Results 41 to 50 of about 712,351 (297)

Sonogashira/N-acyliminium ion aromatic π-cyclisation processes: access to tetra- and pentacyclic lactams [PDF]

, 2008
Application of the Sonogashira reaction of N-alkynylimides with 2-iodophenol or 2-iodo-N-tosylaniline affords 2-(N-alkylimino)-benzofurans and indoles in good yield.
Grigg, R., Sridharan, V., Sykes, D.A.
core   +1 more source

Novel ionization reagent for the measurement of gas-phase ammonia and amines using a stand-alone atmospheric pressure gas chromatography (APGC) source. [PDF]

, 2020
RationaleContaminants present in ambient air or in sampling lines can interfere with the target analysis through overlapping peaks or causing a high background. This study presents a positive outcome from the unexpected presence of N-methyl-2-pyrrolidone,
Finlayson-Pitts, Barbara J, Li, Xiaoxiao, Perraud, Véronique, Smith, James N   +3 more
core   +1 more source

Characterization of Particle Size Distributions and Water-Soluble Ions in Particulate Matter Measured at a Broiler Farm

Agriculture, 2023
The chemical composition and size distribution of particulate matter produced at broiler poultry houses is not well understood, so this is a novel study to understand the particulate size distributions at a poultry house as well as the ionic composition ...
Philip J. Silva, Tanner Cress, Ryan Drover, Cara Michael, Gregory Docekal, Pierce Larkin, Antonio Godoy, Devin A. Cavero, Crystal Sin, Janise Waites, Rezaul Mahmood, Martin Cohron, Kathleen L. Purvis-Roberts   +12 more
doaj   +1 more source

Measurements of cadmium levels in relation to tobacco dependence and as a function of cytisine administration

Scientific Reports
Cigarette smoking delivers a number of heavy metals, including cadmium (Cd), into the body. Bioaccumulation may result in an increase in pathological consequences over time.
Karol Wróblewski, Julia Wojnicka, Piotr Tutka, Agnieszka Szmagara, Anna Błażewicz   +4 more
doaj   +1 more source

Ion-Exclusion/Cation-Exchange Chromatography Using Dual-Ion-Exchange Groups for Simultaneous Determination of Inorganic Ionic Nutrients in Fertilizer Solution Samples for the Management of Hydroponic Culture

Agronomy, 2021
In this study, ion-exclusion/cation-exchange chromatography (IEC/CEC) using dual-ion-exchange groups (carboxy and sulfo groups) for the simultaneous determination of anions (SO42−, Cl−, NO3−, and HPO42−) and cations (Na+, NH4+, K+, Mg2+, and Ca2+) was ...
Daisuke Kozaki, Yuki Sago, Taku Fujiwara, Masanobu Mori, Chihiro Kubono, Tougo Koga, Yuta Mitsui, Tomotaka Tachibana   +7 more
doaj   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

Simultaneous determination of chloride, bromide and iodide in foodstuffs by low pressure ion-exchange chromatography with visible light detection

Czech Journal of Food Sciences, 2011
An ion-exchange chromatography method with visible light detection was developed for the simultaneous determination of chloride, bromide, and iodide in foodstuffs.
Lingyun Yu, Xinshen Zhang, Jing Jin, Shujuan Che, Lan Yu   +4 more
doaj   +1 more source

High Resolution Chemical Stratigraphies of Atmospheric Depositions from a 4 m Depth Snow Pit at Dome C (East Antarctica)

Atmosphere, 2021
In this work, we present chemical stratigraphies of two sampling lines collected within a 4 m depth snow pit dug in Dome C during the Antarctic summer Campaign 2017/2018, 12 years after the last reported snow pit. The first sampling line was analyzed for
Laura Caiazzo, Silvia Becagli, Stefano Bertinetti, Marco Grotti, Silvia Nava, Mirko Severi, Rita Traversi   +6 more
doaj   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Preliminary investigations of plasma lipidome and selenium levels in adults with treated hypothyroidism and in healthy individuals without selenium deficiency

Scientific Reports
The present preliminary study aimed to provide a targeted lipidomic analysis of Hashimoto (HT) and non-HT patients with well-controlled hypothyroidism as well as in healthy adults, and is the first to demonstrate the association of several components of ...
Anna Błażewicz, Julia Wojnicka, Andreas M. Grabrucker, Piotr Sosnowski, Alicja Trzpil, Anna Kozub-Pędrak, Klaudia Szałaj, Agnieszka Szmagara, Ewelina Grywalska, Katarzyna Skórzyńska-Dziduszko   +9 more
doaj   +1 more source