Guide: After the volumetric flask is purchased, it must be cleaned and calibrated; so that it will be used only after the calibration is qualified...1. After the volumetric flask is purchased, it must be cleaned and calibrated to be used only after the calibration is qualified.2. Substances that are

As for beauty care, I can only share it with you from the book:
1. Ayurvedic cosmetology:
Individual skin type, skin state and skin cell organization will determine skin aging, wrinkles, skin relaxation, dry crack and other problems.
Generally speaking, if the skin is thin, it is dry skin, and it is

Guide: The instruments that are often used in experiments should be washed and dried for use after each experiment. Different experiments have different requirements for drying. Generally, beakers, conical flasks and other instruments used for quantitative analysis can be used after washing. In

Organic chemistry laboratory glass apparatus can be divided into ordinary glass instruments and ground glass apparatuses. Standard interface glassware is a glassware with a standardized ground mouth or ground plug. Due to the standardization, systematization and matte tightness of the instrument plu

Frigid weather is the time when the hot water bottle comes into play, but using the hot water bottle as a simple heating device is a bit overkill. In fact, it also has many unexpected health care uses.1. Promote wound healingI poured warm water into the hot water bag and put it on my hand. At first,

Is the hot water bottle washable?When the surface of the hot water bottle is dirty, remember not to wash it with soap, the best choice is to wash it with water. When the hot water bottle is not in use and ready to be stored, remember to fill it with air or put some cool water in it, then hang it ups

A hot water bag is very meaningful for our healthy life. In addition to keeping the body warm, it can also relieve anxiety to treat various discomforts in the body. How can I buy a high-quality, satisfying hot water bag? This article will help you understand how to distinguish good and bad hot wat