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Wednesday, July 29, 2020 | History

2 edition of effect of light on the inherent E. M. F. of Valonia ventricosa ... found in the catalog.

effect of light on the inherent E. M. F. of Valonia ventricosa ...

Gordon Marsh

effect of light on the inherent E. M. F. of Valonia ventricosa ...

by Gordon Marsh

  • 308 Want to read
  • 20 Currently reading

Published in Washington .
Written in English

    Subjects:
  • Valonia (Algae),
  • Light -- Physiological effect.

  • Edition Notes

    StatementBy Gordon Marsh ...
    SeriesIn Carnegie institution of Washington. Tortugas laboratory. Papers.
    Classifications
    LC ClassificationsQH301 .C3 vol. 32
    The Physical Object
    PaginationVol. XXXII, p. [65]-84, [99]-120
    Number of Pages120
    ID Numbers
    Open LibraryOL6441215M
    LC Control Number42025135
    OCLC/WorldCa1832931

    Lightning Phenomenon, Effects and Protection of Structures from Lightning Sanketa Shivalli PG student, Power systems branch, NIE college, Mysuru In such instances, the observer may see only a flash of light without thunder. The "heat" portion of the term is a folk association between locally experienced warmth and the distant lightning flashes.   At first sight, the diversity of Astbury’s studies in the s and 40s, ranging from hair keratin to Valonia and pneumococcal cell surface polysaccharides, can look undisciplined. But a letter that he wrote in October to F.B. Hanson, assistant director in the Natural Sciences Division at the Rockefeller Institute, reveals the unifying.

    Here, we tested the effects of reduced blue light exposure in young healthy subjects (n = 15) by using soft orange contact lenses (SOCL). We showed (as expected) that a reduction in the melatonin suppressing effect of light is observed when subjects wear the SOCL. However, after chronic exposure to reduced (short wavelength) light for two. light from to hr. Zero, four, eight, and twelve hours of supplemental light were provided for the 8, 12, 16, and 20 hr photoperiod, respectively. Light source was watt incandescent light bulbs at an irradiance of 11 µmol/s/m 2 at plant height. Average minimum and maximum greenhouse temperatures were 18 and °C.

    For this article, we interviewed Postdoctoral Researcher Leena Tähkämö, whose article on the effects of light on the human circadian rhythm has just been published in the Chronobiology International magazine. Leena Tähkämö, Timo Partonen & Anu-Katriina Pesonen (): Systematic review of light exposure impact on human circadian rhythm. I have no proof of this at all, but I'm pretty certain if it's a single cell it would have to be many organelles of somewhat normal size. The effects of surface area-volume ratios would not permit something to have an inch long mitochondria, for example.


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Effect of light on the inherent E. M. F. of Valonia ventricosa .. by Gordon Marsh Download PDF EPUB FB2

Get this from a library. The effect of light on the inherent E.M.F. of Valonia ventricosa. [Gordon Marsh]. Plant Physiol. 8: HAAKE, 0. Uber die Ursachen electrischer Strome in Pflanzen. Flora MARSH, G. The effect of light on the inherent EMF of Valonia ventricosa.

Intensity and time relations. Carnegie Inst. Washington Pub. The effect of light on the inherent EMF of Valonia ventricosa. Membranes of Valonia ventricosa: apparent absence of water-filled pores.

Gutknecht J. Osmotic and diffusional permeabilities to water have been measured in internally perfused cells of Valonia ventricosa. The osmotic and diffusional permeability coefficients for the protoplast are identical, x 10(-4) centimeter per by: Transcellular Au+ in Valonia ventricosa and Its Effect on Delayed Fluorescence M.

GYENES Department of Biophysics, Faculty of Biology, Moscow State University, MoscowUSSR Abstract. The possible effect of the illumination-induced transcellular H+-gradient between the central vacuole and the external medium, on both the.

Effect of light on sodium influx, membrane potential, and protoplasmic streaming in NiteUa. Plant Physiol. Effect of light on the inherent E.M.F. of Valonia ventricosa. Carnegie Inst. Wash., Papers from Tortugas Lab. Factors affecting the fluxes of Author: John Gutknecht.

/ G. Marsh --The Growth of Valonia ventricosa J. Agardh and Valonia ocellata Howe in culture / F.C. Steward --The Effect of light in the inherent E.M.F. of Valonia ventricosa. In this study, the effects of bright light (BL) on the rhythms in body temperature, plasma melatonin, plasma cortisol and subjective alertness, in 34 shift work nurses at a university hospital were assessed.

They were exposed to very BL (4 lx) during 2 breaks (– and –) or dim light. The Wall of Valonia ventricosa 77 This conception of the existence of cellulose in long molecular chains has arisen from the examination of the secondary walls of plants, but as yet no direct experimental determinations have been possible of its structure in primary walls where it is known to occur (e.g.

in Viciafaba, see Tupper. The current-voltage (I/V) profiles of Ventricaria (formerly Valonia) membranes were measured at a range of external potassium concentrations, [K+]o, from to mm. By injuring cells ofValonia ventricosa, one of two survival strategies — wound-healing and protoplast formation — is induced.

The present study revealed that turgor pressure, as well as Ca2+ in bathing medium, is involved in the choice between these survival strategies. On the process of wound-healing, turgor pressure is recovered in the presence of both the wound plug, which closes the.

This effect is what is responsible for mirages seen on hot days where the changing index of refraction of the air causes the light rays to bend creating the appearance of specular reflections in the distance (as if on the surface of a pool of water).

Taking advantage of the principle of refraction, devices can be built that can focus light. The steady-state fluorescence yield (F S) was monitored continuously and a 1, ms pulse of saturating light was supplied at intervals of 60 s to determine the maximum variable fluorescence (F M ′).

The Φ(PSII) at steady state was defined as (F M ′ – F S)/F M ′, as proposed by Genty et al. LIGHT affects the activity of several endocrine organs of higher vertebrates.

In birds the phenomenon usually requires a sufficiently long photoperiod, in some cases the response is intensity. the effects of blue light on the regulation of physiologic func - tion and the effects of blue light exposure on ocular health. Finally, we discuss the available data to determine whether long-term exposure to blue light is safe or whether additional studies are needed to fully understand the effects of blue light exposure on ocular health.

Brown, O., Relation between light and the electric polarity Effect of temperature upon the inherent potential ofValonia.

Carnegie Inst. Washington Pub. Papers from Tortugas Laboratoty31, 1–16, Google Scholar; —, The effect of light on the inherent E. ofValonia ventricosa. Intensity and time relations.

Methods Cell Physiol 1: LAINSON R, CP FIwLD Electrical properties of Valonia ventricosa. J Membr Biol MAcRoBBIE EAC, J DAINTY Ion transport in Nitellopsis obtusa J Gen Physiol MARSH G Effect of light on the inherent EMF of Valonia ventricosa. Intensity and time relations.

The effects of low levels of light at night upon the endocrine physiology of western scrub‐jays (Aphelocoma californica) LAN resulted in depressed T levels in females, although there was no effect on T in males.

E 2 levels in both sexes were lower under LAN than under an unlighted dark‐phase. Paradoxically, MEL was higher in jays under. Centciurea solstitialis L. is a winter annual weed of Eurasian origin that is widespread in the western United States.

Capitula produce dimorphic achenes that are dispersed at different times. Factors investigated in the laboratory that affected germination were light, temperature, achene type (plumed and nonplumed), collection date, dormancy, and storage. Book review Full text access The new frontiers in plant biochemistry, T.

Akazawa, T. Asahi, H. Imaseki (Eds.). Japan Scientific Societies Press / Martinus Nijhoff/Dr. The light treatment conditions were 24±2°C, h photoperiod at µmol m-2 s-1 PPFD.

Plants were cultivated under the respective light quality conditions for 70 days. The elongation of the main and lateral shoots were significantly reduced under blue and combined lights.

The growth of lateral shoots was significantly reduced under the blue. Abstract. Studies were made on the electric potentials of the plasmalemma (E co) and tonoplast (E vc) in small cells ( mm diameter) of Valonia measure E co, microelectrodes with long tapers were inserted into the vacuole with the path of electrode entry microelectrode then was pushed across the vacuole and into the cytoplasm on the opposite side of the cell.Spectra of the Cellulose from the Cell Wall of Valonia ventricosa.

Journal of Applied Physics 41(11), J. PROTZMANN, A. BECKER, B. VALLÈS-PÀMIES, R. NEALE, S. E. HILL (). Effect of the Extent of Conversion and Retrogradation on the Digestibility of McGraw-Hill Book Company, Maidenhead.

[GORAL und ZICHY ] J. GORAL, V.J.-F. Revol's 59 research works with 2, citations and 1, reads, including: Single crystals of bacterial and synthetic poly(3-hydroxyvalerate).