Results 71 to 80 of about 4,998,988 (263)

Use of alumina, sephadex G10, and ion-exchange columns to purify samples for determination of epinephrine, norepinephrine, dopamine, homovanillic acid, and 5-hydroxyindoleacetic acid in urine.

Clinical Chemistry, 1982
We investigated the usefulness of small Sephadex columns, prepared in Pasteur pipettes, in purifying samples to be analyzed for catecholamines, homovanillic acid, and 5-hydroxyindoleacetic acid. After free catecholamines in urine samples were purified on
B. Westerink, F. Bosker, J. O'Hanlon
semanticscholar   +1 more source

Aetiopathogenesis of infantile epileptic spasms syndrome and mechanisms of action of adrenocorticotrophin hormone/corticosteroids in children: A scoping review

Developmental Medicine &Child Neurology, EarlyView.
Why does infantile epileptic spasms syndrome (IESS) occur with a variety of underlying conditions and why does it respond to adrenocorticotrophin hormone (ACTH)/corticosteroids? Our scoping review summarizes five hypotheses from the literature: gene/epigenetic regulation, stress/HPA axis activation, neuroinflammation/immune function, altered neuronal ...
Emily A. Innes, Velda X. Han, Shrujna Patel, Michelle A. Farrar, Deepak Gill, Shekeeb S. Mohammad, Russell C. Dale   +6 more
wiley   +1 more source

Geometric-algebraic approach to aqueous solutions of diprotic acids and its buffer mixtures [PDF]

arXiv, 2023
A closed-form analytical expression for $\ce{[H3O+]}$ has been obtained for aqueous solutions of diprotic acids and its soluble salts. This formula allows to calculate the pH of aqueous solutions of diprotic acids, their buffer solutions, and the titrations of these two by a strong base, from the values of p$K_1$, p$K_2$, and the effective ...
arxiv  

Prediction of progression-free survival in patients with advanced, well-differentiated, neuroendocrine tumors being treated with a somatostatin analog: the GETNE-TRASGU study [PDF]

, 2019
Artículo escrito por un elevado número de autores, sólo se referencian el que aparece en primer lugar, y los autores pertenecientes a la UAMSomatostatin analogs (SSAs) are recommended for the first-line treatment of most patients with well ...
Carmona Bayonas, Alberto, Marazuela, Mónica   +1 more
core   +1 more source

The impact of re‐characterizing metastatic pancreatic neuroendocrine tumors: A prospective study

Journal of Neuroendocrinology, EarlyView.
Abstract The biology of metastatic pancreatic neuroendocrine tumors (panNET) may alter over time. It remains to be defined if, how, and when this patient group should be recommended to re‐evaluate the characteristics of their disease. This prospective single‐center, longitudinal cohort study at Uppsala University Hospital, Sweden (NCT03130205 ...
Kazhan Mollazadegan, Johan Botling, Britt Skogseid, Barbro Eriksson, Lovisa Falkman, Liang Zhang, Ieva Lase, Staffan Welin, Anders Sundin, Joakim Crona   +9 more
wiley   +1 more source

Large presence of carbonic acid in CO$_2$-rich aqueous fluids under Earth's mantle conditions [PDF]

Journal of Physical Chemistry Letters 10, 5135-5141 (2019), 2019
The chemistry of carbon in aqueous fluids at extreme pressure and temperature conditions is of great importance to Earth's deep carbon cycle, which substantially affects the carbon budget at Earth's surface and global climate change. At ambient conditions, the concentration of carbonic acid in water is negligible, so aqueous carbonic acid was simply ...
arxiv   +1 more source

Biochemical and Genetic Studies of UBR3, a Ubiquitin Ligase with a Function in Olfactory and Other Sensory Systems [PDF]

, 2007
Our previous work identified E3 ubiquitin ligases, termed UBR1-UBR7, that contain the ~70-residue UBR box, a motif important for the targeting of N-end rule substrates.
Hellweg, Rainer, Hörtnagl, Heidi, Kwon, Yong Tae, Sohr, Reinhard, Tasaki, Takafumi, Varshavsky, Alexander, Xia, Zanxian   +6 more
core   +1 more source

Glioma induced alterations in fecal short-chain fatty acids and neurotransmitters

CNS Oncology, 2020
Aim: To explore fecal short-chain fatty acids and neurotransmitter alterations in a mouse–glioma model and glioma patients. Methods: Liquid chromatography–mass spectrometry and 16S rRNA-sequencing from fecal samples were performed to measure metabolite ...
Antonio Dono, Anthony Patrizz, Ryan M McCormack, Nagireddy Putluri, Bhanu P Ganesh, Balveen Kaur, Louise D McCullough, Leomar Y Ballester, Yoshua Esquenazi   +8 more
doaj   +1 more source

MRI‐based surrogates of brain clearance in narcolepsy type 1

Journal of Sleep Research, EarlyView.
Summary Brain clearance involves the drainage of waste molecules from the brain, a process that is suggested to be amplified during sleep. Recently proposed MRI‐based methods attempt to approximate human brain clearance with surrogate measures. The current study aimed to explore whether two brain clearance surrogates are altered in narcolepsy.
Eva M. van Heese, Jari K. Gool, Gert Jan Lammers, Ysbrand D. van der Werf, Matthias J. P. van Osch, Rolf Fronczek, Lydiane Hirschler   +6 more
wiley   +1 more source

Carbon Doping of MgB2 by Toluene and Malic-Acid-in-Toluene [PDF]

, 2010
The decomposition of malic acid in the presence of Mg and B was studied using Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA) which revealed that malic acid reacted with Mg but not B. Also, the addition of toluene to dissolve malic acid followed by subsequent drying resulted in no reaction with Mg, indicating that the malic
arxiv   +1 more source