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Showing 1 to 12 of 1684 entries
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Comparison of ultrasonic-assisted and regular leaching of germanium from by-product of zinc metallurgy.

Ultrasonics sonochemistry

Zhang L, Guo W, Peng J, Li J, Lin G, Yu X.
PMID: 26964934
Ultrason Sonochem. 2016 Jul;31:143-9. doi: 10.1016/j.ultsonch.2015.12.006. Epub 2015 Dec 10.

A major source of germanium recovery and also the source of this research is the by-product of lead and zinc metallurgical process. The primary purpose of the research is to investigate the effects of ultrasonic assisted and regular methods...

Ultrafast 2D IR spectroscopy of the excess proton in liquid water.

Science (New York, N.Y.)

Thämer M, De Marco L, Ramasesha K, Mandal A, Tokmakoff A.
PMID: 26430117
Science. 2015 Oct 02;350(6256):78-82. doi: 10.1126/science.aab3908.

Despite decades of study, the structures adopted to accommodate an excess proton in water and the mechanism by which they interconvert remain elusive. We used ultrafast two-dimensional infrared (2D IR) spectroscopy to investigate protons in aqueous hydrochloric acid solutions....

Enamel microabrasion: An overview of clinical and scientific considerations.

World journal of clinical cases

Pini NI, Sundfeld-Neto D, Aguiar FH, Sundfeld RH, Martins LR, Lovadino JR, Lima DA.
PMID: 25610848
World J Clin Cases. 2015 Jan 16;3(1):34-41. doi: 10.12998/wjcc.v3.i1.34.

Superficial stains and irregularities of the enamel are generally what prompt patients to seek dental intervention to improve their smile. These stains or defects may be due to hypoplasia, amelogenesis imperfecta, mineralized white spots, or fluorosis, for which enamel...

Listeria monocytogenes varies among strains to maintain intracellular pH homeostasis under stresses by different acids as analyzed by a high-throughput microplate-based fluorometry.

Frontiers in microbiology

Cheng C, Yang Y, Dong Z, Wang X, Fang C, Yang M, Sun J, Xiao L, Fang W, Song H.
PMID: 25667585
Front Microbiol. 2015 Jan 23;6:15. doi: 10.3389/fmicb.2015.00015. eCollection 2015.

Listeria monocytogenes, a food-borne pathogen, has the capacity to maintain intracellular pH (pHi) homeostasis in acidic environments, but the underlying mechanisms remain elusive. Here, we report a simple microplate-based fluorescent method to determine pHi of listerial cells that were...

Synthesis of Optically Active 1,4-Thiazane-3-carboxylic Acid via Optical Resolution by Preferential Crystallization of (RS)-2-Amino-3-[(2-chloroethyl)sulfanyl]propanoic Acid Hydrochloride.

Bioscience, biotechnology, and biochemistry

Shiraiwa T, Tadokoro K, Tanaka H, Nanba K, Yokono N, Shibazaki K, Kubo M, Kurokawa H.
PMID: 27392398
Biosci Biotechnol Biochem. 1998;62(12):2382-7. doi: 10.1271/bbb.62.2382.

Optically active 1,4-thiazane-3-carboxylic acid [TCA] was synthesized from cysteine via optical resolution by preferential crystallization. The intermediate (RS)-2-amino-3-[(2-chloroethyl)sulfanyl]propanoic acid hydrochlo-ride [(RS)-ACS•HCl] was found to exist as a conglomerate based on its melting point, solubility and IR spectrum. (RS)-ACS•HCl was...

Thallium Transfer from Hydrochloric Acid Media into Pure Ionic Liquids.

The journal of physical chemistry. B

Tereshatov EE, Boltoeva MY, Mazan V, Volia MF, Folden CM.
PMID: 26769597
J Phys Chem B. 2016 Mar 10;120(9):2311-22. doi: 10.1021/acs.jpcb.5b08924. Epub 2016 Feb 25.

Pure hydrophobic ionic liquids are known to extract metallic species from aqueous solutions. In this work we have systematically investigated thallium (Tl) extraction from aqueous hydrochloric acid (HCl) solutions into six pure fluorinated ionic liquids, namely imidazolium- and pyrrolidinium-based...

Management of Root Resorption Using Chemical Agents: A Review.

Iranian endodontic journal

Mohammadi Z, C Cehreli Z, Shalavi S, Giardino L, Palazzi F, Asgary S.
PMID: 26843869
Iran Endod J. 2016;11(1):1-7. doi: 10.7508/iej.2016.01.001. Epub 2015 Dec 24.

Root resorption (RR) is defined as the loss of dental hard tissues because of clastic activity inside or outside of tooth the root. In the permanent dentition, RR is a pathologic event; if untreated, it might result in the...

Acceleration of Vaporization, Atomization, and Ionization Efficiencies in Inductively Coupled Plasma by Merging Laser-Ablated Particles with Hydrochloric Acid Gas.

Analytical sciences : the international journal of the Japan Society for Analytical Chemistry

Nakazawa T, Izumo S, Furuta N.
PMID: 27941256
Anal Sci. 2016;32(12):1283-1289. doi: 10.2116/analsci.32.1283.

To accelerate the vaporization, atomization, and ionization efficiencies in laser ablation inductively coupled plasma mass spectrometry, we merged HCl gas with laser-ablated particles before introduction into the plasma, to convert their surface constituents from oxides to lower-melting chlorides. When...

Simple and sensitive determination of trace nitrite in water by zero-crossing first-derivative synchronous fluorescence spectrometry using 6-amino-1,3- naphthalenedisulfonic acid as a new fluorescent probe.

Analytical and bioanalytical chemistry

Cao GP, Yang RY, Zhuang YF, Zuo D, Wang YH.
PMID: 28573318
Anal Bioanal Chem. 2017 Jul;409(19):4637-4646. doi: 10.1007/s00216-017-0409-4. Epub 2017 Jun 02.

A new fluorescent probe, 6-amino-1,3-naphthalenedisulfonic acid (ANDSA), has been developed for the determination of trace nitrite in different waters. This probe is based on the selective reaction of nitrite with ANDSA in hydrochloric acid solution to form the corresponding...

Nitrogen self-doped carbon aerogels derived from trifunctional benzoxazine monomers as ultralight supercapacitor electrodes.

Nanoscale

Zhang M, Chen M, Reddeppa N, Xu D, Jing Q, Zha R.
PMID: 29577146
Nanoscale. 2018 Apr 05;10(14):6549-6557. doi: 10.1039/c8nr00207j.

Ultralight benzoxazine-derived porous nitrogen self-doped carbon aerogels with good yield can be prepared by direct polymerization of trifunctional benzoxazine monomers under acid catalysis using concentrated hydrochloric acid. This allows for a significantly widened density range (0.8-4.5 mg cm-3) and...

Synthesis, inhibition effects and quantum chemical studies of a novel coumarin derivative on the corrosion of mild steel in a hydrochloric acid solution.

Chemistry Central journal

Al-Azawi KF, Al-Baghdadi SB, Mohamed AZ, Al-Amiery AA, Abed TK, Mohammed SA, Kadhum AA, Mohamad AB.
PMID: 27134648
Chem Cent J. 2016 Apr 27;10:23. doi: 10.1186/s13065-016-0170-3. eCollection 2016.

BACKGROUND: The acid corrosion inhibition process of mild steel in 1 M HCl by 4-[(2-amino-1, 3, 4-thiadiazol-5-yl)methoxy]coumarin (ATC), has been investigated using weight loss technique and scanning electron microscopy (SEM). ATC was synthesized, and its chemical structure was elucidated...

Development of a MSFIA system for sequential determination of antimony, arsenic and selenium using hydride generation atomic fluorescence spectrometry.

Talanta

de Santana FA, Portugal LA, Serra AM, Ferrer L, Cerdà V, Ferreira SLC.
PMID: 27260431
Talanta. 2016 Aug 15;156:29-33. doi: 10.1016/j.talanta.2016.04.063. Epub 2016 Apr 30.

This paper proposed a multisyringe flow injection analysis (MSFIA) system for antimony, arsenic and selenium determination in peanut samples by hydride generation atomic fluorescence spectrometry (HG-AFS). The optimization step of the hydride generation was performed using a two-level full...

Showing 1 to 12 of 1684 entries