Fig. 3. Bromination of phenol red used to detect halogenating activity qualitatively. Owing to bromination, a marked color change occurs from yellow (at acidic to neutral pH) to deep blue or purple, which can easily be detected by eye. However, the marked color change allows visual screening...
Noun1.phenolphthalein- a laxative used in many preparations under various trade names; also used as an acid-base indicator in titrations involving weak acids and strong bases because it is brilliant red at high alkalinity and colorless below pH 8 ...
To measure the agreement between Schirmer's and phenol red thread tests in detecting dry eyes. A total of 103 patients attending preoperative cataract assessment clinic who agreed to be involved in the study were recruited. Each patient had one eye exami
Chloroform and benzene and mixtures of petroleum spirits, and single aliphatic hydrocarbons with ethyl acetate, diethyl ether, acetone and methanol were used to separate butter yellow, Sudan orange R (CI 12055), Sudan III (CI 26100) and Sudan red BB (CI 26105). The anthraquinone series of ...
Under visible light irradiation, o-phosphinophenolate functions as an easily accessible photoredox catalyst to activate trifluoromethyl groups in trifluoroacetamides, trifluoroacetates, and trifluoromethyl (hetero)arenes to deliver corresponding difluoromethyl radicals. It works in relay with a thiol hydrogen...
Aging of novolac causes change of its color (from creamy to yellow) and deterioration of mechanical properties. In order to inhibit aging process of resins it is important to know what chemical changes cause these unfavorable physical changes. Inverse gas chromatography (IGC) can be used for eval...
Dissimilar residues are written in black letters and conserved residues outside the SRSs are represented in white with a red background. The conserved secondary structures of HpCYP81AA1 and HpCYP81AA2 are indicated at the top and the bottom, respectively. The black triangles point to positions...
Phenol can undergo oxidation. Oxidized phenol will appear yellow or red in color (instead of clear) when saturated with water or buffer. Phenol and chloroform should be used in a hood if possible. Phenol is a dangerous substance that will burn you if it gets on your skin. WEAR GLOVES and...
Surface morphology (scanning electron microscope (SEM)) using CARL-ZEISS model Merlin Compact equipped with Oxford X-Maxn energy dispersive X-ray (EDX) analyzer, surface functional groups were analyzed using BRUKER TENSOR-27 Fourier transform infra-red (FTIR) spectrometer. X-ray photoelectron ...
The role of PSMα4 in the stimulation of vascular leakage was confirmed by the results of the mouse infection model; red blood cells were clearly present in the lungs of mice infected with the wild-type strain, whereas they were absent in the lungs of mice infected with the PSMα...