Biological nitrogen fixation in Crotalaria species estimated using the 15N isotope dilution method

A greenhouse experiment was conducted to measure nitrogen fixation in three Crotalaria species : C. ochroleuca, C. perrottetii and C. retusa growing in Senegal by using 15N direct isotope dilution technique. Two non-fixing plants, Senna obtusifolia and Senna occidentalis served as reference plants. The amount of nitrogen fixed two months after planting was obtained using the average of the two reference plants. The atom % 15N excess in the Crotalaria species was significantly lower than that of the reference plants, indicating that significant nitrogen fixation occurred in the three plants. Significant differences were observed between the Crotalaria species; C. ochroleuca yielded more dry matter weight and total nitrogen than did C. perrottetti and C. retusa. The % nitrogen derived from atmosphere (%Ndfa) in leaves and stems was also higher in C. ochroleuca. There was no significant difference in %Ndfa in the whole plant between the three Crotalaria species (47% to 53%). In contrast, interspecific variability was observed based on the %Ndfa. C. ochroleuca significantly exhibited the higher amount of total nitrogen fixed, equivalent to 83 kg of nitrogen fixed per hectare. Based on these data, it was concluded that C. ochroleuca could be used in multiple cropping systems in Senegal for making more nitrogen available to other plants. (African Journal of Biotechnology: 2002 1(1): 17-22

Urètrocèle post-traumatique chez l’homme: A propos de 2 cas

RésuméAffection rare chez l’homme, le diverticule urétral est souvent d’origine acquise. Nous rapportons deux cas d’urètrocèle post-traumatique chez des sujets jeunes qui ont été traités avec succès par chirurgie ouverte et nous en discutons les aspects cliniques para cliniques et thérapeutiques.AbstractUrethral diverticulum is unusual in male where it is often acquired. We report two cases of post-traumatic urethrocele in young male managed successfully by open surgery. We describe herein, the clinical, paraclinical and therapeutic features

Qualitative Analysis of the Content Found in Online Discussion Boards for Urethral Stricture Disease and Urethroplasty.

ObjectiveTo describe the patient experience and chief concerns with urethroplasty to improve physician understanding and patient education. Online discussion boards allow patients with urethral stricture disease (USD) to connect with other USD patients. It is unknown how men use these web resources and what information is available about urethroplasty.MethodsThree online forums featuring urethroplasty were identified by Google search. Thematic analysis categorized the content of posts using manually applied codes, with inter-rater reliability and descriptive statistics generated by Dedoose (Los Angeles, CA).ResultsA total of 140 unique posters contributed 553 posts to the forums. Posts were categorized as information support (n = 651), issues posturethroplasty (n = 470), own experience preurethroplasty (n = 336), feelings towards other posters (n = 312), what to expect posturethroplasty (n = 265), feelings after urethroplasty (n = 228), and considerations before urethroplasty (n = 134). Experience navigating the healthcare system with USD (n = 141) and weak urine stream (n = 70) were the most frequent preurethroplasty complaints. Postoperative pain (n = 164) was the most frequent issue. Patients expressed more positivity (n = 126) and satisfaction (n = 120) than negativity (n = 33) with urethroplasty.ConclusionPatients participated in online discussions to share experiences with USD and urethroplasty, receive emotional support, and find answers. Men were more often satisfied than not with their urethroplasty outcomes, with 88% of postoperative feelings coded as positive or satisfied compared to negative. This study provides physicians with insight into the experiences of patients and how to best educate them

La lithotripsie extracorporelle: expérience d’un centre Sénégalais

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