Results 41 to 50 of about 4,422,072 (371)

On Graphs, Groups and Geometry [PDF]

open access: yesarXiv, 2022
A metric space (X,d) is declared to be natural if (X,d) determines an up to isomorphism unique group structure (X,+) on the set X such that all the group translations and group inversion are isometries. A group is called natural if it emerges like this from a natural metric.
arxiv  

On the cohomology algebra of free loop spaces [PDF]

open access: yes, 2001
Let $X$ be a simply connected space and $\Bbb K$ be any field. The normalized singular cochains $N^*(X; {\Bbb K})$ admit a natural strongly homotopy commutative algebra structure, which induces a natural product on the Hochschild homology $HH_* N^*X$ of ...
Ndombol, Bitjong, Thomas, Jean-Claude
core   +3 more sources

Analysis of food supplement with unusual raspberry ketone content [PDF]

open access: yes, 2016
In recent years food supplement market increased constantly, including slimming products and against obesity. The case of rasberry ketone (RK) is here reported.
Foddai, S.   +6 more
core   +1 more source

Scalemic natural products

open access: yesNatural Product Reports, 2023
In natural products, a low optical purity is not generally associated with a sloppy enzymatic activity, but rather with the co-expression of antipodal enzymes/directing proteins or, alternatively, with erosion by enzymatic or spontaneous reactions.
Mazzotta, Sarah   +5 more
openaire   +2 more sources

A new high-performance heterologous fungal expression system based on regulatory elements from the Aspergillus terreus terrein gene cluster

open access: yesFrontiers in Microbiology, 2015
Recently, the Aspergillus terreus terrein gene cluster was identified and selected for development of a new heterologous expression system. The cluster encodes the specific transcription factor TerR that is indispensable for terrein cluster induction. To
Markus eGressler   +4 more
doaj   +1 more source

Intertwinors on Functions over the Product of Spheres [PDF]

open access: yes, 2011
We give explicit formulas for the intertwinors on the scalar functions over the product of spheres with the natural pseudo-Riemannian product metric using the spectrum generating technique.
Hong, Doojin
core   +3 more sources

Antimicrobial Natural Products

open access: yesAntibiotics, 2022
Infectious diseases, resulting from microbial pathogens, are one of the major causes of morbidity and mortality worldwide [...]
openaire   +3 more sources

Microbial communication leading to the activation of silent fungal secondary metabolite gene clusters

open access: yesFrontiers in Microbiology, 2015
Microorganisms form diverse multispecies communities in various ecosystems. The high abundance of fungal and bacterial species in these consortia results in specific communication between the microorganisms.
Tina eNetzker   +13 more
doaj   +1 more source

Zappa-Sz\'ep product groupoids and C*-blends [PDF]

open access: yes, 2016
We study the external and internal Zappa-Sz\'ep product of topological groupoids. We show that under natural continuity assumptions the Zappa-Sz\'ep product groupoid is \'etale if and only if the individual groupoids are \'etale.
Brownlowe, Nathan   +4 more
core   +2 more sources

Lactic Acid Bacteria Isolates and the Microbiome of Cincalok, Tempoyak, and Mandai: A Traditional Fermented Food from Kalimantan Island, Indonesia

open access: yesInternational Journal of Food Science
Indonesia has abundant traditional fermented food with various lactic acid bacteria (LAB), which can be developed into probiotics for pharmaceutical and functional food and feed products.
Retno Murwani   +6 more
doaj   +1 more source

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