15 resultados para 090 Manuscripts
em Chinese Academy of Sciences Institutional Repositories Grid Portal
Resumo:
The photorefractive holographic dynamics of grating formation in photochromic doubly doped LiNbO3:Fe:Mn crystal is studied numerically and analytically in terms of the two-center model of Kukhtarev Et al. [Ferroelectrics 22, 949 (1979)]. The relations among the recorded and fixed space-charge fields and the doping densities, the oxidation-reduction states of the fields, and the intensities of UV-sensitizing and red recording beams are studied. Important conditions and effects are feued, and an optimal prescription for material doping and oxidation-reduction processing is suggested in which the crystal can be strongly oxidized and the Mn-doping density is smaller than the Fe-doping density. (C) 2000 Optical Society of America. OCIS codes: 050.7330, 190.5330, 090.2900.
Resumo:
We report experimental and theoretical studies of nonvolatile photorefractive holographic recording in LiNbO3:Cu:Ce crystals with two illumination schemes: (1) UV light for sensitization and a red interfering pattern for recording and (2) blue light for sensitization and a red pattern for recording. The results show that the oxidized LiNbO3:Cu:Ce crystals can provide high, persistent refractive-index modulation with weak lightinduced scattering. The optimal working conditions and the prescription for doping and oxidation-reduction processing that yields the maximum refractive-index modulation are discussed. (C) 2000 Optical Society of America OCIS codes: 050.7330, 190.5330, 090.2900.
Resumo:
The dot matrix hologram (DMH) has been widely used in anti-counterfeiting label. With the same technology and cell array configuration, we can encode to the incidence beam. These codes can be some image matrix grating with different grating gap and different grating orientation. When the multi-level phase diffractive grating is etched, the incidence beam on the cell appears as an encoding image. When the encoded grating and DMH are used in the same label synchronously, the technology of multi-encoded grating array enhances the anti-counterfeit ability.
Resumo:
A novel wideband sensitive dry holographic photopolymer sensitized by rose bengal (RB) and methylene blue (MB) is fabricated, the holographic storage characteristics of which are investigated under different exposure wavelengths. The result shows that the sensitive spectral band exceeds 200 nm in visible light range, the maximum diffraction efficiency under different exposure wavelengths is more than 40% and decreases with the decrease of exposure wavelength, the exposure sensitivity is not change with the exposure wavelength. This photopolymer is appropriate for wavelength multiplexing or multi-wavelength recording in digital holographic storage.
Resumo:
Illiciaceae [SchisandraceaeMagnoliaceae] (Illiciales) Illicium219143247134 Sect. Illicium0.090Sect. Cymbostemon0.194d=4.690d=4.899Illiciales 2 21120Kadsura22815Schisandra24617 232 23;
Resumo:
Spermiogenesis is a unique process in mammals during which haploid round spermatids mature into spermatozoa in the testis. Its successful completion is necessary for fertilization and its malfunction is an important cause of male infertility. Here, we report the high-confidence identification of 2116 proteins in mouse haploid germ cells undergoing spermiogenesis: 299 of these were testis-specific and 155 were novel. Analysis of these proteins showed many proteins possibly functioning in unique processes of spermiogenesis. Of the 84 proteins annotated to be involved in vesicle-related events, VAMP4 was shown to be important for acrosome biogenesis by in vivo knockdown experiments. Knockdown of VAMP4 caused defects of acrosomal vesicle fusion and significantly increased head abnormalities in spermatids from testis and sperm from the cauda epididymis. Analysis of chromosomal distribution of the haploid genes showed underrepresentation on the X chromosome and overrepresentation on chromosome 11, which were due to meiotic sex chromosome inactivation and expansion of testis-expressed gene families, respectively. Comparison with transcriptional data showed translational regulation during spermiogenesis. This characterization of proteins involved in spermiogenesis provides an inventory of proteins useful for understanding the mechanisms of male infertility and may provide candidates for drug targets for male contraception and male infertility.
Resumo:
Anabarilius grahami is a cyprinoid fish endemic to Fuxian Lake, Yunnan, China. In this study, a comprehensive staging series of A. grahami was produced. The embryonic development of A. grahami was divided into six main periods: zygote period, cleavage per
Resumo:
Three new dibenzocyclooctadiene lignans, schilancifolignans A-C (1-3), together with thirteen known ones, were isolated from the leaves and stems of Schisandru lancifolia. The structures of 1-3 were elucidated by spectroscopic methods, including extensive 1D- and 2D-NMR techniques. Compounds 1-3 were tested for their anti-human immunodeficiency virus-1 activities and showed weak bioactivities.
Resumo:
16~5562,,X,16~5541(24.609.82)mg/Kg(0.780.25)(2.840.65)mg/L,(12.504.55)mg/kg(0.180.11)(2.090.64)mg/L;(1.000.52)mg/kg(0.100.10)(2.741.42)mg/L,(1.391.34)mg/kg(0.040.03)(0.870.43)mg/L;(P<0.01)ASTLDHHBDHALP(P<0.01)X50.00%,61.29%,33.87%,29.03%,8.06%;2.44%,34.15%,21.95%,2.44%,2.44%,X(P<0.01),,,
Resumo:
A simple double logarithmic method in potential-controlled thin-layer spectroelectrochemistry for an irreversible electrochemical process has been studied by numerical analysis and examined by experimental examples. This simple algorithm has a novel function offering some important information about the mechanism of a complex electrochemical process directly from a limited amount of potential-spectrum data, and can be used to distinguish different reaction mechanisms such as E, EC, EE, as well as to determine the electron-transfer coefficient, a, and the kinetically modified E-0'. Combination of the double logarithmic method with nonlinear regression provides a powerful tool to examine the proposed mechanism and also to estimate other thermodynamic and kinetic parameters. (C) 1999 The Electrochemical Society. S0013-4651(98)06-090-X. All rights reserved.
Resumo:
(SCS)-(EVA),(-OH)SCS:+(80/20W/W)S_1=42.770.08ppm,S_2=7.1550.06ppm,S_3(s)=-4.080.02ppm,S_3(t)=-3.090.02ppm,S_4=0.480.03ppm,S_5=0.260.05ppm,S_1=44.970.61ppm,S_2=7.400.00ppm,S_3(s)=-4.510.17ppm,S_3(t)=-3.130.00ppm,S_4=0.630.04ppm,S_5=0.360.00ppm,SCS~(13)C NMR
Resumo:
Fenneropenaeus chinensis is confined to the Yellow Sea and Bohai Sea in China and the West Coast of the Korean Peninsula. Intra- and intercross populations were produced between Rushany (YP) and Korean (KN) populations. Seven traits were recorded. The heterosis of hybrids was computed and comparison between treatments was performed by ANOVA. At the fourth month after post-larvae, six indexes of growth trait and viability showed a range of heterosis, ranging from 0.514% to 14.950%. At the fifth month after post-larvae, six indexes of growth trait and viability ranged from -9.000% to 19.090%. The negative heterosis was observed in CL, HST and viability. The heterosis of KN female xYP male tended generally to increase as the age of the Chinese shrimp increased while the heterosis of YP female xKN male tended to decrease. The results indicated that the viability of reciprocal hybrids were not significantly different (P > 0.05) from their parents during the experiment. The result of ANOVA indicated that the F1 hybrids were significantly different (P < 0.05) in WST and TW at the fourth month. The multiple comparisons of LSD test indicated that the hybrids of YP female xKN male were significantly different (P < 0.05) from their parents in TW. The hybrids of YP female xKN male were significantly different (P < 0.05) from the other three combinations in WST. At the fifth months, the F1 hybrids had significant difference (P < 0.05) in body weight while other traits showed no significant differences (P > 0.05) from their parents. The multiple comparisons of LSD test indicated that the hybrids of KN female xYP male were significantly different (P < 0.05) from the KN parents in TW. The results indicate that in experimental conditions, the F-1 hybrids created from two populations of Chinese shrimp showed a certain level of heterosis for growth performance and viability. The crossing scheme may improve growth performance and viability in Chinese shrimp, but the improvement may be limited because effective crossbreeding requires the maintenance of pure, preferably inbred, lines and possibly involves specialized sire and dam lines. Therefore, the exploitation of heterosis through single crossbreeding in Chinese shrimp is of limited utility in practical commercial shrimp aquaculture in spite of the potential of significant heterosis. The crossbreeding of different populations can be applied in the establishment of base populations.
Resumo:
1. WYPWKN2TLCLCW23HST23WSTBW73WYP WKN(4.37%23.96% )WYPWKNWKN WYP(X1)(X2)23(X3)(X4)23(X5)Y = 2.056 + 0.03X1 + 0.076X2 + 0.078X3 + 0.033X4 + 0.043X5 2. WYPWKN2460.514%14.95%WYPWKN7WKNWYP5-9.000%19.090%233WKNWYPWYPWKNANOVA4WSTBW2LSDWYPWKNBWWST35LSDWKNWYPWKN 3. 2WKNWYP3FKN1HH198JK98JK98 ()  WKN ()WYP () WKN ()WKN () WYP ()FKN ()HH1 () WYP () FKN ()FKN()  HH1()WKN () WYP ()WYP () WKN ()WYP ()FKN () JK98 ()WKN ()JK98 ()  WKN ()5TLCLHSTLLBW5JK98 ()WKN ()TLHSTWKN () WYP ()FKN()  HH1() WYP ()  WKN ()3BWWKN () WYP () FKN()  HH1() 4. 212146TLCLCWHSTWST1FL6LLMTDFREML0.15~0.35TL0.340.071CL0.300.070CW0.350.077WST0.330.073HST0.330.073FL0.150.044LL0.240.059CWTLHSTFLWST 5. F2AFLP55AFLPF2110532AFLP31F211283544109016171772.1 cM2420 cM32.6%AFLPAFLP
