Academic literature on the topic 'Coloured acidic'

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Journal articles on the topic "Coloured acidic"

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G., S. SADANA, S. KUNHIPURAYIL P., and T. SANE R. "A Simple Extractive Colourimetric Determination of Pyrocyclidine Hydrochloride from Pharmaceutical Preparation using Food Colours." Journal of Indian Chemical Society Vol. 63, Feb 1986 (1986): 238–40. https://doi.org/10.5281/zenodo.6253273.

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Department of Chemistry, G. N. Khalsa College, Matunga, Bombay-400 019 Department of Chemistry, Ramnarain Ruia College, Matunga, Bombay-400 019 <em>Manuscript received 26 February 1985, accepted 15 November 1985</em> A simple colorimetric method for the estimation of procychdine hydrochloride from its pharmaceutical formulations is described. The method is based on the formation of coloured complexes by the drug with reagents, like sunset yellow. Carmoisine-S and Fast Red-E in acidic medium The coloured ion-pair complexes formed are quantita&shy;tively extracted under the experimental conditio
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Sanghi, Rashmi, and Bani Bhattacharya. "Comparative Evaluation of Natural Polyelectrolytes Psyllium and Chitosan as Coagulant Aids for Decolourization of Dye Solutions." Water Quality Research Journal 40, no. 1 (2005): 97–101. http://dx.doi.org/10.2166/wqrj.2005.009.

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Abstract The aqueous solutions of three different highly coloured anionic dyes (reactive, acidic and direct dyes), commonly used in the dyeing process, were studied for decolourization by coagulation. For optimum results the variables studied with polyaluminium chloride (PAC) were pH, dosage and temperature. Coagulation efficiencies of natural polyelectrolytes such as psyllium and chitosan alone or as coagulant aids in conjunction with PAC were studied and compared. In conjunction with a minimal dose of PAC, chitosan and psyllium were found to be very effective for the decolourization of acidi
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Ibrahim, Amany M. A. "Charge transfer complexes of Schiff bases derived from 2-aminobenzothiazole with some acidic and nonacidic acceptors." Canadian Journal of Chemistry 71, no. 3 (1993): 318–24. http://dx.doi.org/10.1139/v93-047.

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When Schiff bases derived from 2-aminobenzothiazole were reacted with di- and trinitrobenzene derivatives as acidic and nonacidic acceptors in the ratio of 1:1, stable coloured charge transfer complexes (CTC's) were obtained. The structure and stoichiometry of the CTC's were studied by elemental analysis.as well as by electronic absorption and infrared and nuclear magnetic resonance spectra. The CTC's derived from nonacidic acceptors were stabilized via intermolecular π–π* and n–π* transitions while those derived from acidic acceptors were formed by intermolecular π–π* transitions and a proton
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Stiborová, Marie, Befekadu Asfaw, and Pavel Anzenbacher. "Ce(IV)-mediated formation of benzenediazonium ion from a non-aminoazo dye, 1-phenylazo-2-hydroxy-naphthalene (Sudan I) and its binding to DNA." Collection of Czechoslovak Chemical Communications 54, no. 7 (1989): 2021–26. http://dx.doi.org/10.1135/cccc19892021.

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Ce(IV) ions in acidic medium convert a carcinogenic non-aminoazo dye, 1-phenylazo-2-hydroxy-naphthalene (Sudan I) into an ultimate carcinogen, which binds to calf thymus DNA. The principal product of Sudan I oxidation by the Ce(IV) system is the benzenediazonium ion. A minor product is the dihydroxyderivative of Sudan I, 1-(4-hydroxyphenylazo)-2,6-dihydroxynaphthalene. Other minor coloured products (yellow and brown) were not identified. The principal product (the benzenediazonium ion) is responsible for the carcinogenicity of Sudan I, as it covalently binds to DNA. Ce(IV) ions in acidic mediu
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Suvardhan, K., S. Ramanaiah, K. Suresh Kumar, et al. "Spectrophotometric Determination of Chromium in Water, and Pharmaceutical Samples Using 1-Naphthol." E-Journal of Chemistry 2, no. 1 (2005): 6–14. http://dx.doi.org/10.1155/2005/140534.

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Facile and sensitive spectrophotometric methods for the determination of trace and ultra trace amounts of chromium (VI) are described. 4-aminoantipyrine (APP) reacts with 1-naphthol (NPL) in presence of oxidising agent potassium dichromate in acidic medium to produce red coloured product having λmaxof 485 nm. The molar absorptivity and Sandell's sensitivity were 2.07x104l mol-1cm-1and 0.00240 μg/cm2respectively. The colour is stable for more than 6 h. The system obeys Beer's law in the range, 2-18 μg for determination of chromium (VI). The detection limits of chromium (VI) is 0.048 μg mL-1. Th
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Ragnar, M., T. Eriksson, and T. Reitberger. "Detection of Radicals Generated by Strong Oxidants in Acidic Media." Holzforschung 53, no. 3 (1999): 285–91. http://dx.doi.org/10.1515/hf.1999.048.

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Summary A new method to study superoxide and hydroxyl radicals in aqueous solution in the pH range 1 to 6 is described and critically evaluated. The method primarily detects superoxide, which reacts with tetranitromethane (TNM) by reductive cleavage. The strongly coloured nitroform anion (ε350nm = 15000M−1 cm−1) formed, is easily measured in a spectrophotometer or in a stopped-flow equipment. Hydroxyl radicals are measured indirectly. In a first step the hydroxyl radical reacts with iso-propyl alcohol to give acetone and superoxide. The superoxide formed is then in a second step detected with
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Wathon, Muhammad Hizbul, Endang Susilowati, Sri Retno Dwi Ariani, and Latifah Sari. "Complexation and Colour Stability of Anthocyanins from the Extracts of Java Plum Fruits (Syzygium cumini) with Selected Metal Cations (Al3+, Fe3+, and Ca2+) at Various pHs." Science and Technology Indonesia 10, no. 1 (2025): 43–55. https://doi.org/10.26554/sti.2025.10.1.43-55.

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Anthocyanins are highly coloured polyphenols, a class of flavonoids, which are natural, non-toxic, and water-soluble compounds. Because of that, anthocyanins have been used in numerous applications, such as natural colorants for foods, beverages, and textiles. However, anthocyanins have some drawbacks regarding their stability towards temperature, pH, and light, leading to degradation. One method to improve anthocyanins’ stability can be achieved through a complexation reaction of anthocyanins with metal cations. Thus, this study aimed to investigate the stability and colour profiles of anthoc
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Câmara, José S., Monica Locatelli, Jorge A. M. Pereira, et al. "Behind the Scenes of Anthocyanins—From the Health Benefits to Potential Applications in Food, Pharmaceutical and Cosmetic Fields." Nutrients 14, no. 23 (2022): 5133. http://dx.doi.org/10.3390/nu14235133.

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Anthocyanins are widespread and biologically active water-soluble phenolic pigments responsible for a wide range of vivid colours, from red (acidic conditions) to purplish blue (basic conditions), present in fruits, vegetables, and coloured grains. The pigments’ stability and colours are influenced mainly by pH but also by structure, temperature, and light. The colour-stabilizing mechanisms of plants are determined by inter- and intramolecular co-pigmentation and metal complexation, driven by van der Waals, π–π stacking, hydrogen bonding, and metal-ligand interactions. This group of flavonoids
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Cejpek, K., and J. Velíšek. "Advances in Chemistry of Isothiocyanate-derived Colourants." Czech Journal of Food Sciences 27, Special Issue 1 (2009): S207—S210. http://dx.doi.org/10.17221/1092-cjfs.

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This study is focused on the reactions of isothiocyanates (ITCs) in the presence of amino compounds leading to coloured structures &lt;I&gt;via&lt;/I&gt; substituted 2-thiohydantoins. A series of complementary experiments has been done and appropriate reaction conditions and structural prerequisites have been defined. Low-molecular colourants isolated and characterised from the model systems can be sorted into three groups. Yellow to red diastereomeric dehydrodimers of 2-thiohydantoin derivatives that contain an acidic methylene group are formed in mixtures consisted of ITCs and amino acids wi
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(Miss), SWETA UPADHYAY, and K. GUPTA V. "Extractive Photometric Determination of Hydroxylamine." Journal of Indian Chemical Society Vol. 63, Aug 1986 (1986): 769–71. https://doi.org/10.5281/zenodo.6297694.

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Department of Chemistry, Ravishankar University, Raipur-492 010 <em>Manuscript received 25 March 1986, revised 21 July 1986, accepted 12 August 1986</em> An extractive spectrophotometric method is described for the determination of hydroxylamine. The colour reaction is based upon the well known diazotising and coupling reaction. Hydroxylamine is oxidised by iodine to nitrite, which diazotises with <em>p</em>-nitroaniline to form a diazonium salt, and then coupled with diphenylamine in acidic medium. The pink coloured chloroform extract dye has an absorption maxima at 540 nm. Beer&#39;s law is
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Dissertations / Theses on the topic "Coloured acidic"

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Sundqvist, Bror. "Colour changes and acid formation in wood during heating /." Luleå, 2004. http://epubl.luth.se/1402-1544/2004/10.

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Donetti, Manuela. "Postharvest biochemical and physiological characterisation of imported avocado fruit." Thesis, Cranfield University, 2011. http://dspace.lib.cranfield.ac.uk/handle/1826/7672.

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Difficulties in controlling and forecasting avocado fruit ripening and the highly perishable nature of the crop once harvested, are the major causes of concern for avocado traders. In particular, the simultaneous presence of many suppliers may account for increased fruit variability during ripening. Avocado is a climacteric fruit with consistent ethylene production after harvest which is also related to high perishability. However, the mechanisms regulating ethylene biosynthesis and mesocarp softening are not completely understood. In order to study such effects, avocado fruit from different g
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Daniels, James Alexander. "Analysis and identification of colour formers in terephthalate acid manufacture : implications for poly(ethylene terephthalate)." Thesis, Manchester Metropolitan University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266456.

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Tôrres, Adamastor Rodrigues. "Determinação da acidez total de vinhos tintos empregando titulações baseadas em imagens digitais." Universidade Federal da Paraí­ba, 2010. http://tede.biblioteca.ufpb.br:8080/handle/tede/7168.

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Made available in DSpace on 2015-05-14T13:21:45Z (GMT). No. of bitstreams: 1 parte1.pdf: 2505729 bytes, checksum: e872a92484e063cf1f264ba7b16d9e2e (MD5) Previous issue date: 2010-03-19<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>This work proposes the use of digital images captured by a Webcam for determination of total acidity in red wines by means of an acid-base titration without using an external indicator. Digital images present the colour of the emergent radiation, which is complementary to the radiation absorbed by molecules of anthocyanines present
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Paotrakool, Jiraporn. "Studies of de-acidification of pineapple juice and colour development of the recovered solution /." View thesis View thesis, 1994. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030612.140204/index.html.

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Thesis (M.Sc.) -- University of Western Sydney, Hawkesbury, 1994.<br>Thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Food Science, School of Food Sciences, Faculty of Science and Technology, University of Western Sydney, Hawkesbury, 1994. Includes bibliographical references.
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Paotrakool, Jiraporn. "Studies of de-acidification of pineapple juice and colour development of the recovered solution." Thesis, View thesis View thesis, 1994. http://handle.uws.edu.au:8081/1959.7/627.

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Pineapple juice of low acid content was prepared by removal of acids by using weakly basic anion exchange resin, IRA-93. The changes in the contents of titratable acid, pH and total soluble solids of model solutions that contained the principal constituents of pineapple juice (citric acid, citrate salt and sucrose) were investigated. The adsorption of individual acids and changes in composition of juice after a de-acidification process were explored. The adsorbed acids were recovered as solutions by some eluants, and studies on colour development in the recovered solutions carried out. The sol
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Chido, Chakanya. "Fatty acid composition, colour stability and lipid oxidation of mince produced from fresh and frozen/thawed fallow deer meat." Thesis, University of Fort Hare, 2016. http://hdl.handle.net/10353/2479.

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The aim of the study was to determine the fatty acid composition, colour stability and lipid oxidation of fresh mince produced from fallow deer and to evaluate the effect of frozen storage duration on the retail display shelf life of the mince. A total of 31 fallow deer carcasses were used in the study. After cooling for 24hrs, the carcasses were deboned, external fat from the fore and hindquarter muscles removed and individually vacuum packed. For the first trial, seven fallow deer carcasses were used. Meat from the hind and fore-quarters of each carcass was divided into two equal batches per
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Saeidi, Ghodratollah. "The effect of seed colour and linolenic acid concentration on germination, seed vigour, seed quality and agronomic characteristics of flax." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ27429.pdf.

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Liu, Xing, and s3072856@student rmit edu au. "Electrical Impedance Spectroscopy Applied in Plant Physiology Studies." RMIT University. Electrical and Computer Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080428.092529.

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Electrical Impedance Spectroscopy (EIS) is a relatively new method applied to food quality assessment. EIS allows relatively inexpensive assessment, is fast, easy to operate and non-invasive. It has been adopted for investigation of fundamental electrical properties of plant tissues. Although the applications of EIS for food quality determination have been reported previously, the analytical relationships between electrical impedance properties and quality criteria have not yet been fully developed. Further exploration is thus important in acquiring more data on electrical impedance characteri
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Tikk, Kaja. "The influence of feeding and aging on pork quality /." Uppsala : Dept. of Food Science, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200791.pdf.

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Books on the topic "Coloured acidic"

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Joint FAO/WHO Expert Committee on Food Additives. Specifications for identity and purity of certain food additives: Antioxidants, flavouring agents, food acids and salts, food colours, sweeteners, thickeners, and miscellaneous food additives ; 30th session of the Joint FAO/WHO Expert Committee on Food Additives, Rome, 2-11 June 1986. JECFA, 1986.

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Joint FAO/WHO Expert Committee on Food Additives. Specifications for identity and purity of certain food additives: Enzyme preparations and immobilizing agents, flavouring agents, flour treatment agents, food acids and salts, food colours, sweeteners, thickeners, and miscellaneous food additives : 29th session of the Joint FAO/WHO Expert Committee on Food Additives, Geneva, 3-12 June 1985. Food and Agriculture Organization of the United Nations, 1986.

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Maj, Dorota. Modyfikujący wpływ roślinnych dodatków paszowych na użytkowość mięsną i ekspresję wybranych genów u królików w zależności od wieku i płci. Publishing House of the University of Agriculture in Krakow, 2017. http://dx.doi.org/10.15576/978-83-66602-29-8.

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The aim of the study was to determine the effect of feed additives (algae, soybean, and sunflower oil) used in the rabbit feed on: growth indices and slaughter traits, pH, colour, texture, chemical composition, fatty acid profile and oxidative stability (TBARS) of the meat as well as FTO and FABP4 genes expression in the meat’s intramuscular fat (m. longissimus lumborum), depending on the age and sex. The experimental material consisted of Termond White rabbits (n = 160, 80 females and 80 males). Animals were weaned on the 35th day of life, and housed in metal cages arranged in batteries (4 ra
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Buitelaar, Jan K., Nanda Rommelse, Verena Ly, and Julia J. Rucklidge. Nutritional intervention for ADHD. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198739258.003.0040.

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This chapter discusses four dietary interventions (exclusion of artificial colours and preservatives; restrictive elimination diets/oligoantigenic diets; supplementation with omega-3 fatty acids; and supplementation with micronutrients) and their clinical relevance for ADHD. The evidence base for exclusion of artificial colours and preservatives has many gaps. Effectiveness of the elimination phase of elimination diets has been demonstrated in several randomized clinical trials and about one-third of the children with ADHD show an excellent response. Data on maintenance of effect in the longer
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Tarmann, Gerhard M. Zygaenid Moths of Australia. CSIRO Publishing, 2005. http://dx.doi.org/10.1071/9780643092198.

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The Zygaenidae are a family of day-flying moths with an unusual biology – they are capable of releasing prussic (hydrocyanic) acid. All Australian species belong to the subfamily Procridinae (commonly known as foresters) and many of these feature iridescent green colours or a wasp-like look. This is the first study of the Australian fauna of these attractive and biologically interesting moths.&#x0D; In this volume their beauty is captured larger-than-life in 114 finely detailed portraits by acclaimed artist František Gregor, setting a new benchmark for moth illustrations. Comprehensive general
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Zborowski, Paul, and Ted Edwards. Guide to Australian Moths. CSIRO Publishing, 2007. http://dx.doi.org/10.1071/9780643094642.

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Moths are often thought of as the ugly cousins of butterflies, yet their colours can be just as remarkable and, with over 20,000 species in Australia, their biology and lifestyles are far more diverse. &#x0D; With striking colour photographs of live moths in their natural habitat, this guide illustrates all the major moth families in Australia, including some rarely seen species. It provides many curious facts about the unusual aspects of moth biology, including details on day-flying species, camouflage, moths that mimic wasps, larvae with stinging hairs, and larvae that have gills. This easy-
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Peverill, KI, LA Sparrow, and DJ Reuter, eds. Soil Analysis: An Interpretation Manual. CSIRO Publishing, 1999. http://dx.doi.org/10.1071/9780643101357.

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Soil Analysis: An Interpretation Manual is a practical guide to soil tests. It considers what soil tests are, when they can be used reliably and consistently, and discusses what limits their application. It is the first nationally accepted publication that is appropriate for Australian soils and conditions.&#x0D; The first three chapters review the general principles and concepts of soil testing, factors affecting soil test interpretation and soil sampling and handling procedures. The next two chapters describe morphological indicators of soil and include colour plates of major Australian agri
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Book chapters on the topic "Coloured acidic"

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Kumar, Arun, Binay Kumar Agarwal, Rajesh Kumar, Sanjay J. Jambhulkar, Varsha Rani, and Zille Ali Haider. "Induction of variability for yield components in Indian mustard (Brassica juncea L. Czern & Coss) under acidic soil regime of Jharkhand." In Mutation breeding, genetic diversity and crop adaptation to climate change. CABI, 2021. http://dx.doi.org/10.1079/9781789249095.0026.

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Abstract Indian mustard (Brassica juncea L.) is the most important oilseed crop of the state of Jharkhand in India, where 78% of the cultivable soil is acidic, causing a sizeable yield reduction. Potential seed yield from such soils cannot be realized within existing varieties and therefore a mutation breeding approach has been followed to isolate mutants tolerant to acidic soil. Three doses of gamma-rays (900 Gy, 1000 Gy and 1100 Gy) and a combined treatment of gamma irradiation and 0.3% EMS were used for induction of mutation in the varieties 'Shivani' and 'Pusa Bold'. A total of 139,720 M<s
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Morgan, Lynette. "Greenhouse produce quality and assessment." In Hydroponics and protected cultivation: a practical guide. CABI, 2021. http://dx.doi.org/10.1079/9781789244830.0013.

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Abstract 'Quality' of greenhouse and hydroponic produce implies suitability for a particular purpose or the degree to which certain set standards are met. Aspects of produce quality may encompass sensory properties (appearance, texture, taste and aroma), nutritive values, chemical constituents, mechanical properties, functional properties and defects. Quality standards and testing methods have been developed for most commercial crops to help ensure consumers receive produce of a suitable standard. These quality standards can range from basic grading for removal of damaged produce and for size,
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Morgan, Lynette. "Greenhouse produce quality and assessment." In Hydroponics and protected cultivation: a practical guide. CABI, 2021. http://dx.doi.org/10.1079/9781789244830.0246.

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Abstract 'Quality' of greenhouse and hydroponic produce implies suitability for a particular purpose or the degree to which certain set standards are met. Aspects of produce quality may encompass sensory properties (appearance, texture, taste and aroma), nutritive values, chemical constituents, mechanical properties, functional properties and defects. Quality standards and testing methods have been developed for most commercial crops to help ensure consumers receive produce of a suitable standard. These quality standards can range from basic grading for removal of damaged produce and for size,
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Kumar, Ashok, Utkarsh Dixit, Kaman Singh, Satya Prakash Gupta, and Mirza S. Jamal Beg. "Structure and Properties of Dyes and Pigments." In Dyes and Pigments - Novel Applications and Waste Treatment. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97104.

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Colour is one of the elements of nature that makes human life more aesthetic and fascinating in the world. Plants, animals, and minerals have been used as primary sources for colourants, dyes or pigments since ancient times. In our daily life, we know about many substances which have specific colours. These are the substances which are used as colourants i.e.; colour imparting species. Both dyes and pigments are coloured as they absorb only some wavelength of visible light. Their structures have Aryl rings that have delocalized electron systems. These structures are said to be responsible for
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Emsley, John. "Malevolent arsenic." In The Elements of Murder. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780192805997.003.0012.

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We can never know who committed the first murder with arsenic or even who discovered the deadly nature of arsenical compounds. Although the natural arsenic minerals orpiment and realgar are poisonous, they are not particularly effective as murder weapons because they are insoluble and highly coloured, so that feeding them undetected to the intended victim would not be easy. The most reliable form in which to administer arsenic, knowing that it would succeed in killing someone, would have to be as the oxide. This is not a naturally occurring substance but it was easily obtained. When copper ore
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Sarkar, Mrittika, Anshika Sah, Payal Agarwal, Sai Joshi, and Sinchan Hait. "Quantification Tests for Carbohydrate Detection." In Practical Biochemistry. BENTHAM SCIENCE PUBLISHERS, 2024. http://dx.doi.org/10.2174/9789815165852124010006.

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Quantification of carbohydrates by the anthrone method is a colourimetric assay. In this method, first, the complex carbohydrates are hydrolysed in a highly acidic medium, resulting in monosaccharides. Thereafter, these monosaccharides are dehydrated to form 5-hydroxymethylfurfural (5-HMF) or 2-furfural (2-F), followed by reacting with anthrone reagent. This reaction produces a blue-green complex which is colourimetrically determined. In DNSA method 3,5-dinitrosalicylic acid (DNSA), a yellow colour reagent reacts with reducing sugar’s carbonyl group and forms orangered colour compound 3-Amino-
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"Dyeing." In Tanning Chemistry: The Science of Leather, 2nd ed. The Royal Society of Chemistry, 2019. http://dx.doi.org/10.1039/9781788012041-00434.

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Dyeing leather is an important process, because visual perception is the first experience that a customer or anyone else has of the material: the colour itself, the intensity and the uniformity. Traditionally, vegetable-tanned leather was coloured by natural products, which required the assistance of a mordant. The development of chromium(III) tanning followed the development of synthetic dyes, which offered deeper shades. Currently, the commonest class of dyes for leather is the 1 : 1 premetallised dyes, the equivalent of a strong colourant carrying its own mordant. Other classes of dyes are
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Clugston, Michael, Malcolm Stewart, and Fabrice Birembaut. "Acid–base Equilibrium." In Making the Transition to University Chemistry. Oxford University Press, 2021. http://dx.doi.org/10.1093/hesc/9780198757153.003.0007.

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This chapter explains the acid-base equilibrium. This involves the transfer of protons in line with the Brønsted–Lowry theory. A strong acid or strong base is fully ionized in an aqueous solution, while weak acids or bases are only partially ionized in an aqueous solution. Acid-base titrations measure the unknown concentration of one solution by reaction with another standard solution with a familiar concentration. The chapter also notes how indicators are typically water-soluble weak organic acids with varying colours at different pH values. It explores the alternative theory of acid-base rea
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Sarkar, Mrittika, Sinchan Hait, Sai Joshi, and Revati Supekar. "Quantitative Tests for Nucleic Acid Detection." In Practical Biochemistry. BENTHAM SCIENCE PUBLISHERS, 2024. http://dx.doi.org/10.2174/9789815165852124010015.

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Nucleic acid quantification is essential in experiments associated with genetic engineering. Over periods, several techniques have been developed to quantify nucleic acids. UV-Vis spectrophotometer is the simplest technique where it is associated with absorbance, which is proportional to the concentration of the sample. There are some colourimetric methods, such as the diphenylamine (DPA) method, and the orcinol method, where nucleic acid reacts with diphenylamine and forms a bright blue colour complex, and orcinol reacts and forms a green colour complex. Apart from that, some advanced techniq
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Hait, Sinchan. "Qualitative Tests for Protein Detection." In Practical Biochemistry. BENTHAM SCIENCE PUBLISHERS, 2024. http://dx.doi.org/10.2174/9789815165852124010008.

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Qualitative tests are the primary assays for detecting the presence of any protein in a given sample. Qualitative detection of proteins is based on the chemical interactions between amino acids and certain chemical reagents added to them. These chemical reactions yield colour formation, which corresponds to specific amino acid or a group of amino acids present in the sample. In this chapter, some of such most important assays for qualitative analysis are discussed in detail.
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Conference papers on the topic "Coloured acidic"

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Chirinos, G., S. Turgoose, and R. C. Newman. "Effects of Residual Elements on the Corrosion Resistance of Steels in HF." In CORROSION 1997. NACE International, 1997. https://doi.org/10.5006/c1997-97513.

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Abstract The effects of Cu, Ni and Cr alloying on HF corrosion were studied using special low-carbon alloys, and the results compared with two commercial steels that had shown different resistance in HF alkylation service. Three HF concentrations (60%, 90% and 98.4%) and two temperatures (room temperature and 90°C) were used. The electrochemical techniques were impedance spectroscopy, polarization curves and zero-resistance ammetiy of coupled electrodes. Long-term immersion tests in 60% HF were used to study the fluoride scales in cross-section. In deoxygenated 98.4% acid, the most notable res
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Visileanu, Emilia, Elena Perdum, Laurentiu Dinca, Adrian Salistean, Felicia Dondea, and Razvan Scarlat. "Advanced materials with infrared camouflage properties." In 15th International Conference on Applied Human Factors and Ergonomics (AHFE 2024). AHFE International, 2024. http://dx.doi.org/10.54941/ahfe1004910.

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Nowadays, textile materials with a protective role must ensure the body's defence against a multitude of threats and fulfil a variety of functional requirements. In particular, textile products intended for military applications require durability, resistance to ballistic threats and environmental conditions (eg, ultraviolet (UV) light, moisture, fire, heat and wind), comfort, etc. In addition, these materials must provide camouflage in various ambient conditions at a wide range of wavelengths in the electromagnetic spectrum such as the near-infrared (NIR) region (750–1200 nm) and far infrared
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Jodicke, K., S. Arendt, W. Hofacker, and W. Speckle. "Quality analysis of fresh and dried mangoes." In 21st International Drying Symposium. Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/ids2018.2018.7526.

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Organic acids, sugar and colour define the quality and the taste of mangoes. The quality deteriorates during drying on a single-layer-dryer. Quality losses can be reduced by using drying parameters that influence the quality less. In this research, the contents of ascorbic acid, organic acids and sugar as well as colour changes and shrinkage are analysed. Analyses are carried out at different temperatures, dew point temperatures and air velocities using HPLC, IC and UV/Vis- spectrometry. The quality criteria showed the lowest changes at a temperature of 60°C, dew point temperature of 20°C and
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Beyler Çiğil, Aslı, and Hatice Birtane. "DEVELOPMENT OF FILMS CONTAINING POLYLACTIC ACID/HALLOYSITE NANOTUBES IN BANANA ACTIVE PACKAGING." In INTERNATIONAL SYMPOSIUM ON GRAPHIC ENGINEERING AND DESIGN. UNIVERSITY OF NOVI SAD FACULTY OF TECHNICAL SCIENCES DEPARTMENT OF GRAPHIC ENGINEERING AND DESIGN 21000 Novi Sad, Trg Dositeja Obradovića 6, 2024. http://dx.doi.org/10.24867/grid-2024-p49.

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Ethylene plays a significant role in the ripening and aging processes of fruits and vegetables, ultimately reducing their shelf life. Consequently, the presence of ethylene can restrict the marketability and consumer accessibility of certain horticultural products, leading to heightened post-harvest losses and increased food waste. In this study, nanocomposite packaging films with ethylene scavenging activity, which will help preserve freshness during distribution, were developed and tested as packaging for fresh products. Nanocomposite packaging films were prepared by adding different amounts
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Diduk, Iryna, Yurii Chuvashov, Olga Yashchenko, Nataliya Koshelenko, and Ganna Grytsak. "Modification of basalt fibers to improve operational efficiency in aggressive environments." In IXth INTERNATIONAL SAMSONOV CONFERENCE “MATERIALS SCIENCE OF REFRACTORY COMPOUNDS”. Frantsevich Ukrainian Materials Research Society, 2024. http://dx.doi.org/10.62564/m4-id9285.

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The use of basalt fibre as a reinforcing element, including in cement-concrete compositions, is increasing. However, the surface layer of fibers is dissolved during long-term use in the cement matrix, which is associated with cement hydration. Increasing the corrosion resistance of basalt fibers can be achieved by modifying the fibers by heat treatment. The influence of the temperature and processing time of basalt fibers on the chemical stability of fibers in alkaline and acidic environments is studied. For the experiment, fibers with a surface area of 5000 cm2 were taken and kept in solution
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Nosratpour, Mitra, Jisheng Ma, Victoria Haritos, and Yong Wang. "The physicochemical and sensory characteristics of yoghurt fortified with encapsulated fish oil/milkfat." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/yhap5375.

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High DHA fish oil with ~40% long-chain polyunsaturated fatty acids is beneficial for health. Blending fish oil with milkfat with saturated fatty acids in a chilled environment into solid lipid particles (SLP) increases stability and reduces undesirable taste and odour. SLP can be mixed into dairy products to fortify them with long-chain omega-3 fatty acids. Here, SLPs of fish oil and milkfat with ratio of 50:50 and 70:30 ( w/w) of ~1 mm in diameter were mixed into plain Greek-style yoghurt at 1.2% (w/w). The crystalline structure of SLPs, potential fatty acid leakage, and other physicochemical
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Moldovan, Camelia, Corina Dana Misca, Viorica-Mirela Popa, Diana-Nicoleta Raba, and Delia Gabriela Dumbrava. "EVALUATION OF TOTAL POLYPHENOLS CONTENT AND ANTIOXIDANT ACTIVITY OF THE CHAMOMILE BEVERAGE WITH DIFFERENT SWEETENERS ADDING." In 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022v/6.2/s25.24.

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The aim of this paper was to evaluate the influence of some sweeteners adding on sensorial characteristics (appearance, consistency, colour, smell and taste), and some physico-chemical indicators (acidity, total soluble solids, total polyphenols content and antioxidant activity) of the chamomile soft drinks. The parameters were evaluated at 7 and 14 days respectively. These fermented soft drinks were obtained from chamomile flowers, bran, lemon juice and four types of sweeteners: white sugar, brown sugar, bee honey and Stevia rebaudiana dried leaves. The sensorial evaluation was by hedonic sca
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Mierzwa, Dominik, and Justyna Szadzińska. "Microwave assisted convective drying of kale (Brassica oleracea L. var. sabellica L.) at stationary and non-stationary conditions." In 21st International Drying Symposium. Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/ids2018.2018.7333.

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This paper concerns hybrid drying of kale. Eight different schedules of drying were tested experimentally to find out the influence of microwave enhancement on the kinetics (drying rate and time), energy consumption of convective drying and quality of products. Different power of microwaves and modes of microwave application were tested. Quality of products was assesed through water activity and colour measurements, as well as retention of ascorbic acid. The results obtained in the studies allowed to state that intermittent application of high-power microwave pulses may lead to a meaningful re
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Woon, H. S., K. Nicklaane, L. S. Ewe, K. P. Lim, I. Ismail, and C. Y. Tan. "Synthesis and characterization of inorganic colour pigment from spent acid." In 3RD INTERNATIONAL SCIENCES, TECHNOLOGY & ENGINEERING CONFERENCE (ISTEC) 2018 - MATERIAL CHEMISTRY. Author(s), 2018. http://dx.doi.org/10.1063/1.5066986.

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Mir, M. Amin, M. Waqar Ashraf, Nidal Abu-Libdeh, Kim Andrews, and Nupur Kukretee. "Colour pigment from plants - Anthocyanin as an acid base indicator." In FOURTH INTERNATIONAL CONFERENCE ON ADVANCES IN PHYSICAL SCIENCES AND MATERIALS: ICAPSM 2023. AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0216055.

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Reports on the topic "Coloured acidic"

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Jinawath, Supatra. Development of products from Mae Moh flue-gas gypsum. Chulalongkorn University, 1999. https://doi.org/10.58837/chula.res.1999.34.

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The flue-gas desulfurization gypsum (FGD gypsum) from Mae Moh power station is characterized for its physical and chemical properties, precleaned by acid leaching and sedimentation to light coloured powder which is later used, in later used, in comparison with natural gypsum, as raw material for the syntheses of [beta]-hemihydrate, anhydrites and multiphase plasters. Based on the commercial specification, these gypsum plasters are fabricated into product, i.e. gypsum board and projection plaster slurry. With the employment of gypsum technology, the product performance can be engineered to matc
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สุขในศิลป์, สุทธิศักดิ์, สุวรรณา สุภิมารส, กัลยา เลาหสงคราม, สายวรุฬ ชัยวานิชศิริ та รมณี สงวนดีกุล. การพัฒนาผลิตภัณฑ์นมแพะสู่ชุมชน : การศึกษาสมบัติพื้นฐานทางด้านเคมี กายภาพ และจุลชีววิทยา ของน้ำนมแพะจากแหล่งต่างๆ : รายงานการวิจัยฉบับสมบูรณ์. จุฬาลงกรณ์มหาวิทยาลัย, 2007. https://doi.org/10.58837/chula.res.2007.49.

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แพะเป็นสัตว์ที่เลี้ยงง่าย ใช้พื้นที่ในการเลี้ยงน้อย ขยายพันธุ์ได้รวดเร็ว ทำให้ต้นทุนการเลี้ยงต่ำ และยังได้รับการส่งเสริมจากภาครัฐ จึงได้รับความสนใจจากเกษตรกรในการเลี้ยงเพิ่มขึ้น โดยเฉพาะการเลี้ยงเพื่อรีดน้ำนม และนำน้ำนมแพะมาแปรรูปเป็นผลิตภัณฑ์ต่าง ๆ แต่เนื่องจากชุมชนยังขาดข้อมูลพื้นฐานเกี่ยวกับน้ำนมแพะ และขาดความรู้ในการแปรรูป ทำให้ผลิตภัณฑ์ที่ผลิตได้มีคุณภาพไม่ได้มาตรฐาน จึงทำให้ผลิตภัณฑ์นมแพะของชุมชนยังไม่ประสบความสำเร็จ โดยเฉพาะการพัฒนาผลิตภัณฑ์ให้มีความหลายหลายและเหมาะสม ทั้งๆ ที่น้ำนมแพะมีคุณค่าทางโภชนาการที่ดี และร่างกายสามารถดูดซึมไปใช้ประโยชน์ได้ง่ายและรวดเร็ว งานวิจัยนี้มีวัตถุประสงค์
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