California State University (CSU): Open Journal Systems
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Algebraic Enumeration of Polypolyhedra
Get PDFPolypolyhedra are edge-transitive compounds of polyhedra. In this paper we use group theory to determine the number of distinct polypolyhedra whose symmetry group is any given finite irreducible Coxeter group. We apply this result in order to enumerate the 3-dimensional polypolyhedra
The Effect of Nitrogen on the Growth Rate of the Invasive Species Brassica nigra
Get PDFBrassica nigra is an invasive species of mustard that is growing in California. Recent studies have shown that B. nigra is invading nitrogen (N) rich plots1 displacing native shrubs. Similar studies have shown N addition increases plant productivity2 and N uptake3 of alien plants. Brassica nigra exposed to high levels of N had higher biomass production than plants growing in low N (control) plots. The increase in biomass production was due to shoot growth and reproductive output in plants exposed to N. Plants exposed to N had higher tissue N concentration than control plants during the growth phase, but N resources became diluted at the end of the season by the higher shoot production. These data indicate that the invasive species, Brassica nigra, can become invasive in high N environments because of high shoot and reproductive biomass production. These results have important implications for species diversity in chaparral ecosystems exposed to high levels of N deposition
Rumen Microbiome Gene CJD5-110 Encodes A Cellulase
Get PDFClimate change, primarily propelled by fossil fuel combustion and resulting greenhouse gas emissions, poses a significant threat to the environment. In response to this challenge, bioethanol has emerged as a promising alternative to conventional fuels due to its renewable nature and reduced carbon footprint. The pivotal step in bioethanol production involves the enzymatic hydrolysis of cellulose, a constituent of plant cell walls. The objective of this study was to discover novel cellulase genes from cellulolytic bacteria present in the cow\u27s rumen. The target gene, CJD5-110, was initially isolated from the cow\u27s rumen, and upon sequencing, it was identified to originate from Lachnospiraceae Bacterium, commonly found in the intestinal microbiota of humans and mammals. Subsequently, the gene of interest, CJD5-110, was integrated into a vector and transformed into E. coli BL 21 cells. The protein extract derived from these E. coli cells, containing the CJD5-110 gene, demonstrated the ability to degrade cellulose. In conclusion, our study successfully identified the gene CJD5-110 as a novel cellulase gene