Distribution of n-alkanes in the Northern Italy aerosols: data handling of GC-MS signals for homologous series characterization.

The paper describes the characterization of n-alkane homologous series present in PM samples performed by gas chromatography-mass spectrometry analysis. The PM samples were collected in three locations in northern Italy: Milan, a large urban area, Oasi Bine, a rural site far from big city centers, and Alpe San Colombano, a remote, high altitude site in the Alps. They represent different particle sizes (PM(1), PM(2.5), PM(10)) and seasons (summer, fall, and winter). The analyzed samples were characterized in terms of PM total mass, total concentration of C(20)-C(32) n-alkanes and carbon preference index, CPI, to quantify the relative abundance of odd versus even n-alkanes. As alternative to the conventional method based on peak integration, a chemometric approach based on autocovariance function (EACVF) computation was found reliable to characterize the homologous series. In particular two parameters have proven useful chemical markers for tracking the biogenic and anthropogenic origins of n-alkanes: CPI(EACVF) and series %, estimating the % n-alkanes abundance relative to total alkane concentration. The investigated samples display a large variation in the n-alkanes relative abundance: the lowest values (series % = 1-14%) were found in summer and the highest (series % = 24-48%) in winter. In addition, a considerable seasonal variation of CPI(EACVF) values can be identified for all the sampling sites: the CPI(EACVF) values are close to 1 (CPI(EACVF) = 0.8-1.2) in the cold seasons, revealing a strong contribution from anthropogenic emissions, while spreader values (CPI(EACVF) = 0.9-3) were found in the warm season, that is, reflecting a variable contribution from biogenic sources in combination with anthropogenic emissions.

Subjective effects of Lepidium meyenii (Maca) extract on well-being and sexual performances in patients with mild erectile dysfunction: a randomised, double-blind clinical trial.

Lepidium meyenii (Maca) is a cultivated root belonging to the brassica family used in the Andean region for its supposed aphrodisiac properties. We carried out a double-blind clinical trial on 50 Caucasian men affected by mild erectile dysfunction (ED), randomised to treatment with Maca dry extract, 2400 mg, or placebo. The treatment effect on ED and subjective well-being was tested administrating before and after 12 weeks the International Index of Erectile Function (IIEF-5) and the Satisfaction Profile (SAT-P). After 12 weeks of treatment, both Maca- and placebo-treated patients experienced a significant increase in IIEF-5 score (P < 0.05 for both). However, patients taking Maca experienced a more significant increase than those taking placebo (1.6 +/- 1.1 versus 0.5 +/- 0.6, P < 0.001). Both Maca- and placebo-treated subjects experienced a significant improvement in psychological performance-related SAT-P score, but the Maca group higher than that of placebo group (+9 +/- 6 versus +6 +/- 5, P < 0.05). However, only Maca-treated patients experienced a significant improvement in physical and social performance-related SAT-P score compared with the baseline (+7 +/- 6 and +7 +/- 6, both P < 0.05). In conclusion, our data support a small but significant effect of Maca supplementation on subjective perception of general and sexual well-being in adult patients with mild ED.

[Radical prostatectomy: which quality of life?]. / Prostatectomia radicale retropubica: quale qualità di vita?

The aim of the present study was to evaluate quality of life in patients submitted to radical prostatectomy, by correlating the results of the postoperative condition with follow- up data at 6 and 12 months. MATERIALS AND METHODS. Between october 2004 and december 2005, 68 patients - mean age 68 (range 49-76) - treated with radical retro-pubic prostatectomy for localized prostate cancer (T2a, T2b, No, Mo) were consecutively enrolled onto the study. All patients underwent sexual as well as urinary incontinence rehabilitation, showing good compliance. We evaluated quality of life before prostatectomy (T0), 6 (T1) and 12 (T2) months after surgery through the Short Form 36 questionnaire, for which an analysis of variance for repeated measures was carried out. Patients were interviewed by our department psychologist regarding urinary incontinence and erectile dysfunction. All patients were disease-free at the time of evaluation. RESULTS. No significant differences were observed between physical and mental health indices. Conversely, a significant improvement (p<0.001) was seen in all SF-36-questionnaire 8 scales, comparing preoperative T0 values with T1 and T2 values. Of the 68 patients, 53 (78%) no longer needed pads at the T2 follow-up, while 15 (22%) reported using 3-4 pads/day. A significant worsening of the sexual function (maintenance of erection) was observed in 51 (75%) patients, who had reported having normal sexual activity preoperatively (T0). On the other hand, 17 (25%) patients reported having an adequate erection to engage in sexual intercourse. CONCLUSIONS. Despite the differences observed in physical and mental health scores during the three periods evaluated (T0, T1 and T2), overall quality of life does not appear to have been greatly compromised by surgery. At T2 follow-up, in fact, all 68 patients reported to be satisfied with having undergone radical prostatectomy because of its benefits in terms of survival and its limited effects on their quality of life.

Tension-free vaginal tape and female stress incontinence: further evidence of effectiveness.

OBJECTIVES: Female stress incontinence is a frequent and distressing event with subsequent impact on quality of life. The tension-free vaginal tape (TVT) technique is considered to fulfill the criteria for an ideal surgical procedure and we therefore reviewed our cases to further analyze its effectiveness. MATERIALS AND METHODS: 57 patients suffering from stress incontinence with grade 1-2 cystocele underwent the TVT operation. During follow-up (mean 22.2 months), the short- and long-term results were investigated. RESULTS: 91.3% of patients achieved complete resolution of previous stress incontinence in the early postoperative period. Early complications occurred in 8.7% of patients. Follow-up (mean 22.2 months) highlighted the stabilization of positive outcomes in 87.7% of cases. No postoperative modification of sexual habits and a significant improvement in quality of life were reported by all patients. CONCLUSION: The results of our study confirm that the TVT technique for stress incontinence is an easy to perform procedure which is safe, effective and long-lasting.