Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Student t Distribution01:31

Student t Distribution

14.2K
The population standard deviation is rarely known in many day-to-day examples of statistics. When the sample sizes are large, it is easy to estimate the population standard deviation using a confidence interval, which provides results close enough to the original value. However, statisticians ran into problems when the sample size was small. A small sample size caused inaccuracies in the confidence interval.
The Student t distribution was developed by William S. Goset (1876–1937) of the...
14.2K
Microsoft Excel: Student's t-Test01:25

Microsoft Excel: Student's t-Test

1.7K
Student's t-test in Microsoft Excel is a statistical method used to compare the means of two groups to determine if they are significantly different from each other. It's commonly used to evaluate hypotheses, such as testing whether a treatment has an effect compared to a control group. Excel provides built-in functions to perform t-tests, making it accessible for users needing to conduct basic statistical analysis.
To conduct a t-test in Excel, use the T.TEST function or the "Data...
1.7K
Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

11.7K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
11.7K
Center of Gravity00:58

Center of Gravity

6.7K
The center of gravity (COG) of an object is the point where the object's total weight is considered to be concentrated. Knowing the location of the center of gravity is useful when predicting the behavior of a moving object or designing static structures. In a uniform gravitational field, the center of gravity is similar to the center of mass (COM); yet, these two points can be positioned differently. For example, the Moon's center of mass lies very close to its geometric center, but...
6.7K
Center of Gravity01:15

Center of Gravity

2.2K
The center of gravity is the point at which an object's weight appears to be concentrated and can be used to balance the object perfectly. This point is essential in mechanics as it provides information regarding a body's stability and moments of inertia. The center of gravity does not always have to fall within the shape or boundaries of the body; it may also lie outside the body in certain cases.
To determine its location, the principle of moments can be utilized by dividing the object into...
2.2K
Comparing Experimental Results: Student's t-Test01:09

Comparing Experimental Results: Student's t-Test

6.0K
The t-test is a statistical method used to compare the sample mean with a population mean or compare two means from two data sets. The test statistic is calculated from the standard deviation, mean, and number of measurements in the data set at a selected confidence interval and then compared to a table of critical values at this confidence level. If the test statistic is smaller than the critical value, the null hypothesis is accepted. In this case, we state that the difference between the...
6.0K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Genes Differentially Expressed in Growth Hormone Transgenic Salmon.

The Biological bulletin·2016
Same author

Continuing the search for dyslexia genes on 6p.

American journal of medical genetics. Part B, Neuropsychiatric genetics : the official publication of the International Society of Psychiatric Genetics·2003
See all related articles

Related Experiment Video

Updated: Feb 6, 2026

Use of Galvanic Skin Responses, Salivary Biomarkers, and Self-reports to Assess Undergraduate Student Performance During a Laboratory Exam Activity
07:32

Use of Galvanic Skin Responses, Salivary Biomarkers, and Self-reports to Assess Undergraduate Student Performance During a Laboratory Exam Activity

Published on: February 10, 2016

9.9K

Student-Centered Microbioassay Laboratory Activity Utilizing Bioluminescent Bacteria.

Kerri Younkin1, Christina Romano2

  • 1Southern York County School District, Glen Rock, PA 17327.

Journal of Microbiology & Biology Education
|August 14, 2018
PubMed
Summary

Students developed and tested water quality microbioassays using bioluminescent bacteria to detect pollutants. This hands-on activity enhanced their understanding of experimental design and scientific writing for real-world environmental problems.

More Related Videos

Physiological Experimentation with the Crayfish Hindgut: A Student Laboratory Exercise
10:07

Physiological Experimentation with the Crayfish Hindgut: A Student Laboratory Exercise

Published on: January 18, 2011

16.2K
Bioluminescent Optogenetics 2.0: Harnessing Bioluminescence to Activate Photosensory Proteins In Vitro and In Vivo
07:19

Bioluminescent Optogenetics 2.0: Harnessing Bioluminescence to Activate Photosensory Proteins In Vitro and In Vivo

Published on: August 4, 2021

5.3K

Related Experiment Videos

Last Updated: Feb 6, 2026

Use of Galvanic Skin Responses, Salivary Biomarkers, and Self-reports to Assess Undergraduate Student Performance During a Laboratory Exam Activity
07:32

Use of Galvanic Skin Responses, Salivary Biomarkers, and Self-reports to Assess Undergraduate Student Performance During a Laboratory Exam Activity

Published on: February 10, 2016

9.9K
Physiological Experimentation with the Crayfish Hindgut: A Student Laboratory Exercise
10:07

Physiological Experimentation with the Crayfish Hindgut: A Student Laboratory Exercise

Published on: January 18, 2011

16.2K
Bioluminescent Optogenetics 2.0: Harnessing Bioluminescence to Activate Photosensory Proteins In Vitro and In Vivo
07:19

Bioluminescent Optogenetics 2.0: Harnessing Bioluminescence to Activate Photosensory Proteins In Vitro and In Vivo

Published on: August 4, 2021

5.3K

Area of Science:

  • Environmental Science
  • Microbiology
  • Science Education

Background:

  • Water contamination poses significant human health and environmental risks.
  • Traditional chemical water quality testing can be time-consuming and costly.
  • Microbial assays offer an alternative for detecting aquatic pollutants.

Purpose of the Study:

  • To engage high school and undergraduate students in a hands-on laboratory activity focused on water quality assessment.
  • To enable students to design and conduct experiments using bioluminescent bacteria to detect common aquatic pollutants.
  • To enhance students' understanding of experimental design principles and scientific writing skills.

Main Methods:

  • Students worked in pairs to design laboratory protocols for a water quality microbioassay.
  • Bioluminescent bacterial species (Photobacterium phosphoreum or Aliivibrio fischeri) were exposed to common aquatic pollutants.
  • Students applied principles of experimental design, including controls and variables.
  • Students wrote scientific explanations for their findings and recommendations.

Main Results:

  • Student-designed investigations successfully tested the reaction of bioluminescent bacteria to aquatic pollutants.
  • Pre- and post-evaluation data indicated achievement of learning objectives related to experimental design and protocol writing.
  • Students demonstrated success in designing investigations and writing protocols with scaffolding.

Conclusions:

  • The laboratory activity effectively taught students about water quality testing and experimental design.
  • Bioluminescent bacteria show potential for use in student-developed microbioassays for pollutant detection.
  • This student-centered approach successfully improved students' scientific inquiry and writing skills.