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Effects of melatonin implantation on cashmere yield,fibre characteristics,duration of cashmere growth as well as growth and reproductive performance of Inner Mongolian cashmere goats

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Journal of Animal Science and Biotechnology 2015年第4期6卷 463-468页

作者： chunhui duan Jianhai Xu Changmian Sun Zhihai Jia Wei Zhang State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural University College of Veterinary Medicine China Agricultural University

Background： Exogenous melatonin could induce cashmere growth. However, induced growth of cashmere fleece by melatonin implants cannot be combined with the typical growth, resulting in earlier shedding followed by another cycle of cashmere growth. To address this issue, we examine the effects on the cashmere yield, fibre characteristics, and the growth and reproductive performance of cashmere goats of planned administration of melatonin. Methods： Eighteen half-sib, female goats were assigned to two treatments （n = 9） including a control and a treatment where melatonin （2 mg/kg BW） was implanted at the end of April and end of June. Cashmere growth and shedding were observed for approximately ] year following implantation. Fibre samples were collected monthly to determine cumulative cashmere length. Initiation and cessation dates for cashmere growth as well as the rate of cashmere growth were calculated. Cashmere yield, weight gain of dam, kidding date, litter size, and birth weight were also recorded. Results： Melatonin implantation increased cashmere yield by 34.5 % （control 553.7 g vs. melatonin 745.0 g; P〈 0.01）, cashmere length by 21.3 % （control 95.2 mm vs. melatonin 115.4 mm; P 〈 0.01）, and decreased fibre diameter by 4.4 % （control 14.6 pm vs. melatonin 14.0 IJm; P 〈 0.03）. In melatonin-treated goats, the average initiation date was earlier than in control goats （May 18, 2013 vs. July 2, 20]3; P〈 0.01） but there was a similar cessation date （March 22, 2014 vs. March 27, 2014）. Consequently, the duration of cashmere growth was longer in melatonin-treated goats than in control goats （307 vs.270 days; P 〈 0.01）. The final BW, average daily gain, kidding date, litter size, and birth weight were not influenced by melatonin implantation. Conclusions： These data indicate that melatonin implantation （2 mg/kg BW） on two occasions （late April and June） increased cashmere yield by combining the induced growth of cashmere fleece with the typical growth and decreased the fi

关键词： Cashmere goat Cashmere yield Fibre characteristics Growth performance Melatonin,Reproductive performance

包被γ-氨基丁酸对断奶应激期羔羊血清生化指标、营养物质表观消化率及瘤胃发酵功能的影响

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动物营养学报 2024年第7期36卷 4508-4520页

作者：唐亚楠李炯魏赜赵苗苗刘月琴张英杰段春辉河北农业大学动物科技学院保定071000

本试验旨在研究饲粮中添加包被γ-氨基丁酸(GABA)对断奶应激期羔羊血清生化指标、营养物质表观消化率及瘤胃发酵功能的影响。选择48只健康、体重[(26.14±1.40)kg]相近的45日龄湖羊羔羊,随机分为4组,每组4个重复,每个重复3只羊。对照组(... 详细信息

本试验旨在研究饲粮中添加包被γ-氨基丁酸(GABA)对断奶应激期羔羊血清生化指标、营养物质表观消化率及瘤胃发酵功能的影响。选择48只健康、体重[(26.14±1.40)kg]相近的45日龄湖羊羔羊,随机分为4组,每组4个重复,每个重复3只羊。对照组(CON组)饲喂基础饲粮,试验Ⅰ、Ⅱ、Ⅲ组分别在基础饲粮中添加100、140、180 mg/d包被GABA。羔羊48日龄断奶(记为第1天),在第-3、1、3、7天采集血液测定相关指标,第-3、1、3、7、14天采集瘤胃液,第14天进行消化代谢试验。试验期为21 d。结果表明:1)与对照组相比,添加包被GABA显著降低了羔羊血清中干扰素-γ(IFN-γ)、白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)含量(P0.05);Ⅱ组酸性洗涤纤维(ADF)表观消化率显著高于Ⅰ组(P0.05);时间显著影响了羔羊瘤胃pH,氨态氮(NH 3-N)、总挥发性脂肪酸(TVFA)、乙酸、丙酸含量及乙丙比(P<0.05),pH先增加后降低,NH 3-N、TVFA、乙酸、丙酸含量先增加后短暂降低又增加,乙丙比逐渐降低。综上所述,在饲粮中添加包被GABA可降低断奶应激期内羔羊血清炎症因子含量,缓解肠道应激损伤,改善瘤胃发酵功能,提高营养物质表观消化率。在本试验条件下,包被GABA的最佳添加量为140 mg/d。

关键词：羔羊断奶免疫肠道消化率瘤胃

Synthesis of two-dimensional π-conjugated polymers pendent with benzothiadiazole and naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole moieties for polymer solar cells

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Science China Chemistry 2015年第2期58卷 257-266页

作者： Wei Li Qingduan Li Shengjian Liu chunhui duan Lei Ying Fei Huang Yong Cao Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of Technology

Four new 2D donor–acceptor conjugated polymers were designed and *** new polymers comprised fluorenealt-triphenylamine or carbazole-alt-triphenylamine as the backbones,and pendants with 2,1,3-benzothiadiazole(BT)or naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole(NT)in a triphenylamine unit as the side *** changing the acceptor BT for a stronger electron-withdrawing unit of NT moiety in the side chain,the energy levels,absorption spectra,band gaps,and charge-transport abilities of the resultant polymers could be effectively *** heterojunction solar cells with these polymers as the electron donors and(6,6)-phenyl-C71-butyric acid methyl ester as the electron acceptor exhibited high open-circuit voltage(more than 0.8 e V).The power conversion efficiency can be improved from 1.37%to 3.52%by replacing the BT with an NT moiety,which indicates that introducing NT as the side-chain building block can be an effective strategy to construct efficient 2D conjugated polymers for PSCs.

关键词： two-dimensional conjugated polymer benzothiadiazole naphthobisthiadiazole bulkheterojunction polymer solar cell

The effect of end-capping groups in A-D-A type non-fullerene acceptors on device performance of organic solar cells

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Science China Chemistry 2017年第11期60卷 1458-1467页

作者： Jianchao Jia Nannan Zheng Zhenfeng Wang Yunping Huang chunhui duan Fei Huang Yong Cao Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou 510640China

A series of novel wide bandgap small molecules(IFT-ECA, IFT-M, IFT-TH and IFT-IC) based on the A-D-A structure with indenofluorene core, thiophene bridge, and different electron-deficient end-capping groups, were synthesized and used as non-fullerene acceptors in organic solar cells. The influences of end-capping groups on the device performance were *** four materials exhibited different physical and chemical properties due to the variation of end-capping groups, which further affect the exciton dissociation, charge transport, morphology of the bulk-heterojunction films and device performance. Among them, IFT-IC-based device delivered the best power conversion efficiency of 7.16% due to proper nano-scale phase separation morphology and high electron mobility, while the devices based on the other acceptors achieved lower device performance(4.14% for IFT-TH, <1% for IFT-ECA and IFT-M). Our results indicate the importance of choosing suitable electron-withdrawing groups to construct high-performance non-fullerene acceptors based on A-D-A motif.

关键词： organic solar cells bulk-heterojunction non-fullerene acceptors end-capping groups

High open-circuit voltage organic solar cells enabled by a difluorobenzoxadiazole-based conjugated polymer donor

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Science China Chemistry 2019年第7期62卷 829-836页

作者： Ruiwen Zhang Junyi Wang Xi Liu Shuting Pang chunhui duan Fei Huang Yong Cao Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of Technology

A new polymer donor based on 3,3′-difluoro-2,2′-bithiophene(2F2T) and difluorobenzoxadiazole(ffBX), named 2F2T-ffBX, is designed and synthesized. The organic solar cell(OSC) based on 2F2T-ffBX donor and [6,6]-phenyl-C60-butyl acid methyl ester([60]PCBM) acceptor exhibits a high efficiency of 7.3% with a high open-circuit voltage(Voc) of 1.03 V. When blended with perylenediimide-based acceptor(PDI6), the corresponding OSC shows a higher Voc of 1.19 V with a low energy loss of 0.50 e V but a much lower efficiency of 2.0%. The detailed analyses including charge generation, transport, recombination properties, and morphology were performed to understand the performance of corresponding devices.

关键词： organic solar cells conjugated polymer difluorobenzoxadiazole open-circuit voltage energy loss

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果寡糖对哺乳羔羊生长性能及断奶应激的影响

动物营养学报 2024年第1期36卷 397-405页

作者：李炯唐亚楠魏赜段春辉刘月琴张英杰郭云霞纪守坤严慧河北农业大学动物科技学院保定071000 河北农业大学生命科学学院保定071000

本试验旨在研究果寡糖对哺乳羔羊生长性能及断奶应激的影响。选择15日龄体重相近的湖羊公羔44只,随机均分为4组,每组11只。对照组开食料中不添加果寡糖,试验Ⅰ、Ⅱ和Ⅲ组开食料中分别添加0.5%、1.0%和1.5%的果寡糖。试验期间记录羔羊采... 详细信息

本试验旨在研究果寡糖对哺乳羔羊生长性能及断奶应激的影响。选择15日龄体重相近的湖羊公羔44只,随机均分为4组,每组11只。对照组开食料中不添加果寡糖,试验Ⅰ、Ⅱ和Ⅲ组开食料中分别添加0.5%、1.0%和1.5%的果寡糖。试验期间记录羔羊采食量和体重,在断奶当天(第0天)、第3天和第7天采集血液样品,测定血清生化指标。羔羊60日龄断奶,断奶后继续饲喂至74日龄,试验期共59 d。结果表明:1)试验Ⅱ组羔羊结束体重和平均日增重(ADG)显著高于对照组(P<0.05)。2)第0天、第3天和第7天,试验Ⅱ、Ⅲ组血清丙二醛(MDA)含量显著低于对照组(P<0.05)。第0天和第7天,试验Ⅱ组血清超氧化物歧化酶(SOD)活性显著高于对照组(P<0.05)。第0天、第3天和第7天,试验Ⅰ、Ⅲ组血清总抗氧化能力(T-AOC)显著高于对照组(P<0.05)。3)第0天、第3天和第7天,试验Ⅰ、Ⅱ、Ⅲ组血清白细胞介素-4(IL-4)含量显著高于对照组(P<0.05),血清白细胞介素-6(IL-6)含量显著低于对照组(P<0.05);试验Ⅱ、Ⅲ组血清肿瘤坏死因子-α(TNF-α)含量显著低于对照组(P<0.05),试验Ⅱ组血清干扰素-γ(IFN-γ)含量显著低于对照组(P<0.05)。4)第3天和第7天,试验Ⅱ组血清二胺氧化酶(DAO)、D-乳酸(D-LA)和皮质醇(COR)含量显著低于对照组(P<0.05)。综上所述,在开食料中添加果寡糖可提高哺乳羔羊免疫力,缓解断奶应激,进而提高生长性能。本试验条件下,果寡糖的适宜添加量为1.0%。

关键词：哺乳羔羊果寡糖断奶应激免疫生长

果寡糖对哺乳羔羊营养物质表观消化率及粪便微生物菌群的影响

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动物营养学报 2024年第2期36卷 1096-1106页

作者：李炯唐亚楠魏赜段春辉刘月琴张英杰郭云霞纪守坤严慧河北农业大学动物科技学院保定071000 河北农业大学生命科学学院保定071000

本试验旨在研究果寡糖对哺乳羔羊营养物质表观消化率及粪便微生物菌群的影响。选择15日龄、体重相近的湖羊羔羊44只,随机分为4组:对照组开食料中不添加果寡糖,Ⅰ、Ⅱ和Ⅲ组开食料中分别添加0.5%、1.0%和1.5%果寡糖。所有羔羊60日龄断奶... 详细信息

本试验旨在研究果寡糖对哺乳羔羊营养物质表观消化率及粪便微生物菌群的影响。选择15日龄、体重相近的湖羊羔羊44只,随机分为4组:对照组开食料中不添加果寡糖,Ⅰ、Ⅱ和Ⅲ组开食料中分别添加0.5%、1.0%和1.5%果寡糖。所有羔羊60日龄断奶,记为第0天。羔羊第-7、7天进行消化代谢试验。试验期间记录羔羊腹泻情况并采集直肠粪样。断奶后继续饲喂至74日龄,试验期共59 d。结果表明:1)处理显著影响哺乳羔羊腹泻率以及腹泻频率(P0.05)。2)处理对羔羊干物质采食量(DMI)及粗蛋白质(CP)、中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)的表观消化率影响显著(P0.05)。Ⅱ组DMI显著高于对照组(P0.05)。对照组羔羊CP表观消化率显著低于各试验组(P0.05)。3)处理、时间均显著影响了羔羊粪便乳酸杆菌、双歧杆菌、大肠杆菌和沙门氏菌的数量(P<0.05)。随着试验时间的延长,各试验组羔羊乳酸杆菌和双歧杆菌数量显著高于对照组(P<0.05),大肠杆菌和沙门氏菌数量显著低于对照组(P<0.05)。处理×时间显著影响了乳酸杆菌、双歧杆菌、大肠杆菌和沙门氏菌的数量(P<0.05)。综上所述,在开食料中添加果寡糖可提高哺乳羔羊营养物质表观消化率,并可通过增加肠道有益菌数量、抑制有害菌生长,减少羔羊腹泻。本试验条件下,在哺乳羔羊饲粮中果寡糖的适宜添加量为1.0%。

关键词：羔羊果寡糖断奶表观消化率微生物菌群

A novel crosslinkable electron injection/transporting material for solution processed polymer light-emitting diodes

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Science China Chemistry 2011年第11期54卷 1745-1749页

作者： LIU ShengJian ZHONG ChengMei ZHANG Jie duan chunhui WANG XiaoHui HUANG Fei State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials ＆ Devices South China University of Technology Guangzhou 510640 China State Key Laboratory of Pulp and Paper Engineering South China University of Technology Guangzhou 510640 China

A novel crosslinkable water/alcohol soluble conjugated polymer PFN-C containing oxetane groups and aminoalkyl groups in the side chains has been developed and used as highly efficient electron injection and transporting material for polymer light-emitting diodes (PLEDs). The unique solubility in polar solvents and crosslinkable ability of PFN-C render it a good can- didate for solution processed multilayer PLEDs. It was found that PFN-C can greatly enhance the electron injection from high work-function metal cathode, due to its pendant amino groups. As a result, PLEDs with PFN-C/Al cathode exhibited compara- ble device performance to the devices with Ba/Al cathode. The resulting green light-emitting device showed promising perfor- mance with a maximum luminance efficiency of 13.53 cd A-1.

关键词： polymer light-emitting diode cross-linkable electron-transporting material water/alcohol soluble conjugated polymer

Design, synthesis and photovoltaic properties of a series of new acceptor-pended conjugated polymers

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Science China Chemistry 2016年第12期59卷 1583-1592页

作者： Zhihong Wu Yongxiang Zhu Wei Li Yunping Huang Junwu Chen chunhui duan Fei Huang Yong Cao Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of Technology

A series of novel acceptor-pended conjugated polymers featuring a newly developed carbazole-derived unit are designed and synthesized. The relationships between chemical structure and optoelectronic properties of the polymers are systematically in-vestigated. The control of UV-Vis absorption spectra and energy levels in resulting polymers are achieved by introducing suitable pended acceptor units. The photovoltaic properties of the resulting polymers are evaluated by blending the polymers with （6,6）-phenyl-CTFbutyric acid methyl ester. The resulting solar cells exhibit moderate performances with high open-circuit voltage. Charge transport properties and morphology were investigated to understand the performance of corresponding solar cells.

关键词： acceptor.pended conjugated polymers polymer solar cells band gap energy level