English name: Bromophenol blue sodium salt; 3,3,5,5-Tetrabromophenolsulfonphthalein sodium salt; Sodium Bromophenol Blue
Other names: bromophenol blue sodium
CAS number: 34725-61-6
C19H9Br4NaO5S = 691.94
Level: ACS
Water dissolution test: qualified
PH color change range: 3.0 (yellow) ~ 4.6 (blue purple)
Properties: light red to purple or blue black to black powder. Soluble in water, slightly soluble in ethanol Uses: biochemical research. Biological stain storage: RT
Trekking Poles have become standard equipment for many hikers, trekkers, backpackers and snowshoers. The reasons why are simple: They enhance your stability and support on all types of terrain. When shopping for trekking poles, your key considerations should be weight, price, shock absorption, shaft construction and the type of grip. Here's how to choose.
TYPES OF TREKKING POLES
To start shopping, consider the strength and health of your ankles, knees and hips. You'll also want to keep in mind whether you'll be using your poles on rugged or relatively flat terrain and the amount of weight you typically carry in your pack.
Poles can be categorized as follows:
Antishock poles: These offer internal springs that absorb shock when you walk downhill. With most poles, this feature can be turned off when it's not needed such as when you're walking uphill. The antishock feature is recommended if you have weak or damaged ankles, knees or hips. It adds a bit to the cost of the poles.
Standard poles: These do not have the antishock feature and are lighter and less expensive as a result. While they don't absorb as much impact as antishock poles when going downhill, they do provide a similar level of balance and support.
Compact or women's poles: These are shorter and have smaller grips for hikers with smaller hands. They are easier to swing because they weigh less and are also simpler to pack. Youth poles for kids are also available.
Hiking staff: Sometimes called a walking staff or travel staff, this is a single pole that's most effective when used on relatively flat terrain and with little or no load on your back. Hiking staffs are adjustable and some include the antishock feature. They may also include a built-in camera mount under the handle that can be used as a monopod.
Nordic Walking Poles: Long established in Europe, Nordic walking is gradually becoming popular in the U.S., too. It's a social activity that offers a total body workout. Nordic walking poles are a modified version of trekking poles.
Folding Hiking Stick,Trekking Poles,Walking Stick,Walking Poles
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