T. Heinze et. al. reported the synthesis of new 6-deoxy-6-pheylethylamino cellulose derivatives with DSamino 0.4-0.6 by nucleophilic displacement of cellulose tosylates (DSTos 0.74 and 1.29) with a racemic mixture of 1-phenylethylamine under homogeneous conditions, in DMF/H2O82, scheme 30. The optical properties of these deoxyamino cellulose derivatives was studied.
A regioselective synthesis of 6-amino-6-deoxycellulose, 6-N-sulfonated, and 6-N-carboxymethylated deoxycellulose were…
“Books and movies are like apples and oranges. They are both fruit, but taste completely different.” (Stephen King). In Nicholas Spark’s novel Safe Haven and Marty Bowen’s movie Safe haven this is the case. In this story a wife that is being abused runs away for abusive husband. Her husband, an investigator, tries to find out where she went. After finding love she starts to make a new family; however, her abuser finds out and threatens her new family. When a movie is made from a book, they…
The aim of this experiment is to determine through calculations the concentration of acetic acid content within a common white vinegar.
Apparatus / Materials
Volumetric flask and lid
Volumetric pipette/s (5mL, 20mL)
Place the plastic tray on the electronic scales and press tare to set the wither to zero;
Weigh out 0.7993g of Sodium…
Titrating Vinegar with Sodium Hydroxide (NaOH)
Acids are anions that have at least one hydrogen cation tacked onto their molecular formulas. The Bronsted definition of an acid states that acid is a proton, H+, donor.3 Acids can fall into one of two categories: they can be strong or weak. Strong acids completely dissociate their H+ and weak acids only partially dissociate their H+.3 This means that a strong acid cannot return to its initial state once it undergoes a reaction. On the…
Determination of λ max
Gemifloxacin mesylate λ max is determined by preparing one standard concentration of 10μg/ml and scanning should be done.
Preparation of 0.1N HCL
8 ml of hydrochloric acid is taken in 1000ml volumetric flask and dissolved with distilled water and then make up to 1000ml with distilled water.
Standard graph of Gemifloxacin mesylate:
The λmax of Gemifloxacin mesylate in 0.1N HCL was scanned in UV-Visible Spectrophotometer and found to have maximum…
The objective of the present study is to isolate piperine from the black pepper. Our attempt was to extract the piperine with petroleum ether from black pepper and isolation using the same solvent. It is very difficult to extract and isolate the piperine using a non-polar solvent like petroleum ether due to solubility. During our study, we observe that piperine have a very little solubility in the petroleum ether, at the same time the solubility of the resinous material in petroleum ether is…
3. Results and discussion
3.1. Qualitative and quantitative phytochemical analysis
Preliminary phytochemical screening of the aqueous extract of both CBE and CQE showed the presence of alkaloids, flavonoids, reducing sugar, phenols, steroids like terpenoids and saponins (Table 1), whereas tannins are absent. Table 2. shows the quantitative analysis of phytochemicals of CBE and CQE. The concentration of phyto-constituents varied between the plants and also within the plant. The total steroid…
HPLC column can be categorized into two types
• Reverse Phase
• Normal Phase
22.214.171.124. Reverse Phase Chromatography
Reverse Phase system has a non-polar stationary phase over which polar solvents are used as mobile phase; it is generally used for separation of polar species.
126.96.36.199. Normal phase chromatography
Normal Phase system has a polar stationary phase over which non-polar solvents are used as mobile phase; it is generally used for separation of non-polar species.. A detection…
[Qin Yi, Fan Hui Li et.al, 2012] using Dimethyl terephthalate instead of part of phthalic anhydride prepared Polyester resin with the excellent flexibility. He then used sol-gel technology to prepare silicone-modified polyester resin. The properties of the coting film, such as hardness, flexibility, solvent resistance and adhesion were studied and optimized. When compared with commercially available coloured polyester coating SM 3911, the flexibility, adhesion, rigidity , MEK resistance and…
acids do. Lower molecular mass organic acids such as formic and lactic acids are miscible in water, but higher molecular mass organic acids, such as benzoic acid, are insoluble in molecular (neutral) form. A few examples of organic acids include:
• Acetic acid (ethanoic acid ) CH3COOH
• Citric acid…