منابع مشابه
Rock-Menkin Experiments
Dr. John Rock, a doctor of obstetrics and gynecology in Boston, and Miriam Menkin [4], Rock?s hired lab technician, were the first researchers to fertilize a human egg [5] outside of a human body in February of 1944. Their work was published on 4 August 1944 in an issue of Science in an article entitled ?In Vitro Fertilization and Cleavage of Human Ovarian Eggs.? This experiment marked the firs...
متن کاملSynthetic Rock Analogue for Permeability Studies of Rock Salt with Mudstone
Knowledge about the permeability of surrounding rock (salt rock and mudstone interlayer) is an important topic, which acts as a key parameter to characterize the tightness of gas storage. The goal of experiments that test the permeability of gas storage facilities in rock salt is to develop a synthetic analogue to use as a permeability model. To address the permeability of a mudstone/salt layer...
متن کاملSpinel–rock salt transformation in LiCoMnO4−δ
The transformation on heating LiCoMnO4, with a spinel structure, to LiCoMnO3, with a cation-disordered rock salt structure, accompanied by loss of 25% of the oxygen, has been followed using a combination of diffraction, microscopy and spectroscopy techniques. The transformation does not proceed by a topotactic mechanism, even though the spinel and rock salt phases have a similar, cubic close-pa...
متن کاملThe Triple Salt Sr14[Ta4N13][TaN4]O-A Nitridotantalate Oxide with 19-fold Rock Salt Superstructure.
A new structure motif in nitridometalate chemistry is the tetracatena-nitridotantalate anion [Ta4N13]19-. It occurs in the crystal structure of the triple salt Sr14[Ta4N13][TaN4]O (monoclinic, space group P21/c with a = 15.062(2) Å, b = 7.2484(6) Å, c = 24.266(3) Å, and β = 97.280(10)o) together with ortho-tantalate and isolated oxide anions. Synthesis followed a new approach with employment of...
متن کاملRock/water interaction in dielectric properties: Experiments with hydrophobic sandstones
The dielectric constant of a partially saturated sandstone varies as a function of the level of water saturation. Experimental data indicate that rock/water interaction, at low saturations, has a large effect on the measured dielectric response. To theoretically predict the dielectric constant of the rock/water/air system, this rock/water interaction must be accounted for by including the effec...
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ژورنال
عنوان ژورنال: Soil Science
سال: 1921
ISSN: 0038-075X
DOI: 10.1097/00010694-192112000-00004