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HR, Hr or hr may refer to: ==Science, technology and engineering== * HR (gene) (Hairless homolog (mouse)), a gene which encodes a protein whose function has been linked to hair growth * HR (software), a program that automatically forms mathematical theories by searching for sequences of numbers * Haemodynamic response, rapid delivery of blood to active neuronal tissues * Half Rate (HR or GSM-HR), a speech coding system for GSM developed in the early 1990s * Hazard ratio, the effect of an explanatory variable on the hazard or risk of an event * Heart rate (HR), a measure of the number of heart beats per minute (bpm) * Hertzsprung–Russell diagram (H-R diagram or HRD, also known as a colour-magnitude diagram or CMD), used in understanding stellar evolution in astronomy and astrophysics * High-Resolution High-Definition (HRHD, HR, HRHDTV or HR.HDTV), referring to an image resolution derived from high-definition video * Homologous recombination, in genetics, the process in which genetic material is exchanged between two similar or identical strands of DNA * Hypersensitive response, a mechanism used by plants to prevent the spread of infection by microbial pathogens * Hydroxyethylrutoside, a class of drugs * Hayati-Roberts link frame convention (HR), a robotics convention for representation of coordinates * <hr/>, an HTML element that creates a 'horizontal rule' or dividing line* Abbreviation for hour * Star catalogue symbol standing for Harvard observatory, Revised photometry 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「HR」の詳細全文を読む スポンサード リンク
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