Silica gel

function of gel electrophoresis? Way to sort and measure DNA strands according to length. This technique is also useful for separating other types of molecules, like proteins. 2. Where are DNA samples placed in the gel? DNA samples are placed into wells at one end of the gel. 3. What makes the DNA move across the gel?
By adding electrical current DNA moves. 4. Why do DNA fragments of different lengths travel to different locations on the gel? **Short fragments move through the wells in the gel…

biomolecule lab, we conducted the lipid chromatography experiment to separate a mixture of biomolecules from lipids. If a positive test is conducted by the end of the experiment, there should be smudges aligned vertically on the chromatography paper, or silica gel strip, indicating the separation of different lipid molecules that were present in the substance. In contrast, if a negative test is conducted there would be no smudges aligned vertically on the chromatography paper. Substances Tested…

Identifying an Unknown Compound Using Various Chemical Analysis Techniques Joshua Nash and Aquilla Young Abstract The introduction of this lab report exposes the reader to the different scientific concepts that are to be used such as melting point calculations, retention factors, and solubility in various aqueous solutions. The experimental provides the basics of using a melting point apparatus, determining solubility, and performing thin layer chromatography. In the results section the findings…

to provide adequate coverage for the back, hip, abdomen and thigh. FLEXIBLE COLD THERAPY: The gel ice pack remains flexible when frozen to easily contour to the body to provide targeted cold therapy relief. SAFE FOR SENSITIVE SKIN: Safe for everyone, the gel cold pack is constructed with soft, latex-free vinyl that is filled with a non-toxic…

strength and workability using magnesium silicate hydrate system. Binary systems containing magnesium oxide and amorphous silica (silica fume) were studied in which amount of each constituent accounted for 40-60% by mass of the binder. It is found that magnesium silicate hydrate binder system requires very high water demand compared to Portland cement due to high microfine content of silica fume and light specific gravity. It is only possible to produce workable mixes in use of suitable…

Data and observation collected from column and TLC (silica stationary plate) on a mixture of ortho and para nitroaniline .The eluent used was a mixture of hexane and ethyl acetate, (13 ml) and (7 ml), respectively; the mobile phase used for the TLC was acetone. Fraction collected from elution of the dry…

contain unreacted silica fume particles in low water content mixtures, results in poor particle packing and reduces strength. As testing both binary and ternary systems, the optimal binder composition for strength was observed with mixture of 60/40 MgO/SF ratio instead of 40/60 MgO/SF ratio as required by stoichiometry for chemical reactions to form M-S-H gel. The optimal binder composition, therefore, is dependent not only on the MgO/SiO2 ratio for maximum formation of M-S-H gel, but also the…

were still identified by calculating and recognizing the similarities in their ratio to front values. Given that the stationary phase utilized in this experiment consisted of silica gel, a very polar substance due to the large amount of hydroxyl groups present on the surface, more polar components should travel less on the gel. Polarity creates a slight negative atom and a slight positive atom due to the differences in electronegativity. This may cause a more polar component to have a…

and the product of “N” and “t”, the air exchange rate per day and the maximum number of days on display, respectively. This calculated product is then divided by the product of “MH” and “F”, which both have to do with the buffering range of the silica gel and its limit placement on RH fluctuations. “Q” was found in kilograms, and a simple unit conversion was used to find this number in…

Samples without filler, although contain highest gel volume but also requires highest water content in the series (w/b=0.36) and consequently has lowest 28-day compressive strength of 43.7 MPa. The introduction of filler content, as at only 10%, is able to reduce water content dramatically to w/b=0.27…