modern research laboratory workstation. female scientist working on a computer. researching viruses and diseases - 化學 個影片檔及 b 捲影像00:25
aerial view of cement factory tower with high concrete plant structure at industrial production area. manufacturing and global industry concept. 4k - 化學 個影片檔及 b 捲影像00:14
teams specialised in hazardous materials and poisonous disposal gather spilt dangerous materials. - 化學 個影片檔及 b 捲影像00:15
food scientist, nutritionist or quality control officer wear a hair net and sterile clothing. check the quality of beverage products in the production line - 化學 個影片檔及 b 捲影像00:34
scientists use pipette dropper samples to test tubes.to conduct scientific experiments 4k stock video - 化學 個影片檔及 b 捲影像00:05
science, girl and students or happy in class with test tube for chemical experiment and scientific knowledge. children, liquid container and smile at school for chemistry study, education or research - 化學 個影片檔及 b 捲影像00:06
firefighters' nighttime fire suppression training by simulating fire control in industrial plants with gas pipelines or oil pipelines, conducted by a teamwork. - 化學 個影片檔及 b 捲影像00:12爆炸
team of worker, clad in protective gear including a gas mask and hazmat suit, rushes a patient on a field bed away from the hazardous area surrounding a chemical spill from a factory. teamwork involved in the evacuation are palpable. - 化學 個影片檔及 b 捲影像00:14
graphics of revolving molecular structure with new chemical fusion against a purple background - 化學 個影片檔及 b 捲影像00:21
fingers place capsule on sample dish, break and remove contents using spatula, blue filter - 化學 個影片檔及 b 捲影像00:17
science, microscope and black woman in laboratory for medical analysis, research and study. healthcare, biotechnology and scientist with equipment for sample, experiment and vaccine development - 化學 個影片檔及 b 捲影像00:09
medical technicians are looking at the microscope.scientists in lab coats working in laboratory.scientist in biology tech laboratory inspecting liquid in beaker.laboratory analysis - 化學 個影片檔及 b 捲影像00:23
medical technicians are looking at the microscope.scientists in lab coats working in laboratory.scientist in biology tech laboratory inspecting liquid in beaker.laboratory analysis - 化學 個影片檔及 b 捲影像00:10
supervisor and employee at a chemical plant discussing something while looking at the inventory of chemical barrels produced - 化學 個影片檔及 b 捲影像00:15貨倉
team of workers at a chemical plant doing an inventory of barrels using a tablet computer - 化學 個影片檔及 b 捲影像00:18
male supervisor checking the operation of a chemical plant and taking notes on a clipboard - 化學 個影片檔及 b 捲影像00:08
scenes from organic synthesis experiments. extraction with a separating funnel. work-up. - 化學 個影片檔及 b 捲影像00:08
close up of various liquid solutions in test tubes being tested with ph test strip - 化學 個影片檔及 b 捲影像00:23
two inspection engineers working with laptop of oil factory and gas refinery plant industry at night for inspector safety quality control - 化學 個影片檔及 b 捲影像00:46
explaining matter: chemical change - part 8 of 18. illustrates that a chemical change takes place when atoms from the molecules of two or more materials join to form molecules of entirely different materials. examples of changes include burning, digestion - 化學 個影片檔及 b 捲影像00:31
close-up lab technician in microscope room research and development of antiviral drugs. - 化學 個影片檔及 b 捲影像00:11
asian male medical scientist researcher wearing a lab coat and protective equipment carefully examining, measuring, working with liquids and laptop as he searches for a potential covid-19 vaccine. - 化學 個影片檔及 b 捲影像00:43印度人
a flame test used in chemistry to detect the presence of certain metal ions, based on each elements characteristic emission spectrum (sodium nitrate) - 化學 個影片檔及 b 捲影像00:12
a flame test used in chemistry to detect the presence of certain metal ions, based on each elements characteristic emission spectrum (sodium nitrate) - 化學 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 (barium carbonate) - 化學 個影片檔及 b 捲影像00:14
a flame test used in chemistry to detect the presence of certain metal ions, based on each elements characteristic emission spectrum (calcium chloride) - 化學 個影片檔及 b 捲影像00:13
a flame test used in chemistry to detect the presence of certain metal ions, based on each elements characteristic emission spectrum (calcium chloride) - 化學 個影片檔及 b 捲影像00:16
a flame test used in chemistry to detect the presence of certain metal ions, based on each elements characteristic emission spectrum (copper sulfate) - 化學 個影片檔及 b 捲影像00:09
close up and slow motion of overhead view of pouring clear menthol colored oil into a pool of water and filling up the frame with floating oil drops against a back lit green and blue gradation background - 化學 個影片檔及 b 捲影像00:58綠色
close up and slow motion of overhead view of pouring multi candy colored oil into a pool of water and filling up the frame with floating oil drops against a back lit background - 化學 個影片檔及 b 捲影像01:00
close up and super slow motion of liquid oil drops from a lab pipette on white background. - 化學 個影片檔及 b 捲影像00:13水滴
students in chemistry classroom and students in biology classroom at secondary school / newcastle upon tyne, england, united kingdom - 化學 個影片檔及 b 捲影像00:23
girl pouring clear blue solution into test tube in science class / holding test tube up / pouring solution back into beaker / gorham, maine - 化學 個影片檔及 b 捲影像00:47