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https://www.readbyqxmd.com/read/28637252/wheat-seed-weight-and-quality-differ-temporally-in-sensitivity-to-warm-or-cool-conditions-during-seed-development-and-maturation
#1
M Nasehzadeh, R H Ellis
Background and aims: Short periods of extreme temperature may affect wheat ( Triticum aestivum ) seed weight, but also quality. Temporal sensitivity to extreme temperature during seed development and maturation was investigated. Methods: Plants of 'Tybalt' grown at ambient temperature were moved to growth cabinets at 29/20 °C or 34/20 °C (2010), or 15/10 °C or 34/20 °C (2011), for successive 7-d periods from 7 DAA (days after anthesis) onwards, and also 7-65 DAA in 2011...
June 15, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28637093/intra-abdominal-cooling-system-limits-ischemia-reperfusion-injury-during-robot-assisted-renal-transplantation
#2
Raphael P H Meier, Vincent Piller, Monika E Hagen, Charles Joliat, Jean-Bernard Buchs, Antonio Nastasi, Raphael Ruttimann, Nicolas C Buchs, Solange Moll, Jean-Paul Vallée, François Lazeyras, Philippe Morel, Leo Bühler
Robot-assisted kidney transplantation is feasible; however, concerns have been raised about possible increases in warm ischemia times. We describe a novel intra-abdominal cooling system to continuously cool the kidney during the procedure. Porcine kidneys were procured by standard open technique. Groups were as follow: Robotic renal transplantation with (n=11) and without (n=6) continuous intra-abdominal cooling and conventional open technique with intermittent 4°C saline cooling (n=6). Renal cortex temperature, magnetic resonance imaging and histology were analyzed...
June 21, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28636927/noxious-but-not-innocuous-thermal-stimuli-evoke-perk-expression-in-dorsal-horn-neurons-after-spared-nerve-injury-in-adult-rats
#3
Mohamad S Samour, Sumaiya M Shaikh, David A Mahns, Peter J Shortland
Noxious stimulation of sensory afferents evokes phosphorylated extracellular signal regulated kinase (pERK) expression in spinal cord neurons. This study investigated the expression of pERK in the dorsal horn neurons in response to innocuous and noxious cold stimuli in naïve versus spared nerve injury (SNI) rats. Noxious cold or hot stimuli (0 or 45°C) elicited pERK expression in laminae I-II whereas cooling stimuli from 32°C to 25, 15 or 5°C produced no or little pERK expression in dorsal horn neurons...
June 18, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28636921/characterizing-intracellular-ice-formation-of%C3%A2-lymphoblasts-using-low-temperature-raman%C3%A2-spectroscopy
#4
Guanglin Yu, Yan Rou Yap, Kathryn Pollock, Allison Hubel
Raman microspectroscopy was used to quantify freezing response of cells to various cooling rates and solution compositions. The distribution pattern of cytochrome c in individual cells was used as a measure of cell viability in the frozen state and this metric agreed well with the population-averaged viability and trypan blue staining experiments. Raman imaging of cells demonstrated that intracellular ice formation (IIF) was common and did not necessarily result in cell death. The amount of intracellular ice as well as ice crystal size played a role in determining whether or not ice inside the cell was a lethal event...
June 20, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28635620/anomalous-dielectric-response-of-short-hydrogen-bonds-under-pressure-the-case-of-mn-fe-sup-2-sup-alpo-sub-4-sub-oh-sub-2-sub-h-sub-2-sub-o
#5
Benedikt Röska, So-Hyun Park, Yusuke Yoshimori, Kenta Kimura, Tsuyoshi Kimura
An anomalous increase in the real part of dielectric response is observed in Mn<sub>0.5</sub>Fe<sub>0.5</sub>AlPO<sub>4</sub>(OH)<sub>2</sub>H<sub>2</sub>O while cooling to ~70 K. This is addressed to field-induced proton dynamics in a short hydrogen bond of 2.480(3) Å. The absence of discontinuities in heat capacity curves above the Néel temperature (T<sub>N</sub> ≈ 7 K) excludes a paraelectric to antiferroelectric phase transition...
June 21, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28634805/comparative-prevalence-of-escherichia-coli-carrying-virulence-genes-and-class-1-and-2-integrons-in-sub-tropical-and-cool-temperate-freshwater
#6
Jatinder P S Sidhu, Paul Jagals, Amy Smith, Simon Toze
Aquatic environments are now recognized secondary habitat of potentially pathogenic Escherichia coli. In this study, PCR-based analyses were used to determine the phylogenetic composition and frequency of occurrence of eight clinically significant virulence genes (VGs) in E. coli isolates from sub-tropical Brisbane and cool temperate Tasmania freshwater in Australia. In Brisbane, non-commensal E. coli isolates belonging to the B2 and D phylogenetic group were dominant (72%). A significantly higher number (P < 0...
June 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28634501/subarachnoid-hemorrhage-and-long-term-stroke-risk-after-traumatic-brain-injury
#7
Nicholas A Morris, Joséphine Cool, Alexander E Merkler, Hooman Kamel
BACKGROUND: Recent studies suggest that traumatic brain injury (TBI) is a risk factor for subsequent ischemic stroke, even years after the initial insult. The mechanisms of the association remain unclear. The presence of traumatic subarachnoid hemorrhage (tSAH) may mediate the effect of TBI on long-term stroke risk, as it has previously been linked to short-term vasospasm and delayed cerebral ischemia. METHODS: Using administrative claims data, we conducted a retrospective cohort study of acute care hospitalizations...
July 2017: Neurohospitalist
https://www.readbyqxmd.com/read/28634410/climate-response-to-the-8-2-ka-event-in-coastal-california
#8
Jessica L Oster, Warren D Sharp, Aaron K Covey, Jansen Gibson, Bruce Rogers, Hari Mix
A fast-growing stalagmite from the central California coast provides a high-resolution record of climatic changes synchronous with global perturbations resulting from the catastrophic drainage of proglacial Lake Agassiz at ca. 8.2 ka. High frequency, large amplitude variations in carbon isotopes during the 8.2 ka event, coupled with pulsed increases in phosphorus concentrations, indicate more frequent or intense winter storms on the California coast. Decreased magnesium-calcium ratios point toward a sustained increase in effective moisture during the event, however the magnitude of change in Mg/Ca suggests this event was not as pronounced on the western North American coast as anomalies seen in the high northern latitudes and monsoon-influenced areas...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28633133/optically-stimulated-luminescence-study-in-rare-earth-doped-srbpo5
#9
Sonali Gaikwad, R R Patil, M S Kulkarni, S V Moharil
Optically stimulated luminescence (OSL) was studied in rare earth doped SrBPO5 for the possible applications in radiation dosimetry using optically stimulated luminescence. The study shows that the sensitivity of the Eu doped SrBPO5 shows good OSL and the sensitivity is comparable to that of Al2O3:C. It is observed that annealing has a profound effect on the OSL sensitivity. Slowly cooled Eu doped sample shows highest sensitivity and is 77% compared to that Al2O3:C whereas lowest sensitivity is observed in the quenched sample...
June 9, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28630900/reconstructed-storm-tracks-reveal-three-centuries-of-changing-moisture-delivery-to-north-america
#10
Erika K Wise, Matthew P Dannenberg
Moisture delivery to western North America is closely linked to variability in the westerly storm tracks of midlatitude cyclones, which are, in turn, modified by larger-scale features such as the El Niño-Southern Oscillation system. Instrumental and modeling data suggest that extratropical storm tracks may be intensifying and shifting poleward due to anthropogenic climate change, but it is difficult to separate recent trends from natural variability because of the large amount of decadal and longer variation in storm tracks and their limited instrumental record...
June 2017: Science Advances
https://www.readbyqxmd.com/read/28630446/strong-sub-seasonal-wintertime-cooling-over-east-asia-and-northern-europe-associated-with-super-el-ni%C3%A3-o-events
#11
Xin Geng, Wenjun Zhang, Malte F Stuecker, Fei-Fei Jin
East Asia experienced a record-breaking cold event during the 2015/16 boreal winter, with pronounced impacts on livelihood in the region. We find that this large-scale cold spell can be attributed to the concurrent super El Niño event in the tropical Pacific. Our analysis reveals that all super El Niño winters (1982/83, 1997/98, and 2015/16) were accompanied by a rapid sub-seasonal North Atlantic Oscillation (NAO)/Arctic Oscillation (AO) phase reversal from a positive to a negative state during early January, which was largely caused by the interaction of these super El Niño events with the subtropical jet annual cycle...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28630395/cerebral-infarction-by-paradoxical-gas-embolism-during-laparoscopic-liver-resection-with-injury-of-the-hepatic-vessels-in-a-patient-without-a-right-to-left-systemic-shunt
#12
Toshiyasu Kawahara, Masahiro Hagiwara, Hiroyuki Takahashi, Mariko Tanaka, Koji Imai, Jun Sawada, Takayuki Kunisawa, Hiroyuki Furukawa
BACKGROUND Carbon dioxide (CO2) is believed to be the safest gas for laparoscopic surgery, which is a standard procedure. We experienced severe cerebral infarction caused by paradoxical CO2 embolism during laparoscopic liver resection with injury of the hepatic vessels despite the absence of a right-to-left systemic shunt. CASE REPORT A 60-year-old man was diagnosed with hepatocellular carcinoma in the right hepatic lobe secondary to alcoholic liver disease. We planned the laparoscopy-assisted liver resection...
June 20, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28630306/heat-exchange-between-a-bouncing-drop-and-a-superhydrophobic-substrate
#13
Samira Shiri, James C Bird
The ability to enhance or limit heat transfer between a surface and impacting drops is important in applications ranging from industrial spray cooling to the thermal regulation of animals in cold rain. When these surfaces are micro/nanotextured and hydrophobic, or superhydrophobic, an impacting drop can spread and recoil over trapped air pockets so quickly that it can completely bounce off the surface. It is expected that this short contact time limits heat transfer; however, the amount of heat exchanged and precise role of various parameters, such as the drop size, are unknown...
June 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28629045/chitosan-based-in-situ-forming-polyelectrolyte-complexes-a-potential-sustained-drug-delivery-polymeric-carrier-for-high-dose-drugs
#14
Niharika Lal, Juhi Dubey, Praveen Gaur, Navneet Verma, Anurag Verma
The present study investigated the feasibility of using combination of Cationic and anionic polymers as sustained release carrier for the delivery of high dose gastric acid soluble model drug Paracetamol. Various formulations were prepared using wet granulation technique. Briefly a cooled (4°C) neutral solution of chitosan (CH) was combined with cooled aqueous solution (4°C) of anionic polymer such as Gum Ghatti (GG) and Xanthan gum (XG). This polyelectrolyte solution was then used to granulate the model drug Paracetamol...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28628950/flexible-fused-azomethine-boron-complex-thermochromic-luminescence-and-thermosalient-behaviors-in-structural-transitions-between-crystalline-polymorphs
#15
Shunsuke Ohtani, Masayuki Gon, Kazuo Tanaka, Yoshiki Chujo
This manuscript reports the multi-functional boron complex presenting aggregation-induced emission (AIE), crystallization-induced emission enhancement (CIEE) and thermosalient behaviors accompanying thermochromic luminescence during crystal-crystal transitions by employing the fused azomethine ligand. In particular, we propose that these properties can be explained by molecular "flexibility" toward external stimuli including temperature changes and photo-excitation, and two types of crystal polymorphs having different absorption and luminescent properties were obtained...
June 19, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28628907/whispering-gallery-mode-esr-spectroscopy-and-parameters-measurement-in-single-crystal-srlaalo4-at-millikelvin-temperature
#16
M A Hosain, J-M Le Floch, J Krupka, M E Tobar
A cylindrical single crystal SrLaAlO4 Whispering Gallery mode dielectric resonator was cooled to millikelvin temperature using a dilution refrigerator. By controlling a DC-magnetic field, impurity ions' spins were coupled to a variety of modes allowing the measurement of hybrid spin-photon systems. This Electron Spin Resonance mapping technique allowed us to detect Cu(2+),Fe(3+) and Mn(4+) impurity ions (at the level of parts per million (ppm) to parts per billion (ppb)), verified by the measurement of the spin parameters along with their site symmetry...
June 11, 2017: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/28628191/abiotic-and-biotic-factors-modulate-carrion-fate-and-vertebrate-scavenging-communities
#17
Kelsey L Turner, Erin F Abernethy, L Mike Conner, Olin E Rhodes, James C Beasley
Carrion is a valuable nutrient resource used by a diversity of vertebrates across the globe. However, vertebrate scavenging ecology remains an understudied area of science, especially in regards to how biotic and abiotic factors influence scavenging community composition. Here we elucidate how fundamental biotic and abiotic factors interact to modulate the efficiency and composition of vertebrate scavengers by investigating scavenging dynamics across a large gradient in carcass sizes and habitat types representative of many temperate ecosystems, as well as between two seasons reflecting differences in invertebrate activity...
June 19, 2017: Ecology
https://www.readbyqxmd.com/read/28627195/exercise-improved-semen-quality-and-reproductive-hormone-levels-in-sedentary-obese-adults
#18
Miguel Ángel Rosety, Antonio Jesus Díaz, Jesús María Rosety, María Teresa Pery, Francisco Brenes-Martín, Marco Bernardi, Natalia García, Manuel Rosety-Rodríguez, Francisco Javier Ordoñez, Ignacio Rosety
INTRODUCTION: From the previously published literature on the relationship between obesity and infertility, it is clear that male obesity negatively impacts semen quality. Accordingly, this study was conducted to determine whether regular exercise may improve semen quality in sedentary obese adults. MATERIAL AND METHODS: Ninety obese adults were randomly allocated to the intervention (n = 45) or control group (n = 45). Participants in the intervention group performed a 16-week aerobic training program in a treadmill, three sessions per week, consisting of a warm-up (10-15 minutes), 35-50 minutes treadmill exercise (increasing five minutes per four weeks) at a work intensity of 50-65% of peak heart rate (increasing a 5% per four weeks) and cooling-down (5-10 minutes)...
June 5, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/28627025/novel-rankl-de-loop-mutants-antagonize-rank-mediated-osteoclastogenesis
#19
Yizhou Wang, Aart H G van Assen, Carlos R Reis, Rita Setroikromo, Ronald van Merkerk, Ykelien L Boersma, Robbert H Cool, Wim J Quax
Bone is a dynamic tissue that is maintained by continuous renewal. An imbalance in bone resorption and bone formation can lead to a range of disorders, such as osteoporosis. The Receptor Activator of NF-κB (RANK)-RANK ligand (RANKL) pathway plays a major role in bone remodeling. Here, we investigated the effect of mutations at position I248 in the DE-loop of murine RANKL on the interaction of RANKL with RANK, and subsequent activation of osteoclastogenesis. Two single mutants, RANKL I248Y and I248K, were found to maintain binding and have the ability to reduce wild type RANKL-induced osteoclastogenesis...
June 19, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28626344/increased-transendothelial-transport-of-ccl3-is-insufficient-to-drive-immune-cell-transmigration-through-the-blood-brain-barrier-under-inflammatory-conditions-in-vitro
#20
Maxime De Laere, Carmelita Sousa, Megha Meena, Roeland Buckinx, Jean-Pierre Timmermans, Zwi Berneman, Nathalie Cools
Many neuroinflammatory diseases are characterized by massive immune cell infiltration into the central nervous system. Identifying the underlying mechanisms could aid in the development of therapeutic strategies specifically interfering with inflammatory cell trafficking. To achieve this, we implemented and validated a blood-brain barrier (BBB) model to study chemokine secretion, chemokine transport, and leukocyte trafficking in vitro. In a coculture model consisting of a human cerebral microvascular endothelial cell line and human astrocytes, proinflammatory stimulation downregulated the expression of tight junction proteins, while the expression of adhesion molecules and chemokines was upregulated...
2017: Mediators of Inflammation
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