نتایج جستجو برای: 23c
تعداد نتایج: 69 فیلتر نتایج به سال:
PURPOSE To evaluate genetic susceptibility of lysyl oxidase-like 1 (LOXL1) gene polymorphisms to exfoliation syndrome (XFS) and exfoliation glaucoma (XFG) in a case-control cohort of American and European patients. METHODS DNA from a total of 620 individuals including 287 exfoliation patients and 333 healthy control subjects were extracted by standard methods. Three single nucleotide polymorp...
Two monkeys were trained to use the thumb and forefinger to lift and hold an instrumented apparatus within a narrow position window for 1 s. The device was equipped to measure the position and the grip and lifting forces exerted by the animal. On blocks of trials the weight and surface texture could be varied or a force-pulse perturbation could be systematically delivered 750 ms after the objec...
هدف از انجام این پروژه بررسی خواص مکانیکی و حرارتی الاستومر epdm جهت رسیدن به خواص مورد نیاز در ساخت ضربه گیری مورد استفاده در بنادر جنوب کشور می باشد. برای این منظور یک فرمولاسیون پایه انتخاب گردید که انتخاب آن به تاثیرگذاری هر یک از اجزادر محصول و ماهیت و نحوه عملکرد فندرها توجه شده است . سه سری نمونه بر اساس این فرمولاسیون پایه، مطابق روش استاندارد astm آمیزه کاری و تهیه گردید. در سری اول و ...
In Dec. 1990, sweet cherry (Prunus avium L.) selections varied in floral bud kill from 9% to 92% following exposure to severe cold. In the following winter, the hardiness of two hardy and two tender selections was analyzed by differential thermal analysis (DTA) to screen selections for hardiness. In a mild winter, when buds remained at their minimum hardiness level, the hardy selections consist...
A method was devised for infecting Anthurium andraeanum Linden ex André, an economically important ornamental monocot, with Agrobacterium tumefaciens. Tumors were obtained on plant stems 7 to 10 weeks after inoculation with oncogenic A. tumefaciens strains C58 and A281 cultured previously in an induction medium containing 200 μM acetosyringone at pH 5.5. A higher percentage of tumors were forme...
The effects of seedling age and temperature regimes and durations on the reversal of Eustoma grandiflorum (Raf.) Shin. heat-induced rosette formation were clarified. When E. grandiflorum seedlings were grown in a natural-light phytotron (600-800 μmol·m·s) for 4 weeks at 33/28C (12-h day/12-h night) from germination to the four true-leaf stage, the optimum temperature and duration required to br...
This paper investigates the tribological behavior of 100Cr6 steel pin running against sintered steel bearing material used in hermetic compressors. Tests were conducted under dry and starved lubrication sliding conditions in air at room temperature. Although porous structure acts as crack initiation sites thus limiting the wear resistance of sintered iron in dry sliding conditions under high co...
INTRODUCTION Morris hepatomas Si 23C and 7800 were incubated in vitro with radioactive L-leucine in Krebs-Ringer-bicar bonate-saline, and the incorporation of radioactivity into albumin precursors, serum albumin, and tnichioroacetic acid-precipitable proteins was measured and compared to that which occurs in normal rat liver slices. At the end of a 10-mm pulse incubation with radioactive L-Ieuc...
Urupocidins A and B (1 and 2), bisguanidine alkaloids with an unprecedented skeleton system, derived from polyketide precursors and containing an unusual N-alkyl-N-hydroxyguanidine moiety, have been isolated from the sponge Monanhora pulchra. The structures of 1 and 2, including absolute configuration, were established using the detailed analysis of 1D and 2D NMR, CD, and mass spectra as well a...
The role of posttranscription regulation in preeclampsia is largely unknown. MicroRNAs (miRNAs) regulate the expression of nearly 30% of all the human genes and participate in all fundamental cell processes. Genome-wide analysis shows that human placenta expresses more than 600 miRNA species, including placenta-specific ones with high level of expression during different stage of pregnancies. m...
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