Phytotoxicity of Pb: II. Changes in Chlorophyll Absorption Spectrum due to Toxic Metal Pb Stress on Phaseolus mungo and Lens culinaris

2006 ◽  
Vol 9 (11) ◽  
pp. 2062-2068 ◽  
Author(s):  
Saba Haider ◽  
Salma Kanwal . ◽  
Fahim Uddin . ◽  
Rafia Azmat .
Keyword(s):  
Absorption Spectrum ◽  
Lens Culinaris ◽  
Toxic Metal ◽  
Pb Stress ◽  
Phaseolus Mungo ◽  
Chlorophyll Absorption

scholarly journals The ways and means of Express-diagnostics of plants for protected ground

2019 ◽  
pp. 4-7
Author(s):  
Elena Mikhailovna Basarygina ◽  
Evgenia Alexandrovna Zakharova ◽  
Alexander Vladimirovich Shershnev ◽  
Elena Olegovna Gorshkova ◽  
Denis Viktorovich Davydov
Keyword(s):  
Absorption Spectrum ◽  
Arithmetic Mean ◽  
Rapid Diagnosis ◽  
Mineral Wool ◽  
Plant Leaves ◽  
Mean Values ◽  
Experimental Variant ◽  
Carotenoid Absorption ◽  
Chlorophyll Absorption ◽  
Production Conditions

The article deals with the results of studies related to the testing of the proposed method of rapid diagnosis of plants conducted in the production conditions of Agrocomplex "Churilovo". It was found that the absorption spectrum of the leaf apparatus of cucumber plants in the control variant (substrate – mineral wool) and the experimental variant (substrate - agroperlite) differed insignificantly: the arithmetic mean values of chlorophyll absorption in the control and experiment were 3,668 and 3,772, respectively; carotenoid absorption - 3,560 and 3,403; cytochrome absorption - 2,681 and 2,645, respectively. There were minor differences in the content of micro - and macronutrients in plant leaves and yield. It is revealed that the proposed method of rapid diagnosis, based on the analysis of the absorption spectra of the sheet apparatus, allows to obtain results comparable to the results of chemical analysis and yield assessment, and can be used to diagnose the condition of plants.

The Reaction of Brain Structures with OsO4-Zinc-Iodide Stain

1971 ◽  
Vol 29 ◽  
pp. 272-273
Author(s):  
Werner J. Niklowitz
Keyword(s):  
Electron Microscope ◽  
Structural Changes ◽  
Mossy Fiber ◽  
Toxic Metal ◽  
Staining Technique ◽  
Brain Structures ◽  
Oxidase Inhibitor ◽  
Fiber Layer ◽  
Hippocampal Tissue ◽  
Zinc Iodide

After intoxication of rabbits with certain substances such as convulsant agents (3-acetylpyridine), centrally acting drugs (reserpine), or toxic metal compounds (tetraethyl lead) a significant observation by phase microscope is the loss of contrast of the hippocampal mossy fiber layer. It has been suggested that this alteration, as well as changes seen with the electron microscope in the hippocampal mossy fiber boutons, may be related to a loss of neurotransmitters. The purpose of these experiments was to apply the OsO4-zinc-iodide staining technique to the study of these structural changes since it has been suggested that OsO4-zinc-iodide stain reacts with neurotransmitters (acetylcholine, catecholamines).Domestic New Zealand rabbits (2.5 to 3 kg) were used. Hippocampal tissue was removed from normal and experimental animals treated with 3-acetylpyridine (antimetabolite of nicotinamide), reserpine (anti- hypertensive/tranquilizer), or iproniazid (antidepressant/monamine oxidase inhibitor). After fixation in glutaraldehyde hippocampal tissue was treated with OsO4-zinc-iodide stain and further processed for phase and electron microscope studies.

Synthesis, performance and growth mechanism of silver nanoparticle coated SERS fiber probe

2019 ◽  
Vol 107 (3) ◽  
pp. 305
Author(s):  
Mengmei Geng ◽  
Yuting Long ◽  
Tongqing Liu ◽  
Zijuan Du ◽  
Hong Li ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Absorption Spectrum ◽  
Reaction Time ◽  
Growth Mechanism ◽  
Fiber Optic ◽  
Fiber Optic Probe ◽  
Visible Absorption ◽  
Fiber Probe ◽  
Surface Enhanced Raman ◽  
Optic Probe

Surface-enhanced Raman Scattering (SERS) fiber probe provides abundant interaction area between light and materials, permits detection within limited space and is especially useful for remote or in situ detection. A silver decorated SERS fiber optic probe was prepared by hydrothermal method. This method manages to accomplish the growth of silver nanoparticles and its adherence on fiber optic tip within one step, simplifying the synthetic procedure. The effects of reaction time on phase composition, surface plasmon resonance property and morphology were investigated by X-ray diffraction analysis (XRD), ultraviolet-visible absorption spectrum (UV-VIS absorption spectrum) and scanning electron microscope (SEM). The results showed that when reaction time is prolonged from 4–8 hours at 180 °C, crystals size and size distribution of silver nanoparticles increase. Furthermore, the morphology, crystal size and distribution density of silver nanoparticles evolve along with reaction time. A growth mechanism based on two factors, equilibrium between nucleation and growth, and the existence of PVP, is hypothesized. The SERS fiber probe can detect rhodamin 6G (R6G) at the concentration of 10−6 M. This SERS fiber probe exhibits promising potential in organic dye and pesticide residue detection.

Modeling of Short-Millimeter-Wave CMOS Transmission Line with Lossy Dielectrics with Specific Absorption Spectrum

2013 ◽  
Vol E96.C (10) ◽  
pp. 1311-1318 ◽  
Author(s):  
Kyoya TAKANO ◽  
Shuhei AMAKAWA ◽  
Kosuke KATAYAMA ◽  
Mizuki MOTOYOSHI ◽  
Minoru FUJISHIMA
Keyword(s):  
Absorption Spectrum ◽  
Transmission Line ◽  
Millimeter Wave ◽  
Specific Absorption ◽  
Lossy Dielectrics

Effect of Pb stress on growth and quality of K326 and Honghuadajinyuan flue-cured tobacco

2011 ◽  
Vol 37 (2) ◽  
pp. 127-130
Author(s):  
Xi-yu CHEN ◽  
Ji-heng ZHOU ◽  
Shao-kun WANG ◽  
He ZHOU ◽  
Wei HE ◽  
...  
Keyword(s):  
Pb Stress

The Effect of Active Principles of Lyophilized Garlic and Chlorella on Reduction of Tissue Bioaccumulation and Lead Antagonism to Zinc in Carassius gibelio

2017 ◽  
Vol 68 (9) ◽  
pp. 2006-2009
Author(s):  
Marioara Nicula ◽  
Nicolae Pacala ◽  
Isidora Radulov ◽  
Mirela Ahmadi ◽  
Dorel Dronca ◽  
...  
Keyword(s):  
Protective Effect ◽  
Aquatic Environment ◽  
Toxic Metal ◽  
Antagonistic Effect ◽  
High Concentration ◽  
Carassius Gibelio ◽  
Liver And Kidney ◽  
Living Organisms

In living organisms lead is classified as potential toxic metal, and in high concentration can produce intoxication with the alteration of some vital organs, especially liver and kidney. In aquatic environment lead can be absorbed by fishes and other organisms, with different distribution in various tissues. Our aim of experiment was to verify and demonstrate the protective effect of lyophilized garlic and chlorella against bioaccumulation of lead in fishes living in aquatic environment deliberated polluted with lead. Thus, lyophilized garlic and chlorella administrated as supplements in fodder for fishes (Carassius gibelio) diminished the antagonistic effect of lead against zinc in all tested tissues: liver, kidney, heart, brain, ovary, testis, muscles myotome � epaxial, skin � with scales, gills, and intestine.

Sign in / Sign up

Export Citation Format

Share Document