Read by QxMD icon Read

Water life

Eric Bricker, Ainsley Calladine, Robert Virnstein, Michelle Waycott
Many ecosystems are experiencing rapid transformations due to global environmental change. Understanding how ecological shifts affect species persistence is critical to modern management strategies. The edge of a species range is often where physiological tolerances are in conflict with ability to persist. Extreme examples of clonality over large spatial and temporal scales can occur where the life history of a species allows for it. We examine extreme clonality in an aquatic plant species at the edge if its range...
2018: Frontiers in Plant Science
Zhao Li, Shuang Zhao, Hai-Lin Zhang, Peng Liu, Fei-Fei Liu, Yue-Xian Guo, Xiu-Li Wang
The chemotherapeutic agent paclitaxel is widely used for cancer treatment. Paclitaxel treatment impairs learning and memory function, a side effect that reduces the quality of life of cancer survivors. However, the neural mechanisms underlying paclitaxel-induced impairment of learning and memory remain unclear. Paclitaxel treatment leads to proinflammatory factor release and neuronal apoptosis. Thus, we hypothesized that paclitaxel impairs learning and memory function through proinflammatory factor-induced neuronal apoptosis...
2018: Mediators of Inflammation
Rakesh Kumar, Vajir Tamboli, Rameshwar Sharma, Yellamaraju Sreelakshmi
Several Penjar accessions of tomato grown in the Mediterranean exhibit prolonged shelf life and harbor alcobaca mutation. To uncover the metabolic basis underlying shelf life, we compared four Penjar accessions to Ailsa Craig. Three accessions bore alcobaca mutation, whereas the fourth was a novel NAC-NOR allele. Cuticle composition of Penjars varied widely during fruit ripening. All Penjars exhibited delayed ripening, prolonged on-vine and off-vine shelf life, low ethylene emission, and carotenoid levels. Metabolic profiling revealed shifts in Krebs cycle intermediates, amino acids, and γ-aminobutyric acid levels indicating the attenuation of respiration in Penjars during post-harvest storage...
September 1, 2018: Food Chemistry
Isabel Boavida, Joaquim B Jesus, Vítor Pereira, Cátia Santos, Marisa Lopes, Rui M V Cortes
The Baixo Sabor hydroelectric scheme was recently constructed (began operating in 2015), blocking fish migration immediately at the river mouth. As a compensation measure for spawning habitat loss the Vilariça River which confluences with Sabor River, immediately downstream from the Baixo Sabor scheme, was chosen for rehabilitation site as an attempt to replace the spawning grounds lost in Sabor River for the potamodromous cyprinid Iberian barbel (Luciobarbus bocagei). Restoration activities included: placement of submerged weirs with fish ramps to increase the lotic/lentic sequence, bank reinforcement, boulder placement and river water profile increase...
April 18, 2018: Science of the Total Environment
Pauline Nikola Fleischmann, Wolfgang Rössler, Rüdiger Wehner
Within the powerful navigational toolkit implemented in desert ants, path integration and landmark guidance are the key routines. Here, we use cue-conflict experiments to investigate the interplay between these two routines in ants, Cataglyphis noda, which start their foraging careers (novices) with learning walks and are then tested at different stages of experience. During their learning walks, the novices take nest-centered views from various directions around the nest. In the present experiments, these learning walks are spatially restricted by arranging differently sized water moats around the nest entrance and thus, limiting the space available around the nest and the nest-feeder route...
April 20, 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
Bárbara Werle Nunes, Keila Fernanda Hedlund, Maria Angelica Oliveira, Elvis Carissimi
  Aquatic ecosystems are very prone to contamination. The fast and accurate assessment of the toxicity of water is an important tool for environmental safety. The aim of this study was to assess the possible toxic effects of acrylamide on physiological parameters of the Chlorophyceae Desmodesmus quadricauda. Cells in exponential growth phase were exposed for 72 h to different concentrations of acrylamide. Light microscopy analysis documented cell density, number of cells per coenobia, cell dimensions, and biovolume; chlorophyll a concentration was also determined...
May 1, 2018: Water Environment Research: a Research Publication of the Water Environment Federation
Sarah L Walton, Reetu R Singh, Melissa H Little, Josephine Bowles, Joan Li, Karen M Moritz
KEY POINTS SUMMARY: In this study we investigated whether hypoxia during late pregnancy impairs kidney development in mouse offspring, and also whether this has long-lasting consequences affecting kidney function in adulthood. Hypoxia disrupted growth of the kidney, particularly the collecting duct network, in juvenile male offspring. By mid-late adulthood, these mice developed early signs of kidney disease, notably a compromised response to water deprivation. Female offspring showed no obvious signs of impaired kidney development and did not develop kidney disease, suggesting a underlying protection mechanism from the hypoxia insult...
April 20, 2018: Journal of Physiology
Jinfeng Liu, Xiao He, John Z H Zhang, Lian-Wen Qi
An accurate and efficient ab initio molecular dynamics (AIMD) simulation of liquid water was made possible using the fragment-based approach (J. F. Liu, X. He and J. Z. H. Zhang, Phys. Chem. Chem. Phys. , 2017, 19 , 11931-11936). In this study, we advance the AIMD simulations using the fragment-based coupled cluster (CC) theory, more accurately revealing the structural and dynamical properties of liquid water under ambient conditions. The results show that the double-donor hydrogen-bond configurations in liquid water are nearly in balance with the single-donor configurations, with a slight bias towards the former...
February 28, 2018: Chemical Science
Focco van den Akker, Robert A Bonomo
As a bacterial resistance strategy, serine β-lactamases have evolved from cell wall synthesizing enzymes known as penicillin-binding proteins (PBP), by not only covalently binding β-lactam antibiotics but, also acquiring mechanisms of deacylating these antibiotics. This critical deacylation step leads to release of hydrolyzed and inactivated β-lactams, thereby providing resistance for the bacteria against these antibiotics targeting the cell wall. To combat β-lactamase-mediated antibiotic resistance, numerous β-lactamase inhibitors were developed that utilize various strategies to inactivate the β-lactamase...
2018: Frontiers in Microbiology
Kevin W Conway, Andrew L Stewart, Adam P Summers
A new species of clingfish, Dellichthys trnskii sp. n. is described on the basis of 27 specimens, 11.9-46.0 mm SL, collected from intertidal and shallow coastal waters of New Zealand. It is distinguished from its only congener, D. morelandi Briggs, 1955 by characters of the cephalic sensory system and oral jaws, snout shape, and colouration in life. A rediagnosis is provided for D. morelandi , which is shown to exhibit sexual dimorphism in snout shape.
2018: ZooKeys
Jelena Milic, Marija Glisic, Trudy Voortman, Laura Pletsch Borba, Eralda Asllanaj, Lyda Z Rojas, Jenna Troup, Jessica C Kiefte-de Jong, Ed van Beeck, Taulant Muka, Oscar H Franco
Alcohol intake affects the female body differently than it affects the male body. This is caused by females' lower levels of dehydrogenase enzymes, the enzyme that breaks down alcohol, coupled with the higher fat/water ratio of the female body. Both these factors cause alcohol levels to rise more quickly after ingestion in women than in men. This makes females more vulnerable to alcohol's harmful effects, and consequently women tend to develop alcohol-related diseases earlier in life than do men. As women age and go through menopause, they experience changes in body composition and life changes like retirement or loss of a loved one...
May 2018: Maturitas
Lingjun Kong, Chen-Chao Xie, Haichen Gu, Chao-Peng Wang, Xianlong Zhou, Jian Liu, Zhen Zhou, Zhao-Yang Li, Jian Zhu, Xian-He Bu
Hierarchical porous structures are highly desired for various applications. However, it is still challenging to obtain such materials with tunable architectures. Here, this paper reports hierarchical nanomaterials with oriented 2D pores by taking advantages of thermally instable bonds in vanadium-based metal-organic frameworks (MOFs). High-temperature calcination of these MOFs accompanied by the loss of coordinated water molecules and other components enables the formation of orderly slit-like 2D pores in vanadium oxide/porous carbon nanorods (VOx /PCs)...
April 19, 2018: Small
Strahan Tucker, Shaorong Li, Karia H Kaukinen, David A Patterson, Kristina M Miller
Disease-causing infectious agents are natural components of ecosystems and considered a major selective force driving the evolution of host species. However, knowledge of the presence and abundance of suites of infectious agents in wild populations has been constrained by our ability to easily screen for them. Using salmon as a model, we contrasted seasonal pathogenic infectious agents in life history variants of juvenile Chinook salmon from the Fraser River system (N = 655), British Columbia (BC), through the application of a novel high-throughput quantitative PCR monitoring platform...
2018: PloS One
Jibin An, Chunqiu Xia, Jiahong He, Huixia Feng
Propyl paraben (propyl 4-hydroxybenzoate, PPB), one of the typically used paraben species in various pharmaceutical and personal care products, has been found in different aquatic environment, which could affect the water quality and human health. In this paper, the degradation of PPB by aqueous ferrate (Fe(VI)) was investigated in different water matrix and reaction kinetics as a function of pH was determined. Intermediate products of the degradation process were isolated and characterized by the high performance liquid chromatography/mass spectrometry/mass spectrometry techniques...
April 19, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
Longteng Tang, Yanli Wang, Liangdong Zhu, Che Lee, Chong Fang
Exposure to ultraviolet (UV) light could cause photodamage to biomolecular systems and degrade optoelectronic devices. To mitigate such detrimental effects from the bottom up, we strategically select a photosensitive molecule pyranine and implement femtosecond electronic and Raman spectroscopies to elucidate its ultrafast photoprotection mechanisms in solution. Our results show that pyranine undergoes excited state proton transfer (ESPT) in water while this process is blocked in methanol regardless of excitation wavelengths (267, 400 nm)...
April 19, 2018: Journal of Physical Chemistry Letters
Sharan K Bagal, Kiyoyuki Omoto, David C Blakemore, Peter J Bungay, James G Bilsland, Philip J Clarke, Matthew S Corbett, Ciarán N Cronin, Jingrong Jean Cui, Rebecca Dias, Neil J Flanagan, Samantha E Greasley, Rachel Grimley, Eric Johnson, David Fengas, Linda Kitching, Michelle L Kraus, Indrawan McAlpine, Asako Nagata, Gareth J Waldron, Joseph S Warmus
Tropomyosin receptor kinases are a family of three tyrosine kinases (TrkA, TrkB, TrkC) activated by peptide hormones of the neurotrophin family: nerve growth factor (NGF), brain derived neurotrophic factor (BDNF), neurotrophin 3 (NT3) and neurotrophin 4 (NT4). The NGF antibody tanezumab has provided clinical proof of concept for inhibition of the TrkA kinase pathway in pain. In turn, this has led to significant interest in the development of small molecule inhibitors of TrkA as an alternative intervention point on the NGF pathway...
April 19, 2018: Journal of Medicinal Chemistry
Marco Campus, Nurcan Değirmencioğlu, Roberta Comunian
Table olives are the most widely consumed fermented food in the Mediterranean countries. Peculiar processing technologies are used to process olives, which are aimed at the debittering of the fruits and improvement of their sensory characteristics, ensuring safety of consumption at the same time. Processors demand for novel techniques to improve industrial performances, while consumers' attention for natural and healthy foods has increased in recent years. From field to table, new techniques have been developed to decrease microbial load of potential spoilage microorganisms, improve fermentation kinetics and ensure safety of consumption of the packed products...
2018: Frontiers in Microbiology
Chun-Woong Park, Hyo-Jung Lee, Dong-Won Oh, Ji-Hyun Kang, Chang-Soo Han, Dong-Wook Kim
Background: Norquetiapine ( N -desalkyl quetiapine, NQ) is an active metabolite of quetiapine with stable pharmacokinetic and pharmacological properties. However, its short half-life is a drawback for clinical applications, and long-acting formulations are required. Purpose: The objectives of this study were to prepare improved entrapment efficiency NQ freebase microspheres by the solvent evaporation method with poly(d,l-lactic-co-glycolic acid) (PLGA) as a release modulator and to evaluate their physicochemical and in vitro/in vivo release properties...
2018: Drug Design, Development and Therapy
Daniel J Ayala, Peter Munk, Regitze B C Lundgreen, Sachia J Traving, Cornelia Jaspers, Tue S Jørgensen, Lars H Hansen, Lasse Riemann
Limited insight into eel larvae feeding and diet prevents a holistic overview of the life-cycle of catadromous eels and an understanding of the ecological position of their early stages in marine waters. The present study evaluated the diet of larval European eel, Anguilla anguilla - a critically endangered species. Next-generation 18S rRNA gene sequencing data of Sargasso Sea eel larvae gut contents and marine snow aggregates was compared with a reference plankton database to assess the trophic relations of eel larvae...
April 18, 2018: Scientific Reports
Gamola Z Fortenberry, Patricia Reynolds, Sherry L Burrer, Vicki Johnson-Lawrence, Alice Wang, Amy Schnall, Price Pullins, Stephanie Kieszak, Tesfaye Bayleyegn, Amy Wolkin
OBJECTIVES: The Flint Community Resilience Group (Flint, Michigan USA) and the Centers for Disease Control and Prevention (CDC; Atlanta, Georgia USA) assessed behavioral health concerns among community members to determine the impact of lead contamination of the Flint, Michigan water supply. METHODS: A Community Assessment for Public Health Emergency Response (CASPER) was conducted from May 17 through May 19, 2016 using a multi-stage cluster sampling design to select households and individuals to interview...
April 19, 2018: Prehospital and Disaster Medicine
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"