For at least the past decade, an unusual decline of black walnut (Juglans nigra) has been observed in several western states. Initial symptoms involve a yellowing and thinning of the upper crown, which progresses to include death of progressively larger branches (Figure 1). During the final stages large areas of foliage may rapidly wilt. Trees often are killed within three years after initial s...

The correlation between the peroxidase activity, chlorophyll and soluble protein content as well as the changes in vascular bundle structure in Norway spruce (Picea abies L. Karst.) needles affected by cement dust were studied. In spite of the absence of any yellowing symptoms, a significantly lower chlorophyll con­ tent was measured in spruce needles affected by cement dust. Observed sieve cel...

Broccoli which is an important source of vitamins and anticarcinogenic property substances [23], presents a short shelf-life, especially at room temperature, due to immaturity of the texture in the moment of the harvest as well as to physiological factors regulated by genetic mechanisms [30]. Several changes are observed along its senescence and some are easily observed as the yellowing generat...

The quality of midsole products significantly impacts the quality, durability, and comfort users shoe manufactured by ABC company. high percentage average number product defects based on yield data for 12 months is 3.1% which exceeds required company 2%. There are six types in midsole: yellowing, porous, bubbles, broken, over left material trimming. Three from focus improvement Pareto concept, ...

The massive decline of Norway spruce ( Picea abies (L.) Karst) has been observed in the Krušné hory during the last few decades. Before macroscopic changes occur (e.g . needle yellowing and foliar lost), the effect of stress factors is initially recognisable as the metabolic and microscopic changes. Phenolics compounds , lignin and photosynthetic pigments seem to be good indicators of needle pr...