A new interesting series of linear, unsaturated copolyesters containing
cyclopentanone moiety in the main chain were synthesized by interfacial
polycondensation of a mixture containing one mole of both monomeric units 2,5-bis
(4-hydroxybenzylidene) cyclopentanone (Ia) and 2,5-bis (4-hydroxy-3-
methoxybenzylidene) cyclopentanone (Ib) together with two moles of different acid
chlorides. The yield and the values of reduced viscosity of the copolyesters were
found to be affected by the kind of organic phase, contribution of
benzyltriethylammonium chloride as a catalyst, the quantitative ratio of organic to
aqueous phase, concentration of hydrogen chloride acceptor and time of addition of
the acid chloride. The resulting copolyesters were characterized by elemental and
spectral analyses. Moreover, the various characteristics of the various types of
prepared copolymers including: solubility, viscosity, X-ray diffraction analysis, DSC
and TGA were determined and discussed. The electrical properties of the copolyesters
were tested and the morphology of selected examples of the copolyesters was
examined by scanning electron microscopy.

A new interesting series of linear, unsaturated copolyesters containing
cyclopentanone moiety in the main chain were synthesized by interfacial
polycondensation of a mixture containing one mole of both monomeric units 2,5-bis
(4-hydroxybenzylidene) cyclopentanone (Ia) and 2,5-bis (4-hydroxy-3-
methoxybenzylidene) cyclopentanone (Ib) together with two moles of different acid
chlorides. The yield and the values of reduced viscosity of the copolyesters were
found to be affected by the kind of organic phase, contribution of
benzyltriethylammonium chloride as a catalyst, the quantitative ratio of organic to
aqueous phase, concentration of hydrogen chloride acceptor and time of addition of
the acid chloride. The resulting copolyesters were characterized by elemental and
spectral analyses. Moreover, the various characteristics of the various types of
prepared copolymers including: solubility, viscosity, X-ray diffraction analysis, DSC
and TGA were determined and discussed. The electrical properties of the copolyesters
were tested and the morphology of selected examples of the copolyesters was
examined by scanning electron microscopy.

A new interesting series of linear, unsaturated copolyesters containing
cyclopentanone moiety in the main chain were synthesized by interfacial
polycondensation of a mixture containing one mole of both monomeric units 2,5-bis
(4-hydroxybenzylidene) cyclopentanone (Ia) and 2,5-bis (4-hydroxy-3-
methoxybenzylidene) cyclopentanone (Ib) together with two moles of different acid
chlorides. The yield and the values of reduced viscosity of the copolyesters were
found to be affected by the kind of organic phase, contribution of
benzyltriethylammonium chloride as a catalyst, the quantitative ratio of organic to
aqueous phase, concentration of hydrogen chloride acceptor and time of addition of
the acid chloride. The resulting copolyesters were characterized by elemental and
spectral analyses. Moreover, the various characteristics of the various types of
prepared copolymers including: solubility, viscosity, X-ray diffraction analysis, DSC
and TGA were determined and discussed. The electrical properties of the copolyesters
were tested and the morphology of selected examples of the copolyesters was
examined by scanning electron microscopy.

Anewseries of poly(hydrazone–ether)swas synthesized from 3,4-dimethylthieno [2,3-b] thiophene-2,
5-dicarbohydrazide, II and 4,4-diformyl-α, ω-diphenoxyalkanes or 4,4-diformyl -2,2-dimethoxy -α,
ω-diphenoxyalkanes. The inherent viscosities of the polymers were in the range 0.22 – 0.56 dIg−1.
Majority of the polymers were soluble in concentrated H2SO4. Their thermotropic liquid crystalline
properties were examined by DSC, an optical polarizing microscopy using a hot stage and thermogravimetric
analyses. The polymers exhibited almost thermotropic liquid crystalline properties. In
most cases, the mesophases extended up to 430◦C, where thermal decomposition prevented further
observation.

Anewseries of poly(hydrazone–ether)swas synthesized from 3,4-dimethylthieno [2,3-b] thiophene-2,
5-dicarbohydrazide, II and 4,4-diformyl-α, ω-diphenoxyalkanes or 4,4-diformyl -2,2-dimethoxy -α,
ω-diphenoxyalkanes. The inherent viscosities of the polymers were in the range 0.22 – 0.56 dIg−1.
Majority of the polymers were soluble in concentrated H2SO4. Their thermotropic liquid crystalline
properties were examined by DSC, an optical polarizing microscopy using a hot stage and thermogravimetric
analyses. The polymers exhibited almost thermotropic liquid crystalline properties. In
most cases, the mesophases extended up to 430◦C, where thermal decomposition prevented further
observation.

Anewseries of poly(hydrazone–ether)swas synthesized from 3,4-dimethylthieno [2,3-b] thiophene-2,
5-dicarbohydrazide, II and 4,4-diformyl-α, ω-diphenoxyalkanes or 4,4-diformyl -2,2-dimethoxy -α,
ω-diphenoxyalkanes. The inherent viscosities of the polymers were in the range 0.22 – 0.56 dIg−1.
Majority of the polymers were soluble in concentrated H2SO4. Their thermotropic liquid crystalline
properties were examined by DSC, an optical polarizing microscopy using a hot stage and thermogravimetric
analyses. The polymers exhibited almost thermotropic liquid crystalline properties. In
most cases, the mesophases extended up to 430◦C, where thermal decomposition prevented further
observation.

Anewseries of poly(hydrazone–ether)swas synthesized from 3,4-dimethylthieno [2,3-b] thiophene-2,
5-dicarbohydrazide, II and 4,4-diformyl-α, ω-diphenoxyalkanes or 4,4-diformyl -2,2-dimethoxy -α,
ω-diphenoxyalkanes. The inherent viscosities of the polymers were in the range 0.22 – 0.56 dIg−1.
Majority of the polymers were soluble in concentrated H2SO4. Their thermotropic liquid crystalline
properties were examined by DSC, an optical polarizing microscopy using a hot stage and thermogravimetric
analyses. The polymers exhibited almost thermotropic liquid crystalline properties. In
most cases, the mesophases extended up to 430◦C, where thermal decomposition prevented further
observation.

Biological control of Fusarium salani (Mart) Sacc. and Macrophomina phaseolina (Tassi) Goid
causing wilt and charcoal rot diseases of Sesame (Sesamum indicum Linn) was studied in vitro as
well as under pot conditions. Culture technique showed that the addition of intact Nostoc sp
SAG2306 or its sonicate inhibited the radial mycelial growth of the test pathogens. Application of
Nostoc sonicates resulted in the lowest infection percentage (11.11 % and 17.78 % of Fusarium and
Macrophomina respectively) whereas in the control it was 95.55%. Under pot conditions, plant
height, fresh and dry weight of plants was found to increase significantly as a result of the inhibition
of fungal by Nostoc. Similar results were observed in chlorophyll (ch.la&ch.lb) content of the treated
plants. Infection enhanced proline accumulation that was lowered upon Nostoc addition; indicating
alleviation of infection ascribed stress.

Biological control of Fusarium salani (Mart) Sacc. and Macrophomina phaseolina (Tassi) Goid
causing wilt and charcoal rot diseases of Sesame (Sesamum indicum Linn) was studied in vitro as
well as under pot conditions. Culture technique showed that the addition of intact Nostoc sp
SAG2306 or its sonicate inhibited the radial mycelial growth of the test pathogens. Application of
Nostoc sonicates resulted in the lowest infection percentage (11.11 % and 17.78 % of Fusarium and
Macrophomina respectively) whereas in the control it was 95.55%. Under pot conditions, plant
height, fresh and dry weight of plants was found to increase significantly as a result of the inhibition
of fungal by Nostoc. Similar results were observed in chlorophyll (ch.la&ch.lb) content of the treated
plants. Infection enhanced proline accumulation that was lowered upon Nostoc addition; indicating
alleviation of infection ascribed stress.

Biological control of Fusarium salani (Mart) Sacc. and Macrophomina phaseolina (Tassi) Goid
causing wilt and charcoal rot diseases of Sesame (Sesamum indicum Linn) was studied in vitro as
well as under pot conditions. Culture technique showed that the addition of intact Nostoc sp
SAG2306 or its sonicate inhibited the radial mycelial growth of the test pathogens. Application of
Nostoc sonicates resulted in the lowest infection percentage (11.11 % and 17.78 % of Fusarium and
Macrophomina respectively) whereas in the control it was 95.55%. Under pot conditions, plant
height, fresh and dry weight of plants was found to increase significantly as a result of the inhibition
of fungal by Nostoc. Similar results were observed in chlorophyll (ch.la&ch.lb) content of the treated
plants. Infection enhanced proline accumulation that was lowered upon Nostoc addition; indicating
alleviation of infection ascribed stress.