Papers by Ricardo E Caicedo
Revista Colombiana de Entomología
Pimeliaphilus triatomae es un ectoparásito considerado entomopatógeno de Triatominos; sin embargo... more Pimeliaphilus triatomae es un ectoparásito considerado entomopatógeno de Triatominos; sin embargo, hasta el momento no existe evidencia de la mortalidad y de la acción que éste ejerce sobre sus víctimas. Por este motivo se comparó el efecto del parasitismo sobre los cinco ínstares ninfales y adultos, así como de los huevos ovipositados por éstos. Se observó el ciclo de vida del ácaro durante su actividad parasitaria y los resultados obtenidos indican una disminución de la oviposición y un prolongación en el ciclo de vida de los insectos infestados con un X = de 456 días. Tombién se obtuvo una mortalidad alta en los ínstares ninfales, en los cuales se observó la rotura de la epicutícula y la muerte por vaciado estomacal, después de mantener una carga parasitaria alta. Al comparar los individuos infestados con cada grupo control se hallaron en las variables de estudio, mortalidad, oviposición y víabuidad de los huevos, diferencias significativas para un a = 0,05.
Properties and Clinical Applications, 2014
SPE EUROPEC/EAGE Annual Conference and Exhibition, 2011
The Faseb Journal, Mar 1, 2006
The Faseb Journal, Mar 1, 2006
Japanese poultry science, 1997
JAPANESE …, 1997
The purpose of this study was to assess and compare the steroidogenic response to
General dentistry
This study examined how root canal irrigation with sodium hypochlorite and citric acid affected c... more This study examined how root canal irrigation with sodium hypochlorite and citric acid affected calcium diffusion, using a calcium hydroxide-based sealer and a zinc oxide eugenol-based sealer with little calcium hydroxide. Sixty-eight single-rooted, freshly extracted teeth were decrowned to 14 mm, instrumented using a crown down technique, and divided into two groups: the experimental group (irrigated with 5.25% NaOCl followed by 10% citric acid) and the control (irrigated with 5.25% NaOCl only). Both groups were divided into two subgroups, depending on the type of sealers used in obturation with gutta-percha. Coronal and apical openings were sealed and teeth were placed in water (37 degrees C). Spectrophotometry was used to measure the amount of calcium released in water through radicular dentin. For each sealer, the calcium diffused from the experimental group was significantly higher than that of the control group (p < 0.05).
General dentistry
This article describes a technique using ParaPost Tenax Fiber White, ParaPost Cement, and ParaPos... more This article describes a technique using ParaPost Tenax Fiber White, ParaPost Cement, and ParaPost ParaCore build-up material to restore a tooth with a significant loss of tooth structure. After successful root canal therapy, the posts were bonded in the canals and the core was built using ParaPost ParaCore build-up material. At that point, the tooth was prepared to receive a conventional porcelain-fused-to-metal crown.
Journal of endodontics, 2005
This study characterized the interactions of mineral trioxide aggregate with a synthetic tissue f... more This study characterized the interactions of mineral trioxide aggregate with a synthetic tissue fluid composed of a neutral phosphate buffer saline solution and root canal dentin in extracted human teeth using inductively coupled plasma-atomic emission spectroscopy, scanning electron microscopy, energy dispersive X-ray analysis, and X-ray diffraction. Mineral trioxide aggregate exposed to synthetic tissue fluid at 37 degrees C released its metallic constituents and produced precipitates with a composition and structure similar to that of hydroxyapatite [Ca10(PO4)6(OH)2-HA]. Endodontically prepared teeth filled with mineral trioxide aggregate and stored in synthetic tissue fluid at 37 degrees C for 2 months produced at the dentin wall an adherent interfacial layer that resembled hydroxyapatite in composition. The authors conclude that Ca, the dominant ion released from mineral trioxide aggregate, reacts with phosphates in synthetic tissue fluid, yielding hydroxyapatite. The dentin-mi...
International Journal of Oral-Medical Sciences, 2004
... RadicularDentin Ricardo Caicedo, Donald E Mercante, and Dominick J Alongi Department ... USA ... more ... RadicularDentin Ricardo Caicedo, Donald E Mercante, and Dominick J Alongi Department ... USA Correspondence to : Ricardo Caicedo E-mail:rcaice＠lsuhsc.edu Keywords : calcium hydroxide,calcium-ion diffusion,spectrophotometry ...
The Journal of nutrition, 2005
Certain probiotic bacteria show anti-inflammatory activity after being heat killed, whereas other... more Certain probiotic bacteria show anti-inflammatory activity after being heat killed, whereas others do not, suggesting that the gastrointestinal environment may alter the activity of probiotic bacteria. Occasionally, probiotics are provided when a patient is also being treated with oral antibiotics; this may have an effect on the probiotic activity. We hypothesized that Lactobacillus rhamnosus GG (LGG) are capable of downregulating tumor necrosis factor-alpha (TNFalpha)-induced interleukin (IL)-8 production under all 3 of these conditions, and that LGG act through the nuclear factor kappaB (NFkappaB)/inhibitor of kappaB (IkappaB) pathway. Caco-2 cells were treated with live or heat-killed LGG in doses ranging from 10(4) to 10(10) cfu/L, in the presence or absence of antibiotics and TNFalpha in the media. TNFalpha-induced production of IL-8 by Caco-2 cells was modulated by LGG under all 3 conditions. However, higher doses of live LGG without TNFalpha in the presence or absence of anti...
Journal of Endodontics, 1997
Journal of Endodontics, Volume 23, Issue 4, Pages 267, April 1997, Authors:RicardoCaicedo, Dr. Od... more Journal of Endodontics, Volume 23, Issue 4, Pages 267, April 1997, Authors:RicardoCaicedo, Dr. Odont; M. Alarcon, DDS; H. Becerra, DDS. ... Ricardo Caicedo, Dr. Odont ,; M. Alarcon, DDS ,; H. Becerra, DDS. PDF. No abstract is available. ...
SPE EUROPEC/EAGE Annual Conference and Exhibition, 2011
Pediatric Research, 2008
Neonatal diet may influence the development of type 1 diabetes (T1D) in susceptible individuals t... more Neonatal diet may influence the development of type 1 diabetes (T1D) in susceptible individuals through an intestinal mucosal inflammatory response, resulting in loss of self-tolerance. We tested the hypothesis that formula feeding during the neonatal period accelerates the development of T1D in diabetes-prone BioBreeding (BBDP) rats through regulation of CD4+CD25+ regulatory T lymphocytes (T(reg)) and anti-inflammatory cytokines. BBDP rat pups fed rat milk substitute (RMS) via a &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;quot;pup-in-the cup&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;quot; system were compared with mother-fed (MF) rats. The spleen and thymus were analyzed for Foxp3-expressing CD4+/CD25+ T cells. Multiplex enzyme-linked immunosorbent assays (ELISAs) were performed to measure cytokine-induced neutrophil chemoattractant (CINC), tumor necrosis factor alpha (TNF-alpha), interferon-gamma (IFN-gamma), interleukin (IL)-4, IL-10, and IL-18. Diabetes-free survival, time of disease onset, and T(reg)/total T lymphocyte ratios were not different. MF pups had higher ileal CINC (p &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; 0.001) and IL-18 (p = 0.002), but no differences in the liver. There were no differences in ileal cytokine concentrations of 75-d-old rats, but the formula-fed rats had greater liver TNF-alpha (p &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; 0.001), IFN-gamma, and IL-4 (p &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; 0.01) and lower IL-10 (p = 0.002) compared with MF animals. Formula versus maternal milk altered the hepatic cytokine profile at 75 d toward an inflammatory pattern but did not result in altered T(reg) cell frequencies or the development of T1D.
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Papers by Ricardo E Caicedo