WordNet

partially or to the extent of a half; "he was half hidden by the bushes"
one of two divisions into which some games or performances are divided: the two divisions are separated by an interval
(of siblings) related through one parent only; "a half brother"; "half sister"
consisting of one of two equivalent parts in value or quantity; "a half chicken"; "lasted a half hour"
partial; "gave me a half smile"; "he did only a half job"
small room in which a monk or nun lives (同)cubicle
a device that delivers an electric current as the result of a chemical reaction (同)electric cell
a room where a prisoner is kept (同)jail cell, prison cell
(biology) the basic structural and functional unit of all organisms; they may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals
any small compartment; "the cells of a honeycomb"
a small unit serving as part of or as the nucleus of a larger political movement (同)cadre

PrepTutorEJDIC

〈C〉〈U〉『半分』,2分の1;約半分 / 〈U〉《時刻を表す数詞と共に用いて》『半』,30分 / 〈C〉《おもに英》(2学期制の学校での)前(後)期 / 〈C〉(競技などの)前(後)半;(野球で1イニングの)表(裏) / 〈C〉=halfback / 『半分の』 / 不十分な,中途はんぱな / 『半ば』,半分[だけ] / 半時間だけ,30分だけ / 不完全に / かなり,ほとんど
(刑務所の)『独房』;(修道院の)小さい独居室 / (ミツバチの)みつ房,巣穴 / 小さい部屋 / 『細胞』 / 電池 / 花粉室 / (共産党などの)細胞
おや,はああ,ああ(驚き・喜び・疑い・ためらいなどを表す声)
hectare; hectares

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/06/28 03:05:15」(JST)

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[Wiki en表示]

A half-cell is a structure that contains a conductive electrode and a surrounding conductive electrolyte separated by a naturally occurring Helmholtz double layer. Chemical reactions within this layer momentarily pump electric charges between the electrode and the electrolyte, resulting in a potential difference between the electrode and the electrolyte. The typical anode reaction involves a metal atom in the electrode dissolved and transported as a positive ion across the double layer, causing the electrolyte to acquire a net positive charge while the electrode acquires a net negative charge. The growing potential difference creates an intense electric field within the double layer, and the potential rises in value until the field halts the net charge-pumping reactions. This self-limiting action occurs almost instantly in an isolated half-cell; in applications two dissimilar half-cells are appropriately connected to constitute a Galvanic cell.

A standard half-cell, used in electrochemistry, consists of a metal electrode in a 1 molar (1 mol/L) aqueous solution of the metal's salt, at 298 kelvin (25 °C).^[1] The electrochemical series, which consists of standard electrode potentials and is closely related to the reactivity series, was generated by measuring the difference in potential between the metal half-cell in a circuit with a standard hydrogen half-cell, connected by a salt bridge.

The standard hydrogen half-cell:

2H⁺(aq) + 2e^- → H₂(g)

The half-cells of a Daniell cell:

Original equation

Zn + Cu²⁺ → Zn²⁺ + Cu

Half-cell (anode) of Zn

Zn → Zn²⁺ + 2e⁻

Half-cell (cathode) of Cu

Cu²⁺ + 2e⁻ → Cu

References

^ Andrews, Donald H.; Richard J. Kokes (1962). "Electrochemistry". Fundamental Chemistry. New York: John Wiley & Sons, Inc. p. 482.

This article about analytical chemistry is a stub. You can help Wikipedia by expanding it.

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Sputum analysis: Non-invasive early lung cancer detection.

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Ultra-sensitive conductometric detection of heavy metals based on inhibition of alkaline phosphatase activity from Arthrospira platensis.

Tekaya N, Saiapina O, Ben Ouada H, Lagarde F, Ben Ouada H, Jaffrezic-Renault N.SourceUniversity Lyon, Institut des Sciences Analytiques, CNRS/ENS/UCBL UMR 5280, Villeurbanne, France. tekayanadeje@yahoo.fr
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Intracellular delivery and antitumor effects of pH-sensitive liposomes based on zwitterionic oligopeptide lipids.

Mo R, Sun Q, Li N, Zhang C.SourceCenter of Drug Discovery, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China.
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PMID 23352118

Japanese Journal

Sunitinibによる間質性肺疾患の1例

関口善吉,滝沢明利,竹島徹平 [他]
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… Histological examination revealed the presence of clear cell-type, G3, pT3b renal cell carcinoma. … We administered half of the previous dose of sunitinib 2 weeks after cessation of sunitinib therapy for complete resolution of the lung metastases. …
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Innovative antimicrobial coating of titanium implants with iodine

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… A solid-state half-cell structure with a Sn--Li2O composite (SLC) anode/LiPON/Li was prepared to improve upon the cycling stability at the second discharging cycle of the non-Li anode thin films for all-solid-state batteries. … Based on the cycling behaviors of the all-solid half cell with SLC and pure Sn thin film electrodes at first and second discharging cycles, cycling stability at the initial charging--discharging cycle of the all-solid-state battery system was improved. …
NAID 150000103787