Zobrazeno 1 - 10
of 114
pro vyhledávání: '"B.Z. Siegel"'
Autor:
B.Z. Siegel
Publikováno v:
Water, Air, and Soil Pollution. 88:203-204
Autor:
B.Z. Siegel, S.M. Siegel
Publikováno v:
Advances in Space Research. 1:27-36
The adsorptive and/or catalytic properties of clays, silicates in general, and other minerals are well known. More recently, their probable role in prebiotic syntheses of bio-organic compounds has become a matter of record. We demonstrate that, in ad
Publikováno v:
Phytochemistry. 21:539-542
Among 11 Brassica and 10 Cucumis cultivars and one each of Carica papaya and Zea mays grown in various dilutions of seawater, there is no consistency of change in peroxidase activity when assayed on a fr. wt basis. In contrast, on a total protein bas
Short-term and long-term clinostat and vibration-induced biochemical changes in dwarf Marigold stems
Autor:
B.Z. Siegel, S.M. Siegel
Publikováno v:
Advances in Space Research. 3:241-245
Stems of 21-day dwarf Marigold plants cultivated on the clinostat were compared with plants cultivated on vertical axis rotators ("vibrational controls") and stationary controls for long-term changes in cell wall composition. Stems of 21-day plants g
Autor:
S.M. Siegel, B.Z. Siegel
Publikováno v:
Bioinorganic Chemistry. 6:341-345
Potassium-deficient cucumber seedlings are more sensitive to thallium than are those receiving exogenous potassium. Limiting potassium, short of an overt expression of deficiency, increased the sensitivity of the plants to thallium and further demons
Autor:
B.Z. Siegel, S.M. Siegel
Publikováno v:
Bioinorganic Chemistry. 4:93-97
The presence of K-ion prevents inhibition of Plantago maritima seed germination and Asperigillus flavus mycelial growth by Tl-ion. The effect of potassium could not be replaced by Na-ion in either system. Aspergillus was cultured in a medium low in l
Publikováno v:
Advances in Space Research. 3:39-42
On the edge of Don Juan Pond in the Wright Valley of Antarctica lies a mat of mineral and detritus cemented by organic matter. In spite of a CaCl2 concentration of about 33% (w/v), the mat contains Oscillatoria and other cyanobacteria, unicellular fo
Autor:
B.Z. Siegel, S.M. Siegel
Publikováno v:
Advances in Space Research. 3:135-139
Beyond their role in the cycling of the major elements, carbon, nitrogen, oxygen, etc., little is known about geobiological interactions involving plants with the elements of lower abundance. Plants influence the distribution of volcanic mercury by u
Autor:
B.Z. Siegel, S.M. Siegel
Publikováno v:
Bioinorganic Chemistry. 6:229-232
When a number of Group 1A chlorides were added to yeast solutions which were inhibited by 20 mM Tl+, the greatest restorative effect was shown by KCl, with a lesser effect by NH4Cl. Sodium, rubidium and cesium chlorides had no significant effect on T
Autor:
S.M. Siegel, B.Z. Siegel
Publikováno v:
Organic Geochemistry. 5:255-257
The mercury contents of Equisetum, Plantago and Taraxacum growing in the Prince George area of British Columbia varied with soil mercury level. In contrast, mercury in the same plant species growing around Mount St. Helens was soil-concentration inde