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Boric acid

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https://www.readbyqxmd.com/read/28443835/effect-of-boric-acid-versus-conventional-irrigation-solutions-on-the-bond-strength-between-fiber-post-and-root-dentin
#1
Ahmet Kursad Culhaoglu, Erdal Özcan, Mehmet Ali Kilicarslan, Emre Seker
PURPOSE: To compare the effect of boric acid solutions of different percentages to conventional irrigation solutions on the adhesive bond strength between fiber posts and radicular dentin surface with different cement types. MATERIALS AND METHODS: One hundred fifteen extracted human incisors were endodontically instrumented to a length of 14-15 mm, and 12-mm post spaces were prepared with specific drills. Cylindrical fiber posts (Panavia Post) were luted with two different composite cements (Panavia F 2...
April 25, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/28441323/gold-nanoplates-for-a-localized-surface-plasmon-resonance-based-boric-acid-sensor
#2
Marlia Morsin, Muhamad Mat Salleh, Akrajas Ali Umar, Mohd Zainizan Sahdan
Localized surface plasmon resonance (LSPR) properties of metallic nanostructures, such as gold, are very sensitive to the dielectric environment of the material, which can simply be adjusted by changing its shape and size through modification of the synthesizing process. Thus, these unique properties are very promising, particularly for the detection of various types of chemicals, for example boric acid which is a non-permitted preservative employed in food preparations. For the sensing material, gold (Au) nanoplates with a variety of shapes, i...
April 25, 2017: Sensors
https://www.readbyqxmd.com/read/28429621/the-distribution-and-movement-of-american-cockroaches-in-urban-niches-of-new-orleans
#3
John C Carlson, Felicia A Rabito, Derek Werthmann, Mark Fox
American cockroaches are an important source of household allergens in tropical and semitropical climates. To determine which outdoor niches produce American cockroaches, traps were placed at 40 homes in New Orleans to collect nymphs. Nymphs were collected from the sewers, yards, and within the homes themselves. To compare sewers and yards as sources of cockroaches entering homes, adult cockroaches were collected, marked, and released into yards and sewers. No sewer-released cockroaches were collected in homes...
April 1, 2017: Clinical Pediatrics
https://www.readbyqxmd.com/read/28426679/control-of-zoonotic-cutaneous-leishmaniasis-vector-phlebotomus-papatasi-using-attractive-toxic-sugar-baits-atsb
#4
Abedin Saghafipour, Hassan Vatandoost, Ali Reza Zahraei-Ramazani, Mohammad Reza Yaghoobi-Ershadi, Yavar Rassi, Moharram Karami Jooshin, Mohammad Reza Shirzadi, Amir Ahmad Akhavan
INTRODUCTION: Attractive Toxic Sugar Baits (ATSB) is a new vector control method that meets Integrated Vector Management (IVM) goals. In an experimental design, this study aimed to determine effects of ATSB on control of Phlebotomus papatasi, as a main vector of Zoonotic Cutaneous Leishmaniasis (ZCL), in Qom Province, center of Iran. METHODS: In a cross-sectional design, boric acid was mixed with brown sugar solution and tested as toxic baits for P. papatasi. Two methods were utilized to use the baits: (a) spraying ATSB on vegetation, bushes, and shrubs; and (b) setting ATSB-treated barrier fences in front of colonies at 500 m distance from the houses in outskirts of villages...
2017: PloS One
https://www.readbyqxmd.com/read/28401221/synthesis-of-two-titanosilicates-with-distinct-interlayer-connections-from-similar-gels
#5
Peng Ji, Kun Lu, Xinqing Lu, Hao Xu, Peng Wu
Ti-SSZ-70 and Ti-ECNU-6, with identical intralayer structures but distinct interlayer connections, were prepared from similar synthetic gels free of alkali metal ions and boric acid. Ti-SSZ-70, composed of vertically misaligned MWW layers, was transferred to Ti-ECNU-6, structurally analogous to the Ti-MWW zeolite with a well-aligned layer stacking, upon the addition of an appropriate amount of hexamethyleneimine to the gel. These two titanosilicate catalysts exhibited outstanding catalytic activities in the liquid-phase alkene epoxidation...
April 12, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28396085/electrophoretically-mediated-microanalysis-for-simultaneous-on-capillary-derivatization-of-standard-amino-acids-followed-by-micellar-electrokinetic-capillary-chromatography-with-laser-induced-fluorescence-detection
#6
Andrea Celá, Aleš Mádr, Zdeněk Glatz
Amino acids are crucial compounds involved in most biochemical processes essential for life. Since their dynamic turnover reflects the actual physiology of the cell/organism, a turnover assessment may provide valuable information related to multiple physiological and pathophysiological conditions. The sensitive determination of amino acids is predominantly associated with their derivatization which might be laborious, time-consuming and difficult to standardize. However, capillary electrophoresis offers the automatic injection and mixing of reactants, incubation of the reaction mixture, separation and detection of the reaction products in one on-capillary procedure...
March 31, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28393528/one-step-transformation-of-coenzyme-a-into-analogues-by-transamidation
#7
Randy Sanichar, John C Vederas
Several coenzyme A (CoA) analogues are made in a single step under mild conditions via transamidation reactions catalyzed by boric acid in water. This approach offers rapid access to compounds useful for the study of a wide spectrum of enzyme catalyzed reactions, especially processes involving acyl carrier proteins (ACP) of polyketide synthases (PKS), fatty acid synthases (FAS), and nonribosomal peptide synthetases (NRPS). The CoA analogues presented are readily elaborated or extended by precedented reactions for specific applications that may be required...
April 10, 2017: Organic Letters
https://www.readbyqxmd.com/read/28391495/boric-acid-inhibition-of-trichophyton-rubrum-growth-and-conidia-formation
#8
Martin Schmidt
Trichophyton rubrum is a common human dermatophyte that is the causative agent of 80-93% of fungal infections of the skin and nails. While dermatophyte infections in healthy people are easily treatable with over-the-counter medications, such infections pose a higher risk for patients with compromised immune function and impaired regenerative potential. The efficacy of boric acid (BA) for the treatment of vaginal yeast infections prompted an investigation of the effect of BA on growth and morphology of T. rubrum...
April 8, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28387830/development-of-liquid-bait-with-unique-bait-station-for-control-of-dolichoderus-thoracicus-hymenoptera-formicidae
#9
Chung-Chi Lin, Tsai-Wei Chang, Hung-Wei Chen, Chung-Han Shih, Po-Cheng Hsu
The Dolichoderus thoracicus (Smith) has seriously infested urban, village, and agricultural environments in Taiwan. To develop optimal bait for the effective control of D. thoracicus, we investigated the feeding preferences of this ant at different sugar and amino acid concentrations in a laboratory setting. The number of feeding workers was significantly higher for 20% sucrose compared with that for other sugars at 10% and 20% concentrations. Furthermore, among all tested concentrations of monosodium glutamate (MSG; 1%, 3%, 5%, and 10%), the highest number of ants were attracted by 1% MSG with 20% sucrose...
April 6, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28374970/human-bj-fibroblasts-is-an-alternative-to-mouse-balb-c-3t3-cells-in-in-vitro-neutral-red-uptake-assay
#10
Marika Mannerström, Tarja Toimela, Jertta-Riina Sarkanen, Tuula Heinonen
The OECD GD 129 BALB/c 3T3 Neutral Red Uptake (NRU) assay is a standardized test method for estimating starting dose for an acute oral systemic toxicity test in rodents. Mouse BALB/c 3T3 fibroblasts are the most commonly used cells in the NRU assay. We have previously transferred and validated BALB/c 3T3 NRU assay in our GLP laboratory. Subsequently, in order to obtain more human relevant cytotoxicity data, we performed an intra-laboratory validation using human BJ fibroblasts in the NRU assay instead of mouse BALB/c 3T3 fibroblasts...
April 4, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28373517/threonine-phosphorylation-regulates-polar-localization-of-the-boric-acid-transporter-nip5-1-in-root-cells
#11
Gregory Bertoni
No abstract text is available yet for this article.
April 3, 2017: Plant Cell
https://www.readbyqxmd.com/read/28368904/preparation-and-anticancer-activity-evaluation-of-an-amorphous-drug-nanocomposite-by-simple-heat-treatment
#12
Honglei Zhan, Jun F Liang
The solubility of drug molecules is closely related to its bioactivity as it affects the dissolution rate and bioavailability, especially in the case of BCS IV drugs like camptothecin (CPT), a potential broad-spectrum anticancer agent. In this study, we construct a novel boric acid (BA)-coated CPT nanocomposite by means of a simple heat-treatment approach, which combines nanoscale size range and amorphous solid state together to improve the overall dissolution rate of CPT. This new CPT formulation showed a rod-like structure with nanoscale size and amorphous solid nature...
March 31, 2017: Anti-cancer Drugs
https://www.readbyqxmd.com/read/28342883/kinetic-and-mechanistic-study-of-the-ph-dependent-activation-epoxidation-of-prodrug-treosulfan-including-the-reaction-inhibition-in-a-borate-buffer
#13
Michał Romański, Whitney Ratajczak, Franciszek Główka
A prodrug treosulfan (T) undergoes a pH-dependent activation to epoxide derivatives. The process seems to involve an intramolecular Williamson reaction (IWR) but clear kinetic evidence is lacking. Moreover, a cis-diol system present in the T structure is expected to promote complexation with boric acid. As a result, the prodrug epoxidation would be inhibited, however this phenomenon has not been investigated. In this paper, the effect of pH on the kinetics of T conversion to its monoepoxide was studied from a mechanistic point of view...
March 22, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28341806/polar-localization-of-the-nip5-1-boric-acid-channel-is-maintained-by-endocytosis-and-facilitates-boron-transport-in-arabidopsis-roots
#14
Sheliang Wang, Akira Yoshinari, Tomoo Shimada, Ikuko Hara-Nishimura, Namiki Mitani-Ueno, Jian Feng Ma, Satoshi Naito, Junpei Takano
Boron uptake in Arabidopsis thaliana is mediated by nodulin 26-like intrinsic protein (NIP)5;1, a boric acid channel that is located preferentially on the soil side of the plasma membrane in root cells. However, the mechanism underlying this polar localization is poorly understood. Here, we show that the polar localization of NIP5;1 in epidermal and endodermal root cells is mediated by the phosphorylation of Thr residues in the conserved TPG (ThrProGly) repeat in the N-terminal region of NIP5;1. Although substitutions of Ala for three Thr residues in the TPG repeat did not affect lateral diffusion in the plasma membrane, these substitutions inhibited endocytosis and strongly compromised the polar localization of GFP-NIP5;1...
March 24, 2017: Plant Cell
https://www.readbyqxmd.com/read/28334270/development-of-diagnostic-insecticide-concentrations-and-assessment-of-insecticide-susceptibility-in-german-cockroach-dictyoptera-blattellidae-field-strains-collected-from-public-housing
#15
Mahsa Fardisi, Ameya D Gondhalekar, Michael E Scharf
Insecticide resistance in German cockroaches (Blattella germanica (L.)) has been a barrier to effective control since its first documentation in the 1950s. A necessary first step toward managing resistance is to understand insecticide susceptibility profiles in field-collected strains so that active ingredients (AIs) with lowest resistance levels can be identified. As a first step in this study, diagnostic concentrations (DCs) were determined for 14 insecticide AIs based on lethal concentrations that killed 99% or 90% of the individuals from a susceptible lab strain (JWax-S)...
March 20, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28318942/cyclic-mu-opioid-receptor-ligands-containing-multiple-n-methylated-amino-acid-residues
#16
Anna Adamska-Bartłomiejczyk, Anna Janecka, Márton Richárd Szabó, Maria Camilla Cerlesi, Girolamo Calo, Alicja Kluczyk, Csaba Tömböly, Attila Borics
In this study we report the in vitro activities of four cyclic opioid peptides with various sequence length/macrocycle size and N-methylamino acid residue content. N-Methylated amino acids were incorporated and cyclization was employed to enhance conformational rigidity to various extent. The effect of such modifications on ligand structure and binding properties were studied. The pentapeptide containing one endocyclic and one exocyclic N-methylated amino acid displayed the highest affinity to the mu-opioid receptor...
March 7, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28314961/ecotoxicity-of-boric-acid-in-standard-laboratory-tests-with-plants-and-soil-organisms
#17
REVIEW
Juliska Princz, Leonie Becker, Adam Scheffczyk, Gladys Stephenson, Rick Scroggins, Thomas Moser, Jörg Römbke
To verify the continuous sensitivity of ecotoxicological tests (mainly the test organisms), reference substances with known toxicity are regularly tested. Ideally, this substance(s) would lack specificity in its mode action, be bioavailable and readily attainable with cost-effective means of chemical characterization. Boric acid has satisfied these criteria, but has most recently been characterized as a substance of very high concern, due to reproductive effects in humans, thus limiting its recommendation as an ideal reference toxicant...
March 17, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28304112/evaluation-of-various-approaches-to-the-isolation-of-steroid-hormones-from-urine-samples-prior-to-fass-mekc-analysis
#18
Ilona Olędzka, Piotr Kowalski, Alina Plenis, Tomasz Bączek
The goal of this study was to assess various analytical approaches for the simultaneous and efficient extraction of steroid hormones (cortisone, cortisol, prednisolone, corticosterone, testosterone, 17α-methyltestosterone, epitestosterone, progesterone) from urine samples prior to separation based on field-amplified sample stacking-micellar electrokinetic chromatography (FASS-MEKC). FASS-MEKC successfully allowed the compounds to be separated within 12 min using a background electrolyte (BGE) comprised of 5 mM sodium tetraborate, 150 mM boric acid, 50 mM SDS and 15% methanol...
March 17, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28300266/boric-acid-destabilized-lithium-borohydride-with-a-5-6-wt-dehydrogenation-capacity-at-moderate-temperatures
#19
Yong Wu, Xiaojing Jiang, Jun Chen, Yue Qi, Yuxuan Zhang, He Fu, Jie Zheng, Xingguo Li
Boric acid effectively promotes the dehydrogenation of lithium borohydride due to the interactions between protonic and hydridic hydrogen. The simple mixture of LiBH4-(4/3)B(OH)3 can release 5.6 wt% hydrogen below 180 °C with only a trace amount of water, thus constituting a highly attractive single-use hydrogen storage material.
March 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28285642/a-new-hope-for-obesity-management-boron-inhibits-adipogenesis-in-progenitor-cells-through-the-wnt-%C3%AE-catenin-pathway
#20
Ayşegül Doğan, Selami Demirci, Hüseyin Apdik, Omer Faruk Bayrak, Sukru Gulluoglu, Emre Can Tuysuz, Oleg Gusev, Albert A Rizvanov, Emrah Nikerel, Fikrettin Şahin
Obesity is a worldwide medical problem resulting in serious morbidity and mortality involving differentiation of pre-adipocytes into mature adipocytes (adipogenesis). Boron treatment has been reported to be associated with weight reduction in experimental animals; however, its effects on pre-adipocyte differentiation and anti-adipogenic molecular mechanisms are unknown. In this study, we demonstrate the inhibitory activities of boric acid (BA) and sodium pentaborate pentahydrate (NaB) on adipogenesis using common cellular models...
April 2017: Metabolism: Clinical and Experimental
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