An ordinary spectrophotometer was used to study growth rates and increases in population size of nematodes by optical density measurements of nematodes suspended in 30-40% sucrose (w/v) solutions. The sucrose solution retarded the movement of nematodes in suspension and thereby decreased the fluctua
A nephelometer for measurement of nematode populations
β Scribed by J.E. Watson; C.B. Pinnock; E.L.R. Stokstad; W.F. Hieb
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 232 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0003-2697
No coin nor oath required. For personal study only.
β¦ Synopsis
A nephelometer
for measuring nematode populations is described in which a standard 18 mm culture tube is illuminated from below, and four selenium photocells are placed radially at 99" about the tube. This design minimizes fluctuations in readings due to movement of the nematodes at low population densities.
π SIMILAR VOLUMES
Energy intake is the most difficult component of energy balance to measure. All known methods are subject to considerable error, both random error and bias. High variability within and between subjects means that sampling is important to increase reliability. Further, the fact that true intakes are
## Abstract The authors describe a modelβbased kappa statistic for binary classifications which is interpretable in the same manner as Scott's pi and Cohen's kappa, yet does not suffer from the same flaws. They compare this statistic with the dataβdriven and populationβbased forms of Scott's pi in