Essays on Ethylene

Assumptions in Molecular Weight Determination and their impact on MW determination

DSC measures the quantity of required heat necessary to melt a sample where the heat of fusion is calculated based on a percentage of crystallinity. Therefore, the methods used to measure crystallinity, weight determination such as DSC must be detailed to retrieve valuable results. However, in most of the molecular weight determination methods, there are certain assumptions undertaken but those assumptions also have a certain impact on results. In DSC profile, three types of distinct probabilities of uncertainty exist. The first is natural uncertainty that may be linked to equipment such as uncertainty of weight measurements of the sample. ...

Flat roofs are roofing systems with the slop less than 10 degrees. This construction allows to use them as living space. Flat roofs exist for centuries, and people developed different types of covering for these systems. There are several most popular decisions with own advantages and features. TPO. These are single-ply roof membranes made from thermoplastic olefin or ethylene propylene rubber. TPO membranes have “resistance to ozone, are algae-resistant, environmentally friendly and safe to install” (roofhelp.com, n. d.). The typical thickness of TPO sheets varies from 40 to 100 mils. Constructors use hot air to seal seams between sheets. ...

Introduction

Ethylene is a naturally occurring hydrocarbon gas, although it can also result in combustion of large chained hydrocarbons. Additionally, it is the simplest gaseous organic compound of the alkene group. Statistically, it is the most commercially manufactured gas globally since it has several industrial applications. The gas is odorless, and climacteric fruits do produces the gas as they begin to ripe, for instance, apples. During the fruit ripening process, the gas is responsible for color changing, softening of the fruit as well as the change in texture in addition to other processes too (Abeles et al., 2012 n.p).

Respiration versus ripening

Ripening ...

EXECUTIVE SUMMARY

Special designs have been made to suit various sports. This is important as it plays an important role in sports performance. Companies have resorted to good quality textile materials to design sportswear clothing. Sportsmen should wear comfortable costumes for them to perform well in their competition. When designing sportswear, the market has to be identified first. That is the design to be used, the materials required and footwear. The fabrics available should also be identified. The comfort of the wearer is also considered as this affects performance.

History of polymers

Polymers have been used for centuries to manufacture plastics. Due to advance ...

The following paper describes the current developments and advances in the use and application of smart packaging technology in food packaging processes. The paper focuses on the application of the technology through various methods of smart food packaging, process designs, equipment used and the current applications. The paper also gives the various applications for the smart food packaging technologies.

Oxygen Absorbers

Oxygen absorbers/scavengers refer to smart packaging technologies that work by absorbing oxygen from foods while reducing oxygen metabolism in the packaged food (Latou et al. 2010). The process is designed to decrease oxidative rancidity and stop any unintended oxidation of ...