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https://www.readbyqxmd.com/read/29668051/evidence-for-a-specific-and-critical-role-of-mitogen-activated-protein-kinase-20-in-uni-to-binucleate-transition-of-microgametogenesis-in-tomato
#1
Lifei Chen, Dandan Yang, Youwei Zhang, Limin Wu, Yaoyao Zhang, Lei Ye, Changtian Pan, Yanjun He, Li Huang, Yong-Ling Ruan, Gang Lu
Mitogen-activated protein kinases (MAPKs) regulate diverse aspects of plant growth. However, their potential role in reproductive development remains elusive. Here, we discovered an unique role of SlMPK20, a plant-specific group D MAPK, in pollen development in tomato. RNAi-mediated suppression of SlMPK20 or its knockout using CRISPR/Cas9 significantly reduced or completely abolished pollen viability, respectively, with no effects on maternal fertility. Cell biology and gene expression analyses established that SlMPK20 exerts its role specifically at the uni-to-binucleate transition during microgametogenesis...
April 18, 2018: New Phytologist
https://www.readbyqxmd.com/read/29668016/genetic-and-ecological-niche-modeling-of-calydorea-crocoides-iridaceae-an-endemic-species-of-subtropical-highland-grasslands
#2
Juliana Lustosa Matos de Alencar, Eliane Kaltchuk-Santos, Juliana Fachinetto, Luana Olinda Tacuatiá, Eliana Regina Forni-Martins, Eudes Maria Stiehl-Alves, Tatiana Teixeira de Souza-Chies
Evolutionary analyses have been widely used for evaluation of genetic diversity of natural populations and correlate these data to the fitness of the species, especially in the case of threatened species. Calydorea crocoides occurs in a restricted area at altitudes from 800 to 1500 m in southern Brazil and is considered endangered. A study assessing genetic diversity, cytogenetic features and ecological niche was performed aiming to characterize C. crocoides by multidisciplinary approaches. Molecular data highlighted that most of the total variation (76%; p < 0...
2018: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/29667866/assessment-and-comparison-of-phcs-removal-from-three-types-of-soils-sand-silt-loam-and-clay-using-supercritical-fluid-extraction
#3
Mahmoud Meskar, Majid Sartaj, Julio Angel Infante Sedano
Supercritical fluid extraction (SFE) was applied to investigate the removal of petroleum hydrocarbons (PHCs) from contaminated soils. Per an initial set of tests for different extraction modes and time durations, the combination of 10 min static mode followed by 10 min dynamic mode, repeated for 3 cycles for a total time of 60 min resulted in the highest PHCs removal percentages. SFE experiments were performed at 33 MPa pressure and 75 °C temperature to investigate the influence of soil texture and grain size...
April 18, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29667835/oxygen-release-induced-chemomechanical-breakdown-of-layered-cathode-materials
#4
Linqin Mu, Ruoqian Lin, Rong Xu, Lili Han, Sihao Xia, Dimosthenis Sokaras, James Steiner, Tsu-Chien Weng, Dennis Nordlund, Marca M Doeff, Yijin Liu, Kejie Zhao, Huolin L Xin, Feng Lin
Chemical and mechanical properties interplay on the nanometric scale and collectively govern the functionalities of battery materials. Understanding the relationship between the two can inform the design of battery materials with optimal chemomechanical properties for long-life lithium batteries. Herein, we report a mechanism of nanoscale mechanical breakdown in layered oxide cathode materials, originating from oxygen release at high states of charge under thermal abuse conditions. We observe that the mechanical breakdown of charged Li1-xNi0...
April 18, 2018: Nano Letters
https://www.readbyqxmd.com/read/29667677/theoretical-determination-of-adsorption-and-ionisation-energies-of-polycyclic-aromatic-hydrocarbons-on-water-ice
#5
Eric Michoulier, Nadia Ben Amor, Mathias Rapacioli, Jennifer A Noble, Joëlle Mascetti, Céline Toubin, Aude Simon
In dense interstellar environments, Polycyclic Aromatic Hydrocarbons (PAHs) are likely to condense onto or integrate into water ice mantles covering dust grains. Understanding the role of ice in the photo-induced processes involving adsorbed PAHs is therefore a key issue in astrochemistry. This requires (i) the knowledge of PAH-ice interactions, i.e. PAH-ice adsorption energies and local structures at the PAH-ice interface, as well as (ii) the understanding of the fate of electrons in the PAH-ice system upon excitation...
April 18, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29667287/high-quality-cs2agbibr6-double-perovskite-film-for-lead-free-inverted-planar-heterojunction-solar-cells-with-2-2-efficiency
#6
Weiyin Gao, Chenxin Ran, Jun Xi, Bo Jiao, Wenwen Zhang, Mincai Wu, Xun Hou, Zhaoxin Wu
All inorganic double metal perovskite materials have recently drawn much attention due to their three dimensionality (3D) and non-toxic nature to replace lead based perovskite material. Among all those double perovskite materials, theoretical works have demonstrated that Cs2AgBiBr6 shows high stability and possesses suitable bandgap for solar cell application. However, the film-forming ability of Cs2AgBiBr6 is found to be the utmost challenge hindering its development in thin film solar cell device. In this work, high quality Cs2AgBiBr6 film with ultra-smooth morphology, micro-sized grains, and high crystallinity is realized via anti-solvent dropping technology and post-annealing process under high temperature...
April 17, 2018: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/29667053/effect-of-different-bulking-agents-on-water-variation-and-thermal-balance-and-their-respective-contribution-to-bio-generated-heat-during-long-term-storage-sludge-biodrying-process
#7
Tiantian Liu, Chongwei Cui, Junguo He, Jian Tang
Biodrying was first used for the post-treatment of long-term storage sludge with vinasse as bulking agents. The effect of different bulking agents on water and heat variation and their respective contributions to bio-generated heat during storage sludge biodrying were investigated. Three different bulking agents (beer lees and distillers grains, with conventional straw used for comparison) were mixed with storage sludge for biodrying for an 18-day period. The results revealed the treatment with beer lees as bulking agent achieved the best performance with the highest water removal capacity (658 g kg-1 initial water)...
April 17, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29666936/assessment-of-toxic-impact-of-metals-on-proline-antioxidant-enzymes-and-biological-characteristics-of-pseudomonas-aeruginosa-inoculated-cicer-arietinum-grown-in-chromium-and-nickel-stressed-sandy-clay-loam-soils
#8
Saima Saif, Mohammad Saghir Khan
Considering the heavy metal risk to soil microbiota and agro-ecosystems, the study was designed to determine metal toxicity to bacteria and to find metal tolerant bacteria carrying multifarious plant growth promoting activities and to assess their impact on chickpea cultivated in stressed soils. Metal tolerant strain SFP1 recognized as Pseudomonas aeruginosa employing 16S rRNA gene sequence determination showed maximum tolerance to Cr (400 μg/ml) and Ni (800 μg/ml) and produced variable amounts of indole acetic acid, HCN, NH3 , and ACC deaminase and could solubilize insoluble phosphates even under Cr (VI) and Ni stress...
April 17, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29666763/the-distribution-of-organic-carbon-fractions-in-a-typical-loess-paleosol-profile-and-its-paleoenvironmental-significance
#9
Qingqing Zhang, Jinghua Huang, Feinan Hu, Na Huo, Yingni Shang, Wenqian Chang, Shiwei Zhao
Background: The loess-paleosol sequence on the Loess Plateau has been considered an important paleoclimatic archive to study global climatic and environmental changes in the Quaternary. So far, little attention has been paid to the characteristics of soil organic carbon fractions in loess-paleosol sequences, which may provide valuable information for exploring the evolution of climate and environment in the Quaternary on the Loess Plateau. Methods: In order to explore the significance of mineral-associated organic carbon to total organic carbon (MOC/TOC) ratios in the loess-paleosol sequence for reconstructing paleoenvironmental and paleoclimatic evolution in the Quaternary on the Loess Plateau, we selected a typical loess-paleosol profile in Chunhua county, Xianyang city, Shaanxi province, as the research object...
2018: PeerJ
https://www.readbyqxmd.com/read/29666628/you-shall-not-pass-root-vacuoles-as-a-symplastic-checkpoint-for-metal-translocation-to-shoots-and-possible-application-to-grain-nutritional-quality
#10
REVIEW
Felipe K Ricachenevsky, Artur T de Araújo Junior, Janette P Fett, Raul A Sperotto
Plant nutrient uptake is performed mostly by roots, which have to acquire nutrients while avoiding excessive amounts of essential and toxic elements. Apoplastic barriers such as the casparian strip and suberin deposition block free diffusion from the rhizosphere into the xylem, making selective plasma membrane transporters able to control elemental influx into the root symplast, efflux into the xylem and therefore shoot translocation. Additionally, transporters localized to the tonoplast of root cells have been demonstrated to regulate the shoot ionome, and may be important for seed elemental translocation...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29666347/marker-assisted-introgression-of-opaque2-allele-for-rapid-conversion-of-elite-hybrids-into-quality-protein-maize
#11
Firoz Hossain, Vignesh Muthusamy, Neha Pandey, Ashish K Vishwakarma, Aanchal Baveja, Rajkumar U Zunjare, Nepolean Thirunavukkarasu, Supradip Saha, Kanchikeri M Manjaiah Manjaiah, Boddupalli M Prasanna, Hari S Gupta
Maize is a valuable source of food and feed worldwide. Maize endosperm protein is, however nutritionally poor due to the reduced levels of two essential amino acids, lysine and tryptophan. In this study, recessive opaque2 (o2) allele that confers enhanced endosperm lysine and tryptophan, was introgressed using marker-assisted backcross breeding into three normal inbred lines (HKI323, HKI1105 and HKI1128). These are the parental lines of three popular medium-maturing single cross hybrids (HM4, HM8 and HM9) in India...
March 2018: Journal of Genetics
https://www.readbyqxmd.com/read/29666141/examining-the-effectiveness-of-consuming-flour-made-from-agronomically-biofortified-wheat-zincol-2016-nr-421-for-improving-zn-status-in-women-in-a-low-resource-setting-in-pakistan-study-protocol-for-a-randomised-double-blind-controlled-cross-over-trial-bizifed
#12
Nicola M Lowe, Muhammad Jaffar Khan, Martin R Broadley, Munir H Zia, Harry J McArdle, Edward J M Joy, Heather Ohly, Babar Shahzad, Ubaid Ullah, Gul Kabana, Rashid Medhi, Mukhtiar Zaman Afridi
INTRODUCTION: Dietary zinc (Zn) deficiency is a global problem, particularly in low-income and middle-income countries where access to rich, animal-source foods of Zn is limited due to poverty. In Pakistan, Zn deficiency affects over 40% of the adult female population, resulting in suboptimal immune status and increased likelihood of complications during pregnancy. METHODS AND ANALYSIS: We are conducting a double-blind, randomised controlled feeding study with cross-over design in a low-resource setting in Pakistan...
April 17, 2018: BMJ Open
https://www.readbyqxmd.com/read/29665690/structural-characterization-of-lignin-from-maize-zea-mays-l-fibers-evidences-for-diferuloylputrescine-incorporated-into-the-lignin-polymer-in-maize-kernels
#13
José C Carlos Del Río, Jorge Rencoret, Ana Gutierrez, Hoon Kim, John Ralph
The structure of the phenolic polymer in maize grain fibers, with 5.5% Klason lignin content, has been studied. For this, the milled wood lignin (MWL) and dioxane lignin (DL) preparations were isolated and analyzed. The data indicated that the lignin in maize fibers was syringyl-rich, mostly involved in β-aryl ether, resinol and phenylcoumaran substructures. 2D-NMR and derivatization followed by reductive cleavage (DFRC) also revealed the occurrence of associated ferulates together with trace amounts of p-coumarates acylating the γ-OH of lignin side-chains, predominantly on S-lignin units...
April 18, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29665457/three-dimensional-geometrical-and-topological-characteristics-of-grains-in-conventional-and-grain-boundary-engineered-316l-stainless-steel
#14
Tingguang Liu, Shuang Xia, Bangxin Zhou, Qin Bai, Gregory S Rohrer
The three-dimensional microstructures of a conventional 316L stainless steel and the same material after grain boundary (GB) engineering have been measured by serial sectioning coupled with electron backscatter diffraction mapping. While it is well known that GB engineered materials are differentiated from conventional materials because of the proportion of coincidence site lattice boundaries, the size of their twin-related domains, and their reduced random boundary connectivity, this work provides a quantitative comparison of the geometrical and topological characteristics of grains in 316L stainless steel before and after GB engineering...
April 10, 2018: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/29665119/blade-cast-nonfullerene-organic-solar-cells-in-air-with-excellent-morphology-efficiency-and-stability
#15
Lin Zhang, Baojun Lin, Bo Hu, Xianbin Xu, Wei Ma
Blade-coating serving as a prototype tool for slot-die coating can be very compatible with large-area roll-to-roll coating. Using blade-coating in an ambient environment, an average power conversion efficiency (PCE) of 10.03% is achieved in nonfullerene organic solar cells, which is higher than that of the optimal spin-coated device with a PCE of 9.41%. It is demonstrated that blade-coating can induce a higher degree of molecular packing for both conjugated polymer donors and small-molecular acceptors as it helps to produce a seeding film containing numerous crystal grains, subsequently providing nucleation sites for the residual solution when the motion of the blade exposes a liquid front...
April 17, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29664941/correction-inclusion-of-live-yeast-and-mannan-oligosaccharides-in-high-grain-based-diets-for-sheep-ruminal-parameters-inflammatory-response-and-rumen-morphology
#16
Tatiana Garcia Diaz, Antonio Ferriani Branco, Fernando Alberto Jacovaci, Clóves Cabreira Jobim, Dheyme Cristina Bolson, João Luiz Pratti Daniel
[This corrects the article DOI: 10.1371/journal.pone.0193313.].
2018: PloS One
https://www.readbyqxmd.com/read/29664641/simulations-study-of-single-component-and-mixed-n-alkyl-peg-micelles
#17
Maisa Vuorte, Jukka Määttä, Maria Sammalkorpi
Here, we study one component and mixed n-alkyl-poly(ethylene oxide) (Cm En ) micelles with varying poly(ethylene oxide) (PEG) chain lengths n using coarse-grained molecular simulations. These non-ionic alkyl-PEG surfactants and their aggregates are widely used in bio and chemical technology. As expected, the simulations show that increasing the PEG chain length decreases the alkyl-PEG micelle core diameter and aggregation number but also enhances PEG chain penetration to the core region and spreads the micelle corona...
April 17, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29664608/cyclopentadithiophene-benzothiadiazole-donor-acceptor-polymers-as-prototypical-semiconductors-for-high-performance-field-effect-transistors
#18
Mengmeng Li, Cunbin An, Wojciech Pisula, Klaus Müllen
Donor-acceptor (D-A) conjugated polymers are of great interest as organic semiconductors, because they offer a rational tailoring of the electronic properties by modification of the donor and acceptor units. Nowadays, D-A polymers exhibit field-effect mobilities on the order of 10-2 -100 cm2 V-1 s-1 , while several examples showed a mobility over 10 cm2 V-1 s-1 . The development of cyclopentadithiophene-benzothiadiazole (CDT-BTZ) copolymers one decade ago represents an important step toward high-performance organic semiconductors for field-effect transistors...
April 17, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29663361/quercetin-a-functional-dietary-flavonoid-with-potential-chemo-preventive-properties-in-colorectal-cancer
#19
REVIEW
Saber G Darband, Mojtaba Kaviani, Bahman Yousefi, Shirin Sadighparvar, Firouz G Pakdel, Javad A Attari, Iraj Mohebbi, Somayeh Naderi, Maryam Majidinia
Recently, an intense attention has been paid to the application of natural compounds as a novel therapeutic strategy for cancer treatment. Quercetin, a natural flavonol present in many commonly consumed food items, is widely demonstrated to exert inhibitory effects on cancer progression through various mechanisms. Since there is a strong association with diets containing abundant vegetables, fruits, and grains, and significant decline in the risk of colon cancer, accumulation studies have focused on the anticancer potential of quercetin in colorectal cancer...
April 16, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29663161/granulometric-and-pebble-morphometric-applications-to-benin-flank-sediments-in-western-anambra-basin-nigeria-proxies-for-paleoenvironmental-reconstruction
#20
Azuka Ocheli, Anthony Uwaoma Okoro, Ovie Benjamin Ogbe, Godwin Okumagbe Aigbadon
Integrated granulometric and pebble morphometric study of Late Cretaceous rocks of the Benin Flank, Nigeria, were used to delineate depositional process and environment of the rocks in the study area. Granulometric analysis reveals that the sandstones of the Lokoja Bassange Formation have an average graphic mean (Mz) of 0.59Φ (coarse grains), inclusive graphic standard deviation (δi) of 1.36Φ (poorly sorted), graphic kurtosis (Ka) of 1.12Φ (leptokurtic), and inclusive graphic skewness (Ski) of - 0.14Φ (stongly coarse skewed)...
April 17, 2018: Environmental Monitoring and Assessment
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