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Journal articles on the topic 'Guaiacum'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Ibrahim, Sadaf, S. N. H. Naqvi, Rehana Perveen, Hina Abrar, and Zuneera Akram. "ANTIDIABETIC EFFECT OF GUAIACUM OFFICINALE." Professional Medical Journal 25, no. 04 (2018): 620–26. http://dx.doi.org/10.29309/tpmj/2018.25.04.360.

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Introduction: Diabetes is the most genetically transmitted disease all over theworld. It badly affects the vital organs and manifest the reduction of pancreatic amylase andlipase. Objectives: This study has been designed to investigate the role of Guaiacum officinaleextract in controlling of diabetes in streptozotocin (STZ) induced type 2 diabetes male albino(Wistar) rats. Study Design: Experimental. Setting: Baqai Medical University. Period: January2017- June 2017. Method: Bark extract of Guaiacum officinale (500mg/kg) was administeredto STZ induced rat. Glibenclamide (GLB) was used as standard drug. The approach of thestudy was to observe the effect of Guaiacum officinale on pancreatic amylase and lipase and itstissue architecture by histopathology. Rats were divided in four groups i-e control, STZ treated,STZ + GLB treated and STZ +extract treated group. Results: Guaiacum officinale significantlyimprove the level of pancreatic amylase and lipase as compared to the STZ induced group.Similarly the pancreatic architecture was significantly affected by STZ alone. These changeswere considerably reversed by Guaiacum officinale and GLB. Conclusion: It was concludedthat Guaiacum officinale herb useful to cure the diabetes and it is effective in protecting pancreasfrom diabetes induced damages.

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2

Ibrahim, Sadaf, S. N. H. Naqvi, Rehana Perveen, Hina Abrar, and Zuneera Akram. "ANTIDIABETIC EFFECT OF GUAIACUM OFFICINALE;." Professional Medical Journal 25, no. 04 (2018): 620–26. http://dx.doi.org/10.29309/tpmj/18.4505.

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3

López-Toledo, Leonel, Constantino Gonzalez-Salazar, David F. R. P. Burslem, and Miguel Martinez-Ramos. "Conservation Assessment of Guaiacum sanctum and Guaiacum coulteri: Historic Distribution and Future Trends in Mexico." Biotropica 43, no. 2 (2010): 246–55. http://dx.doi.org/10.1111/j.1744-7429.2010.00682.x.

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4

de Almeida Alves, Tânia Maria, Tanus Jorge Nagem, Antônia Ribeiro, et al. "Molluscicidal Saponins from Guaiacum officinale (Zygophyllaceae)." International Journal of Pharmacognosy 34, no. 2 (1996): 81–86. http://dx.doi.org/10.1076/phbi.34.2.81.13189.

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5

Ahmad, Viqar Uddin, Nasreen Bano, Shaheen Bano, David L. Smith, and Razieh Yazdanparast. "A New Prosapogenin from Guaiacum officinale." Journal of Natural Products 48, no. 5 (1985): 826–27. http://dx.doi.org/10.1021/np50041a022.

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6

Ahmad, Viqar Uddin, Shafi Uddin, Shaheen Bano, and Iqbal Fatima. "Two saponins from fruits of Guaiacum officinale." Phytochemistry 28, no. 8 (1989): 2169–71. http://dx.doi.org/10.1016/s0031-9422(00)97937-8.

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7

Ahmad, Viqar Uddin, Nasreen Bano, Shaheen Bano, Ayjaz Fatima, and Lenart Kenne. "Guaianin, a New Saponin from Guaiacum offcinale." Journal of Natural Products 49, no. 5 (1986): 784–86. http://dx.doi.org/10.1021/np50047a003.

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8

Mendes, Nelymar Martineli, José D. Gómez, Neusa Araújo, Carlos Leomar Zani, and Naftale Katz. "Ensaios preliminares do Guaiacum officinale L. como moluscicida." Revista do Instituto de Medicina Tropical de São Paulo 35, no. 6 (1993): 509–13. http://dx.doi.org/10.1590/s0036-46651993000600006.

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Suspensões aquosas do pericarpo do fruto, da casca da raiz, das folhas e das sementes de Guaiacum officinale foram testadas como moluscicida, cercaricida e piscicida em diferentes concentrações. Em laboratório, a suspensão do pericarpo do fruto apresentou 100% de mortalidade a 100 ppm para desovas de B. glabrata, a 20 ppm para caramujos adultos de Biomphalaria glabrata, B. straminea e B. tenagophila, a 5 ppm para Lebistes reticulatus (peixes) e a 1 ppm para cercárias de Schistosoma mansoni. O extrato etanólico do pericarpo do fruto não foi ativo para caramujo adulto de B. glabrata. As doses letais para 90% dos caramujos adultos (DL90), após 24 horas de exposição, usando a suspensão do pericarpo do fruto foram de: 15 ppm para B. glabrata; 14 ppm para B. straminea e 18 ppm para B. tenagophila. As DL90 das suspensões das casca da raiz, sementes e folhas contra B. glabrata foram de 57, 33 e 15 ppm, respectivamente. No campo, coma suspensão do pericarpo do fruto a mortalidade de caramujos adultos de B. glabrata foi de 68% a 20 ppm e 100% a 40 ppm

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9

Brostow, Witold, Kevin P. Menard, and Noah Menard. "Combustion Properties of Several Species of Wood." Chemistry & Chemical Technology 3, no. 3 (2009): 173–76. http://dx.doi.org/10.23939/chcht03.03.173.

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Six species of wood were studied by combined thermogravimetric and differential thermal analysis (TG/DTA) so as to evaluate their combustion properties in terms of the amount of energy released, the initial temperature of ignition, and the cleanness of burning. Pinus monticola, Acer saccharum, Quercus rubra, Diospyrus spp., Tabebuia spp. and Guaiacum spp. were chosen to provide a wide range of hardness values and densities. Quercus rubra burned to the hottest temperature of the samples, and also left the least amount of ash behind. For Guaiacum spp. its burning temperature is in the middle of the peak temperatures for other woods – while its final amount of ash is considerably larger than in the other samples. There is no connection between the wood density and the parameters characterizing the burning process.

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10

Uddin Ahmad, Viqar, Nasreen Bano, and Bano Shaheen. "A saponin from the stem bark of Guaiacum officinale." Phytochemistry 25, no. 4 (1986): 951–52. http://dx.doi.org/10.1016/0031-9422(86)80035-8.

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11

Ahmad, Viqar Uddin, Nikhat Saba, and Khalid Mohammed Khan. "Triterpenoid saponin from the bark of Guaiacum Officinale L." Natural Product Research 18, no. 2 (2004): 111–16. http://dx.doi.org/10.1080/1478641031000140866.

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12

Maydom, Katrina Elizabeth. "James Petiver's apothecary practice and the consumption of American drugs in early modern London." Notes and Records: the Royal Society Journal of the History of Science 74, no. 2 (2020): 213–38. http://dx.doi.org/10.1098/rsnr.2019.0015.

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In the late seventeenth century, there was a boom in English imports of drugs from the Americas, such as sassafras, guaiacum and sarsaparilla. This was a result of a wider increase in colonial trade, the English acquisition of new drug-producing territories, such as Jamaica, and a broader trend towards greater medical consumption of drugs. How were these American drugs received in early modern English medicine? James Petiver (1665–1718), an apothecary in London, incorporated these drugs in his retail trade and institutional care. Analysis of Petiver's medical receipt books, daily prescription journals and administrative records demonstrates that American drugs, such as Virginia snakeroot, guaiacum and jalap, were readily accessible and dispensed to patients of all social classes in London by the turn of the eighteenth century. One-third of Petiver's private patients and one-fifth of his institutional patients were treated with American drugs. While men, women and children were all routinely prescribed American drugs, a greater variety of these drugs were available to his retail clients.

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13

Offiah, Nkechi V., and Chidum E. Ezenwaka. "Antifertility Properties of the Hot Aqueous Extract of Guaiacum officinale." Pharmaceutical Biology 41, no. 6 (2003): 454–57. http://dx.doi.org/10.1076/phbi.41.6.454.17823.

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14

Fuchs, E. J., and J. L. Hamrick. "Genetic Diversity in the Endangered Tropical Tree, Guaiacum sanctum (Zygophyllaceae)." Journal of Heredity 101, no. 3 (2010): 284–91. http://dx.doi.org/10.1093/jhered/esp127.

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15

Gordon, James E., Marco Antonio González, Jesús Vázquez Hernández, Roberto Ortega Lavariega, and Alberto Reyes-García. "Guaiacum coulteri: an over-logged dry forest tree of Oaxaca, Mexico." Oryx 39, no. 1 (2005): 82–85. http://dx.doi.org/10.1017/s0030605305000141.

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Logging history and population structure of the dry forest tree species Guaiacum coulteri are described for Oaxaca, Mexico. We propose that the species has been adversely affected by selective logging, with large individuals now being uncommon. We argue that the species is likely to have undergone similar changes elsewhere in its range and, following IUCN guidelines, propose that it is categorized as Endangered. Maintenance of G. coulteri as an understorey shrub may be possible given current land use practices in the area but recovery of populations of large individuals may be more difficult. Suggestions for future research are made.

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16

Ahmad, Viqar Uddin, Nikhat Saba, Zulfiqar Ali, Muhammad Zahid, and Naseer Alam. "A New Triterpenoidal Saponin from the Bark of Guaiacum officinale L." Zeitschrift für Naturforschung B 55, no. 2 (2000): 227–30. http://dx.doi.org/10.1515/znb-2000-0216.

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A new triterpenoidal saponin, akebonic acid-3-O-[α-L-rhamnopyranosyl-(1→3)-β-D-glucopyranosyl-( l→3)-α-L-rhamnopyranosyl-(l→2)-β-L-arabinopyranoside], named as guaianin Q (1), was isolated from the n-butanolic extract of the bark of Guaiacum officinale L. The structure of 1 was established with the help of the comparative studies of ID and 2D 1H - 13C NMR methods, FABMS, alkaline and acid hydrolyses. In addition to 1, a number of known saponins were also isolated and reported from the same source.

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17

Axelrod, Franklin S. "(1528) Proposal to conserve the name Guaiacum (Zygophyllaceae ) with that spelling." TAXON 51, no. 1 (2002): 203–4. http://dx.doi.org/10.2307/1554990.

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18

Wendelken, Peter W., and Robert F. Martin. "Avian Consumption of Guaiacum sanctum Fruit in the Arid Interior of Guatemala." Biotropica 19, no. 2 (1987): 116. http://dx.doi.org/10.2307/2388732.

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19

Ahmad, Viqar Uddin, Shafi Uddin, and Shaheen Bano. "Isolation and Structure Elucidation of Saponins from the Fruit of Guaiacum officinale." Journal of Natural Products 53, no. 5 (1990): 1168–75. http://dx.doi.org/10.1021/np50071a005.

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20

Ostapkowicz, Joanna, Alex Wiedenhoeft, Christopher Bronk Ramsey, et al. "‘Treasures… of black wood, brilliantly polished’: five examples of Taíno sculpture from the tenth–sixteenth century Caribbean." Antiquity 85, no. 329 (2011): 942–59. http://dx.doi.org/10.1017/s0003598x00068411.

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Five wooden sculptures from the pre-contact Caribbean, long held in museum collections, are here dated and given a context for the first time. The examples studied were made from dense Guaiacum wood, carved, polished and inlaid with shell fastened with resin. Dating the heartwood, sapwood and resins takes key examples of ‘Classic’ Taíno art back to the tenth century AD, and suggests that some objects were treasured and refurbished over centuries. The authors discuss the symbolic properties of the wood and the long-lived biographies of some iconic sculptures.

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21

Maneechai, Suthira, and Vachiraporn Pikulthong. "Total Phenolic Contents and Free Radical Scavenging Activity of Guaiacum officinale L. Extracts." Pharmacognosy Journal 9, no. 6 (2017): 929–31. http://dx.doi.org/10.5530/pj.2017.6.145.

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22

MCCAULEY, ROSS A., AUREA C. CORTÉS-PALOMEC, and KEN OYAMA. "Isolation, characterization, and cross-amplification of polymorphic microsatellite loci in Guaiacum coulteri (Zygophyllaceae)." Molecular Ecology Resources 8, no. 3 (2008): 671–74. http://dx.doi.org/10.1111/j.1471-8286.2007.02043.x.

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23

DUWIEJUA, M., I. J. ZEITLIN, P. G. WATERMAN, and A. I. GRAY. "Anti-inflammatory Activity of Polygonum bistorta, Guaiacum officinale and Hamamelis virginiana in Rats." Journal of Pharmacy and Pharmacology 46, no. 4 (1994): 286–90. http://dx.doi.org/10.1111/j.2042-7158.1994.tb03795.x.

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24

Lowe, Henry. "Anti HIV-1 Activity of the Crude Extracts of Guaiacum officinale L. (Zygophyllaceae)." European Journal of Medicinal Plants 4, no. 4 (2014): 483–89. http://dx.doi.org/10.9734/ejmp/2014/7343.

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25

Flores Barahona, Allison, Lilian Ferrufino Acosta, and Virna López Castro. "Viabilidad de semillas de guayacán (Guaiacum sanctum L., Zygophyllaceae) posterior a dos tratamientos pregerminativos." Portal de la Ciencia, no. 16 (July 17, 2019): 25–37. http://dx.doi.org/10.5377/pc.v0i16.8093.

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Guaiacum sanctum L. es una especie arbórea de crecimiento lento que pertenece a la familia Zygophyllaceae, habita en el bosque seco subtropical y tropical. El objetivo de este estudio fue analizar la viabilidad de semillas de guayacán, posterior a dos tratamientos pregerminativos. La colecta de semillas se realizó en las cercanías del estadio Carlos Miranda, en el departamento de Comayagua, Honduras. Una vez colectadas las semillas se empleó corte longitudinal en la testa y lixiviación, como tratamientos pregerminativos y posteriormente se aplicó pruebas de flotabilidad y de tetrazolio para el análisis de viabilidad. Se obtuvo como resultados un mayor número de semillas viables, registrando los porcentajes de viabilidad más altos, en aquellas a las que no se les aplicó tratamiento pregerminativo. En cuanto a las pruebas de viabilidad se demostró que la más efectiva es la de tetrazolio, ya que permite observar de forma directa el embrión y el estado de los tejidos embrionarios. El análisis de viabilidad contribuyó a conocer la posible influencia de dichos tratamientos en la viabilidad de las semillas. Estos son factores importantes ya que se encuentran relacionados con la germinación de esta especie vegetal de especial interés económico y forestal.

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Fuchs, Eric J., and James L. Hamrick. "Spatial genetic structure within size classes of the endangered tropical tree Guaiacum sanctum (Zygophyllaceae)." American Journal of Botany 97, no. 7 (2010): 1200–1207. http://dx.doi.org/10.3732/ajb.0900377.

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27

Sarkar, Amrita, Poulami Datta, Asok Kumar Das, and Antony Gomes. "Anti-rheumatoid and anti-oxidant activity of homeopathic Guaiacum officinale in an animal model." Homeopathy 103, no. 2 (2014): 133–38. http://dx.doi.org/10.1016/j.homp.2013.08.006.

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Lambert, Joseph B., Yuyang Wu, Michael A. Kozminski, and Jorge A. Santiago-Blay. "Characterization of Eucalyptus and Chemically Related Exudates by Nuclear Magnetic Resonance Spectroscopy." Australian Journal of Chemistry 60, no. 11 (2007): 862. http://dx.doi.org/10.1071/ch07163.

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Exudates from six species of the genus Eucalyptus and one of the genus Corymbia (formerly Eucalyptus), from the family Myrtaceae, have been characterized by solid-state 13C and solution 1H NMR spectroscopy for the first time. Although these eucalypt kinos, as these exudates often are called, resemble resin (terpenoid) and gum (carbohydrate) exudates in physical appearance, their NMR spectra are dramatically different. In addition to lacking the characteristic terpene saturated resonances, they exhibit strong unsaturated resonances, which are weak for resins and absent for gums. We additionally report that exudates from genera of several other families of flowering plants (Amyris, Centrolobium, Guaiacum, Liquidambar, and Prosopis) also exhibit part or all of this kino spectroscopic signature.

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Mendoza- Arroyo, Gustavo Enrique, Angélica Navarro-Martínez, Susana Ochoa-Gaona, and Hans van der Wal. "ARQUITECTURA ARBÓREA Y DESARROLLO DEL BOSQUE DE Guaiacum sanctum L. EN BALAM-KIN, CAMPECHE, MÉXICO." REVISTA CHAPINGO SERIE CIENCIAS FORESTALES Y DEL AMBIENTE XVII, no. 2 (2011): 215–24. http://dx.doi.org/10.5154/r.rchscfa.2010.11.114.

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30

Martínez, Esteban, and Carlos Galindo-Leal. "La vegetación de Calakmul, Campeche, México: clasificación, descripción y distribución." Botanical Sciences, no. 71 (June 1, 2017): 7. http://dx.doi.org/10.17129/botsci.1660.

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The Calakmul region, at the center of the Yucatan peninsula, contains the largest forested area of the Mexican tropics. Our objective is to provide the classification, description and spatial distribution of the plant communities of Calakmul region. In spite of the relatively lack of topographic features there is large spatial heterogeneity in the vegetation. Five plant associations are underlined because of their regional, national and world relevance: guayacán forest (Guaiacum sanctum), jobillo forest (Astronium graveolens), low deciduous forest, tall forest and mixed seasonally flooded forest. We discuss the main factors influencing the vegetation, including rainfall gradients, soil development, natural disturbances and anthropogenic factors. This study underscores the importance of using vegetation classification with enough detail to assess the representation and effectiveness of natural protected areas.

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31

Bahado-Singh, Perceval Steven. "Wound Healing Potential of Tillandsia recurvata and Guaiacum officinale in Streptozotocin Induced Type 1 Diabetic Rats." American Journal of Biomedical and Life Sciences 2, no. 6 (2014): 146. http://dx.doi.org/10.11648/j.ajbls.20140206.12.

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32

Fuchs, Eric J., and J. L. Hamrick. "Mating system and pollen flow between remnant populations of the endangered tropical tree, Guaiacum sanctum (Zygophyllaceae)." Conservation Genetics 12, no. 1 (2010): 175–85. http://dx.doi.org/10.1007/s10592-010-0130-8.

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33

Zúñiga-Ortiz, Alejandro. "Conservación del guayacán real (Guaiacum sanctum L., Zygophyllaceae) y cuál es la distribución potencial de sus poblaciones en Costa Rica." Revista Forestal Mesoamericana Kurú 13, no. 30 (2015): 01. http://dx.doi.org/10.18845/rfmk.v13i30.2453.

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<p>El guayacán real (Guaiacum sanctum L., Zygophyllaceae) es un árbol que alcanza hasta 20 metros de altura y 60 cm de diámetro. Es una de las especies arbóreas con madera dura de las zonas tropicales de América, su gravedad específica llega a alcanzar valores en el orden de 1,12-1,35. Se distribuye desde el sur de Florida, el este de México, América Central y el Caribe. En algunas de estas regiones, el guayacán se extrajo intensamente de manera ilegal, lo que asociado a procesos de deforestación y del cambio del uso del suelo, lo llevó hacia la disminución alarmante de sus poblaciones e incluso a la extinción local, principalmente en América Central y el Caribe durante los años 70’s y 90’s.</p>

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34

Gänger, Stefanie. "World Trade in Medicinal Plants from Spanish America, 1717–1815." Medical History 59, no. 1 (2014): 44–62. http://dx.doi.org/10.1017/mdh.2014.70.

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AbstractThis article outlines the history of the commerce in medicinal plants and plant-based remedies from the Spanish American territories in the eighteenth century. It maps the routes used to transport the plants from Spanish America to Europe and, along the arteries of European commerce, colonialism and proselytism, into societies across the Americas, Asia and Africa. Inquiring into the causes of the global ‘spread’ of American remedies, it argues that medicinal plants like ipecacuanha, guaiacum, sarsaparilla, jalap root and cinchona moved with relative ease into Parisian medicine chests, Moroccan court pharmacies and Manila dispensaries alike, because of their ‘exotic’ charisma, the force of centuries-old medical habits, and the increasingly measurable effectiveness of many of these plants by the late eighteenth century. Ultimately and primarily, however, it was because the disease environments of these widely separated places, their medical systems and materia medica had long become entangled by the eighteenth century.

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35

Pendyala, Vijetha, Vidyadhara Suryadevara, Subbarao Jampani, and Suhasini Jala. "GC-MS Analysis and Molecular Docking of Bioactive Components from Leaves of Guaiacum officinale for Anti-inflammatory Activity." Asian Journal of Organic & Medicinal Chemistry 4, no. 3 (2019): 180–84. http://dx.doi.org/10.14233/ajomc.2019.ajomc-p217.

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Present study was an attempt to investigate the bioactive components present in the leaves of Guaiacum officinale using gas chromatography-mass spectroscopy (GC-MS) analysis and study the antiinflammatory potential of those constituents using molecular docking studies. GC-MS analysis was done by standard protocol using the equipment JEOL GC MATE II. The identification of components was based on NIST (National Institute of Standards and Technology) Version-11 library as well as comparison of their retention indices. The molecular docking studies were done using the commercial docking software MCULE, 1-click docking. GC-MS analysis of the alcoholic extract showed the presence of ten compounds at different retention times. The phytoconstituent 8,11,14-eicosatrienoic acid was present at high concentration with % peak area of 43.3 at a retention time of 19.43 min followed by 5,7-dihydroxy-8-methoxy flavone (Wogonin) at a retention time of 17.73. All 10 compounds obtained from GC-MS analysis and diclofenac were used as the ligands in this study, with cyclooxygenase-2 (COX-2), phospholipase A2 and interleukin receptor as the molecular targets. in silico Docking studies revealed that the flavanoid Wogonin is having highest binding potential indicated by least docking score of -8.2, -8 and -6.9 kcal/mol on COX-2, phospholipase A2 and interleukin receptor respectively.

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36

May, Tomas. "Variación interanual de la floración y visita de abejas en cuatro especies de árboles de bosque seco en República Dominicana." Revista Forestal Mesoamericana Kurú 12, no. 29 (2015): 15. http://dx.doi.org/10.18845/rfmk.v12i29.2252.

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Entre septiembre 2010 a agosto 2013, en los municipios Bánica y Pedro Santana, en el suroeste de la República Dominicana, se realizaron observaciones de la floración de cuatro especies de interés apícola presentes en el bosque seco de la República Dominicana: Guaiacum officinale, Bursera simaruba, Acacia scleroxylon y Zizyphus rignonii. Durante los tres años, el momento de inicio de la floración no varió o solamente varió en una o dos quincenas. La proporción de árboles que llegaron a florecer disminuyó sensiblemente en los 2012 y 2013, período con época seca muy intensa. La intensidad de la visita de abejas en las flores también disminuyó en ese período. Además, la duración de la floración de Bursera simaruba y Acacia scleroxylon fue afectada negativamente por un exceso de lluvia de marzo a mayo 2012. Como recomendación de amortiguamiento al cambio climático, se recomienda mantener una diversidad de especies vegetales de interés apícola con diferentes épocas de floración.

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37

Oyama, Ken, Miguel Martínez-Ramos, Juan Manuel Peñaloza-Ramírez, Víctor Rocha-Ramírez, Esmeralda G. Armenta-Medina, and Paulina Hernández-Soto. "Population genetic structure of an extremely logged tree species Guaiacum sanctum L. in the Yucatan Peninsula, Mexico." Botanical Sciences 94, no. 2 (2016): 345. http://dx.doi.org/10.17129/botsci.278.

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38

Lopez-Toledo, Leonel, Guillermo Ibarra-Manríquez, David F. R. P. Burslem, Esteban Martínez-Salas, Fernando Pineda-García, and Miguel Martínez-Ramos. "Protecting a single endangered species and meeting multiple conservation goals: an approach with Guaiacum sanctum in Yucatan Peninsula, Mexico." Diversity and Distributions 18, no. 6 (2011): 575–87. http://dx.doi.org/10.1111/j.1472-4642.2011.00857.x.

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39

Sánchez-Soto, Bardo Heleodoro, Elizabeth Pacheco-Aispuro, Gabriel Antonio Lugo-García, Álvaro Reyes-Olivas, and Edmundo García-Moya. "Métodos de escarificación en semillas de Guaiacum coulteri , especie amenazada del bosque tropical caducifolio del norte de Sinaloa, México." Gayana. Botánica 74, no. 2 (2017): 262–68. http://dx.doi.org/10.4067/s0717-66432017000200262.

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40

Schaffer, B., and L. J. Mason. "Effects of scale insect herbivory and shading on net gas exchange and growth of a subtropical tree species (Guaiacum sanctum L.)." Oecologia 84, no. 4 (1990): 468–73. http://dx.doi.org/10.1007/bf00328162.

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Centeno-Betanzos, Lucía Yoscelina, Alicia Enriqueta Brechú-Franco, Helia Reyna Osuna-Fernández, Guillermo Laguna-Hernández, and Calixto León-Gómez. "Comparación anatómica e histoquímica de la madera del guayacán medicinal proveniente de muestras de mercados con la de Guaiacum coulteri A. Gray." Acta Botanica Mexicana 1, no. 105 (2013): 31. http://dx.doi.org/10.21829/abm105.2013.222.

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El guayacán como planta medicinal se recomienda para problemas de salud derivados de la diabetes mellitus. En la literatura, la especie que cuenta con más reportes con el nombre común de guayacán esGuaiacum coulteri. Se caracterizaron anatómica e histoquímicamente muestras de la madera de guayacán procedentes de cinco mercados públicos de la Ciudad de México y una de G. coulteri obtenida de la xiloteca MEXUw, del Instituto de Biología de la Universidad Nacional Autónoma de México. Al contrastar la estructura anatómica de los especímenes comprados con los de la xiloteca, ninguna correspondió con G. coulteri y además entre ellos fueron diferentes. En la comparación histoquímica se encontró mayor contenido lipídico y glucoproteíco en las células de parénquima de las muestras de mercado que en el escaso tejido de G. coulteri. Con este trabajo se demostró la importancia de caracterizar las especies que se comercializan como medicinales mediante su análisis anatómico, para una plena identificación. La reacción histoquímica realizada permitió resaltar con mayor precisión sus diferencias estructurales y dar información acerca de su estructura celular; sin embargo, estos datos podrían complementarse con un estudio fitoquímico posterior que provea mayor información acerca de los compuestos de cada muestra.

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Eppenberger, Patrick, Francesco Galassi, and Frank Rühli. "A brief pictorial and historical introduction to guaiacum - from a putative cure for syphilis to an actual screening method for colorectal cancer." British Journal of Clinical Pharmacology 83, no. 9 (2017): 2118–19. http://dx.doi.org/10.1111/bcp.13284.

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., Liana, and Prihatini . "KORELASI ANTARA PERIKSAAN DARAH SAMAR TINJA MENGGUNAKAN ANTI-HEMOGLOBIN MANUSIA DAN PENGAMATAN MIKROSKOPIS." INDONESIAN JOURNAL OF CLINICAL PATHOLOGY AND MEDICAL LABORATORY 13, no. 1 (2018): 34. http://dx.doi.org/10.24293/ijcpml.v13i1.897.

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Test for occult blood in faeces is an important part of the early detection of colorectal cancer, gastrointestinal bleeding, and anaemia.Colorectal cancer is the second leading cause of cancer deaths in the United States. Immunochemistry method for detection of humanhaemoglobin in faeces has been developed. The advantages of this method are improving analytical sensitivity and specificity, alsoavoiding the dietary restrictions requirement, compared with benzidine test, and guaiacum test. A study was performed to correlate theresult of fecal occult blood by immunochemistry method using anti-human haemoglobin and microscopic examination of red blood cellsin faeces of outpatients in the Clinical Pathology Laboratory, Dr. Soetomo Hospital, Surabaya. Faeces of fifty one patients tested for fecaloccult blood were examined by immunochemistry method compared with microscopic examination of red blood cells. Comparison ofthe two methods was done by statistical analysis, Mc Nemar test. The correlation was measured using ROC curve. The results showed acorrelation between immunochemistry method and microscopic examination with average red blood cells (RBC) ≤ 2/hpf, p = 0.008; RBC≥ 3/hpf, p = 0.289. ROC curve showed r = 0.941. In conclusion, a significant correlation between positive results of immunochemistrymethod and microscopic examination with average red blood cells ≥ 3/hpf. Further research using larger and more representativesamples should be carried out.

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Mejía Ordóñez, Thelma María. "Composición y estructura florística en fragmentos de bosques en los municipios de Yuscarán, Oropolí y Güinope, Departamento de El Paraíso, Honduras, C.A." Ciencias Espaciales 6, no. 1 (2016): 6–22. http://dx.doi.org/10.5377/ce.v6i1.2553.

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En el Área Protegida “Reserva Biológica Yuscarán” los ecosistemas presentan una alta fragmentación quedando pocos fragmentos de su vegetación original. El objetivo fue determinar la composición y estructura florística en 5 fragmentos. Las mediciones se realizaron entre junio-agosto de 2011, en parcelas de 20 X 50m y 20 X 20m. Se registró todos los individuos con DAP ≥ 2.5 cm. Se calculó la densidad, dominancia, Índice de Diversidad. Se registró un total de 1339 individuos ≥ 2.5 cm de DAP, que representan 104 especies de 48 Familias y 81 Géneros. La abundancia y número de especies fue mayor en El Cerro Las Lechuzas. La Familia más numerosa fue la Fabaceae (leguminosas) con 19 especies. Las especies con mayor índice de valor de importancia fueron Pinus oocarpa, Pinus maximinoii, Mirospermum frutescen. Se registró un individuo con 90 cm de DAP de la especie endémica Ilex williamsii, en el Cerro El Zapotillo. Se registró 4 especies de preocupación especial Quercus bomelioides, Vitex gaumeri, Persea schiedeana y Guaiacum sanctum. El presente estudio es uno de los primeros en el área y se concluye que alberga una alta diversidad y que probablemente existen otras especies que falta registrar.Revista Ciencias Espaciales, Vol.6(1) 2013, 6-22

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Dertien, Joseph R., and Melvin R. Duvall. "Perspectives on the systematics and phylogenetics of Guaiacum (Zygophyllaceae): complexities in conservation of endangered hardwoods due to fragmentation, introgression, and intermittent gene flow." Revista Mexicana de Biodiversidad 85, no. 3 (2014): 808–22. http://dx.doi.org/10.7550/rmb.43422.

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Caicedo-Camposano, Oscar, Orlando Díaz-Romero, Dalton Cadena-Piedrahita, and Gino Galarza-Centeno. "Diseño de un sistema de producción de arroz sostenible en Babahoyo, provincia de Los Ríos, Ecuador." Killkana Técnica 3, no. 1 (2019): 19–24. http://dx.doi.org/10.26871/killkana_tecnica.v3i1.472.

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Este trabajo se ajusta para la localidad de Babahoyo, en la provincia de Los Ríos (Ecuador), con el objetivo de diseñar un sistema de producción de arroz que haga sustentable a este monocultivo en Babahoyo y establecer indicadores para la evaluación de la sustentabilidad de este sistema de producción de arroz. Se procederá bajo el siguiente esquema metodológico: con el diseño de los cercos forestales propuestos se podrá establecer un sistema de producción de arroz en donde también se realizaría rotación de cultivos. Los cercos forestales se conformarán por la siembra alternada de inga (Inga edulis Martius), guayacán (Guaiacum sanctum L.) y mango (Manguifera indica), sobre los muros perimetrales de las parcela de arroz, mientras que la rotación de cultivos será entre arroz (Oryza sativa L.) y soya (Glycine max L.), en el año se cultivará arroz en estación húmeda y soya en estación seca. Los resultados serían la transformación del monocultivo de arroz en un Sistema Sustentable de producción de arroz, lo que permitirá al productor arrocero no depender solo de la producción y comercialización de esta gramínea; con la soya y la inga el sistema permitirá también la fijación de nitrógeno en el suelo y por la naturaleza de sus raíces la soya evitará la compactación del suelo. Asimismo, se espera que el sistema agroforestal propuesto contribuya de un modo eficiente a la captura de carbono. En términos fitosanitarios, la rotación de cultivos interrumpirá los ciclos biológicos de las plagas propias de los cultivares.

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Brock, Fiona, Joanna Ostapkowicz, Christopher Bronk Ramsey, Alex Wiedenhoeft, and Caroline Cartwright. "Paired Dating of Pith and Outer Edge (Terminus) Samples from Pre-Hispanic Caribbean Wooden Sculptures." Radiocarbon 54, no. 3-4 (2012): 677–88. http://dx.doi.org/10.1017/s0033822200047342.

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Radiocarbon dating of historical and archaeological wood can be complicated, sometimes involving issues of “inbuilt” age in slow-growing woods, and/or the possibility of reuse or long delays between felling and use of the wood. Terminus dates can be provided by dating the sapwood, or the outermost edge of heartwood, while a date from the pith can give an indication of the first years of growth. A sequence of samples from specific points within the bole can be used to determine the growth rate of the tree. Such a combined dating strategy is particularly useful in cross-referencing dates from a single piece, better placing it in its chronological context. This paper reports paired or multiple dates from 11 wooden sculptures dated as part of the Pre-Hispanic Caribbean Sculptural Arts in Wood project, which studied 66 wooden artifacts attributed to the pre-colonial Taíno, the indigenous peoples of the Caribbean's Greater Antilles. The calibrated ages of the pieces published here range from ∼AD 700–1500, indicating that the Taíno were producing elaborate sculptures much earlier than previously thought. The paired or multiple dates from these carvings confirmed the accuracy of the results, and were also used to construct a growth rate model of what was expected to be a slow-growing species (Guaiacum sp.). This model demonstrates that the boles used to create the sculptures grew on average 1 cm every 6–13 yr.

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May, Thomas. "EFFETS CONTRASTÉS DES PRÉLÈVEMENTS DE BOIS SUR LA VÉGÉTATION DE FORÊT SÈCHE EN ZONE FRONTALIÈRE DOMINICO-HAÏTIENNE : COMMENT LES INTERPRÉTER ?" BOIS & FORETS DES TROPIQUES 326, no. 326 (2015): 3. http://dx.doi.org/10.19182/bft2015.326.a31279.

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En Haïti, le bois de feu et le charbon végétal sont des sources importantes d’énergie domestique, et le prélèvement de bois à des fins énergétiques repré- sente un facteur de dégradation de la forêt sèche, en plus du parcours d’ani- maux domestiques (chèvres et vaches). En République dominicaine limitrophe, tandis qu’il y a trois décennies la situa- tion était similaire, les conditions ont aujourd’hui changé et les forêts sèches montrent des signes de régénération. Dans l’extrême sud de la ligne de fron- tière entre les deux pays, près d’Anse- à-Pitre et Pedernales, l’opportunité se présente de comparer l’état de la forêt sèche des deux côtés, dans des condi- tions géologiques et climatiques très semblables. Notre étude montre que le couvert des individus arbustifs et arborés et la hauteur des arbres sont plus élevés en République dominicaine, tandis que le nombre d’individus multicaules issus de régénération végétative est plus élevé en Haïti. En général, la composition spé- cifique est similaire des deux côtés de la frontière, mais des différences significa- tives apparaissent dans les fréquences et les valeurs d’abondance-dominance. Acacia scleroxylon, Amyris elemifera, Bursera simarouba, Capparis ferruginea et Guaiacum sanctum sont plus fréquents en République dominicaine, et Acacia macracantha, Senna atomaria, Phyllosty- lon brasiliense et les deux cactacées Pilo- socereus polygonus et Opuntia sp. sont au contraire plus fréquents en Haïti. Ces différences sont imputables à l’autécolo- gie des espèces (ex. : capacité de colo- niser les terrains perturbés, capacité de régénération végétative) plutôt qu’à des préférences dans leur utilisation comme bois de feu ou de charbon.

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Melián-Rodríguez, Saravanamurugan, Meier, Kegnæs, and Riisager. "Ru-Catalyzed Oxidative Cleavage of Guaiacyl Glycerol--Guaiacyl Ether-a Representative -O-4 Lignin Model Compound." Catalysts 9, no. 10 (2019): 832. http://dx.doi.org/10.3390/catal9100832.

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The introduction of efficient and selective catalytic methods for aerobic oxidation of lignin and lignin model compounds to aromatics can extend the role of lignin applications in biorefineries. The current study focussed on the catalytic oxidative transformation of guaiacyl glycerol--guaiacyl ether (GGGE)–a -O-4 lignin model compound to produce basic aromatic compounds (guaiacol, vanillin and vanillic acid) using metal-supported catalysts. Ru/Al2O3, prepared with ruthenium(IV) oxide hydrate, showed the highest yields of the desired products (60%) in acetonitrile in a batch reactor at 160 C and 5-bar of 20% oxygen in argon. Alternative catalysts containing other transition metals (Ag, Fe, Mn, Co and Cu) supported on alumina, and ruthenium catalysts based on alternative supports (silica, spinel, HY zeolite and zirconia) gave significantly lower activities compared to Ru/Al2O3 at identical reaction conditions. Moreover, the Ru/Al2O3 catalyst was successfully reused in five consecutive reaction runs with only a minor decrease in catalytic performance.

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Umezawa, Toshiaki, and Takayoshi Higuchi. "Role of guaiacol in the degradation of arylglycerol-Î²-guaiacyl ether by Phanerochaete chrysosporium." FEMS Microbiology Letters 26, no. 1 (1985): 123–26. http://dx.doi.org/10.1111/j.1574-6968.1985.tb01577.x.

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