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https://www.readbyqxmd.com/read/29337351/selection-of-yeast-strains-for-tequila-fermentation-based-on-growth-dynamics-in-combined-fructose-and-ethanol-media
#1
J A Aldrete-Tapia, D E Miranda-Castilleja, S M Arvizu-Medrano, M Hernández-Iturriaga
The high concentration of fructose in agave juice has been associated with reduced ethanol tolerance of commercial yeasts used for tequila production and low fermentation yields. The selection of autochthonous strains, which are better adapted to agave juice, could improve the process. In this study, a 2-step selection process of yeasts isolated from spontaneous fermentations for tequila production was carried out based on analysis of the growth dynamics in combined conditions of high fructose and ethanol. First, yeast isolates (605) were screened to identify strains tolerant to high fructose (20%) and to ethanol (10%), yielding 89 isolates able to grow in both conditions...
January 16, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29313362/agave-fructans-and-oligofructose-decrease-oxidative-stress-in-brain-regions-involved-in-learning-and-memory-of-overweight-mice
#2
Elena Franco-Robles, Joel Ramírez-Emiliano, Mercedes G López
Obesity is currently a public health problem worldwide. Recently, non-reducing carbohydrates, that include β(2→1) and β(2→6) linkages in their structure, have been of particular interest in the field of obesity because they are involved in lipid metabolism. Some of these are agave fructans (AF) and oligofructose (OF). In this study, we evaluated both AF and OF on oxidative stress (OS) markers in the brain of overweight mice (OM). AF and OF decreased TBARS levels and carbonyls at different levels in hippocampus (HP), frontal cortex (FC) and cerebellum (CB) of OM...
January 9, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29210331/phytocapping-an-alternate-cover-option-for-municipal-solid-waste-landfills
#3
Abhishek Khapre, Sunil Kumar, C Rajasekaran
Landfill gases are produced due to biodegradation of organic fraction of municipal solid waste (MSW) when water comes into contact with buried wastes under prevailing anaerobic condition. To minimize the percolation of water in landfills, the conventional approach like clay capping is still practiced in India. Gas extraction system, for collection gases from landfills, is proven to be an expensive technique. Thus, "Phytocapping" to mitigate landfill gases and to minimize percolation of water into the landfill can be one of the attractive alternatives...
December 6, 2017: Environmental Technology
https://www.readbyqxmd.com/read/29192804/hecogenin-exhibits-anti-arthritic-activity-in-rats-through-suppression-of-pro-inflammatory-cytokines-in-complete-freund-s-adjuvant-induced-arthritis
#4
Deepa K Ingawale, Snehal S Patel
Hecogenin is a steroidal sapogenin isolated from the leaves of Agave genus species that plays an important role in the treatment of a variety of inflammatory diseases. The aim of the present study was to evaluate the anti-arthritic activity of hecogenin in Complete Freund's adjuvant-induced arthritis in rats. The hecogenin (40 µl of 50 µg/kg, orally) and hecogenin + fluticasone (40 µl of 25 µg/kg, each, orally) was tested against Complete Freund's adjuvant-induced arthritis in rats by evaluating various parameters such as paw volume, arthritic score, joint diameter, spleen weight, thymus weight, haematological and biochemical parameters and pro-inflammatory cytokines...
December 1, 2017: Immunopharmacology and Immunotoxicology
https://www.readbyqxmd.com/read/29183150/effect-of-agave-americana-l-on-the-human-and-aspergillus-oryzae-s2-%C3%AE-amylase-inhibitions
#5
Mouna Sahnoun, Samir Bejar, Lobna Daoud, Leila Ayadi, Faiçal Brini, Walid Saibi
Among phenolic compounds, Agave americana L. extract contained puerarin (38.4%) and p-coumaric acid (12.29%) (pCa). From the Lineweaver-Burk plots, pCa and puerarin demonstrated a competitive and a non competitive inhibitions towards human α-amylase activity, respectively. PCa exhibited a higher human inhibitory activity with an IC50 of 98.8 μM which was about 2.3 times than acarbose. Puerarin (IC50 = 3.87 μM) and pCa (IC50 = 10.16 μM) also showed an excellent inhibition for Aspergillus oryzae S2 α-amylase activity...
November 28, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29146860/complete-genome-sequence-of-a-novel-nonnodulating-rhizobium-species-isolated-from-agave-americana-l-rhizosphere
#6
Víctor Manuel Ruíz-Valdiviezo, Marco Antonio Rogel-Hernandez, Gabriela Guerrero, Clara Ivette Rincón-Molina, Luis Galdino García-Perez, Federico Antonio Gutiérrez-Miceli, Juan José Villalobos-Maldonado, Aline López-López, Esperanza Martinez-Romero, Reiner Rincón-Rosales
We report here the complete genome sequence of Rhizobium sp. strain ACO-34A, isolated from Agave americana L. rhizosphere. No common nod genes were found, but there were nif genes for nitrogen fixing. A low average nucleotide identity to reported species supports its designation as a novel Rhizobium species that has a complete ribosomal operon in a plasmid.
November 16, 2017: Genome Announcements
https://www.readbyqxmd.com/read/29138000/physiometabolic-effects-of-agave-salmiana-fructans-evaluated-in-wistar-rats
#7
A I Castillo Andrade, C Rivera Bautista, C Godínez Hernández, Ruiz Cabrera, C Fuentes Ahumada, E García Chávez, A Grajales Lagunes
A prospective completely randomized experimental study was conducted using 48 animals to evaluate the physiometabolic effects of Agave salmiana fructans as a dietary supplement in healthy Wistar rats. Five fructans concentrations from 5 to 20% (w/w) and one control were used in the rats' diet and were divided into six groups (n=8 rats/group). The treatments were carried out for 35 days, during which glucose, cholesterol, triglycerides, body-weight gain, food intake, fecal excretion, organ weights, renal and hepatic functions and a histological analysis of the cecum were evaluated...
November 11, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29117217/morphological-and-genetic-divergence-between-agave-inaequidens-a-cupreata-and-the-domesticated-a-hookeri-analysis-of-their-evolutionary-relationships
#8
Carmen J Figueredo-Urbina, Alejandro Casas, Ignacio Torres-García
Agave inaequidens and A. cupreata are wild species with some populations under incipient management, while A. hookeri is exclusively cultivated, used for producing the fermented beverage pulque. These species are closely related and sympatric members of the Crenatae group, but taxonomists have previously hypothesized that A. inaequidens is the most probable ancestor of A. hookeri. Our study aims at evaluating patterns of morphological and genetic divergence among populations of the three species, in order to analyze their ecological and possible evolutionary relationships...
2017: PloS One
https://www.readbyqxmd.com/read/29072882/rita-the-italian-severe-uncontrolled-asthma-registry
#9
Sara Maio, Sandra Baldacci, Megon Bresciani, Marzia Simoni, Manuela Latorre, Nicola Murgia, Fabrizio Spinozzi, Mariachiara Braschi, Leonardo Antonicelli, Barbara Brunetto, Patrizia Iacovacci, Paolo Roazzi, Carlo Pini, Mario Pata, Lidia La Grasta, Pierluigi Paggiaro, Giovanni Viegi
BACKGROUND: The Italian severe/uncontrolled asthma (SUA) web-based registry encompasses demographic, clinical, functional, inflammatory data; it aims to raise SUA awareness, identifying specific phenotypes and promoting optimal care. METHODS: 493 adult patients from 27 Italian centres (recruited in 2011-2014) were analyzed. RESULTS: Mean age was 53.8yrs. SUA patients were more frequently female (60.6%), with allergic asthma (83.1%). About 30% showed late onset of asthma diagnosis/symptoms (>40yrs); the mean age for asthma symptoms onset was 30...
October 26, 2017: Allergy
https://www.readbyqxmd.com/read/29065326/effect-of-ultrasound-pre-treatment-on-the-physicochemical-composition-of-agave-durangensis-leaves-and-potential-enzyme-production
#10
M G Contreras-Hernández, L A Ochoa-Martínez, J G Rutiaga-Quiñones, N E Rocha-Guzmán, T E Lara-Ceniceros, J C Contreras-Esquivel, L A Prado Barragán, O M Rutiaga-Quiñones
Approximately 1 million tons of agave plants are processed annually by the Mexican tequila and mezcal industry, generating vast amounts of agroindustrial solid waste. This type of lignocellulosic biomass is considered to be agroindustrial residue, which can be used to produce enzymes, giving it added value. However, the structure of lignocellulosic biomass makes it highly recalcitrant, and results in relatively low yield when used in its native form. The aim of this study was to investigate an effective pre-treatment method for the production of commercially important hydrolytic enzymes...
October 16, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29054064/continuous-hydrogen-and-methane-production-from-agave-tequilana-bagasse-hydrolysate-by-sequential-process-to-maximize-energy-recovery-efficiency
#11
Virginia Montiel Corona, Elías Razo-Flores
Continuous H2 and CH4 production in a two-stage process to increase energy recovery from agave bagasse enzymatic-hydrolysate was studied. In the first stage, the effect of organic loading rate (OLR) and stirring speed on volumetric hydrogen production rate (VHPR) was evaluated in a continuous stirred tank reactor (CSTR); by controlling the homoacetogenesis with the agitation speed and maintaining an OLR of 44 g COD/L-d, it was possible to reach a VHPR of 6 L H2/L-d, equivalent to 1.34 kJ/g bagasse...
October 10, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29049373/barcoding-the-butterflies-of-southern-south-america-species-delimitation-efficacy-cryptic-diversity-and-geographic-patterns-of-divergence
#12
Pablo D Lavinia, Ezequiel O Núñez Bustos, Cecilia Kopuchian, Darío A Lijtmaer, Natalia C García, Paul D N Hebert, Pablo L Tubaro
Because the tropical regions of America harbor the highest concentration of butterfly species, its fauna has attracted considerable attention. Much less is known about the butterflies of southern South America, particularly Argentina, where over 1,200 species occur. To advance understanding of this fauna, we assembled a DNA barcode reference library for 417 butterfly species of Argentina, focusing on the Atlantic Forest, a biodiversity hotspot. We tested the efficacy of this library for specimen identification, used it to assess the frequency of cryptic species, and examined geographic patterns of genetic variation, making this study the first large-scale genetic assessment of the butterflies of southern South America...
2017: PloS One
https://www.readbyqxmd.com/read/29026999/identification-of-a-novel-vitivirus-from-grapevines-in-new-zealand
#13
Arnaud G Blouin, Sandi Keenan, Kathryn R Napier, Roberto A Barrero, Robin M MacDiarmid
We report a sequence of a novel vitivirus from Vitis vinifera obtained using two high-throughput sequencing (HTS) strategies on RNA. The initial discovery from small-RNA sequencing was confirmed by HTS of the total RNA and Sanger sequencing. The new virus has a genome structure similar to the one reported for other vitiviruses, with five open reading frames (ORFs) coding for the conserved domains described for members of that genus. Phylogenetic analysis of the complete genome sequence confirmed its affiliation to the genus Vitivirus, with the closest described viruses being grapevine virus E (GVE) and Agave tequilana leaf virus (ATLV)...
October 12, 2017: Archives of Virology
https://www.readbyqxmd.com/read/29023758/biological-activities-of-agave-by-products-and-their-possible-applications-in-food-and-pharmaceuticals
#14
REVIEW
Julio Cesar López-Romero, Jesús Fernando Ayala-Zavala, Gustavo Adolfo González-Aguilar, Etna Aida Peña-Ramos, Humberto González-Ríos
Agave leaves are considered a by-product of alcoholic beverage production (tequila, mezcal and bacanora) because they are discarded during the production process, despite accounting for approximately 50 % of the total plant weight. These by-products constitute a potential source of Agave extracts rich in bioactive compounds, such as saponins, phenolic compounds and terpenes, and possess different biological effects, as demonstrated by in vitro and in vivo tests (e.g., antimicrobial, antifungal, antioxidant, anti-inflammatory, antihypertensive, immunomodulatory, antiparasitic, and anticancer activity)...
October 11, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28958510/chlorogenic-acid-oxidation-induced-greening-of-sunflower-butter-cookies-as-a-function-of-different-sweeteners-and-storage-conditions
#15
Sihui Liang, Lilian M Were
Sunflower butter use as an allergen-free alternative to tree and legume nut butter in baking is limited by chlorogenic acid induced greening that occurs at alkaline pH. Limited information is available on controlling this greening in a food matrix. This study examined how different liquid sweeteners and relative humidity influenced greening of sunflower butter cookies. Doughs had similar initial pH (7.52-7.66) which increased to 8.44-9.13 after baking as ranked: xylitol>maple syrup>corn syrup>honey>agave syrup...
February 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/28917907/microencapsulation-of-eugenia-uniflora-l-juice-by-spray-drying-using-fructans-with-different-degrees-of-polymerisation
#16
R I Ortiz-Basurto, M E Rubio-Ibarra, J A Ragazzo-Sanchez, C I Beristain, M Jiménez-Fernández
The objective of this work was to microencapsulate pitanga (Eugenia uniflora L.) juice by spray drying, using High Performance Agave Fructans (HPAF) and High Degree of Polymerisation Agave Fructans (HDPAF) and maltodextrin (MD), respectively, as the wall materials. The physicochemical and antioxidant properties of the capsules during storage at various temperatures were evaluated. The microparticles developed using fructans HPAF and HDPAF, exhibited similar physicochemical and flow properties to those presented by the microparticles prepared with MD...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28916568/perspective-the-paradox-in-dietary-advanced-glycation-end-products-research-the-source-of-the-serum-and-urinary-advanced-glycation-end-products-is-the-intestines-not-the-food
#17
Luanne R DeChristopher
Inconsistent research results have impeded our understanding of the degree to which dietary advanced glycation end products (dAGEs) contribute to chronic disease. Early research suggested that Western-style fast foods, including grilled and broiled meats and French fries, contain high levels of proinflammatory advanced glycation end products (AGEs). However, recent studies with state-of-the-art ultraperformance LC-tandem mass spectrometry (UPLC-MS) found that there is no evidence that these foods have elevated levels of dAGEs relative to other foods...
September 2017: Advances in Nutrition
https://www.readbyqxmd.com/read/28869653/purpuric-agave-dermatitis
#18
Tiffany Tello, Noel Td Chiu, Jeffrey P North
A 53 year old man presented with a 4 day history of a rapidly progressive, painful purpuric eruption on the lower extremities. The symptoms started as red to purple papules, some in a linear array, on the anterior and medial lower extremities several hours after working outside his house clearing foliage. The posterior legs were completely spared. Over the ensuing days, the lesions continued to progress, coalescing into large confluent purpuric plaques with surrounding purpuric papules and admixed multi-loculated hemorrhagic bullae (Figure 1)...
September 4, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28847133/physical-properties-of-botanical-surfactants
#19
Lillian Espíndola Müller, Gustavo Schiedeck
Some vegetal species have saponins in their composition with great potential to be used as natural surfactants in organic crops. This work aims to evaluate some surfactants physical properties of Quillaja brasiliensis and Agave angustifolia, based on different methods of preparation and concentration. The vegetal samples were prepared by drying and grinding, frozen and after chopped or used fresh and chopped. The neutral bar soap was used as a positive control. The drying and grinding of samples were the preparation method that resulted in higher foam column height in both species but Q...
January 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/28840862/alternative-sugars-agave-nectar
#20
(no author information available yet)
No abstract text is available yet for this article.
August 25, 2017: British Dental Journal
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