Archive for Mart 17th, 2009

Mar

17

Investigation of sodium and potassium ions in relation to bioflocculation of mixed culture microorganisms

By admin

Bioflocculation happens naturally and microorganisms aggregate into flocs during wastewater
treatment. It is critical to understand the mechanisms of bioflocculation and its impact on the
following solid/liquid separation process since seperation by settling is one of the key aspects
that determine the efficiency and the overall economy of activated sludge systems.
Bioflocculation occurs via extracellular polymeric substances (EPS) and [...]

Mar

17

Investigation of sugar metabolism in Rhizopus oryzae

By admin

Rhizopus oryzae is a filamentous fungus, which can produce high amounts of
L(+) lactic acid and produces ethanol as the main by-product. In an effort to
understand the pyruvate branch point of this organism, fermentations under different
inoculum and glucose concentrations were carried out.
At low inoculum size (1×103 spores/ml), high amount of lactate (78 g/l) was
produced, whereas high [...]

Mar

17

Complementation studies to identify genes with roles in zinc efficiency in barley

By admin

Zinc (Zn) is an essential micronutrient for the growth and development of all
organisms. Zinc deficiency is a widespread micronutrient disorder worldwide, which
reduces crop yields and the nutritive value of the grain. Understanding the process of
zinc absorption and translocation in crop is essential for this purpose. Zinc is taken up
by plants and translocated within plants through [...]

Mar

17

Sequential growth factor delivery from complexed microspheres for bone tissue engineering

By admin

Complexed microspheres of poly(4-vinyl pyridine) (P4VN) and alginic acid were prepared by internal gelation method and subsequent freeze drying.
The 4% and 10% microspheres were loaded with Bone Morphogenetic Protein-2 (BMP-2) and Bone Morphogenetic Protein-7 (BMP-7), respectively for in vitro studies and were entrapped in PLGA foams. Foams containing only 4%, BMP-2 microspheres, only 10%, BMP-7 [...]

Mar

17

Effect of cold stress on barley (Hordeum vulgare L.) superoxide dismutase isozyme activities and expression levels of Cu/ZnSOD gene

By admin

In this study, effect of cold stress and recovery on the superoxide dismutase (SOD)
activities and the expression levels of Cu/ZnSOD gene were investigated in two
barley cultivars (Tarm-92-winter type, Zafer-160-spring type). Eight days old barley
seedlings were subjected to two different cold stresses; chilling stress at 4°C for 1, 3,
7 days and freezing stress at -3°C and [...]

Mar

17

Screening of genetic modification in tomato seeds and identification of genetically modified ripening delayed tomato seeds

By admin

Tomato has been genetically modified for providing properties such as insectresistance
or delayed-ripening. Tomato seeds purchased from several bazaars and
markets were screened for the presence of genetic modification by targeting NptII
kanamycin resistance, Nos terminator, and 35S promoter gene regions which are the
most commonly transformed gene regions in transgenic plants, and then ripeningdelayed
tomato seeds were tried to [...]

Mar

17

Legionella monitoring of various water system by a PCR based kit, Aquascreen

By admin

Industrialisation brings new problems like emerging infectious diseases; one of them is Legionnaire’s Disease. Legionella is a common pathogenic colonizer of water distribution systems and cooling towers leading to severe health risks and considerable legal and/or economic damage to businesses where spreading of it is easier and to more people working and living nearby.
Environmental [...]

Mar

17

Tiroit kanserli ve tiroit bozukluğu olan hastalarda ras onkogen mutasyonlarinin yuvalanmiş polimeraz zincir reaksiyonu ve restriksiyon enzim kesimi ile araştirilmasi

By admin

With the discovery of oncogenes two decades ago, a dramatic change took place in cancer research, and the direction of cancer research switched from carcinogens and mutagens to oncogenes and tumor suppressing genes. As a result of both oncogene activation and tumor suppressing gene activation deviations take place in cell circle and tumor may develop. [...]

Mar

17

Recognition of dysmorphic syndromes using image analysis

By admin

The lexial meaning of the dysmorphic is defined as the congenital malformation of
human. At the present time, the most common syndrome of the dysmorphic
autosomal chromosome diseases is Trisomy 21, in other words down syndrome.
Therefore, clinic pre-diagnosis of down syndrome carries severity. Clinic prediagnosis
can be estimated by either comparison of the images on reference books
or experience [...]

Mar

17

Investigation of interaction with soil microflora of ectomycorrhizal Tricholoma caligatum population in Muğla province and its vicinity

By admin

T.caligatum which has ectomycorrhizal life with pine and cedrus trees distributed from Muğla and Antalya provinces’s forests in our country. Twenty four different soil samples and 15 different potential T.caligatum fructifications were collected from these region. Both physical and chemical characteristics and also microbial load of the soils were determined. The fungal counts in Rose-Bengal [...]