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Self-suspended Pure Polydiacetylene Nanoparticles with Selective Response to Lysine and Arginine
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作者 Jun Luo Kai-yu Fu +1 位作者 Hai-yan Dong Dao-yong Chen 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2016年第6期749-753,I0002,共6页
We demonstrate a very convenient access to self-suspended pure poly(10,12-pentacosadiynoic acid) (PDA) nanoparticles (NPs) simply by adding the ethanol solution of diacetylene monomer to water, followed by UV ir... We demonstrate a very convenient access to self-suspended pure poly(10,12-pentacosadiynoic acid) (PDA) nanoparticles (NPs) simply by adding the ethanol solution of diacetylene monomer to water, followed by UV irradiation. The as-obtained PDA NPs are of high purity because no any initiator, catalyst or stabilizer was used during the whole process. The stabilizer-free PDA NPs are stable in the aqueous suspension. Due to the high purity and stability, the PDA NPs can respond sensitively and selectively to lysine and arginine among 18 kinds of water soluble natural amino acids; without the competitive interaction from the stabilizer, the sensitivity was enhanced. 展开更多
关键词 POLYDIACETYLENE selective response LYSINE ARGININE
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A Selective‑Response Hypersensitive Bio‑Inspired Strain Sensor Enabled by Hysteresis Effect and Parallel Through‑Slits Structures
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作者 Qun Wang Zhongwen Yao +8 位作者 Changchao Zhang Honglie Song Hanliang Ding Bo Li Shichao Niu Xinguan Huang Chuanhai Chen Zhiwu Han Luquan Ren 《Nano-Micro Letters》 SCIE EI CAS CSCD 2024年第2期139-153,共15页
Flexible strain sensors are promising in sensing minuscule mechanical signals,and thereby widely used in various advanced fields.However,the effective integration of hypersensitivity and highly selective response into... Flexible strain sensors are promising in sensing minuscule mechanical signals,and thereby widely used in various advanced fields.However,the effective integration of hypersensitivity and highly selective response into one flexible strain sensor remains a huge challenge.Herein,inspired by the hysteresis strategy of the scorpion slit receptor,a bio-inspired flexible strain sensor(BFSS)with parallel through-slit arrays is designed and fabricated.Specifically,BFSS consists of conductive monolayer graphene and viscoelastic styrene–isoprene–styrene block copolymer.Under the synergistic effect of the bio-inspired slit structures and flexible viscoelastic materials,BFSS can achieve both hypersensitivity and highly selective frequency response.Remarkably,the BFSS exhibits a high gage factor of 657.36,and a precise identification of vibration frequencies at a resolution of 0.2 Hz through undergoing different morphological changes to high-frequency vibration and low-frequency vibration.Moreover,the BFSS possesses a wide frequency detection range(103 Hz)and stable durability(1000 cycles).It can sense and recognize vibration signals with different characteristics,including the frequency,amplitude,and waveform.This work,which turns the hysteresis effect into a"treasure,"can provide new design ideas for sensors for potential applications including human–computer interaction and health monitoring of mechanical equipment. 展开更多
关键词 Bio-inspired strain sensors Hysteresis effect HYPERSENSITIVITY selective frequency response Health monitoring applications
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ZResponse to selection,heritability and genetic correlations between body weight and body size in Pacific white shrimp,Litopenaeus vannamei 被引量:6
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作者 安迪 刘小林 +1 位作者 黄皓 相建海 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2012年第2期200-205,共6页
To quantify the response to selection, heritability and genetic correlations between weight and size ofLitopenaeus vannamei, the body weight (BW), total length (TL), body length (BL), first abdominal segment dep... To quantify the response to selection, heritability and genetic correlations between weight and size ofLitopenaeus vannamei, the body weight (BW), total length (TL), body length (BL), first abdominal segment depth (FASD), third abdominal segment depth (TASD), first abdominal segment width (FASW), and partial carapace length (PCL) of 5-month-old parents and of offspring were measured by calculating seven body measurings of offspring produced by a nested mating design. Seventeen half-sib families and 42 full-sib families ofL. vannamei were produced using artificial fertilization from 2-4 dams by each sire, and measured at around five months post-metamorphosis. The results show that heritabilities among various traits were high: 0.515±0.030 for body weight and 0.394±0.030 for total length. After one generation of selection, the selection response was 10.70% for offspring growth. In the 5th month, the realized heritability for weight was 0.296 for the offspring generation. Genetic correlations between body weight and body size were highly variable. The results indicate that external morphological parameters can be applied during breeder selection for enhancing the growth without sacrificing animals for determining the body size and breed ability; and selective breeding can be improved significantly, simultaneously with increased production. 展开更多
关键词 genetic correlation GROWTH HERITABILITY Litopenaeus vannamei selection response
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Study on the Relation between Selecting and Programming Responses in PRP Paradigm
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《Journal of Modern Transportation》 1997年第2期71-78,共8页
Experiments show that programming response is one of the multimission completed simultaneously in the stage of selecting response. Therefore, a programming response does not constitute a bottleneck. The results indica... Experiments show that programming response is one of the multimission completed simultaneously in the stage of selecting response. Therefore, a programming response does not constitute a bottleneck. The results indicate that if improved performance of an overt response Ri in the set of alternative response R(i.e.RRi|i=1,2,…,n) is expected, it is necessary to simplify the average response complexity of the set. If only the complexity of operation Ri is simplified, little effect will be produced in improving performance. The response selection bottleneck is confirmed by the results of PRP (psychological refractory period) experiments. Based on the results and the selection response bottleneck model, a key assumption about working process of response selection-scanning response selection model is proposed. 展开更多
关键词 PRP paradigm selecting response programming response bottleneck.
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Responses to two-way selection on growth in mass-spawned F_1 progeny of Argopecten irradians concentricus(Say)
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作者 王辉 刘进 +2 位作者 李艳红 朱晓闻 刘志刚 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2014年第2期349-357,共9页
In the present study, the effect of one-generation divergent selection on the growth and survival of the bay scallop (Argopecten irradians concentricus) was examined to evaluate the efficacy of a selection program c... In the present study, the effect of one-generation divergent selection on the growth and survival of the bay scallop (Argopecten irradians concentricus) was examined to evaluate the efficacy of a selection program currently being carried out in Beibu Bay in the South China Sea. A total of 146 adult scallops were randomly selected from the same cultured population ofA. i. concentricus, and divided into two groups in shell length (anterior-posterior measurement): large (4.91-6.02 cm, n=74) and small (3.31-4.18 cm, n=72). At the same time, a control group was also randomly sampled (4.21-4.88 cm, n=80). Mass-spawned F1 progenies from the three size groups were obtained and reared under identical conditions at all growth phases. The effects of two-way (or upward-downward) selection on fertilization rate, hatching rate, survival rate, daily growth in shell length and body weight were assessed in the three size groups. Results show that significant differences (P〈0.01) were found in hatching rate, survival rate and daily growth of F~ progenies, but not in fertilization rate (P〉0.05), among the three groups. The hatching rate, survival rate and daily growth of the progeny of large-sized parents were greater than those of the control group (P〈0.05), which in turn were larger than those of small-sized group (P〈0.05). Responses to selection by shell length and body weight were 0.32±0.04 cm and 2.18±0.05 g, respectively, for the upward selection, and -0.14±0.03 cm and -2.77±0.06 g, respectively, for the downward selection. The realized heritability estimates of shell length and body weight were 0.38±0.06 cm and 0.22±0.07 g for the upward selection, and 0.24±0.06 cm and 0.37±0.09 g for the downward selection, respectively. The change in growth by bidirectional selection suggests that high genetic variation may be present in the cultured bay scallop population in China. 展开更多
关键词 Argopecten irradians concentricus (Say) two-way selection response to selection realized heritability F1 progeny mass-spawned
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Effect of Genetic Connectedness on the Selection Results of Breeding Pigs 被引量:1
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作者 ZHANG Hao LI Jia-qi WANG Chong LIU Xiao-hong CHEN Yao-sheng 《Agricultural Sciences in China》 CAS CSCD 2005年第11期872-876,共5页
Two pig populations were simulated with Monte Carlo method; each consisted of 5 boars and 50 sows per generation. Genetic connectedness between herds was established by randomly selecting 1 or 2 boars from one populat... Two pig populations were simulated with Monte Carlo method; each consisted of 5 boars and 50 sows per generation. Genetic connectedness between herds was established by randomly selecting 1 or 2 boars from one population to mate sows of the other population. Breeding pigs were selected within populations according to animal model BLUP. The benefits of genetic connectedness between herds were examined. The results showed that, the average coefficients of inbreeding decreased, while the cumulative selection responses of populations increased, and the higher response occurred randomly in the two populations at generation 5 with the increase of the genetic connectedness between herds. Selection response was affected by genetic connectedness and trait heritability, the lower heritability and higher connectedness, the better selection results. When the number of exchanged litters between populations per generation was 6 litters, the selection results reached a reflection point; if the number of exchanged litters between populations increased further from this point, neither the increase of the cumulative selection responses nor the decrease of coefficients of inbreeding was significant. 展开更多
关键词 PIGS Genetic connectedness Cumulative selection response Coefficient of inbreeding
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