2020, Volume 14, Issue 1 (Volume 14, Issue 1, January-July 2020)

(In Progress)

Potential of complete feed formulated from local raw materials on beef cattle performance
Syamsuddin Hasan, A. Mujnisa, Purnama Isti Khaerani, Sema, Asmuddin Natsir

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Abstract

The study aimed to identify potential of complete feed formulated from local raw materials on and beef cattle performance. This study employed Completely Randomized Design (CRD) consisted of 4 treatments and 3 replications. The treatments consisted of T0= amofer-corn straw ad libitum (9.0% CP and 60.0% TDN); T1= Complete feed (10.0% CP and 55.0% TDN); T2= Complete feed (11.0 CP and 60.0% TDN); T3= Complete feed (12.0% CP and 65.0% TDN. The results showed that the treatment of amofer-corn straw significantly affected (P<0.01) chemical component i.e. crude protein, NDF, ADF, cellulose, and hemicellulose of complete feed. The treatment of amofer-corn straw significantly affected (P<0.05) feed consumption and Body Weight Gain (BWG). In conclusion, Treatment T3 containing 12.0% of CP and 65.0% of TDN is more effective to improve beef cattle performance.

Keywords: complete feed, fattening, in vitro, local raw materials

Citation: Hasan S, Mujnisa A, Khaerani PI, Sema, Natsir A. Potential of complete feed formulated from local raw materials on beef cattle performance. Eurasia J Biosci. 2020;14(1):1-6.

Influence of constricts on the body of a medical leech on their reproductive ability
Ruslan Aminov, Alexander Frolov, Alina Aminova

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Abstract

In the experiment, 120 medical leeches of three species were used: H. verbana, H. medicinalis, H. orientalis. In which constrictions (defect) on their body and reproductive belts were revealed. Those leeches, which had constricts, right up to the rupture of its tissues in these places, were planted two or three in liter jars for reproduction. Their readiness for reproduction was checked by fecundity belts. Piece conditions were created by examples of their living in the wild. We found that this defect (constrictions) contribute to their poor laying of cocoons, up to their absence. Also, most leeches died without laying cocoons in the second week of jigging. The resulting cocoons were defective. our results prove that the appearance of constrictions in a medical leech significantly affects their reproductive. These constrictions appear in about 5% of leeches fed by human and animal blood.

Keywords: medical leeches, reproductive, ectoparasite, constrictions, hematophagus, cocoons

Citation: Aminov R, Frolov A, Aminova A. Influence of constricts on the body of a medical leech on their reproductive ability. Eurasia J Biosci. 2020;14(1):7-10.

Screening for some marine cyanobacteria isolated from Red Sea Coast, Egypt producing antimicrobial activity
Reham G. Elkomy

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Abstract

Marine microalge are known as source of bioactive secondary metabolites. In the present work, production of antimicrobial activity by three marine cyanobacteria Oscillatoria simplicissima, Oscillatoria acutissima and Spirulina platensis and antimicrobial activities of them was investigated against different microorganisms. The effects of pH, temperature and light intensity on the production of antimicrobial activity were tested. Extracts of the algae were prepared using hexane, chloroform, ethanol, methanol and water, then assayed for antimicrobial agents against microorganisms like Staphylococcus aureus, Micrococus luteus, Serratia marcescens, Salmonella spp., Vibrio spp., Aeromonas hydrophila, Pseudomonas aeruginosa, Escherichia coli and one species of yeast Candida albicans. Data showed that the methanol extract was very effective against bacterial and fungi strains compared to other extract at pH 8.0, 30ºC and 3000 lux for three algal. No antimicrobial activity was detected in the water extracts. This material was produced, maximally, after 12, 14, 12 days of incubation period in aerated culture for Oscillatoria simplicissima, Oscillatoria acutissima and Spirulina platensis respectively. The results indicated scope for utilizing these microalgae as a source of antimicrobial substances.

Keywords: Antimicrobial activity, marine microalgae, cyanobacteria, Red Sea, optimization

Citation: Elkomy RG. Screening for some marine cyanobacteria isolated from Red Sea Coast, Egypt producing antimicrobial activity. Eurasia J Biosci. 2020;14(1):11-9.

Antioxidant activity of nutmeg fruit flesh-derived essential oil obtained through multiple drying methods
Sophia Grace Sipahelut, Ariance Yeane Kastanja, Zeth Patty

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Abstract

The purpose of this research is to study the influence of drying methods on the antioxidant activity and peroxide value of nutmeg fruit flesh-derived essential oil. This research employs a Completely Randomized Design (RAL) with 3 repetitions and nutmeg fruit flesh drying treatment (fresh/ without drying, shade-drying, sun-drying). The parameters observed include antioxidant activity test and peroxide value of nutmeg fruit flesh-derived essential oil. The research results show that nutmeg fruit flesh-derived oil contains 32 components, with major components consisting of α-pinene (18.0%), myristicin (14.1%), α-terpineol (9.4%), β-pinene (8.9%), limonene (8.5%), terpinene-4-ol (8.4%), δ-terpinene (5.9%), α-terpinolene (5.2%), and α-terpinene (4.3%). The highest antioxidant activity of nutmeg fruit flesh-derived oil is found in the shade-drying treatment, which may serve as a reducing agent in oxidation process and has good activity as an anti-free radical of DPPH. The peroxide value is lower than that of α-tocopherol, showing that nutmeg fruit flesh-derived oil has the capability to inhibit oxidation process better than α-tocopherol.

Keywords: nutmeg fruit flesh-derived oil, antioxidant activity, peroxide value

Citation: Sipahelut SG, Kastanja AY, Patty Z. Antioxidant activity of nutmeg fruit flesh-derived essential oil obtained through multiple drying methods. Eurasia J Biosci. 2020;14(1):21-6.

Use of bioactive chitosan and Lippia multiflora essential oil as coatings for maize and sorghum seeds protection
Cissé Mohamed, N’guessan Elise Amoin, Tia Vama Etienne, Kouakou N’guessan Yannick

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Abstract

Essential oil (EO) extracted from leaves of Lippia multiflora were used alone or combined with chitosan at 0.25% and 0.5% as coating solutions for maize and sorghum seeds. Different coating formulations made were tested on seeds to determine their antifungal activity against Rhizopus sp and A. Flavus respectively isolated from sorghum and maize seeds. Coating solutions impact on seeds germination rate and plant growth in the laboratory condition were also evaluated. Results revealed that chitosan and L. Multiflora EO coating used separately exhibited fungicidal effect against Rhizopus sp and fungistatic effect against A. Flavus. When there were associated, the coating formulation demonstrated a strong inhibition against A. flavus and became ineffective against Rhizopus ssp. Chitosan solution (0.25% and 0.5%) without EO significantly increased seeds germination percentage and height maize and sorghum plant. On the other hand, EO coating alone displayed a total inhibition of seeds germination. When EO was mixed with chitosan solution, a decrease in the height of plants was observed.

Keywords: Chitosan, Lippia multiflora, coating, antifungal, germination

Citation: Mohamed C, Amoin NE, Etienne TV, Yannick KN. Use of bioactive chitosan and Lippia multiflora essential oil as coatings for maize and sorghum seeds protection. Eurasia J Biosci. 2020;14(1):27-34.