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https://www.readbyqxmd.com/read/29036694/efficient-modulation-of-photosynthetic-apparatus-confers-desiccation-tolerance-in-the-resurrection-plant-boea-hygrometrica
#1
Tinghong Tan, Yanni Sun, Shishuai Luo, Chao Zhang, Huapeng Zhou, Honghui Lin
Boea hygrometrica (B. hygrometrica) can tolerate severe desiccation and resume photosynthetic activity rapidly upon water availability. However, little is known about the mechanisms by which B. hygrometrica adapts to dehydration and resumes competence upon rehydration. Here we determined how B. hygrometrica to deal with oxidative stress, excessive excitation/electron pressures as well as photosynthetic apparatus modulation during dehydration/rehydration. By measuring ROS generation and scavenging efficiency, we found that B...
September 19, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29036516/a-two-stage-approach-of-gene-network-analysis-for-high-dimensional-heterogeneous-data
#2
Sangin Lee, Faming Liang, Ling Cai, Guanghua Xiao
Gaussian graphical models have been widely used to construct gene regulatory networks from gene expression data. Most existing methods for Gaussian graphical models are designed to model homogeneous data, assuming a single Gaussian distribution. In practice, however, data may consist of gene expression studies with unknown confounding factors, such as study cohort, microarray platforms, experimental batches, which produce heterogeneous data, and hence lead to false positive edges or low detection power in resulting network, due to those unknown factors...
July 18, 2017: Biostatistics
https://www.readbyqxmd.com/read/29033967/photosynthetic-response-of-soybean-leaf-to-wide-light-fluctuation-in-maize-soybean-intercropping-system
#3
Xingdong Yao, Hongli Zhou, Qian Zhu, Chunhong Li, Huijun Zhang, Jun-Jiang Wu, Futi Xie
In maize-soybean intercropping system, soybean plants will be affected by the wide light-fluctuation, which resulted from the shading by maize plants, as the shading of maize the light is not enough for soybean in the early morning and late afternoon, but at noon, the light is strong as the maize shading disappeared. The objective of this study is to evaluate the photosynthetic response of soybean leaf to the wide light-fluctuation. The data of diurnal variation of photosynthetic characters showed that the photosynthetic rate of intercropped soybean was weaker than that of monocropped soybean...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29033960/evaluation-of-the-cropsyst-model-during-wheat-maize-rotations-on-the-north-china-plain-for-identifying-soil-evaporation-losses
#4
Muhammad Umair, Yanjun Shen, Yongqing Qi, Yucui Zhang, Ayesha Ahmad, Hongwei Pei, Meiying Liu
The North China Plain (NCP) is a major grain production zone that plays a critical role in ensuring China's food supply. Irrigation is commonly used during grain production; however, the high annual water deficit [precipitation (P) minus evapotranspiration (ET)] in typical irrigated cropland does not support double cropping systems (such as maize and wheat) and this has resulted in the steep decline in the water table (~0.8 m year(-1) at the Luancheng station) that has taken place since the 1970s. The current study aimed to adapt and check the ability of the CropSyst model (Suite-4) to simulate actual evapotranspiration (ETa), biomass, and grain yield, and to identify major evaporation (E) losses from winter wheat (WW) and summer maize (SM) rotations...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29032071/comparing-intestinal-versus-diffuse-gastric-cancer-using-a-peff-oriented-proteomic-pipeline
#5
Helisa Helena Wippel, Marlon Dias Mariano Santos, Milan Avila Clasen, Louise Ulrich Kurt, Fabio Cesar Sousa Nogueira, Carlos Eduardo Carvalho, Thaís Messias McCormick, Guilherme Pinto Bravo Neto, Lysangela Ronalte Alves, Maria da Gloria da Costa Carvalho, Paulo Costa Carvalho, Juliana de Saldanha da Gama Fischer
Gastric cancer is the fifth most common malignant neoplasia and the third leading cause of cancer death worldwide. Mac-Cormick et al. recently showed the importance of considering the anatomical region of the tumor in proteomic gastric cancer studies; more differences were found between distinct anatomical regions than when comparing healthy versus diseased tissue. Thus, failing to consider the anatomical region could lead to differential proteins that are not disease specific. With this as motivation, we compared the proteomic profiles of intestinal and diffuse adenocarcinoma from the same anatomical region, the corpus...
October 11, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/29031498/low-free-triiodothyronine-at-admission-predicts-poststroke-infection
#6
Satoshi Suda, Junya Aoki, Takashi Shimoyama, Kentaro Suzuki, Yuki Sakamoto, Takehiro Katano, Seiji Okubo, Chikako Nito, Yasuhiro Nishiyama, Masahiro Mishina, Kazumi Kimura
BACKGROUND: Poststroke infection (PSI) is common and is usually associated with a severe prognosis. We investigated the association between PSI and thyroid hormones, which are critical to immune regulation, in patients with acute stroke. METHODS: We retrospectively enrolled 520 consecutive patients with acute ischemic stroke (326 men; age, 71.9 ± 13.2 years) admitted to our department between September 2014 and June 2016. The impact of serum thyroid hormone levels measured at admission (thyroid-stimulating hormone [TSH], free triiodothyronine [FT3], and free thyroxine [FT4]) on the PSI was evaluated using multivariate logistic regression analysis...
October 11, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29030778/acceleration-of-the-excitation-decay-in-photosystem-i-immobilized-on-glass-surface
#7
Sebastian Szewczyk, Wojciech Giera, Rafał Białek, Gotard Burdziński, Krzysztof Gibasiewicz
Femtosecond transient absorption was used to study excitation decay in monomeric and trimeric cyanobacterial Photosystem I (PSI) being prepared in three states: (1) in aqueous solution, (2) deposited and dried on glass surface (either conducting or non-conducting), and (3) deposited on glass (conducting) surface but being in contact with aqueous solvent. The main goal of this contribution was to determine the reason of the acceleration of the excitation decay in dried PSI deposited on the conducting surface relative to PSI in solution observed previously using time-resolved fluorescence (Szewczyk et al...
October 13, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/29030777/energy-transfer-and-trapping-in-synechococcus-wh-7803
#8
Alonso M Acuña, Claire Lemaire, Rienk van Grondelle, Bruno Robert, Ivo H M van Stokkum
Excitation energy transfer (EET) and trapping in Synechococcus WH 7803 whole cells and isolated photosystem I (PSI) complexes have been studied by time-resolved emission spectroscopy at room temperature (RT) and at 77 K. With the help of global and target analysis, the pathways of EET and the charge separation dynamics have been identified. Energy absorbed in the phycobilisome (PB) rods by the abundant phycoerythrin (PE) is funneled to phycocyanin (PC645) and from there to the core that contains allophycocyanin (APC660 and APC680)...
October 13, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/29029286/patterns-of-abundance-and-host-specificity-of-bat-ectoparasites-in-the-central-balkans
#9
J Burazerovic, M Orlova, M Obradovic, D Cirovic, S Tomanovic
Bats are hosts to a number of ectoparasites-acarines (ticks, chiggers, other mites), bat flies, and fleas. Bat ectoparasites might have significant ecological and public health importance as they may be potential vectors of zoonotic agents. It is important to identify their distribution, diversity, and host-parasite associations. Bat ectoparasites in the central Balkans have been largely understudied. The present research was conducted in 45 localities at the territory of Bosnia and Herzegovina, former Yugoslav Republic of Macedonia, Montenegro, and Serbia...
October 6, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/29027431/-determination-of-three-saponins-in-rhizoma-and-fibrous-root-of-trillium-tschonoskii-and-trillium-kamtschaticum
#10
Yin-Jun Yang, Xin-Guang Sun, Jie Yang, Qi Li, Jie Zhang, Yang Zhao, Bai-Ping Ma, Bao-Lin Guo
To compare the differences of main components between in rhizoma and fibrous root of Trillium tschonoskii and T. kamtschaticum, a simple, accurate and reliable high performance liquid chromatography coupled with the charged aerosol detector (HPLC-CAD) method was developed and then successfully applied for simultaneous quantitative analysis of three compounds, including polyphyllin Ⅶ (T1),pennogenin 3-O-α-L-rhamnopyranosyl-(1→2) [α-L-rhamnopyranosyl-(1→4)]-β-D-glucopyranoside (T2),polyphyllin Ⅵ (T3), in 16 batches of rhizome and 14 batches of fibrous root...
March 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29025395/proposed-risk-factors-for-infection-with-multidrug-resistant-pathogens-in-hemodialysis-patients-hospitalized-with-pneumonia
#11
Jae-Uk Song, Hye Kyeong Park, Hyung Koo Kang, Jonghoo Lee
BACKGROUND: In patients with hemodialysis-associated pneumonia (HDAP), information on both microbiologic features and antimicrobial strategies is limited. The aim of this study is to investigate predictive factors of infection with multidrug-resistant (MDR) pathogens in HDAP patients. METHODS: This was a multicenter, retrospective, and observational study. Enrolled patients were classified into MDR or non-MDR pathogens groups according to culture results. We examined risk factors of infection with MDR pathogens and created a decision support tool using these risk factors...
October 12, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29024054/multifunctional-nanohybrid-based-on-porous-silicon-nanoparticles-gold-nanoparticles-and-acetalated-dextran-for-liver-regeneration-and-acute-liver-failure-theranostics
#12
Zehua Liu, Yunzhan Li, Wei Li, Chen Xiao, Dongfei Liu, Chao Dong, Ming Zhang, Ermei Mäkilä, Marianna Kemell, Jarno Salonen, Jouni T Hirvonen, Hongbo Zhang, Dawang Zhou, Xianming Deng, Hélder A Santos
Herein, a novel nanohybrid based on porous silicon, gold nanoparticles (Au NPs), and acetalated dextran (DPSi/DAu@AcDEX) is reported to encapsulate and deliver one drug and increase the computer tomography (CT) signal for acute-liver-failure (ALF) theranostics. A microfluidic-assisted method is used to co-encapsulate different NPs in a single step. By alternating the surface properties of different NPs and by modulating the composition of the organic phase, both PSi and Au NPs are effectively encapsulated into the polymer matrix simultaneously, thus further achieving a multifunctional application...
October 11, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29022692/paper-spray-ionization-coupled-to-high-resolution-tandem-mass-spectrometry-for-comprehensive-urine-drug-testing-in-comparison-to-liquid-chromatography-coupled-techniques-after-urine-precipitation-or-dried-urine-spot-workup
#13
Julian A Michely, Markus R Meyer, Hans H Maurer
Screening procedures using high resolution (HR)-mass spectrometry (MS) are getting more and more important e.g. for drug testing or adherence monitoring. Approaches usually include time-consuming sample preparation and compound separation by liquid chromatography (LC). The paper spray ionization (PSI) technique coupled to MS might overcome these steps by direct analysis of complex mixtures without extraction and separation. In recent years, this technology proved its potential for quantification and/or qualitative screening in biofluids...
October 12, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29017828/dissecting-the-native-architecture-and-dynamics-of-cyanobacterial-photosynthetic-machinery
#14
Selene Casella, Fang Huang, David Mason, Guo-Yan Zhao, Giles N Johnson, Conrad W Mullineaux, Lu-Ning Liu
The structural dynamics and flexibility of cell membranes play fundamental roles in the functions of the cell, i.e. signaling, electron transduction, and physiological adaptation. The cyanobacterial thylakoid membrane represents a model membrane that can conduct both oxygenic photosynthesis and respiration simultaneously. Here, we conducted direct visualization of the global organization and mobility of photosynthetic complexes in thylakoid membranes from a model cyanobacterium Synechococcus elongatus PCC 7942, using high-resolution atomic force, confocal and total internal reflection fluorescence microscopy...
October 7, 2017: Molecular Plant
https://www.readbyqxmd.com/read/28992543/seasonal-dynamics-of-photosynthetic-activity-in-the-representive-brown-macroalgae-sagrassum-thunbergii-sargassaceae-phaeophyta
#15
Di Zhang, Quan Sheng Zhang, Xiao Qi Yang
The present study evaluates the seasonal photosynthetic performances of Sargassum thunbergii via chlorophyll fluorescence technique. During summer and early winter, no significant change was observed in maximum photochemical efficiency (Fv/Fm), and performance index (PIabs). During late winter and early spring, Fv/Fm, and PIabs decreased significantly, implying that S. thunbergii photosystem II (PSII) suffered apparent photoinhibition. Subsequently, PSII gradually recovered during late spring and summer, as evidenced by an increase of both parameters...
September 30, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28991987/predictors-of-phosphorus-leaching-from-bioretention-soil-media
#16
Julia G Jay, Sally L Brown, Kate Kurtz, Fritz Grothkopp
The phosphorus saturation index (PSI) and P saturation ratio (PSR) were tested across a wide range of bioretention soil mixtures (BSMs) for their relationship to total and dissolved P in column leachate. The BSMs tested were made using different feedstocks including sand alone, food and yard waste compost, biosolids and yard compost, and high Fe biosolids. The PSI of the mixtures ranged from 0.23 ± 0.03 (biosolids and yard waste compost 15%, oyster shells 5%) to 1.26 ± 0.02 (biosolids and yard waste compost 80%)...
September 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28988339/teaching-parents-behavioral-strategies-for-autism-spectrum-disorder-asd-effects-on-stress-strain-and-competence
#17
Suzannah Iadarola, Lynne Levato, Bryan Harrison, Tristram Smith, Luc Lecavalier, Cynthia Johnson, Naomi Swiezy, Karen Bearss, Lawrence Scahill
We report on parent outcomes from a randomized clinical trial of parent training (PT) versus psychoeducation (PEP) in 180 children with autism spectrum disorder (ASD) and disruptive behavior. We compare the impact of PT and PEP on parent outcomes: Parenting Stress Index (PSI), Parent Sense of Competence (PSOC), and Caregiver Strain Questionnaire (CGSQ). Mixed-effects linear models evaluated differences at weeks 12 and 24, controlling for baseline scores. Parents in PT reported greater improvement than PEP on the PSOC (ES = 0...
October 7, 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/28981780/genetic-architecture-of-photosynthesis-in-sorghum-bicolor-under-non-stress-and-cold-stress-conditions
#18
Diego Ortiz, Jieyun Hu, Maria G Salas Fernandez, Tracy Lawson
Sorghum (Sorghum bicolor L. Moench) is a C4 species sensitive to the cold spring conditions that occur at northern latitudes, especially when coupled with excessive light, and that greatly affect the photosynthetic rate. The objective of this study was to discover genes/genomic regions that control the capacity to cope with excessive energy under low temperature conditions during the vegetative growth period. A genome-wide association study (GWAS) was conducted for seven photosynthetic gas exchange and chlorophyll fluorescence traits under three consecutive temperature treatments: control (28 °C/24 °C), cold (15 °C/15 °C), and recovery (28 °C/24 °C)...
July 20, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28980426/proteomic-characterization-of-hierarchical-megacomplex-formation-in-arabidopsis-thylakoid-membrane
#19
Marjaana Rantala, Mikko Tikkanen, Eva-Mari Aro
Conversion of solar energy into chemical energy in plant chloroplasts concomitantly modifies the thylakoid architecture and hierarchical interactions between pigment-protein complexes. Here, the thylakoids were isolated from light acclimated Arabidopsis leaves and investigated with respect to the composition of the thylakoid protein complexes and their association into higher molecular mass complexes, the largest one comprising both photosystems (PS II and PSI) and light-harvesting chlorophyll a/b-binding complexes (LHCII)...
October 4, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28976913/monte-carlo-simulation-of-radiation-transport-and-dose-deposition-from-locally-released-gold-nanoparticles-labeled-with-sup-111-sup-in-sup-177-sup-lu-or-sup-90-sup-y-incorporated-into-tissue-implantable-depots
#20
Priscilla Lai, Zhongli Cai, Jean-Philippe Pignol, Eli Lechtman, Shahram Mashouf, Yijie Lu, Mitchell A Winnik, David A Jaffray, Raymond M Reilly
Permanent seed implantation (PSI) brachytherapy is a highly conformal form of radiation therapy but is challenged with dose inhomogeneity due to its utilization of low energy radiation sources. Gold nanoparticles (AuNP) conjugated with electron emitting radionuclides have recently been developed as a novel form of brachytherapy and can aid in homogenizing dose through physical distribution of radiolabeled AuNP when injected intratumorally (i.t.) in suspension. However, the distribution is unpredictable and precise placement of many injections would be difficult...
October 4, 2017: Physics in Medicine and Biology
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