Specific dual-mode fluorometric and colorimetric detection of nitrite based on oxidase-like activity of carbon dots/iron alkoxide composite.

Trace detection of nitrite in food has gained increasing attention due to its connection with biological and environmental processes. Herein, a dual-mode fluorometric/colorimetric sensor is established for nitrite detection by combining the oxidase-like activity of iron alkoxide (IA) with the bimodal excitation properties of nitrogen-doped carbon dots (N-CDs). IA oxidizes the colorless 3,3',5,5'-tetramethylbenzidine into blue-colored 3,3',5,5'-tetramethylbenzidine oxide.

Triggering cascade detection of rutin and Al via 3D ratiometric fluorescent probe through lateral flow assay installation based on dual-emission carbon dots.

The persistent existence of flavonoid medications and hazardous ion residues continue to be a concern. Herein, a novel 3D cascade nitrogen-doped carbon dots (N-CDs) based sensing platform for specific detection of rutin and Al has been developed, utilizing 3,3-diaminobenzidine and catechol as precursors through solvothermal way. The N-CDs exhibit a blue emission peak at 410 nm and a green emission peak at 518 nm.

Two birds with one stone: one-step preparation of fluorine-doped CDs with sensitive sensing of copper and visualization of latent fingerprints.

Fluorine-doped carbon dots (F-CDs) are prepared through a one-pot hydrothermal method starting from ciprofloxacin, exhibiting a bright blue emission at 453 nm under the optical wavelength of 358 nm. The sensitive sensor for detecting Cu is established based on the fluorescence quenching of F-CDs, which is attributed to the static quenching caused by the formation of non-luminescent complexes between them. The limit of detection (LOD) is 46.

Centrifugated lateral flow assay strips based on dual-emission carbon dots modified with europium ions for ratiometric determination and on-site discrimination of tetracyclines in environment.

Due to the serious detrimental impact on human health, antibiotic pollution particularly tetracyclines residues has become a serious problem. Herein, a multiple response fluorescent probe consisted of dual-emission carbon dots and Eu (D-CDs@Eu) is designed for the determination and discrimination of tetracyclines (TCs). Specifically, the carboxyl and amidogen group of dual-emission carbon dots (D-CDs) can coordinate with Eu to form the D-CDs@Eu.

Equity and Justice in Family Medicine Clinical Care and Teaching Must Incorporate a Reproductive Justice Framework.

Since European settlement, the United States has controlled the reproduction of communities of color through tactics ranging from forced pregnancies, sterilizations, and abortions to immigration policies and policies that separate children from their families. Lesbian, gay, bisexual, transgender, queer (or questioning), asexual, intersex, and gender diverse people (LGBTQIA+) have been persecuted for sexual behavior and gender expression, and also restricted from having children. In response, women of color and LGBTQIA+ communities have organized for Reproductive Justice (RJ) and liberation.

3D printing-based lateral flow visual assay utilizing the dual-excitation property of nitrogen-doped carbon dots for the ratiometric determination and chemometric discrimination of flavonoids.

A ratiometric fluorescence sensor has been established based on dual-excitation carbon dots (D-CDs) for the detection of flavonoids (morin is chosen as the typical detecting model for flavonoids). D-CDs were prepared using microwave radiation with o-phenylenediamine and melamine and exhibit controllable dual-excitation behavior through the regulation of their concentration. Remarkably, the short-wavelength excitation of D-CDs can be quenched by morin owing to the inner filter effect, while the long-wavelength excitation remains insensitive, serving as the reference signal.

A sensitive lateral flow test strip sensor for visual detection of acid red 18 in food using bicentric-emission carbon dots.

Hazardous synthetic colorants have found widespread use in food production, and excessive consumption of these pigments can pose potential risks to human health. In this study, we propose an ultrasensitive fluorescence method for the analysis of Acid Red 18 (AR18) in food products. The method is based on the nitrogen-doped carbon dots (N-CDs) derived from tris and resorcinol through a hydrothermal way.

Construction of fluorescent sensor array and three-dimensional microfluidic paper based analytical device for specific identification and visual determination of antibiotics in food.

For antibiotics misuse since the global outbreak of COVID 19, a novel strategy for discriminating and detecting antibiotics is proposed based on the graphene quantum dots with multi-doped heteroatoms including F, N and P (M-GQDs), which exhibit blue emission (419.0 nm) under the excitation of 336.0 nm.

Energy transfer mediated rapid and visual discrimination of tetracyclines and quercetin in food by using N, Cu Co-doped carbon dots.

The appearance of multi-drug resistant Escherichia coli makes the combination of tetracyclines (TCs) and quercetin (QCT) more common to fight stubborn bacterial infections so that the effective detections of TCs and QCT are essential and necessary. Here, a novel fluorescence probe for differentiating TCs and QCT is developed based on the nitrogen and copper co-doped carbon dots (N, Cu-CDs). The N, Cu-CDs are prepared from ethylene diamine tetraacetic acid (EDTA) and anhydrous copper chloride as precursors through hydrothermal process and exhibit bright blue fluorescence with excellent optical stability.

Family planning and contraception use in transgender men.

Objectives: Female-to-male (FTM) transgender men (affirmed males) can experience planned and unplanned pregnancy during and after testosterone therapy. We conducted an exploratory study to understand current contraceptive practices and fertility desires among transgender men during and after transitioning.

Study Design: Self-identified transgender and transmasculine individuals assigned female at birth, ages 18-45, completed an anonymous online survey derived from standardized family planning surveys.

Racial and ethnic differences in contraception use and obstetric outcomes: A review.

In the United States, racial and ethnic minority women experience higher rates of contraceptive non-use, failure, unintended pregnancy, and lower use of long-acting reversible contraception (LARC), compared to whites. Simultaneously researchers have found that unintended pregnancy is associated with poor pregnancy outcomes and pregnancy behaviors, including pre-term birth and late initiation of prenatal care, respectively. Due to the association of pregnancy intention and obstetrical outcomes, public health efforts have focused on the increase in contraception use among these populations as a way to decrease poor pregnancy outcomes.

Service provider perspectives on post-abortion contraception in Nepal.

The government of Nepal has articulated a commitment to the provision of post-abortion contraception since the implementation of a legal safe abortion policy in 2004. Despite this, gaps in services remain. This study examined the perspectives of abortion service providers and administrators regarding strengths and shortcomings of post-abortion contraceptive service provision.

The accuracy of using last menstrual period to determine gestational age for first trimester medication abortion: a systematic review.

Objective: We sought to evaluate the accuracy of assessing gestational age (GA) prior to first trimester medication abortion using last menstrual period (LMP) compared to ultrasound (U/S).

Study Design: We searched Medline, Embase and Cochrane databases through October 2013 for peer-reviewed articles comparing LMP to U/S for GA dating in abortion care. Two teams of investigators independently evaluated data using standard abstraction forms.