Results 81 to 90 of about 764,478 (294)

Conformational Snapshots of CydDC in a Native Lipid Bilayer Coupling Heme Transport to Antibiotic Resistance

open access: yesAdvanced Science, EarlyView.
Phylogenetic and biochemical analyses of the heme transporter CydDC reveal its functional conservation throughout bacterial evolution and demonstrate its unique asymmetric allosteric mechanism. Furthermore, impairment of CydDC function directly affects bacterial antibiotic resistance and likely compromises antibiotic efficacy through drug efflux.
Lili Yang   +19 more
wiley   +1 more source

A β-Lactam-Based Stereoselective Access to β,γ-Dihydroxy α-Amino Acid-Derived Peptides with Either α,β-Like or Unlike Configurations

open access: yes, 2016
A concise access to α,β-dihydroxy α-amino acid-derived N-carboxy anhydrides (NCAs) with either like or unlike relative configuration is described. The key steps of the synthetic route are the preparation of the nonracemic 4-alkenyl β-lactams, through ...
Claudio Palomo (1699948)   +4 more
core   +2 more sources

Synthetic Lethality Reveals Mechanisms of Mycobacterium tuberculosis Resistance to β-Lactams

open access: yesmBio, 2014
Most β-lactam antibiotics are ineffective against Mycobacterium tuberculosis due to the microbe’s innate resistance. The emergence of multidrug-resistant (MDR) and extensively drug-resistant (XDR) strains has prompted interest to repurpose this class of ...
Shichun Lun   +7 more
doaj   +1 more source

Synthesis of β-Lactam Scaffolds for Ditopic Peptidomimetics

open access: yes, 2007
Ring opening of α-substituted-α-methoxycarbonyl-N-nosylaziridines provides a practical access to enantiopure α,α‘-disubstituted β-lactam scaffolds, novel types of ditopic reverse turn surrogates.
Palomo, Claudio   +6 more
core   +1 more source

Nanomaterials for Allergy Diagnosis and Treatment: Advances, Opportunities and Translational Challenges

open access: yesAdvanced Science, EarlyView.
Nanomaterials offer dual applications in allergy management. For diagnosis, nanomaterials enhance analytical sensitivity and improve detection in specific IgE and functional assays such as the basophil activation test (BAT). For allergen‐specific immunotherapy, nanomaterials enable allergen masking and controlled release, and effectively modulate the ...
Madiha Habib   +8 more
wiley   +1 more source

Guidelines for Detecting the Foodborne Antibiotic‐Resistant Bacteria

open access: yesAgriFood: Journal of Agricultural Products for Food, EarlyView.
ABSTRACT Foodborne antibiotic‐resistant bacteria threaten global public health and the economic. Standardized detection methods are crucial for effective prevention and control. Researchers encounter difficulties in choosing suitable techniques due to the variety of available approaches and the intricate nature of resistance mechanisms.
Yuanye Zeng, Fengxia Yang
wiley   +1 more source

Chemoselective Synthesis of β-Amino Ester or β-Lactam via Sonochemical Reformatsky Reaction

open access: yes, 2014
A series of β-amino esters were synthesized by the reaction of N-tosyl aldimine or N-hydroxy aldimine with bromoacetate by sonochemical Reformatsky reaction. The β-N-hydroxyamino ester was obtained and the formed sensitive hydroxylamino functionality was
Lee, Adam Shih-Yuan; Chang, Yu-Ting; Su, Feng-Yi
core   +1 more source

Interspecies Biofilm Dynamics Among Staphylococci: Inflammatory Contributions to Chronic Rhinosinusitis

open access: yesInternational Forum of Allergy &Rhinology, EarlyView.
ABSTRACT Introduction Staphylococcus species are frequently isolated from the sinonasal niche of chronic rhinosinusitis (CRS) patients. While Staphylococcus aureus is often associated with recalcitrant CRS, Staphylococcus epidermidis and Staphylococcus lugdunensis are largely deemed commensal.
Sintayehu Ambachew   +8 more
wiley   +1 more source

Outer membrane vesicles from β-lactam-resistant Escherichia coli enable the survival of β-lactam-susceptible E. coli in the presence of β-lactam antibiotics

open access: yes, 2018
Outer membrane vesicles (OMVs) containing various bacterial compounds are released from mainly gram-negative bacteria. Secreted OMVs play important roles in the ability of a bacterium to defend itself, and thus contribute to the survival of bacteria in a
Jong-Su Seo   +15 more
core   +1 more source

Additional file 2: of Treatment of community-onset pneumonia in neutropenic cancer patients: β-lactam monotherapy versus combination antibiotic regimens

open access: yes, 2019
Table S2.. Multivariate analysis of 90-day all-cause mortality due to neutropenic pneumonia. (DOCX 15 kb)
Seok, Hyeri   +9 more
openaire   +1 more source

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