الفهرس 
REVIEW of LITERATUREOnly 14 pages are availabe for public view
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Abstract
The present study was carried out in Sabahia Horticulture Research Station, Alexandria, Egypt, through the two successive season of 2010/2011 and 2011/2012. Two storage experiments in ambient atmosphere were conducted using (ND) and (AD) spearmint and peppermint herbs. The packaging types (p.s), (p.d), (p.s+po) and (p.d+po), were tested. The experiment started on it October 2010 and October 2011 (12 months each). During each season of storage, the herb was sampled once every 3 months (5 samples). The essential oil % was determined by water distillation and the components of the oil were determined by (G.L.C).
Results of this study can be summarized as follow:
1- Artificial drying (AD) is fare better to keep the essential oil of spearmint and peppermint herbs at the (AL) in the storage.
2- AD kept the major components of herbs, carvon, menthone and menthol better than (ND). As will as the microbial load at low level.
3- ND saved α-pinene, β-pinene and limonene at high level than (AD).
4- Extended storage period resulted in the reduction of all the studied components of the two herbs.
5- Packaging containing polyethylene (po) showed superiority in their keeping capacities to their contents among all the tested ones.
6- (p.d+po) Packaging :
• saved the spearmint and peppermint oil % in the (AL) for 6-9 months in (ND) method, and for 9-12 months using (AD).
• α- pinene was saved for 6-9 months with (ND) and 9 months for the (AD).
• β- pinene was saved for 6-9 months with (ND) and 6 months with AD.
• Limonene kept at (AL) for 12 months with (ND) and 9-12 months with (AD).
• Carvone was saved for 6-9 months with (ND) and 9 months with (AD).
• Menthon was saved for 9-12 months with (ND) and 12 months with (AD).
• Mnethol was kept for 6-9 months with (ND) and 12 months with (AD).
• In both (ND) and (AD) the packaging saved the microbial load (fungi and bacterias) in a low standard through the 12 months of the experiment.
7- (p.s+po) Packaging:
• Saved the spear and peppermints oil % at the (AL) for 6-9 months (spearmint) and 3-6 months in peppermint with (ND) and 9-12 months in (AD) for both.
• α-pinene was saved for 3-6 months with (ND) and 9-12 months with (AD).
• β-pinene was saved with both (ND) and (AD) for 6-9 months.
• Limonene was saved in (ND) and (AD) for 9-12 months.
• Carvon in spearmint in (ND) was saved for 3-6 months and with (AD) for 9 months.
• Menthone was kept at the (AL ) for 6-9 months and 9-12 months with (AD) in peppermint.
• Menthol was kept for 3-6 months with (ND) and for 6 months with (AD).
• Microbial load was kept at the lowest level than the other packagings through the 12 months of the experiment.
8- (P.d) Packagings:
• saved the spearmint and peppermint essential oil % at the (AL) for 3-6 months with (ND) and for 6-9 months for (AD).
• Saved α-pinene for 3-6 months with (ND) and for 6-9 months with (AD).
• Kept β-pinene for 6 months with (AD) and (ND).
• Kept limonene for 9 months with (ND) and for 9-12 months with (AD).
• Kept carvon for 3 months only in both drying methods.
• Kept the menthone at the AL for 3-6 months with (ND) and for 6- 9 months with (AD).
• Saved the menthol for 3-6 months with (ND) and for 6 months with (AD).
• The microbial load was kept at the AL through the experiment for both drying methods.
9 - (P.s) Packagings:
• saved the essential oil % of spearmint and peppermint for 3 months with (ND) and for 6 months with (AD).
• Saved α-pinene for 3-6 months with (ND) and for 6 months with (AD).
• Kept β-pinene for 6 months with both (AD) and (ND).
• Kept limonene for 9-12 months for both drying methods.
• Kept carvon for 3 months with both drying methods.
• Kept the menthone for 3-6 months in both drying methods
• Saved the menthol for 3-6 months in both drying methods
• The microbial load was kept at the AL through the experiment for both drying methods.
from the above mentioned it could be recommended that;
1- Artificial drying of spearmint and peppermint herbs is recommended to store the herb for long time, more than (ND).
2- Using packaging containing polyethylene extended the storage period, kept the essential oil and its major components at the AL for longer time.
3- Medicinal herbs traders when they expect selling their commodities within 6 months, they can air dry the herbs but when the expect ceiling it after 9-12 months they can artificial drying it.