Sandwich-format electrochemiluminescence assay for PDGF-BB using quantum dots-dendrimer nanocomposites as probe.

This work describes a novel electrochemiluminescence aptasensor for highly sensitive detection of platelet-derived growth factor BB (PDGF-BB) using aptamer functionalized CdS quantum dots-polyamidoamine as probe (CdS QDs-PAMAM-Apt). CdS QDs-PAMAM nanocomposites were synthesized by one-pot synthesis in methanol. The prepared nanocomposites were linked with the NH2-aptamer 2 (Apt2) of PDGF-BB to form the CdS QDs-PAMAM-Apt2 probe by glutaraldehyde as coupling reagent.

A luminol electrochemiluminescence aptasensor based on glucose oxidase modified gold nanoparticles for measurement of platelet-derived growth factor BB.

A sandwich-type luminol electrochemiluminescence (ECL) aptasensor for highly sensitive and selective detection of platelet-derived growth factor BB (PDGF-BB) is fabricated. For this proposed ECL aptasensor, a multilayered AuNPs-electrochemically reduced graphene (AuNPs-EG) nanocomposite film was formed on the GCE surface as the base of the aptasensor through a co-electrodeposition method. The AuNPs-EG composites possess high conductivity to promote the electron transfer at the electrode interface and good biocompatibility and large surface area to capture large amounts of primary aptamer (Apt1), thus amplifying the detection response.

Aptasensor based on tripetalous cadmium sulfide-graphene electrochemiluminescence for the detection of carcinoembryonic antigen.

A facile label-free electrochemiluminescence (ECL) aptasensor, based on the ECL of cadmium sulfide-graphene (CdS-GR) nanocomposites with peroxydisulfate as the coreactant, was designed for the detection of carcinoembryonic antigen (CEA). Tripetalous CdS-GR nanocomposites were synthesized through a simple onepot solvothermal method and immobilized on the glassy carbon electrode surface. L-Cystine (L-cys) could largely promote the electron transfer and enhance the ECL intensity.

A novel label-free electrochemiluminescence aptasensor based on layered flowerlike molybdenum sulfide-graphene nanocomposites as matrix.

A label-free and ultrasensitive electrochemiluminescence (ECL) aptasensor was constructed for the detection of thrombin. Molybdenum sulfide-graphene nanocomposites with good conductivity and large surface area were immobilized on glassy carbon electrode (GCE), and then Nafion was fixed to chemosorb the Ru(bpy)3(2+) used as luminescence agent. Subsequently, gold nanoparticles (AuNPs) were modified on the electrode to immobilize the thiol-modified thrombin aptamer for fabrication of the thrombin aptasensor.

[Effects of coated controlled release urea combined with conventional urea on winter wheat growth and soil NO3- -N].

Field experiments were conducted to study the effects of different dosages coated controlled release urea (PCU60, 60 d release duration) combined with conventional urea (U) used as basal on the winter wheat grain yield, nitrogen (N) recovery rate, and soil NO3- -N content, etc. Five treatments were installed, i.e.

Anti-ageing effects of protocatechuic acid from Alpinia on spleen and liver antioxidative system of senescent mice.

The effects of Alpinia protocatechuic acid (PCA) on spleen and liver antioxidant system in aged rats have been studied. Alpinia PCA, a phenolic compound, was first isolated from the dried fruits of Alpinia Oxyphylla Miq. in our laboratory.

Alpinia protocatechuic acid protects against oxidative damage in vitro and reduces oxidative stress in vivo.

In this study, the neuroprotective effects of Alpinia protocatechuic acid (PCA), a phenolic compound isolated from the dried fruits of Alpinia Oxyphylla Miq. was found. The protective effect of Alpinia PCA against H2O2-induced oxidative damage on PC12 cells was investigated by measuring cell viability via 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and lactate dehydrogenase (LDH) assays.