209 CONTENTS

Buletinul AŞM. Ştiinţele vieţii. Nr. 2 (314) 2011
Abstracts
This article reports the results of an investigation performed to assess the in uence of the
temperature, medium pH, and cultivation duration on the multiplication of the Saccharomyces
cerevisiae CNMN-Y-20 and Saccharomyces cerevisiae CNMN-Y-21 yeast strains and
carbohydrate biosynthesis. It has been found that the optimal temperature for the multiplication
of the above yeast strains is +15°С, and the maximal carbohydrate content in the biomass is
accumulated in a stationary phase of growth, when the duration of cultivation is 120 hours. It
has been established that the optimal medium pH for carbohydrate biosynthesis is 5.5.
16 references, 9 gures
UDC: 504.53.052/.062.4
THE INFLUENCE OF DIFFERENT TECHNOLOGIES OF SUGAR BEET
CULTIVATION ON THE MICROBIAL ACTIVITY IN SOIL. Corcimaru S., Mereniuc
Gh., Boincean B., Bugaciuc M. // Buletinul Academiei de Ştiinţe a Moldovei. Ştiinţele vieţii.
2011. No 2 (314), p.166-170.
Sugar beet was found to have a negative in uence on the general soil microbial activity and,
as a result, on the soil organic matter content when grown continuously without fertilizers. This
negative in uence was signi cantly stronger than the one of continuous alfalfa, signi cantly
lower than the one of continuous corn, and comparable to the ones of continuous winter wheat
and sun ower. The negative effects of continuous sugar beet on the soil microbial activity
could be only partially removed by adding organic and mineral fertilizers. Inclusion of sugar
beet into the ecological crop rotation with organic fertilizers caused neither inhibition of the soil
microbial activity nor decreases in the soil organic matter content.
5 references,1 table.
UDC: 637.146.32:612.398.192.
AMINO ACID COMPOSITION AND NUTRITIONAL VALUE OF COMBINED
SOUR CREAM PRODUCED BY USING LOCAL STRAINS OF LACTIC ACID
BACTERIA. Shvets Svetiana, Burtseva Svetlana, Garaeva Svetlana, Burets Elena,
Coev Ghenadie. // Buletinul Academiei de Ştiinţe a Moldovei. Ştiinţele vieţii. 2011.
No 2 (314), p.170-177.
Amino acid composition has been studied in a sour cream combination produced from
a mix of cow and soy milk by using a combination of the local strains of lactic acid bacteria
(IBC). It has been found that the samples of the sour cream combined at a ratio of 70%:30%
and 50%:50%, prepared in the laboratory conditions using a thermostatic method, qualitatively
cover the daily needs in all essential amino acids based on the total content of essential amino
acids; while the characteristics of the protein nutritive value (the indices E/N and E/T) are close
to those of casein. The sour cream produced from a mix of cow and soy milk (70%:30%) is more
rich in essential, immunoactive, glycogenic, and sulfur-containing amino acids, which allows it
to be recommended for production.
19 references, 3 tables, 1 gure
UDC 504.06; 504.4.054
THE IMPACT OF SURFACE ACTIVE SUBSTANCES ON THE BIO-CHEMICAL
PROCESS OF AMMONIUM ION OXIDATION IN NATURAL WATERS. Spataru Petru,
Sandu Maria, Tarita Anatol, Lupascu Tudor, Negru Maria, Mosanu Elena, Turcan Sergiu. //
Buletinul Academiei de Ştiinţe a Moldovei. Ştiinţele vieţii. 2011. No 2 (314), p.178-184.
Ammonium compounds can be found in natural waters as a result of contamination with
wastewaters or drainage water from agricultural areas where nitrogen fertilizers are used.
Studies show that surface active substances (SAS) are present in river waters since conventional
biological treatment methods are less effective for their puri cation. The SAS are toxic to
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