Results 81 to 90 of about 346,397 (348)

First descriptions of copepodid stages, sexual dimorphism and intraspecific variability of Mesocletodes Sars, 1909 (Copepoda, Harpacticoida, Argestidae), including the description of a new species with broad abyssal distribution [PDF]

open access: yes, 2011
Mesocletodes Sars, 1909a encompasses 37 species to date. Initial evidence on intraspecific variability and sexual dimorphism has been verified for 77 specimens of Mesocletodes elmari sp. n. from various deep-sea regions, and ontogenetic development has
Menzel, Lena
core   +3 more sources

Gut Bacteria Improve Depressive Symptoms by Degrading Cortisol into Androgen

open access: yesAdvanced Science, EarlyView.
Chronic stress is an important risk factor for stress‐related disorders such as depression. Stress hormone cortisol is essential for the pathogenesis of stress‐related disorders such as depression. Some gut microbiota degraded cortisol, and improve depressive symptoms.
Xiong Wang   +12 more
wiley   +1 more source

Biology, ecology, and taxonomy of insects infesting acorns [PDF]

open access: yes, 1960
This bulletin is based on the thesis presented by Jerome Brezner in partial fulfillment of the requirements for a Doctor of Philosophy degree, June, 1959. It reports on Department of Entomology research project 294, Acorn Insects--P.
Brezner, Jerome, 1931-
core  

Unveiling Global Diversity of Patescibacteriota and Functional Interactions with Host Microbes

open access: yesAdvanced Science, EarlyView.
Patescibacteriota represents a diverse group of ultra‐small epibiotic bacteria, which is largely overlooked. By integrating ribosomal protein S3‐based community profiling with MAG‐based metabolic potential analyses, this study provides new insights into their distribution, diversity, and potential interactions with other bacteria across diverse ...
Yanhan Ji   +12 more
wiley   +1 more source

ranacapa: An R package and Shiny web app to explore environmental DNA data with exploratory statistics and interactive visualizations. [PDF]

open access: yes, 2018
Environmental DNA (eDNA) metabarcoding is becoming a core tool in ecology and conservation biology, and is being used in a growing number of education, biodiversity monitoring, and public outreach programs in which professional research scientists engage
Cowen, Madeline C   +9 more
core  

The use of computer-based assessments in a field biology module [PDF]

open access: yes, 2007
Formative computer-based assessments (CBAs) for self-instruction were introduced into a Year-2 field biology module. These CBAs were provided in ‘tutorial’ mode where each question had context-related diagnostic feedback and tutorial pages, and a self ...
Baggott, Glenn K., Rayne, Richard C.
core   +1 more source

Two Novel S‐methyltransferases Confer Dimethylsulfide Production in Actinomycetota

open access: yesAdvanced Science, EarlyView.
This study identifies two novel S‐adenosine‐methionine‐dependent methyltransferases, MddM1 and MddM2, in actinomycetes from the Mariana Trench. These enzymes can convert toxic hydrogen sulfide (H2S) and methanethiol (MeSH) into dimethylsulfide (DMS), serving as a cellular detoxification and oxidative stress response.
Ruihong Guo   +11 more
wiley   +1 more source

Utility of mitochondrial DNA in wildlife forensic science: reliable identification of confiscated materials from Eastern India

open access: yesMitochondrial DNA. Part B. Resources, 2019
The poachers adopted various cunning ways to modify the wildlife materials before commercialization. Thus, the confiscated wildlife materials is often a crime with no eyewitness and difficult for identification.
Vikas Kumar   +7 more
doaj   +1 more source

Biological research of Grabia River - fifty years of activity [PDF]

open access: yes, 2005
Grabia, a small still close to natural conditions lowland river, has been an object of special interest for Łódź hydrobiologists for more than 50 years.
Siciński, Jacek, Tończyk, Grzegorz
core  

Finding needles in haystacks: linking scientific names, reference specimens and molecular data for Fungi [PDF]

open access: yes, 2014
DNA phylogenetic comparisons have shown that morphology-based species recognition often underestimates fungal diversity. Therefore, the need for accurate DNA sequence data, tied to both correct taxonomic names and clearly annotated specimen data, has ...
Abarenkov, K   +100 more
core   +2 more sources

Home - About - Disclaimer - Privacy