2,954 research outputs found

    Dietary potassium diformate (Formi) supplementation on juvenile white shrimp (Litopenaeus vannamei) diets for growth and survival support

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    Objective: This feeding trial was designed to assess the effects of formi (Dietary potassium diformate) supplementation in shrimp diet on growth and survival of  white shrimp, Litopenaeus vannamei.Methodology and results: Seven isonitrogenous diets were formulated with graded formi levels of 0, 1, 2, 4, 8, 14 and 20 mg kg-1 of dry diet, respectively. Shrimps were randomly allocated to twenty four (24) 50 l aquariums (10 shrimps of 0.82 ± 0.08 g per aquarium, eight treatments and three replicates). Water salinity was set at 17 g L-1 and the flow rate of each aquarium maintained at 2 L min-1 and decreased to 1 L min-1 at day 41th. Shrimps were exposed to 18:6 hours light/dark photoperiod. The results showed that water quality parameters did not vary significantly with the dietary supplementation and was optimal for growth and survival of L. vannamei. The maximum weight gain and survival occurred at 14 mg kg-1 formi diet. However, no significant differences were observed in percent weight gain (WG), specific growth rate (SGR), feed conversion ratio (FCR) between diets with different levels of formi supplementations. The survival rate data varied between 73.33 % and 100 %. Survival rate revealed that the commercial diet had the lowest survival. At the end of the study no significant effects on the growth, survival, feed efficiency and water quality of white shrimp, Litopenaeus vannamei was found.Keywords: Litopenaeus vannamei, Potassium diformate, growth performance, surviva

    A comparison of the effectiveness of extracorporeal shock wave therapy and ultrasound therapy on managing heel pain

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    2003-2004 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe

    Effect of extracorporeal shock wave therapy on managing heel pain

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    2003-2004 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe

    Characteristics and sources of non-methane hydrocarbons in background atmospheres of eastern, southwestern, and southern China

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    Author name used in this publication: Li, Y. S.2008-2009 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe

    Enhancement of seawater corrosion resistance in copper using acetone-derived graphene coating

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    We show that acetone-derived graphene coating can effectively enhance the corrosion efficiency of copper (Cu) in a seawater environment (0.5-0.6 M (???3.0-3.5%) sodium chloride). By applying a drop of acetone (???20 ??l cm-2) on Cu surfaces, rapid thermal annealing allows the facile and rapid synthesis of graphene films on Cu surfaces with a monolayer coverage of almost close to ???100%. Under optimal growth conditions, acetone-derived graphene is found to have a relatively high crystallinity, comparable to common graphene grown by chemical vapor deposition. The resulting graphene-coated Cu surface exhibits 37.5 times higher corrosion resistance as compared to that of mechanically polished Cu. Further, investigation on the role of graphene coating on Cu surfaces suggests that the outstanding corrosion inhibition efficiency (IE) of 97.4% is obtained by protecting the underlying Cu against the penetration of both dissolved oxygen and chlorine ions, thanks to the closely spaced atomic structure of the graphene sheets. The increase of graphene coating thickness results in the enhancement of the overall corrosion IE up to ???99%, which can be attributed to the effective blocking of the ionic diffusion process via grain boundaries. Overall, our results suggest that the acetone-derived graphene film can effectively serve as a corrosion-inhibiting coating in the seawater level and that it may have a promising role to play for potential offshore coating.close0

    Global proteomics analysis of the response to starvation in <i>C. elegans</i>

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    Periodic starvation of animals induces large shifts in metabolism but may also influence many other cellular systems and can lead to adaption to prolonged starvation conditions. To date, there is limited understanding of how starvation affects gene expression, particularly at the protein level. Here, we have used mass-spectrometry-based quantitative proteomics to identify global changes in the Caenorhabditis elegans proteome due to acute starvation of young adult animals. Measuring changes in the abundance of over 5,000 proteins, we show that acute starvation rapidly alters the levels of hundreds of proteins, many involved in central metabolic pathways, highlighting key regulatory responses. Surprisingly, we also detect changes in the abundance of chromatin-associated proteins, including specific linker histones, histone variants, and histone posttranslational modifications associated with the epigenetic control of gene expression. To maximize community access to these data, they are presented in an online searchable database, the Encyclopedia of Proteome Dynamics (http://www.peptracker.com/epd/)
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