M. Crespín

Publications9
h-index4
Citations157
Highly Influential Citations6
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Study of the degradation of the herbicides 2,4-D and MCPA at different depths in contaminated agricultural soil.
Two phenoxyacid herbicides (2,4-D and MCPA) and their six corresponding phenols were determined in soil by using gas chomatography with electron impact mass spectrometry (GC/MS) for… Expand
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Solid-phase extraction method for the determination of free and conjugated phenol compounds in human urine.
A rapid flow system for automatic sample conditioning for the determination of phenol compounds in human urine has been developed and optimised. Free phenols are detected directly in urine samples… Expand
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Discrimination of structural isomers of chlorinated phenols in waters using gas chromatography-mass spectrometry in the negative chemical ionization mode.
The analysis and identification of structural isomers of mono-, di- and trichlorophenols is reported. The fragmentation of the phenols was examined by GC-MS in both electron impact (EI) and negative… Expand
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Automatic preconcentration of chlorophenols and gas chromatographic determination with electron capture detection
SummaryA solid-phase extraction system coupled to a gas chromatograph fitted with an electron capture detector was developed for the determination of chlorophenols in waters. The continuous system… Expand
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Pneumatic telegraphs for long distances: Paper read at the Meeting of the Society of Civil Engineers of Paris, on the 4th of June, 1876
COLLECTIVE AND COMPONENT CONSTITUENCIES: SPILLOVER FROM HIGH PROFILE STATEWIDE RACES INTO RACES FOR THE HOUSE OF REPRESENTATIVES by GREGORY
PROFILE STATEWIDE RACES INTO RACES FOR THE HOUSE OF REPRESENTATIVES by GREGORY J. WOLF (Under the Direction of Jamie L. Carson) ABSTRACT It is widely known that turnout is substantially lower during… Expand
Intercalation of Nitrogen Compounds Between the [Fe0.5Nb1.5O5]− Sheets of a Protonic Ferriniobate
Procedimiento excisional electroquirúrgico con asa diatérmica para el tratamiento de la neoplasia intraepitelial cervical
Objetivo: evaluar la excision de la zona dr transformacion con ASA (EZTA), en nuestras manos. Poblacion y metodo: un total de 407 pacientes con citologia anormal, a las que se les practico EZTA… Expand
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Detection of High Oncogenic Risk Human Papilloma Virus With CareHPV Test in Women Attended in Health Units in Copán Honduras
Background and context: Persistent infection with high-risk human papilloma virus (HR-HPV) is identified as the main cause of premalignant and malignant cervical diseases. The identification of… Expand