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Small (Weinheim An Der Bergstrasse,... Jun 2018Phototheranostics, which simultaneously combines photodynamic and/or photothermal therapy with deep-tissue diagnostic imaging, is a promising strategy for the diagnosis... (Review)
Review
Phototheranostics, which simultaneously combines photodynamic and/or photothermal therapy with deep-tissue diagnostic imaging, is a promising strategy for the diagnosis and treatment of cancers. Organic dyes with the merits of strong near-infrared absorbance, high photo-to-radical and/or photothermal conversion efficiency, great biocompatibility, ready chemical structure fine-tuning capability, and easy metabolism, have been demonstrated as attractive candidates for clinical phototheranostics. These organic dyes can be further designed and fabricated into nanoparticles (NPs) using various strategies. Compared to free molecules, these NPs can be equipped with multiple synergistic functions and show longer lifetime in blood circulation and passive tumor-targeting property via the enhanced permeability and retention effect. In this article, the recent progress of organic dye-based NPs for cancer phototheranostic applications is summarized, which extends the anticancer arsenal and holds promise for clinical uses in the near future.
Topics: Animals; Coloring Agents; Humans; Nanoparticles; Neoplasms; Organic Chemicals; Phototherapy; Theranostic Nanomedicine
PubMed: 29611290
DOI: 10.1002/smll.201704247 -
Methods in Molecular Biology (Clifton,... 2008Dye affinity chromatography is a purification technique offering unique selectivities and high purification factors. Dye ligands may act as substrate analogs, offering...
Dye affinity chromatography is a purification technique offering unique selectivities and high purification factors. Dye ligands may act as substrate analogs, offering affinity interactions with their corresponding enzymes. This chapter describes a dye ligand chromatography technique for purifying proteins from overexpression, in mammalian cell culture. The method begins with batch binding in order to rapidly select binding and elution conditions. Subsequently, gradient elution is employed to maximize the selectivity of the final packed bed chromatography method. Conditions for purification of a protein from mammalian cell culture on Cibacron blue are given with an accompanying sample chromatogram.
Topics: Chromatography, Affinity; Coloring Agents; Ligands
PubMed: 18826048
DOI: 10.1007/978-1-59745-582-4_5 -
Biotechnology Letters Dec 2020The considerable demand for dyes worldwide has triggered a surge in their production globally. The extensive application of dyes and inefficient dyeing processes has... (Review)
Review
The considerable demand for dyes worldwide has triggered a surge in their production globally. The extensive application of dyes and inefficient dyeing processes has elevated the risk of environmental pollution. The effluents from dying industries contain toxic compounds that are dreadful to both the environment and living beings. Besides, conventional effluent treatment processes have proved ineffective in clearing the dye from the effluent. The sole way of tackling this problem would be by applying a more rational approach that would be sustainable and efficient. After a thorough study of the literature, we are convinced to say that cyanophyceae and algae could serve as one of the promising biodecolorizing agents substituting most other biosorbents used in conventional biological effluent treatment technology. To evidence this we compiled data from the literature, wherein, various algal biomasses capable of decolorizing dye effluents have been examined. This paper also gives comprehensive facts on the mechanism of decolorization, pretreatment, influencing factors, and toxicity of treated products.
Topics: Biomass; Chlorophyta; Coloring Agents; Cyanobacteria; Environmental Pollution; Humans; Water Decolorization; Water Pollutants, Chemical
PubMed: 32940871
DOI: 10.1007/s10529-020-03005-w -
Journal of Environmental Management Oct 2010Dye wastewater is one of the most difficult to treat. There has been exhaustive research on biosorption of dye wastewater. It is evolving as an attractive option to... (Review)
Review
Dye wastewater is one of the most difficult to treat. There has been exhaustive research on biosorption of dye wastewater. It is evolving as an attractive option to supplement conventional treatment processes. This paper examines various biosorbents such as fungi, bacteria, algae, chitosan and peat, which are capable of decolorizing dye wastewaters; discusses various mechanism involved, the effects of various factors influencing dye wastewater decolorization and reviews pretreatment methods for increasing the biosorption capacity of the adsorbents. The paper examines the mismatch between strong scientific progress in the field of biosorption and lack of commercialization of research.
Topics: Adsorption; Bacteria; Biodegradation, Environmental; Chitosan; Coloring Agents; Eukaryota; Fungi; Soil; Textile Industry; Water Pollutants, Chemical; Water Purification
PubMed: 20627542
DOI: 10.1016/j.jenvman.2010.05.003 -
Dalton Transactions (Cambridge, England... Mar 2021Water is vital for the sustenance of all forms of life. Hence, water pollution is a universal crisis for the survival for all forms of life and a hurdle in sustainable... (Review)
Review
Water is vital for the sustenance of all forms of life. Hence, water pollution is a universal crisis for the survival for all forms of life and a hurdle in sustainable development. Textile industry is one of the anthropogenic activities that severely pollutes water bodies. Inefficient dyeing processes result in thousands of tons of synthetic dyes being dumped in water bodies every year. Therefore, the efficient removal of synthetic dyes from wastewater has become a challenging research field. Owing to their tuneable structure-property aspects, metal-organic frameworks (MOFs) have emerged as promising adsorbents for the adsorptive removal of dyes from wastewater and textile effluents. In this perspective, we highlight recent studies involving the application of MOFs for the adsorptive removal of hazardous dye molecules. We also classify the developed MOFs into cationic, anionic, and neutral framework categories to comprehend their suitability for the removal of a given class of dyes.
Topics: Adsorption; Coloring Agents; Metal-Organic Frameworks; Water Pollutants, Chemical
PubMed: 33565532
DOI: 10.1039/d0dt03824e -
ChemSusChem Feb 2015Since the establishment of dye-sensitized solar cells in the early '90s, both the efficiency and stability of these third generation photovoltaics have been greatly... (Review)
Review
Since the establishment of dye-sensitized solar cells in the early '90s, both the efficiency and stability of these third generation photovoltaics have been greatly enhanced. Nevertheless, there still exist many unwanted processes that impede operation of dye-sensitized solar cells, encumbering the achievement of the maximum theoretical power conversion efficiency and decreasing the devices' long-term operation. These processes include charge recombination, dye aggregation, dye desorption, and high protonation degrees of the semiconductor's surface. This Minireview focuses on a powerful strategy developed to address these problems, namely the use of co-adsorbents. All types of co-adsorbents utilized thus far are categorized in terms of the chemical identity of their anchoring group; in addition their operational mechanisms are presented and the properties that a functional molecule should possess to be applied as an efficient co-adsorbent are discussed.
Topics: Adsorption; Coloring Agents; Electric Power Supplies; Solar Energy
PubMed: 25650987
DOI: 10.1002/cssc.201403211 -
Frontiers in Bioscience (Landmark... Jan 2013This chapter provides an overview of the chemical structures and properties of aromatic amines and their role in the development and utility of azo dyes. Approaches to... (Review)
Review
This chapter provides an overview of the chemical structures and properties of aromatic amines and their role in the development and utility of azo dyes. Approaches to the design of environmentally benign alternatives to genotoxic primary aromatic amines, as azo dye precursors, are included.
Topics: Amines; Azo Compounds; Cellulose; Coloring Agents; Cotton Fiber; Mutagens
PubMed: 23276915
DOI: 10.2741/4093 -
Current Protocols in Protein Science May 2001Dye affinity chromatography is a protein purification procedure based on the high affinity of immobilized dyes for the binding sites on many proteins. It is a rapid,...
Dye affinity chromatography is a protein purification procedure based on the high affinity of immobilized dyes for the binding sites on many proteins. It is a rapid, inexpensive, and versatile method that is applicable to the purification of crude cellular extracts. This unit presents protocol for the three types of dye affinity chromatography: negative chromatography, positive chromatography, and tandem chromatography. An initial protocol describes a chromatographic procedure in which a small volume of the protein mixture to be purified is applied to a series of miniature columns, each containing a different immobilized dye. Analysis of the flowthrough and bound material allows determination of the optimum dye material for larger-scale purification. An alternate procedure describes a similar initial selection procedure using centrifugation instead of chromatography. A support protocol describes a simple procedure for immobilization of free dyes.
Topics: Chromatography, Affinity; Coloring Agents; Proteins
PubMed: 18429211
DOI: 10.1002/0471140864.ps0902s00 -
Journal of Nanoscience and... Feb 2014To achieve higher power conversion efficiency of dye-sensitized solar cells, anatase TiO2 nanotubes anodized and transferred onto fluorine doped tin oxide glass. This... (Review)
Review
To achieve higher power conversion efficiency of dye-sensitized solar cells, anatase TiO2 nanotubes anodized and transferred onto fluorine doped tin oxide glass. This technique is a promising candidate to improve the efficiency due to its outstanding properties, such as high light scattering effect, high surface-to-volume ratio, which result in enhancing light harvesting, minimum trapping sites, and low recombination rate. In this review, the structure, fabrication, and property of the TiO2 nanotube photoanode is compared with other photoanodes. In addition, the integration of a heterojunction and other advancements into the TiO2 nanotubes for getting better performance is also briefly discussed.
Topics: Coloring Agents; Electric Power Supplies; Electrodes; Equipment Design; Equipment Failure Analysis; Materials Testing; Nanotubes; Particle Size; Solar Energy; Titanium
PubMed: 24749414
DOI: 10.1166/jnn.2014.9137 -
Bioengineered Dec 2021Rapid industrialization has provided comforts to mankind but has also impacted the environment harmfully. There has been severe increase in the pollution due to several... (Review)
Review
Rapid industrialization has provided comforts to mankind but has also impacted the environment harmfully. There has been severe increase in the pollution due to several industries, in particular due to dye industry, which generate huge quantities of wastewater containing hazardous chemicals. Although tremendous developments have taken place for the treatment and management of such wastewater through chemical or biological processes, there is an emerging shift in the approach, with focus shifting on resource recovery from such wastewater and also their management in sustainable manner. This review article aims to present and discuss the most advanced and state-of-art technical and scientific developments about the treatment of dye industry wastewater, which include advanced oxidation process, membrane filtration technique, microbial technologies, bio-electrochemical degradation, photocatalytic degradation, etc. Among these technologies, microbial degradation seems highly promising for resource recovery and sustainability and has been discussed in detail as a promising approach. This paper also covers the challenges and future perspectives in this field.
Topics: Coloring Agents; Filtration; Industrial Waste; Wastewater; Water Pollutants, Chemical; Water Purification
PubMed: 33356799
DOI: 10.1080/21655979.2020.1863034