Search Results - "Ramírez, César E."

Coupling trapped ion mobility spectrometry to mass spectrometry: trapped ion mobility spectrometry–time‐of‐flight mass spectrometry versus trapped ion mobility spectrometry–Fourier transform ion cyclotron resonance mass spectrometry by Tose, Lilian V., Benigni, Paolo, Leyva, Dennys, Sundberg, Abigail, Ramírez, César E., Ridgeway, Mark E., Park, Melvin A., Romão, Wanderson, Jaffé, Rudolf, Fernandez‐Lima, Francisco

“…Rationale There is a need for fast, post‐ionization separation during the analysis of complex mixtures. In this study, we evaluate the use of a high‐resolution…”
Get full text

Endocannabinoid signaling in the central nervous system by Martinez Ramirez, César E., Ruiz‐Pérez, Gonzalo, Stollenwerk, Todd M., Behlke, Christina, Doherty, Ashley, Hillard, Cecilia J.

“…It is hard to overestimate the influence of the endocannabinoid signaling (ECS) system on central nervous system (CNS) function. In the 40 years since…”
Get full text

Epoxidation of juvenile hormone was a key innovation improving insect reproductive fitness by Nouzova, Marcela, Edwards, Marten J., Michalkova, Veronika, Ramirez, Cesar E., Ruiz, Marnie, Areiza, Maria, DeGennaro, Matthew, Fernandez-Lima, Francisco, Feyereisen, René, Jindra, Marek, Noriega, Fernando G.

“…Methyl farnesoate (MF) plays hormonal regulatory roles in crustaceans. An epoxidated form of MF, known as juvenile hormone (JH), controls metamorphosis and…”
Get full text

Common structural features facilitate the simultaneous identification and quantification of the five most common juvenile hormones by liquid chromatography-tandem mass spectrometry by Ramirez, Cesar E., Nouzova, Marcela, Michalkova, Veronika, Fernandez-Lima, Francisco, Noriega, Fernando G.

“…This study reports the development and application of a liquid chromatography method coupled to electrospray tandem mass spectrometry (LC-MS/MS) for the…”
Get full text

Sexual dimorphism of diapause regulation in the hemipteran bug Pyrrhocoris apterus by Hejníková, Markéta, Nouzova, Marcela, Ramirez, Cesar E., Fernandez-Lima, Francisco, Noriega, Fernando Gabriel, Doležel, David

“…Diapause is one of the major strategies for insects to prepare for and survive harsh seasons. In females, the absence of juvenile hormone (JH) is a hallmark of…”
Get full text

The juvenile hormone described in Rhodnius prolixus by Wigglesworth is juvenile hormone III skipped bisepoxide by Villalobos-Sambucaro, Maria Jose, Nouzova, Marcela, Ramirez, Cesar E., Eugenia Alzugaray, María, Fernandez-Lima, Francisco, Ronderos, Jorge Rafael, Noriega, Fernando G.

“…Juvenile hormones (JHs) are sesquiterpenoids synthesized by the corpora allata (CA). They play critical roles during insect development and reproduction. The…”
Get full text

Fully automated trace level determination of parent and alkylated PAHs in environmental waters by online SPE-LC-APPI-MS/MS by Ramirez, Cesar E., Wang, Chengtao, Gardinali, Piero R.

“…Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous compounds that enter the environment from natural and anthropogenic sources, often used as markers to…”
Get full text

Comprehensive Screening of Polycyclic Aromatic Hydrocarbons and Similar Compounds Using GC–APLI–TIMS–TOFMS/GC–EI–MS by Olanrewaju, Clement A, Ramirez, Cesar E, Fernandez-Lima, Francisco

“…In the present work, a novel workflow based on complementary gas-phase separations for the identification of isomeric PAHs from complex mixtures is described…”
Get full text

Effective Liquid Chromatography–Trapped Ion Mobility Spectrometry–Mass Spectrometry Separation of Isomeric Lipid Species by Jeanne Dit Fouque, Kevin, Ramirez, Cesar E, Lewis, Russell L, Koelmel, Jeremy P, Garrett, Timothy J, Yost, Richard A, Fernandez-Lima, Francisco

“…Lipids are a major class of molecules that play key roles in different biological processes. Understanding their biological roles and mechanisms remains…”
Get full text

Characterization of Deasphalted Crude Oils Using Gas Chromatography–Atmospheric Pressure Laser Ionization–Trapped Ion Mobility Spectrometry–Time-of-Flight Mass Spectrometry by Olanrewaju, Clement A, Ramirez, Cesar E, Fernandez-Lima, Francisco

“…In the present work, a novel workflow based on complementary gas-phase separations is applied to the characterization of deasphalted light (Macondo and…”
Get full text

Analysis of drugs of abuse by online SPE-LC high resolution mass spectrometry: communal assessment of consumption by Heuett, Nubia V, Ramirez, Cesar E, Fernandez, Adolfo, Gardinali, Piero R

“…An online SPE-LC-HRMS method was developed to monitor the consumption of 18 drugs of abuse (DOAs) including amphetamines, opioids, cocainics, cannabinoids,…”
Get full text

Coupling Stable Isotope Labeling and Liquid Chromatography-Trapped Ion Mobility Spectrometry-Time-of-Flight-Tandem Mass Spectrometry for De Novo Mosquito Ovarian Lipid Studies by Tose, Lilian V, Ramirez, Cesar E, Michalkova, Veronika, Nouzova, Marcela, Noriega, Fernando G, Fernandez-Lima, Francisco

“…There is a need to better understand lipid metabolism during mosquito ovarian development. Lipids are the major source of energy supporting ovarian follicles…”
Get full text

Towards Discovery and Targeted Peptide Biomarker Detection Using nanoESI-TIMS-TOF MS by Garabedian, Alyssa, Benigni, Paolo, Ramirez, Cesar E., Baker, Erin S., Liu, Tao, Smith, Richard D., Fernandez-Lima, Francisco

“…In the present work, the potential of trapped ion mobility spectrometry coupled to TOF mass spectrometry (TIMS-TOF MS) for discovery and targeted monitoring of…”
Get full text

Analysis of isomeric opioids in urine using LC-TIMS-TOF MS by Adams, Kendra J., Ramirez, Cesar E., Smith, Natalie F., Muñoz-Muñoz, Ana Celia, Andrade, Lawrence, Fernandez-Lima, Francisco

“…In the present work, a fast separation, identification and quantification workflow based on liquid chromatography coupled to trapped ion mobility in tandem…”
Get full text

A simple method for routine monitoring of glyphosate and its main metabolite in surface waters using lyophilization and LC-FLD+MS/MS. Case study: canals with influence on Biscayne National Park by Ramirez, Cesar E., Bellmund, Sarah, Gardinali, Piero R.

“…A novel method was developed for the analysis of the herbicide glyphosate and its main metabolite aminomethylphosphonic acid (AMPA) based on lyophilization…”
Get full text

Inhibition of juvenile hormone synthesis in mosquitoes by the methylation inhibitor 3-deazaneplanocin A (DZNep) by Nouzova, Marcela, Michalkova, Veronika, Ramirez, Cesar E., Fernandez-Lima, Francisco, Noriega, Fernando G.

“…Juvenile hormone (JH), synthesized by the corpora allata (CA), controls development and reproduction in mosquitoes through its action on thousands of…”
Get full text

Discovery and targeted monitoring of polychlorinated biphenyl metabolites in blood plasma using LC-TIMS-TOF MS by Adams, Kendra J., Smith, Natalie F., Ramirez, Cesar E., Fernandez-Lima, Francisco

“…[Display omitted] •Experimental CCSs and candidate structures of penta-, hexa- and hepta-OH-PCBs.•Discovery and targeted monitoring based on LC-TIMS-TOF…”
Get full text

Fractionation of Dissolved Organic Matter by Co-Precipitation with Iron: Effects of Composition by Du, Yingxun, Ramirez, Cesar E., Jaffé, Rudolf

“…Interactions between dissolved organic matter (DOM) and different physical-chemical forms of iron (Fe) represent important biogeochemical processes in the…”
Get full text

Juvenile hormone controls ovarian development in female Anopheles albimanus mosquitoes by Hernández-Martínez, Salvador, Cardoso-Jaime, Víctor, Nouzova, Marcela, Michalkova, Veronika, Ramirez, Cesar E., Fernandez-Lima, Francisco, Noriega, Fernando G.

“…Anophelinae mosquitoes are vectors of human malaria, a disease that infects hundreds of millions of people and causes almost 600,000 fatalities annually…”
Get full text

Fast, ultra-trace detection of juvenile hormone III from mosquitoes using mass spectrometry by Ramirez, Cesar E., Nouzova, Marcela, Benigni, Paolo, Quirke, J. Martin E., Noriega, Fernando G., Fernandez-Lima, Francisco

“…In the present work, a new protocol for fast separation and quantification of JH III from biological samples using liquid chromatography coupled to…”
Get full text