Long-lasting, UV shielding, and cellulose-based avermectin nano/micro spheres with dual smart stimuli-microenvironment responsiveness for Plutella xylostella control.

The requirement to improve the efficiency of pesticide utilization has led to the development of sustainable and smart stimuli-responsive pesticide delivery systems. Herein, a novel avermectin nano/micro spheres (AVM@HPMC-Oxalate) with sensitive stimuli-response function target to the Lepidoptera pests midgut microenvironment (pH 8.0-9.

Characteristics of Extended-Spectrum β-Lactamase-Producing Derived from Food and Humans in Northern Xinjiang, China.

This study aimed to investigate the drug resistance, molecular characteristics, and genetic relationship of extended-spectrum β-lactamase (ESBL)-producing isolated from food and human stool samples in northern Xinjiang. From 2015 to 2016, a total of 431 samples (meats and vegetables) were collected from retail markets and supermarkets located in the regions of Urumqi, Shihezi, and Kuitun in Xinjiang, China, and 20 human stool samples from the Shihezi Hospital. The PCR method was used to detect , and the presence of ESBL-producing was confirmed using the K-B disk diffusion confirmatory method.

The tainted altruism effect: a successful pre-registered replication.

Newman and Cain (Newman, Cain 2014 , 648-655 (doi:10.1177/0956797613504785)) reported that observers view a person's choices as less ethical when that person has acted in response to both altruistic and selfish (commercial) motivations, as compared with purely selfish interests. The altruistic component reduces the observers' approval rather than raising it.

A method based on amino-modified magnetic nanoparticles to extract DNA for PCR-based analysis.

DNA extraction using magnetic particles (MPs) is a simple and rapid process. MPs directly combine with DNA, thereby facilitating removal of impurities in complex samples by magnetic attraction. Amino-modified magnetic nanoparticles (AMNPs) have been described as poor substrates for DNA extraction because it was difficult to desorb DNA from the AMNPs for downstream assays.

Enhancement of PCR Sensitivity and Yield Using Thiol-modified Primers.

Various additives can enhance the quality of PCR amplification, but these generally require considerable optimization to achieve peak performance. Here, we demonstrate that the use of thiol-modified primers can enhance both PCR sensitivity and yield. In experiments with V.

A long time low drift integrator with temperature control.

The output of an operational amplifier always contains signals that could not have been predicted, even with knowledge of the input and an accurately determined closed-loop transfer function. These signals lead to integrator zero-drift over time. A new type of integrator system with a long-term low-drift characteristic has therefore been designed.

The Construction of an Aqueous Two-Phase System to Solve Weak-Aggregation of Gigaporous Poly(Styrene-Divinyl Benzene) Microspheres.

Gigaporous poly(styrene-divinyl benzene) microspheres made via the surfactant reverse micelles swelling method had a controllable pore size of 100⁻500 nm. These microspheres had unique advantages in biomacromolecule separation and enzymes immobilization. However, the obtained microspheres adhered to each other in the preparation process.

Overexpression of specific proton motive force-dependent transporters facilitate the export of surfactin in Bacillus subtilis.

A novel surfactin producer, Bacillus subtilis THY-7, was isolated from soil. Using liposomes and transmembrane transport inhibitors, the surfactin efflux in THY-7 was determined to be mainly dependent on proton motive force (PMF), not ATP hydrolysis. YcxA, KrsE and YerP, three putative lipopeptide transporters with PMF as energy source, were then highlighted in this work.

Synergistic effects and physiological responses of selected bacterial isolates from animal feed to four natural antimicrobials and two antibiotics.

In this study, 20 samples from three different sources of animal feed were investigated and six bacterial isolates were identified. The susceptibility of four natural antimicrobials, namely, eugenol, cinnamaldehyde, thymol, and carvacrol, against six of these isolates was determined. Carvacrol and eugenol showed better inhibitory effects with larger zones of inhibition.

The influence of non-lethal temperature on the rate of inactivation of vegetative bacteria in inimical environments may be independent of bacterial species.

The influence of non-lethal temperature on the survival of two species of food-borne bacteria under growth-preventing pH and water activity conditions was investigated. Specifically, inactivation rates of four strains of Escherichia coli and three strains of Listeria monocytogenes were determined in culture broth adjusted to pH 3.5 and water activity 0.

Temperature governs the inactivation rate of vegetative bacteria under growth-preventing conditions.

Novel studies, in combination with a meta-analysis of available data, were undertaken to explore the kinetics of non-thermal inactivation of Escherichia coli with particular attention to inactivation in fermented meats and including analogous broth-based model systems. The analyses were based on rates of inactivation and specifically investigated the influence of temperature, pH and water activity at levels that alone, or in combination, prevented growth. When independently-derived inactivation data, obtained using different test conditions and diverse E.