Results 81 to 90 of about 4,632 (165)

Polymerase Chain Reaction. Perturbation Theory and Machine Learning Artificial Intelligence‐Experimental Microbiome Analysis: Applications to Ancient DNA and Tree Soil Metagenomics Cases of Study

Advanced Intelligent Systems, Volume 8, Issue 4, April 2026.
The polymerase chain reaction (PCR).Perturbation Theory and Machine Learning framework integrates perturbation theory and machine learning to classify genetic sequences, distinguishing ancient DNA from modern controls and predicting tree health from soil metagenomic data.
Jose L. Rodriguez, Estefania Ascencio, Jose M. Ageitos, Lucia Feijoo, Shan He, Amirreza Daghighi, Gerardo M. Casanola‐Martin, Cristian R. Munteanu, Santiago Rodriguez Yañez, Alejandro Pazos, Harbil Bediaga, Brenda Durand Ordiales, Raquel Esteban, Ana‐Maria Heres, Jorge Curiel Yuste, Lur Epelde, Bakhtiyor Rasulev, Tomas Gonzalez, Sonia Arrasate, Humberto González‐Diaz   +19 more
wiley   +1 more source

Seasonal nitrate drawdown transitions lake ecosystems from phosphorus to nitrogen deficiency in annual cycles

Limnology and Oceanography, Volume 71, Issue 4, April 2026.
Abstract Phytoplankton biomass is often limited by nitrogen (N) and/or phosphorus (P). Quantifying the relative availability of N and P in an ecosystem is useful in indicating nutrient limitation status. In subtropical lakes, nitrate availability generally follows a seasonal pattern with maxima in the late winter/early spring and minima in late summer ...
Jasmine K. Stovall, Nicole D. Wagner, Katelyn McKindles, Michelle Neudeck, Matthew Rich, George S. Bullerjahn, J. Thad Scott   +6 more
wiley   +1 more source

Temporal variations of biological nitrogen fixation and diazotrophic communities associated with artificial seaweed farms

Frontiers in Marine Science
Diazotrophic communities contribute inorganic nitrogen for the primary productivity of the marine environment by biological nitrogen fixation (BNF).
Pengbing Pei, Muhammad Aslam, Muhammad Aslam, Chunyou Yang, Peilin Ye, Xiao Ke, Zhanhua Liang, Tangcheng Li, Weizhou Chen, Hong Du, Hong Du   +10 more
doaj   +1 more source

Nitrogenase genes in PCR and RT-PCR reagents: implications for studies of diversity of functional genes

BioTechniques, 2003
Studies of the diversity of microorganisms in the environment have been facilitated by use of PCR and reverse transcription PCR (RT-PCR). Inhibition of the PCR by complex sample matrices and low abundance of some target microorganisms require the use of ...
Jonathan P. Zehr, Lori L. Crumbliss, Matthew J. Church, Enoma O. Omoregie, Bethany D. Jenkins   +4 more
doaj   +1 more source

Nitrogen fixation and nifH gene diversity in cyanobacteria living on feather mosses in a subalpine forest of Mt. Fuji. [PDF]

Oecologia, 2023
Kubota M, Matsushita N, Nakamura T, Fukuda K.   +3 more
europepmc   +1 more source

Endophytic Expression of nif Genes of Azoarcus sp. Strain BH72 in Rice Roots

Molecular Plant-Microbe Interactions, 1999
Transcriptional fusions of gusA and gfp to the nifH gene as well as immunogold labeling with antibodies against the iron protein of nitrogenase revealed high nitrogenase gene expression levels of the endophyte Azoarcus sp.
Tanja Egener, Thomas Hurek, Barbara Reinhold-Hurek   +2 more
doaj   +1 more source

Cloning, Prokaryotic Expression and Functional Characterization of NifH Gene from the Associative Nitrogen-Fixing Bacteria Klebsiella Variicola DX120E. [PDF]

Iran J Biotechnol, 2023
Qin Y, Huang YY, Khan Q, Zhang KK, Guo DJ, Yang LT, Li YR, Xing YX.   +7 more
europepmc   +1 more source

Diversidade de bactérias diazotróficas endofíticas associadas a plantas de milho Diversity of diazotrophic endophytic bacteria associated with maize plants

Revista Brasileira de Ciência do Solo, 2007
Bactérias diazotróficas endofíticas são capazes de promover o crescimento do milho por meio da fixação biológica do nitrogênio (FBN) ou pela produção de fitormônios.
Luiz Fernando Wurdig Roesch, Luciane Maria Pereira Passaglia, Fátima Menezes Bento, Eric W. Triplett, Flávio Anastácio Oliveira Camargo   +4 more
doaj   +1 more source

Prevalence of Deltaproteobacterial sequences in nifH gene pools associated with the rhizosphere of native switchgrass from Tall Grass Prairie (Oklahoma, USA). [PDF]

3 Biotech, 2023
Bahulikar RA.
europepmc   +1 more source

Diversity of nifH gene sequences in the sediments of South China Sea

African Journal of Microbiology Research, 2011
In order to contribute to knowledge about structure of marine diazotrophic communities in the sediments of South China Sea, the molecular diversity of the nifH gene, which encodes the Fe protein of the nitrogenase complex, was assessed by polymerase chain reaction (PCR) amplification using PolF/R primers, followed by cloning and sequencing.
openaire   +1 more source