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https://www.readbyqxmd.com/read/28330181/optimization-of-medium-composition-for-in-vitro-shoot-proliferation-and-growth-of-date-palm-cv-mejhoul
#1
Mouaad Amine Mazri, Reda Meziani, Jamal El Fadile, Az-Eddine Ezzinbi
The effects of major mineral salts, L-glutamine, myo-inositol and carbon source on shoot bud proliferation of date palm (Phoenix dactylifera L.) cv. Mejhoul were evaluated. Different concentrations of ammonium nitrate (NH4NO3; 550, 825 or 1650 mg/L), potassium nitrate (KNO3; 633.3, 950 or 1900 mg/L), calcium chloride dehydrate (CaCl2·2H2O; 147, 220 or 440 mg/L), potassium dihydrogen phosphate (KH2PO4; 57, 85 or 170 mg/L), magnesium sulfate heptahydrate (MgSO4·7H2O; 123, 185 or 370 mg/L), L-glutamine and myo-inositol (0...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28327965/carbon-dating-cancer-defining-the-chronology-of-metastatic-progression-in-colorectal-cancer
#2
H Lote, I Spiteri, L Ermini, A Vatsiou, A Roy, A McDonald, N Maka, M Balsitis, N Bose, M Simbolo, A Mafficini, A Lampis, J C Hahne, F Trevisani, Z Eltahir, G Mentrasti, C Findlay, Eaj Kalkman, M Punta, B Werner, S Lise, A Aktipis, C Maley, M Greaves, C Braconi, J White, M Fassan, A Scarpa, A Sottoriva, N Valeri
Background: HASH(0x5396c50) Patients often ask oncologists how long a cancer has been present before causing symptoms or spreading to other organs. The evolutionary trajectory of cancers can be defined using phylogenetic approaches but lack of chronological references makes dating the exact onset of tumours very challenging. Patients and Methods: HASH(0x4b13d10) Here we describe the case of a colorectal cancer patient presenting with synchronous lung metastasis and metachronous thyroid, chest wall and urinary tract metastases over the course of five years...
February 23, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28324720/highly-sensitive-electrochemical-detection-of-palmatine-using-a-biocompatible-multiwalled-carbon-nanotube-poly-l-lysine-composite
#3
Balamurugan Thirumalraj, Subbiramaniyan Kubendhiran, Shen-Ming Chen, Kuan-Yu Lin
To date, the natural alkaloids are mostly used in the field of pharmacological applications and the active substance of palmatine was extensively used in cancer therapy and other biomedical applications. Hence, in this study we report a simple preparation of poly-l-lysine (PLL) electro-polymerized on the surface of functionalized multiwalled carbon nanotubes (f-MWCNT) for electrochemical detection of palmatine content in human serum and urine samples. The active amino group of PLL plays a vital role towards the oxidation palmatine and exhibits superior electrocatalytic activity...
March 10, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28322330/distribution-of-bathyarchaeota-communities-across-different-terrestrial-settings-and-their-potential-ecological-functions
#4
Xing Xiang, Ruicheng Wang, Hongmei Wang, Linfeng Gong, Baiying Man, Ying Xu
High abundance and widespread distribution of the archaeal phylum Bathyarchaeota in marine environment have been recognized recently, but knowledge about Bathyarchaeota in terrestrial settings and their correlation with environmental parameters is fairly limited. Here we reported the abundance of Bathyarchaeota members across different ecosystems and their correlation with environmental factors by constructing 16S rRNA clone libraries of peat from the Dajiuhu Peatland, coupling with bioinformatics analysis of 16S rRNA data available to date in NCBI database...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28319862/multi-phase-distribution-and-comprehensive-ecological-risk-assessment-of-heavy-metal-pollutants-in-a-river-affected-by-acid-mine-drainage
#5
Jianbo Liao, Xuan Ru, Binbin Xie, Wanhui Zhang, Haizhen Wu, Chaofei Wu, Chaohai Wei
To date, there is a lack of a comprehensive research on heavy metals detection and ecological risk assessment in river water, sediments, pore water (PW) and suspended solids (SS). Here, the concentrations of heavy metals, including Cu, Zn, Mn, Cd, Pb and As, and their distribution between the four phases was studied. Samples for analysis were taken from twelve sites of the Hengshi River, Guangdong Province, China, during the rainy and dry seasons. A new comprehensive ecological risk index (CERI) based on considering metal contents, pollution indices, toxicity coefficients and water categories is offered for prediction of potential risk on aquatic organisms...
March 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28319405/heptacene-characterization-in-solution-in-the-solid-state-and-in-films
#6
Ralf Einholz, Treliant Fang, Robert Berger, Peter Grüninger, Andreas Früh, Thomas Chassé, Reinhold F Fink, Holger F Bettinger
Acenes comprise an important class of organic semiconducting materials. As graphene nanoribbons of ultimate width, they are valuable atom-precise model systems for studying the properties of this form of nanoscale carbon materials. Heptacene is the smallest member of the acene series that could only be studied under matrix isolation conditions. Its existence in bulk had never been positively confirmed, despite efforts dating back more than 70 years. We report that the reduction of 7,16-heptacenequinone produces a mixture of two diheptacene molecules...
March 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28318219/structural-exfoliation-of-layered-cathode-under-high-voltage-and-its-suppression-by-interface-film-derived-from-electrolyte-additive
#7
Yunmin Zhu, Xueyi Luo, Huozhen Zhi, Xuerui Yang, Lidan Xing, Youhao Liao, Mengqing Xu, Weishan Li
Layered cathodes for lithium-ion battery, including LiCo1-x-yNixMnyO2 and xLi2MnO3·(1-x) LiMO2 (M=Mn, Ni and Co), are attractive for large scale applications such as electric vehicles, because they can deliver additional specific capacity when the end of charge voltage is improved to over 4.2 V. However, operation under a high voltage might cause capacity decaying of layered cathodes during cycling. The failure mechanisms that have been given, up to date, include the electrolyte oxidation decomposition, the Ni, Co or Mn ion dissolution and the phase transformation...
March 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28301760/metal-free-motifs-for-solar-fuel-applications
#8
Stefan Ilic, Marija R Zoric, Usha Pandey Kadel, Yunjing Huang, Ksenija D Glusac
Metal-free motifs, such as graphitic carbon nitride, conjugated polymers, and doped nanostructures, are emerging as a new class of Earth-abundant materials for solar fuel devices. Although these metal-free structures show great potential, detailed mechanistic understanding of their performance remains limited. Here, we review important experimental and theoretical findings relevant to the role of metal-free motifs as either photoelectrodes or electrocatalysts. First, the light-harvesting characteristics of metal-free photoelectrodes (band energetics, exciton binding energies, charge carrier mobilities and lifetimes) are discussed and contrasted with those in traditional inorganic semiconductors (such as Si)...
March 15, 2017: Annual Review of Physical Chemistry
https://www.readbyqxmd.com/read/28301730/a-review-of-biorefinery-separations-for-bioproduct-production-via-thermocatalytic-processing
#9
Hannah Nguyen, Robert F DeJaco, Nitish Mittal, J Ilja Siepmann, Michael Tsapatsis, Mark A Snyder, Wei Fan, Basudeb Saha, Dionisios G Vlachos
With technological advancement of thermocatalytic processes for valorizing renewable biomass carbon, development of effective separation technologies for selective recovery of bioproducts from complex reaction media and their purification becomes essential. The high thermal sensitivity of biomass intermediates and their low volatility and high reactivity, along with the use of dilute solutions, make the bioproducts separations energy intensive and expensive. Novel separation techniques, including solvent extraction in biphasic systems and reactive adsorption using zeolite and carbon sorbents, membranes, and chromatography, have been developed...
March 15, 2017: Annual Review of Chemical and Biomolecular Engineering
https://www.readbyqxmd.com/read/28301219/management-of-comorbid-bipolar-disorder-and-substance-use-disorders
#10
Ihsan M Salloum, Edson Sherwood Brown
BACKGROUND: The comorbidity of substance use disorders (SUDs) in bipolar disorder is among the highest in psychiatric disorders. Evidence-based controlled psychosocial or pharmacological interventions trials, which may guide treatment decisions, have not been systematically reviewed. OBJECTIVE: To present a narrative review of the public health and clinical significance of this condition, including diagnostic and treatment implications, and to evaluate controlled trials conducted to date...
March 16, 2017: American Journal of Drug and Alcohol Abuse
https://www.readbyqxmd.com/read/28299936/development-of-decarboxylative-cyanation-reactions-for-c-13-c-14-carboxylic-acid-labeling-using-an-electrophilic-cyanating-reagent
#11
Fengbin Song, Rhys Salter, Lu Chen
Degradation-reconstruction approaches for isotope labeling synthesis have been known for their remarkable efficiency, but applications are scarce due to some fundamental limitations of the chemistries developed to date. The decarboxylative cyanation reaction, as a degradation-reconstruction approach, is especially useful in rapid carboxylic acid carbon isotope labeling, however development toward its application as a widespread technique has stalled at the early stages due to numerous limitations which include somewhat narrow applicability...
March 16, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28290981/case-report-of-clinical-vignette-osteopetrosis
#12
John B Moore, Thanh D Hoang, Alfred F Shwayhat
INTRODUCTION: Osteopetrosis is a connective tissue disorder resulting from abnormally dense bone predisposing patients to fracture. The clinical pattern of fractures across time and space as well as suggestive radiographic findings usually raises diagnostic suspicion. Multiple genetic mutations resulting in dysfunctional osteoclasts have been implicated in the pathogenesis of osteopetrosis with variable inheritance patterns. In severe cases, usually inherited in an autosomal recessive pattern, the medullary cavity important in the production of normal blood cell progenitors is replaced by defective endochondral bone, leading to pancytopenia and consequential extramedullary hematopoiesis...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28285622/real-life-effectiveness-of-improved-stoves-and-clean-fuels-in-reducing-pm2-5-and-co-systematic-review-and-meta-analysis
#13
REVIEW
Daniel Pope, Nigel Bruce, Mukesh Dherani, Kirstie Jagoe, Eva Rehfuess
BACKGROUND: 2.8 billion people cook with solid fuels, resulting in almost 3 million premature deaths from household air pollution (HAP). To date, no systematic assessment of impacts on HAP of 'improved' stove and clean fuel interventions has been conducted. OBJECTIVE: This systematic review synthesizes evidence for changes in kitchen and personal PM2.5 and carbon monoxide (CO) following introduction of 'improved' solid fuel stoves and cleaner fuels in low- and middle-income countries (LMIC)...
April 2017: Environment International
https://www.readbyqxmd.com/read/28285553/carbon-nanopowder-acts-as-a-trojan-horse-for-benzo-%C3%AE-pyrene-in-danio-rerio-embryos
#14
A Binelli, L Del Giacco, N Santo, L Bini, S Magni, M Parolini, L Madaschi, A Ghilardi, D Maggioni, M Ascagni, A Armini, L Prosperi, C Landi, C La Porta, C Della Torre
Carbon-based nanoparticles are largely distributed worldwide due to fossil fuel combustion and their presence in many consumer products. In addition to their proven toxicological effects in several biological models, attention in recent years has focused on the role played by carbon-based nanoparticles as Trojan-horse carriers for adsorbed environmental pollutants. This role has not been conclusively determined to date because carbon-based nanoparticles can decrease the bioavailability of contaminants or represent an additional source of intake...
March 13, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28284543/aquatic-environmental-changes-and-anthropogenic-activities-reflected-by-the-sedimentary-records-of-the-shima-river-southern-china
#15
Lei Gao, Zhuowei Wang, Jiju Shan, Jianyao Chen, Changyuan Tang, Ming Yi
Reconstructing historical sedimentary records is essential for better understanding the effects of anthropogenic activities on river environments. We used lead-210 to date riverine sediment core from the Shima River in China. We obtained a sedimentary history of 34 years (1982-2015) for core S2, which had a length of 34 cm. The sedimentation rate of 0.304-2.04 cm y(-1) was controlled by both flood events and anthropogenic activities. The conservative element content depth profiles remained relatively constant, suggestive of a relatively stable sediment provenance; therefore, the increase in the sedimentation rate over time was mainly the result of domestic and industrial wastewater effluent and the construction of a rubber dam at the middle and lower reach of the Shima River...
March 8, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28280869/biotechnological-route-for-sustainable-succinate-production-utilizing-oil-palm-frond-and-kenaf-as-potential-carbon-sources
#16
REVIEW
Abdullah Amru Indera Luthfi, Shareena Fairuz Abdul Manaf, Rosli Md Illias, Shuhaida Harun, Abdul Wahab Mohammad, Jamaliah Md Jahim
Due to the world's dwindling energy supplies, greater thrust has been placed on the utilization of renewable resources for global succinate production. Exploration of such biotechnological route could be seen as an act of counterbalance to the continued fossil fuel dominance. Malaysia being a tropical country stands out among many other nations for its plenty of resources in the form of lignocellulosic biomass. To date, oil palm frond (OPF) contributes to the largest fraction of agricultural residues in Malaysia, while kenaf, a newly introduced fiber crop with relatively high growth rate, holds great potential for developing sustainable succinate production, apart from OPF...
March 9, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28280500/post-translational-modifications-in-regulation-of-chloroplast-function-recent-advances
#17
REVIEW
Magda Grabsztunowicz, Minna M Koskela, Paula Mulo
Post-translational modifications (PTMs) of proteins enable fast modulation of protein function in response to metabolic and environmental changes. Phosphorylation is known to play a major role in regulating distribution of light energy between the Photosystems (PS) I and II (state transitions) and in PSII repair cycle. In addition, thioredoxin-mediated redox regulation of Calvin cycle enzymes has been shown to determine the efficiency of carbon assimilation. Besides these well characterized modifications, recent methodological progress has enabled identification of numerous other types of PTMs in various plant compartments, including chloroplasts...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28277363/fetoscopic-open-neural-tube-defect-repair-development-and-refinement-of-a-two-port-carbon-dioxide-insufflation-technique
#18
Michael A Belfort, William E Whitehead, Alireza A Shamshirsaz, Zhoobin H Bateni, Oluyinka O Olutoye, Olutoyin A Olutoye, David G Mann, Jimmy Espinoza, Erin Williams, Timothy C Lee, Sundeep G Keswani, Nancy Ayres, Christopher I Cassady, Amy R Mehollin-Ray, Magdalena Sanz Cortes, Elena Carreras, Jose L Peiro, Rodrigo Ruano, Darrell L Cass
OBJECTIVE: To describe development of a two-port fetoscopic technique for spina bifida repair in the exteriorized, carbon dioxide-filled uterus and report early results of two cohorts of patients: the first 15 treated with an iterative technique and the latter 13 with a standardized technique. METHODS: This was a retrospective cohort study (2014-2016). All patients met Management of Myelomeningocele Study selection criteria. The intraoperative approach was iterative in the first 15 patients and was then standardized...
March 6, 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28276507/the-interaction-effects-of-meteorological-factors-and-air-pollution-on-the-development-of-acute-coronary-syndrome
#19
Ching-Hui Huang, Heng-Cheng Lin, Chen-Dao Tsai, Hung-Kai Huang, Ie-Bin Lian, Chia-Chu Chang
This study investigated the interaction effects of meteorological factors and air pollutants on the onset of acute coronary syndrome (ACS). Data of ACS patients were obtained from the Taiwan ACS Full Spectrum Registry and comprised 3164 patients with a definite onset date during the period October 2008 and January 2010 at 39 hospitals. Meteorological conditions and air pollutant concentrations at the 39 locations during the 488-day period were obtained. Time-lag Poisson and logistic regression were used to explore their association with ACS incidence...
March 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28267345/high-indexed-pt3ni-alloy-tetrahexahedral-nanoframes-evolved-through-preferential-co-etching
#20
Chenyu Wang, Lihua Zhang, Hongzhou Yang, Jinfong Pan, Jingyue Liu, Charles Dotse, Yiliang Luan, Rui Gao, Cuikun Lin, Jun Zhang, James P Kilcrease, Xiaodong Wen, Shouzhong Zou, Jiye Fang
Chemically controlling crystal structures in nanoscale is challenging, yet provides an effective way to improve catalytic performances. Pt-based nanoframes are a new class of nanomaterials that have great potential as high-performance catalysts. To date, these nanoframes are formed through acid etching in aqueous solutions, which demands long reaction time and often yields ill-defined surface structures. Herein we demonstrate a robust and unprecedented protocol for facile development of high-performance nanoframe catalysts using size and crystallographic facet-controlled PtNi4 tetrahexahedral nanocrystals prepared through a colloidal synthesis approach as precursors...
March 14, 2017: Nano Letters
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