One‐to‐One Comparison of Graphite‐Blended Negative Electrodes Using Silicon Nanolayer‐Embedded Graphite versus Commercial Benchmarking Materials for High‐Energy Lithium‐Ion Batteries

While existing carbonaceous anodes for lithium–ion batteries (LIBs) are approaching a practical capacitive limit, Si has been extensively examined as a potential alternative because it shows exceptional gravimetric capacity (3579 mA h g^?1) and abundance. However, the actual implementation of Si anodes is impeded by difficulties in electrode calendering processes and requirements for excessive binding and conductive agents, arising from the brittleness, large volume expansion (>300%), and low electrical conductivity (1.56 × 10^?3 S m^?1) of Si. In one rational approach to using Si in high‐energy LIBs, mixing Si‐based materials with graphite has attracted attention as a feasible alternative for next‐generation anodes. In this study, graphite‐blended electrodes with Si nanolayer‐embedded graphite/carbon (G/SGC) are demonstrated and detailed one‐to‐one comparisons of these electrodes with industrially developed benchmarking samples are performed under the industrial electrode density (>1.6 g cc^?1), areal capacity (>3 mA h cm^?2), and a small amount of binder (3 wt%) in a slurry. Because of the favorable compatibility between SGC and conventional graphite, and the well‐established structural features of SGC, great potential is envisioned. Since this feasible study utilizes realistic test methods and criteria, the rigorous benchmarking comparison presents a comprehensive understanding for developing and characterizing Si‐based anodes for practicable high‐energy LIBs.     

Producing scientific posters,using online scientific resources,improves applied scientific skills in undergraduates

ABSTRACT

To succeed, undergraduate science students need to both acquire knowledge, and learn to apply it effectively. Here a novel 1^st year undergraduate module (incorporating blended learning, applied bioinformatic skills and scientific posters) is described and its effectiveness evaluated (quantitatively and qualitatively). The aims were to engage students and teach applied skills through a process-oriented guided-inquiry learning (POGIL) based project, utilising common online tools. Given a nucleotide entry and utilising the National Centre for Biotechnology Information (NCBI) platform students had to identify a specific human syndrome. Students then retrieved and summarised key scientific data, presenting it as a scientific poster. The module effectiveness was demonstrated by the students ability to acquire knowledge (content) and apply it (process), by finding and extracting data from online databases. Assessment included evaluation of the students ability to analyse, visualise and explain acquired data as a scientific poster. Module evaluation used qualitative students surveys and quantitative assessment (pre- and post- module, multiple-choice quiz, assessing content or process specific knowledge). The module led to a significant increase in students applied, process specific, knowledge and enhanced their learning experience. This module demonstrates a successful method for incorporating applied learning into an undergraduate module, developing multiple applied professional skills.     

Optimization of growing conditions for pigments production from microalga Navicula incerta using response surface methodology and its antioxidant capacity

Navicula incerta is a marine microalga distributed in Baja California, México, commonly used in aquaculture nutrition, and has been extended to human food, biomedical, and pharmaceutical industries due to its high biological activity. Therefore, the study aimed to optimize culture conditions to produce antioxidant pigments. A central composite experimental design and response surface methodology (RSM) was employed to analyze the best culture conditions. The medium (nitrogen-deficient concentrations), salinity (PSU = Practical Salinity Unity [g/kg]), age of culture (days), and solvent extraction (ethanol, methanol, and acetone) were the factors used for the experiment. Chlorophyll a (Chl a) and total carotenoids (T-Car), determined spectroscopically, were used as the response variables. The antioxidant capacity was evaluated by DPPH^? and ABTS^?+ radical inhibition, FRAP, and anti-hemolytic activity. According to the overlay plots, the optimum growth conditions for Chl a and T-Car production were the following conditions: medium = 0.44 mol·L^-1 of NaNO₃, salinity = 40 PSU, age of culture: 3.5 days, and solvent = methanol. The pigment extracts obtained in these optimized conditions had high antioxidant activity in ABTS^?+ (86.2–92.1% of inhibition) and anti-hemolytic activity (81.8–96.7% of hemolysis inhibition). Low inhibition (33–35%) was observed in DPPH^?. The highest value of FRAP (766.03 ± 16.62 μmol TE/g) was observed in the acetonic extract. The results demonstrated that RSM could obtain an extract with high antioxidant capacity with potential applications in the biomedical and pharmaceutical industry, which encourages the use of natural resources for chemoprevention of chronic-degenerative pathologies.     

INTER‐ETHICS: TOWARDS AN INTERACTIVE AND INTERDEPENDENT BIOETHICS

Since its origin bioethics has been a specialized, academic discipline, focussing on moral issues, using a vast set of globalized principles and rational techniques to evaluate and guide healthcare practices. With the emergence of a plural society, the loss of faith in experts and authorities and the decline of overarching grand narratives and shared moralities, a new approach to bioethics is needed. This approach implies a shift from an external critique of practices towards embedded ethics and interactive practice improvement, and from a legal defence of rights towards fostering interdependent practices of responsibility. This article describes these transitions within bioethics in relation to the broader societal and cultural dynamics within Western societies, and traces the implications for the methodologies and changing roles of the bioethicist. The bioethicist we foresee is not just a clever expert but also a relationally sensitive person who engages stakeholders in reciprocal dialogues about their practice of responsibility and helps to integrate various sorts of knowledge (embodied, experiential, visual, and cognitive‐scientific). In order to illustrate this new approach, we present a case study. It concerns a project focusing on an innovation in elderly care, based on the participation of various stakeholders, especially older people themselves.     

A contribution to spline-regression

Considered are polynomial spline-regressions by which functions with individual behaviour over parts of their domain may be approximated (in square mean) in a favourable manner by successive polynomials. Concerning the connections of the individual polynoms different conditions may be imposed as to continuity and smoothness. Beside of the calculation of the regression parameters essential results are the construction of confidence regions for the regression function and the formulation of tests for special dependence. Hints for practical application are given and a concrete example from agriculture is presented.     

“环境工程微生物学”课程思政实践举措

课程思政在高校实现“三全育人”体系中发挥着重要的作用，是当前高校教学改革研究的热点之一。本文以环境工程专业“环境工程微生物学”课程为例，首先从课程思政元素发掘、提升教师课程思政能力、培养学生学习兴趣和重要保障等四方面对该课程思政开展具体实践；其次从提升学生课程思政理念、提高学生课程成绩及对全校课程思政的引领等方面展现课程思政的实践成效；最后结合教学实践对课程思政进行了讨论和展望。通过上述研究，以期为环境工程专业课程思政改革提供实践路径，为发挥专业课的育人机制提供参考。