Y5-13 Synthesis

Abstract: The purpose of this experiment is to use the apparatus shown in figure 7-1 of experiment 6 found in the lab manual, to synthesize [1,3,5-C6H3(CH3)3]Mo(CO)3.(2016 Oleg) With this, characterization of the molecule can be accomplished using the infrared spectrum and NMR spectrum of the synthesized compound. It was found in the IR spectra of the product, that suitable stretches were found associated with the C-O bonds of mestylene and molybdenum. With One strong spectra was found at 1855.3973 cm-1 , one medium strength spectra was found at 1942.6002 cm-1 , and one weak spectra of C-O stretch was found at 1298.8638cm-1 . The 1H NMR spectrum of the product showed peaks at δ 2.28 and 5.25, while the H NMR spectrum of mesitylene gave peaks at δ

The purpose of this lab was to utilize roasting, smelting, spectroscopy, and the carbonate test in order to determine the identity of an unknown copper mineral. I determined that the most useful of these tests in determining the mineral was roasting because it provides a fairly accurate percent composition of copper in the unknown mineral.

This lab could have contained errors. The errors could have happened when performing the lab. Some of the possible errors in this lab are:

The first part of the Identification and Synthesis of an Unknown Ionic Compound (Project 3 Week 1) experiment was to determine the unknown compound #202 that is given to the experimenter. The second part to the experiment (Project 3 Week 2) was to discover different tests the experimenter can conduct in order to prove that they have the specific ionic compound that they discovered in part one. Some of the ways that the experimenter can determine the unknown compound #202 they have includes, preliminary tests, physical state tests, solubility testing, analysis of anions, analysis of cations and flame tests (Dealing with Unknown Compound). There are many ways an experimenter can determine the ionic compound that they have, including pH tests, flammability tests (liquids and solids), solubility tests and heavy metal tests, just to name a few (Identifying Unknown Chemicals in Science Labs).

made supported one another. For instance, we observed that the red powder turned black when heat was applied, therefore Oxygen from

This source is an online encyclopedia article that I found about yeoman, a crucial part of my Synthesis project. “You are a yeoman archer with a longbow. Write a letter home extolling the virtues of your weapon and formulating a tall tale.” This was the exact reading of the project that I was assigned, but there was a small problem, what is a yeoman? At first, I read the instructions so that the word was Yemen archers. I thought that they were just mercenaries fighting for the English. On closer inspection, I realized that the instructions in fact said yeoman, which led me to try and find out what a yeoman was. Encyclopedia Britannica defines yeoman as, “In English history, a class intermediate between the gentry and the labourers; a yeoman

Then, the calcined powders were ground again using agate mortar for 3 h and further calcined at 1400 °C for 12 h. Thereafter, the powders were ground again by agate mortar for 3 h. These powders were then pelletized and the resultant pellets were further sintered at 1450°C for 15 h in a tubular furnace to get the required samples. The prepared

“No matter what we are, and what we sing, Time finds a withered leaf in every laurel” (Robinson). “Richard Cory” written by Edwin Arlington Robinson, tells a simple yet thought provoking story of a charming man who everyone envied, because he seemed to have his life completely well put together. In the poem, the people of the town seemed to be unhappy and resent what they thought was a humdrum life. But it was Richard Cory who was the one truly not happy, the moral of the poem is: appreciate your current status because money certainly does not buy happiness. Even the richest, most good looking people in the world have problems. Just because a person looks like

The results of the experiment were compared. As seen in the observations above, most data seemed to imply that there is more DNA in the pea sample. At the end of the experiment, three layers were visible, one was an alcohol layer at the top, a DNA precipitate and a suspension at the bottom (green homogenate for peas and yellow for onion). After comparing the key findings, it was determined that the hypothesis made before the experiment was incorrect. Cells with more chromosomes have more DNA but it is not noticeable visually. The amount of DNA that can be seen visually is dependent on the cell volume. Peas have a small cell volume as they have a small amount of water in the cytoplasm, which produces a lot DNA (“Genetic Science Learning Center”

The result was vacuum filtered, whereas the precipate was collected for analysis. The precipate was dried and weight at 0.61 gs, resulting in a percent yield of 58.4%. The melting point was discovered to be 1220124 degrees C, and the IR spectrum resulted in two noticeable peaks at 3367.18 cm-1 and 3181.04

Mercury belonging of six chemist elements which the most poisonous among the six million substations in nature 1. This compound was very poisonous for biologis system 1-2. The contamination of mercury could be decreased by bioremediation method, because this method proved more efficient and economic than the physical or chemical ways 3-4. Organisms respond to heavy metal stress using different defense system, such as exclusion, compartmentalization, formation of complexes and synthesis of binding proteins like metallothioneins 5. Bacteria use the intracellular mechanism for mercury detoxification process, by reducing the Hg2+ to non toxic Hg0, by a group of mercury reductase enzyme that incorporated in the mer operon. Hg0 formed then diffuses out of the cells 6. Mer operon structure is varied, consisting of genes that encode functional proteins for regulation (merR), transportation (MerT, merP and or merC, merF) and for reduction (merA). In species with broad-spectrum resistance, merB genes, these genes required for resistance to organomerkuri compounds, such as methylmercury and phenilmerkuri, by hydrolysis of the C-Hg bond before reducing Hg2+. Additional genes are located in the downstream (downstream) of the gene in the operon merA. MerB gene is rarely found in Gram-negative bacteria 7-8.

PTEN (Phosphatase and tensin homolog) is a phophatase known for negatively regulating the pathways downstrteam of AKT (protein kinase B), which are involved in cell survival, proliferation and migration. In the central nervous system (CNS), Pten mutation can cause hypertrophy and ectopic ramification of dendrites, macrocephaly and increase of anormal synapses. Along with these morphological anomalies, alterations in memory processes, synaptic plasticity and neurogenesis are also observed. Accordingly, there are several diseases associated to Pten mutations, including autism spectrum disorders. On the other hand, physical exercise when practiced during pregnancy can provide beneficial effects to the offspring, including improved short-term memory and learning and

The synthesized SBA-15 (1 g) was dispersed in deionized water (20 mL) for 20 min. Then, AEPH2 (0.7 g) was added portion by potion to the resulting suspension and the obtained mixture was vigorously stirred at room temperature for 12 h. Subsequently, the resulting SBA-15@AEPH2 was collected by centrifugation, washed with ethanol (3 × 15 mL) and dried at ambient temperature, overnight.

WASHINGTON— Is it ironic or is it coincidental? The information about how U.S infiltrates foreign network and defends against cyberattack got hacked by an allegedly Russian hacker. It started when the NSA’s contractor brought a classified material to home and targeted by the hackers through a Moscow-based anti-virus software, Kapersky Lab.

The majority of TBCs in use today are ZrO2-based having a composition containing ∼8 wt% Y2O3 (8YSZ). Originally, this ceramic was selected empirically based on its low thermal conductivity (~1 W/mK), high