Crystallization

decision-making (Newman & Newman 405). Any college student may be at any phase. While you cannot skip phases, two college students may be a two completely different phases. The crystallization phase seems to be the starting point for this age. I would argue that the exploration phase begins in high school or sooner. During the crystallization phase the student weighs out the pros and cons of many different career choices and dip their toes in the water to get a feel for their major. After this…

1) What are engineering stress and strain? Answer: Engineering Stress: Engineering stress is also called nominal stress, and it is defined as the applied load divided by the original cross sectional area of the material. Engineering Strain: Engineering strain is defined as the amount of material that deforms per unit length in a tensile test. Engineering strain is also known as nominal strain. 2) In the figure below, graphically show the toughness of three class materials:…

It is believed that the first sugar cane was used by a man in Polynesia.9 In 510 BC the Emperor Darius (of what was then Persia) had invaded India where he had found, “a reed which gives honey without bees.”9. But of course it’s not 100% proven that this is true. Officially, Sucrose was discovered in India in 6 century AD by boiling cane juice.1 In 1747 Andreas Sigismund Marggra (A German scientists) was examining sugar beets when he discovered sucrose.1 Later in 1802, Franz Achard (who was a…

I am interested in the position of Forensic Lab Intern at Pierre’s DCI Forensic Lab. I am a senior student at the University of South Dakota pursuing a degree in Biology and Criminal Justice with the goal of becoming a forensic scientist. The classes that I take are to build my knowledge on lab procedure, biology, and the criminal justice field. Some of the classes I am currently enrolled in are Analytical Chemistry, Human Anatomy, and Human and Animal Osteology. These classes were selected…

Phyllanthus niruri Extracts of Phyllanthus niruri have been studied for biological activities in various animal models and in vitro models and reported to possess significant antimicrobial, antiviral, hepato protective, antioxidant, anticancer, anti-inflammatory, antiplasmodial, antiurolithiatic and diuretic. The phytochemical studies were characterized and the presence of various compounds such as lignans, phyllanthin, hypophyllanthin, flavonoids, glycosinoids & tannins was mentioned (Narendra…

Transcription in prokaryotes requires the formation of the holoenzyme RNA polymerase (holoRNAP), which consists of a core enzyme and a σ subunit. The core enzyme consists of 5 subunits: 2 copies of α, which assemble the enzyme and bind regulatory factors; one copy of β, which has polymerase activity of RNA chain initiation and elongation; one copy of β’, which binds nonspecifically to DNA; and omega. An active center where RNA synthesis occurs is located within the DNA binding channel formed by…

Ultrasound and meat quality The quality of meat is based on aroma, taste, appearance, texture and juiciness. Texture is the most important factor in determining the quality of meat as per consumer behavior. There are several factors that affect texture such as the tenderness of the meat, juiciness and the degree of maturation. Tenderness The quality of meat as a result of using Traditional tenderising methods is poor. This includes mechanical, enzymatic and chemical methods…

The title of this article, “Are Viruses Alive?” poses a very important question. There are very two important terms in the title, “virus” and “alive.” Viruses are parasites that replicate inside the cells of living hosts. The characteristics of life, which must all be met for an organism to be considered “alive” are as follow: cellular structure, ability to reproduce, ability to use energy, regulation of homeostasis, and organization. As stated earlier, the title of this article poses a very…

that involves salt, vinegar, and hydrogen peroxide. We put a penny in each cup and put the substances on the pennies to see what would happen. Vinegar made the penny almost spotless and salt and vinegar made the penny clean and also a slight crystallization. The hydrogen peroxide made the water green and crystallizes a little bit. From this experiment I learned that the vinegar chemically altered the penny’s appearance by cleaning it. The salt couldn’t clean the penny by itself because it…

was added to a test tube and mixed until dissolved. 2ml hexane was then added to the test tube, followed by 0.4ml cyclopentadiene. The test tube reacted for 5 minutes in a test tube rack and then 2 minutes in an ice-bath to allow for complete crystallization. The crystals were then put through the filtering apparatus to collect and dry all the crystals. About 3ml was used to rinse the crystals while in the apparatus. The crystals were then dried and the yield and melting point were taken.…