Microbial succession and its correlation with the dynamics of flavor compounds involved in the fermentation of Longxi bacon.

Introduction: Longxi bacon is a traditional fermented meat from Gansu province, China. The ripening process of the bacon is crucial for quality and flavor. The aim of this study was to gain deeper knowledges on the bacterial and fungal community diversity and the changes of chemical components including fatty acids and volatile compounds at different time points during the ripening of the bacon and to understand the relationship between microbial profiles and the chemical components related the bacon flavor.

Two novel cationic antifungal peptides isolated from Bacillus pumilus HN-10 and their inhibitory activity against Trichothecium roseum.

Public concern for food safety and environmental issues and the increase in fungicide-resistant pathogen have enhanced the interest in developing alternative methods to fungicides to control postharvest fruit decay. In this study, a bacterial strain isolated from stale potato vermicelli was identified as Bacillus pumilus HN-10 based on morphological characteristics and 16S rRNA gene sequence analysis. Furthermore, two novel cationic antifungal peptides named P-1 and P-2 were purified from B.

Enhanced β-galactosidase production of Aspergillus oryzae mutated by UV and LiCl.

In order to breed a high-yield β-galactosidase-producing strain, Aspergillus oryzae was used as the parent strain and mutagenized with ultraviolet (UV) and UV plus lithium chloride (LiCl), respectively. After being mutagenized by UV, the β-galactosidase activity of mutant UV-15-20 reached 114.08 U/mL, which revealed a 49.

Analysis of compensatory substitution and gene evolution on the MAGEA/CSAG-palindrome of the primate X chromosomes.

The human X chromosome contains a large number of inverted repeat DNA palindromes. Although arbitrary substitutions destroyed the inverted repeat structure of MAGEA/CSAG-palindrome during the evolutionary process of the primates, most of the substitutions are compensatory. Using maximum parsimony, it is demonstrated that the compensatory substitutions are prone to occur between bases with similar structures on the human, chimpanzee and orangutan MAGEA/CSAG-palindromes.

Wavelet analysis of DNA walks on the human and chimpanzee MAGE/CSAG-palindromes.

The palindrome is one class of symmetrical duplications with reverse complementary characters, which is widely distributed in many organisms. Graphical representation of DNA sequence provides a simple way of viewing and comparing various genomic structures. Through 3-D DNA walk analysis, the similarity and differences in nucleotide composition, as well as the evolutionary relationship between human and chimpanzee MAGE/CSAG-palindromes, can be clearly revealed.