منابع مشابه
Outstanding bile pigment problems.
In this review of the chemistry, biochemistry and chemical pathology of the bile pigments I am well aware that I shall ask many more questions than I am able to answer. It seems appropriate that the subject should be considered under the five headings: -Chemistry; Formation from Haem Proteins; Transport in the Blood; Conjugation and Transport to the Bile; and Changes in the Gut. I shall conclud...
متن کاملOutstanding Problems concerning the Global Electric Circuit
We revisit the problems related to the discrepancy between the observed amplitudes, of responses of the global circuit to inputs related to solar activity, as compared to modeled amplitudes. The solar activity modulates the latitude distribution of the cosmic ray flux. It also modulates the X-ray flux at middle to high latitudes in the stratosphere, that is due to Bremsstrahlung from MeV electr...
متن کاملOutstanding Problems of Presolar Diamond in Meteorites
Diamond is the first mineral type of presolar grains that were isolated from meteorites, yet it is one of the least understood presolar grain types. An isotopically anomalous component Xe-HL is carried by diamond and is characterized by excesses in both the light, p-process only isotopes (124 and 126) and the heavy, r-process only isotopes (134 and 136). These excesses are always correlated alt...
متن کاملGravitational Collapse: The Role of General Relativity1
Stars whose masses are of the same order as that of the sun (M ) can find a final equilibrium state either as a white dwarf or, apparently, (after collapse and ejection of material) as a neutron star. These matters have been nicely discussed in the lectures of Hewish and Salpeter. But, as they have pointed out, for larger masses no such equilibrium state appears to be possible. Indeed, many sta...
متن کاملSome Outstanding Problems in Neutron Transport Computation
As more applications are required of the radiations (e.g., neutrons and photons), be it a nuclear reactor, shielding facility, or a radiation treatment apparatus, the demands on the capability and accuracy of design and analysis are increasing ever to a very high degree. One (perhaps the ultimate) task in designing such a nuclear system is to determine the distribution of the neutrons (and/or p...
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ژورنال
عنوان ژورنال: Nature
سال: 1927
ISSN: 0028-0836,1476-4687
DOI: 10.1038/120368a0