Results 81 to 90 of about 15,004 (298)

The Association between Oral Contraceptive Pills and Subtypes of Ovarian Cancer: A Systematic Review and Meta-Analysis

open access: yesJournal of Biostatistics and Epidemiology
Introduction: Limited studies have been conducted on the effect of oral contraceptive pills on the subgroups of ovarian cancer, so we decided that conduct a systematic review and meta-analysis to investigate the effect of preventive pills on ovarian ...
Farzad Khodamoradi   +6 more
doaj   +1 more source

From Low Thrust to Solar Sailing: A Homotopic Approach [PDF]

open access: yes, 2016
This paper describes a novel method to solve solar-sail minimum-time-of-flight optimal control problems starting from a low-thrust solution. The method is based on a homotopic continuation. This technique allows to link the low-thrust with the solar-sail
Ceriotti, Matteo   +2 more
core  

Bioresorbable Mo–W Electrodes: Toward an Extended Operational Lifetime Through Controlled Alloying and Oxide Coating Engineering

open access: yesAdvanced Materials Interfaces, EarlyView.
Bioresorbable electrochemical sensors face instability in biofluids. Although alloys can mitigate rapid in vivo dissolution, Mo–W remains underexplored for sensing. This work engineers Mo–W films with a nanocrystalline oxide coating, improving stability and enabling reliable oxygen and pH sensing for up to 10 days, highlighting their potential for ...
C. Fernandes   +4 more
wiley   +1 more source

Effect of soil-groundwater system on migration and transformation of organochlorine pesticides: A review

open access: yesEcotoxicology and Environmental Safety
Soil is the place where human beings, plants, and animals depend on for their survival and the link between the various ecological layers. Groundwater is an important component of water resources and is one of the most important sources of water for ...
Haohao Li   +8 more
doaj   +1 more source

Preparation of Certified Reference Materials of Organochlorine Pesticides and Polychlorinated Biphenyls in Chinese Typical Soils

open access: yesYankuang ceshi, 2015
In China, there is only one certified reference material (CRM) of organochlorine pesticide (OCPs) and three CRMs of polychlorinated biphenyls (PCBs) in soil. Internationally, there is one CRM of OCPs and two CRMs of PCBs in soil in Europe.
TIAN Qin   +3 more
doaj   +1 more source

Printable Conductive Hydrogels for Electrochemical Biosensing and Soft Bioelectronic Interfaces

open access: yesAdvanced Science, EarlyView.
Flexible, conductive hydrogels that integrate printability, mechanical tunability, biocompatibility, and electronic performance remain challenging to achieve. Here, we develop 3D‐printable poly(ethylene glycol)–poly(pyrrole)‐ hydrogels with tissue‐like mechanics, high cytocompatibility, and robust electrochemical function.
Lukas Hein   +6 more
wiley   +1 more source

Semiconducting Polymer Nanoparticles Enable Light‐Controlled Bidirectional Modulation of Nitric Oxide in Endothelial Cells

open access: yesAdvanced Science, EarlyView.
Bimodal modulation of nitric oxide in endothelial cells is achieved by light‐sensitive polymer nanoparticles. In dark, P3HT/PEDOT:PSS NPs boost intracellular ·NO, upregulate both endothelial and induced nitric oxide synthase, and drive a metabolic shift toward glycolysis.
Camilla Marzuoli   +12 more
wiley   +1 more source

Insights Into CO2 Loss, pH Effects, and Tafel Kinetics in Ni Single Atom‐Driven Bicarbonate Electroreduction

open access: yesAdvanced Science, EarlyView.
Selective CO formation in bicarbonate electrolysis is achieved by retaining reactive CO2 and tuning pH, while the competing hydrogen evolution reaction occurs at the interface. The rate‐determining step couples the chemical equilibrium of bicarbonate/CO2 with electrochemical charge transfer, offering insight into optimizing reaction conditions for ...
Lin Li   +7 more
wiley   +1 more source

Patient Education on the Association of Hormonal Contraception with Depression [PDF]

open access: yes, 2019
Hormonal contraceptive agents are widely used by women during their reproductive years. In recent years, research has been released linking hormonal contraception with the initiation of antidepressant medication and a first diagnosis of depression.
Hannigan, Julia E
core   +1 more source

Solvation‐Mediated Shift From Solvent‐ to Anion‐Derived Solid Electrolyte Interphases for Stable Calcium Metal Anodes

open access: yesAdvanced Science, EarlyView.
An ion‐dipole interaction based strategy is proposed to capture thermodynamically unstable solvents and restructure the coordination environment of calcium ions by introducing ionic liquid co‐solvents, thus suppressing excessive solvent decomposition. Therefore, a smooth and dense solid‐electrolyte interphase dominated by inorganic components is formed
Yunyun Gao   +7 more
wiley   +1 more source

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