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https://www.readbyqxmd.com/read/28822339/effects-of-simulated-n-deposition-on-foliar-nutrient-status-n-metabolism-and-photosynthetic-capacity-of-three-dominant-understory-plant-species-in-a-mature-tropical-forest
#1
Qinggong Mao, Xiankai Lu, Hui Mo, Per Gundersen, Jiangming Mo
Anthropogenic increase of nitrogen (N) deposition has threatened forest ecosystem health at both regional and global scales. In N-limited ecosystems, atmospheric N input is regarded as an important nutrient source for plant growth. However, it remains an open question on how elevated N deposition affects plant growth in N-rich forest ecosystems. To address this question, we used a simulated N deposition experiment in an N-rich mature tropical forest of southern China, with N addition levels as 0kgNha(-1)yr(-1) (Control), 50kgNha(-1)yr(-1) (Low-N), 100kgNha(-1)yr(-1) (Middle-N) and 150kgNha(-1)yr(-1) (High-N), respectively...
August 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28822337/photocatalysis-of-estrone-in-water-and-wastewater-comparison-between-au-tio2-nanocomposite-and-tio2-and-degradation-by-products
#2
Kireesan Sornalingam, Andrew McDonagh, John L Zhou, Md Abu Hasan Johir, Mohammad Boshir Ahmed
Gold-modified TiO2 (Au-TiO2) photocatalysts were utilised for the degradation of estrone (E1), a major endocrine disrupting chemical in water and wastewater. Au-TiO2 catalysts were synthesised by a deposition-precipitation method with gold loadings of 0-8% (wt%). The Au-TiO2 nanocomposite exhibited superior activity compared to P25 TiO2 under UVA (λ=365nm), cool white (λ>420nm) and green (λ=523nm) light emitting diodes (LEDs), for treating 1mgl(-1) of E1. The 4wt% Au loading was found to produce the best photocatalytic activity with a rate constant of 2...
August 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28822328/the-effects-of-haptic-input-on-biomechanical-and-neurophysiological-parameters-of-walking-a-scoping-review
#3
REVIEW
Alison R Oates, Laura Hauck, Renato Moraes, Kathryn M Sibley
Walking is an important component of daily life requiring sensorimotor integration to be successful. Adding haptic input via light touch or anchors has been shown to improve standing balance; however, the effect of adding haptic input on walking is not clear. This scoping review systematically summarizes the current evidence regarding the addition of haptic input on walking in adults. Following an established protocol, relevant studies were identified using indexed data bases (Medline, EMBASE, PsychINFO, Google Scholar) and hand searches of published review articles on related topics...
August 9, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28822291/highly-absorbing-multispectral-near-infrared-polymer-nanoparticles-from-one-conjugated-backbone-for-photoacoustic-imaging-and-photothermal-therapy
#4
Haobin Chen, Jian Zhang, Kaiwen Chang, Xiaoju Men, Xiaofeng Fang, Libo Zhou, Dongliang Li, Duyang Gao, Shengyan Yin, Xuanjun Zhang, Zhen Yuan, Changfeng Wu
Semiconducting polymers with specific absorption are useful in various applications, including organic optoelectronics, optical imaging, and nanomedicine. However, the optical absorption of a semiconducting polymer with a determined structure is hardly tunable when compared with that of inorganic semiconductors. In this work, we show that the optical absorption of polymer nanoparticles from one conjugated backbone can be effectively tuned through judicious design of the particle morphology and the persistence length of polymers...
August 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28822289/assessing-differences-between-ostwald-ripening-and-coalescence-by-rheology-laser-diffraction-and-multiple-light-scattering
#5
J Santos, N Calero, L A Trujillo-Cayado, M C Garcia, J Muñoz
This contribution deals with the study of the influence of surfactant ratio, namely triblock copolymer (Pluronic PE9400) to polyoxyethylene glycerol fatty acid ester (Levenol C201), on the stability of emulsions formulated with a mixture of two biosolvents (N,N Dimethyl Decanamide and D-limonene), which find applications as carriers of agrochemicals. Emulsions containing Pluronic, regardless of the concentration studied, underwent Ostwald ripening while coalescence controlled the destabilization process of emulsions containing Levenol C201 as the only emulsifier...
August 14, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28822288/two-sides-of-the-coin-part-2-colloid-and-surface-science-meets-real-biointerfaces
#6
Barry W Ninham, Kåre Larsson, Pierandrea Lo Nostro
Part 1 revisited developments in lipid and surfactant self assembly over the past 40 years [1]. New concepts emerged. Here we explore how these developments can be used to make sense of and bring order to a range of complex biological phenomena. Together with Part 1, this contribution is a fundamental revision of intuition at the boundaries of Colloid Science and Biological interfaces from a perspective of nearly 50 years. We offer new insights on a unified treatment of self assembly of lipids, surfactants and proteins in the light of developments presented in Part 1...
August 5, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28822287/blue-light-induced-free-radicals-from-riboflavin-in-degradation-of-crystal-violet-by-microbial-viability-evaluation
#7
Ji-Yuan Liang, Jeu-Ming P Yuann, Zong-Jhe Hsie, Shiuh-Tsuen Huang, Chiing-Chang Chen
Crystal violet (CV) is applied in daily use mainly as a commercial dye and antimicrobial agent. Waste water containing CV may affect aquatic ecosystems. Riboflavin, also known as vitamin B2, is non-toxic and an essential vitamin required for the functions of the human body. Riboflavin is photosensitive to UV and visible light in terms of generating reactive oxygen species. This study investigated the potential application of blue light on riboflavin, so as to come up with an effective way of degrading CV during its treatment...
August 12, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28822238/the-environmental-injustice-of-beauty-framing-chemical%C3%A2-exposures-from-beauty-products-as-a-health%C3%A2-disparities-concern
#8
Ami R Zota, Bhavna Shamasunder
The obstetrics-gynecology community has issued a call to action to prevent toxic environmental chemical exposures and their threats to healthy human reproduction. Recent committee opinions recognize that vulnerable and underserved women may be impacted disproportionately by environmental chemical exposures and recommend that reproductive health professionals champion policies that secure environmental justice. Beauty product use is an understudied source of environmental chemical exposures. Beauty products can include reproductive and developmental toxicants such as phthalates and heavy metals; however, disclosure requirements are limited and inconsistent...
August 14, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28822213/liberia-national-disaster-preparedness-coordination-exercise-implementing-lessons-learned-from-the-west-african-disaster-preparedness-initiative
#9
Melinda J Morton Hamer, Paul L Reed, Jane D Greulich, Charles W Beadling
OBJECTIVE: In light of the recent Ebola outbreak, there is a critical need for effective disaster management systems in Liberia and other West African nations. To this end, the West Africa Disaster Preparedness Initiative held a disaster management exercise in conjunction with the Liberian national government on November 24-25, 2015. DESIGN: During this tabletop exercise (TTX), interactions within and between the 15 counties and the Liberian national government were conducted and observed to refine and validate the county and national standard operating procedures (SOPs)...
January 2017: American Journal of Disaster Medicine
https://www.readbyqxmd.com/read/28822173/-breakthrough-in-key-science-and-technologies-in-dendrobium-catenatum-industry
#10
Ji-Ping Si, Qi Wang, Zhong-Jian Liu, Jing-Jing Liu, Yi-Bo Luo
In view of the significant difficulties of propagation, planting and simple product in Dendrobium catenatum(D. officinale)industry development, a series of research were carried out. Genome study showed that D. catenatum is a specie of diploid with 38 chromosomes and 28 910 protein-coding genes. It was identified that specific genes accumulated in different organs at the transcriptome level. We got an insight into the gene regulation mechanism of the loss of the endospermous seed, the wide ecological adaptability and the synthesis of polysaccharides, which provided a theoretical basis for genetic engineering breeding and development and utilization of active pharmaceutical ingredients...
June 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28822157/-the-analysis-of-multivariate-image-and-chemometrics-in-tlc-fingerprinting-of-artificial-cow-bezoar
#11
Ling-Wen Yao, Yan Shi, Dong-Mei Sun, Xian-Long Cheng, Feng Wei, Shuang-Cheng Ma
A method of thin-layer fingerprinting chromatogram of artificial cow-bezoar was established with the developing solvent consisting of cyclohexane, ethyl acetate, acetic acid and methanol (2∶7∶1∶2), and 10% sulfuric acid ethanol solution sprayed as colour-developing agent. After heated at 105 ℃, TLC was recorded as an image in ultraviolet light at 366 nm which was converted into grayscale. By the gray value extracted from the grayscale, the multivariate data obtained from TLC of samples could be analyzed by chemometric method...
June 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28822138/light-microscopy-transmission-electron-microscopy-and-immunohistochemistry-protocols-for-studying-photorespiration
#12
Roxana Khoshravesh, Vanessa Lundsgaard-Nielsen, Stefanie Sultmanis, Tammy L Sage
High-resolution images obtained from plant tissues processed for light microscopy, transmission electron microscopy, and immunohistochemistry have provided crucial links between plant subcellular structure and physiology during photorespiration as well as the impact of photorespiration on plant evolution and development. This chapter presents established protocols to guide researchers in the preparation of plant tissues for high-resolution imaging with a light and transmission electron microscope and detection of proteins using immunohistochemistry...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28822112/effectiveness-of-resistance-circuit-based-training-for-maximum-oxygen-uptake-and-upper-body-one-repetition-maximum-improvements-a-systematic-review-and-meta-analysis
#13
REVIEW
Francisco Antonio Muñoz-Martínez, Jacobo Á Rubio-Arias, Domingo Jesús Ramos-Campo, Pedro E Alcaraz
BACKGROUND: It is well known that concurrent increases in both maximal strength and aerobic capacity are associated with improvements in sports performance as well as overall health. One of the most popular training methods used for achieving these objectives is resistance circuit-based training. OBJECTIVE: The objective of the present systematic review with a meta-analysis was to evaluate published studies that have investigated the effects of resistance circuit-based training on maximum oxygen uptake and one-repetition maximum of the upper-body strength (bench press exercise) in healthy adults...
August 18, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28822035/identification-and-functional-characterization-of-a-p-coumaroyl-coa-2-hydroxylase-involved-in-the-biosynthesis-of-coumarin-skeleton-from-peucedanum-praeruptorum-dunn
#14
Ruolan Yao, Yucheng Zhao, Tingting Liu, Chuanlong Huang, Sheng Xu, Ziwei Sui, Jun Luo, Lingyi Kong
A p-coumaroyl CoA 2'-hydroxylase responsible for the formation of coumarin lactone ring was identified from Peucedanum praeruptorum Dunn and functionally characterized in vitro. Coumarins are important plant secondary metabolites with a variety of biological activities. Ortho-hydroxylation of cinnamates leads to the formation of coumarin lactone ring and is generally thought to be a key step in coumarin biosynthesis. However, ortho-hydroxylases, especially p-coumaroyl CoA 2'-hydroxylase (C2'H) responsible for the biosynthesis of the most common coumarin skeleton, have received insufficient attention...
August 18, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28822009/urolithiasis-as-an-extraarticular-manifestation-of-ankylosing-spondylitis
#15
REVIEW
Cengiz Korkmaz, Döndü Üsküdar Cansu, John A Sayer
Ankylosing spondylitis (AS) affects sacroiliac and axial joints as well as extraarticular organs, such as the eye, lung, bowel, and heart. Although examples of renal involvement in AS, such as IgA nephropathy, amyloidosis, and glomerulonephritis, have been reported, it has not been emphasized that urolithiasis is frequently formed in the clinical course of AS. Growing evidence indicates that urolithiasis may be observed in AS patients and is more frequent than other extraarticular features. In this review, we will discuss frequency and predictors of AS-related urolithiasis and summarize the possible underlying genetic and biochemical mechanisms...
August 18, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28821999/developmental-neurotoxicity-of-the-hippocampus-following-in-utero-exposure-to-methylmercury-impairment-in-cell-signaling
#16
Luana Heimfarth, Jeferson Delgado, Moara Rodrigues Mignori, Daniel Pens Gelain, José Cláudio Fonseca Moreira, Regina Pessoa-Pureur
In this study, we assessed some hippocampal signaling cascades and behavioral impairments in 30-day-old rat pups prenatally exposed to methylmercury (MeHg). Pregnant rats were exposed to 1.0 or 2.0 mg/kg MeHg by gavage in alternated days from gestational day 5 until parturition. We found increased anxiety-like and decreased exploration behavior evaluated by open field test and deficit of both short- and long-term memories by novel object recognition task, respectively, in MeHg-treated pups. Downregulated PI3K/Akt/mTOR pathway and activated/hypophosphorylated (Ser9) GSK3β in MeHg-treated pups could be upstream of hyperphosphorylated Tau (Ser396) destabilizing microtubules and contributing to neural dysfunction in the hippocampus of these rats...
August 18, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28821907/immigration-to-israel-during-childhood-is-associated-with-diabetes-at-adolescence-a-study-of-2-7-million-adolescents
#17
Alon Peled, Barak Gordon, Gilad Twig, Joseph Mendlovic, Estela Derazne, Michal Lisnyansky, Itamar Raz, Arnon Afek
AIMS/HYPOTHESIS: Immigration studies can shed light on diabetes pathogenesis and risk factors. To this end, we investigated the association between age at immigration and diabetes occurrence at adolescence among immigrants to Israel. METHODS: We analysed cross-sectional data on 2,721,767 Jewish adolescents assessed for mandatory military service at approximately 17 years of age between 1967 and 2014. The study population comprised 430,176 immigrants with origins in Ethiopia, former USSR, Middle East and North Africa (ME/NA) and western countries...
August 19, 2017: Diabetologia
https://www.readbyqxmd.com/read/28821876/transcriptomic-biochemical-and-physio-anatomical-investigations-shed-more-light-on-responses-to-drought-stress-in-two-contrasting-sesame-genotypes
#18
Komivi Dossa, Donghua Li, Linhai Wang, Xiaomin Zheng, Aili Liu, Jingyin Yu, Xin Wei, Rong Zhou, Daniel Fonceka, Diaga Diouf, Boshou Liao, Ndiaga Cissé, Xiurong Zhang
Sesame is an important oilseed crop with a high oil quality. It is prone to drought stress in the arid and semi-arid areas where it is widely grown. This study aims to decipher the response of tolerant (DT) and sensitive (DS) genotypes to progressive drought based on transcriptome, biochemical and physio-anatomical characterizations. Results indicated that under severe stress, DT relied on a well-functioning taproot while DS displayed a disintegrated root due to collapsed cortical cells. This was attributed to a higher accumulation of osmoprotectants and strong activity of antioxidant enzymes especially peroxidases in DT...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821854/dynamics-of-hydration-water-plays-a-key-role-in-determining-the-binding-thermodynamics-of-protein-complexes
#19
Song-Ho Chong, Sihyun Ham
Interfacial waters are considered to play a crucial role in protein-protein interactions, but in what sense and why are they important? Here, using molecular dynamics simulations and statistical thermodynamic analyses, we demonstrate distinctive dynamic characteristics of the interfacial water and investigate their implications for the binding thermodynamics. We identify the presence of extraordinarily slow (~1,000 times slower than in bulk water) hydrogen-bond rearrangements in interfacial water. We rationalize the slow rearrangements by introducing the "trapping" free energies, characterizing how strongly individual hydration waters are captured by the biomolecular surface, whose magnitude is then traced back to the number of water-protein hydrogen bonds and the strong electrostatic field produced at the binding interface...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821843/broadband-polarization-conversion-with-anisotropic-plasmonic-metasurfaces
#20
Wei Cao, Xiaodong Yang, Jie Gao
Metasurfaces offer exciting opportunities that enable precise control of light propagation, optical intensity, phase and polarization. Plasmonic metasurface based quarter-wave plates have been recently studied to realize the conversion between linear polarization and circular polarization. However, it is still quite challenging to directly measure the birefringent phase retardation introduced by metasurface wave plates with a reliable technique. Here, we report a high-performance broadband metasurface quarter-wave plate made of anisotropic T-shaped plasmonic antennas in near-infrared wavelength range, where the achromatic nearly 90° transmitted phase retardation through the metasurface is precisely characterized with an optical vortex based interferometric approach...
August 18, 2017: Scientific Reports
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