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Symptoms of poisoning. The chronic toxicity of hexane is attributed to hexane-2,5-dione. The symptoms are tingling and cramps in the arms and legs, followed by general muscular weakness. In severe cases, atrophy of the skeletal muscles is observed, along with a loss of coordination and vision problems. [ 2]
2,4,5-Trichlorophenoxyacetic acid (also known as 2,4,5-T ), a synthetic auxin, is a chlorophenoxy acetic acid herbicide used to defoliate broad-leafed plants. It was developed in the late 1940s, synthesized by reaction of 2,4,5-Trichlorophenol and chloroacetic acid. It was widely used in the agricultural industry until being phased out ...
For 6/6 = 1.0 acuity, the size of a letter on the Snellen chart or Landolt C chart is a visual angle of 5 arc minutes (1 arc min = 1/60 of a degree), which is a 43 point font at 20 feet. [10] By the design of a typical optotype (like a Snellen E or a Landolt C), the critical gap that needs to be resolved is 1/5 this value, i.e., 1 arc min.
The Farnsworth–Munsell 100 Hue Color Vision test is a color vision test often used to test for color blindness.The system was developed by Dean Farnsworth in the 1940s and it tests the ability to isolate and arrange minute differences in various color targets with constant value and chroma that cover all the visual hues described by the Munsell color system. [1]
Infobox references. 4-Amino-3-hydrazino-5-mercapto-1,2,4-triazole is an organic compound with the formula SC 2 N 3 H (NH 2 ) (N 2 H 3 ). The compound consists of a 1,2,4- triazole heterocycle with three functional groups: amine, thioamide and hydrazyl. X-ray crystallography shows that this molecule is polar but with a C=S double bond.
It is a yellow solid [1] with planar molecules [2] that exhibits ferroelectric properties. [3] The compound is a weak acid: one or both hydroxyls can lose a proton to yield the anions C 6 H 3 O − 4 (pK a1 = 2.95) and C 6 H 2 O 2− 4 (pK a2 = 4.87), respectively. The latter forms a variety of metal complexes, functioning as a binucleating ...
Ten-code. Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by US public safety officials and in citizens band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code.[ 1]
Myth #1: A glass of red wine is good for your heart If you believed this myth, we wouldn’t blame you. For decades, studies claimed that red wine had heart health benefits , including a lower ...