Results 51 to 60 of about 1,069,430 (319)

Thymic Carcinoid Tumour

open access: yesCanadian Respiratory Journal, 2002
Carcinoid tumours of the thymus are rare. The case of a 57-year-old asymptomatic man with a carcinoid tumour of the thymus, who showed a widened mediastinum by chest x-ray, is presented. Fine needle aspiration suggested the diagnosis, which was confirmed
Isabel Parra   +3 more
doaj   +1 more source

Optimal shield mass distribution for space radiation protection [PDF]

open access: yes, 1972
Computational methods have been developed and successfully used for determining the optimum distribution of space radiation shielding on geometrically complex space vehicles.
Billings, M. P.
core   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

The anti‐CRISPR protein AcrIE8.1 inhibits the type I‐E CRISPR‐Cas system by directly binding to the Cascade subunit Cas11

open access: yesFEBS Letters, EarlyView.
In this study, we present the structure of AcrIE8.1, a previously uncharacterized anti‐CRISPR protein that inhibits the type I‐E CRISPR‐Cas system. Through a combination of structural and biochemical analyses, we demonstrate that AcrIE8.1 directly binds to the Cas11 subunit of the Cascade complex to inhibit the CRISPR‐Cas system.
Young Woo Kang, Hyun Ho Park
wiley   +1 more source

Lead dislodgement after a very long‐term period of cardiac implantable electronic device implantation

open access: yesJournal of Arrhythmia, 2021
A 74‐year‐old man was admitted for a second replacement of a transvenous implantable cardioverter‐defibrillator (ICD) generator at 15 years after implantation. Postoperatively, electrocardiographic monitoring showed atrial lead malfunction.
Hidehiro Iwakawa   +4 more
doaj   +1 more source

Structural insights into lacto‐N‐biose I recognition by a family 32 carbohydrate‐binding module from Bifidobacterium bifidum

open access: yesFEBS Letters, EarlyView.
Bifidobacterium bifidum establishes symbiosis with infants by metabolizing lacto‐N‐biose I (LNB) from human milk oligosaccharides (HMOs). The extracellular multidomain enzyme LnbB drives this process, releasing LNB via its catalytic glycoside hydrolase family 20 (GH20) lacto‐N‐biosidase domain.
Xinzhe Zhang   +5 more
wiley   +1 more source

First XMM-Newton Observations of the Globular Cluster M22 [PDF]

open access: yes, 2001
We have examined preliminary data of the globular cluster, M22, from the EPIC MOS detectors on board XMM-Newton. We have detected 27 X-ray sources within the centre of the field of view, 24 of which are new detections. Three sources were found within the
Asai   +37 more
core   +2 more sources

The Caenorhabditis elegans DPF‐3 and human DPP4 have tripeptidyl peptidase activity

open access: yesFEBS Letters, EarlyView.
The dipeptidyl peptidase IV (DPPIV) family comprises serine proteases classically defined by their ability to remove dipeptides from the N‐termini of substrates, a feature that gave the family its name. Here, we report the discovery of a previously unrecognized tripeptidyl peptidase activity in DPPIV family members from two different species.
Aditya Trivedi, Rajani Kanth Gudipati
wiley   +1 more source

Case File: Use of POCUS for assessment of dyspnea in the Emergency Department

open access: yesPOCUS Journal, 2016
A 65 year-old man presented to the Emergency Department at Kingston General Hospital with progressive shortness of breath, fatigue, dull chest discomfort that worsened with deep breathing and exertion.
Jennifer Meloche
doaj   +1 more source

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