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., Appa Rao, S., Mengesha, M. H., Ellis, R. H. 1991: Longevity of pearl millet ( Pennisetum glaucum R. Br.) seeds harvested at different stages of maturity. Annals of Applied Biology , 119 , 97-1103. Longevity of pearl millet

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The relationship between the content of bioactive compounds and mutagenic activity of elderberry fruit at different stages of ripeness was investigated. Significant differences in the antioxidant profiles (TLC, HPLC with post-column derivatization) and antioxidant activity (ABTS, DPPH, and FC tests) were observed for studied elderberry extracts. The more ripen the fruit at the time of harvest were, the higher the content of anthocyanins (increase from 0 to 7.8 mg g−1d.w.) and antioxidant activity of the extracts (about 5-fold increase) were. Cyanogenic glycosides were not detected at any stage of ripeness. Accordingly, Ames MPF test (Xenometrix) did not reveal any mutagenicity. Our study suggests that instability of cyanogenic glycosides ensures safety of food/pharmaceutical products based on even not fully ripen elderberry fruit.

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Erigeron canadensis is an annual plant of the Asteraceae family, widely distributed in rural and urban areas of Poland and other European countries, which has been reported to be resistant to almost all kinds of herbicide. It has been used in folk medicine to treat diarrhea and as a hemostatic agent, and also has anti-inflammatory, diuretic, and antiseptic activity. The plant is reported to contain tannins, flavonoids, phenolic acids, and sphingolipids; its essential oil is rich in limonene and β-ocimene. A simple densitometric TLC method has been established for analysis of monogalactosyldiacylglycerol (MGDG) and digalactosyldiacylglycerol (DGDG) in extracts of fresh samples of Erigeron canadensis collected at different stages of growth. Silica gel 60 was used as stationary phase and chloroform-methanol-10% acetic acid 16:4:0.4 (ν/ν) as mobile phase. Detection and quantification were performed densitometrically at 477 nm, after derivatization by spraying with a 25% solution of sulfuric acid in methanol and heating at 105°C for 5 min. The method was validated for specificity, linearity, precision, recovery, and limits of detection and quantification.

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Abstract  

Flow birefringence (FB) has been investigated in solutions of products of hydrolytic degradation of poly(naphthoyleneimide benzimidazole) (PNIB) in 96% sulphuric acid PNIB solutions have previously been subjected to heating at various temperatures from 65 to 120°C and then investigated at 22°C by FB and viscometry. A monotonic decrease in intrinsic viscosity and the molecular weightM of thermal degradation products with increasing degradation temperature was detected. At the same time, the shear optical coefficients in series of products with decreasingM first increases and then, at treatment temperatures exceeding 90°C, decreases with decreasing [ν] in accordance with decreasingM of the product. Possible reasons for the detected anomaly have been discussed.

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Abstract  

The Radiochemistry Department of Rotem Industries produces 131I hard gelatin capsules for the treatment and diagnosis of different thyroid disorders. Each capsule is designated for a specified patient according to the physician's decision that is based on the patient's morbid status. GMP (Good Manufacturing Practices) requirements have been implemented throughout the production process resulting in the accreditation by the Israeli Ministry of Health. A computerized system has been developed and is used as a QC tool throughout the process of 131I capsule production. The request by the physician for capsules of various activities are introduced into the system and the process from production through packaging and external radiation monitoring is computer-controlled. The system prevents the possibility of double orders, out of specification production and enables documentation of data regardless of production date.

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Acta Veterinaria Hungarica
Authors: Katarzyna Knapczyk, Malgorzata Duda, Bozena Szafranska, Katarzyna Wolsza, Grzegorz Panasiewicz, Marek Koziorowski, and Maria Slomczynska

The sites of oestrogen action can be shown by the localisation of their receptors in the target tissues. The aim of the present study was to show the localisation of oestrogen receptors in porcine embryos and fetuses obtained on days 18, 22, 32, 40, 50, 60, 71 and 90 post coitum (p.c.). The visualisation of proteins was conducted in embryos and various fetal organs such as gonads, uterus, lung, kidney, intestine and adrenal gland. Both ERs were observed in the blastocysts on day 18 p.c. In the male, ERβ was detected in the testis and epididymis, whereas ERα was present in the efferent ductules. In the female, ERβ was detected in the ovarian stromal cells investing the oocyte nests, while ERα protein was detected in the surface epithelium. In the uterus, ERs were present in the stromal cells, while ERβ was present in the luminal epithelium. In the non-reproductive fetal porcine tissues ERβ was localised in the lungs, kidneys, adrenal glands and in the umbilical cords. Both ERs were observed in the intestine. It is possible that ERβ may play important roles in the development of the adrenal gland, testis, kidney and lungs, while both ERs are involved in the development of the ovary, uterus, epididymis and intestine of the porcine fetus.

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Abstract  

A method has been developed for the determination of Re, Se, As, Sb, Pt, Au, Te and Rare Earth elements in samples collected at various stages during the production of copper. Instrumental neutron activation analysis, along with a multielement sequential procedure for radiochemical separation of these analytes has been worked out and the results for various samples are discussed.

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clear pathological abnormality in the tissue elements building up the hyaline cartilage, which is responsible for the different stages of the disease. Besides examining healthy cartilage with differential scanning calorimetry the authors planned to carry

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Journal of Thermal Analysis and Calorimetry
Authors: Hichem Eloussifi, Jordi Farjas, Pere Roura, Jaume Camps, Mohamed Dammak, Susagna Ricart, Teresa Puig, and Xavier Obradors

of the transformation is independent of the oxygen and H 2 O partial pressures. The precursor decomposition takes places in five different stages: (i) dehydration, (ii) formation of yttrium fluoride as a stable intermediate, (iii) decomposition of YF

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Journal of Thermal Analysis and Calorimetry
Authors: Hou-yin Zhao, Yan Cao, Song P. Sit, Quentin Lineberry, and Wei-ping Pan

Relationship between pre-exponential factor k 0 and activation energy E Pyrolysis-GC/MS analysis Figure 9 shows an overlay of the total ion chromatograms for the different

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