An heatmap example for comparing plant floral volatiles; using R

Heatmap is among the most popular ways of visualization for multivariant data analysis people use in their presentation and researches. In studies of metabolomics related to plants or insects, heatmap can be straightforward in comparing metabolites among treatments in both quantitative and qualitative manners. Here one example is shown about how to illustrate the chemical…

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Tomato breeding for terpene production in leaves

Thanks to domestication, and due to that small wild tomato fruits has been transformed to the desired juicy fruits we see nowaday. Unfortunately one can’t make an omelette without breaking eggs. Tomato cultivars have yummy fruits, while they are vulnerable to a broad categories of pests, possibly due to the lost of important pest resistant…

GC-MS issue: GC initialization failure and system insensitivity

GC: Trace 1310 MS: TSQ 8000 Issue: Trace 1310 failed to get initiated after turing on the GC system. Solution: The PS (power supply) switching module built in GC was replaced, since its burning signs and smells on connections. Also the EI source from MS was cleaned to increase its sensitivity; pump oil was also…

Two potential issues encounted by working with summarize() after group_by() in dplyr

In both cases, summarize() does not display expected results no matter how you group_by(). (1) Loading both ‘dplyr’ and ‘plyr’. (2) Changing the data layout after group_by(). The data below is from an insect feeding experiment divided into six groups in which insects were introduced on feeding diets containing different chemicals that were extracted by…

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