نتایج جستجو برای: ice
تعداد نتایج: 53535 فیلتر نتایج به سال:
Comparison of ice discharge from higher elevation areas of the entire Greenland Ice Sheet with total snow accumulation gives estimates of ice thickening rates over the past few decades. On average, the region has been in balance, but with thickening of 21 centimeters per year in the southwest and thinning of 30 centimeters per year in the southeast. The north of the ice sheet shows less variabi...
The Eemian (last interglacial, 130-115 ka) was likely the warmest of all interglacials of the last 800 ka, with summer Arctic temperatures 3-5 °C above present. Here, we present improved Eemian climate records from central Greenland, reconstructed from the base of the Greenland Ice Sheet Project 2 (GISP2) ice core. Our record comes from clean, stratigraphically disturbed, and isotopically warm ...
Accumulations of sediment beneath the Antarctic Ice Sheet contain a range of physical and chemical proxies with the potential to document changes in ice sheet history and to identify and characterize life in subglacial settings. Retrieving subglacial sediments and sediment cores presents several unique challenges to existing technologies. This paper briefly reviews the history of sediment sampl...
To mutate the Ice Nucleation Active (INA) gene in Erwinia herbicola strains, Tn-5 transposon carried by Psup2021 plasmid was used. This plasmid was transferred to the bacterial cells by electroporation. Electrotransformation was carried out for 2.5 ms at 1800 v and 1 mm distance between the electrodes. Polymerase chain reaction was used for determination of presence or loss of INA gene, using a...
Traditional ice-cream is a type of ice-cream whose all processes of production and distribution are done by hand. The present study aimed at assessing the prevalence of bacterial contamination of traditional ice creams and its decisive factors. The current study was a descriptive cross-sectional one in Birjand in 2015. The samples were transferred under sterile conditions and cold chain, to ...
Background and Aim: Nausea and vomiting are the most common side effects of chemotherapy. The aim of the current study was to assess the effect of ice massage applied to the pericardium 6 (P6 or Neigaun) acupuncture point on nausea– vomiting due to chemotherapy in cancer patient. Materials and Methods: In a randomized clinical trial one- blind, 114 patients were randomly divided into three grou...
polar sea ice concentration (SIC) playing important roles in the global climatic and environmental studies. To evaluate the passive microwave SIC we observed sea ice with the 6 m-resolution, Electro-Optical Camera (EOC) sensor onboard KOMPSAT-1 satellite. A total of 72 cloud-free EOC images, 18 km x 18 km each, of arctic sea ice edges were obtained from July to August and 68 images across the a...
Numerical models including one or more faults in a rheologically stratified lithosphere show that climate-induced variations in ice and water volumes on Earth's surface considerably affect the slip evolution of both thrust and normal faults. In general, the slip rate and hence the seismicity of a fault decreases during loading and increases during unloading. Here, we present several case studie...
Several decades of ice-penetrating radar surveys of the Greenland and Antarctic ice sheets have observed numerous widespread internal reflections. Analysis of this radiostratigraphy has produced valuable insights into ice sheet dynamics and motivates additional mapping of these reflections. Here we present a comprehensive deep radiostratigraphy of the Greenland Ice Sheet from airborne deep ice-...
in this research, stevia and inulin was used as sugar and fat replacer in dietetic ice cream formulation, respectively. ice cream formulation with stevia (0-100%) and inulin (0-85%) was optimizedusing response surface methodology.dependent variables included specific gravity (sg), viscosity, overrun, first drop and melting. the results showed that sg had converse relation with replacing stevia ...
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