PHYSICO-CHEMICAL, MORPHOLOGICAL AND TOPOGRAPHICAL CHARACTERIZATION OF MATERIALS INTRODUCTION: Biological evaluation and identification of the medical device is done by checking the three properties, they are Physicochemical, morphological and topographical . The evaluated data is used in a) Assessing the overall biological evaluation of a medical device (ISO 10993); b) Screening of potential new materials and/or processes for suitability in a medical device for a proposed clinical application. The compositional characteristics of the materials of manufacture are mainly under the control of the suppliers of these materials. However, other characteristics are chiefly influenced by the requirements to be met by the finished medical device as well as the production processes used by the medical device manufacturer. …show more content…
However there are several examples of where these relationships are becoming better understood, as listed below. 1) The use of certain PMT characteristics of porous materials as surfaces on orthopedic implants can encourage tissue in-growth at the surface of the implant and thus result in better integration with the surrounding tissue. 2) The use of material scaffolds and meshes, with certain PMT characteristics, as implants into injured soft or hard tissue can facilitate the beneficial infiltration of certain types of cells which aid the healing process 3) The PMT characteristics of the surfaces of materials used as catheters have a major influence on the adherence of bacteria and proteins to the inner and outer surfaces, which in turn influences the risk of infections and blockages. 4) Alterations to the micro-topography of surfaces, e.g. producing microgrooves or other defined patterns, have been shown to influence the adhesion and direction of movement of certain types of cells on that
Title: Introduction: A-mountain lies in Southern Arizona, a region known as a desert. There are factors that contribute to the growth of certain plant life in certain areas. The north and south side of the mountain is expected to have contrasting difference due to the amount of sunlight each side receives. Exposure to sunlight affects the plants growth and overall life.
Minerals 1. The minerals under the DRI for my age group would be calcium, potassium, sodium, copper ,iron, magnesium, phosphorous, selenium, and zinc. The mineral that comes below the DRI would be be potassium. However, it is not more than 80% below the DRI. However I did have a low potassium intake.
Mesa Verde is most well known for its cliff dwellings found in the sandstone of its dynamic landscape. The Mesa Verde National park was originally established for the main purpose of preserving these very same archaeological sites. Without the geology of the area these dwellings might never have come to be, or preserved so splendidly. While it has many different geological formations on the property John Carrara states that “The Mesa Verde is essentially a broad, flat, upland surface sloping gently to the south and dissected by deep canyons containing ephemeral streams.” (Carrara 2014) The majority of the rock formation found in the park were formed from sediments from the crustaceous age (Carrara 2014) .
Unknown compounds verification Introduction: In Project 3 we are going to test an unknown compound and there are several different ways that can help us to identify the Unknown substance. And there is some pre-lab information that found in the internet. By Experiment 3: Identification of a Substance by Physical Properties “Every substance has a unique set of properties that allow us to differentiate one from another. These properties can be classified as either physical properties or chemical properties.
Any person interested in engineering, biology and chemistry would be curious about these implants. Engineers because they would most likely be designing, coding and making these products. Biology major would be interested because they would be curious how the body would interact and work with the implants. Chemists are most likely interested because they would help make the product so the body would not reject the implant. Although a person does not need to be interested in these field to be curious about the product.
As such, the issue of the mismatch can be addressed by coating the electrode in a soft conducting polymer that has a Young’s modulus as close to the tissue as possible. This way, the electrode remains stiff enough to easily move through the tissue while having a soft barrier to minimize the damage of the
The concept of prosthetics goes further than just making custom fitted artificial limbs for
The increase of contracting infections in acute settings and intensive care units is currently of great concern. If these infections go untreated, it can consequently cause the loss of life, and increase mortality and morbidity. Centers for Medicare and Medicaid Services (CMS) will not pay for infections that were acquired during a hospital stay. This affects hospitals, preventing them from being financially fruitful. Urinary tract infections (UTI) are one of the most common nosocomial infections reported.
In the novel Across a Hundred Mountains, Reyena Grande tells the story of a young girl who takes the risk to travels to the United States to find her father, Miguel. However, Mexican immigrants strive to come to the Unites states, but have challenges to face crossing the border. Throughout her journey, Juana make a sacrifice and starts a lives a new life; as Juana stays in Tijuana at a park late at night, Juana was mistakenly taken to jail. Police officers assume that Juana was the one that stole a man’s wallet. When Juana was put in jail, she meets a friend name Adalina Vasquez.
But product differentiation requires a lot more efforts in research and development as
Hospital-acquired infection can be referred to as a nosocomial infection. This is an infection that’s contracted from the staff and/or area of the healthcare facility/hospital. The staff can spread infection while dealing with the patient/s, as well as contaminated equipment, sheets from the bed and or air droplets can spread this infection. Sometimes the microorganism originates from the patient 's skin micro biota. Nosocomial pneumonia is a nosocomial bacterial infection that is mostly seen in surgical intensive care units (ICUs).
As previously stated, the following are the calculated RF values for each plate, Plate 1: Acetaminophen; Acetaminophen (Isolated)- 4.0/6.9= 0.57, Acetaminophen (Pure)- 3.8/6.9=0.55, Excedrin- 4.2/6.9=0.61 Plate 2: Caffeine; Caffeine (Isolated)- 1.9/6.8=0.28, Caffeine (Pure)- 0.8/6.8=0.12, Excedrin-4.0/6.8=0.59 and Plate 3: Aspirin; Aspirin (Isolated)-6.2/7.5=0.83, Aspirin (Pure)-6.2/7.5=0.83, Excedrin-6.8/7.5=0.9. The yield of each isolated analgesic was not calculated. The Rf values of the isolated acetaminophen, pure acetaminophen and Excedrin were all within 0.06. This is most likely due to the contamination of the TLC plate with Excedrin. During plating, drops of the Excedrin solution may have been introduced to the plate.
The Color of Water explores life in two very different perspectives, each with their own purpose and meaning of living. However, despite their vast differences, they are harmonious in a sense that these two distinct characters, James McBride and Rachel Shilsky, seeks for an identity that would ultimately satisfy their means for individuality and the awareness of their connection to the universe. For instance, James questions his true relation towards his so-called mother, as race sets them apart, and Rachel, though she omits to reveal her mysterious past, has found her value in society by her strong-will and sheer acceptance - embracing a culture that could cause personal harm to her life, yet unfazed at that. Having learned about the conflicts
Analysis There are lots of different types of volcanos, but they can be divided in three main types. The first one is the stratovolcanoes. It’s called like that after the Latin word “strato”, which means layer. They are usually high mountains that can erupt with a lot of power.
Fix or replace damaged tissue; biology has always been the main concern for scientists. Today, the most important instrument for tissue engineering scientists to produce replacement tissues and implants to repair or replace damaged tissue. Tissue engineering is generating a new field of study in which the principles of engineering and biology to correct the damaged tissue, uses and can renewal, operation and maintenance of tissue healing. In order to use an ideal scaffold Tissue engineering should have features such as non-toxic Cell and tissue properties to be fit.