This journal provides immediate access to some articles. Volume 46(4); April 1960 Astronomy INDIGENOUS ORGANIC MATTER ON THE MOON PMCID: PMC222849 BIOLOGICAL CONTAMINATION OF THE MOON PMCID: PMC222850 Biochemistry INTRAMOLECULAR MODELS DEPICTING THE KINETIC IMPORTANCE OF „FIT” IN ENZYMATIC CATALYSIS PMCID: PMC222851 FREE RADICALS IN HEART MUSCLE MITOCHONDRIAL PARTICLES: GENERAL CHARACTERISTICS AND LOCALIZATION IN THE ELECTRON TRANSPORT SYSTEM PMCID: PMC222852 FREE RADICALS IN HEART MUSCLE MITOCHONDRIAL PARTICLES: MECHANISM OF FORMATION PMCID: PMC222853 THE SUSTAINED GROWTH OF HUMAN AND ANIMAL CELLS IN A PROTEIN-FREE ENVIRONMENT PMCID: PMC222854 METABOLISM AND MORPHOLOGY OF RIBONUCLEOPROTEIN PARTICLES FROM THE CELL NUCLEUS OF LYMPHOCYTES PMCID: PMC222855 EVIDENCE FOR HELICAL STRUCTURE IN POLYURIDYLIC ACID PMCID: PMC222856 INHIBITION OF MAMMALIAN GLUCOSE-6-PHOSPHATE DEHYDROGENASE BY STEROIDS PMCID: PMC222857 STRAND SEPARATION AND SPECIFIC RECOMBINATION IN DEOXYRIBONUCLEIC ACIDS: BIOLOGICAL STUDIES PMCID: PMC222858 STRAND SEPARATION AND SPECIFIC RECOMBINATION IN DEOXYRIBONUCLEIC ACIDS: PHYSICAL CHEMICAL STUDIES PMCID: PMC222859 THE RELATION OF UREA TO THE MOVEMENT OF WATER IN LIVER TISSUE PMCID: PMC222860 THE INCORPORATION OF LEUCINE-C14 INTO PROTEIN BY A CELL-FREE PREPARATION FROM MAIZE KERNELS PMCID: PMC222861 REPRESSION OF AN ACETYLORNITHINE PERMEATION SYSTEM PMCID: PMC222862 Botany THE BALANCE BETWEEN COHERENCE AND VARIATION IN EVOLUTION PMCID: PMC222863 Chemistry PARAMAGNETIC DEFECTS IN IRRADIATED KClO4 PMCID: PMC222864 CONTINUOUS ELECTROPHORETIC FRACTIONATION STABILIZED BY ELECTROMAGNETIC ROTATION PMCID: PMC222865 Genetics A NEW HETEROCHROMATIN EFFECT IN DROSOPHILA MELANOGASTER PMCID: PMC222866 INHERITANCE OF ANTI-A1 HEMAGGLUTINATING ACTIVITY IN LIMA BEANS, PHASEOLUS LUNATUS PMCID: PMC222867 THE HUMAN CHROMOSOMAL SATELLITES IN NORMAL PERSONS AND IN TWO PATIENTS WITH MARFAN'S SYNDROME PMCID: PMC222868 Mathematics DIFFERENTIALS AND EXTREMAL LENGTH ON RIEMANN SURFACES PMCID: PMC222869 HOMOLOGY AND HOMOTOPY OF H-SPACES PMCID: PMC222870 ON THE USE OF ABSTRACT ALGEBRA AS A METHOD FOR OBTAINING RESULTS INVOLVING RATIONAL INTEGERS ONLY AND THE REVERSE OF THIS PROCEDURE PMCID: PMC222871 HOMOLOGY THEORIES AND DUALITY PMCID: PMC222872 CONTRIBUTIONS TO INFORMATION THEORY PMCID: PMC222873 Pathology SOME STATISTICAL OBSERVATIONS ON A COOPERATIVE STUDY OF HUMAN PULMONARY PATHOLOGY. III PMCID: PMC222874 Physics ON A THEORY OF DISPERSION BY CONTINUOUS MOVEMENTS PMCID: PMC222875 UNITARY OPERATOR BASES PMCID: PMC222876 Zoölogy ESTRADIOL-17β, ESTRONE, AND PROGESTERONE IN THE OVARIES OF DOGFISH (SQUALUS SUCKLEYI) PMCID: PMC222877 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||