Results 151 to 160 of about 1,766,427 (312)

Development and validation of a thinking skills test for high school students in biology

open access: yes, 1999
This study develops and validates a test which measured the thinking skills of second year high school students in biology. It also seeks to identify the characteristics of the developed test in terms of its validity and reliability and, the norms of the
Lim, Florentina C.
core  

Pre‐analytical optimization of cell‐free DNA and extracellular vesicle‐derived DNA for mutation detection in liquid biopsies

open access: yesMolecular Oncology, EarlyView.
Pre‐analytical handling critically determines liquid biopsy performance. This study defines practical best‐practice conditions for cell‐free DNA (cfDNA) and extracellular vesicle–derived DNA (evDNA), showing how processing time, storage conditions, tube type, and plasma input volume affect DNA integrity and mutation detection.
Jonas Dohmen   +11 more
wiley   +1 more source

EDNRB‐dependent endothelin signaling reduces proliferation and promotes proneural‐to‐mesenchymal transition in gliomas

open access: yesMolecular Oncology, EarlyView.
Glioma cells mainly express the endothelin receptor EDNRB, while EDNRA is restricted to a perivascular tumor subpopulation. Endothelin signaling reduces glioma cell proliferation while promoting migration and a proneural‐to‐mesenchymal transition associated with poor prognosis. This pathway activates Ca2+, K+, ERK, and STAT3 signalings and is regulated
Donovan Pineau   +36 more
wiley   +1 more source

Crossword: Test your Biology!

open access: yes
Biology themed Crossword ...
Weinger, Sukie
core  

Nonparametric statistical test approaches in genetics data

open access: yes, 2016
The biggest challenge of genetic research lies in significant and intellectual analysis of the large and complex data sets generated by the cutting edge techniques like massively parallel DNA sequencing and genome wide analysis.
Saroj, RAKESH Kumar; Department of Kayachikitsa Institute of Medical Sciences,Banaras Hindu University   +2 more
core  

Empirical Analysis of Item Difficulty and Discrimination Indices of Senior School Certificate Multiple Choice Biology Tests

open access: yesAsian Journal of Assessment in Teaching and Learning, 2016
This study empirically analyzed the item difficulty and discrimination indices of senior school certificate examination SSCE multiple choice biology tests used by West African Examinations Council and National Examinations Council in Nigeria.
OLUTOLA -, Adekunle Thomas
doaj  

Engineered extracellular vesicles enriched with the miR‐214/199a cluster enhance the efficacy of chemotherapy in ovarian cancer

open access: yesMolecular Oncology, EarlyView.
Loss of the miR‐214/199a cluster is associated with recurrence in ovarian cancer. Engineered small extracellular vesicles (m214‐sEVs) elevate miR‐214‐3p/miR‐199a‐5p in tumor cells, suppress β‐catenin, TLR4, and YKT6 signaling, reprogram tumor‐derived sEV cargo, reduce chemoresistance and migration, and enhance carboplatin efficacy and survival in ...
Weida Wang   +12 more
wiley   +1 more source

Interrogating the immune landscape of microsatellite stable RAS‐mutated colon cancer

open access: yesMolecular Oncology, EarlyView.
COLOSSUS project RAS‐mutated MSS colon cancer study explored transcriptomics and immune cell density by immunohistochemistry (IHC), Immunoscore (IS), ISIC/TuLIS scores, mutation counts, and detected different prevalences but similar microenvironment composition across immune markers with clinical relevance for future immunotherapy combination ...
Rodrigo Dienstmann   +61 more
wiley   +1 more source

A CURE for synthetic regulation of gene expression: rapid screening of guide RNA efficacy as a framework for enabling undergraduate research in plant synthetic biology. [PDF]

open access: yesSynth Biol (Oxf)
Bull T   +22 more
europepmc   +1 more source

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