Статті в журналах з теми "Littrow Condition"

Abstract We propose and theoretically and numerically investigate integrated diffraction gratings for the Bloch surface wave (BSW) platform, which have subwavelength or near-subwavelength period. We demonstrate that, in the oblique incidence geometry of a transverse-electric polarized BSW and with a properly chosen band gap configuration of the photonic crystal supporting the surface waves, the proposed structures operate in the scattering-free regime, when the energy of the incident BSW is divided between the reflected and transmitted BSWs with the same polarization corresponding to the propagating diffraction orders of the grating, and not scattered away from the propagation surface. In this regime, the studied integrated gratings support high-Q resonances and bound states in the continuum not only in the subwavelength case when only the specular (zeroth) diffraction orders propagate, but also in the case when non-evanescent zeroth and −1st diffraction orders satisfy the so-called Littrow mounting condition. The proposed integrated gratings on the BSW platform can be used as efficient narrowband spatial or spectral filters operating in reflection, or as BSW beam splitters or deflectors operating in transmission. The obtained results may find application in two-dimensional photonic circuits for steering the BSW propagation.

A traditional flat-panel spectrometer does not allow high-resolution observation and miniaturization simultaneously. In this study, a compact, high-resolution cross-dispersion spectrometer was designed based on the theoretical basis of echelle grating for recording an infrared spectrum. To meet the high-resolution observation and miniaturization design requirements, a reflective immersion grating was used as the primary spectroscopic device. To compress the beam aperture of the imaging system, the order-separation device of the spectrometer adopted toroidal uniform line grating, which had both imaging and dispersion functions in the spectrometer. The aberration balance condition of the toroidal uniform line grating was analyzed based on the optical path difference function of the concave grating, and dispersion characteristics of the immersed grating and thermal design of the infrared lens were discussed based on the echelle grating. An immersion echelle spectrometer optical system consisting of a culmination system, an immersed echelle grating, and a converged system was used. The spectrometer was based on the asymmetrical Czerny-Turner and Littrow mount designs, and it was equipped with a 320 × 256 pixel detector array. The designed wavelength range was 3.7–4.8 μm, the F-number was 4, and the central wavelength resolution was approximately 30,000. An infrared cooling detector was used. The design results showed that, in the operating band range, the root implied that the square diameter of the spectrometer spot diagram was less than 30 μm, the energy was concentrated in a pixel size range, and the spectrometer system design met the requirements.

With the emergence of high-performance infrared detectors and the latest progress in grating manufacturing technology, high-resolution and high-sensitivity infrared spectrometers provide new methods for application to many fields, including astronomy and remote sensing detection. Spectral detection has attracted considerable attention due to its advantages of noncontact and stability. To obtain the detailed features of the missile’s tail flame spectrum, traditional plane reflection gratings are used as the main dispersive element; however, the instrument’s volume will increase with increasing resolution, which is not conducive to remote sensing detection from airborne platforms. Such spectrometers cannot meet high-resolution spectroscopy requirements. To address this problem, this paper proposes an immersion echelle spectrometer combined with a three-mirror astigmatism optical system. High resolution and compact size were achieved. In this paper, a small high-resolution infrared echelle spectrometer optical system was created by combining an off-axis three-mirror anti-astigmatism system, a Littrow structure, and a concave grating Wadsworth imaging device. The optical system operated in the 3.7–4.8 μm band; the echelle grating worked under quasi-Littrow conditions, while the concave grating was used for auxiliary dispersion to separate overlapping orders. The resolution of the optical system in the entire working band was 23,000–45,000. The optical plane size of the spectrometer was around 360 mm × 165 mm. The results show that the Mid-IR echelle spectrometer achieved high spectral resolution, better than 0.25 cm−1, meeting missile tail flame detection requirements. This device has the potential for real-time long-range target detection when warheads are destroyed. While this study focuses on the mid-wave infrared band, its approach can also be extended to other infrared bands.

A Meckel’s diverticulum is a remnant of the vitelline duct, which leads to the formation of a true diverticulum containing all layers of the small intestine. The diverticulum can contain ectopic gastric, duodenal or pancreatic tissue and is the most common congenital anomaly of the gastrointestinal tract with estimates of prevalence ranging from 0.3% to 3%. The condition is usually clinically silent. In children the most common complication is gastrointestinal bleeding caused by ulceration due to the acid secretion by ectopic gastric mucosa.

Allometric equations for estimating above­ and belowground biomass of lodgepole pine have been developed in Alberta, Canada, southeastern British Columbia, southeastern WY, and in Washington and Oregon (Johnstone 1971; Comeau and Kimmins 1989; Pearson et al. 1984; Gholz et al. 1979, respectively). More recently, allometric equations for young lodgepole pine saplings have also been developed in Yellowstone National Park (YNP) for aboveground biomass by Turner et al. (2004), and for belowground biomass by Litton et al. (2003). However, because of variability in latitude, growing conditions, substrate and climate, existing equations that predict biomass for mature lodgepole pine trees are not appropriate for use in the Greater Yellowstone Ecosystem (GYE), and new allometric equations specific for the GYE are needed. In this study, we will develop new allometric equations for predicting above- and belowground biomass in mature lodgepole pine forests of the GYE.

Littré's hernia is the presence of Mekel's diverticulum in the hernial sac. Meckel's diverticulum is the most common birth defect of the digestive tract. It results from the involution of the omphalomesenteric or vitelline duct which normally becomes obliterated around the sixth week of intrauterine life. Although this condition is common, its presence in the hernial sac during the cure of a hernial strangulation is an extremely rare case in our practice. We report a case concerning a 42-year-old sportsman, admitted to the general and visceral surgery department of the Ignace Deen National Hospital for painful, irreducible, non-impulsive and non-expansive right inguino-scrotal swelling on coughing in whom, at the end of the clinical examination the diagnosis of a strangulated right inguino-scrotal hernia was made, he benefited from a surgical management during which the exploration revealed a hernial sac containing hail with a formation oblong on the antemesenteric surface without necrosis with peritoneal fluid. We proceeded to a resection carrying the diverticulum followed by the end-to-end ileal-ileal anastomosis plus the cure of the hernia according to Desarda. The medium-term follow-up with a follow-up of six months did not note any particularity. The diagnosis of this condition is difficult and often arises intraoperatively and the treatment is surgical.

Context. Ellerman bombs (EBs) and UV bursts are small-scale reconnection events that occur in the region of the upper photosphere to the chromosphere. It has recently been discovered that these events can have emission signatures in the He I D3 and He I 10 830 Å lines, suggesting that their temperatures are higher than previously expected. Aims. We aim to explain the line formation of He I D3 and He I 10 830 Å in small-scale reconnection events. Methods. We used a simulated EB in a Bifrost-generated radiative magnetohydrodynamics snapshot. The resulting He I D3 and He I 10 830 Å line intensities were synthesized in 3D using the non-local thermal equilibrium (non-LTE) Multi3D code. The presence of coronal extreme UV (EUV) radiation was included self-consistently. We compared the synthetic helium spectra with observed raster scans of EBs in He I 10 830 Å and He I D3 obtained at the Swedish Solar Telescope with the TRI-Port Polarimetric Echelle-Littrow Spectrograph. Results. Emission in He I D3 and He I 10 830 Å is formed in a thin shell around the EB at a height of ∼0.8 Mm, while the He I D3 absorption is formed above the EB at ∼4 Mm. The height at which the emission is formed corresponds to the lower boundary of the EB, where the temperature increases rapidly from 6 × 103 K to 106 K. The synthetic line profiles at a heliocentric angle of μ = 0.27 are qualitatively similar to the observed profiles at the same μ-angle in dynamics, broadening, and line shape: emission in the wing and absorption in the line core. The opacity in He I D3 and He I 10 830 Å is generated through photoionization-recombination driven by EUV radiation that is locally generated in the EB at temperatures in the range of 2 × 104 − 2 × 106 K and electron densities between 1011 and 1013 cm−3. The synthetic emission signals are a result of coupling to local conditions in a thin shell around the EB, with temperatures between 7 × 103 and 104 K and electron densities ranging from ∼1012 to 1013 cm−3. This shows that both strong non-LTE and thermal processes play a role in the formation of He I D3 and He I 10 830 Å in the synthetic EB/UV burst that we studied. Conclusions. In conclusion, the synthetic He I D3 and He I 10 830 Å emission signatures are an indicator of temperatures of at least 2 × 104 K; in this case, as high as ∼106 K.

Changes in climatic patterns in western North America may modify natural fire regimes, resulting in alterations in forest structure and productivity (Amiro et al. 2000). More frequent fues would create substantial landscape-scale heterogeneity and, consequently, variability in how individual trees and stands allocate biomass in response to the differences in forest structure (Chapin et al. 2002; Turner et al. 2004). For example, in the lodgepole pine (Pinus contorta var. latifolia [Engelm. ex Wats.] Critchfield) forests of the Greater Yellowstone Ecosystem (GYE), recent and historic fires have created a complex mosaic of forest stand structures and aboveground net primary production (NPP) (Turner et al. 1997, 2004). The quantification of forest structure and function at large spatial scales requires accurate measurements of aboveground and belowground tree biomass. Allometric equations for estimating above­ and belowground biomass of lodgepole pine have been developed in Alberta, Canada, southeastern British Columbia, southeastern WY, and in Washington and Oregon (Johnstone 1971; Comeau and Kimmins 1989; Pearson et al. 1984; Gholz et al. (1979, respectively). More recently, allometric equations for young lodgepole pine saplings have also been developed in Yellowstone National Park (YNP) for aboveground biomass by Turner et al. (2004), and for belowground biomass by Litton et al. (2003). However, because of variability in latitude, growing conditions, substrate and climate, existing equations that predict biomass for mature lodgepole pine trees are not appropriate for use in the GYE, and new allometric equations specific for the GYE are needed. In this study, we will develop new allometric equations for predicting above- and belowground biomass in mature lodgepole pine forests of the GYE. The specific objectives of this study were to: (1) develop allometric models for predicting above and belowground biomass of mature lodgepole pine trees in the GYE, and determine how these equations differ with stand density and age; (2) compare and contrast allometric equations developed in this study to allometric equations developed in other locations to determine applicability across geographic loc-ations independent of forest structure.

Abstract Introduction:. Patients with locally advanced triple-negative breast cancer (TNBC) typically receive neoadjuvant therapy (NAT) to downstage the tumor and to improve the outcome of the subsequent breast conservation surgery. A critical unmet need is the lack of a method to accurately predict how a patient with TNBC will respond to NAT before surgery. In this work, we applied a clinical-computational framework to predict response of TNBC early in the course of NAT, by integrating quantitative MRI with mechanism-based mathematical modeling. Methods:. Patients and Data. Multiparametric quantitative MRI was acquired in patients (n = 46) before, and after 2 and 4 cycles of Adriamycin/Cyclophosphamide (A/C) regimen as part of the MD Anderson Cancer Center TNBC Moonshot Program. Within each imaging session, dynamic contrast-enhanced (DCE-), diffusion-weighted imaging (DWI), and a pre-contrast T1-map were acquired. Image processing. The processing pipeline consisted of three components. First, the images within each visit were registered to account for patient motion, and the parametric maps from the DCE and DWI images were computed. Second, inter-visit image registration was achieved by a non-rigid registration applied on breast, with a rigid penalty applied on the tumor region to preserve its size and shape. Third, post-processing was performed for preparation of modeling, including segmentation of the breast contour and tissues, and calculation of voxel-wise cellularity within tumors. Mathematical modeling. A predictive model was developed based on a reaction-diffusion equation (Eq. 1). The mobility of tumor cells is represented by diffusion coupled to mechanical properties of the tissue (Eq. 2), and the proliferation of the tumor is described with logistic growth. The injection and decay of administered therapies, inducing tumor cell death, is also represented in the model (Eq. 3). The variables and parameters used are listed in Table 1. Eq. 1: ∂N(x,t)/∂t = ∇⋅(D(x,t) ∇N(x,t)) + k(x) (1 - N(x,t)/θ)N(x,t) - (λ1(x,t) + λ2(x,t))N(x,t). Eq. 2: D(x,t) = D0 e-γσ(x,t). Eq. 3: λn(x,t) = αne-βn t C(x,t), n = 1, 2. For each patient, the domain and initial condition were generated from the pre-treatment images, and the images acquired during NAT were used for patient-specific calibration of parameters. The calibrated model was then used to predict the response to be observed at the end of NAT. We evaluated the model by comparing its predictions of tumor volume, longest axis, voxel-wise cellularity, and total tumor cellularity to the imaging measurements at the end of A/C. Results:. Our model predicted the tumor volume, total cellularity, and longest axis with a Pearson correlation coefficient (PCC) of 0.85, 0.80, and 0.60, respectively. The accuracy of voxel-wise cellularity achieved a PCC with the median (range) of 0.89 (0.77 - 0.93) between the prediction and the actual measurement. Moreover, we set criteria of 70% shrinkage of tumor volume to define response versus non-response cases, with which our model achieved a differentiation sensitivity/specificity of 0.90/0.73. Discussion:. Preliminary results of our study demonstrate the potential of the clinical-computational framework as a powerful tool for predicting response to NAT. Once validated, the method could also assist in optimizing treatment plans on a patient specific basis, or guiding patient selection in trials for novel NAT regimens. Table 1. Summary of the variables and parameters in the modelQuantitiesDefinition AssignmentDomainsΩbreast tissue domainGenerated from pre-treatment MRITEnd time point of NAT procedureDetermined from NAT schedulexCoordinate in breast tissueAssociated with spatial domain, ΩttimeAssociated with temporal domain, [0, T]VariablesN(x,t)Tumor cell numberInitialized from pre-treatment ADC, computed via Eq. 1D(x,t)Diffusive mobility of tumor cellsComputed via Eq. 2λn(x,t)Death rate induced by nth type of drugComputed via Eq. 3, n = 1 and 2 for A/Cσ(x,t)Von Mises stressComputed from gradient of N(x,t), based on Hormuth et al., 2018C(x,t)Spatiotemporal distribution of drugsAssigned based on NAT schedule and DCE imagesParametersk(x)Proliferation rate of tumor cellsLocally calibratedθTumor cells carry capacityGlobally calibratedαnEfficacy rate of nth type of drugGlobally calibratedβnDecay rate of of nth type of drugGlobally calibratedD0Diffusion coefficient of tumor cells in the absence of mechanical restrictionsGlobally calibratedγStress-tumor cell diffusion coupling constantAssigned based on Hormuth et al., 2018 Citation Format: Chengyue Wu, Angela M. Jarrett, Zijian Zhou, Nabil Elshafeey, Beatriz E. Adrada, Rosalind P. Candelaria, Rania M. Mohamed, Medine Boge, Lei Huo, Jason White, Debu Tripathy, Vicente Valero, Jennifer Litton, Stacy Moulder, Clinton Yam, Jong Bum Son, Jingfei Ma, Gaiane M. Rauch, Thomas E. Yankeelov. Forecasting treatment response to neoadjuvant systemic therapy in triple negative breast cancer viamathematical modeling and quantitative MRI [abstract]. In: Proceedings of the 2021 San Antonio Breast Cancer Symposium; 2021 Dec 7-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2022;82(4 Suppl):Abstract nr P1-08-08.

Purpose. The goal of the study is estimation the scale of the plastic waste’s area in the coastal zone of the Northwestern part of the Black Sea and their role of the of polution formation. Methods. The base of methods is system analyses. Results. The annual volume of solid waste in the North-Western Black Sea region can reach 2.5 million tons per year, and the volume of plastic littre - up to 323 thousand tons per year. In spite of of plastic littre as the resource, at present there is no definite system for handling them, and under these conditions they are disposed of at numerous dumps (including unauthorized ones) of solid household waste. A significant part of plastic (up to 80%) from unorganized landfills and from the other coastal pollution sources is carried out by air and water flows in the water area of the Northwestern part of the Black Sea. Approximatly 83% of marine littre in the Black Sea is plastic. In turn, the presence of marine littre links with the imperfection of the solid waste management system. The dominant way of manage is remains their removal and disposal in landfills. As of 2019, in the Odessa region there were 528 landfills, in the Nikolaev region - 267, in the Kherson region - 54. Almost 17% of landfills in the Odessa region and 26% in the Nikolaev region do not comply according to environmental hazard standards. Significant part of the plastic littre, first of all from unauthorized of the solid waste dumps, is carried by air flows into the river network, and if they are close to the beach area, directly into the Black Sea. Plastic littre is carried out from the catchment areas of the large rivers (Danube, Dniester, Southern Bug and Dnieper), as well as water intakes of numerous medium and small rivers. Almost the whole beach area of the Northwestern part of the Black Sea is actively used for recreational purposes and, therefore, is a source of beach waste. In addition, the coastal sources of garbage can be settlements, marine complexes and agricultural lands located along the coastal line. An insignificant share of plastic littre is generated within the sea area (from shipping, fishing, etc.). Conclusions. The main component of marine littre is plastic, as it accounts for 83% of marine littre founded in the Black Sea. Macroplastics can be subject to long-term movement by the sea currents, winds, waves and poses a direct threat to the marine ecosystem. Directions of movement of marine littre depends on the processes of general circulation in the surface layer (0-500 m) of the Black Sea. The processes of biodegradation of macroplastic are hindered in the marine environment, and therefore its transformation is limited by the processes of destruction and dispersion in micro- and nanoparticles. Taking into consideration the environmental hazard of microplastics, it is advisable to create a system for monitoring in the marine environment. To improve the environmental situation in the coastal zone of the Northwestern part of the Black Sea, it is necessary to significantly increase the volume of recycled plastic littre, as well as to eliminate numerous landfills for solid household waste that do not accord to environmental safety requirements.

Abstract Background Meckel’s diverticulum is the most prevalent congenital anomaly of the gastrointestinal tract with an estimated prevalence ranging from 2% to 4%. The diverticulum is a remnant of the vitelline duct, which leads to the formation of a true diverticulum containing all the layers of the small intestine. The condition is usually clinically silent; however, it can present with unusual symptoms and signs and therefore can result in a delayed diagnosis, particularly in adults. The aim of this study is to review the most recent literature reporting Littre hernias in adults, the diagnostic approach and its subsequent management. This is a literature review, complemented by unusual clinical case of an adult patient who presented with a Littre hernia containing a Meckel’s diverticulum in a strangulated umbilical hernia sac, which required emergency surgery. Method Literature review using Web of science, PubMed and other reliable sources using the possible combinations of the following key words: Meckel’s diverticulum, Littre hernia, umbilical hernia, adults, complications, surgical treatment. Results The herniation of a Meckel’s diverticulum through a potential opening in the abdominal wall is defined as a Littre hernia, representing a rare complication of the diverticula. Due to their rarity, they often remain underdiagnosed, potentially leading to sub-optimal treatment and significant morbidity. Conclusion A Meckel’s diverticulum, despite being a rare clinical entity in adults, can theoretically be found in any hernia, with patients experiencing a wide range of potential complications.

Probiotic properties in vitroof the Saccharomyces boulardii SB2 yeast, was isolated from fruit at Cuc Phuong National Park were evaluated based on biological characteristics and tolerance in simulated intestinal conditions. In the present work, studies were carried out to improve cell growth kinetics to produce cell mass of this biotherapeutic yeast in shake flaskand 30-L bioreactor levels. In case of shake flask, the highest biomass was obtained under the culture conditions as YM medium, at 37oC, pH 6, inoculum concentration of 5 %, with shaking for 32 h; the best sources of carbon and nitrogen were found to be glucose and mixture of peptone, yeast extract, malt extract; cell dry weight and cell density reached 2.43 g L-1 and 109 CFU/ml repetitively. During 30-L bioreactor cultivation, the maximal cell mass in agitation speed of 200 rpm, aeration rate of 1.2 v v-1 min-1; at 32 h of incubation, was 3.58 g L-1 in pH controlled culture and 3.08 g L-1 in uncontrolled pH. This is considered as the first step for cell mass production of this probiotic yeast in industrial scale Keywords: Saccharomyces boulardii SB2, probiotic, biomass, shake flask, 30-L bioreactor. References [1] FAO/WHO, Guidelines for the Evaluation of Probiotics in Food, Joint FAO/WHO Working Group Report on Drafting Guidelines for the Evaluation of Probiotics in Food London, Ontario, Canada, April 30 and May 1, 2002.[2] J. Park, M.H. Floch, Prebiotics, probiotics, and dietary fiber in gastrointestinal disease, Gastroenterology Clinics of North America, 36 (2007) 47-63. https://doi.org/10.1016/j.gtc.2007. 03.001. [3] F. Mansour-Ghanaei, N. Dehbashi, K. Yazdanparast, A Shafaghi, Efficacy of Saccharomyces boulardii with antibiotics in acute amoebiasis, World Journal of Gastroenterology, 9(2003)1832-1833. https:// dx.doi.org/10.3748/ wjg.v9.i8.1832.[4] I. Castagliuolo, M.F. Riegler, L. Valenick, J.T. LaMont, C. Pothoulakis, Saccharomyces boulardii protease inhibits the effects of Clostridium difficile toxins A and B in human colonic mucosa, Infection and Immunity, 67, 1(1999)302-307. [5] A. Qamar, S. Aboudola, M. Warny, P. Michetti, C. Pothoulakis, J.T. LaMont, C.P. Kelly, Saccharomyces boulardii stimulates intestinal immunoglobulin A immune response to Clostridium difficile toxin A in mice, Infection and Immunity, 69 (2001) 2762-2765. https:// doi.org/10.1128/IAI.69.4.2762-2765.2001.[6] T.S. Chin, N.Z. Othman, R. A. Malek, N. Elmarzugi, O. M. Leng, S. Ramli, N. F. Musa, R. Aziz and H. El Enshasy, Bioprocess optimization for biomass production of probiotics yeast Saccharomyces boulardii in semi-industrial scale, Journal of Chemical and Pharmaceutical Research, 7, 3(2015)122-132. [7] D.T.N. Diep, P. George, E. Gorczyca, S. Kasapis, Studies on the viability of Saccharomyces boulardii within microcapsules in relation to the thermomechanical properties of wheyprotein. Food Hydrocolloids, 42 (2014) 232-238. https:// doi.org/10.1016/j.foodhyd.2013.07.024.[8] G.L. Miller, Use of dinitrosalicylic acid reagent for determination of reducing sugar. Analytical Chemistry, 31 (1959) 426-428 https://doi.org/ 10.1021/ac60147a030.[9] H. A. El-Enshasy and A. A. El-Shereef, Optimization of high cell density cultivation of (Probiotic/Biotherapeutic) yeast Saccharomyces boulardii adapted to dryness stress, Deutsche Lebensmittel-Rundschau 104,93(2008)89-394.[10] K. Rajkowska, A. K.-S. Bska and A. Rygala, Probiotic activity of Saccharomyces cerevisiae var.boulardii against human pathogens, Food Technology and Biotechnology, 50, 2 (2012) 230–236. [11] R. Zbinden, E.E. Gonczi, M. Altwegg, Inhibition of Saccharomyces boulardii (nom. inval.) on cell invasion of Salmonella typhimurium and Yersinia enterocolitica, Microbial Ecology in Health and Disease, 11(1999)158–162. https://doi.org/10. 1080/089106099435736.[12] D. Czerucka, T. Piche, P. Rampal, Review article: Yeasts as probiotics – Saccharomyces boulardii, Alimentary Pharmacology Therapeutics, 26(2007)767–778. https://doi.org/10.1111/j.1365 -2036.2007.03442.x.[13] L.V. Mc Farland, P. Bernacoscani, Saccharomyces boulardii. A Review of an Innovative Biotherapeutic Agent, Microbial Ecology in Health and Disease, 6(1993)157-171. https://doi. org/10.3109/08910609309141323.[14] K. Rajkowska and A. Kunicka-Styczynska, Probiotic properties of yeasts isolated from chicken feces and kefirs, Polish Journal of Microbiology, 59,4(2010) 257-263.[15] J.L.R. Fietto R.S. Araujo and F.N. Valadao, Molecular and physiological comparisons between Saccharomy cescerevisiae and Saccharomyces boulardii, Canadian Journal of Microbiology, 50 (2004) 615–621. https://doi. org/10.1139/w04-050.[16] J.L. Muller, K.L. Protti, M.S. Machado, L.L.V. Lacerda, T.M.B. Bresolin, P.S. Podlech, Comparison of Saccharomyces boulardii growth in an air-lift fermentor and in a shaker, Ciência e Tecnologia de Alimentos, 27,4(2007)688-693. http://dx.doi.org/10.1590/S0101-206120070004 00003.

Meckel’s diverticulum is the most common congenital malalignment of the gastrointestinal tract, present in 2-4% of population. It occurs as an embryologic remnant of the vitelline duct. It may have different histological texture. Usually it is diagnosed only during autopsy or intraoperatively. Symptoms such as haemorrhage, inflammation or perforation are possible but very rare. The authors present a case of a patient who received scheduled surgical treatment due to right inguinal hernia. Meckel’s diverticulum was intraoperatively identified in the hernial sac. It was resected and sent for histopathological examination. Before the operation, the patient reported no history of diverticulum and no symptoms. A wedge resection and hernioplasty by Lichtenstein’s method were performed. Hernioplasty with mesh implantation and gastrointestinal tract discontinuity may be associated with a greater risk of infection; therefore prophylactic pre- and post-operative antibiotic therapy was administered. The surgery and the hospitalisation period were uneventful. No symptoms of wound infection were observed, and the healing process was proper. Histopathology findings confirmed the diagnosis of Meckel’s diverticulum. The herniation of a Meckel’s diverticulum – the so-called Littre hernia, is a very rare condition. On average, one case is described every year. In 50% of cases, it is localised in right inguinal hernia, as in the described case. Standard treatment involves diverticulum resection and, depending on the local condition, resection of the adjacent fragment of intestine in some cases.

Paul Ricœur devoted much of his last ten years to studies and analyses of justice and recognition. This paper will trace the indelible bonds between justice and recognition and claim that recognition is a necessary condition for justice and that justice is the telos or goal of recognition. I begin this paper with a review of the multiple meanings of recognition in the two famous French dictionaries, the Littré (1859-1872) and the Le Grand Robert (1985). In his book, The Course of Recognition (2005), Ricoeur groups recognition under three headings, recognition as a form of knowledge or cognition (epistemological), self-recognition, and recognition of the other on the social and judicial level.The complexities of the meanings of “to recognize” and “recognition” are important in their roles in the realm of justice. I include in the concept of justice, the judiciary, both civil and criminal; distributive justice; and, social and political justice. For each one of these, there are multiple meanings of recognition that are important to understanding their foundation and their scope. There are meanings of recognition that are relevant to other aspects of social justice as the recognition of marginal, oppressed, devalued, groups as deserving of being treated as equals. The structure of my paper is to go through the various meanings and categories of meanings of “to recognize” and “recognition.” I give an account of each of the types of justice and show how various kinds of recognition are relevant to each kind of justice.

Background: Edwardsiella tarda has been report as etiology of gastroenteritis in both human and veterinary medicine, usually associated with exposure to aquatic environments in immunocompromised individuals. The present report describes a case of typhlocolitis in a cow in the west region of Santa Catarina state, Brazil. Case: After clinically evaluation of animal and proceeding euthanasia and realized the necropsy. Tissue samples were collected, and routinely processed for histological examination. Histopathological lesions were described as mild, moderate and severe. Tissue and swabs samples of small and large intestine were sent to standard microbiological culture processing. At necropsy, cattle presented severe dehydration and emaciation. Eye and vaginal mucosa were severely congested. The opening of the abdominal cavity revealed a great amount of greenish fluid and a large amount of fecal material, associated with diffuse severe peritonitis, evidenced by hyperemia and severe deposition of fibrin in the visceral and parietal peritoneal surface. In the serosa of the cecum, there were two points of rupture, observed in the proximal colon. The mucosa of cecum and colon were severely edematous, hyperemic, and presented diffusely distributed pinpoint round hemorrhages, as well as fibrinonecrotic material adhered to the surface. Histologically, in the mucosa of cecum and colon, moderate to severe diffuse inflammatory infiltrate of neutrophils, lymphocytes and plasma cells associated with multifocal severe necrosis were observed. Moderate diffuse fibrin deposition was evidenced in the submucosa and muscular, as well as multifocal moderate necrosis in the muscular layer. In the serous, severe diffuse inflammatory infiltrate of neutrophils associated with fibrin deposition and innumerous coccoid bacterial colonies were observed. The samples subjected to bacterial isolation showed growth of Edwardsiella tarda. All samples were negative for Salmonella spp. and Yersinia spp.Discussion: The final diagnosis was established through the association of clinical history, clinical signs, gross and histopathological lesions, as well as, bacterial isolation of the etiological agent, Edwardsiella tarda. In this case, it is conjectured that the reservoirs which cattle had access represented the source of infection. The fact that the animal was in the immediate postpartum period may have predisposed to the development of clinical disease due to immunosuppression. In domestic animals, Edwardsiella tarda has been reported in swine, and as a cause of septicemia in calves. Clinically, intestinal manifestations observed in edwardsiellosis in cattle are indistinguishable from several other conditions that cause diarrhea, such as infectious, nutritional or parasitic diseases. The main differential diagnoses are salmonellosis and yersiniosis due to the similarities regarding to gross and histopathological lesions in these cases compared to cases of edwardsiellosis. Salmonellosis is characterized by grey to yellowish, fetid diarrhea in which blood and mucus are oftentimes observed. At necropsy, catarrhal, hemorrhagic or fibrinous enteritis may be evidenced. The lesions initially are seen in the ileum. However, in the chronic stages of infection, foci of necrosis and ulceration may be noted mainly in the cecum and colon. Histologically, a fibrin layer associated with necrosis and mucosal ulceration can be observed in the small intestine and initial portion of large intestine. Inflammatory infiltrate composed predominantly by neutrophils, as well as fibrin thrombi in capillaries and venules are also observed. Lesions observed are similar that described in ulcerative colitis by E. tarda in human patients. In conclusion, Edwardsiella tarda can lead to a fatal typhlocolitis in cattle, being an important differential diagnosis in cases of acute diarrhea.Arya A.V., Rostom A., Dong W.F. & Flynn A.N. 2011. Crohn’s Disease Exacerbation Induced by Edwardsiella tarda Gastroenteritis. Gastroenterology. 5(3): 623-627.Engel J.J. & Martin T.L. 2006. Edwardsiella tarda as a cause of postdysenteric ulcerative colitis. International Journal Colarectal Disease. 21(2): 184-185.Ewing W.H., McWhorter A.C., Escobar M.R. & Lubin A.H. 1965. Edwardsiella, a new genus of enterobacteriaceae based on a new species, E. tarda. 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