Essays on Cation

Abstract

Application of the nanofiltration (NF) and ultrafiltration (UF) processes is applied in the handling of water that is produced raw. The application has been investigated in the current day through various studies (Wang 14). The experiment of the processes of both nanofiltration and ultrafiltration is conducted in the laboratory unit which is operated in a pattern of cross flow (Ashaghi, Ebrahimi, & Czermak, 46). The study that was conducted in Oilfield of North Sea using the process of membranes of ultrafiltration (UF) and microfiltration (MF) indicated that the content of hydrocarbon decreased from 50 mg/l to 2 mg/l which recorded ...

Explain Hardness of Water

Explain Hardness of Water The water that occurs in nature always contains salts, which exist in water as positive and negative ions. The salinity of fresh water is 1000 mg/L (1L of water contains 1000 mg of various salts or ions). The typical cations present in natural water are sodium, potassium, calcium and magnesium; the most common anions are chloride, sulfate, bicarbonate, nitrates, etc. Hardness of water refers to presence of calcium and magnesium ions. When water is heated, the reaction (Tebbutt, 1999):

takes place. Calcium carbonate, unlikely other salts, is insoluble and forms precipitate. The precipitate is ...

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Introduction

Polymerase Chain Reaction (PCR) is a very influential technique that helps in amplifying the specific segments of DNA. This biochemical procedure is performed in-vitro that is quite different from cloning. This technique is a fusion of synthesis protocol of distinct repeated segments of DNA and thermostable DNA polymerase application that has given scientists a very potent analytical, immunological and molecular technique used prevalently in clinical laboratory science (Garibyan & Avashia, 2013). PCR is based on three primary steps that include denaturation of the template into single strands, annealing ...

The periodic table of elements, by far, stands among the most notable discoveries in the history of chemistry. Nowadays, probably everyone who has ever heard about chemistry heard about the periodic table of elements. Its implications on the scientific world are so enormous that it has even leaked out to the general public and have become associated with the chemistry itself. This is not surprising considering the scientific strength of this instrument. Using the periodic table, many characteristic properties of the elements can be predicted and many phenomena can be explained. This discovery put so much scientific knowledge together, ...

Bae, Eun Sok. "Development of Application for Korean Food and Its Recipes in Popular Korean TV Dramas." Advanced Science and Technology Papers (2014): 1-5. Web. 28 Mar. 2016.< http://onlinepresent.org/proceedings/vol52_2014/29.pdf> The source provides information regarding the development of certain traditional Korean recipe that conforms to the cultural values of the Korean people. Over the recent years, the taste towards the traditional delicacies has increased tremendously, and many people continue to seek for the traditional flavors that incorporate some of the greatest Korean recipes. The source is an online journal that is found in the electronic databases. The search for ...

Abstract

Adsorption differs from absorption and activated clays are one of the most effective adsorbents in nature. The adsorbing action of activated clay is a selective adsorption process. Due to its effectiveness, activated clay has wide applications such as cleaning up oil spills and adsorbing dyes. Zeolite made up of silicon, aluminum and oxygen is also an adsorber, and it can be synthesized. Synthesis simply increases its pore or cavity sizes and makes it hydrophobic. Zeolites are selective adsorbers because of their unique pore sizes. Zeolites are used in removing heavy metals such as zinc, iron, copper, chromium and so ...

Definition of Some Terms

- Resting membrane potential: term denoting that Em is about -70mV - Depolarization: reversal of Em due to influx of sodium ions - Sodium (Na+): major extracellular cation - Threshold: minimal stimulus needed to cause an AP - Absolute refractory period: cell membrane insensitive to stimuli. - Potassium (K+): major intracellular cation

Answers to Questions

Describe a synapse, and include definitions of the pre- and post- synaptic neurons. A synapse is an anatomically specialized junction between two neurons, and it is where one neuron alters the activity of another. A presynaptic neuron conducts signals toward a ...

Some people choose to act violently as a way of releasing feelings of frustration, desperation or anger. As such, they undermine the use of nonviolent means of dealing with their negative feelings. Violent tendencies in the United States is a profound issue among the young people. However, there is no general explanation for the increase in youth violence over the years. Several things may be responsible for violent behavior among the American youth including peer pressure, low self-esteem, low educational achievement, witnessing domestic violence, being victims of early childhood abuse among other factors that may trigger negative emotions. Youth violence has ...

Chapter 3 Atoms and the Periodic Table

For centuries, many have tried to learn about the smallest particle. As far as 2500 years ago, Democritus and Leucippus created an idea for the atom and called it ‘atmos’ meaning indivisible. Various philosophers and scientists have proposed models for what and how the atom should be. The initial theory proposed by Dalton in 1803 states that atoms are indivisible and that all atoms of a particular material are identical. He also stated that atoms of different materials join to form compounds. J.J. Thompson proposed the initial model of the atom. It is called the plum pudding model. He theorized ...

Introduction

In the recent past, studies in the field of cognitive science have brought forth overwhelming evidence on the relationship between moral judgment and emotions. However, research on this topic a couple of decades old. For instance,StanleyMilgram, a social psychologist, carried a research on this topic in the 1970 where he instructed his students to approach strangers in New York subway and request for a sit. The research did not receive the kind of reception Milgram expected, he noticed that most of the students declined to participate. However, one student who offered to do the research aborted it prematurely. Left with no alternatives, ...

Article summary: Does servant leadership foster creativity and innovation? A multi-level mediation study of identification and prototypicality

The main goal of the multi-level study conducted by Yoshida D.T. et al. (2013) was to assess how servant leadership influences employee creativity and team innovation simultaneously. Businesses often gain their competitive advantage through employees that come up with creative, innovative ideas and work as a team to implement them. However, although these factors are highly interdependent, prior researches only focused on either creativity or innovation. No fundamental attempts were made to study how certain leadership behaviors simultaneously affect these two aspects on different levels. Former researches examined how transformational leadership or leader-member relationship influenced employee creativity. As it was ...

Positron Emission Tomography (PET) is a method of medical imaging that works by detecting gamma rays produced by the interaction of electrons with positrons after a tracer radionuclide is injected into the body. The tracer radionucleotide used is dependent on the part of the body that is being investigated, in some cases it is modified glucose, in others, it is a receptor ligand. Common uses of PET scans are cardiac studies that measure the oxygenation of the tissues of the heart and the function of the heart muscle, to detect skeletal trauma and bone cancers, kidney imaging to study the renal function ...

Abstract

The paper articulates the electrolyte and fluid study by describing functions and location of various body fluids and factors that affects variations in fluid compartments. These body fluids involves Body fluids involve blood plasma, mucus and lymphatic fluid, saliva and gastric juice, and other fluids such as tears, sweat, semen and vaginal secretions. The functions, regulation, sources and losses of the main electrolytes in the body are also described. The paper also outlines the basic principles of some of the processes that occur in human body such as osmosis, filtration, active transport and diffusion. In order to understand ...

Question 1

Soil is divided into three major soil phases. The three soil phases are; complex, association and undifferentiated groups. Each soil phases has unique chemical and physical properties that learners and surveyors use to distinguish one soil phase from the other. The common physical properties that are used to distinguish the three soil phases are: depth, clay, moist bulk density, available water capacity and organic matter content. On the other had the chemical properties that are used to distinguish the soil phases are cation exchange capacity and pH. The table below shows the chemical and physical properties of the three ...

Malaria is a tropical disease that has claimed many lives over the numerous centuries gone by (reference). It usually caused by the genus Plasmodium. The vector for this parasite is a female Anopheles mosquito which transmits the pathogen through bite (reference). One of the major challenges in disease vectors is insecticide resistance. Vector-borne diseases are usually a burden in developing countries because it is not easy to reduce/control disease. In many parts of Africa, Anopheles gambiae has developed resistance towards pyrethroid insecticides which is used to control the malaria vector (Kumar, Dudley, 2007). It is feared that there are high chances of ...

Abstract

This experiment sort to find an accurate and most viable method that would be used in laboratories to the measurement of iron concentration in aqueous samples. The methodologies that were identified for further analysis included; colorimetric assay (molecular spectroscopy), flame atomic absorption spectroscopy, redox titration (volumetric) and cation exchange chromatography (EMA technique). These methods were analyzed of their advantages and later subjected to a validation test. In the process, a wide range of CRMs were used alongside six other samples that contained unknown iron concentration.

The experiment was thus, geared towards providing answers to statements like; the necessity of quantification of ...

The movement from sites of waste-disposal of contaminated groundwater is a problem faced by many cities in world. Solid and liquid waste dumped in landfills generates an atmosphere where inorganic and organic compounds present in the water or which are produced in the landfill become prone of entering the hydrological regime through movement. The movement of contaminants in water bodies through landfills is more distinct in temperate and humid climates as penetration of rainfall is moderate to high, and separation of leachate from the aquifers which are underlying for extended time periods becomes a complex process. In such areas, landfills gets ...