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Which are examples of how technology has advanced scientific understanding?

Science and technology help each other advance. Scientific knowledge is used to create new technologies. New technologies often allow scientists to explore nature in different ways and make new discoveries. Examples of technologies that have helped science advance include the telescope and microscope.

Which best describes the relationship between science and technology?

Answer: Science and technology are related to each other in terms of new inventions or we can say technology leads to science or vice versa. Technology can be defined as the application of science and both are dependent to each other for their own growth.

What statement best describes doing science?

The correct answer is C). Science is a collection of knowledge about the natural world, but it is also the process of discovering how the natural world works.

Which function of the air sampler confirms that it is an electronic tool?

Rick uses an electronic air sampler to determine the amount of dangerous chemicals in the air. Which function of the air sampler confirms that it is an electronic tool? It records real-time sampling data. It requires a lot of space for data storage.

What are air samples?

Air sampling is a process used to determine what airborne contaminants are present in an environment. It uses special instruments to detect contaminants such as gases, vapors, dusts and fibers in the air. The significance of air sampling is that these substances can cause respiratory impairments if inhaled.

What are the different types of air sampling?

An introduction to the different types of air sampling techniques

  • Grab Sampling. Grab sampling is where a sample of air is taken at a specific time and analysed.
  • Passive or Active Sampling. Grab sampling though is very labour-intensive and large numbers of samples may be necessary to accurately characterize a site.
  • Edinburgh Sensors.

What is the purpose of an area air sample?

Air sampling is carried out to ensure that workplace or environmental air is meeting regulatory standards and to help Occupational Hygiene and Health & Safety professionals assess employee exposure to airborne hazards.

What is ambient air sampling?

The objective of ambient air sampling is determining the quality of ambient air as it relates to the presence and concentration of substances regarded as pollutants. A glass fiber filter is held in the filter holder, and a high flow rate of ambient air is drawn through it over a measured period of time.

How do you test for microbes in the air?

There are two primary methods for microbial air sampling: Active and Passive monitoring. In active monitoring, a microbial air sampler is used to force air into, or onto its collection medium (e.g., Petri Dish with nutrient agar based test media) over a specified period of time.

Which device is used for the enumeration of bacteria in air?

Capillary impinger : devices of simpler design , used in analysis of several samples of air at the same time.

How can we prevent microbes from spreading?

Keep your germs to yourself:

  1. Cover your nose and mouth with a tissue when sneezing, coughing or blowing your nose.
  2. Discard used tissues in the trash as soon as you can.
  3. Always wash your hands after sneezing, blowing your nose, or coughing, or after touching used tissues or handkerchiefs.

How would the presence of microbes in the environment be determined?

Antibodies raised against strains of microorganisms may also be used to determine direct counts for a specific subpopulation. It is also possible to detect microorganisms in the environment by means of antibodies using the enzyme-linked immunosorbent assay (ELISA) (Morgan et al.. 1989).

How do microbes affect living things?

The most significant effect of the microorganisms on earth is their ability to recycle the primary elements that make up all living systems, especially carbon (C), oxygen (O) and nitrogen (N). These elements occur in different molecular forms that must be shared among all types of life.

How do you detect microbes?

Common test formats for microbial food testing are ELISA assays, real-time PCR tests, nutrient plates and agar plates. For detection of pathogenic bacteria, immunological based methods (ELISA) are available.

How do you detect bacteria?

Conventional methods used to detect and quantify bacteria are plate culturing, polymerase chain reaction (PCR), enzyme linked immunosorbent assay (ELISA) and chemical sensors based detection strategies. Plate culturing is the “Gold Standard” for bacteria detection.

What are two methods of identifying bacteria?

Among the techniques we use are:

  • DNA sequencing – to identify bacteria, moulds and yeasts.
  • Riboprinter analysis – for bacterial identification and characterisation.
  • Repeat–based polymerase chain reaction – for assessing the similarity of microorganisms.
  • Rapid pathogen confirmation by polymerase chain reaction.

How do we identify pathogens?

Biochemical testing. The majority of clinical microbiology laboratories still rely on culture for the detection of most bacterial pathogens from clinical samples. Traditionally, culture is performed using general purpose agar-based media (e.g. blood agar) that will support the growth of a wide range of pathogens.

What are pathogens and how do we identify them?

pathogen: Any organism or substance, especially a microorganism, capable of causing disease, such as bacteria, viruses, protozoa, or fungi. Microorganisms are not considered to be pathogenic until they have reached a population size that is large enough to cause disease.

What is the meaning of pathogens?

A pathogen is usually defined as a microorganism that causes, or can cause, disease. We have defined a pathogen as a microbe that can cause damage in a host.

How is PCR used to identify a pathogen?

In PCR, a nucleic acid target (DNA) is extracted from the cell and denatured into single stranded nucleic acid. This type of PCR can be used for the identification of specific groups of pathogenic bacteria.

Which disease is detected by PCR?

Acute febrile illness like falciparum malaria, salmonellosis, babesiosis, have been identified using PCR. Especially with falciparum infections use of a single PCR reaction and hybridisation assays with various probes is used in species identification [15].

What is PCR used for?

What is PCR? Sometimes called “molecular photocopying,” the polymerase chain reaction (PCR) is a fast and inexpensive technique used to “amplify” – copy – small segments of DNA.

What are the 4 steps of PCR?

The following is a typical PCR thermocycler profile:

  • Initialization.
  • Denaturation (repeated 15-40 times)
  • Annealing (repeated 15-40 times)
  • Elongation or Extension (repeated 15-40 times)
  • Step 2-4 are then repeated 15-40 times.
  • Final elongation.
  • Final hold.

What are the 3 main steps of PCR?

PCR is based on three simple steps required for any DNA synthesis reaction: (1) denaturation of the template into single strands; (2) annealing of primers to each original strand for new strand synthesis; and (3) extension of the new DNA strands from the primers.

What is the principle of PCR?

Polymerase chain reaction (PCR) is a technology used for quick and easy amplifying DNA sequences, which is based on the principle of enzymatic replication of the nucleic acids. This method has in the field of molecular biology an irreplaceable role and constitutes one of the basic methods for DNA analysis.

Which is the first step in PCR?


What is needed for PCR?

The various components required for PCR include a DNA sample, DNA primers, free nucleotides called ddNTPs, and DNA polymerase. The various components required for PCR include a DNA sample, DNA primers, free nucleotides called ddNTPs, and DNA polymerase.

What happens during annealing in PCR?

Annealing – when the temperature is lowered to enable the DNA primers to attach to the template DNA. Extending – when the temperature is raised and the new strand of DNA is made by the Taq polymerase enzyme.

What do primers do in PCR?

A primer is a short, single-stranded DNA sequence used in the polymerase chain reaction (PCR) technique. In the PCR method, a pair of primers is used to hybridize with the sample DNA and define the region of the DNA that will be amplified.