查新用项

文献速递

Core-shell based responsive colloidal photonic crystals for facile, rapid, visual detection of acetone

Responsive core-shell microspheres of [email protected](methyl methacrylate-ethylene glycol dimethacrylate-acrylic acid) [[email protected](MMA-EGDMA-AA] were obtained by surfactant-free emulsion polymerization and were employed for the preparation of monolithic polystyrene-based colloidal photonic crystals (CPCs) via evaporation induced-vertical deposition method. CPCs of distinct photonic stop band (PSB), which falls in the visible light region that exhibits brilliant structural colors were obtained by tuning the diameters of the core-shell microspheres. Further, as-fabricated CPCs were used for the facile, rapid visual detection of acetone by way of reversibly tuning the PSB of the CPCs with an apparent visual color change within fraction of a second. The present study demonstrates the feasibility of [email protected](MMA-EGDMA-AA)-based CPCs as a simple, quick and reversible sensing platform for the detection of acetone.

Reactive & Functional Polymers EI,SCI,SCIE | 2021 | 158

Characterization of ligno-cellulosic fiber extracted from Atriplex halimus L. plant

Lignocellulosic fiber extracted from saltbush (Atriplex halimus L.) is characterized as reinforcement of composite materials. The morphological, physical, thermal and mechanical properties of fibers were addressed for the first time in this paper. The fibers were also subjected to chemical analysis. Stems were boiled in 0.5% sodium hydroxide (NaOH) or 10% sodium bicarbonate (NaHCO3). Optical and scanning electron microscopy images show an abundance of fiber in the form of thick-walled polygonal tubes. NaOH treatment yielded rough-surfaced fibers whereas the NaHCO3 treatment yielded smooth-surfaced fiber. Attenuated total reflectance Fourier transform infrared analysis revealed that NaOH treatment removed amorphous components. Based on x-ray diffraction, the crystallinity index increased from 55% to 57%. Thermogravimetry and differential scanning calorimetry showed that the fiber was thermally stable up to 220 °C and 235 °C with activation energies of 56 kJ/mol and 72 kJ/mol respectively for bicarbonate-treated and NaOH-treated material. In single-fiber tensile tests, the latter was stronger, with a Young's modulus of up to 19 GPa and tensile strength of 229 MPa.

International Journal of Biological Macromolecules SCI,SCIE | 2021 | 168

No easy fixes: Government workers’ perception of policy (in)coherence in the implementation of the Post-2015 agenda in Mexico

The Paris Agreement, the Sustainable Development Goals, the Sendai Framework and the New Urban Agenda share a vision of global sustainable development, with several overlapping goals and targets. However, these agendas are often treated along sectoral boundaries leading to highly branched implementation. Underusing potential synergies is not only a burden for governments due to the costs of redundancies and inefficiency but can also hinder collective goals and lead to inter-agenda trade-offs. Despite growing attention on policy coherence in research and policy, existing literature fails to explain why it is so hard to achieve despite widespread recognition of its theoretical value. Based on a literature review and fieldwork in Mexico, our research focuses on the perception of the people in charge of operationalizing the agendas. We develop a typology of non-monetary costs and benefits that encompasses the alternative scenarios of 1) increased coherence in the implementation of the agendas in Mexico and 2) a business-as-usual scenario. Results challenge the dominant approach that focuses on binary policy coherence/incoherence analysis, by identifying also perceived benefits of incoherence and costs of building coherence. They also highlight the importance of often overlooked barriers to cross-sectoral and cross-scalar collaboration driven by institutional arrangements and work culture. The resulting typology differentiates drivers and manifestations of (in)coherence from their impacts on institutions and society. From this, we derive that a scenario of increased coherence in the implementation of the Post-2015 Agenda represents net gains to society and only relative losses to institutions, once the current costs of incoherence are discounted. However, the process of building policy coherence is beyond easy fixes, requiring structural change. Otherwise, institutions risk falling into a cosmetic level of coherence that is both costly and ineffective.

Climate Risk Management SSCI,SCIE | 2021 | 31

Methodic development of laser micro structured cutting tools with microscale textures for AW7075 aluminum alloy using a Plackett–Burman screening design

In this paper, the effect of microscale structures on the tribological and cutting behavior of cutting tools has been evaluated. A method for developing the micro structure design is presented using a statistic screening design. The micro structures are applied using ultrashort-pulsed laser technology. The effects of different structural parameters are investigated in orthogonal cutting of AW7075. Tools with structures benefit from lower cutting forces and exhibit a shorter chip morphology.

CIRP Journal of Manufacturing Science and Technology EI,SCIE | 2021 | 32

Hospital-based epilepsy care in Uganda: A prospective study of three major public referral hospitals

ObjectiveThis study sets out to describe the current demographics of people with epilepsy (PWE) attending hospital-based care in Uganda and the epilepsy treatment practices within three of the largest Ugandan public referral hospitals.MethodsIn a six-month prospective cohort study, 626 children and adults attending epilepsy clinics at Mulago National Referral Hospital, Butabika National Referral Mental Hospital and Mbarara Regional Referral Hospital were enrolled. Using a study questionnaire, data were collected at baseline and at 3 weeks, 3 months, and 6 months following enrollment. Specific data surrounding individual patient demographics, clinical characteristics and severity of epilepsy, and treatment of epilepsy with antiepileptic drugs (AEDs) were collected.ResultsFemale patients totaled to 50.8%, with a nearly equal gender distribution at each hospital. There was no statistical difference in gender or age between sites. The majority of PWE had completed primary school, with less than 15% of patients completing more than a secondary education. Seizure severity was high, with most patients having multiple seizures per week at the initial onset of epilepsy, and greater than 90% of patients reporting a loss of consciousness with seizures. The majority of patients (54.95%) also reported a developmental or learning delay. Most patients were on 1 AED (46.01%) or 2 AEDs (36.90%), with carbamazepine being the most frequently prescribed AED. There was a trend towards improved seizure severity over the follow-up period, as assessed by the corresponding Personal Impact of Epilepsy Scale (PIES) subscale.ConclusionsPeople with epilepsy attending hospital-based care in Uganda tend to have severe forms of epilepsy requiring management with AEDs. Current hospital-based practices show a positive trend for seizure burden and quality of life of PWE in Uganda. Further interventions to improve overall access to biomedical care are required to continue to advance the management of PWE across all communities.This article is part of the Special Issue “The Intersection of Culture, Resources, and Disease: Epilepsy Care in Uganda"

Epilepsy and Behavior SCIE | 2021 | 114