According toHistory.com, the Cullinan was later cut into nine large stones and about 100 smaller ones, valued at millions of dollars. “The largest stone is called the “Star of Africa I,” or “Cullinan I,” and at 530 carats, it is the largest-cut fine-quality colorless diamond in t...
The key is adequate rinsing prior after rework, which is where most people fail. Eric Camden gave a good suggestion for determining localized ionic contamination by IC. You can also do FTIR looking for undesirable residual organics. Most companies don't have an FTIR, but you local university ...
Learn more about what FTIR is and how it can be used across an array of industries. This informative page describes the pros and cons of FTIR testing, as well as Innovatech Labs’ FTIR services, including the FTIR analysis process, requirements for a sample, testing capabilities and more. F...
If the extract is kept longer than 24 hours, then it is important to consider the homogeneity and stability of the extract. Before analysis, concentration of the extract should be done to maximize method sensitivity. This concentration step should be carefully considered because analyte loss can ...
preparative GC, especially for fragrance applications, is automation. Not so long ago the collection of the fractions was done manually, but this approach is time consuming. The GC-Fractionator, where you dissolve the peak as well by condensing the vol...
What are the advantages of an FTIR spectrometer compared with a dispersive instrument? 1. Describe and explain the possible effect on your TLC results of the following experimental errors or variations: (a) The analyte spots are two large...
the preprocessing done is normalization of the input data for the models. We performed normalization of the model inputs (X) using theStandardScaleralgorithm, in the scikit-learn library46, which calibrates the mean and scales to unit variance. The inputs of the tree-based algorithms, however,...
For various reasons, this is easier said than done. It is worth noting that the precautions here are equally true for any test (FTIR, gas chromatography, etc.) used to measure low boiling point contaminants such as fuel. Many fuels, for instance, will evaporate from the oil over time if...
Heterodimeric capping protein (CP/CapZ) is an essential factor for the assembly of branched actin networks, which push against cellular membranes to drive a large variety of cellular processes. Aside from terminating filament growth, CP potentiates the n
In theory, X-ray photoelectron spectroscopy (XPS) is based on a very basic process. Photons of specific energy are absorbed by electrons within a sample, which then emerge from the solid. The electronic states of atoms in the surface region can...