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DW discusses ways that we characterize particles and then presents one of his research projects that explored the particle shape differences that result from the use of different processing solvents. Background These are videos of Dr. Williams’ CHEM 4380 Forensic Chemistry Lectures at Sam Houston State University. They are provided for your benefit for studying if you are a student or for your ...

DW discusses the polymerization process and the trace elements that may be present for the various growth mechanisms. Background These are videos of Dr. Williams’ CHEM 4380 Forensic Chemistry Lectures at Sam Houston State University. They are provided for your benefit for studying if you are a student or for your curiosity if you are not a student. Dr. Williams’ campus page is: www.shsu.edu/chm...

DW discusses the chemical versatility of the carbohydrate polymers and the physical properties of biopolymers. Background These are videos of Dr. Williams’ CHEM 4380 Forensic Chemistry Lectures at Sam Houston State University. They are provided for your benefit for studying if you are a student or for your curiosity if you are not a student. Dr. Williams’ campus page is: www.shsu.edu/chm_dlw/ H...

DW gives a very basic primer on ammo and guns and discusses the analysis of GSR. Background These are videos of Dr. Williams’ CHEM 4380 Forensic Chemistry Lectures at Sam Houston State University. They are provided for your benefit for studying if you are a student or for your curiosity if you are not a student. Dr. Williams’ campus page is: www.shsu.edu/chm_dlw/ His science blog is: pchem4all....

Background These are videos of Dr. Williams’ CHEM 4380 Forensic Chemistry Lectures at Sam Houston State University. They are provided for your benefit for studying if you are a student or for your curiosity if you are not a student. Dr. Williams’ campus page is: www.shsu.edu/chm_dlw/ His science blog is: pchem4all.com/ His LinkedIn profile is: www.linkedin.com/in/darren-l-williams-pchemist/

Background These are videos of Dr. Williams’ CHEM 4380 Forensic Chemistry Lectures at Sam Houston State University. They are provided for your benefit for studying if you are a student or for your curiosity if you are not a student. Dr. Williams’ campus page is: www.shsu.edu/chm_dlw/ His science blog is: pchem4all.com/ His LinkedIn profile is: www.linkedin.com/in/darren-l-williams-pchemist/

Background These are videos of Dr. Williams’ CHEM 4380 Forensic Chemistry Lectures at Sam Houston State University. They are provided for your benefit for studying if you are a student or for your curiosity if you are not a student. Dr. Williams’ campus page is: www.shsu.edu/chm_dlw/ His science blog is: pchem4all.com/ His LinkedIn profile is: www.linkedin.com/in/darren-l-williams-pchemist/

DW discusses the various ways to classify controlled substances and the fact that the "toxin is the dose". Pharmacokinetics is also discussed with ADME. Background These are videos of Dr. Williams’ CHEM 4380 Forensic Chemistry Lectures at Sam Houston State University. They are provided for your benefit for studying if you are a student or for your curiosity if you are not a student. Dr. William...

DW discusses the chemistry of color changes in the context of presumptive colorimetric drug screening tests. Background These are videos of Dr. Williams’ CHEM 4380 Forensic Chemistry Lectures at Sam Houston State University. They are provided for your benefit for studying if you are a student or for your curiosity if you are not a student. Dr. Williams’ campus page is: www.shsu.edu/chm_dlw/ His...

DW discusses the use of microscopy, spectrophotometry, electron microscopy, and X-ray photometry for forensic analysis. Background These are videos of Dr. Williams’ CHEM 4380 Forensic Chemistry Lectures at Sam Houston State University. They are provided for your benefit for studying if you are a student or for your curiosity if you are not a student. Dr. Williams’ campus page is: www.shsu.edu/c...

DW walks through various ways to separate analytes using gas-liquid, liquid-liquid, and mobile-stationary partitions. Background These are videos of Dr. Williams’ CHEM 4380 Forensic Chemistry Lectures at Sam Houston State University. They are provided for your benefit for studying if you are a student or for your curiosity if you are not a student. Dr. Williams’ campus page is: www.shsu.edu/chm...

DW reviews the ICE table equilibrium calculations and relates them to the solubility of drugs and pharmaceutical substances in the blood stream. And he prepares you for the speciation calculations needed for effective liquid-liquid extraction schemes. Background These are videos of Dr. Williams’ CHEM 4380 Forensic Chemistry Lectures at Sam Houston State University. They are provided for your be...

DW discusses various statistical methods that are useful for exploring patterns in the data. Scatter plots, box plots by group, correlation matrix plots, correlation coefficients, cluster analysis, dendograms, and principal component analyses are all discussed. Background These are videos of Dr. Williams’ CHEM 4380 Forensic Chemistry Lectures at Sam Houston State University. They are provided f...

DW describes the practice of Statistical Process Control and Control Charting. He walks through some of the definitions and discussion in the ASTM standard E2587-16, and warns against two common mistakes. 1) "Fiddling" with the knobs of a process too much, which introduces avoidable variations from YOU the operator, and 2) tightening the control limits to the point where you have a constant and...

4380 L6 Describing Data Distributions with Skewness, Kurtosis, Histograms and Box Plots 2024

4380 L5 Calibration Quantitation and the Moral Imperative to use Statistically-Defensible Methods

4380 L4 Hypothesis Testing and the Q- z- t- and f-Statistical Tests 2024

4380 L2 Basic Statistics and a Measurement Exercise 2024

4380 L3 Propagation of Uncertainty in a Calibration Curve Analysis 2024

4380 L3 Propagation of Uncertainty in Serial Dilutions and pH Measurements 2024

4380 L1 Syllabus Walkthrough & a Basic Introduction to Forensic Chemistry 2024

Physical Evidence Exam 3 Review and Kahoots 4380 2023 Lectures

Alternate Light Sources and Fluorescent Evidence Detection 4380 2023 Lectures

Quantified Color XYZ and RGB 4380 2023 Lectures

Evidence of Arson and Analysis Techniques 4380 2023 Lectures

Gunshot Residue Analysis 4380 2023 Lectures

Exam 2 Review on Forensic Chemical Evidence 4380 2023 Lectures

Gas-phase Detection of Explosives and Toxic Chemicals for Forensic Security Operations 4380 2023 Lec

Short on Vapor Density Calculations 4380 2023 Lectures