1. The addition of small amounts of aqueous gentian violet, acriflavine, or acriviolet to suspensions of young cultures of B. anthracis reverses their Gram reaction, and diminishes their diameter about 40 per cent. 2. The time required for these changes varies with the strain of B. anthracis examined. 3. These changes are accompanied by a loss of weight. 4. Ninhydrin-positive substances are dem...

Since the publication of observations on the selective bactericidal action of gentian violet, 1 studies have been carried on in this laboratory with a large number of other dyes. The technique of divided plates, previously described, has been employed. The results with dyes similar in chemical structure to gentian violet have already been reported. 2 These dyes, like gentian violet, were found ...

BACKGROUND AND OBJECTIVE Use of hair dyes for glioma risk has been investigated in numerous epidemiological studies, but the evidence is inconsistent. Therefore, a meta-analysis was performed to estimate the association between hair dyes use and glioma risk. METHODS We searched PubMed and EMBASE databases without any limitations, covering all papers published by the end of March 8, 2013. Coho...

RNA-cleaving deoxyribozyme 8-17 has been increasingly used in nanotechnology and biosensing applications. Conventional methods to equip 8-17 with fluorescent signaling property usually involve covalent attachment of two dyes at nucleotide positions that are far away from the catalytic core, such that the bulky dye structures would not affect the deoxyribozyme activity. However, the maximum fluo...

Currently, biological method has been utilized in the treatment of wastewater -containing synthetic dyes used by textile industries in Iraq. The present work was devoted to study the operating feasibility using reverse osmosis (RO) and nanofiltration (NF) membrane systems as an alternative treatment method of wastewater discharged from Iraqi textile mills. Acid red, reactive black and reactive ...

Abstract The long-term stability of aerobic granules is critical for decolourization different dyes in textile wastewater. Here, we investigated dye and the acetate-cultivated after exposure to dyes. Results show that can maintain excellent structure with presence azo triphenylmethane during a 200-day operation period, achieving biomass concentrations as high 8–12 g L−1 90% 100% efficiency, res...

Paulownia tomentosa, a woody plant that is widely found in Pakistan and other regions of the world, was used as raw material to prepare activated carbon using chemical physical activation methods. Adsorption dyes- acid red 4 methylene blue onto prepared were analyzed by batch experiments. The impacts different adsorption parameters such pH, temperature, contact time, initial dye concentration a...

In the present study, five naphthalene-based azo dyes were obtained using classical azo coupling reactions. The structure of the dyes was characterized and confirmed by the UV-vis, FT-IR, 1H NMR and 13C NMR analyses. The solvatochromic behavior of the dyes was studied in a set of 10 solvents with different polarity and considerable results were obtained. The dyes were applied as disperse dyes t...

background and purpose: dye is widely used in industries such as cosmetic, leather, paper and textile and release to the environment via their effluents. the purpose of this study was to compare the efficiency of low-cost adsorbents in acid orang 7 dyes removal from water. materials and methods: the rice stem biomass was sun dried, crushed and sieved to particle sizes in range of 1-2 mm. then t...

Labeling of metastatic tumors can aid in their staging and resection of cancer. Near infrared (NIR) dyes have been used in the clinic for tumor labeling. However, there can be a nonspecific uptake of dye by the liver, lungs, and lymph nodes, which hinders detection of metastasis. In order to overcome these problems, we have used two NIR dyes (DyLight 650 and 750) conjugated to a chimeric anti-c...