Calorimetric investigation of the antimicrobial action and insight into the chemical properties of “angelita” honey—a product of the stingless bee Tetragonisca angustula from Colombia

2004 ◽  
Vol 415 (1-2) ◽  
pp. 107-113 ◽  
Author(s):  
Alexandra Torres ◽  
Assegid Garedew ◽  
Erik Schmolz ◽  
Ingolf Lamprecht
Keyword(s):  
Chemical Properties ◽  
Stingless Bee ◽  
Antimicrobial Action ◽  
Calorimetric Investigation ◽  
Tetragonisca Angustula ◽  
Insight Into

scholarly journals Solvent selection for fatty acid residue analysis of archeologicial artifacts

2017 ◽  
Vol 3 (1) ◽  
pp. 1-10
Author(s):  
Jeffrey J. Rosentreter ◽  
John Malamakal ◽  
Kelli Barnes ◽  
Matt Alexander
Keyword(s):  
Fatty Acids ◽  
Extraction Efficiency ◽  
Lipid Analysis ◽  
Residue Analysis ◽  
Chemical Properties ◽  
Fatty Acid Residue ◽  
Quantitative Extraction ◽  
Selection For ◽  
Carbonized Wood ◽  
Insight Into

AbstractResidue analysis has rapidly become one of the most useful techniques for determining an artifact function and revealing insight into paleodiets. The success of analytical residue analysis often lies with the first preparatory step, where the residue is extracted from the object. Detection of a residue requires effective solvation of the material, and there is a large range of potential solvents. One purpose of this study is to determine the efficiency of various solvents for the extraction of fatty acids from charcoal, a material that is ubiquitous, easily identified, remarkably stable in the archaeological record but, most importantly for this research, retains fats extremely well. This investigation examines the removal efficiency of model fatty acids from carbonized wood samples. The strong affinity of lipids to charcoal makes carbonized wood ideal for retaining them, but also makes their extraction extremely challenging and thus an ideal benchmark for solvent extraction characterization. Several solvents (benzene, chloroform, hexane, methanol and water) are used to determine the quantitative extraction efficiency of tripalmitin. While benzene and chloroform perform best for some wood types, neither solvent is better for all carbonized wood. Correlations between the chemical properties of the solvents and the effectiveness of the extraction provide guidance for solvents. Findings indicate solvent characteristics including dipole moment, dielectric constant, hydrogen bonding, and molecular weight all play an important role in extraction of fat from a charcoal matrix. Results presented should provide guidelines to allow for more effective residue extration and more accurate lipid analysis.

scholarly journals Physicochemical characterization, antioxidant and antifungal activity of three stingless bee pollen aggregate (Apidae: Meliponini) from Soconusco, Chiapas

2020 ◽  
Vol 39 (1) ◽  
Author(s):  
Víctor Albores-Flores ◽  
Erick Saavedra-Camacho ◽  
José Alfonso López-García ◽  
Julieta Grajales-Conesa ◽  
Liliana Carolina Córdova-Albores
Keyword(s):  
Antifungal Activity ◽  
Colletotrichum Gloeosporioides ◽  
Physicochemical Characterization ◽  
Stingless Bee ◽  
Melipona Beecheii ◽  
Bee Pollen ◽  
Scaptotrigona Mexicana ◽  
Tetragonisca Angustula

<p>La interacción planta-abeja puede generar productos de la colmena con diferentes características fisicoquímicas, bioactivos y actividad antimicrobiana. Por lo cual, en este trabajo se determinó la composición química de conglomerados o agregados de polen colectados de 12 colmenas establecidas en Chiapas, México, en los municipios Tapachula, Mazatán y Cacahoatán, dentro de tres meliponarios comerciales asociados a las especies: <em>Melipona beecheii</em>, <em>Scaptotrigona mexicana</em> y <em>Tetragonisca angustula</em>. Asimismo, se evaluó el efecto de los agregados de polen en <em>Colletotrichum gloeosporioides</em>. Se encontró una composición química muy diversa independientemente de la especie de abeja. El polen obtenido de colmenas con <em>M. beecheii</em> tuvieron la mayor cantidad de fenoles, flavonoides y acidez libre. Estas propiedades, en adición de la capacidad antioxidante (trolox), glucosa y pH, estuvieron asociados a la inhibición del crecimiento <em>in vitro</em> de<em> C. gloeosporioides</em>. La velocidad de crecimiento radial del hongo durante nueve días fue de 0.013 a 0.009 mm h-1 con extractos de polen, 44 % menor que el efecto del clorotalonil. La actividad antifúngica de los extractos de polen fue de 65 y 37 % para <em>M. beecheii</em>, 57 y 16 % para <em>T. angustula</em> y 60 y 30 % para S. mexicana, respecto al tratamiento testigo y a la dosis más alta de clorotalonil, respectivamente.</p>

scholarly journals An Insight into Phytochemical, Pharmacological, and Nutritional Properties of Arbutus unedo L. from Morocco

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Mohammed El Haouari ◽  
Najat Assem ◽  
Sushil Changan ◽  
Manoj Kumar ◽  
Sevgi Durna Daştan ◽  
...  
Keyword(s):  
Scientific Evidence ◽  
Chemical Properties ◽  
Toxicity Tests ◽  
Medicinal Uses ◽  
Arbutus Unedo ◽  
Biochemical Compounds ◽  
Health Promoting ◽  
Phytochemical Compounds ◽  
Insight Into ◽  
Important Medicinal Plant

Arbutus unedo L. (Ericaceae) is an evergreen shrub widely distributed in the Mediterranean region, particularly through the Moroccan forests. It is an important medicinal plant of great scientific interest due to its nutritional, pharmacological, and chemical properties. The objective of this review is to provide insights into traditional medicinal uses and phytochemical and pharmacological properties of A. unedo from Morocco. In Morocco, the plant has been used as a traditional medicine to treat several pathological conditions. Many phytochemical compounds have been reported in the plant, of which vitamins, carotenoids, flavonoids, polyphenols, tannins, and their derivatives are the most prevalent. Leaves and fruits of A. unedo contain the most significant number of phytochemicals among the species. Furthermore, researchers have demonstrated that A. unedo exhibited antioxidant, anticancer, antibacterial, antidiabetic, antiaggregant, and antihypertensive activities due to the presence of many biochemical compounds with health-promoting properties. According to different toxicity tests, the use of A. unedo is devoid of any significant side effects and/or toxicity. Despite its nutraceutical and health-promoting properties, Moroccan A. unedo remains underexploited mainly, and most of its traditional uses have not yet undergone scientific evidence-based research; therefore, improved knowledge about the potential value of the plant would allow understanding of its biological activity based on its phytochemical compounds that may contribute to the species preservation and valorization.

Genetic variability in captive populations of the stingless bee Tetragonisca angustula

Genetica ◽  
2016 ◽  
Vol 144 (4) ◽  
pp. 397-405 ◽  
Author(s):  
Leandro R. Santiago ◽  
Flávio O. Francisco ◽  
Rodolfo Jaffé ◽  
Maria C. Arias
Keyword(s):  
Genetic Variability ◽  
Stingless Bee ◽  
Captive Populations ◽  
Tetragonisca Angustula

Local Mineral and Matrix Changes Associated with Bone Adaptation and Microdamage

2005 ◽  
Vol 898 ◽  
Author(s):  
David H. Kohn ◽  
Nadder D. Sahar ◽  
Sun Ig Hong ◽  
Kurtulus Golcuk ◽  
Michael D. Morris
Keyword(s):  
Mechanical Loading ◽  
Chemical Properties ◽  
Fatigue Loading ◽  
Bone Adaptation ◽  
Extrinsic Factors ◽  
Intrinsic Factors ◽  
High Incidence ◽  
Insight Into ◽  
Skeletal Fracture

AbstractSkeletal fractures represent a significant medical and economic burden for society. It is generally thought that a high incidence of musculoskeletal fatigue loading results in damage accumulation at too high of a rate to be efficiently remodeled, leading to skeletal fracture. The state of damage in bone at a given time is therefore the net result of damage and repair processes, and is dependent upon extrinsic factors such as mechanical history, but also upon intrinsic factors, such as composition of bone mineral and matrix. In this invited paper, we review investigations on the coupling of Raman spectroscopy with mechanical loading of bone, providing insight into mechanisms of ultrastructural deformation in bone at smaller scales than previously understood. We also present new data showing that in-vivo mechanical loading results in increased resistance to fatigue damage, coupled with an increase in phosphate to amide I ratio and decrease in carbonate to phosphate ratio. Taken together, the data demonstrates the ability to modulate the mechanical and chemical properties of bone via exogenous mechanical stimulation.

Crystal structure of a major seed storage protein, 11S proglobulin, from Amaranthus hypochondriacus: Insight into its physico-chemical properties

2012 ◽  
Vol 135 (2) ◽  
pp. 819-826 ◽  
Author(s):  
Mary Rose Tandang-Silvas ◽  
Cerrone S. Cabanos ◽  
Laura Denisse Carrazco Peña ◽  
Ana Paulina Barba De La Rosa ◽  
Juan Alberto Osuna-Castro ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Storage Protein ◽  
Seed Storage Protein ◽  
Chemical Properties ◽  
Seed Storage ◽  
Amaranthus Hypochondriacus ◽  
Physico Chemical ◽  
Insight Into

scholarly journals Hovering guards of the stingless bee Tetragonisca angustula increase colony defensive perimeter as shown by intra- and inter-specific comparisons

2011 ◽  
Vol 65 (6) ◽  
pp. 1277-1282 ◽  
Author(s):  
Jelle S. van Zweden ◽  
Christoph Grüter ◽  
Sam M. Jones ◽  
Francis L.W. Ratnieks
Keyword(s):  
Stingless Bee ◽  
Tetragonisca Angustula

scholarly journals Insight into Erythrina Lectins: Properties, Structure and Proposed Physiological Significance

2017 ◽  
Vol 5 (1) ◽  
pp. 57-71 ◽  
Author(s):  
Makarim Elfadil M. Osman ◽  
Emadeldin Hassan E. Konozy
Keyword(s):  
Biological Significance ◽  
Chemical Properties ◽  
Biological Properties ◽  
Physical And Chemical Properties ◽  
Vegetative Tissues ◽  
Isolation And Characterization ◽  
Coral Tree ◽  
Physical And Chemical ◽  
Insight Into ◽  
And Chemical Properties

The genus Erythrina, collectively known as “coral tree”, are pantropical plants, comprising of more than 112 species. Since the early 1980s, seven of these have been found to possess hemagglutinating activity, although not yet characterized. However, around two dozen galactose-binding lectins have been isolated and fully characterized with respect to their sugar specificity, glycoconjugates agglutination, dependence of activity on metal ions, primary and secondary structures and stability. Three lectins have been fully sequenced and the crystal structures of the two proteins have been solved with and without the haptenic sugar. Lectins isolation and characterization from most of these species usually originated from the seeds, although the proteins from other vegetative tissues have also been reported. The main objective of this review is to summarize the physicochemical and biological properties of the reported purified Erythrina lectins to date. Structural comparisons, based on available lectins sequences, are also made to relate the intrinsic physical and chemical properties of these proteins. Particular attention is also given to the proposed biological significance of the lectins from the genus Erythrina.

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