Results 111 to 120 of about 502,065 (385)

Non-targeted LC-MS based metabolomics analysis of the urinary steroidal profile [PDF]

, 2017
The urinary steroidal fraction has been extensively explored as non-invasive alternative to monitor pathological conditions as well as to unveil the illicit intake of pseudo-endogenous anabolic steroids in sport.
Botrè, Francesco, de la Torre, Xavier, Palermo, Amelia, Zamboni, Nicola   +3 more
core   +1 more source

Biosynthesis and Identification of Clenbuterol Metabolites in Urine and In Vitro Microsome Incubation Samples Using UHPLC‐Q‐Exactive Orbitrap Mass Spectrometry: A Comparison Between Human and Bovine Metabolism

Drug Testing and Analysis, EarlyView.
Clenbuterol metabolism was studied in bovine and human urine using LC‐Q‐Exactive‐Orbitrap MS; eight metabolites were identified in human and bovine samples as well as a novel N‐methylated form. Four urinary metabolites specific to cattle were detected and identified.
Anuar Gómez‐Tagle, Claudia Bressan, Rosa Ventura, Alan Álvarez‐Sanchez, Enrique Cardenas‐Yong, Benjamín Velasco‐Bejarano   +5 more
wiley   +1 more source

Cortisol levels are positively associated with pup-feeding rates in male meerkats [PDF]

, 2006
In societies of cooperative vertebrates, individual differences in contributions to offspring care are commonly substantial. Recent attempts to explain the causes of this variation have focused on correlations between contributions to care and the ...
Carlson, A.A., Clutton-Brock, T., Jordan, N.R., Manser, M.B., McNeilly, A.S., Russell, A.F., Young, A.J.   +6 more
core   +2 more sources

Detection of Anabolic Androgenic Steroids and Steroid Esters—Comparing Dried Blood Spots Collection Devices and Urine Samples

Drug Testing and Analysis, EarlyView.
DBS (Capitainer‐B50 and Tasso‐M20) enabled detection of testosterone esters in all participants, whereas urine testing (T/E) missed cases including potential UGT2B17 del/del carriers and individuals with testosterone prescription. More AAS and steroid‐esters could be detected in Capitainer‐B50 versus Tasso‐M20.
Tina Suominen, Jeanette von Walden, Laura Harju, Anton Pohanka, Jenny Schulze, Mikael Lehtihet, Lena Ekström   +6 more
wiley   +1 more source

On the effects of testosterone on brain behavioral functions

Frontiers in Neuroscience, 2015
Testosterone influences the brain via organizational and activational effects. Numerous relevant studies on rodents and a few on humans focusing on specific behavioral and cognitive parameters have been published.
P. Celec, D. Ostatníková, J. Hodosy
semanticscholar   +1 more source

Testosterone and androstanediol glucuronide among men in NHANES III

BMC Public Health, 2018
Background Most of the androgen replacement therapies were based on serum testosterone and without measurements of total androgen activities. Whether those with low testosterone also have low levels of androgen activity is largely unknown.
Chuan Wei Duan, Lin Xu
doaj   +1 more source

The effects of strength training on muscle wasting, fat mass and quality of life in men with Prostate Cancer undergoing Androgen Deprivation Therapy: a meta-analysis. [PDF]

, 2018
• In 2013, the probability of a man developing prostate cancer (PCa) was 1 in 6, sitting on top of the charts as the single most common area for men to develop cancer [4].
Hucker, Holly
core  

Comparing plasma and faecal measures of steroid hormones in Adelie penguins Pygoscelis adeliae [PDF]

, 2010
Physiological measurements of both stress and sex hormones are often used to estimate the consequences of natural or human-induced change in ecological studies of various animals.
Banks, Jonathan C., Bell, Dudley G., Bright, A., Carey, P.W., Chandler, J., Hudson, Q.J., Ingram, J.R., Ling, Nicholas, Lyall, K., Morgan, Dai K.J., Möstl, E., Nakagawa, Shinichi, Ninnes, Calum Edward, Stevens, Mark I., Waas, Joseph R., Wallace, J.   +15 more
core   +2 more sources

Prevalence of AAS‐Positive Samples at Drug Abuse Laboratory Sweden Between 2014 and 2023 and Sub‐Study of Dual Use of AAS and Narcotics

Drug Testing and Analysis, EarlyView.
Throughout 2014–2023, over 20,000 AAS analyses have been conducted at the drug of abuse laboratory, Karolinska University Hospital. Approximately 20% and 2% of the samples have been positive for AAS, with no trends of increase or decrease. Around 50% of the AAS‐positive samples were also positive for narcotics (year 2022–2023), with gender differences;
Kim Petterson Bohlin, Tomas Villén, Oscar Hopcraft, Anton Pohanka, Lena Ekström   +4 more
wiley   +1 more source

Testosterone deficiency in the adult males [PDF]

, 2012
Testosterone deficiency leads to multiple problems but can be difficult to diagnose.
Cachia, Mario J.
core