Log in

Relevant bibliographies by topics / Colourimetric Determination / Journal articles

To see the other types of publications on this topic, follow the link: Colourimetric Determination.

Journal articles on the topic 'Colourimetric Determination'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Colourimetric Determination.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

R., BAJAJ, NANGIA H., and L. JAIN C. "Colourimetric Determination of Isoniazid in Formulations by Complexation with Nickel(II) and Copper(II) Picrates." Journal of Indian Chemical Society Vol. 68, Sep 1991 (1991): 534–35. https://doi.org/10.5281/zenodo.6155202.

Full text

Abstract:

Department of Chemistry, M. M. H. College, Ghaziabad-201 001 <em>Manuscript received 4 September 1990, revised 5 July 1991, accepted 3 September 1991</em> Colourimetric Determination of Isoniazid in Formulations by Complexation with Nickel(II) and Copper(II) Picrates.  

APA, Harvard, Vancouver, ISO, and other styles

2

Haider, Syed Razi. "Colourimetric Determination of Phospholipase Activities in Balamuthia mandrillaris." American Journal of Biochemistry and Biotechnology 3, no. 3 (2007): 171–79. http://dx.doi.org/10.3844/ajbbsp.2007.171.179.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Rodrigues, Carlos J. C., João M. Sanches, and Carla C. C. R. de Carvalho. "Determining transaminase activity in bacterial libraries by time-lapse imaging." Chemical Communications 55, no. 90 (2019): 13538–41. http://dx.doi.org/10.1039/c9cc07507k.

Full text

Abstract:

Transaminase activity was determined by time-lapse imaging using a colourimetric reaction and image analysis. The correlation between substrate concentration and luminance allows the screening of biocatalysts and determination of kinetic parameters.

APA, Harvard, Vancouver, ISO, and other styles

4

Korany, M. A., Mona M. Bedair, M. A. Elsayed, and Ossama T. Fahmy. "Colourimetric Determination of Pharmaceutical Thiocompounds and Allopurinol Using Mercurochrome." Analytical Letters 22, no. 8 (1989): 1909–25. http://dx.doi.org/10.1080/00032718908051222.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Salem, Hesham, and Hassan Askal. "Colourimetric and AAS determination of cephalosporins using Reineck's salt." Journal of Pharmaceutical and Biomedical Analysis 29, no. 1-2 (2002): 347–54. http://dx.doi.org/10.1016/s0731-7085(02)00040-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

El-Olemy, M., M. Saleh, and N. Awad. "A New Colourimetric Method for the Determination of Saponins." Planta Medica 56, no. 06 (1990): 553. http://dx.doi.org/10.1055/s-2006-961133.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

BARNES, A. R., and J. K. SUGDEN. "ChemInform Abstract: Comparison of Colourimetric Methods for Ammonia Determination." ChemInform 23, no. 7 (2010): no. http://dx.doi.org/10.1002/chin.199207284.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

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.

Full text

Abstract:

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 quantitatively extracted under the experimental conditio

APA, Harvard, Vancouver, ISO, and other styles

9

Hewala, Ismail I. "First Derivative Spectrophotometric and Colourimetric Determination of Non-Steroidal Antiestrogens." Analytical Letters 26, no. 4 (1993): 625–40. http://dx.doi.org/10.1080/00032719308017396.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Salem, Hesham. "Colourimetric and atomic absorption spectrometric determination of some f luoroquinolone derivatives." Scientia Pharmaceutica 72, no. 1 (2004): 51–71. http://dx.doi.org/10.3797/scipharm.aut-04-06.

Full text

Abstract:

Three simple, accurate, sensitive and selective procedures for the determination of ten fluoroquinolones (amifloxacin, ciprofloxacin hydrochloride, difloxacin hydrochloride, enoxacin, enrofloxacin, lomefloxacin hydrochloride, lovefloxacin, norfloxacin, ofloxacin and pefloxacin mesylate) were described. Procedures I and II are based on the formation of ion-pair complexes between the drugs and ammonium reineckate reagent in an acidic medium at 25 ±2°C and the formed precipitates are quantitatively determined either colourimetrically (procedure I) or by atomic absorption spectrometrically (proced

APA, Harvard, Vancouver, ISO, and other styles

11

Al-Khamees, H. A. "Colourimetric Determination of Norfloxacin in Tablets By Reaction with p-Benzoquinone." Analytical Letters 28, no. 1 (1995): 109–20. http://dx.doi.org/10.1080/00032719508006021.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Saadati, M. "A simple method for colourimetric determination of silver using a home-made double beam photometer." South African Journal of Chemistry 77 (2023): 19–23. http://dx.doi.org/10.17159/0379-4350/2023/v77a03.

Full text

Abstract:

The present study proposes a simple and inexpensive photometric method for the selective determination of Ag(I). This method employed a home-made double beam photometer for the determination of silver ions based on an optode sensor prepared by immobilization of 5-(P-Dimethylaminobenzylidene)-rhodanine (PDR) on triacetyl cellulose (TAC) membrane. Two green LEDs as sources of light and light-dependent resistors (LDRs) as detectors were used in the proposed device. The LEDs are turned on by a programmable microcontroller that receives signals from light passed through the sensor, and the absorban

APA, Harvard, Vancouver, ISO, and other styles

13

Kolar, Jana, Matija Strlič, and Boris Pihlar. "New colourimetric method for determination of hydroxyl radicals during ageing of cellulose." Analytica Chimica Acta 431, no. 2 (2001): 313–19. http://dx.doi.org/10.1016/s0003-2670(00)01322-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Zerbinati, Nicola, Torello Lotti, Damiano Monticelli, et al. "In Vitro Evaluation of the Sensitivity of a Hyaluronic Acid PEG Cross-Linked to Bovine Testes Hyaluronidase." Open Access Macedonian Journal of Medical Sciences 6, no. 1 (2018): 20–24. http://dx.doi.org/10.3889/oamjms.2018.046.

Full text

Abstract:

Neauvia Intense is biocompatible, injectable hyaluronic acid (HA) filler PEG cross-linked for facial soft-tissue augmentation that provides volume to tissues. The aim of the present study is to evaluate the sensitivity of Neauvia Intense in hyaluronidase from bovine testes in a time-course analysis. The test is based on the colourimetric determination of the N-acetyl – D - glucosamine (NAG) released by the hyaluronidase in standardised conditions. The in vitro conditions involve the treatment of Neauvia Intense with a known concentration of the enzyme (6080U/ml). The NAG content was determined

APA, Harvard, Vancouver, ISO, and other styles

15

Awad, Atheer, Lucía Rodríguez-Pombo, Paula Esteiro Simón, et al. "Smartphone Biosensors for Non-Invasive Drug Monitoring in Saliva." Biosensors 15, no. 3 (2025): 163. https://doi.org/10.3390/bios15030163.

Full text

Abstract:

In recent years, biosensors have emerged as a promising solution for therapeutic drug monitoring (TDM), offering automated systems for rapid chemical analyses with minimal pre-treatment requirements. The use of saliva as a biological sample matrix offers distinct advantages, including non-invasiveness, cost-effectiveness, and reduced susceptibility to fluid intake fluctuations compared to alternative methods. The aim of this study was to explore and compare two types of low-cost biosensors, namely, the colourimetric and electrochemical methodologies, for quantifying paracetamol (acetaminophen)

APA, Harvard, Vancouver, ISO, and other styles

16

Kirkwood, Jobie, Julie Wilson, Simon O'Keefe, and David Hargreaves. "A high-throughput colourimetric method for the determination of pH in crystallization screens." Acta Crystallographica Section D Biological Crystallography 70, no. 9 (2014): 2367–75. http://dx.doi.org/10.1107/s1399004714014011.

Full text

Abstract:

The crystallization of proteins is dependent on the careful control of numerous parameters, one of these being pH. The pH of crystallization is generally reported as that of the buffer; however, the true pH has been found to be as many as four pH units away. Measurement of pH with a meter is time-consuming and requires the reformatting of the crystallization solution. To overcome this, a high-throughput method for pH determination of buffered solutions has been developed with results comparable to those of a pH meter.

APA, Harvard, Vancouver, ISO, and other styles

17

Delaplace, G., L. Bouvier, A. Moreau, R. Gu�rin, and J.-C. Leuliet. "Determination of mixing time by colourimetric diagnosis?Application to a new mixing system." Experiments in Fluids 36, no. 3 (2004): 437–43. http://dx.doi.org/10.1007/s00348-003-0741-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Escobedo, Pablo, de Vargas Sansalvador Isabel M. Perez, Rodríguez Miguel Angel Carvajal, Vallvey Luis Fermin Capitan, Alberto J. Palma, and Olmos Antonio Martinez. "Flexible passive tag based on light energy harvesting for gas threshold determination in sealed environments." Sensors and Actuators B: Chemical 236 (November 29, 2016): 226–32. https://doi.org/10.1016/j.snb.2016.05.158.

Full text

Abstract:

In this work we describe a passive screen printed flexible tag for gas monitoring that can be used in sealed environments. The developed measurement system is based on chemical sensors that are sensitive to gases concentration presenting optical response, luminescent or colourimetric. The measuring electronics consist of a LED for optical excitation of the sensing membrane and a high resolution digital colour detector for the reading of the optical signal. A microcontroller receives and processes the data enabling the detection threshold for the corresponding

APA, Harvard, Vancouver, ISO, and other styles

19

Balbino, Sandra, Dragutin Vincek, Iva Trtanj, et al. "Assessment of Pumpkin Seed Oil Adulteration Supported by Multivariate Analysis: Comparison of GC-MS, Colourimetry and NIR Spectroscopy Data." Foods 11, no. 6 (2022): 835. http://dx.doi.org/10.3390/foods11060835.

Full text

Abstract:

Because of its high market value, pumpkin seed oil is occasionally adulterated by cheaper refined oils, usually sunflower oil. The standard method for detecting its authenticity is based on expensive and laborious determination of the sterol composition. Therefore, the objective of this study was to determine the sterol content and authenticity of retail oils labelled as pumpkin seed oil and also to investigate the potential of near-infrared spectroscopy (NIR) and colourimetry in detecting adulteration. The results show that due to the significant decrease in Δ7-sterols and increase in Δ5-ster

APA, Harvard, Vancouver, ISO, and other styles

20

Lima, JoséL F. C., Cristina Delerue-Matos, and M. Carmo V. F. Vaz. "Automation of iron and copper determination in milks using FIA systems and colourimetric detection." Food Chemistry 62, no. 1 (1998): 117–21. http://dx.doi.org/10.1016/s0308-8146(97)00155-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Morais, Camilo L. M., Kássio M. G. Lima, and Francis L. Martin. "Colourimetric Determination of High-Density Lipoprotein (HDL) Cholesterol Using Red–Green–Blue Digital Colour Imaging." Analytical Letters 51, no. 18 (2018): 2860–67. http://dx.doi.org/10.1080/00032719.2018.1453833.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Zageer, Dheaa, Russel Altahan, Evon Akram, Khalid Zainulabdeen, and Emad Yousif. "Innovative Colorimetric Methods for Rapid Detection of Toxic Heavy Metals." IOP Conference Series: Earth and Environmental Science 1507, no. 1 (2025): 012031. https://doi.org/10.1088/1755-1315/1507/1/012031.

Full text

Abstract:

Abstract Detecting toxic heavy metals, such as lead, mercury, and cadmium, has become a pressing concern in the environmental and food industries because of their detrimental impact on human well-being. The study outlines an experimental method for detecting heavy metals, specifically mercury (Hg), cadmium (Cd), and lead (Pb), using colourimetric techniques. Materials such as HgCl2, Cd(NO3)2, Pb(NO3)2, and dithiazole, along with various laboratory instruments, were utilized. For mercury detection, a standard mercury (II) stock solution was prepared, which formed an orange complex with dithizon

APA, Harvard, Vancouver, ISO, and other styles

23

Nikolaychuk, Pavel Anatolyevich. "Spectrophotometric determination of L-α-glycerylphosphorylcholine in pharmaceutical formulations and industrial equipment cleaning rinse water with the WAKO Phospholipids C assay kit". PeerJ Analytical Chemistry 5 (2 червня 2023): e24. http://dx.doi.org/10.7717/peerj-achem.24.

Full text

Abstract:

A simple spectrophotometric method for the determination of L-α-glycerylphosphorylcholine in pharmaceutical formulations and industrial equipment cleaning rinse water using the enzyme glycerophosphocholine phosphodiesterase and the WAKO Phospholipids C assay kit was proposed. The method is based on the enzymatic hydrolysis of α-GPC to choline by glycerophosphocholine phosphodiesterase, the reaction of choline with the components of the assay kit, and the colourimetric determination of the formed product. The calibration graph is linear in the range from 1 to 40 mg/l of α-GPC, the molar attenua

APA, Harvard, Vancouver, ISO, and other styles

24

Thakur, M., A. K. Bhargava, and C. S. Pundir. "Determination of Urinary Oxalate with Arylamine Glass-Bound Sorghum Oxalate Oxidase and Horseradish Peroxidase." International Journal of Applied Sciences and Biotechnology 4, no. 3 (2016): 346–51. http://dx.doi.org/10.3126/ijasbt.v4i3.15768.

Full text

Abstract:

We describe an enzymic colourimetric method for determination of oxalate level in urine using arylamine glass-bound sorghum leaf oxalate oxidase and horseradish peroxidase. The method is based on quantification of H2O2 generated from oxidation of urinary oxalate by immobilized oxalate oxidase, by a colour reaction consisting of 4-aminophnazone, phenol and immobilized peroxidase as chromogen. Minimum detection limit of the method was 0.05 mmol/l. Analytical recovery of added oxalate in urine was 96.8± 3.0% (mean ±S.D.). Within and between day coefficient of variation (CV) for urinary oxalate in

APA, Harvard, Vancouver, ISO, and other styles

25

Kolesnikova, O. N., V. E. Tregubova, O. B. Ustinnikova, and A. A. Movsesyants. "Comparability assessment of the results of thiomersal quantification in adsorbed immunobiological medicinal products by colourimetry and by cold vapor atomic absorption spectrometry." Biological Products. Prevention, Diagnosis, Treatment 22, no. 3 (2022): 318–30. http://dx.doi.org/10.30895/2221-996x-2022-22-3-318-330.

Full text

Abstract:

To ensure the quality of immunobiologicals, it is required to quantify the thiomersal preservative present in a number of them. The authors have previously developed an analytical procedure for thiomersal quantification in non-adsorbed immunobiological medicinal products, which is based on cold vapor atomic absorption spectrometry (CV AAS). The aim of the study was to analyse the possibility of using the CV AAS procedure for thiomersal content determination in adsorbed immunobiologicals and evaluate the comparability of thiomersal quantification results obtained by colourimetry and CV AAS. Mat

APA, Harvard, Vancouver, ISO, and other styles

26

Syahputra, Hafid. "Phytochemical Screening and Determination of Phenolic and Flavonoid Contents in Ethanol Extract of Phyllanthus emblica L. Fruit." Indonesian Journal of Pharmaceutical and Clinical Research 7, no. 2 (2024): 70–77. https://doi.org/10.32734/idjpcr.v7i2.18235.

Full text

Abstract:

Phyllanthus emblica L. fruit is known for its potent antioxidant activity, closely associated with its phenolic and flavonoid content. This study aims to analyse the secondary metabolite composition and determine the total phenol and flavonoid levels in Phyllanthus emblica fruit. The extraction process was carried out using the maceration method with 96% ethanol as the solvent, followed by a rotary evaporator evaporation. The ethanol extract was subjected to phytochemical screening with colour reagents, and the total phenol and flavonoid contents were assessed using a colourimetric method. The

APA, Harvard, Vancouver, ISO, and other styles

27

Filik, Hayati, Duygu Aksu, Derya Giray, and Reşat Apak. "Colourimetric solid-phase extraction coupled with fibre optic reflectance spectroscopy for determination of ascorbic acid in pharmaceutical formulations." Drug Testing and Analysis 4, no. 6 (2011): 493–99. http://dx.doi.org/10.1002/dta.267.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Gyarmati, B., N. Hegyesi, B. Pukanszky, and A. Szilagyi. "A colourimetric method for the determination of the degree of chemical cross-linking in aspartic acid-based polymer gels." Express Polymer Letters 9, no. 2 (2015): 154–64. http://dx.doi.org/10.3144/expresspolymlett.2015.16.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Nuralifah, Yamin, D. R. Halidi, M. Arba, and W. O. S. Zubaydah. "Determination of total phenolic and flavonoid content of Ghontoghe (Kleinhovia hospita L.) leaves: in vitro antioxidant study." Food Research 6, no. 6 (2022): 267–72. http://dx.doi.org/10.26656/fr.2017.6(6).440.

Full text

Abstract:

The Ghontohge plant (Kleinhovia hospita L.) has been used as a traditional medicine to treat scurvy, lice, eye pain, jaundice and hepatitis, cholesterol, diabetes, hypertension and treat pneumonia. Therefore, it is possible that plants can be used as antioxidants and redox signalling sourced from natural materials. The purpose of this study was to investigate the antioxidant potential and evaluate the total phenolic and flavonoid content of Ghontoghe leaves and investigate the most potent fraction as an antioxidant from the extract and fractions of Ghontoghe leaves. Ghontoghe leaf powder was e

APA, Harvard, Vancouver, ISO, and other styles

30

Bernier, Jean-Luc T., Andrée F. Maheux, Maurice Boissinot, et al. "Onsite Microbiological Quality Monitoring of Raw Source Water in Cree Community of Mistissini." Water Quality Research Journal 44, no. 4 (2009): 345–54. http://dx.doi.org/10.2166/wqrj.2009.035.

Full text

Abstract:

Abstract Access to safe drinking water is a major concern for Canada's First Nations. The main objective of this report was to evaluate the microbiological quality of raw source water used for drinking purposes by the Cree people of Mistissini (Province of Québec, Canada) during summer 2005. Twelve environmental sites and 24 portable water containers used for domestic water collection and storage were sampled and submitted to microbiological determination of total coliforms, Escherichia coli, and Enterococcus sp. using membrane filtration and colourimetric standard methods. The results suggest

APA, Harvard, Vancouver, ISO, and other styles

31

Bennett, William W., Peter R. Teasdale, David T. Welsh, et al. "Inorganic arsenic and iron(II) distributions in sediment porewaters investigated by a combined DGT–colourimetric DET technique." Environmental Chemistry 9, no. 1 (2012): 31. http://dx.doi.org/10.1071/en11074.

Full text

Abstract:

Environmental contextContamination of aquatic ecosystems with inorganic arsenic is a concern for both environmental and human health. Sediments are an important sink for dissolved arsenic, but they may also act as a source of arsenic because of human-induced changes in aquatic systems. This paper describes a new approach for investigating the status of inorganic arsenic in sediments, based on recent developments in diffusion-based sediment sampling techniques. AbstractA new approach for investigating the biogeochemistry of inorganic arsenic and iron(II) in freshwater, estuarine and marine sedi

APA, Harvard, Vancouver, ISO, and other styles

32

Hassan, Sammer-ul, and Xunli Zhang. "Design and Fabrication of Capillary-Driven Flow Device for Point-Of-Care Diagnostics." Biosensors 10, no. 4 (2020): 39. http://dx.doi.org/10.3390/bios10040039.

Full text

Abstract:

Point-of-care (POC) diagnostics enables the diagnosis and monitoring of patients from the clinic or their home. Ideally, POC devices should be compact, portable and operatable without the requirement of expertise or complex fluid mechanical controls. This paper showcases a chip-and-dip device, which works on the principle of capillary-driven flow microfluidics and allows analytes’ detection by multiple microchannels in a single microchip via smartphone imaging. The chip-and-dip device, fabricated with inexpensive materials, works by simply dipping the reagents-coated microchip consisting of mi

APA, Harvard, Vancouver, ISO, and other styles

33

Miedviedieva, Kateryna, Svitlana Vasyuk, and Olena Portna. "Development and validation of a new spectrophotometric method for the determination of gabapentin in capsules." ScienceRise: Pharmaceutical Science, no. 3(43) (June 30, 2023): 50–57. http://dx.doi.org/10.15587/2519-4852.2023.283270.

Full text

Abstract:

In Ukraine, there are about 100 thousand people with epilepsy. Gabapentin is an effective antiepileptic agent for oral use, presented in capsules of different dosages from different manufacturers. Therefore, the urgent task of pharmaceutical analysis today is the development of highly accurate, reliable, affordable and fast methods of quantitative determination. The aim of the work is to develop a spectrophotometric technique for the quantitative determination of gabapentin in capsules based on the reaction with diazole red 2J in compliance with the SPhU. Material and methods. As reagent and s

APA, Harvard, Vancouver, ISO, and other styles

34

Rachmadita, Fitri, Erryana Martati, Sharifah Nurul Akilah Syed Mohamad, and Siti Zaiton Mat So'ad. "Antimicrobial Study of Chloroform Fraction from the Leaves of Entada spiralis Ridl." Journal of Pharmacy 1, no. 1 (2021): 45–53. http://dx.doi.org/10.31436/jop.v1i1.33.

Full text

Abstract:

Introduction: Entada Spiralis Ridl., or locally identified as Sintok, contains flavonoid, saponin, tannin, and glycoside, compounds that have antifungal and antibacterial activities. This research aims to identify bioactive compounds and determine the antimicrobial activity from crude and fraction of E. spiralis extract. Methods: The crude extract was prepared by macerating the leaves with chloroform, and then proceeded to fraction it by vacuum liquid chromatography with Dichloromethane (DCM)/Hexane (Hex) (1/9) and Dichloromethane (DCM)/Methanol (MeOH) (9/1) solvent system. Disk Diffusion Test

APA, Harvard, Vancouver, ISO, and other styles

35

Foo, W. S., L. M. J. Soo, H. S. Tay, and P. P. F. Lee. "Determination of butyrates, a medicinal food to improve gut health – a chemical method using potassium triiodide." Food Research 9, no. 2 (2025): 69–85. https://doi.org/10.26656/fr.2017.9(2).314.

Full text

Abstract:

The use of food as medicine is important in both treating and preventing illnesses. “Guthealthy foods” are thus essential as they help sustain our gut with a wide variety of beneficial bacteria. Short-chain fatty acids, e.g., butyrates, are a major class of metabolites produced by our gut microbiome. They play an important but incompletely understood role in many human diseases. Currently, methods like the HPLC and GCMS are most commonly used for the detection of butyrates. These methods, although popular, require specialized instruments and skilled professionals with specialized training to o

APA, Harvard, Vancouver, ISO, and other styles

36

Jiang, Hui, Jianan Wang, Wencheng Mao, and Quansheng Chen. "Determination of aflatoxin B1 in wheat based on colourimetric sensor array technology: Optimization of sensor features and model parameters to improve the model generalization performance." Microchemical Journal 175 (April 2022): 107173. http://dx.doi.org/10.1016/j.microc.2022.107173.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Çekiç, Sema Demirci, Asli Neslihan Avan, Seda Uzunboy, and Reşat Apak. "A colourimetric sensor for the simultaneous determination of oxidative status and antioxidant activity on the same membrane: N,N-Dimethyl-p-phenylene diamine (DMPD) on Nafion." Analytica Chimica Acta 865 (March 2015): 60–70. http://dx.doi.org/10.1016/j.aca.2015.01.041.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Sebezhko, O. I., T. V. Konovalova, O. S. Korotkevich, et al. "Hereditary definiteness of aspartate aminotransferase level in Holstein cattle." Bulletin of NSAU (Novosibirsk State Agrarian University), no. 1 (April 11, 2023): 185–97. http://dx.doi.org/10.31677/2072-6724-2023-66-1-185-197.

Full text

Abstract:

Farm animals’ growth, development and realization of productive qualities are closely interrelated by enzymatic transformations of amino acids, proteins and other complex nitrogenous compounds. Aspartate aminotransferase (AsT) is involved in the metabolism of amino acids in the cycles of urea, tricarboxylic acids and gluconeogenesis. The level of AsT in the blood depends on many paratypical and genetic factors. The paper presents the results of a biochemical analysis of the AsT content in the blood serum of Holstein bulls aged 12-13 months, who are descendants of 4 breeding bulls. Blood sampli

APA, Harvard, Vancouver, ISO, and other styles

39

Rizki, Muhammad Ikhwan, Anna Khumaira Sari, Salsabila Fadiya Rahma, Satrio Wibowo Rahmatullah, and Hayatun Izma. "Antimicrobial Activity of Ethanol Extract of Sea Pandan Leaves (Pandanus odorifer) Against Staphylococcus aureus and Escherichia coli." JURNAL FARMASIMED (JFM) 7, no. 1 (2024): 7–14. http://dx.doi.org/10.35451/jfm.v7i1.2280.

Full text

Abstract:

Sea pandan (Pandanus odorifer) is used in traditional medicine in India. Sea pandan is efficacious in treating pain, parasites, digestive, liver, and cognitive disorders. Sea pandan is found in coastal areas in South Kalimantan. Sea pandan contains flavonoid compounds that have the potential to be antimicrobials. This study aimed to determine the antimicrobial activity of sea pandan leaf extract. The study began with sample preparation, which included washing the leaves, drying them using an oven, refining the particle size, extracting 70% ethanol, and evaporating the solvent until a thick ext

APA, Harvard, Vancouver, ISO, and other styles

40

George, C. Njoku, V. Alisigwe Chibuzo, C. Aririguzo Prisca, and U. Iloanusi David. "Determination of the Total Phenolic Contents of Essential Oil Obtained from Cymbopogon Citratus (Lemongrass) and Persea Americana Mill (Avocado Pear Seed) and its Bioactive Component Using Gc-Ms Analysis." International Journal of Innovative Science and Research Technology 7, no. 2 (2022): 127–38. https://doi.org/10.5281/zenodo.6251954.

Full text

Abstract:

Essential oils are a mixture of volatile lipophilic constituents, most commonly sourced from leaf, bark tissue of higher plants. The study investigated the total phenolic contents of essential oil obtained from Cymbopogon citratus (lemongrass) and Persea Americana mill (avocado pear seed) and its bioactive component. Methods: The essential oils of both plants were obtained using the Soxhlet extraction method. Total phenol compositions were assayed using standard colourimetric methods. Gas chromatography-mass spectrometry (GCMS) analysis was used to ascertain the presence of phytochemicals in t

APA, Harvard, Vancouver, ISO, and other styles

41

Sebezhko, O. I., T. V. Konovalova, O. S. Korotkevich, et al. "Interbreed differences in the cholesterol profile in cattle in Western Siberia." Bulletin of NSAU (Novosibirsk State Agrarian University), no. 2 (July 26, 2023): 237–50. http://dx.doi.org/10.31677/2072-6724-2023-67-2-237-250.

Full text

Abstract:

The authors studied the leading indicators of the cholesterol profile of high-density lipoproteins (HDL-C), low-density lipoproteins (LDL-C) and total cholesterol (TC) in Black-and-White, Red Steppe and Holstein breeds of the second or third lactation, bred in large livestock farms—complexes on the territory of Western Siberia. Metabolism and concentration of lipid complexes of cholesterol status play a cardinal role in the homeostasis of cellular metabolic processes. The critical role of serum lipoproteins in cholesterol metabolism is well recognised, as is their role as predictors of cardiov

APA, Harvard, Vancouver, ISO, and other styles

42

Samuel, Metuge, GILLIAN NKEUDEM ASOBA, Frida Bawak Tabe, Laura Senge Ngede, Rene Ning Teh, and Irene Ule Ngole Sumbele. "FORMULATION OF A SNAIL-PROTEIN RICH MAIZE BASE WEANING FOOD (NutriPACK)." Journal of Tertiary and Industrial Sciences (JTIS) 3, no. 2 (July, 2023) (2023): 122–34. https://doi.org/10.5281/zenodo.8216184.

Full text

Abstract:

The objective of this project was to formulate an enriched snail-protein-rich maize-based food from locally and readily available raw materials. Through an experimental design, dried snails, maize, soy beans and crayfish were transformed by grinding into flour and content mixed to homogeneity following proportions of (%w/w) 40:30:25:5, 43:33:20:4 and 20:55:20:5 of carbohydrate, protein soybeans, snails and crayfish respective, considering FAO/WHO standards for infant food formulations. Evaluation of the sensory properties by a trained sensory analysis panel was carried out on the final product

APA, Harvard, Vancouver, ISO, and other styles

43

P., PARIMOO. "Quantitative Determination of Metronidazoie in Drug Preparations by Indirect Acid - Base Titration Method." Journal of Indian Chemical Society Vol. 65, Feb 1988 (1988): 151–52. https://doi.org/10.5281/zenodo.6139884.

Full text

Abstract:

Department of Pharmacy, Birla Institute of Technology and Science, Pliant-898 031 Manuscript received 1 Tune 1987, revised 21 December 1987, accepted 80 December 1987 IN indirect acid - base method was employed for the  quantitative determination of metronidazole in pharmaceutical dosage forms and compared with the other methods.The samples assayed were found to contain not less than 97.80±0.12% of the drug and the technique is rapid and selective. Metronidazole (2-methy1-5-nitroimidazole-l-ethanol

APA, Harvard, Vancouver, ISO, and other styles

44

Abara, Ukeme Sambo, Imoh Etim Ibanga, Lucy Larrycarr Nwapi, et al. "The Impact of Delayed Separation of Plasma and Serum Sample on Glucose Parameter of Apparently Healthy Students of Federal School of Medical Laboratory Technology (Science), Jos, Nigeria." Journal of Advances in Medical and Pharmaceutical Sciences 25, no. 1 (2023): 23–30. http://dx.doi.org/10.9734/jamps/2023/v25i1595.

Full text

Abstract:

Background: Estimation of glucose is very important in clinical diagnosis of diabetes mellitus, hyperglycemia and hypoglycemia. The core aim of clinical laboratory service is to produce accurate, precise and reliable test results. The ability of laboratories to do this lies in the availability of well trained personnel, equipment, electricity etc. There has been a progressive increase in the prevalence of diabetes mellitus in Nigeria and the burden is expected to increase even further and the need for proper diagnosis cannot be overemphasized. Aim: In this study we have tried to evaluate

APA, Harvard, Vancouver, ISO, and other styles

45

Augustynowicz, Daniel, Marta Kinga Lemieszek, Jakub Władysław Strawa, Adrian Wiater, and Michał Tomczyk. "Phytochemical Profiling of Extracts from Rare Potentilla Species and Evaluation of Their Anticancer Potential." International Journal of Molecular Sciences 24, no. 5 (2023): 4836. http://dx.doi.org/10.3390/ijms24054836.

Full text

Abstract:

Despite the common use of Potentilla L. species (Rosaceae) as herbal medicines, a number of species still remain unexplored. Thus, the present study is a continuation of a study evaluating the phytochemical and biological profiles of aqueous acetone extracts from selected Potentilla species. Altogether, 10 aqueous acetone extracts were obtained from the aerial parts of P. aurea (PAU7), P. erecta (PER7), P. hyparctica (PHY7), P. megalantha (PME7), P. nepalensis (PNE7), P. pensylvanica (PPE7), P. pulcherrima (PPU7), P. rigoi (PRI7), and P. thuringiaca (PTH7), leaves of P. fruticosa (PFR7), as we

APA, Harvard, Vancouver, ISO, and other styles

46

Zaitsev, Serhii. "IMPROVEMENT OF METHODS FOR DETERMINING THE EFFECT OFELECTRICAL DISCHARGES ON THE DEGRADATION OF TURBINE OILS." TECHNICAL SCIENCES AND TECHNOLOGIES, no. 4(34) (2023): 147–62. http://dx.doi.org/10.25140/2411-5363-2023-4(34)-147-162.

Full text

Abstract:

The article is a publication of scientific and methodical character. Continuous improvement of methods for determining the impact of electric discharges on the degradation of turbine oils to further diagnose the condition of these turbine oils and develop measures to prevent such degradation or reduce its impact on the quality of turbine oils during their operation in oil-filled thermal and mechanical equipment of power plants; ensure, for example, the reliability of hydrogen-cooled turbinegenerators.Improving methods for determining the effect of electric discharges on the degradation of mode

APA, Harvard, Vancouver, ISO, and other styles

47

Ola, Pius Dore, Domonika Pransa Kothan, Suwari Suwari, Luther Kadang, and Dodi Darmakusuma. "The Potential for On-Site Determination of Mn(II) using Eco-Friendly Natural Tannins: A Cost-Effective and Sustainable Approach." Indonesian Journal of Chemical Research 12, no. 3 (2025): 198–205. https://doi.org/10.30598/ijcr.2025.12-ola.

Full text

Abstract:

This study exploited digital image colourimetry (DIC) with natural tannin as a reagent to determine Mn(II) in aqueous media. The calibration curve had a correlation coefficient of 0.995, indicating a strong dependence of absorbance on Mn(II) concentration. Although the spectrophotometry method with NaIO4 as a reagent showed better results, the DIC method remained within an acceptable range. Both methods showed insignificant difference in measurement average and variance. Common cations in natural water interfered with Mn(II) detection at a tolerance of less than 5% except for Fe(III), which ca

APA, Harvard, Vancouver, ISO, and other styles

48

Jain, Bharti, Rajeev Jain, Prashant Kumar Jaiswal, et al. "A Non-Instrumental Green Analytical Method Based on Surfactant-Assisted Dispersive Liquid–Liquid Microextraction–Thin-Layer Chromatography–Smartphone-Based Digital Image Colorimetry(SA-DLLME-TLC-SDIC) for Determining Favipiravir in Biological Samples." Molecules 28, no. 2 (2023): 529. http://dx.doi.org/10.3390/molecules28020529.

Full text

Abstract:

Favipiravir (FAV) has become a promising antiviral agent for the treatment of COVID-19. Herein, a green, fast, high-sample-throughput, non-instrumental, and affordable analytical method is proposed based on surfactant-assisted dispersive liquid–liquid microextraction (SA-DLLME) combined with thin-layer chromatography–digital image colourimetry (TLC-DIC) for determining favipiravir in biological and pharmaceutical samples. Triton X-100 and dichloromethane (DCM) were used as the disperser and extraction solvents, respectively. The extract obtained after DLLME procedure was spotted on a TLC plate

APA, Harvard, Vancouver, ISO, and other styles

49

Li, Yuan, Biplab Dutta, Qi Jie Yeow, Rob Clowes, Charlotte E. Boott, and Andrew Cooper. "High-throughput robotic colourimetric titrations using computer vision." Digital Discovery, 2025. https://doi.org/10.1039/d4dd00334a.

Full text

Abstract:

A high-throughput (HTE) H2O2 determination method was developed using a commercial liquid handling robot (Opentrons OT-2) and computer vision-based analysis. Chemical titration using potassium permanganate (KMnO4) was used to determine...

APA, Harvard, Vancouver, ISO, and other styles

50

Canbay, Erhan, Utkan Ceylan, Zeynep İlay Topçu, Zeynep Çelik Canbay, Özge Çakar, and Ebru Demirel Sezer. "Development of an Inhibition-Based Colorimetric Method For Glutathione Determination." Journal of Immunology and Clinical Microbiology, April 8, 2024. http://dx.doi.org/10.58854/jicm.1412375.

Full text

Abstract:

Aim: Glutathione (GSH, L-γ-glutamyl-L-cysteinyl-glycine), one of the major cellular antioxidants, is an important non-protein intracellular physiological antioxidant with sulphhydryl groups for detoxification of reactive oxygen species (ROS) in all living organisms. GSH deficiency has been shown to be associated with many human diseases, including cardiovascular, immune and ageing diseases, arthritis and diabetes. Therefore, the development of an accurate, reliable and sensitive method for the determination of GSH in biological fluids is essential for the understanding of GSH homeostasis in me

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!