18 research outputs found
Multiwalled Carbon Nanotubes Anode in Lithium-Ion Battery with LiCoO<sub>2</sub>, Li[Ni<sub>1/3</sub>Co<sub>1/3</sub>Mn<sub>1/3</sub>]O<sub>2</sub>, and LiFe<sub>1/4</sub>Mn<sub>1/2</sub>Co<sub>1/4</sub>PO<sub>4</sub> Cathodes
No full textMultiwalled carbon nanotubes (MWCNTs) are studied for the first time as the anode in lithium-ion batteries using LiCoO2, Li[Ni1/3Co1/3Mn1/3]O2, and LiFe1/4Mn1/2Co1/4PO4cathodes. The anode material has a partially graphitic structure and nanotube morphology, which ensure stable cycling, Coulombic efficiency exceeding 99% as well as remarkable rate-capability in lithium half-cell, and suggest the compatibility for full-cell application. The performance of each lithium-ion array appears strongly related to the different structural, morphological and electrochemical features of the positive electrodes. The study in full-cell of the MWCNTs anode, to date mostly investigated in lithium half-cell, is therefore performed under various conditions. The MWCNTs/Li[Ni1/3Co1/3Mn1/3]O2combination reveals promising behavior in terms of cycling stability, reversible capacity and Coulombic efficiency, which well demonstrates the potential suitability of MWCNTs as anodes in lithium-ion cell
A rare case of ileo-ileal intussusception due to a bleeding lipomatous mass treated by laparoscopic ileal resection
No full textINTRODUZIONE: L’intussuscezione intestinale dell’adulto è una rara condizione di occlusione intestinale che spesso ha una presentazione atipica. Può essere associato a tumori intestinali primitivi o secondari e, raramente, a masse lipomatose. Anche se l’esatto meccanismo per cui avviene l’intussuscezione non è conosciuto, si ritiene che sia associato a movimenti anomali della parete intestinale, che causerebbero l’ostruzione. CASO CLINICO: Riportiamo il caso clinico di un uomo di 69 anni che si presenta alla nostra osservazione con una storia di sanguinamento gastrointestinale e anemizzazione. Gli esami endoscopici (EGDS e coloscopia) erano entrambi negativi per sanguinamento. La Tc addome con mezzo di contrasto evidenziava un’ernia transomentale nel quadrante addominale inferiore destro senza segni di sanguinamento attivo o evidenza di tumore. La successiva laparoscopia esplorativa ha rilevato una intussuscezione ileo-ileale causata da una massa sottomucosa nell’ileo distale; pertanto è stata eseguita la riduzione laparoscopica e resezione segmentale del tratto ileale coinvolto. Il paziente è stato dimesso in III giornata post-operatoria in buone condizioni cliniche generali. L’esame istologico ha confermato l’origine lipomatosa della lesione. CONCLUSIONE: l’intussuscezione ileale causata da lipoma è una condizione rara, che può essere diagnosticata con metodiche di imaging, ma spesso la diagnosi preoperatoria è difficile. Il trattamento di scelta è la riduzione chirurgica dell’intussuscezione e la resezione (laparoscopica o laparotomica) del tratto in questione.INTRODUCTION: Adult intussusception is a rare cause of bowel obstruction with atypical presentation. It can be associated with primary or secondary intestinal tumors and, rarely, with lipomatous masses. CASE REPORT: We report the case of a 69-year old man presenting with a history of gastrointestinal bleeding and anemia. Upper and lower endoscopies were negative for bleeding. On abdominal contrast enhanced computerized tomography (CT) scan, a trans-omental hernia in the right lower abdominal quadrant was diagnosed with no active bleeding or evidence of tumor. On exploratory laparoscopy we detected an ileo-ileal intussusception caused by a submucosal mass in the distal ileum, which was reduced and we then performed a segmental resection of the involved small bowel tract. The patient fully recovered by postoperative day 3 when he was discharged home. Final pathology confirmed an ileal lipoma. CONCLUSION: Ileal intussusception caused by lipoma is a rare condition, which can be diagnosed with endoscopy, barium enema, and abdominal ultrasound or CT scanning, but preoperative diagnosis may be difficult. The treatment of choice is the reduction of the intussusception and the resection (laparoscopic or open) of the involved tract
Rilevazione di specie batteriche implicate nelle perimplantiti/mucositi con esame colturale e Real-Time PCR
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Candida spp. e igiene dentale: incidenza e prevenzione.
No full textASPETTI CLINICI DELLE LESIONI SOSTENUTE DAI LIEVITI DEL GENERE CANDIDA OSSERVATI DURANTE LE SEDUTE DI IGIENE ORALE: INCIDENZA E PREVENZIONE
Confronto di due metodiche nella rivelazione di specie batteriche implicate nelle parodontopatie: esame colturale e Real-Time PCR.
No full textRILEVAZIONE DI SPECIE BATTERICHE IN PAZIENTI CON PARODONTITE CRONICA, PARODONTITE AGGRESSIVA LOCALIZZATA E PARODONTITE AGGRESSIVA. TERAPIA PARODONTALE NON CHIRURGICA E RIVALUATZIONE CLINICA DOPO 3 MESI
Risk of caries and oral health: preliminary study
No full textIntroduction. The incidence of injury cariosa remains high, despite the improvements achieved in the last years. Recent national epidemiological surveys, 4 years old children have healthy teeth in 80% of cases at 12 years the percentage is reduced to 50%. In Italy, the almost total absence on the territory of “dental services to the Community”, makes even more difficult to achieve a solution to the problem “caries.” To address this problem, the Ministry of Labor, Health and Social Policy in October 2008 adopted the national guidelines in order to make suggestions to the various professionals (pediatricians, dentists, microbiologists, dental hygienists, etc.), making them interact to maintain and restore oral health. It was the first time that the Ministry of Health has addressed the problem by inserting the figure of the microbiologist in dentistry. Aims. The present study aim was to identify subjects at risk of caries by clinical microbiological testing of saliva and the index DMFT/dmft (Decayed, Missing and Filling Permanent Teeth) in both adults and particularly children in order to take preventive measures early as reported in “National guidelines for the promotion of oral health and prevention of oral diseases in age of development”. The study began in June 2009 and will last one year with as goal to have, in 2010, 90% of children between 5 and 6 years caries free and 18 years with any lost tooth decay. Materials and methods. Recruited 164 patients were divided into three age groups: 124 adults aged between 20 and 40 years, 40 children which 21 till 5 years old and 19 till 12 years old. Microbiological testing was aimed by finding CFU / ml of saliva of Streptococcus mutans and Lactobacillus spp., Slide CRT bacteria (Ivoclar). Clinically, intraoral examination was performed to evaluate the DMFT (Decayed teeth, Missing or Filling) calculated over 28 permanent teeth and the dmft (decayed teeth, missing or filling) calculated on 20 deciduous teeth in children, using the form ‘s WHO. Results. 35.97% of the samples tested positive with a high bacterial count> 105 CFU / ml of saliva concerning S.mutans and 31.70% were positive with a high bacterial count> 105 CFU / ml of saliva concerning Lactobacillus spp. The DMFT of adults was equal to 2.1, the one of children of 12 years was equal to 1.5 and the one of children of 4 years was equal to 1.01. Conclusions.The results confirmed the importance of checking regularly, at least 2 times a year, individuals who are charged with critical S.mutans and Lactobacillus spp. through microbiological testing of saliva and through DMFT / dmft indexes for early detection of individuals at risk of caries
Identificazione di batteri presenti nella placca sottogengivale in pazienti con malattia parodontale.
No full textSONO STATI ISOLATI ED IDENTIFICATI BATTERI ANAEROBI DA PAZIENTI CON MALATTIA PARODONTALE SIA CON I METODI TRADIZIONALE SIA CON REAL TIME PCR SONO STATI CONFRONTATI I RISULTATI
Detection of bacterial species involved in perimplantitis concerned with cultural and RT-PCR
No full textDental implants offer new treatment options for edentulous either partially or completely, now represent a viable alternative to conventional fixed protheses. Dental implants are colonized by a flora dominated by Gram-positive facultative aerobic, while in patients with bone loss and formation of pockets peri-implant diseases was found a significant difference in the composition of microflora, bacteria, Gram-negative anaerobes in particular Fusobacterium spp., Treponema denticola (Spirochetes), Tannerella forsythensis, Aggregatibacter actinomycetemcomitans, Prevotella intermedia as interim black-pigmented bacteria, Porphyromonas gingivalis, often in high concentrations. Aims. The purpose of this study was to identify those at risk of perimplantitis using 2 techniques: RT-PCR examination of trade and culture. The results were compared taking into consideration the advantages and disadvantages of both methods. Materials and methods.We studied 24 patients (14 women and 10 men), aged, women between 43 and 76 years, with an average of 63.8 + / - 10.9 years, men between 45 and 88 years with a average of 64.3 years + / - 12.5 years. Was performed a double levy of sub-gingival plaque at multiple sites that had an implant CAL (clinical attachment level)> 4mm in order to assess the microbiological identification with the two techniques: Examining culture and Real-Time PCR of Commerce ( Gum-Sunstar) that identifies 4 bacterial species: A. actinomycetemcomitans (A.a.), P.gingivalis (P.g.), T.forsythensis (T.f.), and T.denticola (T.d.). Results. All patients studied were positive to both tests with charger high: the consideration of tenure, with CFU / ml > 105, was positive in 66.6% of samples by:T.f., and P.g., in 12.5% for A.a., while T.d. not been sought by examining culture, the RT-PCR was positive, with high loads, in 95.8% of samples for T.f., in 79.1% for P.g., in 12.5% for A.a. and 20.8% for T.d.The test crop showed the presence of even P.intermedia in 91.6% of the samples, as well as Capnocytophaga spp. in 54.1%, F.nucleatum spp. in 50% and Campylobacter spp. 25%. Conclusions.The data show that RT-PCR has greater sensitivity than culture examination as well as response times are in favor of RT-PCR, but the kits Trade identify a limited number of species present no bacterial resistance if it were taking antibiotics.There are several factors (genetic, environmental and systemic diseases) of the subject that may affect the results of microbiological contamination. It is perhaps for this reason that many dentists often consider the microbiological examination of “unsafe” because there are not always matching the survey clinical microbiological examination then the same situation microbiological not always the same clinical situation. Being able to pinpoint those responsible for periodontal infection and inflammation, however, offers the opportunity to vary quite rightly, on the basis of virulence factors and evaluation of bacteria, the timing of recalls for the TPS (periodontal therapy support), leaving as a last choice antibiotic therapy targeted
