Essays on Pores

Overview

Polyvinylidene fluoride is one of the polymers that are used as membrane material. This is because of its outstanding properties. Besides its comparatively high amount of fluorine, the polymer also has a high level of crystallinity. The result of these properties are exhibited in the performance of the Polyvinylidene fluoride polymer. For instance, the chemical stability of Polyvinylidene fluoride in chlorinated solvents and environments that are highly caustic and acidic is very high. Another property of the polymer is its hydrophobicity. This means that it is not compatible with water. This would create challenges if the polymer were to ...

1. Agiosperm wood has vessels as compared to conifers wood. Vessels can be defined as cells stacked end to end. Water is able to flow freely among them and otherwise vessels are called pores. However, conifers wood has resin canals that should not be confused with pores though they might look a little similar. Conifers wood is sometimes referred to as gymnosperms. 2. A. It is a part of sapwood. B. It is monocot. C. Monocots have inside their seed coats one seed leaf while dicots have two. Monocots’ leaves are thin due to the fact that the endosperm ...

Abstract

This examination paper acknowledges the spectacular diversity of reproductive adaptations for survival of various categories of land plants. It describes a typical life cycle of a land plant that reproduces via spores. It also identifies the different parts of Plant organs and their functions such as cell organelles, parts of a land plant, and epidermal cells. A microscope is an important tool for examination of biological specimens, including cell’s internal structures called organelle and is important in magnifying the focused area. Plants are classified into four main groups, namely, ferns, mosses, flowering and confers. This paper finds that ...

Abstract

In this experiment, benzene was treated with hydrogen in the presence of Pt/SiO2 as an example that can be applied on industrial operations to show that the most recently modernized methods of neutron total scattering that cover a wide Q-range allow the use of appropriate catalytic chemistry that can be measured on time domain to probe directly on site the hydrogenation of benzene within the catalyst pore. Based on this method, it is possible to study the rates of reaction on length scales that can provide measurements equivalent to the size of an atom or a nanometre. Furthermore, the ...

“The land ethic,” which is found in the work of Aldo Leopold, A Sand County Almanac, is a theoretical philosophical framework. In it, Leopold tries to confront the weaknesses which he say encompass common environmental conservation. Leopold, a trained forester, and hunter, cherished and recognized the benefits of nature (Leopold, 2014). Having lived through the Dust Bowl and the Great Depression, he witnessed fertile top soil in southwestern Wisconsin blown away by the wind and eventually sip into the sea. These he observed were as a result of human activities and wondered how, despite the profit motives of man ...

Cabbage white butterfly is also known as Pieris rapae. These species are flower visitors. They use tubular proboscis to acquire liquids. It consists of “two medially concave, elongated maxillary galeae joined dorsally and ventrally by cuticular projections, termed “legulae,” forming a food canal” (Lehnert et al. 167). Each legula has upper and lower branches. The organ is twisted into a spiral in a quiescent state. Butterfly’s head has a special pump that creates a pressure to move liquid through the food canal to the gut. P. rapae’s average forewing length is about 49.6 mm, while its proboscis’ ...

Paramecium is a unicellular organism belonging to genus, Protozoa. Like many other Protozoa, paramecium has ciliated body that aids in locomotion. The habitants of protozoa vary from fresh water bodies, marine water, brackish and stagnant waters in in basins and ponds, (Ladenburger 7). Some species of paramecium can easily be cultivated and induced to conjugate. Due to these characteristics, paramecium has been used in laboratories for research purposes. The body of a paramecium is covered by cytoplasmic structures which are called cilia. Cilia are hair like structures which helps the organism in movement. The flickering movement of cilia propels ...