Related Experiment Video
Updated: Feb 12, 2026

11:16
Progressive-ratio Responding for Palatable High-fat and High-sugar Food in Mice
Published on: May 3, 2012
22.8K
[Research Progress on Determination of Drowning Site]
1Department of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China.
Fa Yi Xue Za Zhi
|March 27, 2018
Summary
Determining the drowning site is crucial for victim identification. Analyzing inorganic particles and planktons in tissues helps pinpoint the location by matching them to suspicious water mediums.
Area of Science:
- Forensic Science
- Environmental Science
- Microbiology
Background:
- Bodies recovered from water present common forensic challenges.
- The location where a body is discovered often differs from the actual drowning site.
- Accurate determination of the drowning site is critical for victim identification.
Purpose of the Study:
- To summarize research on identifying drowning sites.
- To highlight the importance of environmental markers in forensic investigations.
- To provide a reference for forensic practitioners.
Main Methods:
- Analysis of inorganic particles (granular impurities) in victim tissues.
- Microscopic examination of planktons (diatoms, bacteria) in victim tissues.
- Comparison of particle and plankton profiles between victim tissues and potential drowning water bodies.
Main Results:
- Inorganic particles and planktons serve as valuable markers for drowning diagnosis.
- Similarity in the types and distribution of these markers indicates the drowning site.
- This comparative analysis offers practical application in forensic investigations.
Conclusions:
- The analysis of inorganic particles and planktons is a reliable method for determining drowning sites.
- Matching environmental markers aids in resolving discrepancies between discovery and drowning locations.
- This research provides a valuable forensic tool for victim identification.
Related Concept Videos
Tumor Progression
7.5K
Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
7.5K
mTOR Signaling and Cancer Progression
4.9K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
4.9K
Determining Order of Reaction
62.6K
Rate laws describe the relationship between the rate of a chemical reaction and the concentration of its reactants. In a rate law, the rate constant k and the reaction orders are determined experimentally by observing how the rate of reaction changes as the concentrations of the reactants are changed. A common experimental approach to the determination of rate laws is the method of initial rates. This method involves measuring reaction rates for multiple experimental trials carried out using...
62.6K
Determination
21.0K
During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In...
21.0K
Determining the pH of Salt Solutions
48.3K
The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations form a solution with a pH less than 7. For example, in ammonium nitrate (NH4NO3) solution, NO3− ions do not react with water whereas NH4+ ions produce the hydronium ions resulting in the acidic solution. In contrast, salts that contain pH-neutral cations and the hydroxide ion-producing anions form a solution with a pH greater than 7. For...
48.3K
Rate-Determining Steps
37.5K
Relating Reaction Mechanisms
In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...
In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...
37.5K

