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design for recycling

Dongfen Yuan, Frederik Rode, Yanguang Cao
We proposed here a minimal physiologically based pharmacokinetic (mPBPK) model for a group of novel engineered antibodies in mice and humans. These antibodies are designed with altered binding properties of their Fc domain with neonatal Fc receptor (FcRn) or the Fab domain with their cognate targets (recycling antibodies) in acidic endosomes. To enable simulations of such binding features in the change of antibody pharmacokinetics and its target suppression, we nested an endothelial endosome compartment in parallel with plasma compartment based on our previously established mPBPK model...
March 14, 2018: AAPS Journal
Rashmi Agarwalla, Rambha Pathak, Mitasha Singh, Farzana Islam, Mamta Parashar
Background: Ragpickers are informal workers who collect recyclable materials to earn a small wage on daily basis. They work in vulnerable conditions and awareness regarding occupational and environmental hazard is essential for them. Objective: To study the effectiveness of awareness program on various occupational health hazards among the ragpickers. Materials and Methods: This interventional study was conducted from May through October 2016 among the ragpickers living near field practice area of Department of Community Medicine and those living in slum areas around HAHC Hospital, New Delhi, India...
May 2017: Indian Journal of Occupational and Environmental Medicine
Guangwei Geng, Zhongju Wang, Penglei Chen, Bo Guan, Changchun Yang, Minghua Liu
Porphyrin-based supramolecular nanoassemblies of a spherical morphology have been attracting broad interest owing to their wide application possibilities in numerous fields of paramount significance. Most of the existing assembly protocols, however, either suffer from the requirement of elaborately-designed yet tediously-synthesized ad hoc porphyrins, the use of surfactant templates, or accurate consideration of the experimental parameters etc. The initiation of a facile surfactant-free fabrication protocol performable under ambient conditions using commercial porphyrins as building blocks is strongly desired...
March 14, 2018: Physical Chemistry Chemical Physics: PCCP
Chao Han, Shanshan Wang, Zhongrui Li, Chen Chen, Jiqin Hou, Dingqiao Xu, Ruizhi Wang, Yaolan Lin, Jianguang Luo, Lingyi Kong
Countercurrent chromatography (CCC) has gradually become a widely used method for preparative separation of bioactive natural molecules. These molecules generally contain distinct scaffolds and characteristics that cannot be readily isolated from plants. While one-dimensional CCC is typically used for the initial purification with insufficiently resolved peaks after locating bioactive components, two-dimensional (2D) or multi-dimensional CCC strategies are employed to improve the resolution of peaks. However, these methods usually present certain disadvantages, such as complicated procedures and increased time consumption, experimental costs, and equipment requirements...
August 3, 2018: Analytica Chimica Acta
Zhi-Mei Li, Xiao Zhang, Ru-Ping Liang, Xiang-Juan Zheng, Jian-Ding Qiu
In this work, a newly developed surface plasma resonance (SPR) system for the sensitive detection of M.SssI activity has been designed based on double signal amplification with DNA chain cyclic reactions and AuNPs. In the absence of M.SssI, hairpin DNA 1 (HP1) can be cleaved into s1 fragments catalyzed by HpaII. The s1 fragments can then trigger a recycling process of hairpin DNA 2 (HP2) hybridization and subsequently release massive s2 and s3 in the solution of Nt.AlwI and HPII. AuNPs-DNA can be captured on gold film by the released s2 and s3 to produce a strong SPR signal...
August 3, 2018: Analytica Chimica Acta
Jie Luo, Jian Wu, Siyuan Huo, Shihua Qi, Xiaowen Sophie Gu
The combined utilization of direct or alternating electric fields and phytoremediation was designed to decontaminate multi-metal polluted soil at a field scale e-waste recycling impacted site. Eucalyptus globulus was chosen for metal purification for its resilient and unpalatable nature. Biomass production, metal concentration and water use efficiency of the species under direct current (DC) and alternating current (AC) fields with various voltages were investigated. DC and AC fields stimulated the growth of the plant, except for DC field with high voltage (10 V)...
March 5, 2018: Chemosphere
Nana Y D Ankrah, Angela E Douglas
Many symbiotic microorganisms in animals, including insects, have parallels to microbial nutrient factories of biotechnology: just as the metabolism of individual microorganisms and microbial communities is modified by biotechnologists to produce specific nutrients, so the many insect-associated microorganisms synthesize specific nutrients that support the sustained growth and reproduction of their animal host. Three broad metabolic functions are mediated by insect-associated microorganisms: (i)fermentation of dietary constituents, releasing products that contribute to host carbon and energy metabolism; (ii)overproduction of nutrients, notably essential amino acids, required by the host; and (iii)recycling of host waste metabolites...
March 9, 2018: Environmental Microbiology
Naomi Horowitz, Jessica Frago, Dongyan Mu
This study conducted a full life cycle analysis of bottled water on four types of bottles: ENSO, PLA (corn based), recycled PET, and regular (petroleum based) PET, to discern which bottle material is more beneficial to use in terms of environmental impacts. PET bottles are the conventional bottles used that are not biodegradable and accumulate in landfills. PLA corn based bottles are derived from an organic substance and are degradable under certain environmental conditions. Recycled PET bottles are purified PET bottles that were disposed of and are used in a closed loop system...
March 1, 2018: Waste Management
Mohammad Abdullatif Bukhari, Ruth Carrasco-Gallego, Eva Ponce-Cueto
Textiles waste is relatively small in terms of weight as compared to other waste streams, but it has a large impact on human health and environment, and its rate is increasing due to the 'fast fashion' model. In this paper, we examine the French national programme for managing post-consumer textiles and clothing through a case study research. To date, France is the only country in the world implementing an extended producer responsibility (EPR) policy for end-of-use clothing, linen and shoes. The case highlights the benefits of using an EPR policy and provides interesting insights about the challenges faced by the textiles waste sector...
March 1, 2018: Waste Management & Research
Guangyin Fan, Xiaojing Li, Caili Xu, Weidong Jiang, Yun Zhang, Daojiang Gao, Jian Bi, Yi Wang
Developing highly efficient and recyclable catalysts for the transformation of toxic organic contaminates still remains a challenge. Herein, Titanium Carbide (Ti₃C₂) MXene modified by alkali treatment process was selected as a support (designated as alk-Ti₃C₂X₂, where X represents the surface terminations) for the synthesis of Pd/alk-Ti₃C₂X₂. Results show that the alkali treatment leads to the increase of surface area and surface oxygen-containing groups of Ti₃C₂X₂, thereby facilitating the dispersion and stabilization of Pd species on the surface of alk-Ti₃C₂X₂...
March 2, 2018: Nanomaterials
Karen B Schloss, Laurent Lessard, Charlotte S Walmsley, Kathleen Foley
People interpret abstract meanings from colors, which makes color a useful perceptual feature for visual communication. This process is complicated, however, because there is seldom a one-to-one correspondence between colors and meanings. One color can be associated with many different concepts (one-to-many mapping) and many colors can be associated with the same concept (many-to-one mapping). We propose that to interpret color-coding systems, people perform assignment inference to determine how colors map onto concepts...
2018: Cognitive Research: Principles and Implications
Philippe Kalck, Martine Urrutigoïty
In the context of atom economy and low environmental impact, synthesis of amines by an efficient catalytic process is of great importance to produce these building blocks for fine chemical industry. The one-pot hydroaminomethylation of alkenes is a tandem reaction which involves three successive steps under CO/H2 pressure to perform the catalyzed hydroformylation of the alkene into the corresponding aldehyde followed by its condensation with a N-H function and the catalyzed hydrogenation of the imine/enamine intermediate into the corresponding saturated amine...
March 1, 2018: Chemical Reviews
Richard Gondosiswanto, David Brynn Hibbert, Yu Fang, Chuan Zhao
A new design for a membrane-free gas sensor modified with a thin layer of ionic liquid is described. The new approach uses miniaturized interdigitated microelectrodes for detecting gases having reversible electrochemistry, for example dioxygen. Analyte molecules are reduced on the first working electrode creating an intermediate species (e.g. superoxide, O2•-, from dioxygen) that can be re-oxidized back to the original molecule at the second working electrode. The loop of redox reactions enhances the measured current leading to high sensitivity (3...
February 26, 2018: Analytical Chemistry
Tobias Niederwieser, Patrick Kociolek, David Klaus
An Environmental Control and Life Support System (ECLSS) is necessary for humans to survive in the hostile environment of space. As future missions move beyond Earth orbit for extended durations, reclaiming human metabolic waste streams for recycled use becomes increasingly important. Historically, these functions have been accomplished using a variety of physical and chemical processes with limited recycling capabilities. In contrast, biological systems can also be incorporated into a spacecraft to essentially mimic the balance of photosynthesis and respiration that occurs in Earth's ecosystem, along with increasing the reuse of biomass throughout the food chain...
February 2018: Life Sciences in Space Research
Wenfang Gao, Chenming Liu, Hongbin Cao, Xiaohong Zheng, Xiao Lin, Haijuan Wang, Yi Zhang, Zhi Sun
Recovery of metals from spent lithium-ion batteries (LIBs) has attracted worldwide attention because of issues from both environmental impacts and resource supply. Leaching, for instance using an acidic solution, is a critical step for effective recovery of metals from spent LIBs. To achieve both high leaching efficiency and selectivity of the targeted metals, improved understanding on the interactive features of the materials and leaching solutions is highly required. However, such understanding is still limited at least caused by the variation on physiochemical properties of different leaching solutions...
February 16, 2018: Waste Management
Maria Valentina Dinu, Ionel Adrian Dinu, Maria Marinela Lazar, Ecaterina Stela Dragan
An original strategy is proposed here to design chitosan-based ion-imprinted cryo-composites (II-CCs) with pre-organized recognition sites and tailored porous structure by combining ion-imprinting and ice-templating techniques. The cryo-composites showed a tube-like porous morphology with interconnected parallel micro-channels, the distance between the channel walls being around 15 μm. Both the entrapment of a natural zeolite and the presence of carboxylate groups, generated by partial hydrolysis of amide moieties, led to II-CCs with controlled swelling ratios (25-40 g/g, depending on pH) and enhanced overall chelating efficiency (260 mg Cu2+ /g composite)...
April 15, 2018: Carbohydrate Polymers
Hang Sun, Shan Zeng, Yinxing Shang, Qinrong He
Developing an effective and reliable method for trace arsenic (As) detection is a prerequisite for improving the safety of drinking water. In this paper, we designed and prepared Ag@Fe3O4 core-shell nanoparticles (NPs), which were then used as Surface-Enhanced Raman Scattering (SERS) probe for trace arsenate (As(V)) detection. The Ag@Fe3O4 core-shell NPs were prepared by in situ growth of Fe3O4 NPs on the surface of AgNPs, which can effectively combine the strong adsorption ability of Fe3O4 nanoshells to As(V) with high SERS activity of Ag nanocores to decrease the detection limit...
February 1, 2018: Journal of Nanoscience and Nanotechnology
Fengzhou Xu, Lan Luo, Hui Shi, Xiaoxiao He, Yanli Lei, Jinlu Tang, Dinggeng He, Zhenzhen Qiao, Kemin Wang
Poly(thymine)-hosted copper nanoparticles (poly T-CuNPs) have emerged as a promising label-free fluorophore for bioanalysis, but its application in RNA-related studies is still rarely explored. Herein, by utilizing duplex-specific nuclease (DSN) as a convertor to integrate target recycling mechanism into terminal deoxynucleotidyl transferase (TdT)-mediated superlong poly T-CuNPs platform, a specific and sensitive method for microRNA detection has been developed. In this strategy, a 3'-phosphorylated DNA probe can hybridize with target RNA and then be cut by DSN to produce 3'-hydroxylated fragments, which can be further tailed by TdT with superlong poly T for fluorescent CuNPs synthesis...
June 20, 2018: Analytica Chimica Acta
Chen Yang, Ying Chen, Dan Liu, Cheng Chen, Jiemin Wang, Ye Fan, Shaoming Huang, Weiwei Lei
The development of ideal three-dimensional (3D) tailorable surface-enhanced Raman scattering (SERS) substrates with the properties of timesaving, large area, high-throughput, single or few molecules detection, reproducibility, reusable ability and high density of "hot spots", has been the mainstream challenge and robust task. Here, we construct perpendicularly sandwich-like Au@Al2O3@Au hybrid nanosheets (PSHNs) on the Al foil as a 3D flexible substrate for SERS. The design of 3D PSHNs incorporates several advantageous aspects for SERS to enhance the performance of plasmonic diamers via bi-functions of vertical Al2O3 nanosheets (NSs) including the nano-scaffold and nano-baffle plate effects...
February 14, 2018: ACS Applied Materials & Interfaces
Markus Ellersdorfer
The technical feasibility of an ammonium recovery process ('ion-exchanger-loop-stripping') for sludge liquor from municipal wastewater treatment plants is examined. The proposed process combines ion-exchange on natural zeolites with simultaneous air stripping of ammonia to produce an industrial NOx-removal agent. Column experiments with continuously recycled NH4Cl-solutions and a real sludge liquor sample were conducted to determine basic ion-exchange kinetics of the applied clinoptilolite. Mass balances of consecutive loading/regeneration cycles show the positive influence of NaCl-pretreatment as well as simultaneous air stripping on the NH4+-exchange capacities...
February 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
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