Results 21 to 30 of about 2,587,577 (305)

Cucurbitacins from the Leaves of Citrullus colocynthis (L.) Schrad

open access: yesMolecules, 2015
Two new tetracyclic cucurbitane-type triterpene glycosides were isolated from an ethyl acetate extract of Citrullus colocynthis leaves together with four known cucurbitacins.
Rachid Chawech   +7 more
doaj   +1 more source

Experimental study on dynamic response characteristics of isolated‐span transmission lines after ice‐shedding

open access: yesHigh Voltage, 2023
The dynamic response characteristics, including maximum jump height and unbalanced tension, of isolated‐span transmission lines after ice‐shedding are investigated by means of experiments.
Guizao Huang   +4 more
doaj   +1 more source

Neopapillarine, an Unusual Coumarino-Alkaloid from the Root Extract of Neocryptodiscus papillaris with Cytotoxic Activity on Renal Cancer Cells

open access: yesMolecules, 2020
Several simple and prenylated coumarin derivatives were isolated from the dichloromethane extract of the root of Neocryptodiscus papillaris based on moderate cytotoxic activity of the extract in COLO205, KM12 and MCF7 cancer cells.
Fatma Tosun   +4 more
doaj   +1 more source

APLNR marks a cardiac progenitor derived with human induced pluripotent stem cells

open access: yesHeliyon, 2023
Cardiomyocytes can be readily derived from human induced pluripotent stem cell (hiPSC) lines, yet its efficacy varies across different batches of the same and different hiPSC lines.
Yin-Yu Lam   +5 more
doaj   +1 more source

The Magnificent Seven: Magnetic fields and surface temperature distributions [PDF]

open access: yes, 2006
Presently seven nearby radio-quiet isolated neutron stars discovered in ROSAT data and characterized by thermal X-ray spectra are known. They exhibit very similar properties and despite intensive searches their number remained constant since 2001 which ...
A. Treves   +64 more
core   +2 more sources

Electron Collisional Broadening of Isolated Lines from Multiply-Ionized Atoms [PDF]

open access: yes, 1999
Recent experimental and theoretical (both improved semiclassical and fully quantum-mechanical) results for B III and Ne VII delta n = 0 transitions with n = 2 or 3, respectively, are discussed.
Ahmad   +42 more
core   +3 more sources

Three New Cytotoxic ent-Kaurane Diterpenes from Isodon excisoides

open access: yesMolecules, 2015
Three types of ent-kaurane diterpenoids were isolated from the aerial parts of Isodon excisoides, including three new diterpenoids, 1α,7α,14β-trihydroxy-20-acetoxy-ent-kaur-15-one (1); 1α,7α,14β,18-tetrahydroxy-20-acetoxy-ent-kaur-15-one (2); and 1α ...
Li-Ping Dai   +6 more
doaj   +1 more source

On the nature of reconnection at a solar coronal null point above a separatrix dome [PDF]

open access: yes, 2013
Three-dimensional magnetic null points are ubiquitous in the solar corona, and in any generic mixed-polarity magnetic field. We consider magnetic reconnection at an isolated coronal null point, whose fan field lines form a dome structure.
Galsgaard, K.   +2 more
core   +3 more sources

High efficiency transfection of thymic epithelial cell lines and primary thymic epithelial cells by Nucleofection [PDF]

open access: yes, 2011
Thymic epithelial cells (TECs) are required for the development and differentiation of T cells and are sufficient for the positive and negative selection of developing T cells.
Brian G. Condie   +2 more
core   +2 more sources

Growth Inhibitory Effect of Palatine Tonsil-derived Mesenchymal Stem Cells on Head and Neck Squamous Cell Carcinoma Cells [PDF]

open access: yesClinical and Experimental Otorhinolaryngology, 2012
ObjectivesMesenchymal stem cells (MSCs) play an important role in the development and growth of tumor cells. However, the effect of human MSCs on the growth of human tumors is not well understood. The purpose of this study is to confirm the growth effect
Yun-Sung Lim   +4 more
doaj   +1 more source

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