a chemistry student ignites a bunsen burner and changes the color of the flame. - 本生燈 個影片檔及 b 捲影像00:18
a flame test used in chemistry to detect the presence of certain metal ions, based on each elements characteristic emission spectrum (potassium carbonate) - 本生燈 個影片檔及 b 捲影像00:13
a student lights a bunsen burner for an experiment while his teacher monitors. - 本生燈 個影片檔及 b 捲影像00:15
female doctor holding a heating pad with a bunsen burner for microbiological analysis while working in a medical clinic laboratory - 本生燈 個影片檔及 b 捲影像00:29
work of the kidneys - part 13 of 19. describes structure and function of the renal system, and explains how the kidneys maintain uniformity in blood and tissues. demonstrates, with animated drawings and laboratory experiments, the formation of urine, regu - 本生燈 個影片檔及 b 捲影像00:27
asian chinese human hands turn on kitchen gas stove preparing food for cooking - 本生燈 個影片檔及 b 捲影像00:24
flames from a bunsen burner continue to flicker after a nearby candle goes out. - 本生燈 個影片檔及 b 捲影像00:17
cu scientist sanitizing vials and test tubes with fire for chemistry experiment, boxmeer, netherlands - 本生燈 個影片檔及 b 捲影像00:20
medium shot researcher extracting milk from container and putting it in test tube in laboratory - 本生燈 個影片檔及 b 捲影像00:15
a high school teacher walks a student through experimenting with a bunsen burner. - 本生燈 個影片檔及 b 捲影像00:19
b/w 1952 close up man's hands lighting bunsen burner + attaching it to glass tubes in laboratory - 本生燈 個影片檔及 b 捲影像00:10
close up of doctor doing a micro organism culture of a urine sample in a petri dish - 本生燈 個影片檔及 b 捲影像00:21
unrecognizable doctor processing a micro organism culture of a urine sample in a petri dish at the hospitals lab - 本生燈 個影片檔及 b 捲影像00:21醫學樣本
science experiment: bunsen burner flame is adjusted, then a test tube containing sulphur is heated over it (sound available) - 本生燈 個影片檔及 b 捲影像00:07
a flame test used in chemistry to detect the presence of certain metal ions, based on each elements characteristic emission spectrum (potassium carbonate) - 本生燈 個影片檔及 b 捲影像00:11
a flame test used in chemistry to detect the presence of certain metal ions, based on each elements characteristic emission spectrum (calcium chloride) - 本生燈 個影片檔及 b 捲影像00:09
a flame test used in chemistry to detect the presence of certain metal ions, based on each elements characteristic emission spectrum (calcium chloride) - 本生燈 個影片檔及 b 捲影像00:10
1977 montage flame atop gas burner, vo synthetic fuel material / united states - 本生燈 個影片檔及 b 捲影像00:07
1926 montage man in laboratory working with burner and adjusting wick in kerosene lantern / united states - 本生燈 個影片檔及 b 捲影像00:22
sequence showing laboratory workers at crookes laboratory filling and sealing glass ampoules of drug medication. - 本生燈 個影片檔及 b 捲影像00:35