C_(60)-benzene solutions are used as a new type of nonlinear Medium for observing cw self-focusing of laser beams.Self-phase modulation of much low power laser beam has been observed.The response time of C_(60)-benzen...C_(60)-benzene solutions are used as a new type of nonlinear Medium for observing cw self-focusing of laser beams.Self-phase modulation of much low power laser beam has been observed.The response time of C_(60)-benzene solution has been measured.展开更多
We report the experimental observation of electric field induced Gso redistribution,in benzene solution by thermal blooming change of transmitted light.The pol&riz&tion of C_(60) molecules in external field is...We report the experimental observation of electric field induced Gso redistribution,in benzene solution by thermal blooming change of transmitted light.The pol&riz&tion of C_(60) molecules in external field is analyzed.展开更多
The annealing condition, AI content, and field amplitude dependences of the complex permeability for Nb-poor Finemet type alloys, Fe73.5Si13.5B9Cu1Nba-xAlx （x = 0, 0.5, 1.5, 2.0, and 3.0）, were investigated using an...The annealing condition, AI content, and field amplitude dependences of the complex permeability for Nb-poor Finemet type alloys, Fe73.5Si13.5B9Cu1Nba-xAlx （x = 0, 0.5, 1.5, 2.0, and 3.0）, were investigated using an impedance analyzer and X-ray diffraction. The results show that different AI contents lead to different optimum annealing conditions, and the A1 content exerts a distinct effect on microstructure thus resulting in a variety of real permeability value. For the samples annealed at 793 K for 0.5 h, the real permeability increases with an increase in A1 content when the AI content is below 2.0 at.%; as for those annealed at 793 K for 1 h and at 813 K for 0.5 h, an overall increase in real permeability can be obtained compared to those annealed at 793 K for 0.5 h. The permeability under different field amplitudes is also studied and it is found that the relaxation frequency in the lower frequency region tends to moving toward a higher frequency with an increase in field amplitude. All these might be because of the role of Nb in the annealing process and the solubility of AI in the amorphous matrix and nanocrystallized crystallites.展开更多
Photoacoustic spectroscopy of C60 thin film is presented.The optical band edge of solid C60 and the optical absorption coefficient at absorption edge are determined.A weak absorption shoulder at 1.70eV is observed.Whi...Photoacoustic spectroscopy of C60 thin film is presented.The optical band edge of solid C60 and the optical absorption coefficient at absorption edge are determined.A weak absorption shoulder at 1.70eV is observed.While the thickness of C60 thin film is less than 1μm,photoacoustic saturation at band edge is avoided.展开更多
We present nieasureinents of two-pho ton absorption(TPA)coefficient of C_(60) thin Hhn at 633nm.Large values of β〜5cm/W were determined.Nearly~resona.nt TPA transition around 3.76eV absorption region was discussed.
Magnetic refrigeration techniques based on the magnetocaloric effect (MCE) were demonstrated as a promising alternative to conventional vapour-cycle refrigeration.Recently, scientists focused their research on room te...Magnetic refrigeration techniques based on the magnetocaloric effect (MCE) were demonstrated as a promising alternative to conventional vapour-cycle refrigeration.Recently, scientists focused their research on room temperature magnetic refrigeration.The rare earth Gd metal is regarded as a prototype for room temperature magnetic refrigerant.Considering the various requirements in application, it is necessary to search for the magnetic refrigerant possessing qualities as good as Gd but having different Tc above or below room temperature.In this article, we report the magnetic entropy changes in Gd1 -xTx(T = Ti, Cr, Fe and Cu) alloys.With a small quantity of T atoms introduced in Gd, the Curie temperature increases.The values of magnetic entropy change in these alloys are almost the same as or a little less than that of Gd.But the refrigerant capacities of these alloys are obviously larger than that of Gd.All these facts suggest that Gd1-xTx(T = Ti, Cr, Fe and Cu) alloys may be good refrigerants for room temperature magnetic refrigeration.展开更多
Raman spectra during the transformation from fullerite to amorphous carbon are analyzed.The transformation temperature is obtained from intensity ratio of Stokes and anti-Stokes lines by using Placzek’s formula.The t...Raman spectra during the transformation from fullerite to amorphous carbon are analyzed.The transformation temperature is obtained from intensity ratio of Stokes and anti-Stokes lines by using Placzek’s formula.The temperature,less than 2.0 x103K,is in consistence with previous work.展开更多
In February 2018,a 2-year-old American shorthair was treated conservatively for cystitis caused by crystalluria.However,as long as drug withdrawal was proceeding,the condition would be repeated,and the condition worse...In February 2018,a 2-year-old American shorthair was treated conservatively for cystitis caused by crystalluria.However,as long as drug withdrawal was proceeding,the condition would be repeated,and the condition worsened since August.In order to diagnose and treat the sick cat,clinical examination,laboratory examination,X-ray,B-type ultrasound and other methods were used for diagnosis,and treatment was conducted according to the diagnosis results.The results showed that the cat was caused by ammoniomagnesium phosphate crystals blocking urethra,complicated with postrenal azotaemia and hyperkalemia.The relapse continued after conservative treatment,and the cat finally recovered by modifying urethra surgically.The results showed that the deficiency of drinking water,the change of urine pH,and high dietary magnesium and fiber content could promote the occurrence of the disease.For the problem of urethral obstruction that could not be solved by conservative treatment,operation was done to modify urethral stricture.展开更多
Ni-doped ZnO thin films (Ni concentration up to 10 mol%) were generated on Si (100) substrates by a sol-gel technique. The films showed wurtzite structure and no other phase was found. The chemical state of Ni was fou...Ni-doped ZnO thin films (Ni concentration up to 10 mol%) were generated on Si (100) substrates by a sol-gel technique. The films showed wurtzite structure and no other phase was found. The chemical state of Ni was found to be bivalent by X-ray photoelectron spectroscopy. The results of magnetic measurements at room temperature indicated that the films were ferromagnetic, and magnetic moment decreased with rise of Ni concentration. The magnetization of Ni (10 mol%)-doped ZnO film annealed in nitrogen was lower than that annealed in argon, suggesting that the density of defects had an effect on ferromagnetism.展开更多
基金Supported by the National Natural Science Foundation of China.
文摘C_(60)-benzene solutions are used as a new type of nonlinear Medium for observing cw self-focusing of laser beams.Self-phase modulation of much low power laser beam has been observed.The response time of C_(60)-benzene solution has been measured.
基金Supported by the National Natural Science Foundation of China.
文摘We report the experimental observation of electric field induced Gso redistribution,in benzene solution by thermal blooming change of transmitted light.The pol&riz&tion of C_(60) molecules in external field is analyzed.
基金the National Basic Research Program of China (No. 2007CB209400) the Science & Technology Fund of China University of Mining & Technology (No. 2005B024)
文摘The annealing condition, AI content, and field amplitude dependences of the complex permeability for Nb-poor Finemet type alloys, Fe73.5Si13.5B9Cu1Nba-xAlx （x = 0, 0.5, 1.5, 2.0, and 3.0）, were investigated using an impedance analyzer and X-ray diffraction. The results show that different AI contents lead to different optimum annealing conditions, and the A1 content exerts a distinct effect on microstructure thus resulting in a variety of real permeability value. For the samples annealed at 793 K for 0.5 h, the real permeability increases with an increase in A1 content when the AI content is below 2.0 at.%; as for those annealed at 793 K for 1 h and at 813 K for 0.5 h, an overall increase in real permeability can be obtained compared to those annealed at 793 K for 0.5 h. The permeability under different field amplitudes is also studied and it is found that the relaxation frequency in the lower frequency region tends to moving toward a higher frequency with an increase in field amplitude. All these might be because of the role of Nb in the annealing process and the solubility of AI in the amorphous matrix and nanocrystallized crystallites.
基金the National Natural Science Foundation of China,and MAC of Nanjing University.
文摘Photoacoustic spectroscopy of C60 thin film is presented.The optical band edge of solid C60 and the optical absorption coefficient at absorption edge are determined.A weak absorption shoulder at 1.70eV is observed.While the thickness of C60 thin film is less than 1μm,photoacoustic saturation at band edge is avoided.
基金Supported by the National Natural Science Foundation of China。
文摘We present nieasureinents of two-pho ton absorption(TPA)coefficient of C_(60) thin Hhn at 633nm.Large values of β〜5cm/W were determined.Nearly~resona.nt TPA transition around 3.76eV absorption region was discussed.
基金Project supported by the National Key Project for Basic Research ( G1999064508 ) and National Natural Science Foundation of China (50271031)
文摘Magnetic refrigeration techniques based on the magnetocaloric effect (MCE) were demonstrated as a promising alternative to conventional vapour-cycle refrigeration.Recently, scientists focused their research on room temperature magnetic refrigeration.The rare earth Gd metal is regarded as a prototype for room temperature magnetic refrigerant.Considering the various requirements in application, it is necessary to search for the magnetic refrigerant possessing qualities as good as Gd but having different Tc above or below room temperature.In this article, we report the magnetic entropy changes in Gd1 -xTx(T = Ti, Cr, Fe and Cu) alloys.With a small quantity of T atoms introduced in Gd, the Curie temperature increases.The values of magnetic entropy change in these alloys are almost the same as or a little less than that of Gd.But the refrigerant capacities of these alloys are obviously larger than that of Gd.All these facts suggest that Gd1-xTx(T = Ti, Cr, Fe and Cu) alloys may be good refrigerants for room temperature magnetic refrigeration.
文摘Raman spectra during the transformation from fullerite to amorphous carbon are analyzed.The transformation temperature is obtained from intensity ratio of Stokes and anti-Stokes lines by using Placzek’s formula.The temperature,less than 2.0 x103K,is in consistence with previous work.
基金Supported by Demonstration Project of Grassroots Teaching and Research Office of Anhui Province"Grassroots Teaching and Research Office of Animal Epidemic Prevention and Quarantine"(2018jyssf038)Demonstration Project of Massive Open Online Courses of Anhui Province"Veterinary Clinical Diagnosis Technology"(2019 mooc431).
文摘In February 2018,a 2-year-old American shorthair was treated conservatively for cystitis caused by crystalluria.However,as long as drug withdrawal was proceeding,the condition would be repeated,and the condition worsened since August.In order to diagnose and treat the sick cat,clinical examination,laboratory examination,X-ray,B-type ultrasound and other methods were used for diagnosis,and treatment was conducted according to the diagnosis results.The results showed that the cat was caused by ammoniomagnesium phosphate crystals blocking urethra,complicated with postrenal azotaemia and hyperkalemia.The relapse continued after conservative treatment,and the cat finally recovered by modifying urethra surgically.The results showed that the deficiency of drinking water,the change of urine pH,and high dietary magnesium and fiber content could promote the occurrence of the disease.For the problem of urethral obstruction that could not be solved by conservative treatment,operation was done to modify urethral stricture.
基金Supported by the National Natural Science Foundation of China (Grant No.10674059)the National Basic Research Program of China (“973” Project) (Grant No.2005CB623605)
文摘Ni-doped ZnO thin films (Ni concentration up to 10 mol%) were generated on Si (100) substrates by a sol-gel technique. The films showed wurtzite structure and no other phase was found. The chemical state of Ni was found to be bivalent by X-ray photoelectron spectroscopy. The results of magnetic measurements at room temperature indicated that the films were ferromagnetic, and magnetic moment decreased with rise of Ni concentration. The magnetization of Ni (10 mol%)-doped ZnO film annealed in nitrogen was lower than that annealed in argon, suggesting that the density of defects had an effect on ferromagnetism.
