The Experts below are selected from a list of 141 Experts worldwide ranked by ideXlab platform

Ricardo Erthal Santelli - One of the best experts on this subject based on the ideXlab platform.

  • Application of Hydrocyanic Acid vapor generation via focused microwave radiation to the preparation of industrial effluent samples prior to free and total cyanide determinations by spectrophotometric flow injection analysis.
    Analytical and bioanalytical chemistry, 2006
    Co-Authors: Maria Cristina B. Quaresma, Maria De Fátima Batista De Carvalho, Francis Assis Meirelles, Vânia Maria Junqueira Santiago, Ricardo Erthal Santelli
    Abstract:

    A sample preparation procedure for the quantitative determination of free and total cyanides in industrial effluents has been developed that involves Hydrocyanic Acid vapor generation via focused microwave radiation. Hydrocyanic Acid vapor was generated from free cyanides using only 5 min of irradiation time (90 W power) and a purge time of 5 min. The HCN generated was absorbed into an accepting NaOH solution using very simple glassware apparatus that was appropriate for the microwave oven cavity. After that, the cyanide concentration was determined within 90 s using a well-known spectrophotometric flow injection analysis system. Total cyanide analysis required 15 min irradiation time (90 W power), as well as chemical conditions such as the presence of EDTA–acetate buffer solution or ascorbic Acid, depending on the effluent to be analyzed (petroleum refinery or electroplating effluents, respectively). The detection limit was 0.018 mg CN l−1 (quantification limit of 0.05 mg CN l−1), and the measured RSD was better than 8% for ten independent analyses of effluent samples (1.4 mg l−1 cyanide). The accuracy of the procedure was assessed via analyte spiking (with free and complex cyanides) and by performing an independent sample analysis based on the standard methodology recommended by the APHA for comparison. The sample preparation procedure takes only 10 min for free and 20 min for total cyanide, making this procedure much faster than traditional methodologies (conventional heating and distillation), which are time-consuming (they require at least 1 h). Samples from oil (sour and stripping tower bottom waters) and electroplating effluents were analyzed successfully.

S.s. Kandalikar - One of the best experts on this subject based on the ideXlab platform.

Li Zaozhe - One of the best experts on this subject based on the ideXlab platform.

  • Cloning of ISSR Characteristic Fragments Related to Super Low Hydrocyanic Acid Content in SorghumSudangrass and Sequence Analysis
    Chinese Journal of Grassland, 2012
    Co-Authors: Li Zaozhe
    Abstract:

    To make clear DNA molecular characteristics of ISSR characteristic fragments related to super low Hydrocyanic Acid content in Sorghum-Sudangrass,ISSR characteristic fragment H-1,H-2 and H-3 related to super low Hydrocyanic Acid content in hybrid F2 of loose spike Sorghum×black shell Sudangrass and ISSR characteristic fragment B-1,B-2 and B-3 related to super low Hydrocyanic Acid content in hybrid F2 of loose spike Sorghum×white shell Sudangrass were cloned and sequence was tested.The results showed that whole length of the cloned fragment H-1 was 1377bp,the sequence contained a complete coding region(ORF) of 1357bp in length,located in the 743bp～1099bp region,coding 119 amino Acids,the homology of the fragment with that of wheat subspecies was 60%.Whole length of fragment H-2 was 2268bp,the sequence contained a complete coding region(ORF) of 279bp in length,located in the 735bp～1013bp region,coding 93 amino Acids,the homology of the fragment with SORBIDRAFT_05g027190 of sorghum was 63.9%,and the homology of the fragment with OsJ_07776 of rice was 62%.Whole length of fragment H-3 was 2614bp,the sequence contained a complete coding region(ORF) of 339bp in length,located in the 1024bp～1362bp region,coding 113 amino Acids.Whole length of fragment B-1 was 1432bp,the sequence contained a complete coding region(ORF) of 1300bp in length,located in the 700bp～999bp region,coding 100 amino Acids.Whole length of fragment B-2 was 1363bp,the sequence contained a complete coding region(ORF) of 228bp in length,located in the 603bp～830bp region,coding 76 amino Acids.Whole length of fragment B-3 was 2751bp,the sequence contained a complete coding region(ORF) of 1186bp in length,located in the 2534bp～2719bp region,coding 62 amino Acids.Fragment H-3,B-1,B-2 and B-3 had no homology with known plant base sequence and amino Acid sequence,they may be more closely related to super low Hydrocyanic Acid content of new DNA sequences.

  • Analysis of agronomic characteristics and chromosome configuration of new strains of sorghum-sudangrass of low Hydrocyanic Acid content
    Acta Pratacultural Science, 2012
    Co-Authors: Fang Yong-yu, Yu Zhuo, Yu Xiaoxia, Ma Yanhong, Li Xiaoyu, Li Zaozhe
    Abstract:

    In order to investigate the growth characteristics,production performance,nutritional value and cytogenetic characteristics of the four new strains of sorghum-sudangrass SLCN-11,SLCN-12,SLCN-13,SLCN-14,the main agronomic characteristics and chromosome configuration,such as the growth rate,fertility,photosynthetic performance,fresh and seed yields,Hydrocyanic Acid content,nutrients and so on,were analyzed.The four new strains grew fast and were tall,tillering ability was strong,the growth period was 130-138 d,the ear type was in middle of their parents,pollen fertility rate was above 96%,seed setting rate was 72.11%-73.34%,The chromosome pairing behavior at PMC M I was regular(2n=2x=20=10Ⅱ).The four new strains had stronger photosynthetic capacity.Their fresh and seed yields were high.The fresh and seed yields of strain SLCN-11 were the highest.The Hydrocyanic Acid content of the four new strains were low,the Hydrocyanic Acid content in fresh sorghum-sudangrass was only 5.80-10.43 mg/kg when the plant height was about 100 cm,which was safe for feeding animals.The ratio of stem to leave was low and the nutritional value was high.At the jointing stage,the crude protein content of four new strains was 14.67%-16.31%,the crude fiber content was 24.31%-24.72%,and was rich in crude fat,nitrogen free extract,calcium,phosphorus and amino Acids.

Yu Zhu - One of the best experts on this subject based on the ideXlab platform.

  • SSR analysis of sorghum-sudangrass new strains with low Hydrocyanic Acid content
    Acta Pratacultural Science, 2014
    Co-Authors: Yu Zhu
    Abstract:

    To identify the difference degree of four new strains of sorghum-sudangrass with low Hydrocyanic Acid content SLCN-11,SLCN-12,SLCN-13 and SLCN-14,and their parents at a DNA level,we conducted SSR analyses using the variety Mengnong Qingsi No. 3 as a control. A total of 12 SSR primer pairs with high polymorphism and good reproducibility were screened from 200 developed sorghum SSR primer pairs. The 10 materials were analyzed using these SSR primers. A total of 509 polymorphic loci were amplified,and the percentage of polymorphic loci was up to 87. 30%. Each SSR polymorphic primer pairs could amplify clear and stable bands,which can be used as molecular basis for identifying the four new strains of sorghum-sudangrass. Genetic distance( GD) among 10 materials ranged from 0. 3165-0. 6692,with an average of using 0. 5359; Using the GD value of 0. 50 as a threshold,the 10 materials can be clustered into five groups: Mengnong qingsi No. 3,loose spike sorghum,SLCN-11,SLCN-12 and SLCN-13; SLCN-14 and brown hull sudangrass; white hull sudangrass; black hull sudangras; red hull sudangrass. This study laid the groundwork for the next step breeding,registration and utilization of new sorghum-sudangrass varieties with low Hydrocyanic Acid content.

M. Bewersdorf - One of the best experts on this subject based on the ideXlab platform.

  • New catalytic materials for the high-temperature synthesis of Hydrocyanic Acid from methane and ammonia by high-throughput approach
    Applied Catalysis A-general, 2007
    Co-Authors: S. Moehmel, Norbert Steinfeldt, S. Engelschalt, Martin Holena, S. Kolf, Manfred Baerns, Uwe Dingerdissen, D. Wolf, R. Weber, M. Bewersdorf
    Abstract:

    For converting methane and ammonia to Hydrocyanic Acid, catalysts were prepared and tested in a 48-parallel channel fixed-bed reactor unit operating at temperatures up to 1373 K. The catalysts were synthesized with a robot applying a genetic algorithm as the design tool. New and improved catalyst compositions were discovered by using a total of seven generations each consisting of 92 potential catalysts. Thereby, the catalyst support turned out as an important input variable. Furthermore, platinum, which is well known as a catalytic material was confirmed. Moreover, improvements in HCN yield were achieved by addition of promoters like Ir, Au, Ni, Mo, Zn and Re. Multi-way analysis of variance and regression trees were applied to establish correlations between HCN yield and catalyst composition (support and metal additives). The obtained results are considered as the base for future even more efficient screening experiments.