Twelve hundred vessels found at Oboda (Avdat) in the Nabatean potter's workshop, in the fill of the podium of the Nabatean temple, in the ruins of a partly excavated Nabatean dwelling, in the large city dump, and in various other loci constitute the most complete corpus of pottery found on a Nabatean site and reveal the splendor of the Nabatean culture of the 1st century CE. Apart from the numerous imported vessels from all over the Roman empire, Oboda was an important production center of local pottery, which included the fine eggshell ware, sigillata, and innumerable types of plain ware. Most of the pottery pertains to the Middle Nabatean period (30 BCE*50-70 CE), when Oboda held a key position in the Nabatean caravan network. The meager finds of the early period, all imported from centers in the eastern Mediterranean, are in keeping with a site in transition between semi-nomadism and semi-sedentarization. An attempt has been made to classify the pottery not only by type but also by function.
The idea of renewing excavations at Beth Shean was conceived by Yigael Yadin in the context of his desire to gain a broader understanding of the Early Iron Age. After dealing with questions concerning this period during his excavations and studies of Hazor and Megiddo, he was convinced that in order to reexamine this period two further regions should be examined * the inland valleys and the coastal area. Beth Shean was chosen by him as the key site for the former region. The present volume presents the main results of this season of excavations, with detailed discussions of the pottery assemblages. The Early Iron Age was previously identified in three strata at the site; the renewed excavations resulted in the identification of an additional stratum of this period. A fresh reconstruction of the historical events and setting of the Early Iron Age in this part of the country may now be attempted.
An easy and new method for the quant. evaluation of creaming for oil-in-water emulsions used absorption measurements of a dye dissolved in the oil phase prior to the emulsion prepn. The measurements were carried out by dissolving samples, withdrawn at different intervals from the bottom of the stored emulsions, in Me2CO, to obtain clear colored solns. The technique was suitable to predict the tendency of an emulsion to undergo creaming. The proposed method has been compared to known methods for droplet size evaluation, and a good correlation was obtained. [on SciFinder(R)]
S.A. Lamprecht, Schwartz, B. , Krugliak, P. , Odes, H.S. , Guberman, R. , ו Krawiec, J.. 1986.
“Role Of Cyclic Gmp In Gastrin Secretion From Rat Antral Mucosae In Organ Culture”. J Cyclic Nucleotide Protein Phosphor Res, 11, 3, Pp. 177-89. .
Publisher's Version תקציר Rat antral mucosae maintained for 6 h in organ culture responded to carbamylcholine with a significant increase in endogenous cyclic GMP production and gastrin secretion. The acetylcholine analogue exerted a stimulatory action within a defined concentration range: exposure of antral explants to carbachol concentrations greater than the optimal stimulatory dose was accompanied by a marked decrease in both cyclic GMP production and gastrin release. Exogenous 8-Br-cyclic GMP (1 mM) significantly augmented gastrin secretion into the culture media during 6-12 h culture periods. Cycloheximide (0.1 mM) and the Ca2+ channel-blocker verapamil (5 microM) prevented 8-Br-cyclic GMP from acting as a gastrin secretagogue. Addition of cyclic somatostatin-14 (0.1 mM) to culture media was attended by complete inhibition of 8-Br-cyclic GMP-stimulable gastrin secretion. These results provide evidence that cyclic GMP may play a mediatory role in the coupling of gastrin secretory processes to agonist stimulation. It would seem that the secretagogue action of 8-Br-cyclic GMP requires unabated Ca2+ transmembrane fluxes and protein biosynthesis. Since somatostatin-14 abrogates the stimulatory effect of 8-Br-cyclic GMP on antral gastrin secretion, it is surmised that the inhibitory tetradecapeptide acts at a locus (or loci) distal to domains involved in the actual generation of the cyclic nucleotide.
M Hochstrasser, Mathog, D, Gruenbaum, Y, Saumweber, H, ו Sedat, JW. 1986.
“Spatial Organization Of Chromosomes In The Salivary Gland Nuclei Of Drosophila Melanogaster.”. J Cell Biol, 102, 1, Pp. 112-23.
תקציר Using a computer-based system for model building and analysis, three-dimensional models of 24 Drosophila melanogaster salivary gland nuclei have been constructed from optically or physically sectioned glands, allowing several generalizations about chromosome folding and packaging in these nuclei. First and most surprising, the prominent coiling of the chromosomes is strongly chiral, with right-handed gyres predominating. Second, high frequency appositions between certain loci and the nuclear envelope appear almost exclusively at positions of intercalary heterochromatin; in addition, the chromocenter is always apposed to the envelope. Third, chromosomes are invariably separated into mutually exclusive spatial domains while usually extending across the nucleus in a polarized (Rabl) orientation. Fourth, the arms of each autosome are almost always juxtaposed, but no other relative arm positions are strongly favored. Finally, despite these nonrandom structural features, each chromosome is found to fold into a wide variety of different configurations. In addition, a set of nuclei has been analyzed in which the normally aggregrated centromeric regions of the chromosomes are located far apart from one another. These nuclei have the same architectural motifs seen in normal nuclei. This implies that such characteristics as separate chromosome domains and specific chromosome-nuclear envelope contacts are largely independent of the relative placement of the different chromosomes within the nucleus.
