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Engineering the inter-island plasmonic coupling in homometallic Au-Au_(n)core-satellite structures

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Nano Research 2023年第7期16卷 10690-10697页

作者： Xiaoying Wu xiaoli tian Zihe Jiang Yun Wang Tingting Jiang Yuhua Feng Zhenglong Zhang Hongyu Chen Institute of Advanced Synthesis School of Chemistry and Molecular EngineeringNanjing Tech UniversityNanjing 211816China School of Science Westlake UniversityHangzhou 310024China School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710062China

We show that through strong ligand mediated interfacial energy control between Au seeds and the deposited Au,the non-wetting growth of Au on Au seeds led to the formation homometallic core-satellite *** modulate the intraparticle plasmonic coupling between the core and the satellites,the number and size of the Au satellites,and their inter-island distances were continuously tuned by varying the growth *** a result of the precise structural control,the plasmonic absorptions of the core-satellite nanostructures were tuned from visible to near-infrared(NIR)spectral range,and the extent of spectral modulation(500-1300 nm)is among the best of the literature *** synthetic advance enriches the toolbox for nanosynthesis and points to a new direction in the exploration of sophisticated functional designs.

关键词： Au heterostructure core-satellite localized surface plasmon resonance(LSPRs) intraparticle coupling strong ligand near-infrared(NIR)absorptions

Preparation of Active MgO and High Purity Sintered Magnesia from Microcrystalline Magnesite

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China's Refractories 2018年第4期27卷 6-12页

作者： tian xiaoli LI Zhixun FENG Runtang YANG Shu Puyang Refractories Group Co. Ltd.

In order to widen the application of microcrystalline magnesite,the thermal decomposition behavior of the microcrystalline magnesite in Sichuan and Tibet area was firstly studied by thermogravimetric analysis. Then the effects of the calcination temperature,calcination time and particle size on the preparation of active Mg O from microcrystalline magnesite were studied by orthogonal experimental design. At last,high purity sintered magnesia was prepared by two-step calcination,meanwhile the effects of the light burning temperature,particle size of the light-burned Mg O powder,molding pressure and the hydration rate of light-burned Mg O powder on the properties of high purity sintered magnesia were *** results show that:（ 1） the calcination temperature has the greatest influence on the activity of light-burned MgO,followed by the holding time and the particle size;the optimal process of light burning for preparing active MgO is the microcrystalline magnesite with particle size of 1-0. 5 mm heat-treating at 700 ℃ for 2 h; under these conditions,the microcrystalline magnesite decomposes completely; the average grain size of the obtained product is about 21. 4 nm,and its activity of CAA is20. 16 s;（ 2） the effect of the light burning temperature on the density of high purity sintered magnesia is not obvious; the fineness of the light burning Mg O powder and molding pressure help to increase the density of sintered magnesia; the lower the hydration rate of the lightburned Mg O, the higher the density of the sintered magnesia; the high-purity sintered magnesite withw（ MgO） ≥98% and bulk density≥3. 40 g/cm;can be prepared by the two-step calcination; the grains are fine with size of 30-200 μm and the impurity at grain boundaries is little.

关键词： microcrystalline magnesite active magnesia orthogonal experimental design two-step calcination high purity sintered magnesia

Preparation of Light-burned MgO by Microcrystalline Magnesite and Its Application Prospect Analysis

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China's Refractories 2017年第4期26卷 7-11页

作者： tian xiaoli FENG Runtang LI Zhixun JIN Ru Puyang Refractories Group Co. Ltd.Puyang 457100China

In order to widen the application of microcrystalline magnesite, the microcrystalline magnesite in Sichuan and Tibet area was used as the raw material to prepare light-burned MgO at 700,800,900, 1 000, 1 100 and I 200 ~C for 3 h, respectively. Then the physical and chemical properties of the light-burned MgO were detec- ted, and its application prospect was analyzed. The re- sults show that：（1） microcrystalline magnesite com- pletely decomposes forming light-burned MgO calcined at the temperature range of 700 - 1 200 ~C ; the MgO con- tent of the light-burned MgO is higher than 96. 51% ; the chemical activity is 88 - 130 s and the grain size is 40 - 200 nm ; it has the advantages of high purity, high activity and fine grain; （2） the light-burned MgO pre- pared with microcrystalline magnesite can be widely used in many industries; it can be used in refractories indus- try to prepare high-purity sintered magnesia and large crystal fused magnesia, or as an additive for refractory products, etc. ; it can also be used in magnesium chemi- cal industry to prepare electrical grade magnesia, sili- con-steel magnesia, environmental friendly flame retard- ant magnesium hydroxide, magnesium sulfate fertilizer, pharmaceutical grade magnesia, food grade magnesia, etc.

关键词： microcrystalline magnesite light-burnedmagnesia properties application prospect

The efficacy of chemical topping in field-grown cotton is mediated by drip irrigation amount in irrigated agricultural area

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Journal of Cotton Research 2022年第2期5卷 173-184页

作者： tian Yu LIAO Baopeng HAN Huanyong WANG Fangyong DU Mingwei tian xiaoli LI Zhaohu Xinjiang Academy of Agricultural and Reclamation Science Shihezi 832003XinjiangChina College of Agronamy/Crop Chemical Control Research Center China Agricultural UniversityBeijing 100193China Callege of Agron-omy Shihezi UniversityShihezi 832000XinjiangChina.

Background:Cotton production in China is challenged by high labor input including manual topping(MT).Recently,to replace MT in the Xinjiang cotton region of China,mepiquat chloride(MC)was applied once more than the traditional multiple-application;this was designated as chemical topping(CT),but it is unclear whether the amount of irrigation needs to be adjusted to accommodate ***:The main plots were assigned to three drip irrigation amounts[300(I_(1))480(I_(2)), and 660(I_(3))mm],and the subplots were assigned to the CT treatments[450(MC)750(MC_(2)),and 1050(MC_(3))mL·hm^(-2)25%MC]with MT as a control that was performed after early *** optimum drip irrigation amount for CT was explored based on leaf photosynthesis,chlorophyll fluorescence,biomass accumulation,and *** were significant influe nces of drip irrigation,topping treatme nts and their interaction on chlorophyll fluorescence characteristics,gas exchange parameters and biomass accumulation characteristics as well as *** combination of I_(2) and MC_(2)(I_(2)MC_(2))performed *** with I_(2)MC_(2)the net photosynthetic rate(Pn),stomatai conductance(Gs),transpiration rate(Tr),and photochemical quenching coefficient(qP)of I_(2)MC_(2)significantly increased by 4.0%~7.2%,6.8%〜17.1%,5.2%~17.6%,and 4.8%~9.6%,respectively,from the peak flowering to boll opening ***,I_(2)MC_(2) showed fast reproductive organ biomass accumulation and the highest seed cotton yield;the latter was 6.6%~12.8%higher than that of I_(2)*** analysis revealed that a 25%MC emulsion in water(MCEW)application resulted in yield improvement by increasing Pn,φPSⅡ,and qP to promote biomass accumulation and transport to reproductive ***:The results showed that the 480 mm drip irrigation combined with 750 mL·hm^(-2)MC increased the rate of dry matter accumulation in reproductive organs by increasing Pn,φPSⅡ and qP to improve photosynthetic performance,thus achieving higher yield.

关键词： Cotton Irrigation amount Chemical topping Photosynthesis Biomass accumulation

An isopentyl transferase gene driven by the senescence-inducible SAG12 promoter improves salinity stress tolerance in cotton

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Journal of Cotton Research 2019年第3期2卷 133-141页

作者： SHAN Yi ZHAO Peng LIU Zhao LI Fangjun tian xiaoli College of Agronomy and Biotechnology China Agricultural University

Background:Soil salinity seriously affects cotton growth,leading to the reduction of yield and fiber ***,genetic engineering has become an efficient tool to increase abiotic stress tolerance in ***:In this study,isopentyl transferase(IPT),a key enzyme involved in cytokinin(CTK) biosynthesis from Agrobacterium tumefaciens,was selected to generate transgenic cotton via Agrobacterium-mediated transformation.A senescence-inducible SAG12 promoter from Arabidopsis was fused with the IPT ***-expression of SAG12::IPT significantly promoted seed germination or seedling tolerance to salt *** IPTtransgenic lines,OE3 as a tolerant line during seed germination,and OE8 as a tolerant line at seedling stage,were selected for further physiological *** data showed that ectopic-expression of SAG12::IPT induced the accumulation of CTKs not only in leaves and roots,but also in germinating ***,ectopic-expressing IPT increased the activity of antioxidant enzymes,which was associated with the less reactive oxygen species(ROS) accumulation compared with control ***,ectopic-expression of IPT produced higher K^+/Na^+ratio in cotton shoot and root Conclusion:The senescence-induced CTK accumulation in cotton seeds and seedlings positively regulates salt stress partially by elevating ROS scavenging capability.

关键词： Isopentyl transferase(IPT) Cytokinin(CTK) Transgenic Salt tolerance Cotton

GhKT2: a novel K^+ transporter gene in cotton(Gossypium hirsutum)

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Frontiers of Agricultural Science and Engineering 2018年第2期5卷 226-235页

作者： Yiru WANG Juan XU Mingcai ZHANG xiaoli tian Zhaohu LI Department of Agronomy College of Agronomy and Biotechnology China Agricultural University

Potassium is an essential nutrient for plant growth and productivity of crops. K+transporters are important for K+uptake and transport in plants. However,information on the function of K+transporters and K+channels in cotton is limited. The KT/KUP/HAK protein family is essential for a variety of physiological processes in plants, including nutrient acquisition and regulation of development. This study, identified a K+transporter gene,Gh KT2, expressed in the roots of cotton(Gossypium hirsutum) cv. Liaomian17. The deduced transcript of Gh KT2 is highly homologous to Cluster II of KUP/HAK/KT K+transporters and is predicted to contain 11 transmembrane domains. Gh KT2 has been localized to the plasma membrane, and its transcripts were detected in roots, stems, leaves and shoot apices of cotton ***, b-glucuronidase(GUS) expression driven by the Gh KT2 promoter could be detected in roots, mesophyll cells, and leaf veins in transgenic Arabidopsis. In addition,the expression of Gh KT2 was induced by low K+stress in cotton roots and p Gh KT2::GUS-transgenic Arabidopsis seedlings. The Gh KT2-overexpression Arabidopsis lines plants were larger and showed greater K+accumulation than the wild type(WT) regardless of K+concentration supplied. The net K+influx rate, measured by the noninvasive micro-test technique, in root meristem zone of Gh KT2-transgenic Arabidopsis lines was significantly greater than that of WT. Taken together, this evidence indicates that Gh KT2 may participate in K+acquisition from low or high external K+, as well as K+transport and distribution in plants.

关键词： cotton GhKT2 potassium transporter uptake

The GhREV transcription factor regulate the development of shoot apical meristem in cotton(Gossypium hirsutum)

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Journal of Cotton Research 2020年第1期3卷 46-53页

作者： YANG Doudou AN Jing LI Fangjun ENEJI A.Agrinya tian xiaoli LI Zhaohu Department of Crop Physiology and Cultivation College of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193China Department of Soil Science Faculty of AgricultureForestry and Wildlife Resources ManagementUniversity of CalabarCalabarNigeria

Background:Manual topping is a routine agronomic practice for balancing the vegetative and reproductive growth of cotton(Gossypium hirsutum)in China,but its cost-effectiveness has decreased over ***,there is an urgent need to replace manual topping with new approaches,such as biological *** this study,we examined the function of Gh REV transcription factors(a classⅢhomeodomain-leucine zipper family,HD-ZIPⅢ)in regulating the development of shoot apical meristem(SAM)in cotton with the purpose of providing candidate genes for biological topping of cotton in the ***:We cloned four orthologous genes of At REV in cotton,namely Gh REV1,Gh REV2,Gh REV3,and Gh *** the Gh REVs expressed in roots,stem,leaves,and *** with Gh REV1 and Gh REV3,the expression level of Gh REV2 and Gh REV4 was higher in the ***,only Gh REV2 had transcriptional *** REV2 is localized in the nucleus;and silencing it via virus-induced gene silencing(VIGS)produced an abnormal *** key genes,Gh WUSA10 and Gh STM,which involved in regulating the development of plant SAM,showed about 50%reduction in their transcripts in VIGS-Gh REV2 ***:Gh REV2 positively regulates the development of cotton SAM by regulating Gh WUSA10 and Gh STM potentially.

关键词： Cotton Revoluta(REV) Shoot apical meristem(SAM) Virus induced gene silencing(VIGS)

Growth,leaf anatomy,and photosynthesis of cotton(Gossypium hirsutum L.)seedlings in response to four light-emitting diodes and high pressure sodium lamp

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Journal of Cotton Research 2024年第1期7卷 79-89页

作者： ZHANG Yichi LIAO Baopeng LI Fangjun ENEJI AEgrinya DU Mingwei tian xiaoli Engineering Research Center of Plant Growth Regulator Ministry of EducationCollege of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193China Department of Soil Science Faculty of AgricultureForestryand Wildlife Resources ManagementUniversity of CalabarCalabarNigeria

Background Light is a critical factor in plant growth and development,particularly in controlled ***-emitting diodes(LEDs)have become a reliable alternative to conventional high pressure sodium(HSP)lamps because they are more efficient and versatile in light *** contrast to well-known specialized LED light spectra for vegetables,the appropriate LED lights for crops such as cotton remain *** In this growth chamber study,we selected and compared four LED lights with varying percentages(26.44%–68.68%)of red light(R,600–700 nm),combined with other lights,for their effects on growth,leaf anatomy,and photosynthesis of cotton seedlings,using HSP lamp as a *** total photosynthetic photon flux density(PPFD)was(215±2)μmol·m-2·s-1 for all LEDs and HSP *** results showed significant differences in all tested parameters among lights,and the percentage of far red(FR,701–780 nm)within the range of 3.03%–11.86%was positively correlated with plant growth(characterized by leaf number and area,plant height,stem diameter,and total biomass),palisade layer thickness,photosynthesis rate(Pn),and stomatal conductance(Gs).The ratio of R/FR(4.445–11.497)negatively influenced the growth of cotton seedlings,and blue light(B)suppressed stem elongation but increased palisade cell length,chlorophyll content,and *** The LED 2 was superior to other LED lights and HSP *** had the highest ratio of FR within the total PPFD(11.86%)and the lowest ratio of R/FR(4.445).LED 2 may therefore be used to replace HPS lamp under controlled environments for the study of cotton at the seedling stage.

关键词： Cotton seedling Light-emitting diodes Biomass Palisade cell Photosynthesis

Introduction of Bacillus thuringiensis(Bt)gene does not reduce potassium use efficiency of Bt transgenic cotton(Gossypium hirsutum L.)

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Journal of Cotton Research 2022年第3期5卷 274-284页

作者： WANG Qianqian YAN Wei ZHANG Yichi ZHAN Manman LUO xiaoli ENEJI AEgrinya ZHANG Anhong XIAO Juanli LI Fangjun tian xiaoli State Key Laboratory of Plant Physiology and Biochemistry/College of Agronomy and Biotechnology China Agricultural UniversityNo 2 Yuanmingyuan Xi LuHaidian DistrictBeijing 100193China Shanxi Agricultural University/Institute of Cotton Research Shanxi Academy of Agriculture ScienceYuncheng 044000ShanxiChina Department of Soil Science Faculty of AgricultureForestry and Wildlife Resources ManagementUniversity of CalabarCalabarNigeria.

Background:Potassium(K)deficiency has become a common field production problem following the widespread adoption of Bacillus thuringiensis(Bt)transgenic cotton(Gossypium hirsutum L.)*** purpose of this study was to clarify whether the introduction of Bt gene directly reduces the K-use efficiency of cotton to induce K ***:The cotton variety,Jihe 321(wild type,WT)and its two Bt(Cry1Ac)-transgenic overexpression lines(OE-29317,OE-29312)were studied in field with low soil-test K+(47.8 mg·kg^(−1)).In the field with low soil-test K+,only OE-29317 had less biomass and K+accumulation than the WT at some growth *** Bt lines produced similar or even greater seed cotton yield than WT in the *** the Bt gene(~70%)in OE-29317 and OE-29312 plants was silenced by virus-induced gene silencing(VIGS),the VIGS-Bt plants did not produce more biomass than VIGSgreen fluorescent protein(control)***:The introduction of Bt gene did not necessarily hinder the K use efficiency of the cotton lines under this study.

关键词： Biomass Bt(Bacillus thuringiensis)gene Cotton(Gossypium hirsutum L.) K uptake K utilization index Yield

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