Liquid seaweed extract

Liquid seaweed extract (see alsop.l95) is a well-known plant tonic that can be used as a root drip, drench, or foliar spray, to help boost a plant s defenses against pests and diseases. There are a range of other plant-based tonics and stimulants available that are said to have similar effects. They may be worth trying while your garden is adjusting to an organic regimen. 

A weekly dose of high-potash organic liquid fertilizer see pp.l94-195) is necessary for flowering plants and tomatoes. For baskets of herb plants, use a general-purpose liquid fertilizer every two weeks. Seaweed extract added to the fertilizer can be beneficial. 

Feed with a general or potash-rich liquid fertilizer (see pp.194-195) as appropriate. Seaweed extract will give plants a boost. 

M. Miguens-Rodriguez, R. Pickford, J. E. Thomas-Oates, S. A. Pergantis, Arsenosu-gar identification in seaweed extracts using high-performance liquid chromatography/ electrospray ion trap mass spectroscopy, Rapid Common. Mass Spectrom., 16 (2002), 323-331. 

Bromine was formerly obtained from the mother liquid remaining after the separation of sodium chloride from sea-water, a certain proportion of bromine was also extracted from the lixivium of the ash of seaweed, but the proportion in seaweed is small—about one-tenth that of the iodine. The manufacture of bromine from the brine springs of America was commenced at Freeport in 1846 by D. D. Alter and the manufacture from the saline waters about Stassfurt1 was commenced in Germany in 1865. The discovery that bromine could be profitably extracted from the Stassfurt salts reduced the price of that element from about 38s. 0d. to Is. 3d. per lb. 

Seaweed lipids have been analysed both qualitatively and quantitatively, by gas chromatography (GC) and high performance liquid chromatography (HPLC). Most methods for the extraction of seaweed lipids use combinations of chloro-... 

Preparation 42, 106). Seaweed Fvcus species or Ascophyllum nodosum) is hydrolyzed by acids and the neutralized hydrolyzate fermented by galactose-acclimatized yeasts. The solution after evaporation is extracted with alcohol after removal of the alcohol, the extracted material is converted to the difficulty soluble phenylhydrazone. The hydrazine groups are then removed by reaction with benzaldehyde and the sugar is crystallized from the liquid. The fermentation removes the mannose and galactose which often accompany the L-fucose in seaweeds. The mannose is particularly objectionable since it also forms a difficultly soluble phenylhydrazone. 

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