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Search Results: 1 - 10 of 124 matches for " Kalina Alipieva "
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GC-MS studies of the chemical composition of two inedible mushrooms of the genus Agaricus
Assya Petrova, Kalina Alipieva, Emanuela Kostadinova, Daniela Antonova, Maria Lacheva, Melania Gjosheva, Simeon Popov, Vassya Bankova
Chemistry Central Journal , 2007, DOI: 10.1186/1752-153x-1-33
Abstract: Our GC-MS studies on the volatile fractions and butanol extracts resulted in the identification of 44 and 34 compounds for A. placomyces and A. pseudopratensis, respectively, including fatty acids and their esters, amino acids, and sugar alcohols. The most abundant constituent in the volatiles and butanol were phenol and urea respectively. We also identified the presence of ergosterol and two Δ7-sterols. In addition, 5α,8α-Epidioxi-24(ξ)-methylcholesta-6,22-diene-3β-ol was isolated for the first time from both mushrooms. Our study is therefore the first report on the chemical composition of these two species.The results obtained contribute to the knowledge of the chemical composition of mushrooms belonging to the Agaricus genus, and provide some explanation for the reported mild toxicity of A. placomyces and A. pseudopratensis, a phenonomenon that can be explained by a high phenol content, similar to that found in other Xanthodermatei species.Mushrooms in the genus Agaricus have a worldwide distribution, with up to 90 species recorded in Europe. The genus includes the most economically important and commercially cultivated mushroom in the world, A. bisporus (button mushroom) as well as many other edible species [1]. Some Agaricus species are inedible, including A. placomyces and A. pseudopratensis Bohus, which are similar in appearance to certain edible species, yet are known to possess unpleasant odours and result in gastrointestinal problems if consumed [2,3]. To the best of our knowledge, there is no information available in the literature concerning the chemical composition of these two species.In this article, we report the results of the GC-MS analyses of volatile and polar compounds, in addition to the sterol fraction obtained from the fruiting bodies of A. placomyces and A. pseudopratensis. The results can help characterise the species investigated, indicate the presence of some biologically active compounds and shed light upon their reported mild toxicity.T
Enlarged cauda equina nerve roots in Cerebrotendinous Xanthomatosis  [PDF]
Peter Kalina
Open Journal of Clinical Diagnostics (OJCD) , 2011, DOI: 10.4236/ojcd.2011.13006
Abstract: CXT is a rare inherited autosomal recessive lipid storage disease due to the impaired metabolic pathway of cholesterol secondary to a deficiency in 27- sterol hydroxylase, an enzyme in the synthesis of chenodeoxycholic acid (CDCA), a primary bile acid. Abnormal bile acid synthesis leads to elevated plasma Cholestanol (a derivative of cholesterol) accumulation, especially in the lens, central nervous system (CNS) and tendons.
Spinal Cord Compression by Thoracic Vertebral Hemangioma—A Case Report  [PDF]
Peter Kalina
Open Journal of Medical Imaging (OJMI) , 2012, DOI: 10.4236/ojmi.2012.21005
Abstract: A 68 year old with lower extremity numbness, vibratory sensation loss, coldness and burning of his feet, unsteady gait, frequent falls and a sensory level had an MRI demonstrating aT7 and T8 vertebral body/posterior element lesion with epidural extension, cord compression and foraminal extension (Figures 1-5). Decompressive laminectomy/resection confirmed vertebral hemangioma, a common benign neoplasm that typically remains asymptomatic, found incidentally in 10% of the population. Progressive vertebral body hemangiomas may cause cord or nerve root compression due to epidural tumor extension, expanded bone, hematoma or fracture. Radiographs demonstrate course vertical striations caused by thick trabeculae. CT in indolent lesions demonstrates fat density while compressive lesions demonstrate soft tissue density. Indolent lesions follow fat signal on MRI; symptomatic lesions are T1 isointense/T2 hyperintense. Work-up for aggressive hemangiomas includes angiography to determine vascularity, identify feeding/draining vessels and identify blood supply to the cord. Biopsy helps differentiate hemangioma, lymphoma, myeloma or metastasis. Management of symptomatic hemangiomas includes vertebroplasty for pain, radiation for pain, compression or pre-op and decompressive laminectomy for epidural disease. Embolization of feeding vessels may be performed pre-op or may be curative. Hemangioma causing cord compression and neurologic symptoms by extraosseous extension is much less common than benign hemangioma. Imaging features may suggest potential for progression.
Cavernous Hemangioma of the Nasal Cavity  [PDF]
Peter Kalina, Jeffrey Rykken
Open Journal of Medical Imaging (OJMI) , 2011, DOI: 10.4236/ojmi.2011.12007
Abstract: A 22 year old six month pregnant female presented with right eye tearing, proptosis and nasal congestion. CT revealed a large right nasal cavity mass with involvement of the ethmoids, right maxillary sinus, lamina papyracea, cribriform plate and nasal septum. There was significant remodeling of the right cribriform plate with mild extra-axial intracranial and mild intraorbital extension. Transnasal endoscopic excision confirming the diagnosis of cavernous hemangioma of the nasal cavity. Hemangiomas are benign slow-growing vascular neoplasms classified as capillary, cavernous or mixed. Hemangiomas of the nasal cavity and paranasal sinuses are very rare with only a few reported cases. The occurrence and growth of these lesions during pregnancy may be related to increased blood volume or hormonal factors. The most common therapeutic option is complete surgical resection via transnasal endoscopic approach. Pre-operative embolization may be utilized in some cases to decrease the risk of intraoperative bleeding.
Early Initial Diagnosis of Gardner Syndrome in a 12-Year-Old Boy  [PDF]
Erich Bryan, Peter Kalina
Advances in Computed Tomography (ACT) , 2013, DOI: 10.4236/act.2013.21001

A 12-year-old boy presented to his primary care physician with a painful lump at the angle of the left mandible after being kicked in the jaw during a soccer game. Over the next 2 months the lesion became progressively firmer and fine needle aspiration was attempted. Results were non-diagnostic. Panorex examination revealed a calcified mass contiguous with the left angle of the mandible. Considerations were bony callus secondary to trauma versus a calcified hematoma. A maxillofacial CT showed multiple diffuse craniofacial osseous lesions including the clinically suspected region at the left angle of the mandible. Imaging findings were consistent with multiple craniofacial osteomas and workup for Gardner Syndrome was initiated. Genetic testing was subsequently positive for Familial Adenomatous Polyposis.

Cobb Syndrome: A Case Report with Review of Clinical and Imaging Findings  [PDF]
Alok Bhatt, Peter Kalina
Open Journal of Clinical Diagnostics (OJCD) , 2014, DOI: 10.4236/ojcd.2014.44033
Abstract: Cobb syndrome is a rare entity characterized by cutaneous vascular lesions and arteriovenous malformations in the spine, both in the same metamere. This syndrome is also known as cutaneous vertebral medullary angiomatosis, cutaneomeningospinal angiomatosis, and spinal arterial metameric disorder. We report the case of a male infant diagnosed with Cobb syndrome who was treated surgically. The presence of a cutaneous vascular lesion in this patient prompted subsequent imaging for spinal angioma or AVM in the same dermatome. Early recognition in this patient was shown to be life-changing, as patients with Cobb syndrome who have undergone early intervention have shown to be without neurologic deficit or have a halt in progression of symptoms.
Atypical Cystic Parotid Gland Acinic Cell Carcinoma in a Child  [PDF]
Noah N. Chasen, Peter Kalina
Advances in Computed Tomography (ACT) , 2013, DOI: 10.4236/act.2013.22010
Abstract: Purpose: To describe the extremely rare occurrence of acinic cell carcinoma of the parotid in a young child. Materials & Methods: A 14-year-old boy presented with a left sided facial mass. It was initially thought to be a bug bite or perhaps a wrestling injury. However, it progressed rapidly overall several weeks. CT revealed a well-circumscribed, cystic, 3.9 × 2.8 × 3.2 cmmass centered in the deep lobe of the left parotid gland, also involving the superficial lobe and extending medially through the stylomandibular tunnel with a component extending to the stylomastoid foramen. There was no solid enhancing portion. There were several enlarged level II lymph nodes suspicious for nodal metastases. Results: The mass was biopsied and pathology was consistent with acinic cell carcinoma. Complete left parotidectomy and left selective neck dissection was performed, confirming the diagnosis. Conclusions: Salivary gland neoplasms are rare in children. Less than 5% of salivary gland tumors occur in children. Salivary gland neoplasms account for less than 8% of pediatric head and neck tumors. Approximately 1/3 of salivary gland tumors arising in childhood are malignant; most being mucoepidermoid. Acinic cell carcinoma of the parotid gland in children is extremely rare, especially in those under age 16, with only a few available case reports. This case was also unusual in that the lesion was predominantly cystic.
Transmission of traumatic experiences in the families of war survivors from Bosnia and Herzegovina
Kalina Jordanova
Suvremene Teme : Contemporary Issues , 2012,
Abstract: This paper explores the process of transmitting war experiences from parents tochildren in the contemporary Bosnian context. It is informed by studies in psychoanalysis and cultural anthropology. Using in-depth interviews with families,family trees and children’s drawings, I try to understand why and how parentscommunicate their traumatic memories to their children, and how children respondto their parents’ recollection of the recent past. In brief, I argue that parentsavoid the topic of the war and this avoidance derives from the ambiguity of their experiences in war. Second, their reluctance to talk about a certain part of their life results in fragmentation of history and consequently in a fragmented sense of selfhood and belonging in their children. Fragmentation is also reflected in the fact that the war narratives are gender dependent which means that women’s stories of the war differ from those of their husbands. In most cases, men have difficulties in sharing their war experience with their children for three main reasons. First, they are not able to arrive at a clear-cut narrative on their own participation in the warfare. Second, they seem to lack the language to describe an experience which is felt to be unique and sometimes surreal. Finally, their narrative does not always overlap with the official state-recognizedversion of history.
‘Microphone off’ – application of the process model of interpreting to the classroom. Mikrofonas i jungtas“. Proces modelio taikymas rengiant vert jus od iu
Sylvia Kalina
Kalbotyra , 2007,
Abstract: Straipsnio prad ioje pateikiama trumpa ap valga darb , susijusi su odiniu (konferencij ) vertimu. Pastebima, jog moksliniai tyrimai pasiskirsto tarp proces analiz s ir galutin produkt orientuotos veiklos. Pateikiamas straipsnis sutelktas ties procesais, supan iais vertim od iu, o jo i dava – praktinis vertimo apdorojimo modelis prie ver iant ir netrukus po to. is modelis, akcentuojantis i orini s lyg svarb , o taip pat vert jo pasirengiam j darb prie engiant kabin , pateikiamas vert j rengimo kontekste. Jis apima proces modelio komponentus ir kontekstinius bei situacinius faktorius – tokiu būdu pradedantieji versti parengiami visai veiklai, susijusiai su vertimo od iu profesija.
Fossil fuel savings, carbon emission reduction and economic attractiveness of medium-scale integrated biomass gasification combined cycle cogeneration plants
Kalina Jacek
Thermal Science , 2012, DOI: 10.2298/tsci120126124k
Abstract: The paper theoretically investigates the system made up of fluidized bed gasifier, SGT-100 gas turbine and bottoming steam cycle. Different configurations of the combined cycle plant are examined. A comparison is made between systems with producer gas (PG) and natural gas (NG) fired turbine. Supplementary firing of the PG in a heat recovery steam generator is also taken into account. The performance of the gas turbine is investigated using in-house built Engineering Equation Solver model. Steam cycle is modeled using GateCycleTM simulation software. The results are compared in terms of electric energy generation efficiency, CO2 emission and fossil fuel energy savings. Finally there is performed an economic analysis of a sample project. The results show relatively good performance in the both alternative configurations at different rates of supplementary firing. Furthermore, positive values of economic indices were obtained. [Acknowledgements. This work was carried out within the frame of research project no. N N513 004036, titled: Analysis and optimization of distributed energy conversion plants integrated with gasification of biomass. The project is financed by the Polish Ministry of Science.]
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