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https://www.readbyqxmd.com/read/28792431/a-new-approach-to-synthesize-of-4-phenacylideneflavene-derivatives-and-to-evaluate-their-cytotoxic-effects-on-hepg2-cell-line
#1
Hongbin Chen, Yang Xu, Yinan Zhang, Zongping Zheng
In this study, a convenient approach and green procedure for the synthesis of 4-phenacylideneflavenes has been developed from the reaction between 2,4-dihydroxybenzaldehyde and substituted acetophenones using boric acid as a catalyst in polyethylene glycol 400. Seven 4-phenacylideneflavenes were synthetized and their structures were confirmed by NMR and mass spectral analyses. Meanwhile, their possible mechanism of formation was also discussed. These products were found to have potential cytotoxic effect on HepG2 cell line with IC50 values from 12...
August 9, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28753996/boron-tolerance-in-aspergillus-nidulans-is-sustained-by-the-slta-pathway-through-the-slc-family-transporters-sbta-and-sbtb
#2
María Villarino, Oier Etxebeste, Gorka Mendizabal, Aitor Garzia, Unai Ugalde, Eduardo A Espeso
Microbial cells interact with the environment by adapting to external changes. Signal transduction pathways participate in both sensing and responding in the form of modification of gene expression patterns, enabling cell survival. The filamentous fungal-specific SltA pathway regulates tolerance to alkalinity, elevated cation concentrations and, as shown in this work, also stress conditions induced by borates. Growth of sltA(-) mutants is inhibited by increasing millimolar concentrations of boric acid or borax (sodium tetraborate)...
July 21, 2017: Genes
https://www.readbyqxmd.com/read/28735711/stereoselective-separation-of-%C3%AE-adrenergic-blocking-agents-containing-two-chiral-centers-by-countercurrent-chromatography
#3
Liqiong Lv, Zhisi Bu, Mengxia Lu, Xiaoping Wang, Jizhong Yan, Shengqiang Tong
Four β-adrenergic blocking agents, including 1-[(1-methylethyl)amino]-3-phenoxy-2-propanol (1), 1-[(1-methylethyl)amino]-3-(3-methylphenoxy)-2-propanol (2), 1,1'-[1,4-phenylenebis(oxy)]bis[3-[(1-methylethyl)amino]-2-propanol (3) and 1,1'-[(4-methyl-1,2-phenylene)bis(oxy)]bis[3-[(1-methylethyl)amino]-2-propanol (4), were stereoselectively separated by countercurrent chromatography using di-n-hexyl l-tartrate and boric acid as chiral selector. The compounds (3) and (4) have four optical isomers since they contained two chiral centers...
July 14, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28732584/boric-acid-probably-increases-clinical-attachment-level-and-reduces-probing-depth-and-intrabony-defect-depth-when-used-as-an-adjunct-to-scaling-and-root-planing-in-patients-with-chronic-periodontitis
#4
Romina Brignardello-Petersen
No abstract text is available yet for this article.
July 17, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28732263/proteomic-analysis-of-naturally-occurring-boron-tolerant-plant-gypsophila-sphaerocephala-l-in-response-to-high-boron-concentration
#5
Huseyin Tombuloglu, Guzin Tombuloglu, Mehmet Serdal Sakcali, Ali Turkan, Khalid Rehman Hakeem, Hesham F Alharby, Shah Fahd, Waseem Mohammed Abdul
Gypsophila sphaerocephala is a naturally Boron (B) tolerant species that can grow around the B mining areas in Turkey, where the B concentration in soil reaches a lethal dose for plants (up to ∼8900mgkg(-1) (∼140mM). While its interesting survival capacity in extremely B containing soils, any molecular research has been conducted to understand its high tolerance mechanism yet. In the present study, we have performed a proteomic analysis of this plant to understand its high tolerance towards B-stress. Seedlings of G...
September 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28730576/effects-of-boron-supplementation-on-expression-of-hsp70-in-the-spleen-of-african-ostrich
#6
Khaliq Haseeb, Jing Wang, Ke Xiao, Ke-Li Yang, Peng-Peng Sun, Xing-Tong Wu, You Luo, Hui Song, Hua-Zhen Liu, Ju-Ming Zhong, Ke-Mei Peng
Increased synthesis of heat shock protein 70 (Hsp70) occurs in prokaryotes and eukaryotes in response to physiological, environmental, and chemical exposures, thus allowing the cell survival from fatal conditions. Hsp70 cytoprotective properties may be clarified by its anti-apoptotic function. Boron has been reported to play an essential role in various organ developments and metabolisms. However, it is not known if boron is also able to modulate the Hsp70. In the present study, the actions of boron on ostrich spleen and expression level of Hsp70 were investigated...
July 20, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28719814/enantiomeric-separation-of-seven-%C3%AE-agonists-by-nace-study-of-chiral-selectivity-with-diacetone-d-mannitol-boric-acid-complex
#7
Lili Lv, Lijuan Wang, Jun Li, Yajun Jiao, Shengnan Gao, Jiachang Wang, Hongyuan Yan
A rapid and effective nonaqueous capillary electrophoresis (NACE)-ultraviolet (UV) method was developed for the enantiomeric separation of seven β-agonists. Diacetone-d-mannitol-boric acid complex was used as a new chiral selector. It was in situ synthesized by the reaction of diacetone-d-mannitol and boric acid in methanol medium containing triethylamine. The effects of diacetone-d-mannitol, boric acid, and triethylamine concentrations on the enantioseparation were carefully investigated. Under the optimized conditions, baseline enantioseparation could be obtained for six of the tested β-agonists within 12min...
July 8, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28692333/boron-and-the-evolutionary-development-of-roots
#8
Ulrich Kutschera, Karl J Niklas
Experimental work has shown that Boron (i.e., Boric acid, B) is an essential and multifunctional microelement for vascular plant development. In addition to its other functions, which include xylem development and lignin biosynthesis, we now know that B is involved in phytohormone-signaling and influences the mechanical properties of intercellular pectins. From these data, we conclude that B played an important role during the evolutionary development of lignified tissues, and that it may have been involved in the evolution of vascular plant roots, as hypothesized by D...
July 10, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28681974/supramolecular-gel-electrophoresis-of-large-dna-fragments
#9
Shohei Tazawa, Kazuhiro Kobayashi, Takanori Oyoshi, Masamichi Yamanaka
Pulsed-field gel electrophoresis is a frequent technique used to separate exceptionally large DNA fragments. In a typical continuous field electrophoresis, it is challenging to separate DNA fragments larger than 20 kbp because they migrate at a comparable rate. To overcome this challenge, it is necessary to develop a novel matrix for the electrophoresis. Here, we de-scribe the electrophoresis of large DNA fragments up to 166 kbp using a supramolecular gel matrix and a typical continuous field electrophoresis system...
July 6, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28658656/solubility-products-of-sparingly-soluble-barium-perborates-in-aqueous-solution-that-contains-b-oh-3-and-h2o2-at-25%C3%A2-c
#10
Jui-Yen Lin, Yi-Jin Song, Yu-Jen Shih, Yao-Hui Huang
Chemical oxo-precipitation (COP) has become a promising method for treating boron wastewater at room temperature; it uses hydrogen peroxide to convert boric acid to perborate species, which are precipitated using alkaline earth metals. In this work, solubility models of barium perborates were established to predict residual boron levels from COP. The solubility product constants (pKsp) of two major barium perborates - amorphous Ba(B(OH)3OOH)2 (A-BaPB) and crystalline BaB(OH)2(OO)2B(OH)2 (C-BaPB) - were experimentally estimated (8...
June 20, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28637710/the-combined-action-of-duplicated-boron-transporters-is-required-for-maize-growth-in-boron-deficient-conditions
#11
Mithu Chatterjee, Qiujie Liu, Caitlin Menello, Mary Galli, Andrea Gallavotti
The micronutrient boron is essential in maintaining the structure of plant cell walls and is critical for high yields in crop species. Boron can move into plants by diffusion or by active and facilitated transport mechanisms. We recently showed that mutations in the maize boron efflux transporter ROTTEN EAR (RTE) cause severe developmental defects and sterility. RTE is part of a small gene family containing five additional members (RTE2-RTE6) that show tissue specific expression. The close paralogous gene RTE2 encodes a protein with 95% amino acid identity with RTE and is similarly expressed in shoot and root cells surrounding the vasculature...
June 21, 2017: Genetics
https://www.readbyqxmd.com/read/28631896/boric-acid-gel-as-local-drug-delivery-in-the-treatment-of-class-ii-furcation-defects-in-chronic-periodontitis-a-randomized-controlled-clinical-trial
#12
Sandeep Singhal, Avani Raju Pradeep, Dharmendra Kanoriya, Shruti Garg, Vibhuti Garg
AIM: Boric acid (BA) exhibits antibacterial, anti-inflammatory, as well as osteoblastic, activity. The aim of the present study was to explore the efficacy of 0.75% BA gel as a local drug-delivery system in adjunct to scaling and root planing (SRP) for the treatment of class II furcation defects in comparison with placebo gel. METHODS: A total of 48 mandibular class II furcation defects were randomized and treated with either 0.75% BA gel or placebo gel. Clinical parameters were recorded at baseline, 3 months, and 6 months, while radiographic parameters were recorded at baseline and 6 months...
June 20, 2017: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/28624888/steady-state-pharmacokinetics-of-mycophenolic-acid-in-renal-transplant-patients-exploratory-analysis-of-the-effects-of-cyclosporine-recipients-and-donors-abcc2-gene-variants-and-their-interactions
#13
N Božina, Z Lalić, S Nađ-Škegro, A Borić-Bilušić, T Božina, Ž Kaštelan, V Trkulja
PURPOSE: The study aims to evaluate the impact of recipients' and donors' polymorphisms in multidrug resistance-associated protein 2 (MRP2) gene ABCC2 -24C>T and 1249G>A on disposition of mycophenolic acid (MPA) and their interaction with cyclosporine (CsA) (compared to tacrolimus, TAC) in stable de novo adult renal transplant patients of Croatian origin. METHODS: A total of 68 recipient-donor pairs were genotyped. Steady-state pharmacokinetics of MPA was assessed by the model-independent method...
September 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28623494/the-effects-of-pesticides-on-morphology-viability-and-germination-of-blackberry-rubus-glaucus-benth-and-tree-tomato-solanum-betaceum-cav-pollen-grains
#14
Flavio Padilla, Norman Soria, Abrahan Oleas, Darwin Rueda, Bangeppagari Manjunatha, Rajesh R Kundapur, Naga Raju Maddela, Bugude Rajeswari
The objective of this study was to determine the effect of application of pesticides on morphology, viability, and germination of pollen grains of Blackberry (Rubus glaucus Benth.) and Tree tomato (Solanum betaceum Cav.). The study was performed at Patate, Tungurahua province, Ecuador and was divided into two phases. Phase one dedicated to the study of morphology, viability, and identification of nutrient solution for better germination of pollen grains and phase two for the analysis of the effect of conventional, organic, and biological pesticides on pollen grain germination and pollen tube length...
July 2017: 3 Biotech
https://www.readbyqxmd.com/read/28603241/-the-treatment-of-wounds-during-world-war-i
#15
Sergio Sabbatani, Sirio Fiorino
The First World War was a huge tragedy for mankind, but, paradoxically, it represented a source of significant progress in a broad series of human activities, including medicine, since it forced physicians to improve their knowledge in the treatment of a large number of wounded soldiers. The use of heavy artillery and machine guns, as well as chemical warfare, caused very serious and life-threatening lesions and wounds. The most frequent causes of death were not mainly related to gunshot wounds, but rather to fractures, tetanus and septic complications of infectious diseases...
June 1, 2017: Le Infezioni in Medicina
https://www.readbyqxmd.com/read/28603198/simultaneous-quantitation-of-boric-acid-and-calcium-fructoborate-in-dietary-supplements-by-hptlc-densitometry
#16
Andrei Bita, George Dan Mogosanu, Ludovic Everard Bejenaru, Carmen Nicoleta Oancea, Cornelia Bejenaru, Octavian Croitoru, Gabriela Rau, Johny Neamtu, Iulia Daria Scorei, Ion Romulus Scorei, John Hunter, Brad Evers, Boris Nemzer, Florin Anghelina, Otilia-Constantina Rogoveanu
The paper describes a new, simple, selective and precise high-performance thin-layer chromatographic (HPTLC) method for the simultaneous identification and quantitative determination of boric acid (BA) and calcium fructoborate (CFB) in bulk and tablet/capsule dosage forms of dietary supplements. HPTLC silica gel G 60 F254 precoated glass plates were used as the stationary phase. The mobile phase consisted of 2-propanol-water 8:2 (v/v). The two boron-based compounds were adequately separated with the Rf values of 0...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28595910/not-all-boronic-acids-with-a-five-membered-cycle-induce-tremor-neuronal-damage-and-decreased-dopamine
#17
Maribel Pérez-Rodríguez, Esperanza García-Mendoza, Eunice D Farfán-García, Bhaskar C Das, Fabiola J Ciprés-Flores, José G Trujillo-Ferrara, Feliciano Tamay-Cach, Marvin A Soriano-Ursúa
Several striatal toxins can be used to induce motor disruption. One example is MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine), whose toxicity is accepted as a murine model of parkinsonism. Recently, 3-Thienylboronic acid (3TB) was found to produce motor disruption and biased neuronal damage to basal ganglia in mice. The aim of this study was to examine the toxic effects of four boronic acids with a close structural relationship to 3TB (all having a five-membered cycle), as well as boric acid and 3TB. These boron-containing compounds were compared to MPTP regarding brain access, morphological disruption of the CNS, and behavioral manifestations of such disruption...
June 6, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28595011/acidities-under-the-perspective-of-energy-decomposition-analysis
#18
Rodrigo M Pontes, Ernani A Basso, Danilo E Martins, Rafael M Madeira
The rationalization of acid/base behavior is a central concern for chemistry and related fields. In this work, we describe an alternative approach toward the understanding of gas phase acidities based on the localized molecular orbital energy decomposition analysis (LMOEDA) method. Upon partitioning the molecules (and the corresponding anions) over the X-OH (or X-O(-)) bond, we have observed a perfect correlation between the interaction energy of the two fragments and the acidity, as given by the energy difference between the anion and the neutral molecule...
June 22, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28592646/loci-contributing-to-boric-acid-toxicity-in-two-reference-populations-of-drosophila-melanogaster
#19
Michael A Najarro, Jennifer L Hackett, Stuart J Macdonald
Populations maintain considerable segregating variation in the response to toxic, xenobiotic compounds. To identify variants associated with resistance to boric acid, a commonly-used household insecticide with a poorly understood mechanism of action, we assayed thousands of individuals from hundreds of strains. Using the Drosophila Synthetic Population Resource (DSPR), a multi-parental population (MPP) of inbred genotypes, we mapped six QTL to short genomic regions containing few protein-coding genes (3-188), allowing us to identify plausible candidate genes underlying resistance to boric acid toxicity...
June 7, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28575889/a-very-unique-case-of-boric-acid-intoxication-with-very-high-magnitude-rhabdomyolysis
#20
Ugo Vertolli, Marianna Alessi, Elena Naso, Agostino Naso, Lorenzo A Calò
No abstract text is available yet for this article.
May 2017: Iranian Journal of Kidney Diseases
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