ABSTRACT
Objective@#To explore the improvement influence of three combined exercise programs on sleep quality among college students with sleep disorders, so as to provide reference for the construction of exercise intervention programs for sleep disorder.@*Methods@#A total of 35 college students with sleep disorders were randomly divided into AR group ( n =10), AM group ( n =8), RM group ( n =9) and CG group ( n =8). The three exercise groups were provided with exercise intervention for 8 weeks, 3 times/week , 60 min/time, and the CG group maintained previous lifestyle.Before and after the intervention,evaluation of subjective sleep quality and reduction rate of sleep disorder by PSQI, and Actigraph GT3X+ was used to monitor the changes in the objective sleep quality.@*Results@#After the intervention,the total score of PSQI ( t =3.49, 2.31, 2.73), sleep quality score ( t =2.71, 3.00 , 5.29),sleep duration of AR group ( t =2.74), daytime dysfunction of AM group ( t =2.64) and sleep duration of RM group ( t = 2.29) significantly decreased ( P ＜0.05); The scores of sleep duration in AM group were significantly lower than those in AR group, and the scores of PSQI,sleep quality and daytime dysfunction in AM group were significantly lower than those in CG group (P<0.05). After intervention,TST ( t =-4.41, -8.37, -6.79) and SE ( t =-4.40, -5.86, -4.91) of AR group, AM group and RM group significantly increased( P <0.05), SOL ( t =4.18, 9.93), WASO ( t =2.91, 3.46) and NA ( t =4.80, 3.37) of AM group and RM group significantly decreased ( P <0.05). The changes of TST,SE and WASO in RM group were significantly higher than those in CG group, and SOL was significantly lower than those in CG group ( P <0.05).@*Conclusion@#The three kinds of combined exercise programs can improve the subjective and objective sleep quality of college students with sleep disorders, and reduce the incidence of sleep disorders; different combined exercise programs have different influence on the improvement of sleep quality of college students with sleep disorders, aerobic combined meditative movement exercise program has a prominent influence on the improvement of subjective sleep quality, and resistance combined meditative movement exercise program has a prominent influence on the improvement of objective sleep quality.
ABSTRACT
Dichromate is known for severe health impairments to organisms. New and valid strategies have been developed to rapidly detect and efficiently remove this pollutant. Constructing stable luminescent metal-organic frameworks (MOFs) for dichromate recognition and removal from aqueous solution could provide a feasible resolution to this problem. Herein, a new luminescent Zr(IV)-MOF, Zr6O4(OH)7(H2O)3(BTBA)3 (BUT-39, BUT = Beijing University of Technology) was constructed through the reaction of a newly designed functionalized T-shaped ligand 4,4',4â³-(1 H-benzo[ d]imidazole-2,4,7-triyl)tribenzoic acid (H3BTBA) with zirconium salt. BUT-39 has a unique porous framework structure, in which Zr6 cluster acts as a rare low-symmetric 9-connected node and BTBA3- as a T-shaped 3-connected linker. As far as we know, this represents the first case of a (3,9)-connected Zr(IV)-MOF. BUT-39 could retain its framework integrity in boiling water, 2 M HCl aqueous solution, and pH 12 NaOH aqueous solution. Due to its good water stability and strong fluorescent emission, BUT-39 is then employed in fluorescence sensing for various ions in aqueous solution and shows good performance toward Cr2O72- selectively, at a low concentration and a short response time (<1 min). Simultaneously, it also exhibits excellent capacity to rapidly capture Cr2O72- (within 1 min) with a high uptake up to 1 mmol g-1. Taking advantage of its excellent stability, sensitive and selective sensing, as well as rapid and high adsorption, BUT-39 is expected to be useful in Cr2O72- detection in and removal from water.
ABSTRACT
Three new water-stable In(III)-based metal-organic frameworks, namely, [In3(TTTA)2(OH)3(H2O)]·(DMA)3 (BUT-70, DMA = N,N-dimethylacetamide), [In3(TTTA)2(CH3O)3] (BUT-70A), and [In3(TTTA)2(OH)3] (BUT-70B), with rod-shaped secondary building units (SBUs) and an new acrylate-based ligand, (2E,2'E,2â³E)-3,3',3â³-(2,4,6-trimethylbenzene-1,3,5-triyl)-triacrylate (TTTA3-) were obtained and structurally characterized. BUT-70A and -70B were generated in a single-crystal to single-crystal transformation fashion from BUT-70 through guest exchange followed by their removal. The solvents used for guest exchange were methanol and dichloromethane, respectively. Single-crystal structure analyses show that the guest exchange and removal process is accompanied by the substitution of coordinated water molecules of In(III) centers with uncoordinated carboxylate O atoms of TTTA3- ligands. Moreover, hydroxyl groups bridging two In(III) centers are also replaced by methoxyl groups in the transformation from BUT-70 to -70A. Overall, three metal-organic frameworks (MOFs) are constructed by infinite chains consisting of corner-sharing InO4(OR)2 (R = H or Me) octahedral entities, which are interconnected by TTTA3- ligands to form three-dimensional frameworks. Unlike most reported MOFs with infinite chains as SBUs, such as well-known MIL-53 and M-MOF-74, which have one-dimensional channels along the chain direction, the BUT-70 series contain two-dimensional intersecting channels. The Brunauer-Emmett-Teller surface area and pore volume of BUT-70A were estimated to be 460 m2 g-1 and 0.18 cm3 g-1, respectively, which are obviously lower than those of BUT-70B (695 m2 g-1 and 0.29 cm3 g-1). Gas adsorption experiments demonstrated that BUT-70A and -70B are able to selectively adsorb C2H2 over CO2 and CH4. At 1 atm and 298 K, BUT-70A uptakes 3.1 mmol g-1 C2H2, which is 3.6 times that of the CO2 uptake and 7.2 times that of the CH4 uptake. Compared with BUT-70A, BUT-70B presents an even higher C2H2 uptake of 3.9 mmol g-1 at the same conditions, but slightly lower Ideal Adsorbed Solution Theory C2H2/CO2 and C2H2/CH4 selectivities.