[Latin Name] Polygonum Cuspidatum Sieb. et Zucc

[Plant Source] China

[Specifications] Resveratrol 50%, 95%, 98% by HPLC

[Appearance]Brown or white fine powder

[Plant Part Used] Rhizome&Root

[Particle size] 80 Mesh

[Loss on drying] ≤5.0%

[Heavy Metal] ≤10PPM

[Storage] Store in cool & dry area, keep away from the direct light and heat.

[Package] Packed in paper-drums and two plastic-bags inside.

[General feature]

1.100% natural source. Our resveratrol is 100% extracted from natural herb, very safe and more bioactive, which is rich with both CIS-resveratrol and trans-resveratrol.

2.Our resveratrol almost have no unpleasant taste compare to other resveratrols and it can be easier to take by oral.

3.We offer resveratrol at a very competitive price with superb quality.

4.We have a very large output and could manufacturer as customer particular requirement.

[Function]

Resveratrol is an active component extracted from Huzhang (Polygonum cuspidatum) in China.

It is an antioxidant phenol and a potent vasodilator that inhibits serum triglyceride synthesis, lipid peroxidation, and platelet aggregation.

It is extensively used for treatment of blood vessel disease such as atherosclerosis and hyperlipidemia. In addition, it has anti-virus and anti inflammatory activity, can treat acute microbial infections and viral hepatitis.

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Changes in temperature in the natural environment of plants affect both their functioning and their growth. Maintenance of a relatively stable internal environment is just as important for plant metabolism as it is for animals. Plants respond to changes in light, water availability and temperature, all of which are linked, since heat is often associated with light (for example, the radiant energy of sunlight). Most plants have a growth season and life cycle that follow the seasonal temperature variations of their environment. Low availability of water may also be associated with very cold temperatures, since frozen water (ice and snow) is not available for use by plants. Temperatures above 40°C may cause damage to proteins and those above 75°C to chlorophyll pigment within the plant. Since plants cannot move into the shade- they tend to have stronger physiological and structural adaptations. Reflective leaf surfaces that reduce the amount of radiation absorbed can help keep a plant cool in hot conditions. Leaves may be light or silvery coloured, or have waxy or shiny surfaces. Evaporative cooling – loss of water via transpiration (stomata opening) in order to evaporate and have a cooling effect on the plant. This decreases internal temperature, however if water is not readily available this can kill the plant. Hot areas are often dry, compromising evaporative cooling—a plant needs to strike a fine balance between the risks of excess water loss during cooling versus heat build-up during water conservation. Wilting – some plants can wilt during the day instead, which decreases surface area of flowers/leaves to the sun. If water is readily available, this is temporary. If water not available, this can lead to the death of the plant. For example, roses. Leaf orientation – Plants change the orientation of their leaves to decrease the surface area exposed to the sun at the hottest part of the day. Most eucalypts hang vertically to reduce their exposure to the hot sun. Plants responding to excessive temperature like fires, may die, (especially non woody plants), however they leave dormant seeds, with thick protective seed coats. Seed dispersal in some Australian plants is stimulated by the extreme heat of fire. Banksia, Hakea and some Eucalyptus plants bear fruits with hard woody cases that are not dropped from the parent plant. The heat of a fire stimulates the fruits to open, and the seeds are released. Some of these seeds need fire as a trigger to germinate (begin to grow a seedling). Or some plants may die above ground leaving roots, rhizomes, bulbs or tubers to survive underground. When favourable conditions return, these sprout. Leaf fall in Summer. Eucalypts are evergreen trees that drop some of their leaves during the dry season in hot climates to reduce the surface area exposed to absorb heat. This also reduces the risk of losing too much water by transpiration. Temperature is one factor that controls developmental changes in a plant’s life cycle, from germination through to flowering and seed dispersal. In Australia, too high a temperature during flower formation produces a poor wheat crop, because pollen formation is very temperature-sensitive. Leaf fall in autumn (deciduous trees)
Many trees lose their leaves during autumn and the cold winter months when resources (for example the sun and water) are not as readily available. It allows them to survive not only the extremely low temperatures, but also the water shortages and lower availability of sunlight. For example, the beech tree found in Tasmania. Organic anti-freeze – Normally, in cold conditions, water between cells freezes first posing the greatest risk of damage for plants. Some plants that live in extremely cold conditions produce anti-freeze substance that reduces the temperature at which the cytoplasm or cell sap freezes. Frost during periods of new growth may damage plants, but many plants have leaves that are frost-tolerant. For example, after frost the leaves of camellias appear semi-transparent, but on thawing return to normal. Plants may alter their growth rate, active plant growth can occur within the range 5°C-45°C or in tropical areas, growth may cease below 15°C. Vernalisation some plants flower in response to low temperatures for example, tulip bulbs must be exposed to between 6 weeks and 3 months of intense cold before they will flower. Australian gardeners often mimic this effect by removing tulip bulbs from the ground in winter and storing them in the refrigerator, before replanting them in spring, to ensure that they will flower. Plants must also maintain a relatively stable internal environment. Since plants cannot move – they tend to have stronger physiological and structural adaptations. For heat some adaptations include wilting and dropping leaves. For cold some include: frost tolerance and being deciduous.