"සගන්ධ තෙල්" හි සංශෝධන අතර වෙනස්කම්

 

 

Various essential oils have been used medicinally at different periods in history. [[Medicinal properties|Medical application]] proposed by those who sell medicinal oils range from skin treatments to remedies for cancer, and are often based on historical use of these oils for these purposes. Such claims are now subject to regulation in most countries, and have grown more vague to stay within these regulations.

The techniques and methods first used to produce Ethereal oil (Essential oil) was first mentioned by [[Ibn al-Baitar]] (1188-1248), an [[Andalusian]] [[physician]], [[pharmacist]] and [[chemist]].<ref>http://books.google.com.pk/books?id=7CP7fYghBFQC&pg=PA1011&lpg=PA1011&dq=Al-Djildaki&source=bl&ots=F5JrnpOC95&sig=fCHcNXLa0o0nZl89ccurjM9vL8Y&hl=en&ei=w2DmS7buNZSPOJq-6NsN&sa=X&oi=book_result&ct=result&resnum=1&ved=0CBUQ6AEwAA#v=onepage&q=Al-Djildaki&f=false</ref>

 

 

 

The recondensed water is referred to as a hydrosol, hydrolat, [[herbal distillate]] or plant water essence, which may be sold as another fragrant product. Popular hydrosols include [[rose water]], [[lavender water]], [[lemon balm]], [[clary sage]] and [[orange blossom water]]. The use of herbal distillates in [[cosmetics]] is increasing. Some plant hydrosols have unpleasant smells and are therefore not sold.

Prior to the discovery of distillation, all essential oils were extracted by pressing.

 

Most flowers contain too little volatile oil to undergo expression and their chemical components are too delicate and easily denatured by the high heat used in steam distillation. Instead, a [[solvent]] such as [[hexane]] or [[supercritical carbon dioxide]] is used to extract the oils. Extracts from hexane and other hydrophobic solvent are called ''[[Concrete (perfumery)|concrete]]s'', which are a mixture of essential oil, [[wax]]es, [[resin]]s, and other [[lipophilic]] (oil soluble) plant material.

 

! Oil !! Tonnes

|-

|-

| ''[[Mentha arvensis]]'' || align="right" | 4,800

|-

|-

| [[Cedrus|Cedar]]wood || align="right" | 2,600

|-

|-

|-

| ''[[Litsea cubeba]]'' || align="right" | 2,000

|-

|-

| [[Spearmint]] || align="right" | 1,300

|}

 

Aromatherapy is a form of [[alternative medicine]], in which healing effects are ascribed to the aromatic compounds in essential oils and other plant extracts. Many common essential oils have medicinal properties that have been applied in [[folk medicine]] since ancient times and are still widely used today. For example, many essential oils have [[antiseptic]] properties.<ref>{{cite journal

|pmc=1693916 |doi=10.1186/1472-6882-6-39 |url=http://www.biomedcentral.com/1472-6882/6/39

:{| class="wikitable" |

| valign="top" |

 

* [[Allspice]]

'''<big>[[Seed]]s</big>'''

 

* [[Anise]]

* [[Celery]]

 

* [[Cinnamomum aromaticum|Cassia]]

* [[Sassafras]]

 

* [[Cedrus|Cedar]]

* [[Rosewood]]

* [[Agarwood]]

'''<big>[[Rhizome]]</big>'''

* [[Galangal]]

| valign="top" |

'''<big>[[Leaf|Leaves]]</big>'''

* [[Basil]]

* [[Bay leaf]]

* [[Common sage]]

* [[Melaleuca]]

* [[Oregano]]

* [[Patchouli]]

* [[Peppermint]]

* [[Rosemary]]

* [[Spearmint]]

* [[Thyme]]

* [[Wintergreen]]

* [[Myrrh]]

| valign="top" |

 

* [[Cannabis flower essential oil|Cannabis]]

* [[Chamomile]]

* [[Clary sage]]

* [[Pelargonium|Scented geranium]]

* [[Hops]]

* [[Hyssop]]

* [[Leptospermum scoparium|Manuka]]

* [[Marjoram]]

* [[Ylang-ylang]]

 

* [[Bergamot orange|Bergamot]]

* [[Grapefruit]]

* [[Lime (fruit)|Lime]]

* [[Orange (fruit)|Orange]]

|}

 

{{main|Eucalyptus oil}}

The most well-known essential oil world-wide is eucalyptus oil, produced from the leaves of "[[Eucalyptus globulus]]". Steam-distilled eucalyptus oil is utilized throughout Asia, Africa, Latin America and South America as a primary cleaning/disinfecting agent added to soaped mop and countertop cleaning solutions, possessing insect and limited vermin control properties.

 

{{main|Rose oil}}

The 2nd most well-known essential oil is probably [[rose oil]], produced from the petals of ''[[Rosa damascena]]'' and ''[[Rosa centifolia]]''. Steam-distilled rose oil is known as "rose otto" while the solvent extracted product is known as "rose absolute".

 

<!-- please consider updating the aromatherapy article's section on safety/danger when you update this. -->

 

Essential oils can be aggressive toward rubbers and plastics so care must be taken in choosing the correct handling equipment. Glass syringes are often used but have coarse volumetric graduations. [[Pipette#Pipetting_syringe|Chemistry syringes]] are ideal as they resist essential oils, are long enough to enter deep vessels, and have fine graduations, facilitating quality control. Unlike traditional pipettes which have difficulty handling viscous fluids, the chemistry syringe has a seal and piston arrangement which slides inside the pipette, wiping the essential oil off the pipette wall. This improves accuracy, and the inside of the pipette is easy to clean and reuse immediately. Chemistry pipetting syringes are equal in accuracy to the best laboratory equipment and are available in sizes from 1 mL through 25 mL.

 

The use of essential oils in pregnancy is not recommended due to inadequate published evidence to demonstrate evidence of safety.

 

}}</ref> The internal use of essential oils can pose hazards to pregnant women, as some can be [[abortifacient]]s in dose 0.5–10&nbsp;ml, and thus should not be used during pregnancy.

 

The [[flash point]] of each essential oil is different. Many of the common essential oils such as tea tree, lavender, and citrus oils are classed as a [[HAZMAT Class 3 Flammable Liquids|Class 3 Flammable Liquid]] as they have a flash point of 50–60&nbsp;°C.

 

* [[Volatility (chemistry)|Volatility]]

 

{{Reflist|2}}

 

}}

 

 

[[ar:زيت عطري]]