Polygonum punctatum (Polygonaceae) is an herb known in some regions of Brazil as "erva-de-bicho" and is used to treat intestinal disorders. The dichloromethane extract of the aerial parts of this plant showed strong activity in a bioautographic assay with the fungus Cladosporium sphaerospermum. The bioassay-guided chemical fractionation of this extract afforded the sesquiterpene dialdehyde poly...

A practical fluorescence-labeling method for sequencing small RNAs by the traditional 'direct read out' on polyacrylamide gel electrophoresis was established. The 3' terminus of RNA was oxidized into dialdehyde by sodium periodate and then labeled with fluorescein-5-thiosemicarbazide through the condensation reaction between carbazide and aldehyde. The fluorescence-labeled RNA was partially deg...

Crossed McMurry reactions of bifuran- or bithiophenedicarbaldehydes with bipyrroledicarbaldehydes have been studied for the first time. Only those porphycenic macrocycles derived from homocoupled McMurry products were formed. The results are explained by using both density functional theory and electron propagator computations to model the electron affinity of the dialdehyde starting materials....

An efficient tandem synthesis of alkyl aryl ethers, including valuable building blocks of dialdehyde and dinitro groups under microwave irradiation and solvent free conditions on potassium carbonate as a mild solid base has been developed. A series of alkyl aryl ethers were obtained from alcohols in excellent yields by following the Williamson ether synthesis protocol under practical mild condi...

The word ethics has the same meaning as morals that a person does. Business in economic activity, what occurs this activity is exchanging, buying and selling, producing marketing, working employing, other interactions with intention of making profit. Meanwhile, Islamic business moral running accordance values, so carrying out its there no need to worry, because it believed be something good rig...

Polybenzoxazines are known to have superior thermal stability. Especially, the use of aromatic aldehydes instead formaldehyde for synthesis benzoxazines monomers could improve this However, increase in content monomer can prevent processability. The objective article is understand relationships between conformation an dialdehyde and its properties. Two benzoxazine were synthesized, based on sal...

background & aim: osmotic stress in plants lead to increase free radicals and plants use different mechanisms to scavenge these radicals. so, researchers apply stresses especially drought stress to increase secondary metabolites such as phenolics, and antioxidants. one of the valuable medicinal plants is yarrow (achillea tenuifolia) which is a perennial plant with different medicinal applic...

The aim of this study was to produce fish protein concentrate from marine Cynoglossus bilineatus, the brought local Basrah market and dried in oven at 025 °C for 06 h. chemical composition were 48.62 % (N×6.25), 19.49 fat 19.95 ash, while processed 79.56 6.38 9.51 ash. obtain yield 67.58 fish. product characterized with light brown acceptable fishy smell, also showed good strong stability after...