Birch Bark


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Birch Bark

 

the outer part of the birch cortex, consisting of easily separated, thin, semitransparent, smooth, white, yellowish, or reddish layers.

The best birch bark is obtained from trunks with a diameter of 20 cm and larger. Such products as tar are obtained by the dry distillation method, and bast boxes, baskets, and dishes are manufactured from birch bark. In ancient times, before the invention of paper, official documents and letters were written on birch bark.

References in periodicals archive ?
She loves maple syrup and anything made out of birch bark, and has hiked in more than 20 national parks.
Birch bark also contains lupeol, betulinic acid, erythrodiol and oleanolic acid and is a low-cost waste product in the veneer and paper industry that is usually burned.
For instance, betulin, the compound that whitens paper birch bark, also deters against desiccation and bacteria, fungi, insects and gnawing animals, and the curious, concentric cracks often found on red maple bark result from repeated cycles of fungal infections and attempts by the bark to wall off, or compartmentalize, the intruders.
After overviews of biorefinery technology, the chemistry of primary and secondary plant metabolites, and the separation and purification of phytochemicals as co-products in biorefineries, coverage in the subsequent 12 chapters includes co-products derived from corn, cereal and oilseed, soy, sugarcane processing, citrus fruit processing, leaf protein, for animal feed, algae, Canadian boreal forest, birch bark, pre-pulping extract, and temperate forests.
The centre also proudly displays the first birch bark canoe to be crafted in the area in seven generations.
The set includes: main centrepiece, oval flower stands, navette-shaped dessert stands, circular dessert stands, silver goblets, sugar vases with ladles, water jugs, candelabras, coracle-shaped salt cellars, Greenland kayak-shaped salt cellars, Canadian birch bark canoe-shaped salt cellars, Fiji islands canoe shaped salt cellars, Egyptian boat-shaped salt cellars with spoons and a New Zealand canoe-shaped salt cellar.
Among the most unusual documents is a letter written on birch bark from the chief of the Ojibwa Native American tribe to pope Leo XIII in the 19th century, calling him: "Grand Master of Prayers, who makes functions of Jesus.
Small touches like cupboard pulls made of knots, an antler to hang your hat on, birch bark frames and anything made from twigs testify that this is the Adirondacks.
Comparably sophisticated thinking characterized European Neandertals, who heated birch bark at high temperatures to make an adhesive for tool handles more than 100,000 years ago, says Stanford University anthropologist Richard Klein.
The new beer is an amber ale brewed with pumpkins grown on Stone Farms, yams, rye, toasted fenugreek, birch bark, and lemon verbena.
In the current pilot study 42 patients with serologically confirmed chronic hepatitis C were treated for 12 weeks with 160 mg of birch bark extract (BBE) (standardised to 75% betulin and 3.
The external shape is still formed the same way and instead of birch bark, we use canvas.