The Responses of Onion and Lily Mitosis to Coumarin and Parasorbic Acid

1947 ◽  
Vol 23 (3-4) ◽  
pp. 292-297
Author(s):  
IVOR CORNMAN
Keyword(s):  
Aqueous Solution ◽  
Benzene Ring ◽  
Lactone Ring ◽  
Saturated Solution ◽  
Saturated Aqueous Solution ◽  
Benzene Derivatives ◽  
Binucleate Cells

1. In Allium and Lilium roots, saturated aqueous solution of coumarin produced a disruption of the metaphase typical of many benzene derivatives, viz. suppression of the spindle, splitting and shortening of the chromosomes, with retarded division of the centromere. The resultant polyploid nuclei and binucleate cells resumed division when the roots were returned to water. 2. Saturated solution of parasorbic acid slowed Allium mitosis, but caused no abnormalities. 3. Both coumarin and parasorbic acid eventually prevented the inception of mitosis, and this suppression of prophases persisted for several hours after removal of the agent. 4. The results are in agreement with prior evidence that in some configurations the benzene ring disrupts mitosis whereas the lactone ring inhibits growth.

Darstellung und röntgenographische Untersuchung von drei Strontiumazidhydraten

1973 ◽  
Vol 137 (4) ◽  
Author(s):  
H. Krischner ◽  
H. E. Roth
Keyword(s):  
Aqueous Solution ◽  
Saturated Aqueous Solution

AbstractThree different hydrates of strontiumazide have been prepared by crystallization from saturated aqueous solution. Sr(N

Observations on the effect of hexoestrol on earthworms and other soil invertebrates

1960 ◽  
Vol 55 (2) ◽  
pp. 189-190 ◽  
Author(s):  
F. Raw
Keyword(s):  
Aqueous Solution ◽  
Soil Fauna ◽  
Lumbricus Terrestris ◽  
Soil Invertebrates ◽  
Saturated Aqueous Solution ◽  
Egg Capsules ◽  
Allolobophora Caliginosa

1. Activity of Lumbricus terrestris, Allolobophora caliginosa and A. chlorotica was unaffected by 15 mg. hexoestrol in solution in 500 g. soil.2. Activity and reproduction of A. caliginosa was unaffected by 10 mg. hexoestrol in 500 g. soil, but 100 mg. and over affected activity and stopped reproduction.3. Egg capsules of A. caliginosa and A. chlorotica developed normally in a saturated aqueous solution of hexoestrol.4. No effect on the soil fauna of grass plots due to grazing with implanted bullocks was observed.

scholarly journals Crystal structure of 5-O-benzoyl-2,3-O-isopropylidene-D-ribono-1,4-lactone

2017 ◽  
Vol 73 (3) ◽  
pp. 407-409
Author(s):  
Adailton J. Bortoluzzi ◽  
Gustavo P. Silveira ◽  
Marcus M. Sá
Keyword(s):  
Crystal Structure ◽  
Benzene Ring ◽  
Absolute Configuration ◽  
Title Compound ◽  
Benzoyl Chloride ◽  
Lactone Ring ◽  
Three Dimensional ◽  
Acylation Reaction ◽  
Compound C ◽  
Dimensional Network

In the title compound, C15H16O6, obtained from the acylation reaction between 2,3-O-isopropylidene-D-ribono-1,4-lactone and benzoyl chloride, the known absolute configuration for the lactone moiety of the ester substituent has been confirmed. The five-membered rings of the bicyclic lactone–dioxolane moiety both show envelope conformations and form a dihedral angle of 19.82 (7)° between the lactone ring and the benzene ring. In the crystal, molecules of the acylated sugar are linked by very weak intermolecular C—H...O interactions, forming a three-dimensional network.

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