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Mediolateral episiotomy and obstetric anal sphincter injuries in nullipara: a propensity score matching study.
BMC Pregnancy Childbirth
January 2025
Helen Schneider Hospital for Women, Rabin Medical Center, 39 Jabotinsky Street, Petach Tikva, 4941492, Israel.
Background: Obstetric anal sphincter injuries are a notable adverse outcome of vaginal deliveries, with incidence rates ranging from 0.25% to 6%. Key risk factors for these injuries include primiparity and operative vaginal deliveries.
View Article and Find Full Text PDFA study on red potato peel ( Red Holland): characterization, composition and formulation of tablet using different drying techniques.
J Food Sci Technol
January 2025
Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi, U.P. 221005 India.
Unlabelled: Potato peels are one of the most under-utilized wastes which can be highly beneficial to mankind. The red potato peel powder was prepared by using tray drying and vacuum-oven drying method. The proximate analysis of red potato peel powder was conducted followed by its characterization which includes FT-IR, XRD, TGA, DSC, and SEM.
View Article and Find Full Text PDFA Vacuum Ultraviolet (UV) Photoreactor-Based Flow Droplet Digestion for Determination of Arsenic and Mercury in Blood by Atomic Fluorescence Spectrometry.
Anal Chem
January 2025
Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan610064, China.
It is still challenging to perform a high-throughput digestion on limited amounts of sample prior to elemental analysis by atomic spectrometry. Herein, a photochemical reactor consisting of a quartz tube inserted into a low-pressure mercury lamp was used to fabricate a flow droplet photodigestion (FD-PD) device for the high-throughput digestion of small amounts of samples. A mixture containing 20 μL of blood sample, 20 μL of HO, and 10 μL of HNO was pumped and passed through the reactor before its online analysis by hydride generation atomic fluorescence spectrometry (HG-AFS).
View Article and Find Full Text PDFA Hybrid Vacuum Flange RF Oscillator for Low-Cost Mass Spectrometry.
J Am Soc Mass Spectrom
January 2025
Mund-Lagowski Department of Chemistry and Biochemistry, Bradley University, Peoria, Illinois 61625, United States.
In this communication we report the construction of a printed circuit board which mounts directly to the vacuum chamber of a mass spectrometer and produces the RF waveforms needed by many nonmass-selective devices such as ion guides and ion funnels. Our device is designed to replace a standard KF40 flange, can maintain vacuum chamber pressures of less than 10 Torr, and contains the circuitry of the open-source Wisconsin Oscillator RF power supply to generate RF waveforms of 1-4 MHz and up to 200 V. In this iteration of the Wisconsin Oscillator, we also introduce a variable resistor to control the output RF amplitude and show that its ion transmission capabilities are identical to those provided by commercial RF power supplies.
View Article and Find Full Text PDFMechanistic Understanding of Dissociated Hydrogen in Cu/CeO-Catalyzed Methanol Synthesis.
ACS Appl Mater Interfaces
January 2025
School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China.
The hydrogen dissociation and spillover mechanism on oxide-supported Cu catalysts play a pivotal role in the hydrogenation of carbon dioxide to methanol. This study investigates the hydrogen spillover mechanism on Cu/CeO catalysts using spectral characterization under high-pressure reaction conditions and density functional theory (DFT) simulations. The research confirms that the Cu sites serve as the initial dissociation points for the hydrogen molecules.
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