Recent Entries

  • What can go wrong with inhaling too much formaldehyde?

    When should formaldehyde be removed (去除甲醛服務)? At very low concentrations (eg, 0.3 ppm), previously susceptible individuals may develop severe bronchoconstriction. Bronchoconstriction may begin immediately or be delayed by 3 to 4 hours; effects may worsen up to 20 hours after exposure and persist fo...
  • How does formaldehyde affect the body? Seriously more...

    Physical properties of formaldehyde Description: Almost colorless gas with a pungent, pungent odor WARNING FEATURES: Odor is detectable below 1 ppm, but many sensitive individuals experience symptoms below the odor threshold. Molecular Weight: 30.0 Daltons Boiling Point (760 mm Hg): - 6°F (-...
  • What birthday flowers are there in the second half of the year?

    September Birth Flowers: Aster and Morning Glory September's birth flowers are aster and morning glory. Aster, also known as star grass or frost flower, is a symbol of omnipotent love, affection and wisdom. Asters are available in a variety of colors, but the most common are pink, white, red, laven...
  • Progress from Self-taught Japanese to Japanese Courses

    In the beginning, it was very difficult to learn Japanese by myself. I only knew a little about reading and listening to the material, thinking that I would never know Japanese. Until we found a Japanese class in Hong Kong (香港日文班), we followed the curriculum set by the teacher when we learned Japane...