Advantages And Disadvantages Of Microfluidics

In this experiment we observed carmine powder to better understand the concept of Brownian motion and the role of molecular movement in diffusion. The particles continuously moved in a completely random fashion, and the smaller particles moved with more speed than the larger particles.

The purpose of this experiment was to see if a penny could hold more drops of salt water or tap water. It was found that a penny could hold an average of 22.3 drops of tap water and only 20.8 drops of salt water. These results are consistent with the hypothesis: If the salt concentration of water impacts the amount of water a penny holds, then the penny will hold less drops with salt water. While dropping the water onto the penny, it was observed that the water formed into a dome-like shape on the penny. It looked like the individual drops of water turned into one large drop of water. This was observed for both the tap and salt water. This happened due to the cohesion and surface tension of water. Cohesion simply means that water molecules are attracted to each other and want to cling together. Surface tension is the special term that is applied to the cohesion of water molecules.

Aim: To plan and carry out an investigation to show the relationship between volume/Cm3, surface area, and diffusion using agar cubes measured in time/s; and to demonstrate, using diffusion, why the size of cells is limited, keeping the room temperature and pressure constant.

Random movement of solute (dissolved particles) and solvent (water molecules) will result in an evenly distributed solution.

The kinetic energy causes the particles to vibrate and move randomly – moving around the area in which they are held. The random movement causes the particles to distribute randomly around the area. The higher concentrated solution has more particles that can move across the membrane compared to the lower, producing a net movement down the concentration gradient.

In the article, a student in Brookville, NY asks about the behaviors of water—specifically, why it would become a sphere in space when it doesn’t have a shape. The author answers this by giving her a thorough explanation. She states that unlike liquids on Earth, which are content with staying at the “bottom of a glass”, liquids in space react differently in the nearly weightless environment of the space shuttles. Molecules in liquid water are mutually attracted towards one another, but, they do not mind breaking this bond. According to the author, that is the reason liquid water can take the shape of vessel it’s poured into. However, the water molecules at the surface are only attracted to other water molecules below them and sideways to them

Have you ever wondered why your cereal clusters together after milk is poured or why it sticks to the side of your bowl? Even if you try to pull them apart, they come together again. This is a spectacle that happens every day but we just don’t really notice it. Most people don’t really realize that it’s happening everyday. Using fluid mechanics, we can determine why floating objects come together due to surface tension, viscosity and buoyancy (Grayson, 2014).

Have you ever wondered why rain drops form little bubbles, or how water makes little bubbles on pennies? To properly understand my project, you will have to understand water surface tension, and how hydrophobic and hydrophilic molecules work. Also how surfactants work, and how surfactants can propel a (n) object.

PMMA housings (L=45 mm, W=30 mm), McMaster Carr) were designed in AutoCAD and cut with a CO2 laser. Individually cut layers (1.5 – 2 mm) were laminated together using pressure sensitive adhesive films to create rigid plastic housings containing L=25 mm, W=10 mm, H=1.5 mm cavities PDMS pieces containing the microfluidic channels (top) and the flexible nanotextured or plain PDMS surfaces (bottom). Laser-cut holes at the four corners accommodated cylindrical rare earth magnets (K&J Magnetics, 2.54 mm diameter, thickness=1.58 mm) which were then glued in place. Rare earth magnets were embedded in the PMMA and oriented such that the top and bottom housings had opposite magnetic poles facing one another to achieve a simple and self-aligned latching mechanism. The housings compressed the top PDMS channel against the PDMS capture surface and achieved a leak-proof seal (Figure 3.5(b)). Magnetic latching allowed the SEAM platform to be easily sealed and resealed as needed. The tubing was connected to the channel using a barbed fitting (McMaster), and a syringe pump was used to control fluid flow (Harvard Apparatus). The magnetic latching mechanism was sufficient to create a seal that could withstand the maximum

There’s a new digital map limning the composition of the seafloor, and it’s shown evidence of “microfossil” graveyards off the coast of Australia, in addition to other complex deep-ocean geology.

1). In microfluidic flows, particles can migrate one place to another place streamlines to focus at specific position in micro channels because of the inertial forces that overused for high throughput, size based particle and separation of cell. In other words, migration of particles occurs because of the inertial lift forces. Existing of inertial microfluidics devices provide to good separation resolution. In contrast, the use of inertial microfluidics is limited by the large red blood cells and diluted blood samples. However, many researchers use high throughput blood separation as dean flow technique with CTCs isolation from blood. In this way, they may solve the dilution problem a little bit. Consequently, although many recent advances in inertial microfluidics, there is a still need new technologies that provide continuous, high throughput and purity of viable CTCs from large blood

I sometimes watch a show called “Roseanne”. In this show there are three children and a mother and a father. In the show the mother was working two jobs and the father worked one. The children were home a lot to fin for themselves. In this episode I saw several parts of the Bioecological Model of Human Development. If we look at the microsystems there are several components. Which were the child, family, school and the community. In the episode the mom had to go and interact with the school (Mesosystem) because one of the children were not behaving in school. The teacher made an assumption about of the child’s behavior and thought that the child was acting out due to the parents not getting along. The mother in the show got mad and took it out on the teacher which in turn created negativity in the child’s eyes because the teacher was

Ceramic beads with diameters from 0.15 to 1.00 millimeter (mm) flowed easily through the funnel apparatus, but those below 0.15 and above 1.00 did not. Those beads with diameters below 0.15 fell in a series of little avalanches, with a short pause in the bead flow after each avalanche. This pausing

As of November 30th, 2017, 116,080 people formed the organ transplant waiting list. On average, twenty people on this list will die today. The number of people that need an organ transplant continues to grow; every ten minutes a new name is added to the list. According to the U.S. Department of Health & Human Services, “only 3 in 1,000 people die in a way that allows for organ donation” (“Organ Donation Statistics”). In order for a deceased person to give organs, the organs must still be alive to donate. Organ transplantation improved greatly over the last century, but with an insufficient amount of organs available, it limits breakthroughs. In essence, new methods need to replace the unavailable organs. These methods drastically improve the process of organ transplantation, and in the future, the overall humans well-being.

We live in a time where technology is improved and advanced every single day. The health care environment is no exception. The technology used for health care is constantly being refined and advanced in hopes to allow even better and more efficient care. One of these technological advancements that could revolutionize health care is 3D printing. Benefits 3D printing could provide include construction of prosthetic limbs as well as anatomical models aimed at determining patients’ needs and many more (Ventola, 2014). However, there are also disadvantages of this technology and one of the main disadvantages is the security issues it presents. There are both advantages and disadvantages of 3D printing but there is no denying the promise of this technology and the potential impact it could have.