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56 articles for “Quantification”
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Commercial Scale Quantification of Lignin
Abstract: Lignin, an aromatic biopolymer, in the terrestrial lignocellulosic biomass constitutes the single largest and sustainable source of biofuels and biochemicals. The recalcitrant nature of lignin is a hindrance to its chemical or biochemical conversion. Moreover, its insolubility in water too is a major challenge in its quantification which is a necessary step prior to and after its conversion. Though there are celebrated quantification methods like the classical Klason lignin method …
Published in International Journal of Environmental Chemistry · Vol. 11, Issue 2, 2025 · pp. 20–25 Read article
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Quantification of Morphine, Codeine, and Dihydrocodeine in Carissa carandas Leaves and Fruit Using LC-MS/MS: The Impact of Drying on Alkaloid Concentration
Abstract: This study presents a method for quantifying morphine, codeine, and dihydrocodeine in Carissa carandas (Karonda) leaves and fruit, employing morphine-D3 as an internal standard (1 µg/mL) to ensure accuracy. Samples are prepared at 25 ng/mL and extracted using solvent techniques, with an optional solid-phase extraction step to mitigate matrix effects. Quantification is conducted via LC-MS/MS, providing robust sensitivity. Results show that drying concentrates these alkaloids, particularly morphine in fruit, due …
Published in International Journal of Environmental Chemistry · Vol. 11, Issue 1, 2025 · pp. 49–61 Read article
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Quantification of Chemical Components and Phytochemical Screening of GaliumVerum by HPLC and LC-MS Analysis
Abstract: Galium verum L. – yellow "Lady's bedstraw" – contains polyphenols, flavonoids, phenyl- propanoids compounds, and iridoids in its golden yellow blossoms. The chemical makeup of the volatile fraction of Galiumverum L. was analysed.This plant is from the natural flora of Moldova (RediuIasi region, Romania) as a source of polyphenols and flavonoids.The purpose of this investigation is to investigate the composition of the herb methanol extract of Lady's bedstraw (Galium verum …
Published in International Journal of Agrochemistry · Vol. 9, Issue 1, 2023 · pp. 1–7 Read article
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Fast Lanes by Design: Quantifying RFID Electronic Tolling Impacts on Plaza Halt Times in Highway
Abstract: Abstract—Rapid urban growth and the steady rise in the number of vehicles have made congestion at highway toll plazas a persistent and costly problem. Long queues at toll booths not only waste travelers’ time but also increase fuel consumption, air pollution, and overall operating costs of the transport system. Traditional manual toll collection methods contribute significantly to these delays, as vehicles are required to stop for cash or card-based transactions. …
Published in International Journal of Transportation Engineering and Traffic System · Vol. 12, Issue 1, 2026 · pp. 1–6 Read article
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Fast Lanes by Design: Quantifying RFID Electronic Tolling Impacts on Plaza Halt Times in Highway
Abstract: Abstract—Rapid urban growth and the steady rise in the number of vehicles have made congestion at highway toll plazas a persistent and costly problem. Long queues at toll booths not only waste travelers’ time but also increase fuel consumption, air pollution, and overall operating costs of the transport system. Traditional manual toll collection methods contribute significantly to these delays, as vehicles are required to stop for cash or card-based transactions. …
Published in International Journal of Transportation Engineering and Traffic System · Vol. 12, Issue 1, 2026 Read article
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Fast Lanes by Design: Quantifying RFIDElectronic Tolling Impacts on Plaza HaltTimes in Highway
Abstract: Abstract Rapid urban growth and the steady rise in the number of vehicles have made congestion at highwaytoll plazas a persistent and costly problem. Long queues at toll booths not only waste travelers’ timebut also increase fuel consumption, air pollution, and overall operating costs of the transport system.Traditional manual toll collection methods contribute significantly to these delays, as vehicles arerequired to stop for cash or card-based transactions. To address these …
Published in International Journal of Transportation Engineering and Traffic System · Vol. 12, Issue 1, 2026 · pp. 1–6 Read article
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Quantifying the Variables Related to Housing Delivery Methods, Housing Quality Levels and Customer Satisfaction in Indian Context
Abstract: “Housing” the phrase is one the major traditional basic need of human life survival. With increasing urbanization the term “housing” is fasten with approachability, hygiene, security, goods availability etc. Basics of housing arises with its purchase and sale considering all needed parameters as or for a customer and their satisfaction. So, this paper dispenses with evaluation of customer satisfaction of housing due to quality levels of house units by housing …
Published in International Journal of Architecture and Infrastructure Planning · Vol. 6, Issue 1, 2020 · pp. 41–52 Read article
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Quantification of some Bioactive components and Antioxidant Activity of Various Uniflora Origin Bee Honey Collected During 2016 from East Libya
Abstract: In this study seven honey samples from three different cities of East Libya were collected in order to evaluate their biochemical properties and antioxidant activities. The results show that the proline content ranged from 77.32-222.43mg/kg. The total phenolic and total flavonoid contents ranged from 62.75-156.30mg/100g and from 13.94-78.31mg/100g, respectively. While the carotenoids content ranged from 1.0-7.38mg/kg. The antioxidant activities of Libyan honey samples were also investigated, based on free radical …
Published in International Journal of Agrochemistry · Vol. 5, Issue 2, 2019 · pp. 1–12 Read article
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Determination of Poly Chlorinated biphenyls in sediment of Trondheim fjord (Norway) and Lake Tana (Ethiopia) using pressurized liquid extraction (PLE) and Gas Chromatography – Mass Spectrometry (GC-MS).
Abstract: The presence of polychlorinated biphenyls (PCBs) in the environment is of great concern, as they are compounds that are hazardous to the environment and human health. Environmental investigations of PCBs can be challenging as they are found in trace amount, thus, it is important to have a reliable method for the determination of PCBs in environmental samples. In this work, an analytical method for the determination of PCBs in marine …
Published in International Journal of Environmental Chemistry · Vol. 5, Issue 2, 2019 · pp. 1–10 Read article
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High Performance Liquid Chromatography - A Separation Technique in Chemical Analysis
Abstract: High-performance liquid chromatography (HPLC) is a chromatographic technique used to split a mixture of compounds in the fields of analytical chemistry, biochemistry and industrial. The main purposes for using HPLC are for identifying, quantifying and purifying the individual components of the mixture. High-performance liquid chromatography or high-pressure liquid chromatography (HPLC) is a chromatographic method that is used to separate a mixture of compounds in analytical chemistry and biochemistry so as …
Published in International Journal of Chemical Separation Technology · Vol. 3, Issue 2, 2017 · pp. 14–17 Read article
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Establishment of a Sensitive LC-MS Method for Pharmacokinetic Evaluation of Decitabine and Cedazuridie in Rat Plasma
Abstract: A simple, rapid, and highly sensitive liquid chromatography–mass spectrometry (LC–MS) method was successfully developed and validated for the simultaneous determination of Decitabine and Cedazuridine in plasma matrices. The method demonstrated excellent linearity across the selected calibration range, with correlation coefficients (R²) consistently exceeding 0.999 for both analytes, indicating strong analytical performance. Method validation was carried out in accordance with ICH Q2(R2) and US FDA bioanalytical method validation guidelines, ensuring compliance …
Published in International Journal of Green Chemistry · Vol. 12, Issue 1, 2026 · pp. 34–42 Read article
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Establishment of a Sensitive LC-MS Method for Pharmacokinetic Evaluation of Decitabine and Cedazuridie in Rat Plasma
Abstract: Abstract A simple, rapid, and highly sensitive liquid chromatography–mass spectrometry (LC–MS) method was successfully developed and validated for the simultaneous determination of Decitabine and Cedazuridine in plasma matrices. The method demonstrated excellent linearity across the selected calibration range, with correlation coefficients (R²) consistently exceeding 0.999 for both analytes, indicating strong analytical performance. Method validation was carried out in accordance with ICH Q2(R2) and US FDA bioanalytical method validation guidelines, ensuring …
Published in International Journal of Green Chemistry · Vol. 12, Issue 1, 2026 · pp. 34–42 Read article
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Sensitive Spectrophotometric and Flame Photometric Methods for Determination of Diclofenac Sodium in Pharmaceuticals
Abstract: Diclofenac sodium (DFS) is a non-steroidal anti-inflammatory drug (NSAID). Two new analytical methods have been developed for the assay of DFS in its pure form, tablets and injections. Spectrophotometric method is based on the oxidation of drug with known excess of cerium(IV) and oxidation of methyl orange (MO) by residual oxidant and measurement of absorbance of unreacted MO at 470 nm. Flame photometric method is based on the measurement of …
Published in International Journal of Analytical and Applied Chemistry · Vol. 2, Issue 2, 2016 · pp. 1–10 Read article
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A Study to Analyze Pectin Extracted from the Peels of Lemon (Citrus lemon), Grapefruit (Citrus paradisi) and Sweet Orange (Citrus sinensis)
Abstract: The present study carried out was on the production of the lactic acid by the lactic acid bacteria under the submerged fermentation conditions using three different supplements of fermentation media including sugarcane juice, sugar beet juice and sugarcane molasses. The study also aimed on the comparative study in lactic acid production under different substrates. For this, the lactic acid bacteria were isolated from the curd sample by the spread plate …
Published in International Journal of Green Chemistry · Vol. 8, Issue 1, 2022 · pp. 46–68 Read article
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Design And Finite Element Analysis Of RCC And Timber-Composite RCC Columns with Seismic Effect
Abstract: This study presents the design and finite-element analysis (FEM) of three reinforced cement concrete (RCC) column configurations under seismic effect, with the objective of quantifying how a central Sal-timber core alters the structural performance of an otherwise conventional RCC column. All three columns are of identical external size (300 × 300 mm) and clear height 3.0 m, fixed at both ends, and use M30 concrete, Fe500 steel, 4–16 mm φ …
Published in International Journal of Structural Mechanics and Finite Elements · Vol. 12, Issue 2, 2026 Read article
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A Study on Machine-Learning-Driven Insight into theThermal Behavior of Polymers and Composite Materials
Abstract: The thermal performance of polymeric and composite systems underpins their suitability for aerospace, electronics, and energy‑storage applications, yet reliable prediction of temperature‑dependent properties remains a formidable challenge. In this work we present a data‑driven framework that harnesses modern machine‑learning (ML) techniques to forecast key thermal metrics – glass‑transition temperature (Tg), melting point (Tm), thermal conductivity (k), and decomposition onset (Td) – from a chemically informed descriptor space. A curated database …
Published in International Journal of Polymer Science and Engineering · Vol. 12, Issue 1, 2026 · pp. 1–11 Read article
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The Biomechanical Impact of Slipper Sole Compliance on Lumbar Spine Load: A Quantitative Analysis of Indoor Footwear Ergonomics
Abstract: Abstract The global shift toward remote work has significantly increased the duration of indoor footwear usage, yet the ergonomic standards for slippers remain critically under-researched compared to athletic or industrial footwear. While "high-compliance" or soft slippers are traditionally marketed for immediate comfort, excessive mechanical softness may lead to foot instability, altered gait kinetics, and subsequent compensatory stress on the lumbar spine. This study aims to quantify the correlation between varying …
Published in International Journal of Mechanics and Design · Vol. 12, Issue 1, 2026 · pp. 30–35 Read article
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Mitigation Measures and Disaster Preparedness: Kapkese Landslides in Kokwet Sub-Location, Kericho County, Kenya
Abstract: Abstract: The Kapkese landslide disaster struck again in December 2015, precipitated by intense, prolonged heavy rainfall from El Niño rainstorms that devastated much of Kenya. Located in the remote Kokwet Location within Kipkelion West Constituency, Kenya, this rural village has endured recurrent geohazards, most notably a deadly May 2003 event that buried a homestead, resulting in the tragic loss of a mother and her three young daughters. These incidents have …
Published in International Journal of Geological and Geotechnical Engineering · Vol. 12, Issue 1, 2026 Read article
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Synthesis, Spectral Study, SEM Analysis and Antibacterial Study of New Indole Azo Ligand and Complexes
Abstract: Azo ligands have developed significantly in recent decades due to their fundamental role in the coordination chemistry of transition elements. Their rapid response to coordination bonding in ligand and complex chemistry, particularly with divalent ions, is a key factor. The azo-bridged bond has played a well-established role in the formation of cobalt, nickel, and copper complexes. In this study, we prepared a novel ligand, an indole derivative bonded to an …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 12, Issue 1, 2026 · pp. 1–10 Read article
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Analytical Evaluation of heavy metals in eyeshadows: A Risk assessment and Implications for Public Health Regulatory Reforms in Nigeria
Abstract: This study employs advanced analytical techniques to assess heavy metal contamination (Pb, Cd, Cr, Ni, Zn) in 18 commercially available eyeshadow products (local and imported) from Owerri Metropolis, Nigeria. Quantification was conducted using atomic absorption spectroscopy (AAS), while risk evaluations incorporated chemometric modeling approaches. Results revealed significant contamination in locally manufactured brands, particularly those containing calabash chalk (Nzu) as a base ingredient. Lead and nickel concentrations reached 166.58 ± 6.5 …
Published in International Journal of Analytical and Applied Chemistry · Vol. 12, Issue 1, 2026 Read article