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A boy holds two shuttlecocks of different colors in his palms for playing bambinton outdoors.

Close-up of a woman opening a tin can with jelly pate inside using her hands.

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A worker holds a portable multimeter and a triangular high-voltage warning sign over a paper production plan.

Mark the high-voltage area on the drawing with a warning sign. An electrical engineer takes measurements on the drawing using a pair of dividers.

A close-up, high-angle shot shows an electrician holding a caliper and a protractor with gloved hands over a paper floor plan of an apartment, upon which a high-voltage warning sign is placed.

An electrician holds a portable current meter over a paper blueprint of a house.

A high-voltage warning sign is being held against a paper drawing by an engineer using a protractor ruler.

A worker holds a portable voltmeter against the backdrop of a paper floor plan of an apartment; the voltmeter's socket is covered by a high-voltage warning sign.

Black powdered toner is spilled on white paper on a table after being replaced in a laser printer cartridge.

Toner powder spilled out of a broken laser printer cartridge.

Toner spilled onto the desk from a broken laser printer cartridge.

The scientist placed an immunological plate containing antibody reactions onto the laboratory protocol; additional plates lay on the table nearby.

A close-up shot shows a scientist holding a laboratory report with results and an immunological plate displaying an agglutination reaction.

A doctor holds two immunological plates showing agglutination reactions in front of themselves. They compare the reaction results on the different plates.

A scientist is analyzing an immunological test for the antibody response to a pathogen using a human blood sample. A test for the immunological response to a pathogen.

A scientist in a gloved hand holds an immunological plate showing an agglutination reaction, amidst boxes of test tubes on a laboratory bench.

Immunological plates for antibody reactions lie on the laboratory bench next to boxes of test tubes.

A technician is holding a laser printer cartridge with an exposed drum on which poor-quality toner has baked on.

The scientist records the results of the enzyme immunoassay from the immunological plate into the laboratory protocol.

A set of small plastic test tubes with yellow liquid in a cell box, one test tube is held by a scientist with the fingers of his hand in a row.

The scientist holds a box containing a set of small test tubes containing sample doses.

A collection of vaccine samples in small test tubes, placed in individual compartments in a box held by a scientist.

On the metal workbench in the microbiology cabinet are racks of test tubes. A collection of prepared bacterial strains in test tubes.

A set of test tubes with biological substances in a red rack held by a scientist against a background of petri dishes on a laboratory bench.

A set of plastic laboratory centrifuge tubes in a red rack in the foreground. Dishes containing bacterial colonies lie on the lab table.

A water supply system consisting of a pipe distribution system with bends and taps that supplies water to the heating boiler.

A scientist holds a small test tube with a clear liquid next to a red stand and experimental test tubes.

Clear plastic jar with green chemical salt, pure nickel chloride for chemical reactions.

A close-up of an immunological plate with wells filled with yellow liquid being analyzed in a laboratory, in the hands of a scientist.

A high voltage warning triangle lies on a working laptop keyboard.

A completed laboratory test report is in an individual folder on the doctor's desk, next to a stand with test tubes and a hole punch.

Bacteria form round colonies on the surface of agar in a Petri dish held by a scientist against a backdrop of stacks of plates containing bacterial cultures.

Bacterial growths on a nutrient medium in a petri dish held by a scientist on a white background.

A scientist holds a petri dish containing bacteria that are breaking down oil pollution from a test tube.

Three test tubes with samples of petroleum products are being used in a laboratory to study bacteria that decompose oil.

A petri dish containing dense colonies of Bacillus subtilis bacteria, held in a scientist's hand.

Red mushroom mycelium grows on agar medium in a petri dish. A scientist holds the dish against a white background.

Three test tubes containing samples of oil pollution from water bodies, collected at the sites of environmental accidents involving oil tankers.

Analysis of a colony of pink-colored bacteria in a petra dish in laboratory conditions under aseptic conditions, in the background are other Petri dishes.

Power supplies with a high-current warning sign on a table. Batteries with terminals before installation in uninterruptible power systems.

Large square 12 volt battery with high voltage warning triangle.

Typical bacillary colonies of Bacillus subtilis bacteria on a nutrient medium in a petri dish held by a scientist in his hand on a white background.

Close-up of a man holding his black credit card with his fingers against the background of a working laptop keyboard.

Growing bacterial colonies on a petri dish with agar medium, scientist's hand in a blue glove holding a petri dish on a white background.

The woman opened a tin can of pate with her hands to feed the cat.

A man holds a credit card and money in his hand against the background of a working laptop keyboard.

Portrait of a boy biting into a slice of yellow watermelon held in his hands.

A fair-haired boy looks expectantly at the tasty slice of yellow watermelon he holds in his hands in a park outside.

A close-up of a yellow watermelon slice held by a boy outdoors in a park. The boy is showing off the yellow watermelon.

Two cans of food stand on the kitchen table, and a woman opens one of the cans using a ring.

A set of colored plastic keys lies on a wooden table. These are used to analyze a person's psychological state.

Two different sized tin cans with tin rings for opening stand on a thick kitchen table.

The cleaner holds dust debris from the vacuum cleaner's vacuum bag in her hands.

Dust piles of garbage in the hands of a man, his hands protected by yellow gloves.

Emptying a vacuum cleaner bag filled with debris using gloved hands outdoors.

A man in yellow gloves removes trash from a vacuum cleaner's vacuum bag into a blue trash bag.

Emptying a vacuum cleaner's vacuum bag from overflowing household debris. A person wearing gloves removes collected debris from the vacuum cleaner bag.

The cleaner carefully removes debris and hair from the vacuum cleaner bag with her gloved hands and cleans the clogged reusable bag.

The cleaner removes hair and wool debris from the vacuum cleaner's vacuum bag and cleans the reusable bag.

A set of two rows of plasticine in individual bags on a marked work mat.

The cleaner shows dust mounds that cause allergies in people, holding them in her gloved hands.

A scientist fills out a laboratory paper research protocol; next to him lies a petri dish with bacteria and two ampoules with an experimental antibiotic.

A scientist holds a round petri dish containing bacterial and mold colonies with both gloved hands against a background of a laboratory protocol.

A boy holds a shuttlecock with his fingers and a racket with his other hand to play speed bambinton.

A boy holds a shuttlecock with a badminton racket with his fingers while standing outdoors in summer.

A boy holds a wooden toy airplane with a propeller on the front at arm's length while sitting outside in a park.

A boy plays with a wooden model of an airplane in a park, pointing at the airplane's propeller.

A boy wearing sunglasses on the street with a wooden airplane in his hands, playing at being an airplane pilot.

A boy plays airplane pilot with a wooden toy airplane, holding it in his hand against a blue sky background.

A boy holds a wooden airplane model by the tail and directs the plane towards the blue sky.

Wooden model of a toy airplane in a boy's hand against a blue sky background.

A fair-haired boy in sunglasses stands on a fence and holds a wooden airplane in his hand against the sky.

A happy boy climbed a high fence and held a wooden airplane in his hand against the blue sky.

A boy in glasses holds a children's wooden airplane in his hand against the background of the blue sky in the park.

Red currants in a laboratory Petri dish held by a scientist with gloved hands, with a rack of test tubes in the background.

On the laboratory workbench there are racks of test tubes and a petri dish with green gooseberries; a scientist takes out one test tube with liquid from the rack.

Qualitative color reaction for the presence of nitrates in water using a chemical test in two test tubes in the laboratory.

Two stands with a set of test tubes and vials for experiments on a workbench in a microbiology laboratory.

A scientist holds a small branch of red currant against a rack of test tubes on a laboratory bench.

A scientist holds a small test tube with a yellow vaccine in his fingers; on the table there are racks with test tubes and a set of drugs.

A scientist holds a Petri dish with gooseberries, with racks of test tubes in the background. Studying the quality of the berries in the laboratory.

Transgenic green gooseberry plant in a petri dish, research into the properties of green gooseberry.

A petri dish in a scientist's hand with two red colonies of bacteria resistant to human chemical pollution.

On the laboratory bench are three open petri dishes containing bacterial colonies and a rack containing small test tubes of liquid substances.

The pipes and hoses are connected to a metal cabinet. The piping runs between the wall and the steel block.

Cobalt chloride in a sealed plastic jar held by a scientist in a laboratory.

Agglutination reaction of red blood cells to substances secreted by bacteria, which is carried out in an immunological plate with 96 wells.

Petri dish with bacterial contamination inside, bacterial colonies have grown on agar.

A scientist holds a large petri dish containing identical colonies of bacteria with both gloved hands.

A close-up of a large petri dish containing differently shaped bacterial colonies held in a scientist's hand.

A large colony of bacteria has taken over most of the area of the Petri dish that the scientist is holding in his hand.

A scientist applies a substance to a biological specimen on a glass slide in a sterile microbiological cabinet behind glass using an automatic dispenser.

Bacterial colonies in a Petri dish on a white background; a scientist's hand is holding the Petri dish.

A scientist holds a Petri dish containing bacterial colonies with irregular edges.

A Petri dish with small, translucent bacterial colonies on nutrient agar.

Two wires are connected to the terminals of a large battery via clamps. The battery has a warning sign warning of dangerous voltage.

A credit card with a chip lies on the keyboard of a switched-on laptop.

Two different sized cans of food on the kitchen table, whole unopened cans.

A woman uses gloved hands to remove hair and dust debris from a vacuum cleaner bag while cleaning.

The boy holds a container with shuttlecocks for bambinton and takes out two shuttlecocks for the sport game from the container.

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