Results 1 to 10 of about 22,356,954 (294)

Elemental analysis by NMR [PDF]

Journal of Magnetic Resonance, 2012
We explore the possibility for elemental analysis by NMR. To keep the efficiency of the signal acquisition common for all spin species, we propose to fix the frequency and vary the magnetic field to cover the isotopes involved in a sample. We introduce constant-frequency receptivity for quantitative elemental analysis in the frequency-fixed NMR ...
Takeda, Kazuyuki, Ichijo, Naoki, Noda, Yasuto, Takegoshi, K   +3 more
openaire   +4 more sources

Airborne soil and dust are potential sources of antimony to residents across Delhi: Exposure likely to occur via dermal route

Hygiene and Environmental Health Advances, 2023
Background: There is an urgent need to assess sources of toxic metals in highly urbanized environments, to identify high risk areas for testing to enable planning to minimize exposure to residents.
Manoj P. Singh, Saroj Bhattacharyya, Khorshed Chinu, Rabeya Akter, Christopher E. Marjo   +4 more
doaj   +1 more source

Preformulation Studies of Ezetimibe-Simvastatin Solid Dispersions in the Development of Fixed-Dose Combinations

Pharmaceutics, 2022
Two active pharmaceutical ingredients (APIs) with limited solubility, simvastatin and ezetimibe, prepared as a drug-drug solid dispersion (SD) was evaluated for physicochemical, microstructural, and aqueous dissolution properties.
Agata Górniak, Adrianna Złocińska, Mateusz Trojan, Adrianna Pęcak, Bożena Karolewicz   +4 more
doaj   +1 more source

Direct Calibration Method for LA-HR-ICP-MS Apatite U-Pb Dating

Yankuang ceshi, 2022
BACKGROUND Apatite is a common U-bearing accessory mineral with a U-Pb closure temperature of ~500℃, making U-Pb dating of apatite a potentially valuable thermochronometer.
ZHAO Linghao, ZHAN Xiuchun, ZENG Lingsen, HU Mingyue, SUN Dongyang, YUAN Jihai   +5 more
doaj   +1 more source

Screening of Fenofibrate-Simvastatin Solid Dispersions in the Development of Fixed-Dose Formulations for the Treatment of Lipid Disorders

Pharmaceutics, 2023
The combination of statins and fibrates in the treatment of lipid abnormalities effectively regulates individual lipid fraction levels. In this study, the screening and assessment of the physicochemical properties of simvastatin-fenofibrate solid ...
Agata Górniak, Hanna Czapor-Irzabek, Adrianna Złocińska, Agnieszka Gawin-Mikołajewicz, Bożena Karolewicz   +4 more
doaj   +1 more source

Vertical and spatial evaluation of the groundwater chemistry in the Central Nile Delta Quaternary aquifer to assess the effects of human activities and seawater intrusion

Frontiers in Environmental Science, 2022
Contaminants can be found in the groundwater through natural processes, such as seawater intrusion, or due to human activities that can adversely affect the quantity, quality, and distribution of the groundwater. In order to assess the influence of human
Zenhom E. Salem, Abdelaziz ElNahrawy, Abdullah M. Attiah, Joshua N. Edokpayi   +3 more
doaj   +1 more source

Evaluation of the Influence of a Hydrogel Containing AMPD on the Stability of Tetracycline Hydrochloride

Pharmaceutics, 2021
Tetracyclines, as beneficial antimicrobial factors in both local and systemic therapy, are characterized by high instability. The aim of the study was the development of the influence of hydrogel formulation on the tetracycline hydrochloride (TC) level ...
Agnieszka Kostrzębska, Adrianna Złocińska, Witold Musiał   +2 more
doaj   +1 more source

Biotic Element Analysis in Biogeography [PDF]

Systematic Biology, 2003
Biotic element analysis is an alternative to the areas-of-endemism approach for recognizing the presence or absence of vicariance events in a given region. If an ancestral biota was fragmented by vicariance events, biotic elements or clusters of distribution areas should emerge.
Hausdorf, Bernhard, Hennig, Christian
openaire   +3 more sources

Diet and life history reduce interspecific and intraspecific competition among three sympatric Arctic cephalopods

Scientific Reports, 2020
Trophic niche and diet comparisons among closely sympatric marine species are important to understand complex food webs, particularly in regions most affected by climate change.
Alexey V. Golikov, Filipe R. Ceia, Rushan M. Sabirov, Georgii A. Batalin, Martin E. Blicher, Bulat I. Gareev, Gudmundur Gudmundsson, Lis L. Jørgensen, Gazinur Z. Mingazov, Denis V. Zakharov, José C. Xavier   +10 more
doaj   +1 more source

Sustainable Production of 5-Hydroxymethylfurfural from Pectin-Free Sugar Beet Pulp in a Simple Aqueous Phase System-Optimization with Doehlert Design

Energies, 2020
Waste solid residue from the hydrothermal extraction of pectin derived from sugar beet pulp was used as feedstock in the production of 5-hydroxymethylfurfural (5-HMF).
Hanna Pińkowska, Małgorzata Krzywonos, Paweł Wolak, Przemysław Seruga, Agata Górniak, Adrianna Złocińska, Michał Ptak   +6 more
doaj   +1 more source