Studies on anticancerious and photocatalytic activity of carboxymethyl cellulose-cl-poly(lactic acid-co-itaconic acid)/ZnO-Ag nanocomposite
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In this paper, the microwave-assisted synthesis of carboxymethyl cellulose-cl-poly(lactic acid–co-itaconic acid)/ZnO-Ag nanocomposite [CMC-cl-p(LA-co-IA)/ZnO-Ag] has been discussed. Lactic acid (LA) and itaconic acid (IA) monomers were grafted onto carboxymethyl cellulose (CMC) using potassium persulphate and N, N'-methylene-bis-acrylamide (MBA) as initiator and crosslinker, respectively at optimized conditions of temperature and pressure. The nanocomposite was characterized using different techniques such as Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and energy dispersive X-ray (EDX). XRD, TEM and FTIR spectral analysis confirmed the formation of the nanocomposite. The release of amoxicillin drug-using nanocomposite as a function of pH and time has been investigated. The maximum drug release of 94.64% was pragmatic at pH 2.2 after 6 h. The degradation of congo red using nanocomposite followed the pseudo-first-order reaction model with the regression coefficient (R2) values of 0.99312. The nanocomposite was also explored for anticancer behavior against yeast cells.Keywords:
Itaconic acid
Carboxymethyl cellulose
Thermogravimetric analysis
Thermogravimetric analysis
Characterization
Thermogravimetry
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Itaconic acid
Methacrylonitrile
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Abstract Itaconic acid (methylenebutanedioic acid, methylenesuccinic acid) is a crystalline, high melting acid (mp = 167 – 168°C) produced commercially by fermentation of carbohydrates. Itaconic acid is produced in the broth form citric acid. Itaconic acid is isomeric with citraconic and mesaconic acids. Under acidic, neutral, or mildly basic conditions and at moderate temperatures, itaconic acid is stable. At elevated temperatures or under strongly basic conditions, the isomers are interconvertible. Itaconic acid, anhydride, and mono‐ and diesters undergo vinyl polymerization. Emulsion stability, flow properties of the formulated coating, and adhesion to substrates are improved in certain polymeric coatings by the acid.
Itaconic acid
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Itaconic acid is a type of unsaturatecd dioic acid.The chemical character of itaconic acid is very active because it's molecular contains two carboxyls and a dipl-bond.Therefore,itaconic acid is widely applied to chemical industry.The character,production methods of itaconic acid and the application of some derivatives of itaconic acid are introduced in this paper.
Itaconic acid
Chemical industry
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In this paper, thermogravimetric analysis of different types/grades of polyvinyl chloride (PVC) wall panel is carried out using thermogravimetric analyzer. The data output from the analyzer is subjected to data analysis software i.e., OriginPro 2018, from which thermal attributes are find out for different grades of PVC wall panel i.e., soft PVC, hard PVC, WPVC and SPVC. The thermogravimetric attributes i.e., onset degradation temperature T i , final degradation temperature T f ,, reaction interval and the peak temperature T P from the derivative thermogravimetric curve for the four basic types of PVC were comparatively analyzed for the characterization purpose. Beside the thermal characterization, the thermogravimetric analysis also disclosed the compositional attributes of the four types of PVC wall panel. The analysis in this paper characterized the SPVC as the most thermally stable PVC wall panel followed by hard, soft and WPVC.
Thermogravimetric analysis
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Itaconic acid $(C_5 H_6 O_4)$ is an organic acid with unique structure and characteristics. In order to promote the bio-based economy, the US-Department of Energy (DOE) assigned a "top-12" of platform chemicals, which include numerous of organic acids. In particular di-carboxylic acids, like itaconic acid, can be used as monomers for bio-polymers. Thus the need to produce itaconic acid attracts much attention. The favored production process is fermentation of carbohydrates by fungi and Aspergillus terreus is the mostly frequently employed commercial producer of itaconic acid. This review reports the current status of use of microorganisms in enhancing productivity.
Itaconic acid
Aspergillus terreus
Organic acid
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Thermogravimetric and derivative thermogravimetric curves of some complexes [Ni(S2CNHR)2] (R=Me, Et, Pri, Bui, But, Bz,p-MePh,p-MeOPh,p-ClPh,p-NO2Ph) in a dynamic nitrogen atmosphere were studied to determine their modes of decomposition. All these complexes show similar TG profiles. The weight losses in the main decomposition stages indicate conversion of the nickel(II) dithiocarbamates to sulphide. Reaction orders were estimated via the shape characteristics of the corresponding derivative thermogravimetric curves and kinetic analysis of the thermogravimetric data was performed by using the Coats-Redfern and Horowitz-Metzger methods.
Thermogravimetric analysis
Derivative (finance)
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The general situations of itaconic acid production by fermentation both at home and abroad were overviewed. Besides, the products of itaconic acid and its derivatives for industrial applications were introduced in detail.
Itaconic acid
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The application of itaconic acid copolymers covers various fields, including solvents, coatings, and binders. Itaconate is secreted into the fermentation broth. These findings might give rise to more advanced metabolic engineering strategies in the future, though they do not yet offer an advantage over the conventional pathway. Citrate can be efficiently converted into itaconate with two additional biochemical steps. From an industrial point of view, the fermentation technology for itaconic acid with A. terreus is established and can be regarded as rather mature. Itaconic acid was first produced by Pfizer in 1945, followed by Iwata Chemicals in 1970, Rhodia in 1995, and Cargill in 1996. For comparison, the report of the US Department of Energy assumed in 2004 that the fermentative product needs to achieve a cost position of about 0.55 US$ per kg, which is hardly possible if the maximum molar yield is taken into consideration.
Itaconic acid
Metabolic Engineering
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The character,production methods of itaconic acid and the application of some derivatives of itaconic acid are introduced in this paper.The technological process of producing itaconic acid by fermemtation and the application of derivatives of itaconic acid in manufacturing the agent of removing stink,carbon fibre et al are mainly introduced.
Itaconic acid
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