Morphofunctional evaluation of buccopharyngeal space using three-dimensional cone-beam computed tomography (3D-CBCT).

The present study aims to identify the anatomical functional changes of the buccopharyngeal space in case of singers with canto voice. The interest in this field is particularly important in view of the relation between the artistic performance level, phoniatry and functional anatomy, as the voice formation mechanism is not completely known yet. We conducted a morphometric study on three soprano voices that differ in type and training level. The anatomical soft structures from the superior vocal formant of each soprano were measured on images captured using the Cone-beam Computed Tomography (CBCT) technique. The results obtained, as well as the 3D reconstructions emphasize the particularities of the individual morphological features, especially in case of the experienced soprano soloist, which are found to be different for each anatomical soft structure, as well as for their integrity. The experimental results are encouraging and suggest further development of this study on soprano voices and also on other types of opera voices.

The morphometry of the laryngeal phonatory system - base of the anatomical study of the voice aptitudes.

Speaking is one of the characteristics of the human race and the main factor that has marked our progress over time. The singing voice is the crowning of the speech act and the main component of the lyrical manifestation of personality. Doctors in various fields, but especially anatomists have been concerned about discovering how the voice and the substrate of its variability are formed, but these aspects have not yet been fully deciphered. This study is the starting point in our research on the phonation system, organized on three levels: laryngeal, oral, palatinal, pharyngeal, epiglottal and nasal. We performed the dissection of seven embalmed anatomical parts, on which, we made measurements of the anatomical elements involved in the phonation. We performed the same measurements on a batch of seven adults investigated by magnetic resonance imaging (MRI). The results were entered into the statistical calculation formulas and compared with each other and with the literature. The results of the study show that certain values resulting from the calculation formulas remain constant and others vary greatly from each individuals and gender.

Hydrogenation of Graphene by Reaction at High Pressure and High Temperature.

The chemical reaction between hydrogen and purely sp(2)-bonded graphene to form graphene's purely sp(3)-bonded analogue, graphane, potentially allows the synthesis of a much wider variety of novel two-dimensional materials by opening a pathway to the application of conventional chemistry methods in graphene. Graphene is currently hydrogenated by exposure to atomic hydrogen in a vacuum, but these methods have not yielded a complete conversion of graphene to graphane, even with graphene exposed to hydrogen on both sides of the lattice. By heating graphene in molecular hydrogen under compression to modest high pressure in a diamond anvil cell (2.6-5.0 GPa), we are able to react graphene with hydrogen and propose a method whereby fully hydrogenated graphane may be synthesized for the first time.

Recurrent partial hydatidiform mole, with a first twin pregnancy, after treatment with clomiphene citrate.

We present a patient, treated for 3 months with clomiphen citrate after 5 years of infertility. This treatment resulted in a twin pregnancy, one degenerated into a partial hydatidiform mole and the other into a very early embryo death. The karyotype was a mosaic one: 63% of metaphases showed triploidy - 69 XXX and 37% diploidy - 46 XX. Despite all medical advice, she returned 8 months later with a new pregnancy, which proved to be a new partial hydatidiform mole, this time a single one. Karyotype was, also, a triploidy - 69 XXX. The genetic map of both genitors was performed, showing no aberrations. Unfortunately, the patient came back, once again, 5 months later, with a new positive pregnancy test. Ultrasonography revealed a new very early embryo death, the histopathological analysis establishing to be a single 'pure' stop in evolution of the pregnancy. As all the three pregnancies obtained after treatment with clomiphene were abnormal, two being partial hydatidiform moles and one being a premature miscarriage, without any genetic aberrations of the genitors, it seems very possible that clomiphene, apart from improving fertility, also increases the risk of abnormal ovum appearance.

Antibody elution method for multiple immunohistochemistry on primary antibodies raised in the same species and of the same subtype.

Double or multiple antigen labeling in IHC classically relies on the existence of primary antibodies raised in different species or of different IgG isotypes to ensure the specific labeling with the secondary detection systems. However, suitable pairs of primary antibodies are not always available or the best choice (e.g., as diagnostic tools). During the last few years, several methods have been proposed to overcome this, but none of them offers the flexibility needed for reliable double or multiple enzymatic or fluorescent IHC. We present here a procedure that elutes the antibodies after a first round of immunolabeling, which, in combination with precipitation-based detection systems, allows multiple IHC rounds even for primary antibodies raised in the same species and IgG isotype. Compared with other proposed methods, this procedure ensures a reliable enzymatic or fluorescent staining without cross-reactivity and without loss of tissue antigenicity, thus offering a flexible tool for colocalization studies and pathological diagnosis. This manuscript contains online supplemental material at http://www.jhc.org. Please visit this article online to view these materials.

[Histopathological changes in pseudoexfoliative syndrome]. / Modificari histopatologice în sindromul exfoliativ.

PURPOSE: The purpose of this study was to analyse the structural modifications of the anterior structures of the human eyes with exfoliation syndrome in optic microscopy. MATERIAL AND METHOD: For this we used bulbar conjunctival fragments and the anterior part of the eyes who were eviscerated for the complications of exfoliative glaucoma. For the optic microscopy the human specimens were preserved in paraffin and stained with hematoxiline-eosine, PAS and Congo red method. RESULTS: We have demonstrated in this study using this three coloration that the abnormal material is exfoliative material and not amyloid in all the ocular structures that were studied (conjunctiva, cornea, lens and ciliary body). CONCLUSIONS: All the anterior structures of the eyes that were examined present typical histopathological alterations of the exfoliation syndrome. The Congo red coloration demonstrate that the abnormal material present in all the structures that were examined is exfoliation material and not amyloid.

[Uveal melanoma]. / Melanomul malign uveal.

The paper present a clinic and histological study, including all cases of uveal malignant tumours, hospitalized in Ophthalmological Clinic of Craiova in the last 15 years. The follow-up period of cases were 4 years. The diagnosis was established by clinic and paraclinic examination (imaging methods-- MRI, CT, Echo) and histologic examination. The histologic examination has been done for all cases. There were investigated several parametres: tumour cytology, the level of pigmentation, intravascular embolus, sclera infiltration, vascular invasion, vascular pattern, tumoral necrosis, mitotic activity. The histologic aspects of tumoral progression were: the high level mitotic activity, high surface area of intratumoral necrosis, the infiltrative process to the vessels, sclera, and ciliary body. The arcuat and network vascular patterns were involved in the systemic metastasis and local invasion. The most predominant type of cellularity related with a severe evolution of cases were the epithelioid cells and the mixed type cells.

[Conjunctival changes in pseudoexfoliative syndrome]. / Modificari conjunctivale in sindromul exfoliativ.

PURPOSE: Histopathologic study of conjunctival biopsy specimens in patients with or without exfoliation syndrome and mature cataract to reveal the presence of exfoliative material. MATERIAL AND METHOD: There were studied a group of patients with different ages who needed surgical cataract extraction; all patients were examined preoperative for the presence of exfoliation syndrome. The conjunctival biopsy specimens were obtained at the end of cataract surgical procedure in eyes both with exfoliation syndrome and in fellow eyes without clinical evidence of the disease. RESULTS: It has been recorded the presence of the exfoliative material in eyes both with exfoliation syndrome and in fellow eyes without clinical evidence of the disease. CONCLUSIONS: Conjunctiva appears to be an independent source of exfoliation material with early detection in preclinical stage of exfoliation syndrome in fellow eyes that appeared to be clinically unaffected.

[Neovascular glaucoma--retrospective study]. / Glaucomul neovascular--studiu clinic retrospectiv.

The paper realized the retrospective evaluation of all cases of neovascular glaucoma hospitalized in Clinic of Ophthalmology of Craiova in the last 15 years. Neovascular secondary glaucoma represents 3,9% of all glaucomas. The most important etiologic factors were the central venous occlusion, diabetic retinopathy, carotid occlusion, intraocular tumors, chronic uveitis, Fuchs heterochromy. Neovascular secondary glaucoma is characterized by important hypoxic tissues destructions, presented of all levels that lead to neovessels formation with irreversible anatomic and functional losing of ocular globe. The identification of neovascular glaucoma causes and their treatment is important to prevent that diseases.

[Ocular parasitosis--particular aspects]. / Parazitoze oculare--aspecte particulare.

The goal of this study cases are presented in this study. The first case was emphasized in a patient with an epibulbar tumor and the second case was diagnosed with Toxocara Canis. In both cases the ophthalmoscopic images and the clinical evolution were unusual on the other hand etiological diagnosis in both cases was difficult. In the first case, the surgical procedure was effective, but in the second case the specific antiparasitic treatment could not stop the evolution of corioretinal's lesions; it required laser therapy.