Non-destructive in situ monitoring of photosynthetic quotient in open microalgae cultivation.

Photosynthetic quotient (PQ)-based feedback strategy is emerging as a promising approach for precise optimization the cultivation of microalgae. However, the absence of in situ and non-destructive monitoring methods remains a critical bottleneck in open systems. Here, an intermittent aeration (IA) cultivation mode was constructed for measuring PQ of Nannochloropsis oceanica.

Superhygroscopic Aerogels with Hierarchical String-Bag Structure for Effective Humidity Control.

Environmental humidity regulation is crucial for diverse applications ranging from healthcare, food preservation, drug storage, to electronics protection. Herein, we employed natural cellulose as the raw material to fabricate superhygroscopic aerogels with hierarchical string-bag structure for effective humidity control. The aggregation state of cellulose chains was regulated to fabricate micronano materials, including the cellulose nanofiber network (CNFN), dendritic microfibers (CDF), and pleated microfibers (CPF), via changing the precipitation process of cellulose/ionic liquid solutions.

Sustainable and Robust Coating with Superhydrophobic and Oil-Repellent Performance for Biodegradable Catering Packaging.

Nonbiodegradable functional coatings severely exacerbate the environmental-friendliness of paper packaging. Herein, inspired by the Janus wettability of natural lotus leaves, we demonstrated a practical and easy-to-scale strategy to fabricate a durable, superhydrophobic, oil-repellent, and biodegradable coating for paper-based packaging. A bilayered coating consisting of an inner hydrophilic layer and an outer superhydrophobic layer was constructed on a paper substrate.

Durable photobioreactor antibiofouling coatings for microalgae cultivation by photoreactive poly(2,2,2-trifluoroethyl methacrylate).

To improve the durability of the photobioreactor antibiofouling surface for microalgal cultivation, a series of photoreactive poly(2,2,2-trifluoroethyl methacrylate) (PTFEMA) were successfully synthesized and used to modify ethylene-vinyl acetate (EVA) films by a surface coating and UV light grafting method. Fourier transform infrared (FT-IR) spectra, X-ray photoelectron spectroscopy analysis (XPS) and fluorescence microscopy results indicated that PTFEMA were fixed successfully onto the EVA film surface through a covalent bond. During the microalgal adhesion assay, the number of EVA-PTFEMA film-adhered microalgae was 41.

Outdoor cultivation of Chlorella sp. in an improved thin-film flat-plate photobioreactor in desertification areas.

In order to reduce the flow resistance of the thin-film flat plat photobioreactor (FPPBR) and make it more suitable for mass microalgae cultivation, the channel diameter was modified to 0.06 m and the thin-film FPPBR consisted of 10 parallel shunt-wound channels. A thin-film FPPBR system with 100 modified FPPBRs was constructed and used for Chlorella sp.

Improved antifouling properties of photobioreactors by surface grafted sulfobetaine polymers.

To improve the antifouling (AF) properties of photobioreactors (PBR) for microalgal cultivation, using trihydroxymethyl aminomethane (tris) as the linking agent, a series of polyethylene (PE) films grafted with sulfobetaine (PE-SBMA) with grafting density ranging from 23.11 to 112 μg cm were prepared through surface-initiated atom transfer radical polymerization (SI-ATRP). It was found that the contact angle of PE-SBMA films decreased with the increase in the grafting density.

Installation of flow deflectors and wing baffles to reduce dead zone and enhance flashing light effect in an open raceway pond.

To reduce the dead zone and enhance the flashing light effect, a novel open raceway pond with flow deflectors and wing baffles was developed. The hydrodynamics and light characteristics in the novel open raceway pond were investigated using computational fluid dynamics. Results showed that, compared with the control pond, pressure loss in the flow channel of the pond with optimized flow deflectors decreased by 14.

[A novel flat plate photobioreactor for microalgae cultivation].

Flashing light effect on microalgae could significantly improve the light efficiency and biomass productivity of microalgae. In this paper, the baffles were introduced into the traditional flat plate photobioreactor so as to enhance the flashing light effect of microalgae. Making Chlorella sp.

A novel photobioreactor structure using optical fibers as inner light source to fulfill flashing light effects of microalgae.

In this work, a novel photobioreactor structure using optical fibers being fixed vertically to culture flow direction as inner light source was proposed to fulfill flashing light effects (FLE) of microalgae, so as to obtain high light efficiency. Three types of optical-fiber photobioreactor fulfilling FLE of microalgae, i.e.

Development of transferrin functionalized poly(ethylene glycol)/poly(lactic acid) amphiphilic block copolymeric micelles as a potential delivery system targeting brain glioma.

The aim of present study is to conceive a biodegradable poly(ethylene glycol)-polylactide (PEG-PLA) copolymer nanoparticle which can be surface biofunctionalized with ligands via biotin-avidin interactions and used as a potential drug delivery carrier targeting to brain glioma in vivo. For this aim, a new method was employed to synthesize biotinylated PEG-PLA copolymers, i.e.

Thermoplastic cellulose-graft-poly(L-lactide) copolymers homogeneously synthesized in an ionic liquid with 4-dimethylaminopyridine catalyst.

An effective method for grafting L-lactide (LA) from unmodified cellulose by ring-opening polymerization (ROP) in homogeneous mild conditions is presented. By using 4-dimethylaminopyridine (DMAP) as an organic catalyst, cellulose-graft-poly(L-lactide) (cellulose-g-PLLA) copolymers with a molar substitution (MS(PLLA)) of PLLA in a range of 0.99-12.