ABSTRACT
Different coalescence processes on 1D silver nanostructures synthesized by a PVP assisted reaction in ethylene glycol at 160 °C were studied experimentally and theoretically. Analysis by TEM and HRTEM shows different defects found on the body of these materials, suggesting that they were induced by previous coalescence processes in the synthesis stage. TEM observations showed that irradiation with the electron beam eliminates the boundaries formed near the edges of the structures, suggesting that this process can be carried out by the application of other means of energy (i.e. thermal). These results were also confirmed by theoretical calculations by Monte Carlo simulations using a Sutton-Chen potential. A theoretical study by molecular dynamics simulation of the different coalescence processes on 1D silver nanostructures is presented, showing a surface energy driven sequence followed to form the final coalesced structure. Calculations were made at 1000-1300 K, which is near the melting temperature of silver (1234 K). Based on these results, it is proposed that 1D nanostructures can grow through a secondary mechanism based on coalescence, without losing their dimensionality.
Subject(s)
Arthritis, Juvenile/diagnosis , Rheumatic Heart Disease/diagnosis , Streptococcal Infections/diagnosis , Tachycardia, Paroxysmal/diagnosis , Acute Disease , Adolescent , Adult , Arthritis, Juvenile/genetics , Diagnosis, Differential , Electrocardiography , Female , Humans , Male , Rheumatic Heart Disease/genetics , Streptococcal Infections/genetics , Tachycardia, Paroxysmal/geneticsSubject(s)
Heart Defects, Congenital/pathology , Leukemia, Myeloid, Acute/pathology , Spleen/abnormalities , Diagnosis, Differential , Female , Heart Defects, Congenital/diagnosis , Humans , Infant, Newborn , Leukemia, Myeloid, Acute/diagnosis , Pseudomonas Infections/diagnosis , Pseudomonas Infections/pathologySubject(s)
Cyanides/poisoning , Fruit , Seeds , Child, Preschool , Female , Furosemide/therapeutic use , Humans , Infant , Male , Sodium , Sodium Nitrite/therapeutic use , Thiosulfates/therapeutic useABSTRACT
After a short history of the VAE, a new method in the intervention radiology, the authors present the technique and results of the experimental renal VAE performed on dogs, with autologous clot, Gelaspon and Isobutyl-2-cyanoacrylat. The favourable results of the experimental investigations permitted for the first time in our country the use of VAE in inoperable renal cancers. The paper presents the clinico-therapeutical results of VAE as well as the control angiographic and echotomographic aspects after embolization. The conclusions support the need of using VAE both preoperatively and in the inoperable cases of renal cancer, suggesting the possibility of extending the use of this method to other visceral cancers with selective arterial catheterizations approach.
Subject(s)
Bucrylate/administration & dosage , Embolization, Therapeutic/methods , Gelatin Sponge, Absorbable/administration & dosage , Hemostatics/administration & dosage , Kidney Neoplasms/therapy , Radiology, Interventional , Tissue Adhesives/administration & dosage , Animals , Dogs , Humans , Kidney Neoplasms/pathology , Lymphatic Metastasis , Male , Middle Aged , Neoplasm Staging , Neoplasms, Experimental , Palliative Care/methods , Radiology, Interventional/methods , Treatment OutcomeABSTRACT
The authors use an autocolpotransplantate in the surgery of the genitale prolapse with urinary stress incontinence (vaginale colpohysterectomy, Manchester-Fothergill-Operation anterior and posterior colporrhaphy). The autocolpotransplantate functions as a subvesical belt which is able to avoid recidivs and also favours the formation of new tissue in the urethro-vesico-vaginale area. The newly formed scarplate is the basis to prevent postoperative vesical continence disorders.
