188 Evaluation of Alternative Summer Feeding Strategies to Optimize Performance in High Lean Genetics Using Energy, Narasin and Phytonutrient Blend Individually, Or, in Combination

The objective of this study was to determine the effects of feeding medium energy diets together with feed ingredients (Narasin-Skycis, Elanco Animal Health, Greenfield, IN; Phytonutrient blend-LeanFuel, Furst-McNess Company, Freeport, IL) as compared to low and high energy diets in high lean genetics during the summer. A total of 1375 pigs (PIC 337×PIC 1050; average 32.92 kg) were used in the experiment and were randomly assigned within block to 1 of 5 treatments by weight and gender, and 5 diet phases were formulated to meet and exceed NRC 2012 requirements, and formulated to a constant Lysine:NE ratio using corn, soybean meal and fat as low-energy, 3307 kcal/kg ME (L), moderate-energy, 3362 kcal/kg (M) and high-energy, 3417 kcal/kg ME (H) diets, and the trial ran from 32.92 kg to slaughter. Treatments 1) L 2) H 3) M with 1135 g/ton of LeanFuel added from 81.65 kg onwards 4) M with 13.6 g/ton Narasin throughout 5) M with 13.6 g/ton Narasin throughout and LeanFuel added from 81.65 kg onwards. Data were analyzed using the PROC GLIMMIX of SAS with pen serving as the experimental unit and blocks included in random effects. There was no difference in removals (P = 0.934). There was no difference in ADG between L and H, but H improved G:F by 2.5% (P < 0.01) as expected. ADG was intermediate for M+LF and M+Nar, with M+Nar+LF having a significantly greater ADG than both L and H by 4.8% for the overall period (P < 0.01). Feed efficiency was significantly lower for H, M+LF, M+Nar and M+Nar+LF as compared to L, but there was no difference for G:F between H and M+LF, M+Nar and M+Nar+LF. Gain per pig was increased by M+Nar+LF by 5.1 kg and 4.5 kg over L and H, respectively (P < 0.01). The combined use of Nar and LF offer an approach to supporting growth rate during the summer.

Comparison of growth performance of live feed microalgae and rotifer (Brachionus sp.) under different feeding medium in outdoor culture condition

Live feed is the basic food source and nutrient security for successful seed production of any commercially important aquaculture species of fishes, mollusks and crustaceans. Both plant and animal originated aquatic microscopic organisms are generally termed as live food. They are the basic food items in early stages (larval stage) of life cycle due to small sizes, easy digestibility and enriched in nutrients. The Nannochloropsis sp.; Nannochlorum sp. and Tetraselmis sp. are rich with relatively high content of essential fatty acids in comparison to other marine algae. Likelihood, the rotifer Brachionus sp. is ideal feed item for brackishwater finfish and mud crab larvae rearing due to its special features like rapid reproduction, slow movement, suitable size and easy digestion by the newly hatched larvae. The present study is the report on comparison of growth performance of live feed (microalgae and rotifer) in outdoor culture condition. The study was conducted at the hatchery complex of Bangladesh Fisheries Research Institute, Brackishwater Station, Paikgacha, Khulna. In outdoor culture condition the growth pattern obtained for three microalgae were Tetraselmis sp.> Nannochlorum sp.> Nannochloropsis sp. Highest average growth 6.87×106±1.97×106, 6.91×106±1.69×106 and 6.23×106±1.53×106 was observed for Nannochloropsis sp., Nannochlorum sp. and Tetraselmis sp. respectively in trial 3. Average growth of rotifer (Brachionus sp.) found highest 189±18.10 ind./ml at combined media of yeast and microalgae and lowest growth 119.67±17.60 ind./ml noticed with baker's yeast media. Nannochloropsis sp. contains more energy among all microalgae but Tetraselmis sp. carry highest level of protein. The highest level of protein 56.3±0.18% found in rotifer enriched with microalgae+fish oil and lowest protein content noticed with microalgae enrichment media. So, research finding suggests that, treatment T3 would be the best recommendations for rotifer culture.

Assessment of Insecticidal Activity of Benzylisoquinoline Alkaloids from Chilean Rhamnaceae Plants against Fruit-Fly Drosophila melanogaster and the Lepidopteran Crop Pest Cydia pomonella

The Chilean plants Discaria chacaye, Talguenea quinquenervia (Rhamnaceae), Peumus boldus (Monimiaceae), and Cryptocarya alba (Lauraceae) were evaluated against Codling moth: Cydia pomonella L. (Lepidoptera: Tortricidae) and fruit fly Drosophila melanogaster (Diptera: Drosophilidae), which is one of the most widespread and destructive primary pests of Prunus (plums, cherries, peaches, nectarines, apricots, almonds), pear, walnuts, and chestnuts, among other. Four benzylisoquinoline alkaloids (coclaurine, laurolitsine, boldine, and pukateine) were isolated from the above mentioned plant species and evaluated regarding their insecticidal activity against the codling moth and fruit fly. The results showed that these alkaloids possess acute and chronic insecticidal effects. The most relevant effect was observed at 10 µg/mL against D. melanogaster and at 50 µg/mL against C. pomonella, being the alteration of the feeding, deformations, failure in the displacement of the larvae in the feeding medium of D. melanogaster, and mortality visible effects. In addition, the docking results show that these type of alkaloids present a good interaction with octopamine and ecdysone receptor showing a possible action mechanism.

Highly efficient l-lactic acid production from xylose in cell recycle continuous fermentation using Enterococcus mundtii QU 25

We report an effective cell recycling continuous fermentation of xylose to l-lactic acid with high concentration, productivity, and yield using strain QU 25. pH was found to affect the yield and corn steep liquor as feeding medium enhanced the yield.

Examination of operational dynamics of radiant ceiling panel

Radiant ceiling panels can be used in large-volume halls, e.g. vehicle repair shops and markets, to heat the entire or specific zones of the enclosed space. The system with radiant panels may be of small water capacity when just one or several units are installed over selected zones to provide additional heating. Depending on dimensions of radiant ceiling panel, its mounting mode and the temperature of its feeding medium, various thermal conditions are created under such panel. Thermal effects are also affected by the mode of thermal or cooling power control and dynamics of such control for an individual radiant panel or a set of panels. The dynamics of attainable radiant ceiling panel capacity was investigated and used as the grounds to determine general requirements for time-domain automatic control programs and those for operation of the controllers. The results presented from the examinations carried out for water radiators are not intended to delineate the requirements for all automatic control loops for water radiators; they are aimed at attracting attention to issues to be considered when preparing the algorithm of automatic control in particular situations.