Thư viện tài liệu, ebook tham khảo dành cho học sinh, sinh viên
Thư viện tài liệu trực tuyến miễn phí dành cho các bạn học sinh, sinh viên
Fabrication of curcumin loaded nano polycaprolactone/chitosan nonwoven fabric via electrospinning technique - Minh Son HoangThe curcumin-loaded PCL/CTS nanofibers were successfully fabricated via electrospinning method to be used for testing curcumin release in vitro. The optimum parameters for electrospinning operation are: PCL/CTS = 9/1, U= 15 kV, L = 8 cm, Q = 0.3 mL/h. The fibers fabricated using these parameters have good morphology with the average diameter from 2...
10 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 2 | Lượt tải: 0
Applying bi–functional dyeing and uv protection on protein textile materials with waste from used teabags and mangosteen hulls - Bui Mai HuongIt can be stated from this study that the dye solution extracted from mangosteen hulls and used tea-bags can provided silk fabric with good to excellent sun protective property proved by UPF values. The K/S values were used to evaluate the influence of dyeing conditions (temperature, time, pH and dye concentrations, mordants). Optimal dyeing condit...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 2 | Lượt tải: 0
The effect of leather fibers on vulcanization behavior of natural rubber - Le Thuy HangThe vulcanization of natural rubber was investigated at difference temperatures using a rotorless rheometer testing. It is found that appropriate temperature for vulcanization of NR/LFs composite system should be 120 °C. Moreover, it is clarified that the presence of LFs leading to the decreasing of the vulcanization time and increasing of maxim...
6 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 2 | Lượt tải: 0
Application of self–cleaning treatment on cotton and pes/co fabric using tio2 and sio2 coating synthesized by sol–gel method - Bui Mai HuongThis study demonstrated that that self-cleaning capacity of cotton and PeCo fabrics can obtain when treated with Tio, nano solution prepared at 60 °C and with nano Tioz-SiO 2:1 colloids synthesized by sol-gel method. The coating film on surfaces protected the cotton and PeCo fabric from stains, even with hard stains such as wine or coffee stains. T...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 2 | Lượt tải: 0
Synthesis of benzoxazine monomer with low curing temperature from renewable diphenolic acid, benzylamine and paraformaldehydeWe have successfully synthesized a novel benzoxazine monomer from renewable diphenolic acid, benzylamine and paraformaldehyde by a solvent method. The monomer structure were well confirmed by the FTIR, 1H NMR and 13C NMR. With the presence of carboxylic group in the monomer structure, the polymerization temperature of DPA–b was significantly lo...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 2 | Lượt tải: 0
Hydrothermal synthesis of nano bilayered v2o5 and electrochemical behavior in non–aqueous electrolytes lipf6 and naclo4In summary, we had synthetized nano–crystalline bilayered V2O5 by hydrothermal rout from a precursor of VCl3. The XRD pattern of bilayered V2O5 showed the typical (00l) with an interlayer spacing of 11.7 Å. Bilayered V2O5 could insert reversiblely 1.5 ion Li+ (~220 mAh/g); while a stability of sodium’s intercalation occurred at 0.8 ion, correspo...
6 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 2 | Lượt tải: 0
Radiation synthesis and characterization of chitosan stabilized gold nanoparticles and catalytic activity studyA simple convenient and “green” method for the synthesis of stable gold nanoparticles in chitosan aqueous solution has been investigated. Gold nanoparticles were successfully synthesized in the presence of chitosan under e–beam and γ–irradiation. Our results show that the size of the preformed Au cluster prior to aggregation and the nucleation p...
11 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 2 | Lượt tải: 0
Biodegradable gelatin decorated fe3o4 nanoparticles for paclitaxel delivery - Dai Hai NguyenDLE is an important property in drug–loaded nanocarriers and directly affects the therapeutic effect of the system. The higher encapsulation capacity NPs have, the larger number of drug are released at the tumor site. In this study, the DLE of Fe3O4@GEL was found to be 86.7 ± 3.2 %. The result demonstrated that Fe3O4@GEL with the high DLE have t...
6 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 2 | Lượt tải: 0
Using inverse method for evaluating thermal characteristics of a micro high speed motorized spindle - Ngo Thi ThaoThermal characteristics of a micro high speed spindle are successfully investigated through inverse method based on a combination of FE thermal model and conjugate gradient method. Experiments for getting temperatures at some locals on housing surface are performed. Results indicate that the proposed method can acquire inverse solution by using ...
10 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 2 | Lượt tải: 0
Tổng hợp và tính chất quang của bột huỳnh quang phát xạ ánh sáng màu đỏ/vàng-Lục và lam xcao.mgo.2sio2:eu3+/eu2+ cho wled - Tống Thị Hảo TâmKhi được kích thích bởi nguồn kích thích bước sóng 370 nm, bột huỳnh quang xCaO.MgO.2SiO2:Eu3+ (x = 2, 3) phát xạ các dải hẹp thuộc vùng ánh sáng đỏ từ 590 – 700 nm tương ứng với chuyển tiếp phát xạ 5d – 4f đặc trưng của Eu3+ trong mạng nền xCaO.MgO.2SiO2. Trong đó phát xạ 613 nm (5D0 → 7F2) có cường độ mạnh nhất. Ngoài ra, phổ phát xạ của vật ...
11 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 2 | Lượt tải: 0
