Tofu-inspired microcarriers from droplet microfluidics for drug delivery

Microcarriers have attracted increasing interests in drug delivery. In order to develop this technique, it is prone to focus on the generation of functional particles through using simple approaches and novel but accessible materials. Here, inspired by the formation mechanism of tofu that through the mixing of soymilk and brine for cross-linking soybean proteins, we present novel soybean protein microcarriers by using microfluidic generation approach for drug delivery. Since the soybean protein droplets are generated by microfluidic emulsification method, the tofu microparticles present highly monodisperse and homogeneous morphologies. Because of the excellent biocompatibility of the soybean protein and the interconnected porous structures throughout the whole microparticles after freeze-drying, various kinds of drugs and active molecules could be absorbed and loaded in the microcarriers, which makes them versatile for drug delivery. It can be anticipated that the microfluidic-generated tofu microcarriers will have great potential in the biomedical field.     

Patterning catalyst via inkjet printing to grow single-walled carbon nanotubes

We demonstrated a method to pattern catalyst via inkjet printing to grow SWNTs, using metal salt solutions as the inks and an ordinary office-use printer. We printed water solutions of cobalt acetate on hydrophilic Si substrates and grew high quality SWNT films.     

Synthetic studies toward swinhoeisterol A,a novel steroid with an unusual carbon skeleton

Swinhoeisterol A is a novel steroid with unusual 6/6/5/7 tetracyclic skeleton. The model compound with BCD rings is constructed by Friedel–Crafts acylation and an oxidative dearomatization as key steps.     

Nonradiative Excited-State Decay via Conical Intersection in Graphene Nanostructures

Chemical groups are known to tune the luminescent efficiencies of graphene-related nanomaterials, but some species, including the epoxide group (−COC−), are suspected to act as emission-quenching sites. Herein, by performing nonadiabatic excited-state dynamics simulations, we reveal a fast (within 300 fs) nonradiative excited-state decay of a graphene epoxide nanostructure from the lowest excited singlet (S₁) state to the ground (S₀) state via a conical intersection (CI), at which the energy difference between the S₁ and S₀ states is approximately zero. This CI is induced after breaking one C−O bond at the −COC− moiety during excited-state structural relaxation. This study ascertains the role of epoxide groups in inducing the nonradiative recombination of the excited electron-hole, providing important insights into the CI-promoted nonradiative de-excitations and the luminescence tuning of relevant materials. In addition, it shows the feasibility of utilizing nonadiabatic excited-state dynamics simulations to investigate the photophysical processes of the excited states of graphene nanomaterials.     

Fluxional Bonds in Planar B19−, Tubular Ta@B20−, and Cage-Like B39−

Based on detailed bonding analyses on the fluxional behaviors of planar B₁₉⁻, tubular Ta@B₂₀⁻, and cage-like B₃₉⁻, we propose the concept of fluxional bonds in boron nanoclusters as an extension of the classical localized bonds and delocalized bonds in chemistry. © 2018 Wiley Periodicals, Inc.     

原位氧化还原沉淀水热合成法制备LixMn2O4尖晶石

Li xMn2O4尖晶石是新一代的锂离子二次电池正极材料 [1], 其合成方法对材料的电化学性质影响很大[2].常规合成大多采用高温固相反应法, 此法具有反应温度高, 反应时间长, 容易产生缺陷和产物不纯净等缺点, 导致所合成的锂离子二次电池正极材料的性能较差. 目前用水热合成法制备电池正极材料Li xMn2O4尖晶石尚未见文献报道. 本文在常规水热合成法的基础上采用原位氧化还原沉淀水热合成法 [3]制备前驱物, 该法合成条件更温和, 而且使材料的综合性能得到了改善和提高.      

新型稀土杂多蓝的合成及其抗艾滋病病毒(HIV-1)活性和毒性研究

合成Keggin结构钨硅、钨锗、钨磷、钨坤两电子及四电子稀土钐盐杂多蓝，铈量滴定及元素分析方法确定了化合物的还原电子数及化学组成，采用IR，UV－Vis,^183W NMR和ESR等对其结果进行了表征，在人T淋巴MT－4内，对合成的化合物进行了系统的抗艾滋病毒（HIV－1）活性及毒性测定，发现Keggin结构钨硅、钨锗四电子稀土钐盐杂多蓝具有较强的抗HIV－1活性，其中钨锗酸钐四电子杂多蓝（代号HPBR－2）具有较高的治疗指数。     

Cloning of Promoter of Chinese Bean GRP 1.8 Gene and Characterization of Its Function in Transgenic Tobacco Plants

IntroductionVascular cells that are determined to becometracheary elements undergo a very distinct celldifferentiation.In contrast to many other types ofplant cells that can dedifferentiate and evenultimately form a new plant,cells determined tobecome tracheary elements are programmed to die.Glycine- rich proteins belong to a class ofstructural cell wall proteinsthatcontain about60 %glycine on the molar basis. Glycine- rich proteinsare localized in cell walls of bean[1] .Glycine- richprotein1…     

Synthesis of Thiourea Derivatives on Soluble Polymeric Support

A modified poly(ethylene glycol) (PEG) has been developed as the soluble polymeric supports for liquid phase synthesis of novel thiourea derivatives.In each step of the sequence,the PEG-bound products were precipitated in cold Et2O and the unreacted materials and by-products were removed by simple filtration.The progress of reaction,purity of the isolation and the structure of the PEG-bound products were easily monitored by TLC,IR and ^1H NMR spectra.Representative thiourea derivatives were obtained in moderate yields with excellent purity from this modified PEG-bound product by the cleavage with 50% TFA/H2O.