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https://www.readbyqxmd.com/read/28732332/heavy-metal-partitioning-of-suspended-particulate-matter-water-and-sediment-water-in-the-yangtze-estuary
#1
Chenghong Feng, Xiaoyu Guo, Su Yin, Chenhao Tian, Yangyang Li, Zhenyao Shen
The partitioning of ten heavy metals (As, Cd, Co, Cr, Cu, Hg, Ni, Pb, Sb, and Zn) between the water, suspended particulate matter (SPM), and sediments in seven channel sections during three hydrologic seasons in the Yangtze Estuary was comprehensively investigated. Special attention was paid to the role of tides, influential factors (concentrations of SPM and dissolved organic carbon, and particle size), and heavy metal speciation. The SPM-water and sediment-water partition coefficients (Kp) of the heavy metals exhibited similar changes along the channel sections, though the former were larger throughout the estuary...
July 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28732245/interleukin-4-receptor-targeted-delivery-of-bcl-xl-sirna-sensitizes-tumors-to-chemotherapy-and-inhibits-tumor-growth
#2
Padmanaban Guruprasath, Jihoon Kim, Gowri Rangaswamy Gunassekaran, Lianhua Chi, Soyoun Kim, Rang-Woon Park, Sang-Hyun Kim, Moon-Chang Baek, Sang Mun Bae, Sang-Yeob Kim, Dong-Kyu Kim, In-Kyu Park, Won-Jong Kim, Byungheon Lee
IL-4 receptor (IL-4R) is commonly up-regulated on tumor cells, and interactions between the receptor and Interleukin-4 (IL-4) can induce the expression of anti-apoptotic proteins, including Bcl-xL. This contributes to tumor cell survival and their resistance to chemotherapy. In this study, we exploited IL-4R-targeted delivery of Bcl-xL siRNA to IL-4R-expressing tumor cells in order to sensitize them to chemotherapy. To target IL-4R, an IL-4R-binding peptide, IL4RPep-1, was attached to branched polyethyleneimine-superparamagnetic iron oxide nanoparticles (BPEI-SPION)...
July 15, 2017: Biomaterials
https://www.readbyqxmd.com/read/28732015/maintenance-costs-of-serotiny-in-a-variably-serotinous-pine-the-role-of-water-supply
#3
Ruth C Martín-Sanz, Marta Callejas-Díaz, Jeanne Tonnabel, José M Climent
Serotiny is an important adaptation for plants in fire-prone environments. However, different mechanisms also induce the opening of serotinous cones in the absence of fire in variably serotinous species. Xeriscence -cone opening driven by dry and hot conditions- is considered to be mediated only by the external environment, but endogenous factors could also play a significant role. Using the variably serotinous Pinus halepensis as our model species, we determined the effects of cone age and scales density in cone opening, and using in-situ and ex-situ manipulative experiments we investigated the role of water availability in the opening of serotinous cones...
2017: PloS One
https://www.readbyqxmd.com/read/28731802/neurovascular-structures-at-risk-with-curved-retrograde-ttc-fusion-nails
#4
Cesar de Cesar Netto, David Johannesmeyer, Brent Cone, Ibukunoluwa Araoye, Parke William Hudson, Bahman Sahranavard, Michael Johnson, Ashish Shah
BACKGROUND: The purpose of this study was to assess the risk of iatrogenic injury to plantar neurovascular structures of the foot during insertion of a curved retrograde tibiotalocalcaneal (TTC) fusion nail. MATERIAL AND METHODS: Ten below-knee thawed fresh-frozen cadaveric specimens underwent curved retrograde nailing of the ankle. The shortest distance between the nail and the main plantar neurovascular branches and injured structures were recorded during dissection...
July 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28731773/visualizing-the-efimov-correlation-in-bose-polarons
#5
Mingyuan Sun, Hui Zhai, Xiaoling Cui
The Bose polaron is a quasiparticle of an impurity dressed by surrounding bosons. In few-body physics, it is known that two identical bosons and a third distinguishable particle can form a sequence of Efimov bound states in the vicinity of interspecies scattering resonance. On the other hand, in the Bose polaron system with an impurity atom embedded in many bosons, no signature of Efimov physics has been reported in the existing spectroscopy measurements to date. In this Letter, we propose that a large mass imbalance between a light impurity and heavy bosons can help produce visible signatures of Efimov physics in such a spectroscopy measurement...
July 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28731729/surveillance-snapshot-norovirus-outbreaks-among-military-forces-2008-2016
#6
(no author information available yet)
No abstract text is available yet for this article.
July 2017: MSMR
https://www.readbyqxmd.com/read/28731717/hydrogen-bond-direction-enables-palladium-catalyzed-branch-and-enantioselective-allylic-aminations-and-beyond
#7
Ya-Ni Wang, Bao-Cheng Wang, Mao-Mao Zhang, Xiao-Wen Gao, Tian-Ren Li, Liang-Qiu Lu, Wen-Jing Xiao
The palladium-catalyzed branch- and enantioselective allylic amination of vinyl benzoxazinones was accomplished through controlling the hydrogen bond direction. This protocol provides a rapid and efficient route for synthesizing an important building block, chiral amino alkene, from widely available aliphatic amines in 64 → 99% yields with up to 99% ee. Furthermore, this transformation and the accompanying products were utilized to develop one-pot reactions through dual catalysis, affording chiral indolines with good synthetic efficiency and excellent enantiocontrol...
July 21, 2017: Organic Letters
https://www.readbyqxmd.com/read/28731679/binding-of-bacteria-to-poly-n-isopropylacrylamide-modified-with-vancomycin-comparison-of-behavior-of-linear-and-highly-branched-polymers
#8
Pavintorn Teratanatorn, Richard Hoskins, Thomas Swift, C W Ian Douglas, Joanna Shepherd, Stephen Rimmer
The behavior of a linear copolymer of N-isopropyl acrylamide with pendant vancomycin functionality was compared to an analogous highly branched copolymer with vancomycin functionality at the chain ends. Highly branched poly(N-isopropylacrylamide) modified with vancomycin (HB-PNIPAM-van) was synthesized by functionalization of the HB-PNIPAM, prepared using reversible addition-fragmentation chain transfer polymerization. Linear PNIPAM with pendant vancomycin functionality (L-PNIPAM-van) was synthesized by functionalization of poly(N-isopropyl acrylamide-co-vinyl benzoic acid)...
July 21, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28731613/polyol-structure-influences-enzymatic-hydrolysis-of-bio-based-2-5-furandicarboxylic-acid-fdca-polyesters
#9
Karolina Haernvall, Sabine Zitzenbacher, Hassan Amer, Michael Thomas Zumstein, Michael Sander, Kristopher McNeill, Motonori Yamamoto, Michael Bernhard Schick, Doris Ribitsch, Georg M Guebitz
Polyesters of 2,5-furan dicarboxylic acid (FDCA) have gained attention since they can be regarded as the bio-based alternatives to the petroleum based polyesters of terephthalic acid. However, only little is known about the biodegradation and enzymatic hydrolysis of FDCA-based polyesters. This work aimed to investigate the influence of different polyols on enzymatic hydrolysis of FDCA-based polyesters. A series of polyesters containing various polyols were synthetized and analysed regarding susceptibility to enzymatic hydrolysis by cutinase 1 from Thermobifida cellulosilytica (Thc_Cut1)...
July 21, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28731588/human-leukocyte-antigen-distribution-and-genomic-ancestry-in-brazilian-patients-with-sickle-cell-disease
#10
M C F da Silva-Malta, P S Rodrigues, L W Zuccherato, F C B de Souza, E M F L Domingues, V R Souza, E Tarazona-Santos, M L Martins
Hematopoietic stem-cell transplantation (HSCT) is currently the only established curative treatment for sickle cell disease (SCD), but is limited by donor availability. Ethnicity is thought to have an impact on the complications experienced by patients that undergo HSCT and on the likelihood of identifying an HLA matched donor. In the present study, we investigated the genomic ancestry and the distribution of HLA allele groups in Brazilian patients with SCD, compared these HLA profiles to worldwide populations and evaluate the availability of HLA-matched donors...
July 21, 2017: HLA
https://www.readbyqxmd.com/read/28731465/pr-set7-deficiency-limits-uterine-epithelial-population-growth-hampering-postnatal-gland-formation-in-mice
#11
Tongtong Cui, Bo He, Shuangbo Kong, Chan Zhou, Hangxiao Zhang, Zhangli Ni, Haili Bao, Jingtao Qiu, Qiliang Xin, Danny Reinberg, John P Lydon, Jinhua Lu, Haibin Wang
Formation of secretary endometrial glands in the uterus known as adenogenesis is a typical process of branching morphogenesis involving dynamic epithelial growth and differentiation. Unsuccessful adenogenesis often leads to female infertility. However, it remains largely unexplored so far regarding the epigenetic machinery governing normal endometrial gland formation. Here, we demonstrated that PR-Set7, an epigenetic regulator for H4K20me1 modification, was extensively expressed in the postnatal uteri, and its conditional deletion resulted in a complete lack of endometrial glands and infertility in mice...
July 21, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28731331/highly-efficient-catalytic-route-for-the-synthesis-of-functionalized-silsesquioxanes
#12
Joanna Kaźmierczak, Krzysztof Kuciński, Grzegorz Hreczycho
Silsesquioxanes (POSS) have recently become the subject of growing interest in many branches of materials chemistry. Despite this great interest, no direct metal-catalyzed method to cap the corner of the POSS molecules has yet been proposed. In this report, we present a highly efficient method for the synthesis of functionalized silsesquioxanes mediated by scandium(III) triflate, which opens up the possibility of introducing a wide variety of functional groups into this class of organosilicon compounds under mild conditions with excellent yields...
July 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28731268/-13-c-metabolic-flux-profiling-of-pichia-pastoris-grown-in-aerobic-batch-cultures-on-glucose-revealed-high-relative-anabolic-use-of-tca-cycle-and-limited-incorporation-of-provided-precursors-of-branched-chain-amino-acids
#13
Meng Zhang, Xiao-Wei Yu, Yan Xu, Paula Jouhten, G V T Swapna, Ralf W Glaser, John F Hunt, Gaetano T Montelione, Hannu Maaheimo, Thomas Szyperski
Carbon metabolism of Crabtree negative yeast Pichia pastoris was profiled using (13) C NMR to delineate regulation during exponential growth and to study the import of two precursors for branched-chain amino acid biosynthesis, α-ketoisovalerate and α-ketobutyrate. Cells were grown in aerobic batch cultures containing (i) only glucose, (ii) glucose along with the precursors, or (iii) glucose and Val. The study provided the following new insights. First, (13) C flux ratio analyses of central metabolism reveal an unexpectedly high anaplerotic supply of the tricarboxylic acid cycle for a Crabtree negative yeast, and show that a substantial fraction of glucose catabolism proceeds through the pentose phosphate pathway...
July 21, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28731076/simple-gd-3-neu5nac-complexation-results-in-nmr-chemical-shift-asymmetries-of-structurally-equivalent-complex-type-n-glycan-branches
#14
Konstantin Usachev, Yoshiki Yamaguchi, Masayuki Takamatsu, Nataliya Pavlova, Vladimir Klochkov, Almira Kurbangalieva, Takefumi Murase, Taiji Shimoda, Katsunori Tanaka
In the present Communication, we propose a quite simple but previously overlooked approach for conveniently analyzing, assigning, and extracting sialic acid-containing N-glycan structures using high-resolution NMR spectroscopy without pre-installing metal chelators. Paramagnetic metals, such as Gd(3+), appear to bind to the carboxyl groups of N-acetylneuraminic acid when introduced at room temperature, leading to the measurement of nonequivalent proton and carbon NMR spectral signals among otherwise "identical" glycan branched structures...
July 21, 2017: Analyst
https://www.readbyqxmd.com/read/28730895/incidence-treatment-strategies-and-outcomes-of-acute-coronary-syndrome-with-and-without-ongoing-myocardial-ischaemia-results-from-the-czech-3-registry
#15
Petr Tousek, Klara Staskova, Anna Mala, Martin Sluka, Alexandra Vodzinska, Radek Jancar, Denisa Maluskova, Jiri Jarkovsky, Petr Widimsky
BACKGROUND: Patients with acute coronary syndrome with signs of ongoing myocardial ischaemia at first medical contact should be indicated for immediate invasive treatment. AIM: To assess the incidence, treatment strategies and outcomes of acute coronary syndrome in a large unselected cohort of patients with respect to the signs of ongoing myocardial ischaemia. METHODS: The CZECH-3 registry included 1754 consecutive patients admitted for suspected acute coronary syndrome to 43 hospitals during a 2-month period in the autumn of 2015...
July 1, 2017: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/28730516/cryptosporidium-infection-in-children-with-cancer-undergoing-chemotherapy-how-important-is-the-prevention-of-opportunistic-parasitic-infections-in-patients-with-malignancies
#16
Reza Berahmat, Mahmoud Mahami-Oskouei, Azim Rezamand, Adel Spotin, Nayyereh Aminisani, Roghayeh Ghoyounchi, Solmaz Madadi
Cryptosporidiosis is a relatively uncommon disease in healthy individuals but could be potentially worrisome in immunocompromised patients. This study aimed to evaluate Cryptosporidium infection in children with cancer undergoing chemotherapy. A case-control study was conducted in 132 children with cancer undergoing chemotherapy and 132 non-cancer controls. The modified Ziehl-Neelsen (MZN) staining and polymerase chain reaction methods were used for the detection of Cryptosporidium parasite. All positive isolates were sequenced for phylogenetic analysis...
July 20, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28730450/crispr-cas-rna-scaffolds-for-transcriptional-programming-in-yeast
#17
Jesse G Zalatan
CRISPR scaffold RNAs (scRNAs) provide a modular system for locus-specific transcriptional programming. scRNAs are generated by extending CRISPR guide RNA sequences with domains that recruit RNA-binding proteins, thus physically linking DNA binding and protein recruitment activities. A single scRNA molecule encodes information about the target locus and instructions about what regulatory function to execute at that locus. Sets of scRNA constructs can be used to generate synthetic multigene transcriptional programs in which some genes are activated and others are repressed...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28730413/updating-the-elite-rice-variety-kongyu-131-by-improving-the-gn1a-locus
#18
Xiaomin Feng, Chen Wang, Jianzong Nan, Xiaohui Zhang, Rongsheng Wang, Guoqiang Jiang, Qingbo Yuan, Shaoyang Lin
BACKGROUND: Kongyu 131 is an elite japonica rice variety of Heilongjiang Province, China. It has the characteristics of early maturity, superior quality, high yield, cold tolerance and wide adaptability. However, there is potential to improve the yield of Kongyu 131 because of the relatively few grains per panicle compared with other varieties. Hence, we rebuilt the genome of Kongyu 131 by replacing the GRAIN NUMBER1a (Gn1a) locus with a high-yielding allele from a big panicle indica rice variety, GKBR...
December 2017: Rice
https://www.readbyqxmd.com/read/28730411/sugary-endosperm-is-modulated-by-starch-branching-enzyme-iia-in-rice-oryza-sativa-l
#19
Yunjoo Lee, Min-Seon Choi, Gileung Lee, Su Jang, Mi-Ra Yoon, Backki Kim, Rihua Piao, Mi-Ok Woo, Joong Hyoun Chin, Hee-Jong Koh
BACKGROUND: Starch biosynthesis is one of the most important pathways that determine both grain quality and yield in rice (Oryza sativa L.). Sugary endosperm, sugary-1 (sug-1), is a mutant trait for starch biosynthesis. Rice plants carrying sug-1 produce grains that accumulate water-soluble carbohydrates instead of starch, even after maturity. Although this trait enhances the diversity of grain quality, sugary endosperm rice has hardly been commercialized due to the severely wrinkled grains and subsequent problems in milling...
December 2017: Rice
https://www.readbyqxmd.com/read/28730399/optical-coherence-tomography-angiography-findings-in-susac-s-syndrome-a-case-report
#20
Rodolfo Mastropasqua, Lisa Toto, Alfonso Senatore, Alessandro D'Uffizi, Piergiorgio Neri, Cesare Mariotti, Marica Tina Maccarone, Luca Di Antonio
PURPOSE: To report clinical features of Susac's syndrome (SS) using optical coherence tomography angiography (OCTA). METHODS: Case report. RESULTS: A 25-year-old Caucasian female with a history of non-pulsatile migraine, tinnitus, and verbal apraxia complaining of peripheral scotoma in left eye due to branch retinal arteriole occlusion (BRAO) was diagnosed as having SS after audiometric test, brain magnetic resonance imaging, and multimodal retinal imaging...
July 20, 2017: International Ophthalmology
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