Công bố khoa học

Trang chủ / Công bố khoa học

Năm công bố

Nhóm ngành

Antioxidative Activity of Platinum Nanocolloid and Its Protective Effect Against Chemical-Induced Hepatic Cellular Damage

Choi, Mi-Ran; Do, Le Thanh; Chung, Yong-Hoon; Yoo, Hoon; Yu, Rina (2015) Antioxidative Activity of Platinum Nanocolloid and Its Protective Effect Against Chemical-Induced Hepatic Cellular Damage, Journal of Nanoscience and Nanotechnology, 15(8):5571-5576.

Đọc thêm

Tuyển chọn vi khuẩn vùng rễ kích thích cây trồng chịu mặn

Võ Thị Phúc Diễm, Nguyễn Thị Chi Phương, Lưu Thị Huyền Trang, Nguyễn Thành Trung (2015) Tuyển chọn vi khuẩn vùng rễ kích thích cây trồng chịu mặn. Tạp chí khoa học và công nghệ, Đại học Duy Tân. 1(14): 1-9

Đọc thêm

Groutability estimation of grouting processes with cement grouts using Differential Flower Pollination Optimized Support Vector Machine

Đọc thêm

Fuzzy clustering chaotic-based differential evolution for resource leveling in construction projects

Đọc thêm

A Novel Relevance Vector Machine Classifier with Cuckoo Search Optimization for Spatial Prediction of Landslides

Đọc thêm

A novel fuzzy K-nearest neighbor inference model with differential evolution for spatial prediction of rainfall-induced shallow landslides in a tropical hilly area using GIS

Đọc thêm

Enhanced efficiency for better wastewater sludge hydrolysis conversion through ultrasonic hydrolytic pretreatment

The major requirements for accelerating the process of anaerobic digestion and energy production are breaking the structure of waste activated sludge (WAS), and transforming it into a soluble form suitable for biodegradation. This work investigated and analysed a novel bench-scale ultrasonic system for WAS disruption and hydrolysis using ultrasonic homogenization. Different commercial sonoreactors were used at low frequencies under a variety of operating conditions (intensity, density, power, sonication time, and total suspended solids) to evaluate the effects of the equipment on sludge hydrolysis and to generate new insights into the empirical models and mechanisms applicable to the real-world processing of wastewater sludge. A relationship was established between the operating parameters and the experimental data. Results indicated an increase in sonication time or ultrasonic intensity correlated with improved sludge hydrolysis rates, sludge temperature, and reduction rate of volatile solids (33.51%). It also emerged that ultrasonication could effectively accelerate WAS hydrolysis to achieve disintegration within 5–10 min, depending on the ultrasonic intensity. This study also determined multiple alternative parameters to increase the efficiency of sludge treatment and organic matter reduction, and establish the practicality of applying ultrasonics to wastewater sludge pretreatment.

Đọc thêm

Preparation and physical characteristics of epoxy resin/ bacterial cellulose biocomposites

Using bacterial cellulose (BC) prepared from Vietnamese nata-de-coco via an alkaline pre-treatment followed by a solvent exchange process, epoxy resin (EP)/BC biocomposites were fabricated using three different dispersion techniques: mechanical stirring only, both mechanical stirring and grinding, and both mechanical stirring and ultrasonication. The surface of BC was modified with a silane coupling agent to improve the chemical affinity between BC and epoxy resin. The biocomposite materials comprising BC, epoxy resin, and methylhexahydrophthalic anhydride as a curing agent were obtained from hot curing processing. The morphology and mechanical properties such as fracture toughness, enhanced K values, and tensile and flexural properties of the bio-based composites were compared with those of the virgin epoxy resin. The silane coupling agent had a vital role in improving the mechanical characteristics of the bio-based composites. For instance, K IC values, tensile strength, Young’s modulus, and flexural strength of the 0.3 wt% BC/epoxy composites with the presence of 2.0 wt% silane coupling agent were 0.7740 MPa m -1/2 , 53.32 MPa, 1.68 GPa, and 83.05 MPa. These values represent improvements of 36.77, 17, 15.86, and 14.42%, respectively, compared to a neat epoxy resin. Scanning electron microscopy revealed the rough fracture surface of epoxy resin/BC-based biocomposites with a multipathway crack, requiring more energy before breakage.

Đọc thêm

Effect of micro/nano white bamboo fibrils on physical characteristics of epoxy resin reinforced composites

As a green filler comprising both nano and micro-sized fibrils, micro/nano white bamboo fibrils (MWBFs) were treated with a silane coupling agent (S-MWBFs) prior to their introduction in an epoxy resin (EP). The sequential processes of steam explosion, alkaline treatment, and micro grinding were used to prepare to MWBFs. The effects of the S-MWBFs on various characteristics of the cured EP such as compatibility, fracture toughness, morphology, mechanical property, and flame retardation were studied. The fracture toughness and mechanical characteristics of both the storage modulus and tand maximum increased following addition of the S-MWBFs to the EP. Notably, the fracture toughness of the EP with 0.3 wt% of S-MWBFs was 22.2% higher than that of unmodified resin. Scanning electron microscopy presented somewhat rougher surfaces with shear deformation and tortuously twisting cracks, resulting in a higher fracture toughness in S-MWBFmodified epoxy samples. However, fire testing showed that the presence of S-MWBFs increased the burning rate of the EP.

Đọc thêm

Diffusion and reaction of H2 gas for reducing Eu3+ ions in glasses

Đọc thêm

Regulation of photosensitisation processes by an RNA aptamer. Scientific Reports, 7, 43272. (2017). (ISI, IF = 5.228)

Đọc thêm

Fluorescence properties of valence-controlled Eu2+ and Mn2+ ions in aluminosilicate glasses

Đọc thêm

Energy transfer phenomena and Judd-Ofelt analysis on Sm3+ ions in K2GdF5 crystal

Đọc thêm

Ferromagnetic clusters induced by a nonmagnetic random disorder in diluted magnetic semiconductors

Đọc thêm

Linear and nonlinear magneto-optical absorption in parabolic quantum well

Đọc thêm