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https://www.readbyqxmd.com/read/29036673/enhanced-desiccation-tolerance-in-mature-cultures-of-the-streptophytic-green-alga-zygnema-circumcarinatum-revealed-by-transcriptomics
#1
Martin Rippin, Burkhard Becker, Andreas Holzinger
Desiccation tolerance is commonly regarded as one of the key features for the colonization of terrestrial habitats by green algae and the evolution of land plants. Extensive studies, focused mostly on physiology, have been carried out assessing the desiccation tolerance and resilience of the streptophytic genera Klebsormidium and Zygnema. Here we present transcriptomic analyses of Zygnema circumcarinatum exposed to desiccation stress. Cultures of Z. circumcarinatum, grown in liquid medium or on agar plates, were desiccated at ∼86% relative air humidity until Y(II) ceased...
September 22, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29036658/dying-piece-by-piece-carbohydrate-dynamics-in-aspen-populus-tremuloides-seedlings-under-severe-carbon-stress
#2
Erin Wiley, Günter Hoch, Simon M Landhäusser
Carbon starvation as a mechanism of tree mortality is poorly understood. We exposed seedlings of aspen (Populus tremuloides) to complete darkness at 20 or 28 °C to identify minimum non-structural carbohydrate (NSC) concentrations at which trees die and to see if these levels vary between organs or with environmental conditions. We also first grew seedlings under different shade levels to determine if size affects survival time under darkness due to changes in initial NSC concentration and pool size and/or respiration rates...
September 27, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29036570/radon-in-the-exhaled-air-of-patients-in-radon-therapy
#3
Herbert Lettner, Alexander Hubmer, Werner Hofmann, Julia Landrichinger, Martin Gaisberger, Renate Winkler-Heil
In the Gastein valley, numerous facilities use radon for the treatment of various diseases either by exposure to radon in air or in radon rich thermal water. In this study, six test persons were exposed to radon thermal water in a bathtub and the time-dependent radon activity concentration in the exhaled air was recorded. At temperatures between 38°C and 40°C, the radon activity concentration in the water was about 900 kBq/m3 in a total volume of 600 l, where the patients were exposed for 20 min, while continuously sampling the exhaled air during the bathing and 20 min thereafter...
September 23, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29036552/using-foliar-spectral-properties-to-assess-the-effects-of-drought-on-plant-water-potential
#4
Lorenzo Cotrozzi, John J Couture, Jeannine Cavender-Bares, Clayton C Kingdon, Beth Fallon, George Pilz, Elisa Pellegrini, Cristina Nali, Philip A Townsend
Drought frequency is predicted to increase in future environments. Leaf water potential (ΨLW) is commonly used to evaluate plant water status, but traditional measurements can be logistically difficult and require destructive sampling. We used reflectance spectroscopy to characterize variation in ΨLW of Quercus oleoides Schltdl. & Cham. under differential water availability and tested the ability to predict pre-dawn ΨLW (PDΨLW) using spectral data collected hours after pressure chamber measurements on dark-acclimated leaves...
September 19, 2017: Tree Physiology
https://www.readbyqxmd.com/read/29035764/suitability-of-fluorescent-whitening-compounds-fwcs-as-indicators-of-human-faecal-contamination-from-septic-tanks-in-rural-catchments
#5
Donata Dubber, Laurence W Gill
Rural river catchments are impacted by diffuse pollution sources from agricultural practices and on-site domestic wastewater treatment systems (DWWTS), mainly septic tanks. Methods that can distinguish between contamination sources will significantly increase water management efficiency as they will allow for the development and application of targeted remediation measures. Fluorescent whitening compounds (FWC), are used as optical brighteners in laundry detergents and enter the environment through the discharge of domestic wastewater effluents...
October 4, 2017: Water Research
https://www.readbyqxmd.com/read/29035602/effect-of-pre-exercise-ingestion-of-modified-amylomaize-starch-on-glycemic-response-while-cycling
#6
Rachel B Parks, Hector F Angus, Douglas S King, Rick Sharp
Amylomaize-7 is classified as a resistant corn starch and is 68% digestible. When modified by partial hydrolysis in ethanol and hydrochloric acid, its digestibility is 92%, yet retains its low glycemic and insulinemic properties. The purpose of this study was to characterize the metabolic response when modified amylomaize-7 or dextrose is consumed in the hour before exercise, and to compare the effect on performance of a brief high-intensity cycling trial. Ten male trained cyclists were given 1 g/kg body mass of dextrose (DEX) or modified amylomaize-7 (AMY-7) or a flavored water placebo (PL) 45 min prior to exercise on a cycle ergometer...
October 16, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29035573/field-based-investigation-on-phytoremediation-potentials-of-lemna-minor-and-azolla-filiculoides-in-tropical-semiarid-regions-case-of-ethiopia
#7
Elfu Amare, Fassil Kebede, Tesfay Berihu, Worku Mulat
This study investigated the concurrent accumulation of eight heavy metals by two floating aquatic macrophytes (Lemna minor and Azolla filiculoides) cultivated in ambient media and blended wastewaters in the semiarid regions of Ethiopia. Both species accumulated heavy metals in varying degrees with a significant concentration gradient within the immediate water media. Highest bioconcentration factor was determined for Mn and Fe in both plants. Results revealed that L. minor was high phytoaccumulator for Fe, Mn, Zn and Co but moderate for Cd, Cu, Ni and Cr...
October 16, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29035566/sulfidation-of-iron-based-materials-a-review-of-processes-and-implications-for-water-treatment-and-remediation
#8
Dimin Fan, Ying Lan, Paul G Tratnyek, Richard L Johnson, Jan Filip, Denis Michael O'Carroll, Ariel Nunez Garcia, Abinash Agrawal
Iron-based materials used in water treatment and groundwater remediation-especially micro- and nano-sized zerovalent iron (nZVI)-can be more effective when modified with lower-valent forms of sulfur (i.e., "sulfidated"). Controlled sulfidation for this purpose (using sulfide, dithionite, etc.) is the main topic of this review, but insights are derived by comparison with related and comparatively well-characterized processes such as corrosion of iron in sulfidic waters and abiotic natural attenuation by iron sulfide minerals...
October 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29035523/current-stormwater-harvesting-guidelines-are-inadequate-for-mitigating-risk-from-campylobacter-during-non-potable-reuse-activities
#9
Heather Murphy, Ze Meng, Rebekah Henry, Ana Deletic, David Mccarthy
Campylobacter is a pathogen frequently detected in urban stormwater worldwide. It is one of the leading causes of enteric disease in many developed countries and is the leading cause of enteric disease in Australia. Prior to harvesting stormwater, adequate treatment is necessary to mitigate risks derived from such harmful pathogens. The goal of this research was to estimate the health risks associated with the exposure to Campylobacter when harvesting urban stormwater for toilet flushing and irrigation activities, and the role treatment options play in limiting risks...
October 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29035303/optimization-of-bicomponent-electrospun-fibers-for-therapeutic-use-post-treatments-to-improve-chemical-and-biological-stability
#10
Antonio Papa, Vincenzo Guarino, Valentina Cirillo, Olimpia Oliviero, Luigi Ambrosio
Bicomponent electrospun nanofibers based on the combination of synthetic (i.e., aliphatic polyesters such as polycaprolactone (PCL)) and natural proteins (i.e., gelatin) have been extensively investigated as temporary platforms to instruct cells by the release of molecular/pharmaceutical signals for the regeneration of several tissues. Here, water soluble proteins (i.e., gelatin), strictly embedded to PCL, act as carriers of bioactive molecules, thus improving bioavailability and supporting cell activities during in vitro regeneration...
October 16, 2017: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/29034747/long-term-supplementation-of-rhodiola-kirilowii-extracts-during-pregnancy-and-lactation-does-not-affect-mother-health-status
#11
Sławomir Lewicki, Ewa Skopińska-Różewska, Aneta Lewicka, Robert Zdanowski
Antibiotics treatment during pregnancy and lactation is problematic. The alternative to the antibiotic treatment is the use of plant-derived supplements, which stimulate immune system to prevent and eliminate bacterial infection. Here we evaluated the effect of long-term use of Rhodiola kirilowii on the health of mouse mothers. Pregnant mice were fed daily, for whole pregnancy and for 28 days after giving birth, with Rhodiola kirilowii water (RKW) or hydroalcoholic extract (RKW-A) (at 20 mg of extracts/kg)...
October 16, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29034339/a-method-for-the-production-of-large-volumes-of-waf-and-cewaf-for-dosing-mesocosms-to-understand-marine-oil-snow-formation
#12
Terry L Wade, Maya Morales-McDevitt, Gopal Bera, Dawai Shi, Stephen Sweet, Binbin Wang, Gerado Gold-Bouchot, Antonietta Quigg, Anthony H Knap
Marine oil snow (MOS) formation is a mechanism to transport oil from the ocean surface to sediments. We describe here the use of 110L mesocosms designed to mimic oceanic parameters during an oil spill including the use of chemical dispersants in order to understand the processes controlling MOS formation. These experiments were not designed to be toxicity tests but rather to illustrate mechanisms. This paper focuses on the development of protocols needed to conduct experiments under environmentally relevant conditions to examine marine snow and MOS...
October 2017: Heliyon
https://www.readbyqxmd.com/read/29034338/desorption-of-harmful-hydrocarbon-compounds-in-soil-using-micron-sized-magnetic-particles-and-high-frequency-magnetic-fields
#13
Bailey S Tye, Rushi J Vyas
This research looks at the use of high frequency (HF) magnetic fields to desorb/reduce harmful chemical compounds within gasoline and diesel that commonly leak out of underground storage tanks. Using a multi-strand coil design, measured magnetic fields of over 3 kilo-amperes per meter are generated at an optimal frequency of 117 kHz without skin-depth losses, and without the use of expensive super-conductors or liquid-cooled mechanisms. This high frequency magnetic field is successfully used in non-contact-based magnetic heating and desorption of Gasoline and Diesel mixed with sand, water and easily-dispersible, benign micrometer-sized iron filings, used as a magnetic absorber...
October 2017: Heliyon
https://www.readbyqxmd.com/read/29034202/wound-healing-potentials-of-thevetia-peruviana-antioxidants-and-inflammatory-markers-criteria
#14
Nazneen Rahman, Haseebur Rahman, Mir Haris, Riaz Mahmood
Thevetia peruviana is a medicinal plant used in the treatment of external wounds, infected area, ring worms, tumours etc. in traditional system of medicine. The aim of the study was to evaluate the wound healing potentials of T. peruviana leaves hexane (LH) and fruit rind (FW) water extracts and to prove the folkloric claims. The antimicrobial, antioxidant and anti-inflammatory potentials could be important strategies in defining potent wound healing drug. Based on these approaches the current study was designed using incision, excision and dead space wound models with the biochemical, antioxidant enzymes and inflammatory marker analysis...
October 2017: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29034196/protective-effect-of-ethyl-acetate-fraction-of-biophytum-sensitivum-extract-against-sodium-oxalate-induced-urolithiasis-in-rats
#15
Anil T Pawar, Niraj S Vyawahare
The methanolic whole plant extract of Biophytum sensitivum (gǎnyìng cǎo) has been found to possess antiurolithiatic effect. The present study was undertaken to evaluate the antiurolithiatic effect of some fractions of methanolic whole plant extract of B. sensitivum (MBS) in rats as a step toward activity-directed isolation of antiurolithiatic component. The MBS was successively extracted with dichloromethane, ethyl acetate, ethanol and water to obtain fractions. Sodium oxalate (70 mg/kg, i.p.) was administered to rats for seven days to develop calcium oxalate urolithiasis...
October 2017: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29033925/caco-2-invasion-by-cronobacter-sakazakii-and-salmonella-enterica-exposed-to-drying-and-heat-treatments-in-dried-state-in-milk-powder
#16
Emilie Lang, Stéphane Guyot, Pablo Alvarez-Martin, Jean-Marie Perrier-Cornet, Patrick Gervais
Due to the ability of foodborne pathogens to survive in low moisture food, the decontamination of milk powder is an important issue in food protection. The safety of food products is, however, not always insured and the different steps in the processing of food involve physiological and metabolic changes in bacteria. Among these changes, virulence properties may also be affected. In this study, the effect of drying and successive thermal treatments on the invasion capacity of Salmonella Typhimurium, Salmonella Senftenberg, and Cronobacter sakazakii was assessed...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29033499/fabrication-and-characterization-of-electrospun-thermoplastic-polyurethane-fibroin-small-diameter-vascular-grafts-for-vascular-tissue-engineering
#17
E Yu, J Zhang, J A Thomson, L-S Turng
The demand for small-diameter blood vessel substitutes has been increasing due to a shortage of autograft vessels and problems with thrombosis and intimal hyperplasia with synthetic grafts. In this study, hybrid small-diameter vascular grafts made of thermoplastic polyurethane (TPU) and silk fibroin, which possessed a hybrid fibrous structure of an aligned inner layer and a random outer layer, were fabricated by the electrospinning technique using a customized striated collector that generated both aligned and random fibers simultaneously...
November 2016: Int Polym Process
https://www.readbyqxmd.com/read/29033473/impact-of-atra-on-ovalbumin-and-mold-sensitized-f344-rats-and-reversal-of-health-related-implications-by-citral
#18
Ibrahim O Farah, Carlene Holt-Gray, Joseph A Cameron, Michelle Tucci, Hamed Benghuzzi
The role of retinoic acid (All Trans Retinoic Acid; ATRA) in the development of hypervitaminosis A pathophysiology is not well understood or established in the literature. As well, the role of Citral (inhibitor of retinoid function; a non-toxic chemical that exists in two forms (diethyl; C1 or cis-trans dimethyl; C2).) in the reversal of pathophysiological implications is also not ascertained under an in vivo setting. Therefore, it is hypothesized that ovalbumin exposure will sensitize the body to supra-physiologic levels of retinoic acid leading to a negative pathophysiological impact and that Citrals 1 and 2 will reverse or ameliorate the related damage to the body's pathophysiology...
March 2017: Biomedical Sciences Instrumentation
https://www.readbyqxmd.com/read/29033472/histopathological-analysis-of-the-f344-rat-lung-upon-exposure-to-retenoic-acid-ovalbumin-mold-spores-and-citral
#19
Ibrahim O Farah, Carlene Holt-Gray, Joseph A Cameron, Michelle Tucci, Hamed Benghuzzi
The paradoxical role of retinoic acid (All Trans Retinoic Acid; ATRA) in the development of allergic and/or inflammatory complications in contrast to a therapeutic modality for lung pathology is not well understood or established in the literature. As well, the role of Citral (inhibitor of retinoid function; a non-toxic chemical that exists in two forms (diethyl; C1 or cis-trans dimethyl; C2), in the reversal of retinoic acid, ovalbumin and allergic mold spore pathophysiology is also not well ascertained under an in vivo setting...
March 2017: Biomedical Sciences Instrumentation
https://www.readbyqxmd.com/read/29033338/antibiotic-resistance-genes-in-waste-water
#20
REVIEW
Antti Karkman, Thi Thuy Do, Fiona Walsh, Marko P J Virta
Waste water and waste water treatment plants can act as reservoirs and environmental suppliers of antibiotic resistance. They have also been proposed to be hotspots for horizontal gene transfer, enabling the spread of antibiotic resistance genes between different bacterial species. Waste water contains antibiotics, disinfectants, and metals which can form a selection pressure for antibiotic resistance, even in low concentrations. Our knowledge of antibiotic resistance in waste water has increased tremendously in the past few years with advances in the molecular methods available...
October 12, 2017: Trends in Microbiology
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