Investigating the Structure-property Relationships of Two Cd-based Hybrid Multifunctional Compounds with High Tc, Bright Fluorescence and Wide Band-gap.

Organic-inorganic hybrid multifunctional materials have shown significant application in lighting and sensor fields, owing to their prominent performance and diversity structures. Herein, we synthesized two multifunctional compounds: (propyl-quinuclidone)2 CdBr4 (1) and (F-butyl-quinuclidone)2 CdBr4 (2). By introducing light-emitting organic cation with flexible long chain, 1 and 2 exhibit excellent transition properties and bright blue-white fluorescence. Then, combine fluorescence lifetime and first-principal calculation, providing evidence for the electron transfer emission. Subsequently, investigated the impact of substituent carbon chain length (methyl to butyl), structural rigidity (C-C to C-F) and halide framework (Cl to I) on the fluorescence properties. Results indicate that Cd⋅⋅⋅Cd distance and structural rigidity play an important role in fluorescence. Overall, our research provides valuable insight and example for chemical modifications enhance compound performance.

High-Temperature Ferroelasticity and Photoluminescence in a 2D Monolayer Perovskite Compound: (C5NH8Br)2PbBr4.

Hybrid organic-inorganic perovskites (HOIPs) have attracted much attention due to their excellent properties and easy synthesis. As far as we know, most documented ferroelastics mainly focus on the 3D (three-dimensional) perovskites, the 2D monolayer perovskite ferroelastics are rarely reported before. In this work, we synthesized a 2D lead-based perovskite (C5NH13Br)2PbBr4 (1) (C5NH13Br = 5-bromoamylamine cation) by introducing flexible chain organic cations. The evolution of ferroelastic domains observed by a polarized light microscope confirms that compound 1 undergoes a ferroelastic phase transition at 392/384 K. In addition, its direct band gap is 2.877 eV. Interestingly, the material emits an attractive blue light (quantum yield 5.06%) under UV light. Three structural descriptors are introduced to quantitatively analyze the relationship between structural distortion and the shape of emission peak. This work provides a way to design multifunctional perovskite-type materials.

Study of enrichment factors for six ß-blockers in aliphatic alcohols by hollow-fiber liquid-phase microextraction.

The selectivity of a suitable organic solvent is key for extraction in liquid-phase microextraction experiments. Nevertheless, the screening process remains a daunting task. Our research aimed to study the relationship between extraction efficiency and extraction solvents, analytes, and finally select the appropriate extraction solvent. In the present article, ß-blockers and six extraction solvents were chosen as the models and hollow-fiber liquid-phase microextraction was conducted. The relationship was built by statistical analysis on the data. Factors affecting extraction efficiency including the logarithms of the octanol/water partition coefficient (logPo/w ) of analytes, acid dissociation constants, the logarithms of the octanol/water partition coefficient of solvents and pH of the sample solution were investigated. The results showed that a low water solubility of extraction solvent is the foundation to ensure higher extraction efficiency. Moreover, when ΔlogPo/w > 0, a higher extraction efficiency is observed at lower ΔlogPo/w , on the contrary, when ΔlogPo/w < 0, extraction efficiency is higher as the absolute value of ΔlogPo/w becomes greater. Finally, the relationship between enrichment factor and extraction solvents, analytes was established and a helpful guidance was provided for the selection of an optimal solvent to obtain the best extraction efficiency by liquid-phase microextraction.

[Determination of residual aluminium Ion in Huoxiang Zhengqi pellets by GFAAS with EDTA complexation extraction].

To establish an EDTA complexation extraction pretreatment combining with GFAAS method for the determination of residual aluminium ion in Huoxiang zhengqi pellets without digestive treatment, systematical investigation was made on sample preparation, and EDTA was used for the complexation extraction of residual aluminium ion in samples. The pH, concentration and volume of extraction solution, the temperature and time of microwave extraction, and graphite furnace temperature program were investigated. The results were compared with the microwave digestion. It was showed that, 0.1 g of sample weight was added in 20 mL 0.05 mol x L(-1) EDTA solution (pH 3.5), followed by heating at 150 degrees C for 10 min in the microwave extraction device. The determination of GFAAS was performed at optimized detection wavelength (257.4 nm) as well as graphite furnace temperature program, the detection limits and quantification limits were 2.37 µg x L(-1) and 7.89 µg x L(-1), respectively. The precision (RSD) was less than 2.3%. The average recovery was 96.9% -101%. The present method is easy, rapid and accurate for the determination of residual aluminium ion in Huoxiang zhengqi pellets.

Moxibustion improves motor function by down-regulating SNX5 and inhibiting ferroptosis in neurons of corpus striatum in mice with Parkinson's disease. / 艾灸调控SNX5å¯¹å¸•é‡‘æ£®ç— æ¨¡åž‹å°é¼ ç¥žç»å ƒé“æ­»äº¡çš„å½±å“.

OBJECTIVES: To explore the effect of moxibustion on the expression of sorting nexin 5 (SNX5), glutathione peroxidase (GPX4) and ferritin heavy chain (FTH1) in the corpus striatum in mice with Parkinson's disease (PD), so as to explore its mechanisms underlying improvement of PD by ameliorating ferroptosis in the substantia nigra striatum. METHODS: C57BL/6J mice were randomly divided into normal, sham operation, model, and moxibustion groups, with 10 mice in each group. The PD model was established by unilateral injection of 6-hydroxydopamine (3.5 µL) into the right medial forebrain bundle (AP=-1.2 mm, ML=-1.3 mm, DV=-4.75 mm). The mice in the moxibustion group received moxibustion at "Baihui"(GV20) and "Sishencong"(EX-HN1) for 20 min each time, once a day, 6 times a week for 4 weeks. After the intervention, mice received apomorphine rotation behavior detection and pole climbing test. The expression of tyrosine hydroxylase (TH) in the substantia nigra was detected by immunofluorescence, the contents of Fe2+, malondialdehyde (MDA), the ratio of glutathione/oxidized glutathione (GSH/GSSG) in the corpus striatum were detected by using photocolorimetric method, and the expression levels of SNX5 (endocytosomal protein), GPX4 (one of the key targets for inhibiting ferroptosis) and FTH1 proteins and mRNAs in the corpus striatum were detected by Western blot and qPCR, respectively. RESULTS: Behavior tests showed that the pole climbing time and number of body rotation were significantly increased in the model group relevant to the sham operation group (P<0.01), and strikingly decreased in the moxibustion group relevant to the model group (P<0.01). The immunofluorescence intensity of TH in the substantia nigra, the ratio of GSH/GSSG, and the expression levels of GPX4 and FTH1 mRNAs and proteins in the corpus striatum were markedly decreased (P<0.01, P<0.05), while the contents of Fe2+ and MDA and the expression levels of SNX5 mRNA and protein in the corpus striatum significantly increased in the model group relevant to the sham operation group (P<0.01, P<0.05). Compared with the model group, the decreased immunofluorescence intensity of TH, GSH/GSSH, and the expression levels of GPX4 and FTH1 mRNAs and proteins, and the increased contents of Fe2+ and MDA and the expression levels of SNX5 mRNA and protein were reversed in the moxibustion group relevant to the model group (P<0.01, P<0.05). CONCLUSIONS: Moxibustion may improve motor dysfunction in PD mice, which may be related to its effects in down-regulating the expression of SNX5, promoting the synthesis of GSH, decreasing the contents of Fe2+ and MDA, up-regulating the ratio of GSH/GSSG and the expression of GPX4 and FTH1 mRNAs and proteins in the corpus striatum, and inhibiting the occurrence of ferroptosis.

[FU Wen-bin's experience in treatment of depression complicated with obsessive-compulsive disorder from perspective of heart and gallbladder].

Based on the thinking of integrative and holistic acupuncture and moxibustion, FU Wen -bin proposes to treat depression complicated with obsessive-compulsive disorder from perspective of heart and gallbladder. In clinical practice, the treatment pattern of "acupuncture at the top priority, followed by moxibustion, and consolidation at the end" is applied, acupuncture, refined moxibustion, intradermal needle and other therapies are comprehensively adopted, acupoints on the heart meridian, pericardium meridian and gallbladder meridian are selected or back-shu points and front-mu points of the heart, gallbladder and pericardium are matched, and the acupoints on the conception vessel and governor vessel and with the functions of tonifying kidney and regulating qi are added to calm the heart and tranquilize the mind, so as the symptoms of depression and obsessive-compulsive can be effectively relieved.

The complete genome sequence of Bacillus velezensis 9912D reveals its biocontrol mechanism as a novel commercial biological fungicide agent.

A Bacillus sp. 9912 mutant, 9912D, was approved as a new biological fungicide agent by the Ministry of Agriculture of the People's Republic of China in 2016 owing to its excellent inhibitory effect on various plant pathogens and being environment-friendly. Here, we present the genome of 9912D with a circular chromosome having 4436 coding DNA sequences (CDSs), and a circular plasmid encoding 59 CDSs. This strain was finally designated as Bacillus velezensis based on phylogenomic analyses. Genome analysis revealed a total of 19 candidate gene clusters involved in secondary metabolite biosynthesis, including potential new type II lantibiotics. The absence of fengycin biosynthetic gene cluster is noteworthy. Our data offer insights into the genetic, biological and physiological characteristics of this strain and aid in deeper understanding of its biocontrol mechanism.

A new simultaneous derivatization and microextration method for the determination of memantine hydrochloride in human plasma.

A simple and sensitive method for simultaneous derivatization and hollow fiber liquid phase microextraction (HF-LPME) followed by high performance liquid chromatography-fluorescence detection (HPLC-FL) to determine memantine hydrochloride (MT) in human plasma was developed. The derivatization and microextraction was combined to a single step to ensure the precision. What is more, the derivatization reaction accelerated the mass transfer during the process of microextraction. The hollow fiber was filled with cyclohexane and dansyl chloride (derivatization agent) as acceptor phase and submersed in the alkalinized plasma sample. The system was submitted to stirring at 800rpm for 50min at 40°C. Different experimental parameters were systematically evaluated by response surface methodology. Under the optimized conditions, the calibration curve was linear in the range of 1-100ng/mL (r=0.9991) with a limit of detection of 0.1ng/mL (S/N=3). The precision estimated as the relative standard deviation (RSD) was less than 4.5% and the accuracy was 94.3-100.7%. The present method was successfully applied to determine MT in human plasma samples.

Patterned biocatalytic films via one-step self-assembly.

Patterned porous films containing enzymes have been facilely prepared via a one-step breath figure process, which is based on the self-assembly of horseradish peroxidase nanoparticles that show good resistance to organic solvents. The patterned biohybrid films possess robust catalytic activity.