A Postpartum Death Due to Coronavirus Disease 2019 (COVID-19) in the United States.

BACKGROUND: Limited U.S. reports of pregnant women with coronavirus disease 2019 (COVID-19) infection describe a few critical cases and no maternal mortality. CASE: A 36-year-old patient at 37 weeks of gestation presented with shortness of breath, fever, cough, and sore throat for 1 week. Within 3 hours of admission, she experienced respiratory distress, required intubation, and underwent cesarean delivery and transfer to the intensive care unit. She subsequently decompensated, with multiorgan failure, sepsis, and cardiopulmonary arrest within 36 hours, despite aggressive supportive care and investigational therapies. CONCLUSION: A pregnant patient with COVID-19 infection can experience a rapid onset of critical complications that may prove fatal, despite an indolent presentation. The pathogenesis leading to rapid deterioration is unknown.

Immediate Complications of Elective Newborn Circumcision.

OBJECTIVES: To determine the incidence of immediate complications of elective newborn circumcision in 2 community teaching hospitals. METHODS: We performed a retrospective chart review of all term neonates who had circumcision performed between August 2011 and December 2014 at 2 community hospitals in New York. Neonatal hospital records and subsequent inpatient and outpatient records were reviewed. We classified complications as minor, intermediate, and major. RESULTS: Out of a total of 1115 circumcisions, 1064 met inclusion criteria. There were 41 complications (3.9%), all involving hemorrhage. Sutures were used to control hemorrhage in 3 patients (0.3%). Local pressure or application of hemostatic chemical agents controlled bleeding in the remainder of patients. Bleeding was more common with the use of the Gomco clamp than with the Mogen clamp. Circumcisions performed with Gomco clamp represented 73.2% of the total complications compared with 26.8% with the Mogen clamp. There were no injuries to structures outside the prepuce or problems requiring medical treatment after discharge from the neonatal hospitalization. CONCLUSIONS: The most common immediate complication encountered during an elective neonatal circumcision was bleeding that required only pressure or topical thrombin to achieve hemostasis. Bleeding was more common with the use of the Gomco versus the Mogen clamp. To conclude, our data support the theory that elective infant circumcision can be performed safely in a hospital setting.

Furfural Determination with Disposable Polymer Films and Smartphone-Based Colorimetry for Beer Freshness Assessment.

We have developed disposable color-changing polymeric films for quantification of furfural-a freshness indicator-in beer using a smartphone-based reader. The films are prepared by radical polymerization of 4-vinylaniline, as a furfural-sensitive indicator monomer, 2-hydroxymethyl methacrylate as a comonomer, and ethylene dimethyl methacrylate (EDMA) as a cross-linker. The sensing mechanism is based on the Stenhouse reaction in which aniline and furfural react in acidic media with the generation of a deep red cyanine derivative, absorbing at 537 nm, which is visible to the naked eye. The colorimetric response has been monitored using either a portable fiber-optic spectrophotometer or the built-in camera of a smartphone. Under the optimized conditions, a linear response to furfural in beer was obtained in the 39 to 500 µg L(-1) range, with a detection limit of 12 µg L(-1), thus improving the performance of other well-established colorimetric or chromatographic methods. The novel films are highly selective to furfural, and no cross-reactivity has been observed from other volatile compounds generated during beer aging. A smartphone application (app), developed for Android platforms, measures the RGB color coordinates of the sensing membranes after exposure to the analyte. Following data processing, the signals are converted into concentration values by preloaded calibration curves. The method has been applied to determination of furfural in pale lager beers with different storage times at room temperature. A linear correlation (r > 0.995) between the storage time and the furfural concentration in the samples has been confirmed; our results have been validated by HPLC with diode-array detection.

Molecularly imprinted hydrogels as functional active packaging materials.

This paper describes the synthesis of novel molecularly imprinted hydrogels (MIHs) for the natural antioxidant ferulic acid (FA), and their application as packaging materials to prevent lipid oxidation of butter. A library of MIHs was synthesized using a synthetic surrogate of FA, 3-(4-hydroxy-3-methoxyphenyl)propionic acid (HFA), as template molecule, ethyleneglycol dimethacrylate (EDMA) as cross-linker, and 1-allylpiperazine (1-ALPP) or 2-(dimethylamino)ethyl methacrylate (DMAEMA), in combination with 2-hydroxyethyl methacrylate (HEMA) as functional monomers, at different molar concentrations. The DMAEMA/HEMA-based MIHs showed the greatest FA loading capacity, while the 1-ALLP/HEMA-based polymers exhibited the highest imprinting effect. During cold storage, FA-loaded MIHs protected butter from oxidation and led to TBARs values that were approximately half those of butter stored without protection and 25% less than those recorded for butter covered with hydrogels without FA, potentially extending the shelf life of butter. Active packaging is a new field of application for MIHs with great potential in the food industry.

Active food packaging based on molecularly imprinted polymers: study of the release kinetics of ferulic acid.

A novel active packaging based on molecularly imprinted polymer (MIP) was developed for the controlled release of ferulic acid. The release kinetics of ferulic acid from the active system to food simulants (10, 20, and 50% ethanol (v/v), 3% acetic acid (w/v), and vegetable oil), substitutes (95% ethanol (v/v) and isooctane), and real food samples at different temperatures were studied. The key parameters of the diffusion process were calculated by using a mathematical modeling based on Fick's second law. The ferulic acid release was affected by the temperature as well as the percentage of ethanol of the simulant. The fastest release occurred in 95% ethanol (v/v) at 20 °C. The diffusion coefficients (D) obtained ranged between 1.8 × 10(-11) and 4.2 × 10(-9) cm(2)/s. A very good correlation between experimental and estimated data was obtained, and consequently the model could be used to predict the release of ferulic acid into food simulants and real food samples.

Microbiological transformation of two 15α-hydroxy-ent-kaur-9(11),16-diene derivatives by the fungus Fusarium fujikuroi.

The incubation of 15α-hydroxy-ent-kaur-9(11),16-dien-19-oic acid (15α-hydroxy-grandiflorenic acid) with the fungus Fusarium fujikuroi gave as main metabolite its 3ß,6ß-dihydroxy derivative, which by an oxidative decarboxylation afforded a 19-nor compound with a 4,18-double bond. Other substances obtained were a 3α-hydroxy-19,6α-lactone, 3ß-hydroxy-6ß,7ß-epoxy-ent-kaur-9(11),16-dien-19-oic acid and 3ß-hydroxy-6-oxo-ent-kaur-9(11),16-dien-19-oic acid. Moreover, the biotransformation of 15α,18-dihydroxy-ent-kaur-9(11),16-diene led to the isolation of the corresponding 3ß-, 6ß-, 7α- and 12ß-hydroxy derivatives. Two metabolites formed by 16ß,17-epoxidation of the last compound and of the substrate were also obtained. These results indicated that the presence of the 9,11-double bond in the substrate impedes its 7ß-hydroxylation, which is necessary for the formation of gibberellins and seco-ring B ent-kaurenoids. However, this 9,11-unsaturation does not hinder a 6,7-dehydrogenation and further 6ß,7ß-epoxidation, characteristic steps of the kaurenolide biosynthetic pathway.

Biotransformation of ent-kaur-16-ene and ent-trachylobane 7ß-acetoxy derivatives by the fungus Gibberella fujikuroi (Fusarium fujikuroi).

Candol A (7ß-hydroxy-ent-kaur-16-ene) (6) is efficiently transformed by Gibberella fujikuroi into the gibberellin plant hormones. In this work, the biotransformation of its acetate by this fungus has led to the formation of 7ß-acetoxy-ent-kaur-16-en-19-oic acid (3), whose corresponding alcohol is a short-lived intermediate in the biosynthesis of gibberellins and seco-ring ent-kaurenoids in this fungus. Further biotransformation of this compound led to the hydroxylation of the 3ß-positions to give 7ß-acetoxy-3ß-hydroxy-ent-kaur-16-en-19-oic acid (14), followed by a 2ß- or 18-hydroxylation of this metabolite. The incubation of epicandicandiol 7ß-monoacetate (7ß-acetoxy-18-hydroxy-ent-kaur-16-ene) (10) produces also the 19-hydroxylation to form the 18,19 diol (20), which is oxidized to give the corresponding C-18 or C-19 acids. These results indicated that the presence of a 7ß-acetoxy group does not inhibit the fungal oxidation of C-19 in 7ß-acetoxy-ent-kaur-16-ene, but avoids the ring B contraction that leads to the gibberellins and the 6ß-hydroxylation necessary for the formation of seco-ring B ent-kaurenoids. The biotransformation of 7ß-acetoxy-ent-trachylobane (trachinol acetate) (27) only led to the formation of 7ß-acetoxy-18-hydroxy-ent-trachylobane (33).

Idiopathic muscular hypertrophy of the duodenum.

There have not been any cases published of idiopathic muscular hypertrophy of the gastrointestinal tract in the past 20 years, mainly because it is a very rare condition of unknown aetiology. It is usually asymptomatic and presents mostly in the oesophagus of adult men. Our case involves a 69 year old female that presented with a 6 week history of abdominal discomfort and weight loss. An upper endoscopy showed a blockage at the second portion of the duodenum and the upper gastrointestinal series demonstrated stenosis in the same location. An exploratory laparotomy discovered a mass involving 5 cm of the second portion of the duodenum with wall thickening measuring up to 1.3 cm in thickness. The histological report was muscular hypertrophy with mild eosinophils. This is the first case reported with such a distinctive isolated involvement of the second part of the duodenum.

On the biotransformation of ent-trachylobane to ent-kaur-11-ene diterpenes.

The microbiological transformation of trachinodiol (1) by the fungus Mucor plumbeus afforded the corresponding 1α, 2α, 3α, and 17-hydroxy derivatives (2-4 and 6), respectively. 7ß,16α,18-Trihydroxy-ent-kaur-11-ene (sicanatriol) (5) was also obtained in this feeding. The biotransformation of 1 to give 5 by this fungus may occur by enzymatic abstraction of a hydrogen atom, allylic to the cyclopropane ring, and subsequent cleavage of this ring. This route is similar to that postulated by us in plants of the genus Sideritis, where ent-trachylobane and ent-kaur-11-ene diterpenes coexist. This study confirms that hydroxylation of diterpenes by M. plumbeus occurs preferably at ring A carbons.

Aplicación de slles de tetrazolio de nueva geneación (xtt) para la estimación de la densidad de microorganismos degradadores de hidrocarburos empleando la técnica del número más poobable / Application of the New Generation Tetrazolium Salt (XTT) for the Enumeration of Hydrocarbon Degrading Microorganisms Using the Most Probable Number Method

El presente estudio evaluó el desempeño de dos sales de tetrazolio, una tradicional: INT y una de nueva generación: XTT, para estimar la densidad de microorganismos degradadores de hidrocarburos (HCs) en suelos empleando la técnica del Número Más Probable (NMP). Se analizaron 96 muestras de suelo provenientes de la Ecorregión Cafetera de Colombia. Los microorganismos fueron recuperados en agar mínimo de sales en atmósfera saturada de HCs y la capacidad degradadora fue confirmada por repiques sucesivos utilizando diesel como fuente de carbono. No se observaron diferencias significativas en los recuentos de microorganismos degradadores obtenidos con las dos sales (t de Student, p < 0,05), pero el XTT permitió mejor visualización de los pozos positivos dada la solubilidad del producto reducido, mientras que el INT produjo precipitación, debido al formazán insoluble generado, dificultando su lectura. Se obtuvo un mayor porcentaje de aislamientos empleando XTT (67%), lo cual podría indicar que el tipo de sal es determinante en la viabilidad de estas bacterias. Adicionalmente, se evaluó el límite de detección celular, las condiciones óptimas de concentración de XTT y el tiempo de incubación necesario para la detección de actividad degradadora utilizando la cepa Acinetobacter sp. El aumento en la concentración de XTT de 0,5 mM a 2 mM y el tiempo de incubación tuvieron un efecto inhibitorio y favorable respectivamente, en la recuperación de células viables, adicionalmente, límite de detección de la técnica fue de 10² UFC/ml.

The objective of this study was to evaluate the performance of two tetrazolium indicators: a traditional one: INT and a new generation one: XTT, for the estimation of hydrocarbon (HC) degrading microorganism s density using the Most Probable Number Technique (MPN). Ninety six composite soil samples were taken and analyzed from Ecorregión Cafetera Colombiana. Degrading microorganisms were recovered in minimum salt medium with saturated HC atmosphere. Degrading HC capacity of the microorganisms was confirmed by successive subcultures in the same medium using diesel as only carbon source. Counts obtained with the two salts were not significantly different (Student t test, p < 0,05) but XTT allowed an easier visualization of positive wells due to product solubility of the reduce product. A greater percentage of isolates was obtained using XTT (67%), which suggests that salt type is relevant for recovering of these microorganisms. Additionally, cell detection limit, optimal conditions of XTT concentration and incubation times for detection of activity were evaluated. This evaluation was performed by means of microplate format for hydrocarbon degrading microorganisms using Acinetobacter sp. An inhibitory effect was observed in the recovering of cultivable cells when XTT concentrations increased from 0,5 mM to 2 mM. Incubation time favored this recovering. Detection limit of this technique was established at 10² UFC/ml. Production of the XTT-formazan was positively related with initial cell concentration and negatively with incubation time.

Biotransformation of 7alpha-hydroxy- and 7-oxo-ent-atis-16-ene derivatives by the fungus Gibberella fujikuroi.

The microbiological transformation of 7alpha,19-dihydroxy-ent-atis-16-ene by the fungus Gibberella fujikuroi gave 19-hydroxy-7-oxo-ent-atis-16-ene, 13(R),19-dihydroxy-7-oxo-ent-atis-16-ene, 7alpha,11beta,19-trihydroxy-ent-atis-16-ene and 7alpha,16beta,19-trihydroxy-ent-atis-16-ene, while the incubation of 19-hydroxy-7-oxo-ent-atis-16-ene afforded 13(R),19-dihydroxy-7-oxo-ent-atis-16-ene and 16beta,17-dihydroxy-7-oxo-ent-atisan-19-al. The biotransformation of 7-oxo-ent-atis-16-en-19-oic acid gave 6beta-hydroxy-7-oxo-ent-atis-16-en-19-oic acid, 6beta,16beta,17-trihydroxy-7-oxo-19-nor-ent-atis-4(18)-ene and 3beta,7alpha-dihydroxy-6-oxo-ent-atis-16-en-19-oic acid.