Search results for "NAD"
showing 10 items of 2033 documents
Retention of Vanadium(V), Molybdenum(VI) and Tungsten(VI) by Kaolin
1993
Abstract The ability of kaolin (approximately H2Al2Si2O8 · H2O), a well known clay mineral constituent, to retain V(V) andMo(VI) species from 10−5 and 10−4 M solutions, and W(VI) species from 10−4 M solutions was investigated in the pH range 2–7.5 using a solid/liquid ratio 1:100 (w:v). The equilibration time in the adsorption studies was 72 h, and the shaking time in the desorption studies was 17 h. 0.02 M KCl was used as ionic medium and desorbing liquid. V(V), Mo(VI) and W(VI) were all retained by kaolin to some extent, and the amounts of the elements which could be washed away from kaolin with 0.02 M KCl were very small. The pH dependence of the adsorption was considerable: when added a…
Does Preoperative Treatment with a Gonadotropin-Releasing Hormone Agonist Improve the Outcome of Endometrial Resection?
1998
Abstract Study Objective. To verify if more favorable long-term results of endometrial resection can be obtained with preoperative gonadotropin-releasing hormone (GnRH) agonist treatment. Design. Multicenter, randomized, controlled trial (Canadian Task Force classification I). Setting. Tertiary care academic department. Patients. Sixty-three premenopausal women with established menorrhagia. Intervention. Eight weeks of goserelin depot treatment before endometrial resection or immediate surgery in the early proliferative phase of the cycle. Measurements and Main Results. Variations in menstrual patterns and bleeding scores as well as overall degree of satisfaction with treatment were determi…
Does the level of serum antimüllerian hormone predict ovulatory function in women with polycystic ovary syndrome with aging?
2012
Abstract OBJECTIVE: To determine possible prediction of regular menses with aging in anovulatory women with polycystic ovary syndrome (PCOS). DESIGN: Cohort. SETTING: Academic practice. PATIENT(S): A total of 54 anovulatory women with PCOS and 28 age- and weight-matched control subjects. INTERVENTION(S): Blood and ovarian ultrasound at baseline and after 5 years. MAJOR OUTCOME MEASURE(S): Serum antimüllerian hormone (AMH), gonadotropins, androgens, insulin sensitivity, and ovarian ultrasound. RESULT(S): After 5 years, there was a significant decrease in AMH in women with PCOS and control subjects (10 of 54 anovulatory women became ovulatory after 5 years). There was a significant negative c…
Emergence of ovulatory cycles with aging in women with polycystic ovary syndrome (PCOS) alters the trajectory of cardiovascular and metabolic risk fa…
2013
Abstract STUDY QUESTION: What alters cardiovascular and metabolic risk factors with aging in women with polycystic ovary syndrome (PCOS)? SUMMARY ANSWER: Lipid parameters, mainly low-density lipoprotein (LDL) cholesterol, increase with aging, but not in women who attain ovulatory cycles. WHAT IS KNOWN ALREADY: Cardiovascular and metabolic parameters tend to increase with aging, but this has not been shown in a prospective longitudinal study in women with PCOS. Correlates of these changes have not been identified. STUDY DESIGN: A prospective cohort of 118 hyperandrogenic women with PCOS who were followed from the age of 20-25 years at 5 year intervals for 20 years. PARTICIPANTS/MATERIALS, SE…
Hormone therapy is associated with better body composition and adipokine/glucose profiles
2012
Objective: The aim of this study was to evaluate the possibility of preventing the metabolic health consequences of postmenopausal hypogonadism with the use of long-term hormone therapy (HT). Methods: We used a monozygotic co-twin control design including 10 twin pairs (aged 56-62 y) discordant for HT (duration of HT, 2-10 y). In addition, 14 premenopausal women (aged 29-35 y) who did not use HT were studied to evaluate the differences in metabolic health between the premenopausal and postmenopausal states. Body composition was determined, and waist-to-hip ratio was used as an estimate for fat distribution. Serum sex steroids, sex hormone-binding globulin, and serum lipid and glucose profil…
Cross-Country Measurement Invariance and Effects of Sociodemographic Factors on Body Weight and Shape Concern-Related Constructs in Eight Countries.
2020
The aim of this study was to examine the cross-country invariance of five well-established measures of body weight and shape concern-related attitudes and behaviors (i.e., drive for leanness, drive for muscularity, strategies to increase muscle, strategies to lose weight, and weight and shape concerns). A secondary objective was to examine the effects of several sociodemographic factors (age, BMI, socioeconomic status, and gender) on item and latent factor scores of these constructs. A total of 6272 emerging adults (4218 women; Mage = 21.46, SD = 3.11) from Australia, Belgium, Canada, China, Italy, Japan, Spain, and the U.S. completed a self-report online survey as part of a larger study. O…
Mantenimiento de la lactancia materna exclusiva a los 3 meses posparto: experiencia en un departamento de salud de la Comunidad Valenciana
2019
Resumen: Objetivos: Determinar la prevalencia de la lactancia materna exclusiva (LME) a los 3 meses posparto, y conocer las causas que contribuyen al abandono precoz. Diseño: Estudio observacional y restrospectivo. Emplazamiento: Departamento de Salud de la Ribera, Valencia, España. Participantes: Niños nacidos entre diciembre de 2012 y enero de 2017. Mediciones principales: prevalencia de lactancia materna al alta y de LME a los 3 meses. Motivos de abandono de LME. Determinación de Chi-cuadrado entre variables categóricas. Metodología: Las mujeres fueron entrevistadas en el posparto y a los 3 meses posparto, teniendo en cuenta las variables asociadas al inicio de la lactancia y su continua…
Physiological Estrogen Replacement May Enhance the Effectiveness of the Gonadotropin-Releasing Hormone Agonist in the Treatment of Hirsutism
1994
GnRH agonists (GnRH-A) have been used for the treatment of hirsutism in women with ovarian hyperandrogenism. However, significant side-effects, including vasomotor symptoms and bone loss, have prevented the long term use of this therapy. In this study, we evaluated the effects of low dose (physiological) estrogen replacement on the side-effects and clinical and hormonal parameters of 22 hirsute women with ovarian hyperandrogenism when treated with a long-acting GnRH-A, Decapeptyl. Ten patients with Ferriman-Gallwey (FG) scores averaging 13.4 +/- 1.5 were randomly assigned to be treated with Decapeptyl alone (3.75 mg, im, every 28 days for 6 months), and 12 other patients with FG scores aver…
The endocrine pattern of late onset adrenal hyperplasia (21-hydroxylase deficiency)
1984
We describe 5 adult women with severe hirsutism due to late onset 21-hydroxylase deficiency. Diagnosis was performed on the finding of high serum 17-hydroxyprogesterone (17OHP) levels with a marked hyperresponse to an ACTH test. The endocrine study showed in most patients a gonadotropin behavior similar to that observed in classical polycystic ovary (PCO) syndrome. Prolactin levels were slightly increased in basal conditions and presented an exaggerated response to TRH stimulation.
Impact of luteinizing hormone administration on gonadotropin-releasing hormone antagonist cycles: an age-adjusted analysis
2011
Objective: To analyze the impact of LH administration on cycle outcome in ovarian stimulation with GnRH antagonists. Design: Randomized, open-label, controlled trial performed in two age subgroups. Recombinant (r) FSH versus rFSH + rLH administration was compared. Setting: University-affiliated private infertility clinic. Patient(s): Up to 35 years old (n = 380) and aged 36 to 39 years (n = 340), undergoing their first or second IVF cycle. Intervention(s): Recombinant LH administration since stimulation day 1. Main Outcome Measure(s): Implantation rate, ongoing pregnancy rate. Result(s): In the young population, implantation rates were similar: 27.8% versus 28.6%, odds ratio (OR) 1.03 (95% …