A sperm cryopreservation protocol requiring dimethylacetamide (DMA, 6%) as a cryoprotectant was optimized via assays involving different prefreezing equilibration times (1, 10, 30, 60, and 120 min at 5°C) and different freezing rates achieved by the following: 1) using nitrogen vapor to reduce the temperature from 5°C to -85°C at 10°C/min (slow freezing rate); 2) using a biological freezer unit...

The Front Cover illustrates the photocatalytic reduction of CO2 to CO by an aniline-substituted Re-bipyridine-type photocatalyst in presence a strong electron donor (1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]-imidazole=BIH) N,N-dimethylacetamide. This catalyst absorbs visible light intensely compared related catalysts, and aniline moiety has beneficial effect on activity. More information ca...

polyimide/nickel oxide (polyimide/nio) nanocomposite was successfully synthesized by sol gel technique, using pyromellitic dianhydriede (pmda), 4,4-oxydianiline (oda) and n,n-dimethylacetamide (dmac) and 10 wt% nickel titanate nanopowders (nps). fourier transform infrared spectrometry (ftir), x-ray diffraction (xrd), scanning electron microscopy (sem), and vibrating sample magnetometer (vsm) we...

AIMS To study the concentration of N,N-dimethylacetamide (DMA) and its metabolite, N-methylacetamide (NMA), in urine of workers occupationally exposed to DMA in a factory producing synthetic acrylic fibres. METHODS During the first phase, 223 workers exposed to low environmental concentrations of DMA provided urine samples at the end of a work shift. High concentrations of the unmodified solv...