average concentrations than roots. plants exposed 10 μM Zn, apoplast were similar those vacuoles, while treated with 100 considerably detected vacuoles apoplast. epidermal sub‐epidermal cells from both treatments, mainly and, lesser extent, high...
Abstract Root elongation, hematoxylin staining, and changes in the ultrastructure of root-tip cells an Al-tolerant maize variety (Zea mays L. C 525 M) exposed to nutrient solutions with 20 μm Al (2.1 Al3+ activity) for 0, 4, 24 h were investigated relation subcellular distribution using scanning transmission electron microscopy energy-dispersive x-ray microanalysis on samples fixed by different methods. Inhibition root-elongation rates, cell wall thickening, disturbance...
Abstract The effects of a phytotoxic cadmium concentration (4.45 . 10 −5 M) on the structure and ultrastructure bean plant stems were analysed by light (LM), transmission electron (TEM) scanning microscopy (SEM). Cadmium significantly reduced both number size tracheary elements. Cadmium‐induced dense depositions, which seemed to obstruct partially some xylem vessels, found only in later maturing elements (helical, scalariform or reticulate structure), but not annular structured early...
Abstract This research investigated 12‐month‐olds’ ability to use person‐specific language determine which of several absent things a person is referring. Infants were introduced two experimenters who played separately with different ball. One researcher asked infants retrieve her object when both balls hidden. selected the correct researchers used pronoun my, but failed do so was used. The present provides first evidence comprehension possessive pronouns and indicates that resolve reference.
The present study investigates whether four- and six-year-old children use pragmatic competence as a criterion for learning from someone else. Specifically, we ask others' adherence to Gricean maxims determine they will offer valid labels novel objects. Six-year-olds recognized the of quality relation subsequently trusted provided by maxim adherer. Four-year-olds displayed this pattern when judging but not relation. A linear regression revealed that children's ability identify adherers...
Abstract The influence of a growth stimulating low Cr III concentration (1.0 μM) on chloroplast ultrastructure, the Fe, Cr, and Mn content extracts, o‐phenantroline extractable leaf catalase activity was studied in both Fe‐sufficient Fe‐deficient bush bean (Phaseolus vulgaris L.) plants. Chromium supply hardly affected ultrastructure plants but significantly improved leaves. Generally, did not Fe‐content, increased Fe/Mn ratio chloroplasts. In leaves from plants, Fe increased, while...
The effects of a phytotoxic cadmium concentration (4.45 × 10 −5 M) on the structure primary and secondary pulvini bean (Phaseolus vulgaris L.) leaves were studied by light scanning electron microscopy. Pulvini also analysed for dry weight, water content, cadmium, calcium potassium concentrations. Relatively high amounts Cd accumulated in pulvini. treatment affected Ca more intensively than K concentrations, resulting increased K/Ca molar ratios. Increase density covering, glandular,...
Abstract A carbon paste electrode modified with diphenylcarbazide has been prepared in order to improve the analytical determination of chromium(VI) and chromium(III) using voltammetric techniques. Several parameters, such as carbon/diphenylcarbazide ratio, carbon/Nujol scan rate, accumulation time, etc., have explored. study both chemical species an explanation electrochemical mechanism are presented. When applied assays soil samples, results compared favorably those a polarographic method.
Cysteine-capped thoria nanoparticles resulted to be an excellent material for retention of arsenite and arsenate from aqueous solutions.