Related Experiment Video
Updated: Feb 9, 2026
09:14
Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model
Published on: June 18, 2021
2.9K
Experimental Rhazya stricta toxicosis in rats
1Department of Veterinary Medicine, King Saud University, Buraidah, Al-Qassim, Kingdom of Saudi Arabia.
Veterinary and Human Toxicology
|February 9, 1999
Summary
Saudi Rhazya stricta shows toxicity in rats at high doses (10% and 50%), causing organ damage and death. However, a low dose (2%) promoted growth due to its rich nutritional content.
Area of Science:
- Pharmacology
- Toxicology
- Nutritional Science
Background:
- Rhazya stricta is a Saudi plant used in traditional medicine.
- Its safety and efficacy for medicinal purposes require scientific investigation.
Purpose of the Study:
- To evaluate the toxicological effects of Rhazya stricta leaves in a rat model.
- To determine the dose-dependent effects of Rhazya stricta on Wistar albino rats.
Main Methods:
- Male Wistar albino rats were fed diets containing 2%, 10%, or 50% Rhazya stricta for 6 weeks.
- Growth rate, physical symptoms, serum biochemistry, and histopathology were assessed.
Main Results:
- High doses (10% and 50%) led to decreased growth, hepatotoxicity, and hepatorenal lesions.
- The 50% dose was fatal, causing anemia, neutropenia, and altered serum levels of copper, zinc, protein, and urea.
- The 2% dose promoted growth, indicating beneficial nutritional value (28.3% crude protein, 16.6% crude fat).
Conclusions:
- Rhazya stricta exhibits dose-dependent toxicity in rats, with significant adverse effects at 10% and 50% dietary inclusion.
- Low-dose Rhazya stricta supplementation may be beneficial due to its nutritional profile, but high doses pose serious health risks.
Related Concept Videos
01:20Bioequivalence Experimental Study Designs: Completely Randomized and Randomized Block Designs
250
Body:Bioequivalence experimental study designs are crucial methodologies used in evaluating and comparing the bioavailability of different drug products. These designs are categorized into various types: completely randomized, randomized block, repeated measures, cross and carry-over, and Latin square designs.Completely randomized designs involve randomly allocating treatments to all subjects participating in the experiment. This allocation is achieved by assigning unique random numbers to...
250
02:37Experimental Determination of Chemical Formula
47.5K
The elemental makeup of a compound defines its chemical identity, and chemical formulas are the most concise way of representing this elemental makeup. When a compound’s formula is unknown, measuring the mass of its constituent elements is often the first step in determining the formula experimentally.
47.5K
02:15Experimental RNAi
7.6K
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
7.6K
01:16Experimental Designs
18.1K
An experimental design is a systematic process that allows researchers to evaluate the relationship between dependent and independent variables. There are three widely used types of experimental design - pre-experimental design, true experimental design, and quasi-experimental design. In pre-experimental design, the researcher compares the data before and after some interventions or treatments. The true-experimental design has more than one purposefully created group, a commonly measured...
18.1K
01:23Correlation of Experimental Data
491
Dimensional analysis simplifies complex physical problems and guides experimental investigations, but it does not provide complete solutions. It identifies the dimensionless groups that influence a phenomenon, but experimental data is needed to establish the specific relationships and validate theoretical predictions.
For example, a spherical particle moving through a viscous fluid experiences drag. Dimensional analysis shows that the drag force depends on the particle's diameter, velocity,...
For example, a spherical particle moving through a viscous fluid experiences drag. Dimensional analysis shows that the drag force depends on the particle's diameter, velocity,...
491
01:09Comparing Experimental Results: Student's t-Test
6.1K
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...
6.1K