Fibrous Type Research Articles

Urinary Tract Lesions in Cats And Dogs: Epidemio-Pathological Study

The present study aimed to provide an epidemiological and pathological study on urinary tract diseases in dogs and cats, spontaneous cases, encountered in the Department of Pathology, Forensic Medicine, and Necropsy Diagnosis of FMV Cluj from 1st January 2008 to 1st March 2010. The biological material was represented by 49 cadavers, respectively 15 cats and 34 dogs which presented lesions of the urinary tract. The animals were brought to the Veterinary Pathology Department for the necropsy and histopathological exam. Necropsy was performed according to conventional necropsy technique. This was followed by collection of biological samples, inserted into the fixative agent (10% formalin, pH 7) for 24 hours then processed through the paraffin inclusion technique and examined microscopically for histopathological diagnosis. Histological analysis of samples was performed with an Olympus BX 41 optical microscope and image processing was performed using the software CellB. From the total of 768 animals (635 dogs and 133 cats) which were examined during the mentioned period, only 49 animals (6.38%) presented urinary tract lesions. A total of 11.27% of the investigated cats and 5.35% of the investigated dogs presented urinary tract disorders (table 1).Urinary tract pathology, respectively mainly renal pathology, is more important in cats than in dogs, and most significant lesions were represented by acute tubular necrosis (following ethylene-glycol intoxication), chronic fibrous and proliferative nephritis and lipid dystrophy. In dogs, the lesions that predominated were represented by acute and chronic renal infarcts, chronic nephritis (of fibrous and lympho-hystiocitic type), acute tubular necrosis and dystrophies (such as mineralization and hyalinization).

Congenital Ventricular Aneurysm as an Unexpected Complication of Monomorphic Premature Ventricular Contractions

Congenital ventricular diverticulum (CVD) in adults is a rare cardiac malformation, which includes fibrous type congenital ventricular aneurysm (CVA). CVA is often clinically asymptomatic and shows no abnormality in the electrocardiogram or chest X-ray. However, some cases of sudden death resulting from ventricular tachycardia, cardiac embolism or ventricular rupture have been reported. Therefore, physicians should perform further cardiac imaging studies to detect a CVA if ventricular arrhythmia originating from the left ventricle is observed. Here, we report two successfully followed cases of CVA which were diagnosed from premature ventricular contractions.

RAISED INTRAOCULAR PRESSURE

Objective: To measure the rise in intraocular pressure after neodymium:yttrium-aluminum-garnet (Nd:YAG) Laser capsulotomyin pseudophakic patients aged 50 years and above. STUDY DESIGN: Prospective study. Duration of Study: Study was done from May 2005to Dec 2005. (Eight months duration) Settings: Eye department Military Hospital Rawalpindi. Material a n d M e t h o d s : A total of 100 patients,presenting in Eye department, Military Hospital Rawalpindi, fulfilling inclusion and exclusion criteria were included. With a minimum numberof bursts of 3.6 mj / shot energy level with Nd: YAG laser, a 3 to 4 mm hole in the posterior capsule was created. The intraocular pressure wasmeasured 1 hour, 3 hours, 1 day and 1 week after the laser. Results: The rise in intraocular pressure was noticed in 6 (6%) patients afterNd:YAG laser capsulotomy. Five out of six patients had fibrous type of posterior capsular opacification while one patient had Elschnig's pearl.Male to female Ratio was 7:3. C o n c l u s i o n : Our findings suggest that the rise in intraocular pressure is an infrequent complication of Nd:YAGLaser capsulotomy.

Solitary Fibrous Tumor of the Pleura: Surgery and Clinical Course in 18 Cases

Solitary fibrous tumors of the pleura are very rare neoplasms that can sometimes present with malignant features. Between 1984 and 2007, 18 cases were treated in our institution. There were 7 men and 11 women, with a median age of 56 years (range, 33-77 years). All patients underwent surgical treatment. Except for one case with hemangiopericytic features, all tumors were histologically the fibrous type of pleural mesothelioma. Resections were radical and there were no recurrences. There was no perioperative mortality. The outcome was excellent, and all patients have been followed up continuously. Survival rates at 3, 5, and 10 years were calculated as 86.7%, 75%, and 66.7%. One patient died after 18 months (malignant type of solitary fibrous tumor), and 2 died of unrelated disease after 24 and 53 months. Surgery is the treatment of choice, and careful long-term clinical follow-up is required.

GFAP-positive astrocytes are rare or absent in primary adult human brain tissue cultures

Traditionally, astrocytes are divided into fibrous and protoplasmic types based on their morphologic appearance. Here the cultures were prepared separately from the adult human cortical gray and white matter of brain biopsies. Both cultures differed only in the number of glial fibrillary acidic protein (GFAP)-positive cells. In the gray matter these were absent or rare, whereas in confluent cultures from the white matter they reached 0.1% of all cells. Three main morphologic types of GFAP-positive cells were found in this study: stellate, bipolar and large flat cells. GFAP-positive cells with two or three long processes mimic a neuron-like morphology. We did not find process-bearing cells expressing neuronal markers (MAP-2, NF, and N-CAM). The conflicting reports concerning GFAP immunostaining and the study dealing with the presence of putative neurons in adult human brain cultures are discussed with respect to these findings. The latter classification of astrocytes into type 1 and type 2 is based on immunostaining to A2B5 antigen: type 1 (GFAP+/A2B5−) and type 2 (GFAP+/A2B5+) astrocytes are proposed to be analogous to protoplasmic and fibrous astrocytes, respectively. In adult human brain cultures we found only small amount of A2B5-positive cells. Double immunofluorescence revealed that astroglial cells of similar fibrous or bipolar shape grown on one coverslip were either GFAP+/A2B5+ or GFAP+/A2B5−. On the other hand, the A2B5+/GFAP− immunophenotype was not observed. These results indicate that in general the cell phenotype from adult human brain tissue is not well established when they are in culture.

Post-harvest sugar losses in sugarcane varieties at high ambient temperature under subtropical condition

Ten sugarcane varieties were assessed for post harvest sucrose losses (0–120 h) from April through June. The results revealed that the fibrous varieties of late maturing group such as CoSe 92423, CoS 97261 and CoS 8432 showed higher reduction in pol % whereas the less fibrous type of early maturing group like CoS 95255, CoS 96268 and CoS 8436 showed less reduction in pol %.

Numerical modelling of non-Newtonian slurry in a mechanical flotation cell

Certain mineral slurries used in the minerals processing industry have been shown to exhibit non-Newtonian rheologies, particularly with finer particle sizes and at higher solid concentrations. Research has also shown that a cavern containing yielded fluid surrounded by stagnant fluid form around the impeller during the agitation of non-Newtonian fluids exhibiting yield stresses, and this is therefore hypothesised to occur inside mechanical flotation cells which may adversely affect fluid hydrodynamics. A single phase non-Newtonian fluids was modelled using CFD, using the Herschel–Bulkley non-Newtonian model with constants derived from experimentally determined Bindura nickel ore slurry, known to be rheologically complex due to the presence of fibrous mineral types, such as serpentine. The modelling methodology was first validated against published experimental results in a stirred tank, and results were experimentally validated using piezoelectric pressure transducers to measure the magnitude of pressure fluctuations due to the fluid velocity in order to define the cavern boundary. Both experimental and numerical findings show that a cavern forms around the stator, with its size depending on slurry yield stress. It was also found that the shear–stress transport (SST) k – ω turbulence model predicted the cavern boundary most accurately.

Dermatofibroma: a possible model of local fibrosis with epithelial/mesenchymal cell interaction

Dermatofibromas are benign dermal nodules usually seen on the extremities; however, whether a dermatofibroma is a reactive fibrous hyperplasia or a true neoplasm is still unclear. Fibrous type dermatofibromas might be regarded as the symptom of local fibrotic processes and thus present a possible model of local fibrosis. Interaction between proliferated dermatofibroma fibroblasts and overlying elongated epidermis suggests a relationship between keratinocytes and mesenchymal cells. We herein describe current insights into the pathogenesis of dermatofibromas and explore the possible involvement of immunocytes around fibroblasts and effector cells which play an important role in the development of dermatofibromas.

The morphology of Thalictrum L. in Korea

This study were examined for their external morphological characters such as root, leaf, inflorescenses, flower, stamen, pistil, and fruit as to Korean Thalictrum L. and discussed taxanomic value of characters, and made out a new key. This study confirmed that specialized stems and roots type were divided into fibrous type, fibrous having a tuber type, long fusiform tuberous type, tuberoid type, rhizome type and stolon type. The stem were divided into two types based on existence and nonexistence of striate or pubescent. Leaves were usually 2-3-ternately and was divided into three types based on leaf apex, leaf base and number of lobe. Inflorescenses were divided into two type; corymb, panicle. Flower is bisexual, and don't have petal. It was divided from existence and nonexistence of calyx when it flowering. Especially, the stamens were divided from anther shape and apex shape, degree of dilation of filament, epidermic shape of filament etc., and the pistils were divided from glandular on ovary, length of carpel stipe etc.. The fruit is a achene and it was divided from achene shape, achene rib or wings, achene stipe length. This study suggest that useful characters for identifying section are degree of dilation of filament, anther shape, achene rib and wings, degree of dilation of achene. Also, roots, leaf shape, stamen and pistil shape, achene beak and achene length, achene and leaf hair appear to be useful characters for identifying species.

Synthesis, characterization and ion-exchange properties of a fibrous type ‘polymeric-inorganic’ composite cation-exchanger Nylon-6,6 Sn(IV) phosphate: Its application in making Hg(II) selective membrane electrode

A polymeric-inorganic composite cation-exchanger, i.e. Nylon-6,6 Sn(IV) phosphate was synthesized via mixing of polymer Nylon-6,6 into the matrices of inorganic precipitate of Sn(IV) phosphate to form composite cation-exchanger. Ion-exchange capacity (IEC), ion-exchange properties, thermal stability and distribution behavior, etc. were also carried out to understand the cation-exchange behavior of the material. The physico-chemical properties of the material were determined using AAS, CHN elemental analysis, FTIR, TGA-DTA, XRD, and SEM studies. On the basis of distribution studies, the material was found to be highly selective for Hg(II), a highly toxic environmental pollutant. Using this electroactive composite material, a new heterogeneous precipitate based selective membrane electrode was fabricated for the determination of Hg(II) ions in solutions. The membrane electrode is mechanically stable, with a quick response time, and can be operated within a wide pH range. The selectivity coefficients for different cations determined by mixed solution method were found to be less than unity. The electrode was also found to be satisfactory in potentiometric titrations.

Researches on nutrition of the sheep specialized in milk production.

For the sheep belonging to the milk population Palas, being in lactation period, there were created two types of rations, one of fibrous kind and the other of semi-succulent. At the bimonthly examination (Nica-Dermengi method) it was observed that the fodder type influenced the quantity of milk produced by the sheep belonging to Palas milk population: to the sheep fed with fodder rations, fibrous type, the daily average production of milk increased from 1.1540.085 liters at the first examination to 1.4150.082 at the 6th examination; to the sheep fed with fodder rations, semi succulent type, the daily average production of milk increased from 1.045  0.078 liters at the first examination, to 1.2330.088 liters at the 6th examination. The lambs nursed by the sheep belonging to the 1st group, fed with fibrous type ration had greater difficulties at the age of 21 days and also at weaning, in comparison with the lambs nursed by the sheep fed with semi succulent type ration, although their birth weight was less than the one of the lambs of this group. The structure of fodder rations administrated to the sheep within the nursing period influences the morph productive parameters of these animals, the fodder rations of fibrous type ensuring a greater production of the ship within lactation, in comparison with that of the sheep, which received semi-succulent type, rations.

Assessment of sugar losses during staling in different varieties of sugarcane under subtropical condition

Ten sugarcane varieties of early and late maturing types were assessed for post harvest losses (0–120 h) and reduction in cane weight from February through June. The results revealed that the fibrous varieties of late maturing group such as CoSe 92423, CoS 97261 and CoS 8432 showed less reduction in cane weight and higher reduction in pol % whereas the less fibrous type of early maturing group like CoS 95255, CoS 96268 and CoS 8436 showed less reduction in pol % and higher loss in cane weight.

Influence of extrusion parameters on microstructure and texture developments, and their effects on mechanical properties of the magnesium alloy AZ80

Extrusion of the DC-cast alloy AZ80 has been performed at three extrusion ratios (12, 22 and 44) in the temperature range 175 °C ≤ T ≤ 350 °C. Upon extrusion, the as-cast coarse grains undergo pronounced grain refinement and the β-phase constituents form stringers in the extrusion direction. The activation of twinning at low extrusion temperatures promotes nucleation of the recrystallized grains at the twin interfaces and refines the grains size. The higher extrusion ratio increases the extrusion velocity and therefore raises the die exit temperature, which results in a slightly coarsen grain size. The unidirectional deformation and DRX during extrusion leads to a fibrous type of crystallographic texture, which results in anisotropy of the yield stress under tension and compression, usually called “strength differential effect” (SDE). The impact of the SDE weakens by lowering the extrusion temperature and remains unaffected by the variations in the extrusion ratio.

Left ventricular diverticulum:case report and review of the literature

Objective To investigate the characteristic and diagnosis of left ventricular diverticulum. Meth-ods As one left ventricular diverticulum patient was diagnosed by echocardiography in our hospital,we reviewed and analyzed about published in China. Results Left ventricular diverticulum is a rare disease of congenital heart malfor-marion, Echocardiographic characteristics of the left ventricular diverticulum is the saccular evngination of the left ven-tricular wall with the neck of the diverticula being smaller than the body. Left ventricular diverticulum is classified into contractile muscular type and fibrous type ,The saccular wall of contractile muscular diverticulum remain a normal mo-tion and is thinner than the normal wall The saccular wall of the fibrous diverticulum is due to a loss of myocardial thickness, as thin as aneurysm with a dyskinetic motion. Conclusion Left ventricular diverticulum is a rare disease in clinic, echocardiography is very important for diagnosing classifying. Key words: Heart ventricules; Diverticulum; Echocardiography

Stromal cells promote bone invasion by suppressing bone formation in ameloblastoma

To study the stromal variation and role of stromal-tumour cell interaction in impaired bone formation as well as enhanced bone resorption in ameloblastoma. Four types of stroma were observed histologically; fibrous, desmoplastic, myxoid and myxoid with hyalinization. Osteoblast and osteoclast were counted using haematoxylin and eosin sections and immunohistochemistry with CD68. After histomorphometric analysis, only fibrous and myxoid types of stroma were distinctly identified. Secreted frizzled-related peptide (sFRP)-2, transforming growth factor-beta 1 and receptor activator of nuclear factor-kappaB ligand (RANKL) revealed strong expression in myxoid type compared with the normal stroma. Bone morphogenetic protein (BMP)-2 was negative in myxoid type, but positive in normal stroma. Fibrous-type stroma showed weak expression of all antigens except RANKL compared with myxoid type. The results suggest that stroma does not act only in bone resorption, but also in the suppression of new bone formation. sFRP-2 is the main factor for impaired bone formation. The expression of markers related to osteoclastogenesis and suppression of osteoblast formation is higher in myxoid-type than in fibrous-type stroma. Tumour cells create a favourable environment for impaired bone formation by secreting sFRP-2 as well as bone resorption by secreting RANKL and interleukin-6.

Synthesis of short-channeled amino-functionalized SBA-15 and its beneficial applications in base-catalyzed reactions

Abstract Amino-functionalized-SBA-15 catalysts with nanostructured hexagonal platelet morphologies were synthesized directly by using microwave synthesis from the hydrolysis and co-condensation of aminopropyltriethoxysilane (APTES) and sodium metasilicate under a strong acidic condition with the Pluronic P123 triblock copolymer as a structure-directing agent. The amino-functionalized-SBA-15 catalysts were proven by SEM and TEM techniques to have very short channels in the range of 200–300 nm perpendicular to the hexagonal platelet morphologies. These short-channeled catalysts were proven to be effective heterogeneous catalysts in liquid-phase reactions such as Knoevenagel and Claisen-Schmidt condensations as well as in Henry reaction. They exhibited greatly improved catalytic activities over the typical fibrous type SBA-15 catalyst having long channels. Obviously, the easy diffusion and rapid mass transfer of substrate into the short channel mesopores played important roles in the significant improvement in the catalytic activities.

Modeling of the acoustic eigenproblem with sound absorption using boundary element method

This paper deals with determination of resonant frequencies for absorbant 3D acoustic cavities. The behaviour of the sound absorbing boundary can be described with a Robin condition as proposed by Rajakumar et al. [Int. J. Numer. Methods Eng., 36, 3957‐3072 (1993)]. This approach is inaccurate, especially for low frequencies because the absorption coefficient is assumed to be constant. We observed the acoustic admittance for foam and fibrous type materials varies linearly for low frequencies. The introduction of a new absorption coefficient allows to take into account this behavior in order to improve the accuracy in the determination of the first modes (typically less than 500 Hz in car interior). This formulation has been implemented in a boundary element program we have developed. The results are compared with those given by the finite element program ANSYS. Computations are carried out for rectangular parallelepiped and Sedan car interior.

Histologische, morphometrische Untersuchung der menschlichen Synovialmembran

Human synovial membrane was studied by light- and electronmicroscope and histomorphometrically. Areas of distinct structures are seen. The surface structure fold that is mainly seen in the areaolar and adipose synovial membrane type, seemed to be the prime structure for the synovial turn over. Villi have fenestrated capillaries and they are covered of A- and AB-synoviocytes. Villi are regarded as the synovia production areas. The fibrous type of the synovial membrane is mostly smooth surfaced and seemed to be an ordinary fibrous connective tissue. The B-synoviocyte is discussed as fibrocyte.

Neurological manifestations following partial excision in spinal meningioma: case report

Presented here is a 16-year-old girl who was referred on 30th January 1996 with diagnosis of cord compression with spastic paraplegia with sensory level at T7/T8. CT scan myelogam confirmed soft tissue density mass displacing cord to the left with no dye being seen beyond T3. Thoracic spine decompressive laminectomy was performed on 1st January 1996 at Nairobi West Hospital extending from T3 to T6 level, which revealed a fibrous haemorrhagic tumour. Histology showed meningioma (mixed fibrous type and meningoepitheliomatous type) with many psammoma bodies. She had a stormy post-operative period, with infection and wound dehiscence. This was treated with appropriate antibiotics and wound care. She was eventually rehabilitated and was able to walk with the aid of a walking frame because of persistent spasticity of right leg. She was seen once as an outpatient by author on 6th July 1996, she was able to use the walking frame, but the right leg was still held in flexion deformity at the knee. She was thus referred to an orthopaedic surgeon for possible tenotomy. She was able to resume her studies at the University ambulating using a wheel chair and walking frame. She presented with worsening of symptoms in 2001 (five years after her first surgery). MRI scan thoracic spine revealed a left anterolateral intradural lesion extending from T3 to T5 vertebral body level compressing and displacing the spinal cord. She had a repeat surgery on 6th March 2001 at Kenyatta National Hospital; spastic paraparesis and urinary incontinenece persisted. She also developed bed sores and recurrent urinary tract infections. She was followed up by the author and other medical personnel in Mwea Mission Hospital where she eventually succumbed in 2005, nine years after her first surgery. This case is presented as a case of incompletely excised spinal meningioma to highlight some of the problems of managing spinal meningiomas when operating microscope and embolisation of tumours are not readily available. Also the family experienced financial constraint in bringing the patient for regular follow-up, and getting access to appropriate antibiotics, catheters and urine bags.

Myofibroblastic inflammatory tumor of the lung: CT findings with pathologic correlation

The objective of this study was to describe the computed tomographic (CT) features of myofibroblastic inflammatory tumor of the lung with histopathologic correlation. The medical records and imaging studies of eight patients with pathologically proven myofibroblastic inflammatory tumor of the lung were reviewed. On radiographs and CT images, a poorly circumscribed mass or nodule was evident in five patients (six lesions), and a well-circumscribed lesion was evident in three patients (three lesions). Seven lesions were peripheral and two were centrally located. At CT, five lesions were of heterogeneous attenuation and four homogeneous. Increased perilesional parenchymal abnormalities, which were caused by peribronchial inflammatory infiltrates, were observed in three cases. The predominant histopathologic feature was organizing pneumonia type in three cases, lymphoplasmacytic type in three cases, and both organizing pneumonia and lymphoplasmacytic type in two cases. Variable degree of fibrous histiocytoma type was observed in all cases. The imaging characteristics of myofibroblastic inflammatory tumor of the lung are variable and nonspecific. The authors conclude that most cases appear as solitary, peripheral lesions with a predilection for the lower lobes. Associated findings may include perilesional inflammatory changes. Because myofibroblastic inflammatory tumor cannot be reliably differentiated from other pulmonary lesions based solely on the imaging appearance diagnostic biopsy is mandatory. Interpretation of the imaging findings combined with the histopathologic features of disease may help make correct diagnosis.