Part A of this Activity called “Preparing a Dry Mount”? Why is Part B of this Activity called “Preparing a Wet Mount of Cells”? Explain the difference between wet and dry mount preparation.
Part A is called Preparing a Dry Mount and part B is called Preparing a Wet Mount of Cells in this activity. Part A used a paper letter “e”, a paper is a solid dry object like dust particles or a feather. Part B, we used onions, blue methylene and water. It's called a “Wet Mount” since we used a liquid substance (blue methylene and water).Wet mounts are used with a piece glass concave slide and a solid object for viewing it. A drop of water or other liquid substances is dropped onto the object and a cover slip is slid on top of the liquid. The tension of the surface of the water automatically will close the cover tight to the slide while still holding the object in place for accurate, focused viewing. Dry mounts are also used with a piece of a flat slide but only with a solid object instead of dropping liquid substances on the object. Onion is a live cell, using a wet mount will help the onion cell to last longer. A letter “e” is not a live cell, using dry mount would be easier, it’s the same either if you use dry mount or wet mount, but making a dry mount is easier than a wet mount. If you…
discuss more scientific parts of this lab, such as the surface tension when the cylinder was close to overflowing for both the milk and water. Before performing this lab, my group and I created a hypothesis to reflect upon and to state what we believed would dictate the results.
The hypothesis stated that if we filled the dropped pennies into the graduated cylinder at 100 mL of milk, then the amount would be greater than that of the water. This hypothesis was proven wrong. Instead,…
solution, usually aqueous, containing soluble salts of the constituent atoms of the desired compound onto a heated substrate. Every sprayed droplet reaching the hot substrate surface undergoes pyrolytic (endothermic) decomposition and forms a single crystallite, or a cluster of crystallite of the product. The other volatile by-products and the excess solvent escape in the vapour phase. The substrate provides the thermal energy for the thermal decomposition and subsequent recombination of the…
water. The fountain was made of pure white stone with flecks of blue to cover it. Standing in the middle of the pool was a hooded man with one hand raised in front of him as if to stop someone. Water gushed out of where the man’s eyes were, but it was hard to tell because of the flickering light of the torches. A low stone wall made of the same stone as the statue made a large ring that caught all the water. The stone ring was about ten yards in diameter, which made it big compared to the rest…
Fig. 6 shows the results of air permeability, total water absorption, and voids. R mortars had lower permeability than the mortars with WTS. Air permeability of R was 1.13 x 10-13 m², a value 5 times higher than L60. The air permeability increased with increasing WTS content. The water absorption values ranged from 10.6% to 13.7%, and the voids from 9.6% to 12%. The results show that WTS replacement increased the porosity and permeability of geopolymer mortars. The geopolymer binders with WTS…
Once inside of the large bathroom, Jimin turns the tub on and waits until it's at a good temperature and doesn't scorch the hybrids skin, then lets it run until it's halfway filled. He turns to Jungkook, "Do you want me to leave while you wash up?"
Jungkook's eyes widen, "No no! Don't leave," then he quiets down as a blush covers his cheeks, "M-Master always cleaned me. I don't like cleaning myself."
A nod comes from Jimin's end, "Well then let's get you out of these gross clothes, okay…
This implies the film thickness vanishes that this critical value and then the motion becomes impossible.
One of the main objectives of this study is to discuss the surface tension effect, according to thermosolutal Marangoni convection effect, on the motion. The increase of the temperature surface tension parameter and the concentration surface tension parameter means a decrease in the surface tension according to the negative values of the coefficients and . So, the reduction of the…
a. Surfactant: A surface-active agent that lowers surface tension
b. Surface Tension: Force caused by attraction between like molecules that occurs at liquid-gas interfaces and that holds the liquid surface intact
i. Units of Measure: dynes/centimeter (dyn/cm)
1. the force required to cause a 1 cm rupture in the surface film
ii. a droplet forms because a liquid’s molecules are more attracted to each other than the surrounding…
September 18, 2014
Surface Tension of Water
How does soap affect the surface tension of water?
The surface tension of water is due to cohesion forces that allow water to stick to its same molecules. In a liquid, such as water, molecules are strongly attracted by each other causing a phenomenon called surface tension of water. Surface tension could be defined as the force that implies a liquid to resist external forces produced by…
followed by rinsing with water for 20s.
All the teeth were dried and dentin bonding agent was applied onto the cavity with a applicator tip. The bonding agent was applied gently into the cavity for 10 s. the bonding agent was left for a period of 10 s and the excess was removed using a air stream, followed by light curing for 20 s.
The restorative procedure was performed by inserting composite in three horizontal increments. Each increment was individually light cured for 20 s from all the…