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Sodium alkylbenzene sulfonates (ABS), or linear alkylbenzene sulfonates (LAS), are among the most common synthetic anionic surfactants and water pollutants, capable of causing both acute and chronic toxic effects on aquatic organisms. The selective determination of sodium alkylbenzene sulfonates as a distinct class of anionic surfactants in complex natural matrices is feasible by gas chromatography with mass spectrometric detection (GC–MS) in the form of linear alkylbenzenesulfonic acid methyl esters (LABSA ME). The behavior of LAS and LABSA ME was studied under ascending high-performance thin-layer chromatography (HPTLC) using Kieselgel 60 F254 and Sorbfil plates to purify extracts and preconcentrate analytes. A mixture of n-hexane with methanol (23 : 1, v/v) is proposed as a mobile phase. Under these conditions, sodium alkylbenzene sulfonates remain at the start line, while their derivatives (LABSA ME), obtained by methylation with trimethyl orthoformate in the presence of trifluoroacetic acid (yield η = 98%), form zones characterized by retention factors Rf of 0.62–0.71 on Kieselgel 60 F254 and Sorbfil plates, respectively. The repeatability of Rf values is characterized by a relative standard deviation of 6.1 and 5.9%, respectively (n = 16). The completeness of the extraction (95.0–100.0%) of analytes from the plates is noted using descending HPTLC with acetonitrile. The applicability of the HPTLC method for preconcentrating analytes and purifying extracts is demonstrated using real water samples. Using GC–MS with electron impact ionization, concentrations of sodium alkylbenzene sulfonates were found in water sampled from the southern basin of Lake Baikal at a depth of 400 m (0.24 ± 0.02 µg/L) and in water obtained from melting snow collected from the ice of the Krestovka River at its mouth near the settlement of Listvyanka (31.1 ± 1.0 µg/L). [ABSTRACT FROM AUTHOR]

Flavonoids constitute a class of polyphenolic secondary metabolites synthesised mainly by plants and possessing anticancer, antioxidant, anti-inflammatory, and antiviral properties. Common buckwheat (F. esculentum Moench) is a dicotyledonous plant rich in different classes of flavonoids (e.g., rutin) and other phenolic compounds. Lipochitooligosaccharides (LCOs), i.e., rhizobial Nod factors and important signalling molecules for the initiation of symbiosis with legumes, are very effective mitogens that stimulate cell division in plant meristems and the production of secondary metabolites. They can also act in this way in non-legume plants. It has been shown that rhizobial Nod factors noticeably improve plant growth. Rhizobial Nod factors influence the production of flavonoids in common buckwheat grown in greenhouse conditions. The amount of rutin and isoorientin in leaves and flowers has been shown to increase in a statistically significant way after application of Nod factors to buckwheat seeds. The presence of rhizobial Nod factors has no influence on the flavonoid content in stems and roots. [ABSTRACT FROM AUTHOR]

Background/Objective: Numerous studies have demonstrated the ethno-and pharmacological properties of various Artemisia species. However, this plant genus which grows abundantly and wildly in the 'Tébessa' Algerian region has not been investigated. This study focuses on the phytochemical characterization, biological activities evaluation with the antibacterial fraction identification of the aerial part aqueous extract (AE) and essential oil (EO) from Algerian Artemisia herba alba (Aha) growing wild in the 'Tebessa' region. Methods: Polyphenols, flavonoids, and condensed tannins were analyzed by spectrophotometer and the antimicrobial activity was determined by the gel diffusion followed by micro-dilution methods. The antioxidant effect was assayed using 2,2-diphenyl-1-picrilhidrazil (DPPH), total antioxidant capacity (TAC), and ferric reducing power (FRAP) tests. The cytotoxic and anti-leishmaniasis activities were experienced on Raw 264.7 cell line and on L. infantum and L. major promastigotes respectively. Thin-layer chromatography (TLC)/autobiography and gas chromatography-mass spectrometry (GC-MS) techniques were used to isolate and identify the antibacterial compounds. EO profile was determined by GC-MS analysis. Results: The extracts (AE and EO) demonstrated antioxidant activity, with the AE exhibiting the most pronounced levels. Both extracts showed antimicrobial activity against all the strains tested however; the EO effect was more effective, especially against the E. feacalis strain with a minimum inhibitory concentration (MIC) value of 0.0625 mg/mL. The antibacterial fraction exerted by AE towards E. feacalis was identified. AE and EO extracts showed antileishmanial activity and no toxic effect however, volatile extract was the most effective. EO profile revealed 19 identified compounds, led by camphor (51.14%), followed by 1,8 Cineole (19.30%), camphene (6.90%) and chrysanthenone (5.68%). Conclusion: As a result, the both extracts promise a high potential applications in agri-food, pharmaceutical, cosmetic sectors. This study aligns with Sustainable Development Goals (SDGs) 3, 12, and 15, emphasizing potential health benefits, the responsible use of natural resources, and biodiversity conservation. [ABSTRACT FROM AUTHOR]

Traditional Mexican medicine commonly uses infusions of Ternstroemia spp. to treat insomnia, injuries, and infections. The antibacterial activities of Ternstroemia dentisepala and Ternstroemia lineata were evaluated for the first time against a panel of Gram-positive and Gram-negative bacteria that have implications for human health, including Enterococcus faecalis, Streptococcus agalactiae, Streptococcus pyogenes, Salmonella typhi, Pseudomonas aeruginosa, and Vibrio parahaemolyticus. Furthermore, the scavenging potential of the hydroalcoholic (HAEs) and total phenolic extracts (TPEs) from the leaves of both plants by a 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) assay (ABTS•+) was determined. Also, the total phenolic contents of the HAEs using the Folin–Ciocalteu reagent were assayed. T. dentisepala HAE and TPE were active against all bacterial strains tested, with a minimum inhibitory concentration between 1.0 and 6.0 mg/mL, with the last one being the most active. However, the T. lineata extracts only demonstrated effectiveness against S. typhi and P. aeruginosa. The TPEs from T. dentisepala and T. lineata improved the activity by approximately 30% in all bacteria tested in comparison with the HAEs. The T. dentisepala HAE had a higher total phenolic content than the T. lineata extract, which was consistent with its ABTS•+-scavenging activity. The two HAEs had different chemical profiles, mostly because of the types and amounts of phenolic compounds they contained. These profiles were obtained using thin-layer chromatography (TLC), high-performance liquid chromatography (HPLC), and proton nuclear magnetic resonance (1H NMR) experiments. [ABSTRACT FROM AUTHOR]

Three-dimensional charge-trapping (CT) NAND flash memory has attracted extensive attention owing to its unique merits, including huge storage capacities, large memory densities, and low bit cost. The reliability property is becoming an important factor for NAND flash memory with multi-level-cell (MLC) modes like triple-level-cell (TLC) or quad-level-cell (QLC), which is seriously affected by the intervals between program (P) and erase (E) operations during P/E cycles. In this work, the impacts of the intervals between P&E cycling under different temperatures and P/E cycles were systematically characterized. The results are further analyzed in terms of program disturb (PD), read disturb (RD), and data retention (DR). It was found that fail bit counts (FBCs) during the high temperature (HT) PD process are much smaller than those of the room temperature (RT) PD process. Moreover, upshift error and downshift error dominate the HT PD and RT PD processes, respectively. To improve the memory reliability of 3D CT TLC NAND, different intervals between P&E operations should be adopted considering the operating temperatures. These results could provide potential insights to optimize the lifetime of NAND flash-based memory systems. [ABSTRACT FROM AUTHOR]

Introduction. Despite the proven clinical efficacy of antifungal and anti-inflammatory drugs for the prevention and treatment of seborrheic dermatitis, the search for new targets and the development of new substances with a beneficial effect on the scalp microflora, with a low risk of antimicrobial resistance and adverse effects, are relevant.Aim. Development of the antimicrobial multicomponent pharmaceutical substance of plant origin in stages: from a literature search for promising substances, analysis of their composition by GC-MS, in silico evaluation of the affinity of individual components to pathogenetic targets, selection of the optimal composition of a multicomponent substance based on the results of in vitro research of antimicrobial action and the making of a medical dosage form based on it – a medicinal shampoo for the treatment of seborrheic dermatitis.Materials and methods. Objects of research: tea tree essential oil, 1,8-cineole, α-(-)-bisabolol and the multicomponent substance based on them. Methods: molecular docking (AutoDock version 4.2), prediction of pharmacological activity (Phyto4Health), TLC, GC-MS, study of antimicrobial activity in vitro.Results and discussion. Based on the results of a literature search, 3 promising substances were selected for the development of a multicomponent plant-based substance: tea tree essential oil, 1,8-cineole and α-(-)-bisabolol. Molecular docking predicted the targeted activity of the phytochemicals of tea tree essential oil, 1,8-cineole and α-(-)-bisabolol on the domains of ABC-transporters of microorganisms involved in the pathogenesis of seborrheic dermatitis and justified the possibility of use for therapy. The multicomponent substance has been developed based on tea tree essential oil, 1,8-cineole and α-(-)-bisabolol in a mass ratio of 1 : 1 : 1. The qualitative composition of the substance was assessed by TLC and GC-MS methods, and 15 terpenes were quantitatively identified in its composition with a predominance of terpinen-4-ol (16.98 %), 1,8-cineole (25.63 %) and α-(-)-bisabolol (27.67 %). The synergistic antimicrobial activity of the substance has been established against S. epidermidis, S. aureus, C. albicans and M. furfur in comparison with benzalkonium chloride, ketoconazole and climbazole. The composition of a new medical shampoo based on the investigated substance has been developed, which has a pronounced antifungal effect (more than 99.0 %) against M. furfur without visible suppression of normal microflora. For the novel substance of plant origin and medical shampoo, quality parameters were assessed in accordance with the Russian Pharmacopoeia of XIV edition.Conclusion. A substance of plant origin with synergistic and targeted antimicrobial activity has been developed. It has an interest for further study as a drug and API for new products for the treatment of seborrheic dermatitis.

Abstract Pentachlorophenol (PCP) is a manmade chemical that is widely present in the environment and is mostly used as a wood preservative. Therefore, to conduct remediation studies, it is imperative to determine the most effective PCP analytical technique. PCP can be analyzed using a variety of analytical tools, including non-destructible methods like X-ray fluorescence spectrometry (XRF) and electrochemical sensors (EC), destructible tools like gas chromatography (GC), thin layer chromatography (TLC), colorimetry, ultraviolet–visible and infrared spectroscopy (UV–vis/IR), and high-performance liquid chromatography (HPLC). the colorimetric approach is less recommended because of its low sensitivity and precision, whereas TLC offers superior recovery rates and precision but is expensive, takes longer, and is unable to resolve complicated combinations. Higher recovery rates, sensitivity, precision, and superior separation are all offered by HPLC; however, its effectiveness is impacted by time, money, and solvent compatibility. The most favored destructible approach is GC because it is efficient in terms of both cost and time and offers superior precision and separation. Although XRF is frequently used in the wood industry to test PCP in treated wood and treating solutions, scientific research has avoided using it because of its high cost and ability to identify chemicals based only on their elemental composition—in the case of PCP, it is chloride. Among all methods, EC is shown to be more dependable than the other methods listed because it is extremely specialized, less expensive, and offers a faster response. It is possible to make more changes to the current analytical techniques, such as enhancing extraction techniques, creating a universal HPLC column, developing more affordable and high-precision EC electrodes, and evaluating a larger variety of samples from different matrices. This review has shed light on the many analytical tools available for determining PCP and the knowledge gaps in the field of study.

The present work is concerned with the novel, accurate, and precise quantification of beclomethasone dipropionate and fusidic acid in combination (cream), which was performed using high-performance thin-layer chromatography (HPTLC), and validation was performed based on International Council for Harmonization guidelines (Q2 R1). A series of HPTLC tests was conducted on pre-coated silica gel G60 F254 plates as the stationary phase and n-hexane:ethyl acetate:toluene:diethyl ether (4.5:5.5:1:0.2, v/v/v/v) as the mobile phase. Chamber saturation time was 30 min to attain the desired results. The Rf of beclomethasone dipropionate and fusidic acid was determined to be 0.52 and 0.36 respectively. The densitometric estimation was performed in reflectance mode at 238 nm. A linear relationship was seen in the range of 0.4–2.0 μg/band for beclomethasone dipropionate and 0.8–4.0 μg/band for fusidic acid with R2 of 0.9914 and 0.9927 for beclomethasone dipropionate and fusidic acid respectively. The limit of detection was found to be 0.2653 and 0.27040 for beclomethasone dipropionate and fusidic acid respectively, and the limit of quantification was found to be 0.42065 and 0.81940 for beclomethasone dipropionate and fusidic acid respectively. The percentage recovery was found to be within the range 98–102% for both beclomethasone dipropionate and fusidic acid. The method proposed was determined to be novel, error-free, robust, and reproducible. [ABSTRACT FROM AUTHOR]

Acalypha indicais an important medicinal plant and traditionally used as throat infections, wound healing, arthritis, ulcer and diabetes mellitus. Thin layer chromatography (TLC) the present study showed separation of two deep violet colour spots with RF values 0.31 and 0.72 which may represent the presence of alkaloids. Infra-Red (IR) spectral analysis of Acalypha indica showed C-H, -C=C-, N-H bend, C-C, C-H rock, O-H bend and C-C1 stretchings which may be attributed to the presence of functional groups like alcohol, alkenes, primary amines, alphatic amines and alkylhalides. [ABSTRACT FROM AUTHOR]

Mycotoxins are secondary fungal metabolites harmful to humans and animals. Patulin (PAT) is a toxin found in different food products but especially in apples and their derivative products. The most common fungi producers of this compound are Aspergillus clavatus and Penicillium expansum. The production of patulin, as other mycotoxins, can be impacted by diverse phenomena such as water and nutrient availability, UV exposure, and the presence of antagonistic organisms. Consequently, gaining a comprehensive understanding of climate and environmental conditions is a crucial step in combating patulin contamination. In this study, moulds were isolated from 40 apple samples collected from seven locations across Hungary: Csenger, Damak, Pallag, Lövőpetri, Nagykálló, and Újfehértó. A total of 183 moulds were morphologically identified, with 67 isolates belonging to the Alternaria, 45 to the Aspergillus, and 13 to the Penicillium groups. The location possessed a higher influence than farming method on the distribution of mould genera. Despite the requirement of higher temperature, Aspergillus species dominated only for the region of Újfehértó with approximately 50% of the isolates belonging to the genus. Four of the seven locations assessed: Csenger, Debrecen-Pallag, Nyírtass and Nagykálló, were dominated by Alternaria species. All isolates belonging to the genera Aspergillus and Penicillium were tested for the presence of the isoepoxidone dehydrogenase (idh) gene, a key player in the patulin metabolic pathway. To guarantee patulin production, this ability was confirmed with TLC assays. The only Aspergillus strain that presented a positive result was the strain Aspergillus clavatus B9/6, originated from the apple cultivar Golden Reinders grown in Debrecen-Pallag by integrated farming. Of the Penicillium isolates only one strain, B10/6, presented a band of the right size (500-600 bp) for the idh gene. Further sequencing of the ITS gene showed that this strain should be classified as Talaromyces pinophilus. The TLC tests confirmed this microorganism as the only patulin producer under the studied conditions for its cluster. [ABSTRACT FROM AUTHOR]

Sponge-associated marine fungi are potential source for secondary metabolite compounds. The aim of this research was to investigate sponge-associated marine fungus as secondary metabolite producers against Escherichia coli. The fungus was isolated from Indonesian marine sponge Stylissa sp. and identified as Aspergillus hortai through a combination of morphological and molecular characteristics of ITS DNA and β-tubulin genes. The fungus was tested against E. coli using fungal broth and mycelial extracts. The optimized condition was achieved by fungal broth grown in corn meal broth at 6-days of shaking incubation. Fungal extract was produced using three liters of filtered fungal broth and extracted in ethyl acetate. The antibiotic activity of the extract is vulnerable to 45°C heat and basic or acidic conditions. Therefore, the extraction was done at pH 7 with evaporation at 40°C. The extract shows 7 major bands on TLC with 1 band shows activity against E. coli (Rf 0.81) on bioautogram. The band was observed as a yellow color and turned black in short-wave UV and did not show any fluorescence in long-wave UV. This research shows that sponge- associated marine fungi obtained from Indonesia has the potential as anti E. coli worth to be explored for searching new antibiotics. [ABSTRACT FROM AUTHOR]

Objective: This study investigates the biological activities of Rhododendron arboreum Sm from the eastern Himalayas, addressing a literature gap on its properties. It explores the plant's phytochemical, antioxidant, and medicinal characteristics. Significance: Evaluating methanolic extracts of R. arboreum offers valuable insights into its bioactive potential. Comprehensive GC-MS analysis identified a diverse array of compounds, highlighting the plant's chemical composition. Methods: Methanolic leaf and flower extracts underwent sequential extraction and phytochemical profiling using column chromatography, TLC, and GC-MS analysis. Spectral studies aided compound identification, and antioxidant activity was assessed via spectrophotometric assays. Results: Column chromatography separated methanol leaf and flower extracts into 17 and 24 distinct fractions, respectively. TLC analysis showed specific Rf values for leaf (0.58, 0.65, 0.75, 0.8, 0.86, 0.9) and flower samples (0.91, 0.38, 0.48, 0.51, 0.56, 0.6, 0.65, 0.75, 0.85, 0.96). GC-MS analysis revealed a variety of organic functional groups, including aliphatic hydrocarbons, aromatic compounds, heterocyclic molecules, phenolic compounds, steroids, terpenoids, alcohols, esters, and other bioactive compounds. FTIR spectra identified functional groups such as hydroxyls, primary amines, alkanes, and alkynes. NMR data indicated a complex molecular composition with diverse proton environments. Leaf extracts demonstrated superior antioxidant activity compared to flower extracts in DPPH, ABTS, hydrogen peroxide scavenging, lipid peroxidation inhibition, and FRAP assays. Conclusion: The study identifies diverse phytochemicals in R.arboreum extracts and highlights their potential applications in pharmaceuticals, nutraceuticals, and functional foods, owing to the superior antioxidant activity of leaf extracts compared to flowers. [ABSTRACT FROM AUTHOR]

Combretum indicum (L.) DeFilipps., also known as Quisqualis indica, belongs to the combretaceae family. Literature suggests the hardy nature and predominant presence of medically important phytometabolites within these plants. This study aimed to identify the phytochemical constituents of the Combretum indicum flower extracts. Flower extracts were prepared using Aqueous, ethanol, n-Hexane and petroleum ether as the solvents of choice. Qualitative phytochemical analysis indicated the presence of phytometabolites including alkaloids, flavonoids, terpenoids, phenols, quinines, steroids, saponins etc. Among these solvents ethanolic flower extract showed better results. The quantitative analysis of flower extract indicated the presence good quantity of flavonoids and phenols respectively. Anti-oxidant activity was tested using DPPH scavenging assay. Characterization of phytochemicals was done by using UV-Visible spectrophotometry, FTIR analysis and thin layer chromatography. [ABSTRACT FROM AUTHOR]

In the present investigation, phytochemical screening of different extracts of Wrightia tinctoria has been tested by using standard procedures. The findings showed the presence of alkaloids, flavonoids, phenols, steroids, terpenoids and glucosides. Among the four solvents tested (aqueous, ethanol, N-hexane and ethyl acetate) ethanol extract of leaf showed the best result. The free radical scavenging activity of both the extract was measured by using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay. The aqueous and ethanol extracts of Wrightia tinctoria leaf shows slightly different antioxidant activity. The remarkable activity showed by the plant is due to the synergic effect of active compounds present in it. Characterization of phytochemicals was done by using UV-Visible spectrophotometry, FTIR analysis and Thin layer chromatography. [ABSTRACT FROM AUTHOR]

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Pentachlorophenol (PCP) is a manmade chemical that is widely present in the environment and is mostly used as a wood preservative. Therefore, to conduct remediation studies, it is imperative to determine the most effective PCP analytical technique. PCP can be analyzed using a variety of analytical tools, including non-destructible methods like X-ray fluorescence spectrometry (XRF) and electrochemical sensors (EC), destructible tools like gas chromatography (GC), thin layer chromatography (TLC), colorimetry, ultraviolet–visible and infrared spectroscopy (UV–vis/IR), and high-performance liquid chromatography (HPLC). the colorimetric approach is less recommended because of its low sensitivity and precision, whereas TLC offers superior recovery rates and precision but is expensive, takes longer, and is unable to resolve complicated combinations. Higher recovery rates, sensitivity, precision, and superior separation are all offered by HPLC; however, its effectiveness is impacted by time, money, and solvent compatibility. The most favored destructible approach is GC because it is efficient in terms of both cost and time and offers superior precision and separation. Although XRF is frequently used in the wood industry to test PCP in treated wood and treating solutions, scientific research has avoided using it because of its high cost and ability to identify chemicals based only on their elemental composition—in the case of PCP, it is chloride. Among all methods, EC is shown to be more dependable than the other methods listed because it is extremely specialized, less expensive, and offers a faster response. It is possible to make more changes to the current analytical techniques, such as enhancing extraction techniques, creating a universal HPLC column, developing more affordable and high-precision EC electrodes, and evaluating a larger variety of samples from different matrices. This review has shed light on the many analytical tools available for determining PCP and the knowledge gaps in the field of study. [ABSTRACT FROM AUTHOR]

In the brain, connectivity determines function. Neurons in the parabrachial nucleus (PB) relay diverse information to widespread brain regions, but the connections and functions of PB neurons that express Nps (neuropeptide S, NPS) remain mysterious. Here, we use Cre‐dependent anterograde tracing and whole‐brain analysis to map their output connections. While many other PB neurons project ascending axons through the central tegmental tract, NPS axons reach the forebrain via distinct periventricular and ventral pathways. Along the periventricular pathway, NPS axons target the tectal longitudinal column and periaqueductal gray, then continue rostrally to target the paraventricular nucleus of the thalamus. Along the ventral pathway, NPS axons blanket much of the hypothalamus but avoid the ventromedial and mammillary nuclei. They also project prominently to the ventral bed nucleus of the stria terminalis, A13 cell group, and magnocellular subparafasciular nucleus. In the hindbrain, NPS axons have fewer descending projections, targeting primarily the superior salivatory nucleus, nucleus of the lateral lemniscus, and periolivary region. Combined with what is known already about NPS and its receptor, the output pattern of Nps‐expressing neurons in the PB region predicts roles in threat response and circadian behavior. [ABSTRACT FROM AUTHOR]

The purpose of this work was to prove the enrichment of sunflower oil with active principles (polyphenolic acids, flavones, flavonoids) from plants, using the ultrasounds-assisted extraction (UAE) process. The analytical technique used for qualitative characterization of the UAE samples is thin layer chromatography (TLC), a relatively simple technique, which under certain separation and detection conditions highlights the bioactive components of the plants studied in our study. UV-VIS spectrophotometry was used to evaluate the level of flavonoids. The UAE samples in sunflower oil were also characterized by determining the alpha-tocopherol content through a gas-cromatographic method (GC-MS), and by evaluating the antioxidant activity through an indirect DPPH spectrophotometric method. The oily plants extracts were obtained to be used as raw material in the formulation of a dermato-cosmetic product, and thus the characterisation performed herein is very useful in supporting the effects of the above-mentioned products. [ABSTRACT FROM AUTHOR]

This study describes a robust chromatographic authentication methodology for herbaceous pollen, employing gas chromatography–mass spectrometry (GC–MS), high‐performance liquid chromatography (HPLC) and high‐performance thin liquid chromatography (HPTLC) protocols. The comprehensive profiling of organic compounds not only distinguishes between different botanical sources but also establishes a reliable framework for quality control and assessment of herbaceous pollen authenticity. Traces of quercetin were detectable using HPTLC in Chaenomeles japonica, and the composition of the mobile phase led to distinct phenolic acid tracks in the extracts of free phenolic compounds. In Lonicera nummulariifolia, prominent chlorogenic acid signal and traces of 3,4‐dihydroxybenzoic acid were identified, along with the presence of vanillic, trans‐ferulic, p‐coumaric and p‐hydroxybenzoic and sinapic as phenolic acid standards. The HPLC chromatogram identified six peaks representing bioactive phenolic compounds such as gallic acid measuring 5.89 ± 0.56 mg g−1, hydroxybenzoic acid 2.39 ± 0.78 mg g−1 and caffeic acid 2.83 ± 0.11 mg g−1. The combined use of GC–MS, HPTLC and HPLC techniques provides a powerful and reliable means of authenticating the botanical origin of herbaceous pollen, offering valuable insights for quality control and ensuring the accuracy of botanical source identification. [ABSTRACT FROM AUTHOR]

A sensitive and stable spray for thin layer chromatography of acyl-CoA and other thio-compounds has been evaluated. CoA, down to 1 nmol, is readily revealed and by pre- or post-treatment with hydroxylamine or tris(2-carboxyethyl)phosphine, thioesters or disulfides respectively can be stained as well. [ABSTRACT FROM AUTHOR]

Abstract The coronavirus-2 has led to a global pandemic of COVID-19 with an outbreak of severe acute respiratory syndrome leading to worldwide quarantine measures and a rise in death rates. The objective of this study is to propose a green, sensitive, and selective densitometric method to simultaneously quantify remdesivir (REM) in the presence of the co-administered drug linezolid (LNZ) and rivaroxaban (RIV) in spiked human plasma. TLC silica gel aluminum plates 60 F254 were used as the stationary phase, and the mobile phase was composed of dichloromethane (DCM): acetone (8.5:1.5, v/v) with densitometric detection at 254 nm. Well-resolved peaks have been observed with retardation factors (Rf) of 0.23, 0.53, and 0.72 for REM, LNZ, and RIV, respectively. A validation study was conducted according to ICH Q2 (R1) Guidelines. The method was rectilinear over the concentration ranges of 0.2–5.5 μg/band, 0.2–4.5 μg/band and 0.1–3.0 μg/band for REM, LNZ and RIV, respectively. The sensitivities of REM, LIN, and RIV were outstanding, with quantitation limits of 128.8, 50.5, and 55.8 ng/band, respectively. The approach has shown outstanding recoveries ranging from 98.3 to 101.2% when applied to pharmaceutical formulations and spiked human plasma. The method’s greenness was assessed using Analytical Eco-scale, GAPI, and AGREE metrics.

INTRODUCTION. The determination of impurities is a key requirement for the quality assessment of medicines because impurities can significantly impact the quality and therapeutic effectiveness. Pharmacopoeias are the most important scientific and methodological guidelines for manufacturers developing medicinal product specifications and regulators assessing these specifications as part of registration dossiers. Therefore, it is essential to harmonise national and international approaches to impurities.AIM. This study aimed to analyse and summarise pharmacopoeial requirements for and methodological approaches to the control, evaluation, and identification of organic impurities in medicines.DISCUSSION. The authors compared requirements for the control of organic impurities in small-molecule medicines set forth in national and international pharmacopoeias and guidelines of the International Council for Harmonisation of Technical Requirements for Medicinal Products for Medical Use (ICH) and the Eurasian Economic Union (EAEU). This comparison highlighted the differences in current approaches that require further harmonisation of the existing regulatory documentation. Additionally, this study analysed the popularity, advantages, and disadvantages of different options for determining impurities in two-component combination products (i.e. identified and/or unidentified impurities in one or each of the active substances). The analysis demonstrated the need to control nitrosamines and genotoxic impurities and to use selective and highly sensitive chromatographic methods.CONCLUSIONS. When drafting pharmacopoeial monographs for medicinal products, experts should consider the general approach set forth in the EAEU pharmacopoeia and regulations and in the ICH Q3B guideline. This approach recommends that process-related impurities of active substances should not be controlled at the medicinal product level. Therefore, pharmacopoeial monographs for active substances should distinguish degradation products from process-related impurities. Impurities should be determined for each active substance to ensure the quality and safety of fixed combination medicinal products. Priorities for improving the methodological approach to the control of organic impurities include using reference standards for impurities and acknowledging the necessity of impurity quantification.

Introduction. Amino acids (AA), the primary metabolites in plants, play a crucial role in various physiological processes, including the synthesis of phenolic compounds. Drug products and dietary supplements made from medicinal plants can become a rich source of both nonessential and essential amino acids. High levels of free amino acids found in herbal raw material often indicate the presence of biotic and abiotic stress in the plants. Therefore, understanding the dynamics of bioactive compound accumulation in plants throughout their phenological phases of development is critical to optimizing their potential health benefits.Aim. To compare qualitative composition and dynamics of AA accumulation in the underground organs of four representatives of the Rumex genus: R. confertus, R. crispus L., R. obtusifolius L., R. aquaticus L. of three different vegetative phases.Materials and methods. Water extracts from underground organs of the studied plants were analyzed using two different methods for qualitative and quantitative analysis. Extracts were applied to the chromatographic plates TLS Silica gel 60 F254 (Merk, Germany) 20 × 20 cm with a micro-syringe (LLC "Tsvet", Russia). After elution, the plates were treated with a 2 % ninhydrin solution. Quantitative analysis was carried out using the SF-2000 spectrophotometer (LLC "OKB Spectr", Russia).Results and discussion. The amino acid profile of the underground organs of R. confertus, R. crispus L., R. obtusifolius L., R. aquaticus L. during three vegetative phases was determined using the TLC method; the quantitative analysis performed using spectrophotometry.Conclusion. The most diverse amino acid (AA) profiles were found in the withering phase in all Rumex species, with up to 9 amino adsorption zones. In contrast, the least diverse AA profiles were observed in the flowering phase, ranging from 2 to 4 adsorption zones. The quantitative content of AA was lowest in the flowering phase, increased during the regrowth phase, and peaked in the withering phase. However, R. crispus L. showed an unusual pattern, with the highest quantitative content of AA detected in the regrowth phase.

The coronavirus-2 has led to a global pandemic of COVID-19 with an outbreak of severe acute respiratory syndrome leading to worldwide quarantine measures and a rise in death rates. The objective of this study is to propose a green, sensitive, and selective densitometric method to simultaneously quantify remdesivir (REM) in the presence of the co-administered drug linezolid (LNZ) and rivaroxaban (RIV) in spiked human plasma. TLC silica gel aluminum plates 60 F254 were used as the stationary phase, and the mobile phase was composed of dichloromethane (DCM): acetone (8.5:1.5, v/v) with densitometric detection at 254 nm. Well-resolved peaks have been observed with retardation factors (Rf) of 0.23, 0.53, and 0.72 for REM, LNZ, and RIV, respectively. A validation study was conducted according to ICH Q2 (R1) Guidelines. The method was rectilinear over the concentration ranges of 0.2–5.5 μg/band, 0.2–4.5 μg/band and 0.1–3.0 μg/band for REM, LNZ and RIV, respectively. The sensitivities of REM, LIN, and RIV were outstanding, with quantitation limits of 128.8, 50.5, and 55.8 ng/band, respectively. The approach has shown outstanding recoveries ranging from 98.3 to 101.2% when applied to pharmaceutical formulations and spiked human plasma. The method's greenness was assessed using Analytical Eco-scale, GAPI, and AGREE metrics. [ABSTRACT FROM AUTHOR]

Fire blight, a devastating disease caused by Erwinia amylovora, poses a significant threat to pear and apple trees in Xinjiang province, China. In an effort to combat this pathogen, we isolated 10 bacteria from various components of apple and crabapple trees and conducted screenings to assess their ability to inhibit E. amylovora in vitro. Through biochemical tests and partial 16S rRNA gene sequencing, we identified two promising strains, Priestia megaterium strain H1 and Bacillus subtilis strain I2. These strains were then evaluated for their efficacy in biocontrol under controlled laboratory conditions, focusing on immature fruits and leaves. Remarkably, all selected antagonists exhibited the capability to reduce the severity of the disease on both fruit and leaves. P. megaterium strain H1 and B. subtilis strain I2 exhibited significant reductions in disease incidence on both immature fruits and leaves compared to the control. Specifically, on immature fruits, they achieved reductions of 53.39% and 44.76%, respectively, while on leaves, they demonstrated reductions of 59.55% and 55.53%, respectively. Furthermore, during the study, we detected the presence of lipopeptides, including surfactin, iturins, bacillomycin D, and fengycins, in the methanol extract obtained from these two antagonistic bacteria using thin-layer chromatography (TLC). Based on the results obtained, B. subtilis strain I2 and P. megaterium strain H1 exhibit considerable potential for controlling fire blight. However, further evaluation of their efficacy under natural field conditions is essential to validate their practicality as a biocontrol method. [ABSTRACT FROM AUTHOR]

Copyright of Traditional Chinese Drug Research & Clinical Pharmacology is the property of Traditional Chinese Drug Research & Clinical Pharmacology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Breast cancer cell growth is often dependent on the presence of steroidal hormones. The 17β-hydroxysteroid dehydrogenase type 1 isoform (17βHSD1) catalyzes NADPH-dependent conversion of estrone to estradiol, a more potent estrogen, and represents potential drug target for breast cancer treatment. To provide active enzyme for inhibitor screening, 17βHSD1 is usually expressed in insect or mammalian cells, or isolated from human placenta. In the present study we describe a simple protocol for expression and purification of active human 17βHSD1 from Escherichia coli BL21(DE3) cells. Soluble human 17βHSD1 was expressed using a pET28a(+)-based plasmid, which encodes a hexahistidine tag fused to the N-terminus of the protein, and purified by nickel affinity chromatography. The enzyme activity of purified 17βHSD1 was verified by three methods: thin-layer chromatography, an alkali assay and a spectroscopic assay. These non-radioactive enzyme assays require only standard laboratory equipment, and can be used for screening compounds that modulate 17βHSD1 activity. [ABSTRACT FROM AUTHOR]

Estrus identification is one of the common issues in buffaloes because of their short estrus duration and silent estrus problem. Hence, specific biomarkers facilitating in identifying the estrus stage would be helpful to buffalo farmers and researchers. In our previous studies, taurine, a non-protein amino acid that helps in the secretion of reproductive hormones such as GnRH, was found to be associated with postpartum anestrus in buffaloes. Therefore, the present study was conducted to explore the level of taurine in serum during different stages of the oestrous cycle in healthy cyclic buffaloes. Blood samples were collected from healthy cyclic buffaloes (n = 4), and taurine was estimated at the estrus (0th day), proestrus (-2nd day), metestrus (3rd day) and diestrus (+10th day) stages using TLC method. The days of the oestrous cycle were determined by ultrasonography and observation of behavioural signs by trained professionals. The results revealed that taurine was consistently present in the serum. However, the highest concentration of taurine was observed at the proestrus (0.20 ± 0.03 mg/mL) stage, which was greater (p < .05) than metestrus (0.10 ± 0.05 mg/mL) and diestrus (0.13 ± 0.03 mg/mL) stages, but comparable with the estrus stage. These results were also validated in the simulated population datasets of population size 6 to 10,000. Further, ROC curve analysis for the large simulated population indicated the efficiency of taurine to distinguish proestrus from metestrus and diestrus stages at a lower cutoff value of <0.1643 mg/mL with 60% sensitivity and specificity. Therefore, the present study concludes that serum taurine concentration could help in detecting proestrus stage of buffalo estrous cycle. [ABSTRACT FROM AUTHOR]

Mycotoxins are toxic mycological products that when consumed, absorbed or inhaled cause sickness or even the death of humans. Therefore, the present study aimed to evaluate the contamination levels of mycotoxins (aflatoxins, AFB1, AFB2, AFG1, AFG2, and ochratoxin A, OTA) in selected medicinal herbs and shrubs using thin‐layer chromatography (TLC) and high‐performance liquid chromatography (HPLC). A total of 15 samples of medicinal herbs and shrubs were selected. Among them, four samples were aflatoxin contaminated while two samples were ochratoxin A contaminated. The highest level of aflatoxin was detected in Justicia adhathoda (4,704.94 ppb) through HPLC (153.4 ppb) and through TLC, while the lowest level of aflatoxin was detected in Pegnum harmala (205.1 ppb) through HPLC. Similarly, the highest level of OTA was detected in Dodonia viscosa (0.53 ppb) through HPLC (0.5 ppb) and through TLC, while the lowest level was detected in J. adhathoda (O.11 ppb) through HPLC (0.4 ppb) and through TLC. The OTA concentration was very low, being negligible and below permissible limits. The present study concludes that there is a potential risk for the consumption of herbal decoctions. Therefore, regular monitoring and proper management of mycotoxins, including aflatoxins and OTA, in herbal medicines are needed to ensure the safety of herbal drugs to protect consumers. [ABSTRACT FROM AUTHOR]

A sensitive, easy-to-use, fast, and cost-effective TLC-densitometric method was developed for the separation of metronidazole, secnidazole, ornidazole, tinidazole, and 2-methyl-5-nitroimidazole and for the determination of metronidazole and tinidazole in Metronidazole Polpharma and Tinidazolum Polpharma tablets. Analyses were performed on chromatographic plates precoated with silica gel 60F254 using chloroform + methanol + diethylamine in a volume ratio of 9:1:1 as the optimal mobile phase. The method has been validated. The intraday and interday precision values for the three different concentrations ranged from 0.99% to 1.48% and 0.89% to 1.76%, and the precision values ranged from 1.13% to 2.48% and 0.95% to 2.49% for metronidazole and tinidazole, respectively. The limit of quantification (LOQ) was 0.036 and 0.066 µg/spot for metronidazole and tinidazole, respectively. The mean recovery was 103.1% and 100.6% for metronidazole and tinidazole, respectively. The content of metronidazole and tinidazole in tablets in relation to the content declared by the manufacturer was 101.3% and 99.8%, respectively. The obtained results were verified using the pharmacopeial method. The presented method is fast, sensitive, precise, selective, accurate, and robust. It allows for the analysis of several samples on one chromatography plate at the same time. [ABSTRACT FROM AUTHOR]

Background: Cissus quadrangularis is an indigenous medicinal herb which belongs to the family Vitaceae & commonly found in tropical and subtropical xeric wood. This plant is prescribed in the ancient Ayurvedic literature as a general tonic with excellent bone fracture healing properties. Different analytical approaches must be used to characterise the extracts to ascertain the therapeutic efficacy of different solvent-based plant extracts. Aim: Different extracts of Cissus quadrangularis (CQ) were screened by TLC, antioxidant activity and HPTLC. Methods: In the present study, the preliminary phytoconstituents’ analysis of sequential extracts of CQ; Petroleum ether extract (PECQ), Chloroform extract (ChCQ), Ethanol extract (EtCQ) and Water extract (WCQ) has been done by thin-layer chromatography (TLC). Additionally, the usage of derivative reagents and the reaction mechanism between derivative reagents and phytoconstituents were used to confirm the kind of phytoconstituents. The extracts were also evaluated by antioxidant activity that was accessed by the DPPH assay. The extract with the highest antioxidant activity was standardised by HPTLC. Results: Terpenoids, flavonoids, alkaloids, saponins, coumarin, steroidal (phytoestrogen) and other phenolic/polyphenolic phytoconstituents were found to be present in extracts of Cissus quadrangularis. EtCQ showed the highest radical scavenging activity with an IC50 of 31.71±0.30 µg/ml which was significantly higher than PECQ, ChCQ and WCQ extract with an IC50 of 84.82±0.35 µg/ml, 79.16±0.35 µg/ml and 215.06±0.25 µg/ml respectively. EtCQ was standardized by HPTLC to quantify the marker constituent. Conclusion: This publication is the first to describe the in-depth analysis of Cissus quadrangularis extracts using thin-layer chromatography, as well as potential detection pathways using different reagents. TLC profiling also justifies the antioxidant behaviour of different extracts.

Land kale or Ipomoea reptans Poir is widely consumed by Indonesian people. Land kale plants can be used as natural antioxidants because they contain polyphenolic compounds, one of which is phenolic acid. This research was carried out to determine the antioxidant activity and isolate phenolic acid compounds contained in land kale plants (Ipomoea reptans Poir). The sample used was an ethanol extract of land kale. The total phenolics were determined using the Folin-Ciocalteu method. Phenolic acids were isolated using alkaline hydrolysis and acid hydrolysis and without hydrolysis methods. Separation of isolates was carried out using the TLC method. The structure was identified using UV-Vis spectrophotometry and LC-MS/MS. Antioxidant activity was measured using the DPPH method. The total phenolics of land kale ethanol extract were 71.2420 ± 0.0791 mg/g GAE. TLC showed that the HB, HA, and TH fractions contained caffeic acid and ferulic acid compounds. Separation of the (HB) fraction produced three isolates: B2 with a yellow color, B3 with a slightly yellowish color, and B4 which is colorless. Isolate B2 was identified as potentially containing caffeic acid, while isolate B3 was indicated to potentially contain ferulic acid through analysis using a UV-Vis spectrophotometer. Isolate B4 was thought to have a hydroxybenzoic acid framework after being determined using LC-MS/MS. The ethanol extract of land kale has strong antioxidant activity because it produces an IC50 value of 94.83 mg/L.

Abstract Two accurate, sensitive, and selective methods for simultaneous determination of miconazole nitrate (MIC), nystatin (NYS), and metronidazole (MET) in pure state or drug product were established and verified. First, RP-HPLC-DAD was designed. Separation was accomplished using a ZOBRAX Eclipse Plus RP-C8 column that was running under an isocratic elution of methanol: 0.05% aqueous solution of sodium dodecyl sulphate (40: 60 v/v), with a flow rate that was regulated at 0.8 mL/min. The column temperature was adjusted at 25 °C and diode array detector was monitored at 220 nm. The linearity range of the proposed method was achieved at the concentration of 5–50, 4–50, and 4–40 µg/mL and the attained retention time for the studied drugs was 2.52, 3.52 and 4.99 min for MIC, NYS, and MET, correspondingly. Second, a TLC-densitometric approach was used to resolve the three compounds. Resolution of the three cited drugs was carried out using TLC aluminum plates pre-coated with 0.25 mm silica gel 60 F254. A developing solvent comprised ethyl acetate: toluene: methanol: triethyl amine: formic acid (3: 1: 7: 0.3: 0.1 by volume) (pH = 5.5) was utilized and scanning of the resolved bands at 215 nm. Linearity of the developed TLC method was evaluated and evident to be 0.4–2, 0.4–2.2, and 0.4–2 μg/band for MIC, NYS, and MET, in that order. The suggested chromatographic methods were verified according to ICH directives. The findings of the developed chromatographic procedures were statistically compared with the results of the reported ones using student’s t-test and F-test. Furthermore, two green assessment tools evaluated the indicated methods' level of greenness (GAPI and AGREE).

This study aims to scrutinize the phenolic secondary metabolites in the polar peel decocture of Malus domestica var Maharaji via hyphenated techniques along with the study of the antibacterial, anti-candida, and tyrosinase inhibitory potential of bioactive compound-rich fractions. Preliminary phenolics go over was performed together with thin layer chromatography before the polar decocture was subjected to hyphenated techniques. FTIR investigation revealed the C-O bonds as in phenols, O-H bond stretch, and vibrations of alcohols and carboxylic acids as well as portrayed the C-H and >C=O stretches among other functional groups all of which are representative of phenolic and polyphenolic compounds. GC-MS perusal demonstrated the presence of bioactive compounds like Quercetin (13.04%), Ascorbic acid (6.48%), p-Coumaric acid (6.17%), Caffeic acid (5.69 %), Mallic acid (5.44%), Apigenin (5.28%), Citric acid (5.15%), Gallic acid (4.38%), Cyanidin (3.52%), and Ferulic acid (3.51%). Kirby-Bauer method followed by the resazurin microtiter assay technique (REMA) for MIC/MBC against six MTCC bacterial strains and one yeast, all producing stubborn opportunistic infection in humans, was used to assess the antibacterial property of all the bioactive rich fractions. Some fractions comparatively revealed a good activity index (AI) against tested microbes. MIC concentrations for bacteria ranged from 15-24 mg/ml while a lower MBC value recorded was 18 mg/ml. Methanol fraction revealed significant tyrosinase inhibitory activity by revealing IC50 of 980.98 µg/ml when L-Tyrosine was substrate and IC50 of 830.68 µg/ml when L-DOPA was substrate when juxtaposed to standard kojic acid that revealed IC50 of 128.822 µg/ml when L-Tyrosine was substrate and IC50 of 149.43 µg/ml when L-DOPA was substrate. The bioactive compounds possessed by the fractions, may be synergistically, turned out to be more effective in the diphenolase reaction and kojic acid acts more effectively in the monophenolase one. It was inferred that peel phenolics of this malus variety have a lot of therapeutic potential in the context of bacterial infections and pigmentation disorders.

Flavonoids constitute a class of polyphenolic secondary metabolites synthesised mainly by plants and possessing anticancer, antioxidant, anti-inflammatory, and antiviral properties. Common buckwheat (F. esculentum Moench) is a dicotyledonous plant rich in different classes of flavonoids (e.g., rutin) and other phenolic compounds. Lipochitooligosaccharides (LCOs), i.e., rhizobial Nod factors and important signalling molecules for the initiation of symbiosis with legumes, are very effective mitogens that stimulate cell division in plant meristems and the production of secondary metabolites. They can also act in this way in non-legume plants. It has been shown that rhizobial Nod factors noticeably improve plant growth. Rhizobial Nod factors influence the production of flavonoids in common buckwheat grown in greenhouse conditions. The amount of rutin and isoorientin in leaves and flowers has been shown to increase in a statistically significant way after application of Nod factors to buckwheat seeds. The presence of rhizobial Nod factors has no influence on the flavonoid content in stems and roots.

Featured Application: This article reports the bioactivity activity of macroalgae pigments against fungal agents of human skin diseases. Since this topic has not been thoroughly explored, this article presents a compilation of techniques to obtain the highest pigment yield, optimizing the methodology for both the extraction and separation of pigments, together with the anti-dermatophytic activity. Seaweeds have been explored as a natural resource of compounds of interest due to their bioactivities. Although many studies report the interest and the application of seaweeds in various areas, from food or human health to the economy, these data mostly focus on raw extracts and not on specific compounds, such as seaweed pigments. Fungal infections of the skin, nails, and hair caused by dermatophytes are the most common fungal infections worldwide. These pathologies require long periods of topical and/or systemic treatment associated with adverse effects and increased antifungal resistance. So, this study had two objectives: the first was to isolate and characterize the pigments of the seaweeds Calliblepharis jubata and Fucus vesiculosus; the second was to assess their antifungal activity. The extraction of pigments was performed using a method of extraction by exhaustion, and the purification was achieved via column chromatography. Three techniques were used to characterize the pigments: thin-layer chromatography (TLC), UV–visible spectrophotometry, and Fourier-transform infrared spectroscopy (FTIR). The antifungal activity against the three most common dermatophytes, Trichophyton rubrum, Trichophyton mentagrophytes, and Microsporum canis, was evaluated using a microdilution methodology, following the EUCAST international standards. It was possible to observe that the extracts obtained from the seaweed C. jubata, corresponding to the purified pigment phycobiliprotein, and the crude extract (an enriched extract) showed antifungal activity against the three fungal agents of human skin infection. [ABSTRACT FROM AUTHOR]

Acetone exudates of 13 Thymus species were analyzed for their composition by gas chromatography/mass spectrometry (GC/MS) and thin-layer chromatography (TLC). The studied species are members of the section Hyphodromi (Thymus atticus, T. perinicus, T. striatus, T. zygioides and T. comptus) and section Serpyllum (T. longedentatus, T. longicaulis, T. pulegioides, T. moesiacus, T. albanus, T. jankae, T. stojanovii and T. sibthorpii). Some of the studied species are endemic. Triterpene acids (oleanolic and ursolic) were found as dominant compounds in the exudates. Isomers thymol and carvacrol were determined as the most common monoterpenes. All exudates were established to be rich in straight-chain alkane (hexacosane). TLC analysis was performed for the identification of flavonoid aglycones. Apigenin, luteolin, naringenin, taxifolin and eriodictyol were identified as the most common flavonoids in the profiles of the studied species. Methyl derivatives of apigenin were determined only in the exudates of the separate species. Exudate compounds of Bulgarian Thymus species are reported for the first time in the present study. Moreover, some endemic thyme species' phytochemical compositions are presented here for the first time. This is the first time that micromeric acid is reported in the Thymus genus. [ABSTRACT FROM AUTHOR]

AbstractBoswellia resin is an exudate from the cut bark of Boswellia trees. The main constituents of pharmacological interest are boswellic acids (pentacyclic triterpenoids), namely α-boswellic acid, β-boswellic acid, 3-O-acetyl-α-boswellic acid, 3-O-acetyl-β-boswellic acid, 11-keto-β-boswellic acid, and 3-O-acetyl-11-keto-β-boswellic acid. Nowadays, dietary supplements with Boswellia serrata extract are used in the treatment of inflammatory joint diseases. Additionally, the constituents of Boswellia resin have shown potential for the treatment of other chronic inflammatory diseases and various types of cancer. Separation methods including ultra/high-performance liquid chromatography, gas chromatography, thin layer chromatography, supercritical fluid chromatography, and capillary electrochromatography coupled with UV or MS detection have been used for the determination of boswellic acids in various matrices (mostly plant material and biological samples). This review aims to provide a comprehensive summary of these separation methods, offering a critical discussion of their strengths and limitations in the analysis of boswellic acids. The knowledge of various separation methods plays a pivotal role in the quality control of herbal dietary supplements and the monitoring of the metabolism and pharmacokinetics of their constituents. The approaches based on metabolomics and network pharmacology represent new ways of fingerprinting secondary metabolites in Boswellia resin increasing the comprehensiveness of the output of these methods resulting in safer dietary supplements. [ABSTRACT FROM AUTHOR]

Copyright of Folia Pharmaceutica Cassoviensia is the property of University of Veterinary Medicine & Pharmacy in Kosice and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Pluchea indica (L.) Less is traditionally utilized to treat postpartum women in Indonesia. The plant has many pharmacological properties, so that it can be further developed as herbal medicine. In that development process, plant authentication is needed to ensure the quality of raw materials. A simple microscopical and thin-layer chromatography (TLC) analysis might be a way to authenticate the plant, but it has never been reported. So, this study evaluates the microscopical and TLC analysis for P. indica authentication in standardized herbal medicines production. Plant microscopic observation, fluorescence analysis, and polyphenol screening were conducted. n-Hexane, ethyl acetate, and methanol extracts of plant organs were then analyzed by TLC. Here, we reported that in microscopical analysis the simplicia of P. indica contains trichomes and tannin-containing cells. In addition, chlorogenic acid as a marker was present in TLC analysis by ethyl acetate-water-formic acid-acetic acid (8.5:1.5:1:1, v/v). The results of this evaluation might provide additional information in the identification, authentication, and quality control of P. indica as a raw material for herbal medicine. [ABSTRACT FROM AUTHOR]

Background: Many traditional medicinal plants were studied for their phytochemical components. Dayak onions (Eleutherine bulbous (Mill.) Urb) is one of traditional medicinal plant in Indonesia. Analysis of the phytochemical compounds in the extract of the plant would help in determining various biological activities of the plant. Objective: This study was primarily aimed to identify the phytochemical profile of Dayak onions extract and its fractions. Methods: The Dayak onion bulbs were collected from Pancur Batu District, North Sumatra Province, Indonesia. Multiple solvents used to for extraction and analysis of phytochemical compound by chemical reactions, thin layer chromatography (TLC) profiling, and Fourier Transform Infrared Spectrophotometer (FTIR) profiling. Results: The phytochemical screening of Dayak onions ethanol extract showed it contained alkaloids, flavonoids, glycosides, tannins, and triterpenes/steroids. The n-hexane fraction contained flavonoids and triterpenes/steroids, while the ethyl acetate fraction contains flavonoids and glycosides. The water fraction contained alkaloids, flavonoids, glycosides and tannins. By TLC profiling, the bioactive compounds in ethanol extract of the Dayak onion contain steroids, tannins, flavonoids and alkaloids. The bioactive compound in ethyl acetate fraction contains steroids, tannins, triterpenes, flavonoids and glycosides. The bioactive compound in n-hexan fraction contains steroids. The bioactive compound in water fraction fraction contains steroids and tannins. The FTIR demonstrated the presence of C-H alkanes, =C-H alkenes (aliphatic), C-O alcohol, ether, esters and carboxy acid in the ethanol extract, en-hexan fractions and ethyl acetate fractions. Conclusion: The phytochemical qualitative profiling showed that Dayak onion bulb as a rich source of bioactive compounds and have medicinal potential as therapeutic agent. A higher content of bioactive compounds of Dayak onion bulbs found in the ethanol and ethyl acetate extracts. The FTIR demonstrated the presence of C-H alkanes, =C-H alkenes (aliphatic), C-O alcohol, ether, esters and carboxy acid in the ethanol extract, enhexan fractions and ethyl acetate fractions. [ABSTRACT FROM AUTHOR]

Shift labor, with hours outside of the regular diurnal work cycle, is used to facilitate round-the-clock emergency healthcare services. This impacts the circadian rhythm, which can potentially activate the pro-inflammatory responses of the immune system. This study aimed to find out the levels of pro-inflammatory markers in night shift healthcare workers and find risk factors associated with their increase. 303 participants (doctors, nurses, technicians, health care aids) were recruited with 169 participants nightshift and 134 dayshift workers. Pro-inflammatory markers Highly Sensitive C-Reactive Protein (hsCRP) and Total Leukocyte Count (TLC)] were estimated. Factors were compared by t test, Wilcoxon Rank Sum test and Chi square test. Risk factors for hsCRP elevation were identified by logistic regression analysis. Pro-inflammatory markers like hsCRP and TLC were significantly increased in night shift health workers in comparison to the day shift workers (hsCRP 0.30± 0.33 mg/dl vs 0.10± 0.09 mg/dl, TLC 8181.06± 1181.53/cu mm vs 7473.80± 1018.81/cu mm) respectively. Multivariate logistic regression analysis showed night shift work (OR 48.20 95% CI (4.99 -465.61), age (OR 1.13 95% CI (1.01-1.26)) and BMI (OR 1.18 95% CI (1.06-1.32)) as independent predictors of elevated hsCRP after adjusting for other risk factors. Hence, night-shift work is an independent risk factor for a rise in pro-inflammatory markers. These findings might aid health care workers and policymakers strategize methods to tackle the challenges through providing support programs, counselling sessions to avoid ailments and deliver health services in a better way. [ABSTRACT FROM AUTHOR]

Background: Artificial sweeteners (AS) are synthetic compounds extensively used in food and beverages industries due to its techno-functional role as alternatives to table sugar. Many studies report the adverse health effect on use of such compounds beyond its permitted limit. Hence, the aim of present study is to analyzed the AS contents in selected commonly consumed beverages and food products. Methods: High-Performance Liquid Chromatography and Thin Layer Chromatography methodology was used to carry out the analysis. Results: Concentration of Ace-K ranged from 7 to 14 mg/100 ml, sucralose from 83 to 93 mg/100 ml, and aspartame 11mg/100ml in beverages. In mouthwashes, saccharin ranged from 102 to 140 mg/100g. Among chocolates, saccharine was observed from 9 to 13 mg/100g. Chewing gums contained 9 to 193 mg/100 g of aspartame, 118mg/100g of Ace-K, and 82 to 155 mg/100g of sucralose. Conclusion: The data could help in public awareness as well as regulatory bodies in monitoring the levels of AS found in food products and beverages with officially permitted limits. [ABSTRACT FROM AUTHOR]

Land kale or Ipomoea reptans Poir is widely consumed by Indonesian people. Land kale plants can be used as natural antioxidants because they contain polyphenolic compounds, one of which is phenolic acid. This research was carried out to determine the antioxidant activity and isolate phenolic acid compounds contained in land kale plants (Ipomoea reptans Poir). The sample used was an ethanol extract of land kale. The total phenolics were determined using the Folin-Ciocalteu method. Phenolic acids were isolated using alkaline hydrolysis and acid hydrolysis and without hydrolysis methods. Separation of isolates was carried out using the TLC method. The structure was identified using UV-Vis spectrophotometry and LC-MS/MS. Antioxidant activity was measured using the DPPH method. The total phenolics of land kale ethanol extract were 71.2420 ± 0.0791 mg/g GAE. TLC showed that the HB, HA, and TH fractions contained caffeic acid and ferulic acid compounds. Separation of the (HB) fraction produced three isolates: B2 with a yellow color, B3 with a slightly yellowish color, and B4 which is colorless. B2 isolate was identified as potentially containing caffeic acid, while B3 isolate was indicated to potentially contain ferulic acid through analysis using a UV-Vis spectrophotometer. B4 isolate was thought to have a hydroxybenzoic acid framework after being determined using LC-MS/MS. The ethanol extract of land kale has strong antioxidant activity because it produces an IC50 value of 94.83 mg/L. [ABSTRACT FROM AUTHOR]

This study investigated the mosquito-repelling ability of folkloric indigenous plants by phytochemical extraction using three distinct methods. The phytochemical composition and antioxidant activities of the extracts were evaluated using thin-layer chromatography. The average powder weights of Citrus maxima (CM), Eleocharisdulcis plantaginea (EP), and Thespesia populnea (TP) were 154.33, 156.67, and 153.78 mg/g dry weight, respectively, and are substantially different from the other ten species (p=0.05). However, this technique did not affect the extract yield. The region of interest (ROI) values for the antioxidant activity of these three species were 328.9, 924.0, and 735.0, respectively. The repellent activities of the CM, TP, and EP extracts were significantly lower than those of DEET; however, the repellent activities of the mixed extract did not differ (p=0.05). This study found that indigenous plants commonly used in the region have mosquito-repellant and antioxidant properties. Combining the three extracts would yield the same activity as DEET, an ingredient used in commercial mosquito repellents. [ABSTRACT FROM AUTHOR]