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https://www.readbyqxmd.com/read/28809947/high-density-genetic-linkage-map-construction-by-f2-populations-and-qtl-analysis-of-early-maturity-traits-in-upland-cotton-gossypium-hirsutum-l
#1
Libei Li, Shuqi Zhao, Junji Su, Shuli Fan, Chaoyou Pang, Hengling Wei, Hantao Wang, Lijiao Gu, Chi Zhang, Guoyuan Liu, Dingwei Yu, Qibao Liu, Xianlong Zhang, Shuxun Yu
Due to China's rapidly increasing population, the total arable land area has dramatically decreased; as a consequence, the competition for farming land allocated for grain and cotton production has become fierce. Therefore, to overcome the existing contradiction between cotton grain and fiber production and the limited farming land, development of early-maturing cultivars is necessary. In this research, a high-density linkage map of upland cotton was constructed using genotyping by sequencing (GBS) to discover single nucleotide polymorphism (SNP) markers associated with early maturity in 170 F2 individuals derived from a cross between LU28 and ZHONG213...
2017: PloS One
https://www.readbyqxmd.com/read/28801587/temozolomide-arrests-glioma-growth-and-normalizes-intratumoral-extracellular-ph
#2
Jyotsna U Rao, Daniel Coman, John J Walsh, Meser M Ali, Yuegao Huang, Fahmeed Hyder
Gliomas maintain an acidic extracellular pH (pHe), which promotes tumor growth and builds resistance to therapy. Given evidence that acidic pHe beyond the tumor core indicates infiltration, we hypothesized that imaging the intratumoral pHe in relation to the peritumoral pHe can provide a novel readout of therapeutic influence on the tumor microenvironment. We used Biosensor Imaging of Redundant Deviation in Shifts (BIRDS), which utilizes chemical shifts of non-exchangeable protons from macrocyclic chelates (e...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28800830/modeling-carbon-dioxide-effect-in-a-controlled-atmosphere-and-its-interactions-with-temperature-and-ph-on-the-growth-of-l-%C3%A2-monocytogenes-and-p-%C3%A2-fluorescens
#3
Olivier Couvert, Stéphanie Guégan, Bernard Hézard, Véronique Huchet, Adrienne Lintz, Dominique Thuault, Valérie Stahl
The effect of carbon dioxide, temperature, and pH on growth of Listeria monocytogenes and Pseudomonas fluorescens was studied, following a protocol to monitor microbial growth under a constant gas composition. In this way, the CO2 dissolution didn't modify the partial pressures in the gas phase. Growth curves were acquired at different temperatures (8, 12, 22 and 37 °C), pH (5.5 and 7) and CO2 concentration in the gas phase (0, 20, 40, 60, 80, 100% of the atmospheric pressure, and over 1 bar). These three factors greatly influenced the growth rate of L...
December 2017: Food Microbiology
https://www.readbyqxmd.com/read/28798306/hyperspectral-imaging-for-predicting-the-internal-quality-of-kiwifruits-based-on-variable-selection-algorithms-and-chemometric-models
#4
Hongyan Zhu, Bingquan Chu, Yangyang Fan, Xiaoya Tao, Wenxin Yin, Yong He
We investigated the feasibility and potentiality of determining firmness, soluble solids content (SSC), and pH in kiwifruits using hyperspectral imaging, combined with variable selection methods and calibration models. The images were acquired by a push-broom hyperspectral reflectance imaging system covering two spectral ranges. Weighted regression coefficients (BW), successive projections algorithm (SPA) and genetic algorithm-partial least square (GAPLS) were compared and evaluated for the selection of effective wavelengths...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28797147/understanding-the-spatial-distribution-of-factors-controlling-topsoil-organic-carbon-content-in-european-soils
#5
M Rial, A Martínez Cortizas, L Rodríguez-Lado
Soil Organic Carbon (SOC) constitutes the largest terrestrial carbon pool. The understanding of its dynamics and the environmental factors that influence its behaviour as sink or source of atmospheric CO2 is crucial to quantify the carbon budget at the global scale. At the European scale, most of the existing studies to account for SOC stocks are centred in the fitting of predictive model to ascertain the distribution of SOC. However, the development of methodologies for monitoring and identifying the environmental factors that control SOC storage in Europe remains a key research challenge...
August 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28795675/-clinical-application-of-abdominal-lifting-and-compression-cardiopulmonary-resuscitation-method-for-treatment-of-patients-with-cardiac-arrest
#6
Haishan Li, Liu Ji, Jingjing Wang
OBJECTIVE: To investigate the clinical application of rhythmic abdominal lifting and compression cardiopulmonary resuscitation (ALC-CPR) in cardiac arrest (CA) patients with conventional cardiopulmonary resuscitation (CPR) contraindication (chest rib fracture, chest trauma, etc.). METHODS: The clinical data of patients with CA in emergency department of Hefei Second People's Hospital from June 2015 to December 2016 were analyzed retrospectively, and the patients with weights 40-150 kg and CA≤20 minutes, and resuscitated with ALC-CPR were selected...
August 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28780391/structural-characterization-and-physicochemical-stability-profile-of-a-double-mutant-heat-labile-toxin-dmlt-protein-based-adjuvant
#7
Vishal M Toprani, John M Hickey, Neha Sahni, Ronald T Toth, George A Robertson, C Russell Middaugh, Sangeeta B Joshi, David B Volkin
A novel protein adjuvant double mutant E.coli heat labile toxin, LT(R192G/L211A) or dmLT, is in preclinical and early clinical development with various vaccine candidates. Structural characterization and formulation development of dmLT will play a key role in its successful process development, scale-up/transfer and commercial manufacturing. This work describes extensive analytical characterization of structural integrity and physicochemical stability profile of dmLT from a lyophilized clinical formulation...
August 2, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28770992/in-silico-screening-of-two-dimensional-separation-selectivity-for-ion-chromatography-%C3%A3-capillary-electrophoresis-separation-of-low-molecular-mass-organic-acids
#8
Leila Ranjbar, Mohammad Talebi, Paul Raymond Haddad, Soo Hyun Park, Joan Marc Cabot, Min Zhang, Petr Smejkal, Joe P Foley, Michael C Breadmore
A prerequisite for ordered two-dimensional (2D) separations and full utilisation of the enhanced 2D peak capacity is selec-tive exploitation of the sample attributes, described as sample dimensionality. In order to take sample dimensionality into account prior to optimisation of a 2D separation, a new concept based on construction of 2D separation selectivity maps is proposed and demonstrated for ion chromatography × capillary electrophoresis (IC×CE) separation of low-molecular-mass organic acids as test analytes...
August 3, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28738784/identification-and-characterization-of-suppressor-mutants-of-stop1
#9
Fei Jiang, Tao Wang, Yuqi Wang, Leon V Kochian, Fang Chen, Jiping Liu
BACKGROUND: Proton stress and aluminum (Al) toxicity are major constraints limiting crop growth and yields on acid soils (pH < 5). In Arabidopsis, STOP1 is a master transcription factor that controls the expression of a set of well-characterized Al tolerance genes and unknown processes involved in low pH resistance. As a result, loss-of-function stop1 mutants are extremely sensitive to low pH and Al stresses. RESULTS: Here, we report on screens of an ethyl-methane sulphonate (EMS)-mutagenized stop1 population and isolation of nine strong stop1 suppressor mutants, i...
July 24, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28737680/mapping-quantitative-trait-loci-qtl-for-resistance-to-late-blight-in-tomato
#10
Dilip R Panthee, Ann Piotrowski, Ragy Ibrahem
Late blight caused by Phytophthora infestans (Montagne, Bary) is a devastating disease of tomato worldwide. There are three known major genes, Ph-1, Ph-2, and Ph-3, conferring resistance to late blight. In addition to these three genes, it is also believed that there are additional factors or quantitative trait loci (QTL) conferring resistance to late blight. Precise molecular mapping of all those major genes and potential QTL is important in the development of suitable molecular markers and hence, marker-assisted selection (MAS)...
July 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28734351/capillary-electrophoresis-tandem-mass-spectrometry-as-a-highly-selective-tool-for-the-compositional-and-site-specific-assessment-of-multiple-peptide-deamidation
#11
Elena Dominguez-Vega, Thomas De Vijlder, Edwin P Romijn, Govert W Somsen
Site-specific mapping of multiple deamidations in peptides is a challenging analytical task. In this work, capillary electrophoresis-tandem mass spectrometry (CE-MS/MS) is presented as a high-resolution tool for the detailed characterization of these subtle modifications in peptides. The 4.5-kDa peptide drug TRI-1144, which contains five closely-positioned potential deamidation sites, was selected as model compound. TRI-1144 was exposed to acidic conditions and/or elevated temperatures for 1-14 h. Stressed samples were analyzed using a background electrolyte (BGE) of 150 mM ammonium formate (pH 6...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28732036/an-accurate-coarse-grained-model-for-chitosan-polysaccharides-in-aqueous-solution
#12
Levan Tsereteli, Andrea Grafmüller
Computational models can provide detailed information about molecular conformations and interactions in solution, which is currently inaccessible by other means in many cases. Here we describe an efficient and precise coarse-grained model for long polysaccharides in aqueous solution at different physico-chemical conditions such as pH and ionic strength. The Model is carefully constructed based on all-atom simulations of small saccharides and metadynamics sampling of the dihedral angles in the glycosidic links, which represent the most flexible degrees of freedom of the polysaccharides...
2017: PloS One
https://www.readbyqxmd.com/read/28731900/micro-and-macro-circulatory-changes-during-sepsis-and-septic-shock-in-a-rat-model
#13
Tianfeng Hua, Xiaobo Wu, Wei Wang, Hao Li, Jennifer Bradley, Mary Ann Peberdy, Joseph P Ornato, Wanchun Tang
Microcirculation is the motor of sepsis. In the present study, we investigated whether microcirculatory alterations occur prior to changes of systemic hemodynamics in a rat model of cecum ligation and puncture (CLP)-induced sepsis. We further investigated renal microcirculatory changes during sepsis and compared those with buccal microcirculation. Twelve male Sprague-Dawley rats were randomized into a sham control group (n = 6) and a CLP group (n = 6). Perfused microvessel density (PVD) and microvascular flow index (MFI) were evaluated using sidestream dark field (SDF) video microscopy at baseline, 60, 120, 180, 240, 300, and 360 minutes following CLP...
July 20, 2017: Shock
https://www.readbyqxmd.com/read/28729352/optical-imaging-of-surface-chemistry-and-dynamics-in-confinement
#14
Carlos Macias-Romero, Igor Nahalka, Halil I Okur, Sylvie Roke
We imaged the interfacial structure and dynamics of water in a microscopically confined geometry in three dimensions and on millisecond time scales with a 3D structurally illuminated wide-field second harmonic microscope. Image contrast reports on the orientational order of interfacial water, induced by charge-dipole interactions between water molecules and surface charges. The images were converted into surface potential maps. Spatially resolved surface acid dissociation constant pKa,s values were determined for the silica deprotonation reaction by following pH induced chemical changes on the curved and confined surfaces of a glass micro-capillary immersed in aqueous solutions...
July 20, 2017: Science
https://www.readbyqxmd.com/read/28725115/maternal-and-fetal-arterial-blood-gas-data-in-normotensive-singleton-isoflurane-anesthetized-sheep-at-124-126-days-of-gestation
#15
Claire M Loughran, Matthew W Kemp, Gabrielle C Musk
The aim of this case series was to describe the differences between maternal and fetal blood-gas results during anesthesia. Sixteen singleton adult merino ewes weighing 60.1 ± 5.1 kg at 125.7 d (124 to 126 d) gestation were anesthetized. Maternal (radial) and fetal (umbilical) arterial blood gas samples were collected 79 ± 6 min after the start of anesthesia if maternal mean arterial pressure (MAP) was stable and > 65 mmHg. Fetal pH, partial arterial pressure of oxygen (PaO2), glucose, arterial hemoglobin oxygen saturation (SaO2), sodium, and chloride were significantly lower and fetal partial arterial pressure of carbon dioxide (PaCO2), lactate, hematocrit, total hemoglobin, potassium, and calcium were significantly higher than maternal blood-gas values...
July 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28721718/sensitive-analysis-of-nitroguanidine-in-aqueous-and-soil-matrices-by-lc-ms
#16
Anna Voloshenko Rossin, Sergey Sladkevich, Guy Gasser, Artem Melman, Ovadia Lev
Nitroguanidine, a widely used nitramine explosive, is an environmental contaminant that is refractory, persistent, highly mobile in soils and aquifers, and yet under-researched. Nitroguanidine determination in water and soil poses an analytical challenge due its high hydrophilicity, low volatility, charge neutrality over a wide pH range, and low proton affinity which results in low electrospray interface (ESI)-MS sensitivity. A sensitive method for the determination of nitroguanidine in aqueous and soil matrices was developed...
August 3, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28720936/the-effects-of-superchilling-with-modified-atmosphere-packaging-on-the-physicochemical-properties-and-shelf-life-of-swimming-crab
#17
Bowen Sun, Yuanhui Zhao, Jiangang Ling, Jingfen Yu, Haitao Shang, Zunying Liu
The objective of the present study was to investigate the effects of superchilling with modified atmosphere packaging on the physicochemical properties and shelf life of swimming crab. As the storage time increased, the rates at which the total aerobic plate count, total volatile basic nitrogen, pH, peroxide value and thiobarbituric acid-reactive substances value increase were significantly lower for the superchilling with modified atmosphere packaging (SCS + MAP) treatment compared to superchilling storage (SCS) and chilling storage (CS)...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28718095/changes-in-sub-soil-river-water-quality-upon-its-open-storage-a-case-study
#18
A K Mohanty, K K Satpathy, M V R Prasad
A study was carried out to investigate the changes in the physicochemical and biological properties of sub-soil river water upon its storage in a man-made reservoir. Palar sub-soil and reservoir water samples were collated fortnightly for a period of 5 years (2010-2014). The open reservoir is used as a reliable raw water source for condenser cooling systems and for the demineralizing (DM) plant input of Fast Breeder Test Reactor (FBTR), Madras Atomic Power Station (MAPS), and other laboratories at Kalpakkam, southeast coast of India...
August 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28714513/in-vivo-evaluation-of-tumour-acidosis-for-assessing-the-early-metabolic-response-and-onset-of-resistance-to-dichloroacetate-by-using-magnetic-resonance-ph-imaging
#19
Annasofia Anemone, Lorena Consolino, Laura Conti, Francesca Reineri, Federica Cavallo, Silvio Aime, Dario Livio Longo
Dichloroacetate (DCA) can reverse the glycolytic phenotype that is responsible of increased lactate production and extracellular pH acidification in cancer cells. Magnetic resonance imaging-chemical exchange saturation transfer (MRI-CEST) pH mapping is a novel non-invasive imaging approach that can measure in vivo extracellular tumour pH. We examined whether MRI-CEST pH mapping can monitor in vivo changes in tumour acidosis for assessing treatment response to DCA. Cell viability and extracellular pH were assessed in TS/A breast cancer cells treated with 1-10 mM DCA for 24 h in normoxia or hypoxia (1% O2) conditions...
August 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28709157/hypotensive-resuscitation-with-hypertonic-saline-dextran-improves-survival-in-a-rat-model-of-hemorrhagic-shock-at-high-altitude
#20
Jingxiang Zhao, Guoxing You, Bo Wang, Zhenwei Sun, Zhen Wang, Sha Xia, Lian Zhao, Hong Zhou
OBJECTIVE: To compare the efficacy of hypotensive resuscitation with hypertonic saline dextran 70 (HSD) and lactated Ringer (LR) solutions in a rat model of hemorrhagic shock at a simulated altitude of 4,000 m. METHODS: Anesthetized rats were bled to maintain their mean arterial pressure (MAP) at 45 mm Hg for 1 h. The distal quarter of the tail was then amputated to allow free blood loss; rats were simultaneously resuscitated with 4 mL kg HSD (HSD group, n = 10) or 4 mL kg LR (LR group, n = 10), followed by hypotensive resuscitation with LR to maintain MAP at 55 to 60 mm Hg for 1 h...
August 2017: Shock
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