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Artykuły w czasopismach na temat „Menthol TGA analysis”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Jia, Ying-Gang, Jian-She Hu, Dan Li, Qing-Bao Meng, and Xia Zhang. "Synthesis and phase behavior of chiral liquid crystalline polymeric networks derived from menthol." High Performance Polymers 24, no. 8 (2012): 673–82. http://dx.doi.org/10.1177/0954008312449843.

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The synthesis of new chiral monomer 4-(menthyloxyacetoxy- benzoyloxy)biphenyl-4′-(2-(undec-10-e noyloxy)ethoxy)benzoate (ML), crosslinking agent 4-(undec-10-enoyloxy)biphenyl-4′-(2-(undec-10-enoyloxy)ethoxy)benzoate (CA), and liquid crystal polymer networks (E1−E5) containing menthyl group is presented. Their chemical structures and phase behavior were characterized with Fourier transform infrared (FT-IR), proton nuclear magnetic resonance (1H-NMR), elemental analyses, polarizing optical microscopy, differential scanning calorimetry, thermogravimetric analysis (TGA), and X-ray diffraction. The

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Mahashabde, J. P., S. N. Patel, A. M. Patil, and J. P. Sonawane. "Synthesis and characterization of copolymer Poly [(Thiophene-2, 5-diyl)-co-para methoxy benzylidene] doped with Cobalt acetate using Oxidative polymerization." Research Journal of Chemistry and Environment 26, no. 1 (2021): 75–81. http://dx.doi.org/10.25303/2601rjce75081.

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A one pot oxidative polymerization technique is used to synthesize copolymer Poly [(thiophene-2, 5-diyl)-copara methoxy benzylidene]. In this technique we used catalyst POCl3 and 1, 4 dioxane solvent for copolymerization of para methoxy benzaldehyde with thiophene. One pot method takes around 24 hours. Doped copolymer was synthesized in presence of 0.2gm cobalt acetate. Catalyst is removed using ammonia. Products are obtained using menthol. UV–Vis, FTIR, 1HNMR, 13CNMR, XRD, FE-SEM, EDX, BET and TGA are used to analyze physical properties of undoped and doped copolymers. The polycrystalline pha

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3

Nowak, Izabela, Akmaral Issayeva, Marta Dąbrowska, et al. "Possibilities of Using Medicinal Plant Extracts and Salt-Containing Raw Materials from the Aral Region for Cosmetic Purposes." Molecules 27, no. 16 (2022): 5122. http://dx.doi.org/10.3390/molecules27165122.

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The aim of this work was to study the possibility of using medicinal plants in combination with salt-containing raw materials from the Aral Sea region for cosmetic purposes. The chemical and mineralogical compositions of salts occurring in this region were studied for pharmacological and cosmetic purposes. The salt-containing raw materials were studied by X-ray diffraction (XRD), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The microflora of saline-containing raw materials and flora of the Zhaksy-Klych lake were studied. Fifty-six plant species were identified, of w

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Nazarov, Ivan V., Danil P. Zarezin, Ivan A. Solomatov, et al. "Chiral Polymers from Norbornenes Based on Renewable Chemical Feedstocks." Polymers 14, no. 24 (2022): 5453. http://dx.doi.org/10.3390/polym14245453.

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Optically active polymers are of great interest as materials for dense enantioselective membranes, as well as chiral stationary phases for gas and liquid chromatography. Combining the versatility of norbornene chemistry and the advantages of chiral natural terpenes in one molecule will open up a facile route toward the synthesis of diverse optically active polymers. Herein, we prepared a set of new chiral monomers from cis-5-norbornene-2,3-dicarboxylic anhydride and chiral alcohols of various natures. Alcohols based on cyclic terpenes ((-)-menthol, (-)-borneol and pinanol), as well as commerci

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5

Buleandra, Mihaela, Eliza Oprea, Dana Elena Popa, et al. "Comparative Chemical Analysis of Mentha piperita and M. spicata and a Fast Assessment of Commercial Peppermint Teas." Natural Product Communications 11, no. 4 (2016): 1934578X1601100. http://dx.doi.org/10.1177/1934578x1601100433.

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The hydrodistilled essential oils and volatile compounds (by static headspaces technique) of Mentha piperita L. and M. spicata L. were characterized by GC-MS. Headspace analysis of Mentha piperita revealed the existence of menthone (25.4%), 1,8-cineole (17.7%) and menthol (12.1%) as the main components, while the essential oil contained high amounts of menthol (46.8%) and menthone (25.6%). By contrast, headspace analysis of M spicata showed a high content of limonene (37.0%) together with carvone (13.0%), β-pinene (10.4%) and α-pinene (9.8%), while the essential oil was reach in carvone (51.7%

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6

Daryadar, Mahsa, Juletta Alexanyan, Stepan Mayrapetyan, Khachatur Mayrapetyan, Anahit Tovmasyan, and Anna Tadevosyan. "Estimating peppermint essential oil levels: water-stream and classical hydroponic systems." Functional Foods in Health and Disease 13, no. 7 (2023): 361. http://dx.doi.org/10.31989/ffhd.v13i7.1123.

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Background: The leaves of peppermint and the essential oil received from them are used in medicine. The chemical content of essential oil is quite complex. It contains about 30 terpene compounds. The content of essential oil in flowers is 4-6%; in leaves – 2.4-2.8%, and in stems 0.3%. The main components that define the quality of essential oils are menthol, menthone, limonene, menthofuran, and isomenthone. Peppermint is used in the form of tea, tincture, extract, and salves. It has a regulating influence on the heart and circulatory system. It calms the heartbeat and supports the decrease of

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7

Feng, Tao, Fangfang Liu, Xu Wang, et al. "Evaluation of Different Analysis Methods for the Encapsulation Efficiency of Amylose Inclusion Compound." International Journal of Polymer Science 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/645916.

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Recently amylose has drawn much attention as a potential vehicle for the nanoencapsulation of different flavor molecules, and the encapsulation efficiency of the complex is an important index for the evaluation of its embedding effect. In this study, three different methods for assessing encapsulation efficiency of amylose-flavor complexes were compared. We chose heptanol and menthone as the flavor molecules, as both of them exhibit a typical odor. The complexes were prepared by the melting method, and their structures were characterized by XRD. In addition, the encapsulation efficiency was de

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8

Xie, Wan-cui, Jian Tang, Xiao-hong Gu, Chang-rong Luo, and Guang-yu Wang. "Thermal decomposition study of menthyl-glycoside by TGA/SDTA, DSC and simultaneous Py-GC–MS analysis." Journal of Analytical and Applied Pyrolysis 78, no. 1 (2007): 180–84. http://dx.doi.org/10.1016/j.jaap.2006.06.007.

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9

Mora-Flórez, Laura Sofía, Daniel Cabrera-Rodríguez, and María Hernández-Carrión. "Encapsulation of Menthol and Luteolin Using Hydrocolloids as Wall Material to Formulate Instant Aromatic Beverages." Foods 12, no. 10 (2023): 2080. http://dx.doi.org/10.3390/foods12102080.

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Aromatic plants represent about 0.7% of all medicinal plants. The most common are peppermint (main active ingredient: menthol) and chamomile (main active ingredient: luteolin), which are usually consumed in “tea bags” to make infusions or herbal teas. In this study, menthol and luteolin encapsulates using different hydrocolloids were obtained to replace the conventional preparation of these beverages. Encapsulation was carried out by feeding an infusion of peppermint and chamomile (83% aqueous phase = 75% water − 8% herbs in equal parts, and 17% dissolved solids = wall material in 2:1 ratio) i

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10

Santana-Mayor, Álvaro, Giovanni D’Orazio, Miguel Ángel Rodríguez-Delgado, and Bárbara Socas-Rodríguez. "Natural Eutectic Solvent-Based Temperature-Controlled Liquid–Liquid Microextraction and Nano-Liquid Chromatography for the Analysis of Herbal Aqueous Samples." Foods 14, no. 1 (2024): 28. https://doi.org/10.3390/foods14010028.

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In this work, two novel (-)-menthol-based hydrophobic natural eutectic solvents with vanillin and cinnamic acid were prepared and applied as extraction solvents. In this regard, 12 endocrine disruptors, including phenol, 2,4-dimethylphenol, 2,3,6-trimethylphenol, 4-tert-butylphenol, 4-sec-butylphenol, 4-tert-amylphenol, 4-n-hexylphenol, 4-tert-octylphenol, 4-n-heptylphenol, 4-n-octylphenol, and 4-n-nonylphenol and bisphenol A, were studied in a green tea drink. A temperature-controlled liquid–liquid microextraction was used as the extraction method, and nano-liquid chromatography–ultraviolet d

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11

Baluja, Shipra, and Nikunj Kachhadia. "Thermal Analysis of some Imidazolinone Derivatives." International Letters of Chemistry, Physics and Astronomy 44 (January 14, 2015): 124–29. http://dx.doi.org/10.56431/p-7109v3.

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Thermal analysis of some imidazolinone derivatives derived from 1, N-phenyl-3-p-nitrophenyl-4-formyl pyrazole, have been carried out by TGA technique. From these thermograms, various kinetic parameters such as order of degradation (n), energy of activation (E), frequency factor (A) and entropy change (∆S) have been evaluated. Further, thermal stability of imidazolinone derivatives have been determined, which is found to depend on the type of substituent present in the compounds.

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12

Hubert-Schöler, Charlotte, Saskia Tsiaparas, Katharina Luhmer, et al. "Essential Oil Composition and Physiology of Three Mentha Genotypes Under Shaded Field Conditions." Plants 13, no. 22 (2024): 3155. http://dx.doi.org/10.3390/plants13223155.

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Mentha spp. are commonly used for the production of tea and for the extraction of essential oils (EOs). The key factor of mint quality is the content and composition of the EO. Health-promoting compounds such as menthol are desirable, whereas the presence of potentially health-damaging compounds such as menthofuran should be avoided. This study examines the effect of shading on the EO content and composition of three Mentha genotypes (Mentha × piperita ‘Multimentha’, Mentha × piperita ‘Fränkische Blaue’ and Mentha rotundifolia ‘Apfelminze’). The Mentha genotypes were cultivated in field trials

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13

Brożyna, Malwina, Justyna Paleczny, Weronika Kozłowska, et al. "The Antimicrobial and Antibiofilm In Vitro Activity of Liquid and Vapour Phases of Selected Essential Oils against Staphylococcus aureus." Pathogens 10, no. 9 (2021): 1207. http://dx.doi.org/10.3390/pathogens10091207.

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The high resistance of staphylococcal biofilm against antibiotics and developing resistance against antiseptics induces a search for novel antimicrobial compounds. Due to acknowledged and/or alleged antimicrobial activity of EOs, their application seems to be a promising direction to follow. Nevertheless, the high complexity of EOs composition and differences in laboratory protocols of the antimicrobial activity assessment hinders the exact estimation of EOs effectiveness. To overcome these disadvantages, in the present work we analysed the effectiveness of volatile and liquid forms of seven E

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Devyatkina, N. M., N. O. Bobrova, and E. M. Vazhnichaya. "THE EFFECT OF ESSENTIAL OILS ON MICROORGANISMS CAUSING CARIES AND PERIODONTITIS." Актуальні проблеми сучасної медицини: Вісник Української медичної стоматологічної академії 20, no. 2 (2020): 253–59. http://dx.doi.org/10.31718/2077-1096.20.2.253.

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The oral cavity contains a large number of bacteria, some of which are involved in the development of caries and periodontitis (S. mutans, S. sobrinus, Lactobacilli spp, P. intermedia, P. gingivalis, and T. forythus). The disadvantages of existing antiseptics used in dentistry necessitate the study of antibacterial properties of herbal medicines, and, in particular, of essential oils. The aim of this review is to provide the analysis of literature sources from PubMed and Google Scholar databases related to the effects of essential oils of cloves, mint, thyme, eucalyptus, tea tree and their com

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Bhogayta, Jay, Taslimahemad Khatri, Vijay Ram, and Pragnesh Dave. "Study of Anticonvulsant Clobazam Drug by Sophisticated Instrumentation." International Letters of Chemistry, Physics and Astronomy 29 (March 3, 2014): 1–13. http://dx.doi.org/10.56431/p-9w0o21.

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Clobazam (7-Chloro-1-methyl-5-phenyl-1,5-benzodiazepine-2,4(3H)-dione) an anticonvulsant drug used since 1984, with molecular formula C16H13ClN2O2 and molecular mass 300, was characterized with sophisticated instruments like FTIR, UV-NIR, GC-MS, TGA-DTA-DSC and Nano particle size analyzer with zeta potential. The compound was confirmed with the help of GC-MS and the mass of sample was found aggregate with the standard values and mass spectra compare with NIST and WELEY library data. The UV-NIR analysis showed that the λmax was 231 nm with methanol as a diluent. FTIR analysis of the Clobazam ga

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Hunagund, Shirajahammad M., Pradeep Chavan, Vani R. Desai, L. R. Naik, Jagadish S. Kadadevarmath, and Ashok H. Sidarai. "Influence of Fe<sup>3+</sup> Ion Substitution on Thermal and Dielectric Properties of Titanium Dioxide." International Letters of Chemistry, Physics and Astronomy 67 (June 30, 2016): 9–13. http://dx.doi.org/10.56431/p-9z005n.

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Thermal and dielectric characteristics of Fe2O3 doped TiO2 (FDT) nanopowder is investigated. Formation of FDT was prepared using the formula [1-x] TiO2 + [x] Fe2O3 by solid state reaction method. The Surface morphology was studied using atomic force microscopy (AFM) technique; it reveals the average particle size in the range of 180 to 200nm. FT-IR analysis reveals weak transmittance bands between 1020 to 1650 cm-1 and 2800 to 3500 cm-1 which shows a gradual decrease in peak intensities with an increase of Fe concentration. Thermal stability was assessed by Thermogravimetric analysis (TGA). Re

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Lytle, Aidan, Neil Pritchard, Alicia Aarnio, and Thomas Weighill. "Toplogical Data Analysis Detects and Classifies Sunspots (Student Abstract)." Proceedings of the AAAI Conference on Artificial Intelligence 37, no. 13 (2023): 16274–75. http://dx.doi.org/10.1609/aaai.v37i13.26997.

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In our technology-dependent modern world, it is imperative to monitor the Sun for space weather threats to critical infrastructure. Topological data analysis (TDA) is a new set of mathematical techniques used in data analysis and machine learning. We demonstrate that TDA can robustly detect and classify solar surface and coronal activity. This technique is a promising step toward future application in predictive space weather modeling.

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More, Paresh S., and Bipin H. Mehta. "Structural Elucidation of Transition Metal Complexes of the Schiff Base of 5-Nitro Salicylaldehyde and Anthranalic Acid Using <sup>1</sup>H NMR, Thermal Analysis, Diffused Reflectance and ESR Data." International Letters of Chemistry, Physics and Astronomy 48 (March 25, 2015): 1–13. http://dx.doi.org/10.56431/p-766m1y.

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Transition metal complexes of the type ML.nH2O [Where M= Co(II),Ni(II),Cu(II) and Zn(II), L= Schiff base of 5 nitro salicylaldehyde and anthranalic acid, n= 0,1 …..] were characterized by using 1H NMR,TGA, Diffused refluctance and ESR spectroscopy. On the basis of above studies Co(II), Ni(II) shows tetrahedral structure, Cu(II) shows binuclear structure and Zn(II) shows square planar structure.

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Marques, C., A. T. Pereira, M. Marques, M. J. Soares, C. Roque, and A. Macedo. "Confirmatory factor analysis of the eating attitudes test short version in a sample of Portuguese women." European Psychiatry 41, S1 (2017): S556. http://dx.doi.org/10.1016/j.eurpsy.2017.01.797.

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IntroductionThe Eating Attitudes Test-40 (EAT-40) is a valid index of symptoms frequently observed in eating disorders. The EAT-40 was adapted and validated for the Portuguese population. Thereafter a short-version composed of 25 items selected from the exploratory factor analysis (EAT-25) was developed. Apart from the total score, the TAA-25 evaluates three dimensions: Diet, Bulimic Behaviours and Social Pressure to Eat.ObjectiveTo examine the factor structure of the EAT-25 using confirmatory factor analysis (CFA) in a sample of Portuguese women.MethodsThe sample was composed of 433 women (me

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Rajakumar, P. R., and R. Nanthini. "Mechanical, Thermal and Morphological Behaviours of Polybutylene Terephthalate/Polycarbonate Blend Nanocomposites." International Letters of Chemistry, Physics and Astronomy 9 (March 3, 2013): 15–36. http://dx.doi.org/10.56431/p-rw24fb.

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Polybutylene Terephthalate (PBT)/Polycarbonate (PC) nanocomposite blend was fabricated using melt blending technique in a twin extruder. The blend composition was optimized at PBT-PC weight ratio of 80-20. The effect of incorporation of various organically modified Montmorillonite (OMMT) and naturally occurring sodium Montmorillonite (MMT) on the mechanical, thermal and morphological properties of the nanocomposites blend has been investigated. It was observed that the Izod impact strength, tensile strength and flexural strength demonstrated a significant increase with the increase in clay loa

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Dhaduk, Bhavin B., Chirag B. Patel, and Parsotam H. Parsania. "Synthesis, Thermal and Crystallographic Analysis of 1,1’-diylbis(2-Methyl-4-Phenylene)bis(2-Nitrobenzoate)Cyclohexane." International Letters of Chemistry, Physics and Astronomy 45 (January 20, 2015): 32–41. http://dx.doi.org/10.56431/p-15t0a2.

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The crystal structure of 1,1’-diylbis (2-methyl-4-phenylene) bis (2-nitrobenzoate) cyclohexane (NBM-2) has been determined by X-ray crystallographic technique. Single crystals were grown by slow evaporation technique. NBM-2 crystallized in the triclinic crystal lattice having space group P-1. Both the phenyl rings are perpendicular to the cyclohexane ring having chair conformation. NBM-2 showed both inter-and intramolecular interactions. The structure of NBM-2 has also been supported by FT-IR, 1HNMR, 13C NMR, MS techniques. The thermal behaviour of NBM-2 were studied by TGA and DSC techniques

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Dardennes, R., G. Berdeaux, A. Lafuma, and F. Fagnani. "Comparison of the cost-effectiveness of milnacipran (a SNRI) with TCAs and SSRIs: a modeling approach." European Psychiatry 14, no. 3 (1999): 152–62. http://dx.doi.org/10.1016/s0924-9338(99)80734-2.

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SummaryA simulation model based on the theory of clinical decision analysis was used to compare outcomes and costs when treating patients with major depressive episodes using either a selective serotonin re-uptake inhibitor (SSRI) or a tricyclic antidepressant (TCA), in comparison with milnacipran (a serotonin), and a norepinephrine re-uptake inhibitor (SNRI). The clinical data used were taken from published meta-analyses. This analysis supports: (1) a comparable efficacy of milnacipran and TCA with a better tolerance; and, (2) an advantage of milnacipran over SSRI for efficacy with a comparab

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Iskandar, Suhendra. "Analysis of the Impact of Black Tea Waste on The Fertility Quality of Rainbow Chili Plants (Capsicum annum L.)." Jurnal Pijar Mipa 19, no. 2 (2024): 326–30. http://dx.doi.org/10.29303/jpm.v19i2.6473.

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Black tea is a drink commonly consumed in Indonesia, so it is not uncommon for dregs to be found to be wasteful. Waste is a serious problem that, if not handled properly, will have specific environmental impacts. Many people use tea waste as fertilizer without knowing the danger it causes to plants without further processing. This research aimed to analyze the effects of black tea waste on the fertility quality of rainbow chili plants (Capsicum annum L.). The type of research is qualitative research. The method used in this research is qualitative observation to observe the maximum height, the

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Manne, Ravindra Gandhi, M. Ashok Kumar, V. Nikill Murthy, N. Karthikeyan, and M. Johnson. "Development and Assessment of Polyester Reinforced with Sansevieria Cylindrica/Zawa Flour Composites." International Letters of Chemistry, Physics and Astronomy 51 (May 15, 2015): 144–54. http://dx.doi.org/10.56431/p-zgzttm.

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This paper zero in on preparation of hybrid composites in which Polyester matrix filled with Sanseveria cylindrica fiber(SCF) and Zawa flour. SCF fiber was taken 10% volume constantly in all the samples. Camera ready samples were prepared using hand layup technique in which filler constituent proportions were taken by using rule of hybrid mixture (RoHM). The mail aim of the composites is to increase the tensile flexural, and impact strengths, TGA, DSC results by incorporating the filler. It was observed that, tensile strength was linearly increased up to 4wt.% zawa after that sudden falling wa

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Bhesaniya, Kapil, Ashish Patel, and Shipra Baluja. "Determination of Kinetic Parameters of Decomposition of Tetrahydropyrimidine Derivatives." International Letters of Chemistry, Physics and Astronomy 18 (September 28, 2013): 23–32. http://dx.doi.org/10.56431/p-zb53w1.

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Some new tetrahydropyrimidine derivatives have been synthesized and their structural determination was done by IR, NMR and mass spectral data. Thermal analysis of these synthesized dihydropyrimidinthiones has been carried out by TGA and DSC techniques. From the thermograms, various kinetic parameters such as order of degradation (n), energy of activation (E), frequency factor (A) and entropy change (ΔS) have been evaluated. Further, thermal stability of tetrahydropyrimidine have been determined which is found to depend on the type of substituent present in the compounds.

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Thanh, Nguyen Hong, Roman O. Olekhnovich, Mayya V. Uspenskaya, Vera E. Sitnikova, and Collins Ngoe Elangwe. "EFFECT OF POLYMER RATIO ON THERMAL PROPERTIES OF POLYHYDROXYBUTYRATE/POLYHYDROXYHEXANOATE." Bulletin of the Saint Petersburg State Institute of Technology (Technical University) 66 (2023): 27–30. http://dx.doi.org/10.36807/1998-9849-2023-66-92-27-30.

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In this study, a PHB nanofiber mat with various concentrations of PHH was successfully prepared by the electrospinning method. The morphology of the PHB nanofibers was observed by the microscope. Fourier transform infrared spectroscopy (FTIR) was used to evaluate the characteristic groups for the PHB sample with various concentrations of PHH in pellet and nanofibers mat form. DSC analysis was used to investigate the change in melting point and the crystallization temperature of PHB with various concentrations of PHH. TG and DTG were used to test the decomposition temperature as well as the mas

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Ankit, Gupta. "Exploring the optical and structural properties of chromium (Cr)-doped polyaniline." i-manager's Journal on Material Science 11, no. 3 (2023): 1. http://dx.doi.org/10.26634/jms.11.3.20523.

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In this present work, a Cr-Doped Polyaniline [Cr-PANI-CNT] nanocomposite using the chemical polymerization method is synthesized, where ammonium persulphate was used as an oxidant in an acidic (HCl) medium. The optical properties of both CNTs and PANI with Cr were investigated using Fourier Transform Infrared Spectroscopy (FTIR), and the morphological study of the nanocomposite was performed with the help of FESEM and TEM analysis. Expanding on this, our investigation into the Cr-Doped Polyaniline [Cr-PANI-CNT] nanocomposite's optical properties via FTIR included a detailed examination of the

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Salvi, Giovanni, Morven Leese, and Mike Slade. "Routine use of mental health outcome assessments: choosing the measure." British Journal of Psychiatry 186, no. 2 (2005): 146–52. http://dx.doi.org/10.1192/bjp.186.2.146.

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BackgroundThere is little consensus about which outcome measures to use in mental healthcare.AimsTo investigate the relationship between the items in four staff-rated measures recommended for routine use.MethodCorrelation analysis of total scores and factor analysis using combined data from the Health of the Nation Outcome Scales (HoNOS). The Camberwell Assessment of Need Short Appraisal Schedule (CANSAS), the Threshold Assessment Grid (TAG) and the Global Assessment of Functioning (GAF) were performed. Procrustes analysis on factors and scales, and Ward's cluster analysis to group the items,

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Sevil, Hulya, Fehim Can Sevil, Mehmet Tort, et al. "Detection of unexpected aortic aneurysms by using computed tomography in emergency department: A retrospective analysis of more than 10.000 patients." Turkish Journal of Vascular Surgery 32, no. 2 (2023): 100–106. http://dx.doi.org/10.9739/tjvs.2023.03.09.

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Aim: This study aims to determine the prevalence of aortic aneurysms (AA) on computed tomography (CT) in the emergency department. Material and Methods: A total of 10219 CT images were retrospectively analyzed (7610 thoracic, 6148 abdominal CT). A thoracic aortic diameter greater than 50 mm, an abdominal aortic diameter greater than 30 mm, or an aortic diameter greater than 50% of normal were considered AA. The baseline demographic and clinical characteristics of patients with thoracic AA (TAA) and abdominal AA (AAA) were compared to those without AA. Results: TAA was found in 990 (13%) of 761

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Xu, Hua, Alexandra J. Fiocco, Xiaohua Liu, Tao Wang, Guanjun Li, and Shifu Xiao. "Association between tea consumption and cognitive function in cognitively healthy older adults and older adults with mild cognitive impairment." General Psychiatry 34, no. 4 (2021): e100512. http://dx.doi.org/10.1136/gpsych-2021-100512.

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BackgroundProspective studies suggest that tea consumption may decrease the risk for cognitive impairment in late life. However, little research has examined the association between tea consumption and cognitive performance across multiple domains. In addition, no research has examined the benefit of tea consumption on cognitive performance among older adults with existing impairment.AimsThe current study examined the association between tea consumption and performance on tasks of global cognitive function, episodic memory and executive function in cognitively healthy (CH) older adults and old

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Syafitri, Nurlaila, Veni Rori Setiawati, and Jenri Parlinggoman Hutasoit. "Effect of cinnamon (Cinnamomum bermanni) addition on antioxidant activity and organoleptic properties of moringa leaf tea (Moringa oleifera)." Jurnal Pijar Mipa 18, no. 5 (2023): 771–76. http://dx.doi.org/10.29303/jpm.v18i5.5489.

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The study aims to determine the organoleptic characteristics and antioxidant activity of the tea leaves of moringa that are added to moringa using the DPPH method. (1-difenil-2- pikrildihidrazil). This type of study is an experimental study with variations in the addition of moringa of 20 g, 30 g, 40 g, and 50 g on each treatment. Data analysis is carried out using ANOVA variance analysis at the 5% level using the SPSS software application. If there is a real effect, continue with the further Duncan test. The study results show that adding peppermint extract positively affects the tea leaves'

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Ma, Ya-Hui, Jia-Huan Wu, Wei Xu, et al. "Associations of Green Tea Consumption and Cerebrospinal Fluid Biomarkers of Alzheimer’s Disease Pathology in Cognitively Intact Older Adults: The CABLE Study." Journal of Alzheimer's Disease 77, no. 1 (2020): 411–21. http://dx.doi.org/10.3233/jad-200410.

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Background: Green tea has been widely recognized in ameliorating cognitive impairment and Alzheimer’s disease (AD), especially the progression of cognitive dysfunction. But the underlying mechanism is still unclear. Objective: This study was designed to determine the role of green tea consumption in the association with cerebrospinal fluid (CSF) biomarkers of AD pathology and to ascertain whether specific population backgrounds showed the differences toward these relationships. Methods: Multivariate linear models analyzed the available data on CSF biomarkers and frequency of green tea consumpt

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Basha, U. Mahaboob, D. Mohana Krishnudu, P. Hussain, K. Manohar Reddy, N. Karthikeyan, and M. Ashok Kumar. "Synthesis and Characterization and Properties Comparison of Epoxy Filled Filler Millet (Ragi) Filler and Treated <i>Sacharun offinarum</i> (Sugar Cane) Fiber Reinforced Composites." International Letters of Chemistry, Physics and Astronomy 51 (May 15, 2015): 41–46. http://dx.doi.org/10.56431/p-t46nj3.

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In the current work epoxy resin is chosen as matrix, treated Sacharum offinarum ( SugarCane) fiber, filler millet(Ragi) filler is chosen as reinforcement. Room temperature cured Epoxy System filled with Sacharum offinarum fiber and filler millet (Ragi) filler is synthesised by mechanical shear mixer, then kept in a Ultra sonic Solicitor for better dispersion of filler millet (Ragi) filler in the matrix. Different weights of modified filler millet(Ragi) filler (1,2,3,4,5 gm wt) has been incorporated into the Epoxy matrix in order to study the variation of Mechanical and Thermal properties.Mecha

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Bérard, A., J. P. Zhao, and O. Sheehy. "Antidepressant use During Pregnancy and the Risk of Major Congenital Malformations in a Cohort of Depressed Pregnant Women: A Re-analysis of the Quebec Pregnancy Cohort." European Psychiatry 41, S1 (2017): S155. http://dx.doi.org/10.1016/j.eurpsy.2017.01.2019.

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ObjectiveTo quantify the association between first-trimester antidepressant exposure and the risk of major congenital malformations (MCM) in a cohort of depressed women.MethodData were obtained from the Quebec pregnancy cohort. All pregnancies with a diagnosis of depression or anxiety, or exposed to antidepressants in the 12 months before pregnancy, and ending with a live-born singleton were included. Antidepressant classes (selective serotonin reuptake inhibitors (SSRI), serotonin norepinephrine reuptake inhibitors (SNRI), tricyclic antidepressants (TCA), and other antidepressants), and types

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Patel, Bharat, Pravin Ram, Taslimahemad Khatri, Vijay Ram, and Pragnesh Dave. "Study of Anticoagulant Dabigatran by Analytical Instrumentation." International Letters of Chemistry, Physics and Astronomy 30 (March 12, 2014): 233–42. http://dx.doi.org/10.56431/p-60gwoj.

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Dabigatran with IUPAC name 3-({2-[(4-Carbamimidoyl-phenylamino)-methyl]-1-methyl-1H-benzoimidazole-5-carbonyl}-pyridin-2-yl-amino)-propionic acid, which can be used to prevent strokes in those with atrial fibrillation due to causes other than heart valve disease, and at least one additional risk factor for stroke (congestive heart failure, hypertension, age, diabetes, and prior stroke), with molecular formula C34H41N7H5 was studied in detail for functional group analysis with FTIR, characteristic absorbance by UV-NIR, thermal behavior by TGA-DTA-DSC, particle size and stability of the molecule

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Heggy, Alaa, Aisha Masoumi, Maryam Al-Yafei, Fatima Al-Bader, Tamara Al-Abdi, and Zumin Shi. "Habitual Tea and Coffee Consumption and Mean Reaction Time Among Qatari Adults." Journal of Alzheimer's Disease 84, no. 2 (2021): 767–76. http://dx.doi.org/10.3233/jad-215130.

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Background: Tea and coffee consumption is associated with cognitive function in some studies. Objective: We aimed to identify tea and coffee drinking patterns and their association with mean reaction time among Qatari adults. Method: The study included 1,000 adults aged 20 years and above attending the Qatar Biobank Study (QBB). Habitual tea and coffee consumption during the previous year was assessed by questionnaire. Tea and coffee drinking patterns were identified using factor analysis. In a computer-based self-administered touch screens test, mean reaction time (MRT) was used as an indicat

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Voisey, J., C. D. Swagell, I. P. Hughes, B. R. Lawford, R. M. Young, and C. P. Morris. "Analysis of HapMap tag-SNPs in dysbindin (DTNBP1) reveals evidence of consistent association with schizophrenia." European Psychiatry 25, no. 6 (2010): 314–19. http://dx.doi.org/10.1016/j.eurpsy.2009.11.011.

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AbstractDystrobrevin binding protein 1 (DTNBP1), or dysbindin, is thought to be critical in regulating the glutamatergic system. While the dopamine pathway is known to be important in the aetiology of schizophrenia, it seems likely that glutamatergic dysfunction can lead to the development of schizophrenia. DTNBP1 is widely expressed in brain, levels are reduced in brains of schizophrenia patients and a DTNBP1 polymorphism has been associated with reduced brain expression. Despite numerous genetic studies no DTNBP1 polymorphism has been strongly implicated in schizophrenia aetiology. Using a h

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Nagalakshmi, T. V., K. A. Emmanuel, Ch Suresh Babu, Ch Chakrapani, and P. Paul Divakar. "Preparation of Mesoporous Activated Carbon from Jackfruit PPI-1 Waste and Development of Different Surface Functional Groups." International Letters of Chemistry, Physics and Astronomy 54 (July 3, 2015): 189–200. http://dx.doi.org/10.56431/p-957378.

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Jackfruit PPI-1 variety was selected as source of lignocellulose material. Its rind and pulp waste was used as precursor for preparation of activated carbon. K2CO3 was selected as activating agent to prepare activated carbon. Various carbons were prepared by changing the impregnation ratio (IR) at different temperatures. Activated carbon prepared at 600°C and at IR1 had good BET surface area (987m2 g-1) and yield (61.97%). In order to introduce different functional groups, this carbon was divided into two parts. One part was subjected to liquid phase oxidation with 0.1N HNO3 and the other part

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Reddy, G., M. Ashok Kumar, and Jarugala Jayaramudu. "Biodegradable <i>Sansevieria cylindrica</i> Leaves Fiber/Tamarind Fruit Fiber Based Polymer Hybrid Composites on Characterization." International Letters of Chemistry, Physics and Astronomy 39 (October 2, 2014): 116–28. http://dx.doi.org/10.56431/p-1ohqvf.

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This paper deals with the preparation and characterization of epoxy tamarind fruit (Tf) and Sansevieria cylindrica (Sc) hybrid composites containing fiber 0:20, 5:15, 10:10, 15:5 and 20:0 of (Tf:Sc) combinations loading. Sansevieria cylindrica leaves were used in this paper for extracting fiber out of it and in the similar manner ripen Tamarind fruit was used to extract fiber. Two different fibers viz. tamarind fruit/ Sansevieria cylindrica fibers were loaded into the epoxy system to develop the hybrid composites. The tensile and flexural properties of the resulting 20 wt. % loading of Tf/Sc/e

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Carlson, Cynthia. "The damaged identity tag: A prematurely terminated analysis of a latency boy." Journal of Child Psychotherapy 19, no. 1 (1993): 95–116. http://dx.doi.org/10.1080/00754179308259383.

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Hossain, Mohammad Abul, Md Mahbbat Ali, and Tajmeri Selima Akhter Islam. "Comparative Adsorption of Methylene Blue on Different Low Cost Adsorbents by Continuous Column Process." International Letters of Chemistry, Physics and Astronomy 77 (January 25, 2018): 26–34. http://dx.doi.org/10.56431/p-i944in.

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Dyes are commonly found in the effluents of many industries. The effectiveness of adsorption for the removal of dye from wastewaters has been made it an ideal alternative to other expensive treatment methods. Continuous column adsorption is more affective than batch adsorption. A comparative column adsorption study was performed using three different low cost adsorbents for the removal of methylene blue from synthetic wastewater. Sand was collected from Cox’s Bazar, and sugarcane bagasse and used black tea leaves were locally prepared in laboratory. Three columns were designed for different ad

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Alonso Tena, Beatriz, and Amparo Calatayud Salom. "Impact of the program for the prevention of obesity and eating disorders entitled “everybody has a body” in educational centers in Spain. Analysis and proposals/ Impacto del programa de prevención de TCA y obesidad “everybody has a body” en centros educativos en España. Análisis y propuestas." Revista Mexicana de Trastornos Alimentarios/Mexican Journal of Eating Disorders 13, no. 1 (2023): 39–57. http://dx.doi.org/10.22201/fesi.20071523e.2023.1.765.

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Este artículo tiene como objetivo presentar el programa “Everybody has a body” para la prevención de trastornos de la conducta alimentaria (TCA) y obesidad en población preadolescente, que se ha impartido en varias escuelas de España durante el año 2021, contando con una muestra compuesta por 179 preadolescentes de entre 10 y 12 años. Este programa, elaborado por las investigadoras, tiene un carácter innovador, puesto que integra la prevención de los TCA y la obesidad, desde un enfoque que fomenta un estilo de vida saludable, a través del desarrollo de una conciencia crítica con los cánones de

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Voisey, J., C. D. Swagell, I. P. Hughes, B. R. Lawford, R. M. Young, and C. P. Morris. "HapMap tag-SNP analysis confirms a role for COMT in schizophrenia risk and reveals a novel association." European Psychiatry 27, no. 5 (2012): 372–76. http://dx.doi.org/10.1016/j.eurpsy.2010.08.004.

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AbstractCatechol-O-methyl transferase (COMT) encodes an enzyme involved in the metabolism of dopamine and maps to a commonly deleted region that increases schizophrenia risk. A non-synonymous polymorphism (rs4680) in COMT has been previously found to be associated with schizophrenia and results in altered activity levels of COMT. Using a haplotype block-based gene-tagging approach we conducted an association study of seven COMT single nucleotide polymorphisms (SNPs) in 160 patients with a DSM-IV diagnosis of schizophrenia and 250 controls in an Australian population. Two polymorphisms includin

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Purvine, Emilie, Davis Brown, Brett Jefferson, et al. "Experimental Observations of the Topology of Convolutional Neural Network Activations." Proceedings of the AAAI Conference on Artificial Intelligence 37, no. 8 (2023): 9470–79. http://dx.doi.org/10.1609/aaai.v37i8.26134.

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Topological data analysis (TDA) is a branch of computational mathematics, bridging algebraic topology and data science, that provides compact, noise-robust representations of complex structures. Deep neural networks (DNNs) learn millions of parameters associated with a series of transformations defined by the model architecture resulting in high-dimensional, difficult to interpret internal representations of input data. As DNNs become more ubiquitous across multiple sectors of our society, there is increasing recognition that mathematical methods are needed to aid analysts, researchers, and pr

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Kong, Dexu, Anping Zhang, and Yang Li. "Learning Persistent Community Structures in Dynamic Networks via Topological Data Analysis." Proceedings of the AAAI Conference on Artificial Intelligence 38, no. 8 (2024): 8617–26. http://dx.doi.org/10.1609/aaai.v38i8.28706.

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Dynamic community detection methods often lack effective mechanisms to ensure temporal consistency, hindering the analysis of network evolution. In this paper, we propose a novel deep graph clustering framework with temporal consistency regularization on inter-community structures, inspired by the concept of minimal network topological changes within short intervals. Specifically, to address the representation collapse problem, we first introduce MFC, a matrix factorization-based deep graph clustering algorithm that preserves node embedding. Based on static clustering results, we construct pro

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Jaradat, Nidal, Mohammed Hawash, Mohammad Qadi, et al. "Chemical Markers and Pharmacological Characters of Pelargonium graveolens Essential Oil from Palestine." Molecules 27, no. 17 (2022): 5721. http://dx.doi.org/10.3390/molecules27175721.

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Pelargonium graveolens leaves are widely used in traditional medicine for relieving some cardiovascular, dental, gastrointestinal, and respiratory disorders. They are also used as food and tea additives in Palestine and many other countries. Consequently, this investigation aimed to describe the chemical markers, cytotoxic, antioxidant, antimicrobial, metabolic, and cyclooxygenase (COX) enzymes inhibitory characteristics of P. graveolens essential oil (PGEO) from Palestine utilizing reference methods. There were 70 chemicals found in the GCMS analysis, and oxygenated terpenoids were the most a

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Prokopieva, V., E. Yarygina, and E. Plotnikov. "Protection of proteins and lipids of blood plasma by different lithium salts under ethanol-induced oxidative damage." European Psychiatry 41, S1 (2017): S758—S759. http://dx.doi.org/10.1016/j.eurpsy.2017.01.1421.

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IntroductionThe creation of new lithium compounds with antioxidant activity is relevant problem for psychiatry. The aim of this work was study of the protective effect of lithium salts against ethanol-induced oxidative damage to proteins and lipids of human blood plasma in vitro.MethodsWe used lithium ascorbate and lithium carbonate 0.6 mmol/L which correspond to the therapeutic dose (in terms of lithium ions). Antioxidant carnosine (β-Ala-L-His) was used as comparison drug. We used the blood of 12 healthy donors. The heparinized blood samples were incubated in presence of tested preparations

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Araujo, Gabriel C., Tanya N. Antonini, Vicki Anderson, et al. "Profiles of Executive Function Across Children with Distinct Brain Disorders: Traumatic Brain Injury, Stroke, and Brain Tumor." Journal of the International Neuropsychological Society 23, no. 7 (2017): 529–38. http://dx.doi.org/10.1017/s1355617717000364.

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AbstractObjectives:This study examined whether children with distinct brain disorders show different profiles of strengths and weaknesses in executive functions, and differ from children without brain disorder.Methods:Participants were children with traumatic brain injury (N=82; 8–13 years of age), arterial ischemic stroke (N=36; 6–16 years of age), and brain tumor (N=74; 9–18 years of age), each with a corresponding matched comparison group consisting of children with orthopedic injury (N=61), asthma (N=15), and classmates without medical illness (N=68), respectively. Shifting, inhibition, an

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Comasco, Erika, Jarmila Hallman, and Åsa Wallén-Mackenzie. "Haplotype-tag single nucleotide polymorphism analysis of the Vesicular Glutamate Transporter (VGLUT) genes in severely alcoholic women." Psychiatry Research 219, no. 2 (2014): 403–5. http://dx.doi.org/10.1016/j.psychres.2014.05.052.

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Hinteregger, Barbara, Tina Loeffler, Stefanie Flunkert, et al. "Metabolic, Phenotypic, and Neuropathological Characterization of the Tg4-42 Mouse Model for Alzheimer’s Disease." Journal of Alzheimer's Disease 80, no. 3 (2021): 1151–68. http://dx.doi.org/10.3233/jad-201204.

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Background: Preclinical Alzheimer’s disease (AD) research strongly depends on transgenic mouse models that display major symptoms of the disease. Although several AD mouse models have been developed representing relevant pathologies, only a fraction of available mouse models, like the Tg4-42 mouse model, display hippocampal atrophy caused by the death of neurons as the key feature of AD. The Tg4-42 mouse model is therefore very valuable for use in preclinical research. Furthermore, metabolic biomarkers which have the potential to detect biochemical changes, are crucial to gain deeper insights

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