Results 221 to 230 of about 4,354 (265)

Ratiometric Mycotoxin Detection in Living Plants With Dual‐Emissive Nanosensors

open access: yesAdvanced Materials, EarlyView.
A minimally invasive microneedle patch integrates carbon dot‐embedded metal–organic frameworks as nanosensors to detect a key fungal toxin in living plants. The nanosensor produces a ratiometric fluorescence signal that enables early, non‐destructive diagnosis of fungal infection before visible symptoms, offering a new biomaterials‐based strategy for ...
Yuliang Li   +9 more
wiley   +1 more source

Structure-Activity Relationships for 1,3-Dipolar Cycloaddition Reactions of Criegee Intermediates with Carbonyls. [PDF]

open access: yesACS Earth Space Chem
Cornwell ZA   +4 more
europepmc   +1 more source

Supershift properties for nonanalytic signals. [PDF]

open access: yesNanophotonics
Colombo F   +3 more
europepmc   +1 more source

On Hua's estimates for exponential sums

Mathematika, 1987
Let f(x)\(\in {\mathbb{Z}}[X]\), \(e_ q(t)=\exp (2\pi i/q)\) and \(S(q,f)=\sum _{0\leq ...
exaly   +2 more sources

Estimates on polynomial exponential sums

open access: yesIsrael Journal of Mathematics, 2010
Let \(f(x)=a_1x^{k_1}+\cdots+a_rx^{k_r}\in \mathbb{Z}[x]\) be a polynomial of degree \(d\), and let \(q\) be a positive integer. Assume \((a_1,\cdots,a_r,q)=1\), and define \(e_q(x)=e^{2\pi i \frac{x}{q}}\). This paper estimates exponential sums of the form \[ \sum_{1\leq x< q;~(x,q)=1}e_q(f(x)) \quad \text{and}\quad \sum_{1\leq x\leq q}e_q(f(x ...
J. Bourgain
openaire   +2 more sources

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