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https://www.readbyqxmd.com/read/29224253/phytochemical-composition-and-biological-activities-of-dyssodia-tagetiflora-lag
#1
Ana María García-Bores, Amira Arciniegas-Arciniegas, Alma Reyna Campos, Carlos Céspedes-Acuña, Betsaida Avila-Suárez, Julio Alarcón-Enos, Saul Flores-Maya, Adriana Montserrat Espinosa-González, Alfonso Romo de Vivar-Romo, Carlos Pérez Plasencia, José Guillermo Avila-Acevedo
While plants of the genus Dyssodia are used by man to a certain extent, few phytochemical and pharmacological studies have been performed with species of this genus. D. tagetiflora is an endemic plant of Mexico and has been used as fodder. The aim of this research was to isolate and identify the main bioactive components and evaluate the insecticidal, antioxidant, genotoxic and cytoprotective activities of D. tagetiflora. The isolated substances included an essential oil composed of six monoterpenes, and extracts containing two flavonols, three flavonol-glycosides and four thiophenes...
December 10, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29224176/validation-of-a-method-for-estimating-energy-expenditure-during-walking-in-middle-aged-adults
#2
Nathan Caron, Teddy Caderby, Nicolas Peyrot, Chantal Verkindt, Georges Dalleau
PURPOSE: The aim of this study was to test the validity of a method using an inertial measurement unit for estimating activity-related energy expenditure (AEE) during walking in middle-aged adults. METHODS: Twenty healthy middle-aged participants completed different treadmill walking trials with an inertial measurement unit adhered to their lower back. Gas exchange was monitored with indirect calorimetry. Mechanical data were used to estimate AEE from an algorithm developed by Bouten et al...
December 9, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29224061/cyclic-fatigue-and-torsional-strength-of-three-different-thermally-treated-reciprocating-nickel-titanium-instruments
#3
Murilo Priori Alcalde, Marco Antonio Hungaro Duarte, Clovis Monteiro Bramante, Bruno Carvalho de Vasconselos, Mario Tanomaru-Filho, Juliane Maria Guerreiro-Tanomaru, Jader Carvalho Pinto, Marcus Vinicius Reis Só, Rodrigo Ricci Vivan
OBJECTIVES: The aim of this study was to evaluate the cyclic and torsional fatigue resistance of the reciprocating single-file systems Reciproc Blue 25.08 (VDW GmbH, Munich, Germany), Prodesign R 25.06 (Easy Dental Equipment, Belo Horizonte, Brazil), and WaveOne Gold 25.07 (Dentsply/Tulsa Dental Specialties, Tulsa, OK, USA). MATERIALS AND METHODS: Sixty reciprocating instruments of the systems Reciproc Blue R25 (RB #25 .08 taper), Prodesign R (PDR #25 .06 taper), and WaveOne Gold (WOG #25 ...
December 9, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29223919/-temporal-diversity-dynamics-of-the-arbuscular-mycorrhizal-fungi-of-larrea-tridentata-sesse-mocino-ex-dc-coville-in-a-semi-arid-ecosystem
#4
Genoveva Hernández-Zamudio, Jorge Sáenz-Mata, Alejandro Moreno-Reséndez, Gamaliel Castañeda-Gaytán, Alfredo Ogaz, Santos Carballar-Hernández, Laura Hernández-Cuevas
Arbuscular mycorrhizal fungi (AMF) of arid and semiarid ecosystems are important for the development of plants that grow under biotic stress in wild or in agro-ecosystems. There is little information on the temporal diversity of these organisms in perennial plants from arid ecosystems in northern Mexico. On this study, the mycorrhizal colonization and the temporal diversity of AMF in the rhizosphere of Larrea tridentata, perennial plant abundant in the Chihuahuan Desert region were explored. Samples of the rhizosphere and roots of fifteen plants in each of the three sampling dates during the 2015 year were obtained...
December 6, 2017: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/29223892/liquid-chromatography-quadrupole-time-of-flight-mass-spectrometry-determination-of-six-pharmaceuticals-in-vegetal-biota-uptake-study-in-lavandula-dentata
#5
Sofía Barreales-Suárez, Manuel Callejón-Mochón, Stéphane Azoulay, Miguel Ángel Bello-López, Rut Fernández-Torres
A procedure based on microwave assisted extraction for the determination of 6 pharmaceuticals in samples of Lavandula dentata, Salicornia ramosissima and Juncus sp. by liquid chromatography-quadrupole time of flight mass spectrometry (LC-QTOF/MS) was optimized and validated. Best results were obtained using microwave assisted extraction of 1.0g of homogeneous lyophilized samples and 5mL of a mixture ACN:H2O (1:1 v/v) as extracting solvent. Analytical recoveries ranged from 60 to 107% with relative standard deviation (RSD) lower than 15%...
December 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29223878/constitutive-gibberellin-response-in-grafted-tomato-modulates-root-to-shoot-signaling-under-drought-stress
#6
Lucas Aparecido Gaion, Carolina Cristina Monteiro, Flávio José Rodrigues Cruz, Davi Rodrigo Rossatto, Isabel López-Díaz, Esther Carrera, Joni Esrom Lima, Lázaro Eustáquio Pereira Peres, Rogério Falleiros Carvalho
Plants are sessile organisms that must perceive and respond to various environmental constraints throughout their life cycle. Among these constraints, drought stress has become the main limiting factor to crop production around the world. Water deprivation is perceived primarily by the roots, which efficiently signal the shoot to trigger drought responses in order to maximize a plant's ability to survive. In this study, the tomato (Solanum lycopersicum L.) mutant procera (pro), with a constitutive response to gibberellin (GA), and its near isogenic line cv...
December 6, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29223849/subcellular-distribution-of-molybdenum-ultrastructural-and-antioxidative-responses-in-soybean-seedlings-under-excess-molybdenum-stress
#7
Shoujun Xu, Chengxiao Hu, Qiling Tan, Shiyu Qin, Xuecheng Sun
Some studies have shown that excess molybdenum (Mo) could produce toxic effects on plants. However, little is known about the subcellular distribution of Mo and cell ultrastructure within plants under excess Mo stress. Here, we comprehensively analyzed the changes of Mo distribution in subcellular fractions, cell ultrastructure and antioxidant enzymes in leaves and roots of soybean seedlings in response to excess Mo stress. The results showed that roots exhibited higher Mo accumulation than leaves at the 100 mg L-1 Mo level, about 38...
December 5, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29223821/germination-physiological-and-biochemical-responses-of-acacia-seedlings-acacia-raddiana-and-acacia-tortilis-to-petroleum-contaminated-soils
#8
Thanh Hoai Tran, Einav Mayzlish Gati, Amram Eshel, Gidon Winters
Along the arid Arava, southern Israel, acacia trees (Acacia raddiana and Acacia tortilis) are considered keystone species. Yet they are threatened by the ongoing aquifer depletion for agriculture, the conversion of natural land to agricultural land, seed infestation by bruchid beetles, and the reduction in precipitation level in the region. In the acacia dominated Evrona reserve (southern Arava), adding to these threats are recurrent oil spills from an underground pipeline. We report here a study of the effects of contaminated soils, from a recent (December 2014) and a much older (1975) oil spills...
December 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29223733/mitochondrial-pore-opening-and-loss-of-ca2-exchanger-nclx-levels-occur-after-frataxin-depletion
#9
R Purroy, E Britti, F Delaspre, J Tamarit, J Ros
Frataxin-deficient neonatal rat cardiomyocytes and dorsal root ganglia neurons have been used as cell models of Friedreich ataxia. In previous work we show that frataxin depletion resulted in mitochondrial swelling and lipid droplet accumulation in cardiomyocytes, and compromised DRG neurons survival. Now, we show that these cells display reduced levels of the mitochondrial calcium transporter NCLX that can be restored by calcium-chelating agents and by external addition of frataxin fused to TAT peptide. Also, the transcription factor NFAT3, involved in cardiac hypertrophy and apoptosis, becomes activated by dephosphorylation in both cardiomyocytes and DRG neurons...
December 6, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29223694/atraumatic-versus-conventional-lumbar-puncture-needles-a-systematic-review-and-meta-analysis
#10
Siddharth Nath, Alex Koziarz, Jetan H Badhiwala, Waleed Alhazzani, Roman Jaeschke, Sunjay Sharma, Laura Banfield, Ashkan Shoamanesh, Sheila Singh, Farshad Nassiri, Wieslaw Oczkowski, Emilie Belley-Côté, Ray Truant, Kesava Reddy, Maureen O Meade, Forough Farrokhyar, Malgorzata M Bala, Fayez Alshamsi, Mette Krag, Itziar Etxeandia-Ikobaltzeta, Regina Kunz, Osamu Nishida, Charles Matouk, Magdy Selim, Andrew Rhodes, Gregory Hawryluk, Saleh A Almenawer
BACKGROUND: Atraumatic needles have been proposed to lower complication rates after lumbar puncture. However, several surveys indicate that clinical adoption of these needles remains poor. We did a systematic review and meta-analysis to compare patient outcomes after lumbar puncture with atraumatic needles and conventional needles. METHODS: In this systematic review and meta-analysis, we independently searched 13 databases with no language restrictions from inception to Aug 15, 2017, for randomised controlled trials comparing the use of atraumatic needles and conventional needles for any lumbar puncture indication...
December 6, 2017: Lancet
https://www.readbyqxmd.com/read/29223653/effects-of-cardiac-rehabilitation-on-heart-rate-recovery-of-patients-undergoing-a-cardiac-rehabilitation-programme-after-acute-coronary-syndrome
#11
Tiffany Astolfi, Fabio Borrani, Milos Savcic, Vincent Gremeaux, Grégoire P Millet
BACKGROUND: An efficient cardiac rehabilitation programme (CRP) can improve the functional ability of patients after acute coronary syndrome (ACS). OBJECTIVE: To examine the effect of a CRP on parasympathetic reactivation and heart rate recovery (HRR) measured after a 6-min walk test (6MWT), and correlation with 6MWT distance and well-being after ACS. METHODS: Eleven normoweight patients after ACS (BMI < 25kg/m2; 10 males; mean [SD] age 61 [9] years) underwent an 8-week CRP...
December 6, 2017: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/29223635/three-dimensional-superimposition-for-patients-with-facial-palsy-an-innovative-method-for-assessing-the-success-of-facial-reanimation-procedures
#12
C Sforza, E Ulaj, D M Gibelli, F Allevi, V Pucciarelli, F Tarabbia, D Ciprandi, G Dell'Aversana Orabona, C Dolci, F Biglioli
Facial palsy is a severe condition that may be ameliorated by facial reanimation, but there is no consensus about how to judge its success. In this study we aimed to test a new method for assessing facial movements based on 3-dimensional analysis of the facial surfaces. Eleven patients aged between 42 and 77 years who had recently been affected by facial palsy (onset between 6 and 18 months) were treated by an operation based on triple innervation: the masseteric to temporofacial nerve branch, 30% of the hypoglossal fibres to the cervicofacial nerve branch, and the contralateral facial nerve through two cross-face sural nerve grafts...
December 6, 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/29223345/synergy-between-root-hydrotropic-response-and-root-biomass-in-maize-zea-mays-l-enhances-drought-avoidance
#13
Delfeena Eapen, Jesús Martínez-Guadarrama, Oralia Hernández-Bruno, Leonardo Flores, Jorge Nieto-Sotelo, Gladys I Cassab
Roots of higher plants change their growth direction in response to moisture, avoiding drought and gaining maximum advantage for development. This response is termed hydrotropism. There have been few studies of root hydrotropism in grasses, particularly in maize. Our goal was to test whether an enhanced hydrotropic response of maize roots correlates with a better adaptation to drought and partial/lateral irrigation in field studies. We developed a laboratory bioassay for testing hydrotropic response in primary roots of 47 maize elite DTMA (Drought Tolerant Maize for Africa) hybrids...
December 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29223343/biotic-factors-that-induce-the-tomato-ve1-r-gene
#14
Christian Danve Castroverde, Xin Xu, Ross N Nazar, Jane Robb
In tomato, Verticillium resistance is determined by the Ve gene locus encoding two leucine-rich repeat-receptor-like proteins (Ve1, Ve2). The resistance function usually is attributed to Ve1 alone, with two known alleles: Ve1, encoding a resistance protein, and ve1, with a premature stop codon encoding a truncated product. We have examined further Ve-gene expression in resistant and susceptible near-isolines of Verticillium-infected Craigella tomatoes, using both quantitative RT-PCR and an alternative RFLP assay...
December 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29223338/molecular-cloning-and-expression-analysis-of-aquaporin-genes-in-pearl-millet-pennisetum-glaucum-l-r-br-genotypes-contrasting-in-their-transpiration-response-to-high-vapour-pressure-deficits
#15
Palakolanu Sudhakar Reddy, Murugesan Tharanya, Kaliamoorthy Sivasakthi, Mallayee Srikanth, C Tom Hash, Jana Kholova, Kiran K Sharma, Vincent Vadez
Pearl millet is a crop of the semi-arid tropics having high degree of genetic diversity and variable tolerance to drought stress. To investigate drought tolerance mechanism that possibly accounts for differences in drought tolerance, four recombinant inbred lines from a high resolution cross (HRC) were selected for variability in their transpiration rate (Tr) response to vapour pressure deficit (VPD) conditions. The differential Tr response of the genotypes to increased VPD conditions was used to classify the genotypes as sensitive or insensitive to high VPD...
December 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29223333/constitutive-expression-of-brassica-juncea-annexin-annbj2-confers-salt-tolerance-and-glucose-and-aba-insensitivity-in-mustard-transgenic-plants
#16
Israr Ahmed, Deepanker Yadav, Pawan Shukla, T V Vineeth, P C Sharma, P B Kirti
Annexins belong to a plasma membrane binding (in a calcium dependent manner), multi-gene family of proteins, which play ameliorating roles in biotic and abiotic stresses. The expression of annexin AnnBj2 of Indian mustard is tissue specific with higher expression in roots and under treatments with sodium chloride and abscisic acid (ABA) at seedling stage. The effect of constitutive expression of AnnBj2 in mustard was analyzed in detail. AnnBj2 OE (over expression) plants exhibited insensitivity to ABA, glucose and sodium chloride...
December 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29223230/depth-of-focus-after-implantation-of-spherical-or-aspheric-intraocular-lenses-in-hyperopic-and-emmetropic-patients
#17
Gernot Steinwender, Sanja Strini, Wilfried Glatz, Gerold Schwantzer, Bertram Vidic, Oliver Findl, Andreas Wedrich, Navid Ardjomand
PURPOSE: To evaluate whether hyperopic patients with short axial length and high dioptric intraocular lens (IOL) power can achieve a higher depth of focus after implantation of a monofocal spherical or aspheric IOL than emmetropic patients. SETTING: Department of Ophthalmology, Medical University Graz, Graz, Austria. DESIGN: Prospective case series. METHODS: Patients presenting for cataract surgery were divided by calculated IOL power into a hyperopic (≥22...
November 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29223136/allele-exchange-at-the-epsps-locus-confers-glyphosate-tolerance-in-cassava
#18
Aaron W Hummel, Raj Deepika Chauhan, Tomas Cermak, Andrew M Mutka, Anupama Vijayaraghavan, Adam Boyher, Colby G Starker, Rebecca Bart, Daniel F Voytas, Nigel J Taylor
Effective weed control can protect yields of cassava (Manihot esculenta) storage roots (Doll and Piedrahita Cañola, 1978). Farmers could benefit from using herbicide with a tolerant cultivar. We applied traditional transgenesis and gene editing to generate robust glyphosate tolerance in cassava. By comparing promoters regulating expression of transformed 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) genes with various paired amino acid substitutions, we found that strong constitutive expression is required to achieve glyphosate tolerance during in vitro selection and in whole cassava plants...
December 9, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/29223082/deep-rooted-apple-trees-decrease-groundwater-recharge-in-the-highland-region-of-the-loess-plateau-china
#19
Zhiqiang Zhang, Min Li, Bingcheng Si, Hao Feng
Unlike recharge in shallow rooted ecosystems, estimating the groundwater recharge beneath deep rooted plants that absorb water from deep soil remains difficult. The purpose of this research is to develop an approach to estimate the groundwater recharge beneath deep-rooted vegetation by combining water mass balance and chloride mass balance (CMB) and to quantify how the conversion of shallow-rooted cropland to deep-rooted apple orchards changes groundwater recharge. The proposed groundwater recharge rate under deep-rooted vegetation in this study is the difference between the groundwater recharge rate in a cropland (obtained using CMB) and the mean annual soil water storage deficit beneath an adjacent deep-rooted vegetation...
December 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29223058/discrimination-of-geographical-origin-and-detection-of-adulteration-of-kudzu-root-by-fluorescence-spectroscopy-coupled-with-multi-way-pattern-recognition
#20
Leqian Hu, Shuai Ma, Chunling Yin
In this work, fluorescence spectroscopy combined with multi-way pattern recognition techniques were developed for determining the geographical origin of kudzu root and detection and quantification of adulterants in kudzu root. Excitation-emission (EEM) spectra were obtained for 150 pure kudzu root samples of different geographical origins and 150 fake kudzu roots with different adulteration proportions by recording emission from 330 to 570nm with excitation in the range of 320-480nm, respectively. Multi-way principal components analysis (M-PCA) and multilinear partial least squares discriminant analysis (N-PLS-DA) methods were used to decompose the excitation-emission matrices datasets...
December 5, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
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