The fate of bromine during microwave-assisted pyrolysis of waste printed circuit boards.

Bromine control is imperative for efficient treatment and products utilization during pyrolysis of waste printed circuit boards (WPCBs). This study investigated Br-species in products from microwave-assisted auger pyrolysis of WPCBs, and discussed synergetic evolution mechanisms, release kinetics and thermodynamics of Br-containing pollutants with different kinds of mineral species (alkaline earth, alkali, and transition metals). Results indicated that heavy Br-containing volatiles release (e.

X-ray excited luminescent nanoparticles for deep photodynamic therapy.

Photodynamic therapy (PDT), as a non-invasive treatment, has received wide attention because of its high selectivity and low side effects. However, traditional PDT is influenced by the excitation light source and the light penetration depth is limited, which can only be used for superficial epidermal tumor treatment, and it is still a great challenge for deep tumor treatment. In recent years, X-ray excitation photodynamic therapy (X-PDT) using penetrating X-rays as an external excitation source and X-ray excited luminescent nanoparticles (XLNP) as an energy transfer medium to indirectly excite photosensitizer (PS) has solved the problem of insufficient penetration depth in tissues and become a research hotspot in the field of deep tumor treatment.

Co-pyrolysis of dyeing sludge and pine sawdust in a fluidized bed: Characterization and analysis of pyrolytic products and investigation of synergetic effects.

Co-pyrolysis of dyeing sludge (DS) and pine sawdust (PS) was carried out in a fluidized bed pyrolyser. The results revealed that addition of PS increased the yields of condensate and gas, and dramatically improved pore structure of co-pyrolysis char, enhancing immobilization of the metals, nutrient and pollution elements. Catalysts (Na-ZSM-5 and HZSM-5) significantly reduced tar and coke, strengthened the integrity of pore structure.

Luminescent and magnetic bifunctional coordination complex based on a chiral tartaric acid derivative and europium.

A new mononuclear europium complex incorporating the (+)-di-p-toluoyl-D-tartaric acid (D-HDTTA) ligand, namely, catena-poly[tris{μ-3-carboxy-2,3-bis[(4-methylphenyl)carbonyloxy]propanoato}tris(methanol)europium(III)], [Eu(CHO)(CHOH)], (I), has been synthesized and characterized by IR spectroscopy, elemental analysis, powder X-ray diffraction and single-crystal X-ray diffraction analysis. The structure analysis indicates that complex (I) crystallizes in the trigonal space group R3 and exhibits an infinite one-dimensional chain structure, in which the Eu ion is surrounded by six O atoms from six D-HDTTA ligands and three O atoms from three coordinated methanol molecules, thus forming a tricapped trigonal prism geometry. The D-HDTTA ligand is partially deprotonated and adopts a μ-coordination mode via two carboxylate groups to link adjacent Eu ions, affording an infinite one-dimensional propeller-shaped coordination polymer chain along the c axis, with an Eu.

Studies on the effects of polydextrose intake on physiologic functions in Chinese people.

Background: Previous studies showed that polydextrose has physiologic effects similar to those of dietary fiber.

Objective: Ingestion of 4, 8, and 12 g polydextrose/d was studied to determine the physiologic effects in Chinese subjects.

Design: In a placebo-controlled, randomized, double-blind study, we evaluated the effects of polydextrose ingestion on clinical biochemistry indexes, glycated hemoglobin, glucose tolerance, the glycemic index, bowel function, stool weight and pH, short-chain fatty acid production, fecal microflora, and cecal mucosa cell proliferation.