Polyethylene glycol (PEG) 4000 is one of numerous substances used as non-absorbable markers to correct for variable faecal output when assessing daily faecal losses of nutrients. The introduction of enteric coated micro-encapsulated pancreatic enzyme (EMPE) preparations has greatly improved the control of fat malabsorption in cystic fibrosis and chronic pancreatitis patients. Unfortunately, the...

In the title compound, C(16)H(13)BrO(4), the benzene rings are almost perpendicular to each other, making a dihedral angle of 84.07 (8)°. In the crystal, the mol-ecules are linked into chains along the a axis via inter-molecular C-H⋯O hydrogen bonds. A C-H⋯π inter-action is also observed.

In the title compound, C(16)H(13)ClO(3), the dihedral angle between the benzene rings is 80.74 (8)°. In the crystal, C-H⋯O hydrogen bonds link the mol-ecules to form C(11) chains propagating in [010].

The title compound, C(16)H(13)BrO(3), consists of a toluene ring and a bromo-benzene ring which are linked together by a 2-oxopropyl acetate group. The dihedral angle formed between the toluene and bromo-benzene rings is 80.70 (7)°. In the crystal, inter-molecular C-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network.

conclusions according to achieved results, it was defined that swcnts is a quite effective adsorbent in removal of 2, 4-d from aqueous environments. results maximum adsorption capacity of the swcnts was 979.6 mg/g at ph5, contact time 45 min, initial concentration of 5000 µg/l, and 23 ± 2 ◦c temperatures, when 97.96% of 2, 4-d herbicide were removed. the adsorption equilibriums were analyzed by...