ISSN 2285-5750, ISSN CD-ROM 2285-5769, ISSN-L 2285-5750, ISSN Online: 2393 – 2260
 

Published in Scientific Papers. Series D. Animal Science, Vol. LVII
Written by Monica MARIN, D. DRĂGOTOIU, Carmen NICOLAE, Georgeta DINIȚĂ, Laura URDEȘ

The purpose of this study is the analysis of copper and iron microelements influence over the activity of intestinal amylase and maltase unfolding research on rats that the physiologically resemble swine, making it possible that the data obtained can be extrapolated. In most cases, the addition of microelements influence has manifested by inhibition of the enzymatic activity of intestinal maltase and amylase, growing with the increasing of concentration. A slight activation of intestinal amylase was observed with the administration of 600 ferric sulphate mg/kg food, maximal activation being of 104.3%.

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Published in Scientific Papers. Series D. Animal Science, Vol. LVII
Written by Nurettin GULSEN, Huzur Derya UMUCALILAR, Mustafa Selcuk ALATAS, Armagan HAYIRLI, Ozcan Baris CITIL

This experiment was conducted to determine possibility of usage of automatic system that continuously record pressure and sample gas at certain intervals in in vitro gas production technique. Rumen fluid was collected from 2 ruminally cannulated Holstein heifers weighing an average of 400 kg. Medium was prepared by mixing macromineral (200 ml), micromineral (0.1 ml), buffer (200 ml), reduction (40 ml) and resazurin (1 ml) solutions as well as distilled water (400 ml). The mixtures contained alfalfa hay, maize silage, wheat, maize, cottonseed meal, and soybean meal. Mixtures differing in the roughage:concentrate ratio (20:80, 40:60, 60:40, and 80:20) were formulated to contain rapidly fermentable fraction (B1+B2), insoluble but slowly fermentable fraction (B3,) and 50% of these fractions at three different fermentation characteristics. Gas productions at 6, 12, 24, and 48 h relative to incubation determined using system recording continuously. In automatic system, "dual-pool logistic equation" representing factions either soluble in NDF solution and rapidly fermentable fraction (NDF-F) and fractions or insoluble in NDF solution, but slowly fermentable (NDF-S) were used. The fermentation was completed within 12 h in fully automatic system. While cumulative gas production from NDF-F was positively correlated with gas production within 3 h (r=0.77, P<0.001), cumulative gas production from NDF-S was positively correlated with gas production within 3-20 h (r=0.88, P<0.001). Differences in time to reach maximal fermentation rate from NDF-F and NDF-S increased with increasing NDF (r=0.76, P<0.001) and ADF (r=0.85, P<0.001) levels. These data suggest that fermentation kinetics parameters, such as lag time and time to reach maximal fermentation rate from fractions soluble and insoluble in NDF solution, should be considered in formulation and evaluation of rations.

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Published in Scientific Papers. Series D. Animal Science, Vol. LVII
Written by Nicolae EREMIA, Andrei ZAGAREANU, Susana MODVALA

For vital processes bee family needs a considerable amount of food - honey and bee bread. In cases when the family food supply is insufficient, the bees must be fed additionally. The purpose of research is to determine the influence of the use of feed additives in bees feeding in queens growth. There was found that the optimum dose of the feed additive Premix Bionorm P (Symbiotic complex) used to feed bee queen is 150 mg/l of sugar syrup. Feeding is performed daily in the calculation of mixing 1 l per a bee family beginning with the introduction of the frame with transferred larvae till the queen-cell capping for 5 days. It was found that the use of the feed additive (symbiotic complex) in the diet ensures larvae adoption in growth of bee queens with 15,3-25,7%, compared with the control groups I and II, the queen-cell mass increased with 60,0-110,0 mg or with 5,7-11%, the length – 0,1-0,2 cm or with 3,7-7,8% , the diameter – 0,03 cm or with 2,5%, the body weight of unmated queens - with 1,94-6,62 mg or with 1,1-3,8% and mated queens with 20,86- 26,19 mg or with 9,1-11,7% .

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Published in Scientific Papers. Series D. Animal Science, Vol. LVII
Written by H. A. ABD EL-AAL

Ground buffalo meat was preblended with either 0.3% potassium sorbate, 0.05% sodium ascorbate, and 0.3% potassium sorbate. 0.05% sodium ascorbate stored in refrigerator at 4ºC ±1ºC. Color (L, a, b), pH value, water holding capacity (WHC), cooking loss 2-Thiobarbituric acid (TBA) number, and total volatile bases, (TVB) were determined. Aerobic plate counts (APC), anaerobic bacterial count, psychrophilic bacterial count, total coliform and sensory properties were also determined. The results revealed that ground buffalo meat treated with 0.3% potassium sorbate and 0.05% sodium ascorbate had the highest Hunter "a" value (redness). pH values, TBA number, and TVB increased along with storage period. Ground buffalo treated with potassium sorbate alone or potassium sorbate mixed with sodium ascorbate had lower anaerobic and psychrophilic bacterial counts than samples treated with sodium ascorbate alone and still accepted for panelist after 10 days of refrigerated storage.

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© 2019 SCIENTIFIC PAPERS. SERIES D. ANIMAL SCIENCE. To be cited: SCIENTIFIC PAPERS. SERIES D. ANIMAL SCIENCE.

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