The studies were made on the surface water and groundwater sources, the existing and future water production yields of the Riga city. The forecasts about water demand in Riga by year 2010 are estimated as 200 000 m**3 dE-1, with a variation coefficient of 1.13. Total water yield is estimated as 410 000 m**3 dE-1, with a storage coefficient of 2.05, which is considered as sufficient. It is proposed that in future 50% of drinking water for Riga will be abstracted from groundwater and 50% will be produced in the Daugava surface treatment plant.

Latvia has become a fully-fledged Member State of the European Union (EU) and now is a part of the global integration processes. The EU has set a goal to form a knowledge-based society and to become a region with a dynamic economy. For this reason it is necessary to increase scientific research and innovation capacity. The scientific potential is characterized by adequate supply of materials, facilities and equipment. It is a precondition for any kind of productive scientific activity. It must be noted that equipment, along with materials and resources necessary for their maintenance and operation in scientific institutes and by groups of scientists, has not experience any significant improvement since the Soviet period. Since 1990, budgetary funding for science has been sufficient to ensure a mere survival. In 2004, Ministry of Education and Science, together with scientific institutions, drafted the National Programme "Support for Modernization of the Scientific Infrastructure in the State Research Institutions". The funding made available through the EU Structural Funds can be used for purchasing new scientific equipment for the state research institutions.

Before Latvia initiated the transition to market oriented economies, large collective units, which had the right to use the land, used most of the land but were not necessarily the landowners. This situation provided a special starting point for the return to the market economy in the agricultural sector. The government of Latvia decided to implement restitution of land ownership rights to former owners basing on historical boundaries as a method to privatise and open the land market. There were two processes going on at the same time: the restitution of private ownership rights to land, and the break-up of collective productive units. The restitution processes are the starting point for the development of land markets. Moreover, it represents a necessary condition to open land market. However, the place at which this land market opening is occurring depends on the way each government implemented the land reform.

The necessity of the research is to determine by the fact in Latvia there is a strong growth in bank credit to the private sector like in several transition countries in Central and Eastern Europe. Its implications for macroeconomic development and financial stability can be ambiguous. The aim of the research is to find possible scenarios for positive credit (to private sector) growth implications for macroeconomic development and financial stability in Latvia. Attainment of the objective comprises analysis of available statistical data about Latvia, identification of factors affecting bank credit growth following up some recent researches and modelling scenarios how the credit growth could facilitate further economic development in Latvia. This paper presents only recent trends in bank credit to the private sector in Latvia and evaluates some of the factors affecting these trends. It does not provide updated practical models and scenarios because the research has been started only recently.

The aim of the paper is to analyze relationship between international trade and the correlation of the business cycles between Baltic countries and their main trading partners. Two univariate methods are used to extract cyclical components in the time series: exponential smoothing procedure the Hodrick-Prescott filter and unobserved components method. A simple regression model proves the hypothesis that trade intensity has led to business cycle synchronization. The main conclusion is that there exists a strong correlation between the business cycles of the Baltic countries. However, the economic cycle of Baltic countries is different from that of their main trading partners in EU. According to Optimum Currency Area theory, these results cast doubts on the usefulness of adopting the euro in the Baltic countries in the near future. On the other hand, recently the deepening of economic integration has led to make intense trade between the Baltic countries and the EU, which may eventually imply more synchronised cycles in the future.

Agricultural development based on the laws of market economy enhances a change in the point of view on land as real property and search for optimal variants of its possible usage. As a large part of all agricultural land has been drained, efficient functioning of water regime regulation means is one of the essential factors determining the possibilities of land use as well as its value. Land areas where land reclamation structures are in good condition and do not needs to be repaired or reconstructed will always be of higher demand under the conditions of market economy. Present prices of agricultural land do not show the value of land reclamation systems. Therefore a complex land assessment is needed in respect of the present condition of land reclamation structures, its age and probabilities of failures.

Oats contain more beta-glucan (2-7%) than other croppers. Beta-glucan is the most essential water-soluble dietary fibre. It lowers cholesterine level in blood as well as stimulates elimination of carcinogens from the body. In order to enlarge possibilities of use of oats in a diet, they can be separated in water-soluble and insoluble fractions. The aim of the present study is to determine the amount of beta-glucan in hydrolysed oat soluble and insoluble fractions. Gelatinized, hydrolysed and steeped oatmeal prior to hydrolyse, which was separated in water-soluble and insoluble fractions, was used in experiments. Not more than 6% of gelatinized (non-hydrolysed) oatmeal dry matter dissolved in water. The outcome of fermentative hydrolysed dry matter of water-soluble oatmeal was 40-52%. The content of beta-glucan in soluble and insoluble oatmeal fraction was determined by using McClearly method. The content of beta-glucan fraction of gelatinized oatmeal decreased for 78% in comparison to the content of beta-glucan in oatmeal used in the experiments. The content of beta-glucan in the soluble fraction of hydrolysed oatmeal decreased for 8.1% to 9.2%, and increased for 35-42% in the insoluble fraction if compared with the content of beta-glucan in oatmeal.

In Latvia have not been carried out comparable studies regarding chemical pollution in organic and conventional milk, therefore the aim of the present study was to investigate the level of contamination in organic and conventional milk samples by heavy metals and aflatoxin M1. A total of 9 organic bulk milk and 9 conventional bulk milk samples were collected from different regions of Latvia. The content of lead, cadmium, copper, iron, and zinc were detected by flame technique, using atomic absorption spectrophotometer (AAS). The level of aflatoxin M, in organic and conventional milk samples was determined by high-performance liquid chromatography. The means of lead concentration in organic and conventional samples were 0.024 and 0.31 mg kgE-1 wet weight that exceed the permissible level for such a product. The cadmium content in organic and conventional milk samples is very low and fairly constant in all types of milk. The legally accepted upper limits of iron, copper and zinc are not exceeded by any analyzed milk sample, not even from conventional bulk milk. The study including heavy metals and aflatoxin M1 in a range of organic and conventional milk samples found no significant differences between organic and conventional milk (p=0.05) in the level of aflatoxin M1 and the heavy metals.

To select new sea-buckthorn hybrids and forms with increased content of biologically active substances, breeding work with sea-buckthorn hybrid seedlings is carried out in Latvia. The aim of this research was to study the vitamin C and total carotenes content in sea-buckthorn juice and its stability at different pasteurization temperatures with several durations. For study 6 sea buckthorn hybrids from 3 hybrid families were used. Vitamin C and total carotenes were determined in freshly made juice and with pasteurization at 65 deg C, 75 deg C and 85 deg C for 30, 20 and 10 minutes respectively. After processing the data obtained, it was found that vitamin C and total carotene content did not alter significantly depending on pasteurization temperature and duration. For further research 3-sea-buckthorn hybrids have been selected with the highest content of vitamin C and total carotenes.

Spices are used to season food products. Investigations were carried out to determine dynamics of primary oxidation products in flavoured rapeseed oil depending on used spice, its concetration, storage duration, and sample preparing method. The oil was flavoured with winter savoury Satureja Montana L., hyssop Hyssopus officinalis L., and marjoram Oreganum vulgare L. Results showed that dynamics of peroxide value in flavoured oils were influenced significantly (p is less than 0.05) by all investigated factors - used spice, its concentration, storage duration, sample preparing method, and interaction of these factors, too. Heating of oil in particular cases caused unusual, hard explainable dynamics of peroxide value. It is necessary to investigate optimal conditions of flavouring of oils and components of spices which can influence oxidation of flavoured oils.