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  • Inorganic Chemistry  (738)
  • General Chemistry  (599)
  • Cell & Developmental Biology  (112)
  • 1960-1964
  • 1935-1939  (1,449)
  • 1936  (1,449)
Collection
Publisher
Years
  • 1960-1964
  • 1935-1939  (1,449)
Year
  • 1
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936) 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
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  • 2
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    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 1-10 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The paraphysis of adult Amblystoma is made up of low columnar ependymal epithelit m which forms the paraphyseal tubules which end blindly and which communicate with one another by a common mouth with the third ventricle. Between the paraphyseal tubules venous sinusoids anastomose freely with one another forming a complicated rete. The sinusoids are made up entirely of endothelium. The blood supply to the paraphysis is entirely venous.Mitochondria were found in great abundance in the paraphysis of one female just previous to laying. Other specimens showed very few present. No conclusions can be drawn from these few observations as to the relationship between physiological activity and cellular structures.The Golgi apparatus was observed definitely localized between the nucleus and the ventricular end of the cell.Many large crystalloids were also observed to be localized between the nucleus and the ventricular end of the cell.Intercellular spaces are readily observed in sections stained with Mallory's connective tissue stain. Nassonow's osmic acid technique for the Golgi apparatus and Benda's crystal violet and alizarin stain clearly bring out the intercellular canals. Acid fuchsin stained particles within the intercellular spaces are more abundant toward the sinusoids than the cavities of the paraphyseal tubules. The intercellular canals have not been seen to communicate with either the sinusoids or the cavities of the paraphyseal tubules in any of the preparations observed.
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  • 3
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    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 91-112 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Increases in weight, total body length, and width and length of the head capsule of Japanese beetle larvae were studied. Since the progression factors decreased with succeeding molts and exhibited considerable variation it was concluded that Przibram's principle is inapplicable. Cells were counted in the mid-intestine and brain. Columnar cells of the mid-intestine were measured. The data show: (a) No increase in cell number occurs at the time of molting. (b) The progression in weight and length cannot be correlated with an increase in cell number. In the first instar the progression for increase in weight was 5.73; while for increase in cell number, it was 1.67 for the mid-intestine, and 1.19 for the brain. In the second instar, the corresponding figures were 5.24, 1.98 and 1.69. In the third instar average weight increased 3.18 times, but there was practically no increase in cell number. Thus, molting does not represent a definite increase in number of cells of the insect's body as suggested by Przibram and Megusar, and Bodenheimer's method of calculating cell divisions seems to have no factual basis. Increase in size of the larva is largely due to an increase in cell size. The ratio of increase in total cell volume of the columnar cells of the mid-intestine is approximately equal to the ratio of weight increase.
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  • 4
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    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 123-161 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: An atypical euchromosome, characterized by the large size and deep stainability of its chromomeres during the meiotic prophase, occurs in representatives of seven genera of Acridinae, viz., Chorthippus curtipennis, Euchorthippus pulvinatus, Stenobothrus lineatus, Omocestus ventralis, Stauroderus biguttulus, Gomphocerus rufus, and Aeropedellus clavatus. This element, which is termed the ‘megameric chromosome,’ stains more deeply than the other euchromosomes also during interkinesis and early spermiogenesis. The megameric chromosomes of the individual exhibit striking similarity in the number, size, and arrangement of their chromomeres through successive stages of the meiotic prophase. All the evidence from cytological study indicates that these chromosomes are intergenerically homologous. This is chiefly significant in the support it gives to the theory of chromosome individuality. The heteromorphic megameric tetrad of one individual of S. biguttulus - unequal because of a deficiency - usually undergoes segregation in the second division. The megameric chromosomes display splits previous to synapsis. Pairing begins at their proximal ends and proceeds distally. All the euchromosomes of the spermatid nucleus show splits in preparation for the first cleavage division of the zygote.
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  • 5
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    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 215-223 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: In a comparative study of the branchial epithelium of fishes we find the occurrence of three distinct types and seven subtypes of intra-epithelial glands which are in intimate association with the branchial epithelium of fishes.These glands have been classified according to their morphological patterns, cytoplasmic content and other features dealing with structural complexity.Although these structures arrange themselves in a graded series which become increasingly more and more complex, there does not appear to be any definite correlation between the structural complexity of the glands, and the apparent evolutionary history of the fishes.We conclude from the characteristic arrangement, relationships, and specific staining reactions that these structures are intra-epithelial mucous glands.
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  • 6
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    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 191-209 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Differing from hitherto known spermatophores, these are found to have the form of a loop with a thick body and the slender ends twisted together.Also one end bears a spiral row of triradiate spicules, unique in being chitinoid secretions. Each is formed within a vacuole of a cell of a small gland found in the males. The ends of the spermatophores hold sperms, but the main mass consists of granules of problematical value. Spermatophores after discharge are stored up within the female, where remnants of them remain indefinitely.For the first time stages in the formation of spermatophores were found within the males. The head organ in the male is found to be more complex than hitherto known in this genus. A special head organ in the female is described for the first time in this family. An hypothesis is advanced as to the possible use of these male and female head organs in transfer of spermatophores. The suggestion is made that in this family the spermatophores and their organs of transfer and of storage may serve as generic characters.
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  • 7
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    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 243-259 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The post-embryonic growth of the notochord, sensory retinal cells, cartilage and gut epithelium in frog tadpoles, trout and lamprey is described. Increase in the number of notochord and sensory retinal cells results only from the mitotic division of cells which have not yet undergone the structural modifications characteristic for these cells. The specialized and functional cell does not divide. In the frog tadpole the cartilage cells increase by mitotic division of the fully-formed and functional cell: in addition there are centers of proliferation consisting of small, rapidly-dividing cells. The trout is similar except that there are no centers of proliferation, in addition amitotic division occurs. The gut epithelium grows by mitotic division of the functional constituent cells. During division the cell assumes a spherical shape and its functional activities are suspended.
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  • 8
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    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. i 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
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  • 9
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Two sizes of cells are found in the mid-gut epithelium of late embryos. The larger cells contain nuclei having twice the number of prochromosomes and nearly twice the volume as compared with the nuclei of the smaller cells. During each larval instar, the nuclei of the functional mid-gut epithelium nearly double their volume and there is a corresponding increase in the amount of chromatin. It is suggested that chromosome division without nuclear division occurs in these epithelial cells during the pre-ecdysial periods of each instar. The mid-intestinal epithelial cells and their nuclei undergo characteristic changes during the feeding and pre-ecdysial periods of each instar. Prochromosomes as well as cytoplasmic globules, which represent a cytoplasmic diminution process, are visible in the latter period. The regeneration cells which give rise to the pupal and mid-gut epithelia have origin from the small embryonic mid-gut cells and from nuclei and cytoplasm derived from the larval epithelium by means of an apparent ‘pseudoreduction’ of the large larval nuclei during the late third and fourth instars.
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  • 10
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The bodies of Eberth in the skins of tadpoles appear in young stages as fine threads and develop into heavy, amorphous masses in close contact with the basal membranes of the epidermal cells. They possess extensions which pass from the epidermal cells through their membranes into the corium. During metamorphosis, when the amount of dermal connective tissue is greatly increased, the bodies disappear the more distal first and the most proximal latest. The processes which pass into the dermis are the last parts to remain visible. Examination of a series of stages suggests that they pass through the cell membranes of the epidermis and into the corium. The bodies then, may be regarded as reserve accumulations of secreted material which are used up in the formation of dermal connective tissue. This explanation accounts for three otherwise unexplained peculiarities of the skin of the developing frog: (1) the presence and growth of the bodies of Eberth; (2) their disappearance during metamorphosis; (3) the sudden large increase in connective tissue fibers of the dermis at metamorphosis.
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  • 11
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The skins of normal and x-rayed tadpoles and frogs were compared. Almost no mitotic figures occurred after the tenth day of larval life. The number of mitoses and the length of the period during which mitosis occurred were reduced by x-rays in proportion to the exposure. Spindle-shaped cells were found on the vertical connective tissue fiber bundles which connect the lower layer of the dermis with the under side of the epidermis in adult frogs. After exposure to 4000 r the number of these cells, which are believed to be traveling up the vertical strands to join the epidermis, was doubled. New, uninjured cells appeared in the basal epidermal layer following this increase. Since no appreciable number of mitotic divisions and no amitotic divisions were found in the epidermis, either normally or during the regeneration following exposure to x-rays, these ‘traveling-cells’ are held to be an important source of replacement in correlation with normal desquamation as well as desquamation caused by the irradiation.
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  • 12
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    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 453-483 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Two genera of the Phallostethid fishes were anatomized using both the clearing and the dissection methods. While resembling Poecillids and agreeing with them in numerous anatomical features, these fish are true Acanthopterygians and apparently are correctly placed by Myers in the suborder Phallostethoidea erected for them in the order Percesoces. The two divergent types of priapia found in the group are readily derivable one from the other, corresponding bone for bone. The priapial bones can be homologized with the missing pelvic fins and girdle plus, perhaps, the post cleithrum and some of the pectoral pterygials. A comparison is made between the Phallostethid priapial skeleton and the highly modified girdle complex of the Polynemids.
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  • 13
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The coleopteran Micromalthus debilis LeConte has two additional female reproductive forms besides the male and female adults. One of these is a paedogenetic viviparous female which produces female offspring by diploid parthenogenesis; the other is a paedogenetic ovoviviparous female which produces males by haploid parthenogenesis; The male has been shown to be somatically haploid in both early and late stages of development, while all three female types are diploid. The first spermatocyte division is completely abortive as regards division of chromosomes and cell. However, a very characteristic unipolar spindle is regularly formed. The chromosomes of the first spermatocyte anaphase move away from the single pole with their attachment regions hindermost. The spindle consists of ten fibers, each one connecting a chromosome with a single pole. They elongate during the anaphase. The second spermatocyte division is apparently normal in all respects and it ultimately results in two normal sperm. It has been shown that the theories of Belar, Bleier and Schaede concerning the problem of chromosome movement are deficient in view of the peculiarities of this monocentric mitosis.
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  • 14
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    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 589-601 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The test consists of a clear matrix in which cells, fibrils, spicules and vascular tubes are embedded. It is supplied with two main blood vessels which ramify in the test substance and end in a large number of vascular ampullae near the outer surface of the test. Three different kinds of spicules are present. The test cells are of five different kinds. Besides these cells, the author has, for the first time in the history of our knowledge of the Tunicata, demonstrated the presence of nerve cells, nerve fibers and receptor cells in the test. The nerve cells are found throughout the test (except the foot) but are more numerous in the test of the siphons. The epithelial cells of the vascular ampullae act as receptor organs being supplied with nerve fibers that connect them with the nerve cells of the test. Receptor cells are also present in the regions of the test devoid of ampullae (except the foot). Stimuli are received by the receptor cells and conducted by nerve fibrils to the nerve cells, which are in turn connected with the nerve ganglion. The test, therefore, not only serves for the protection and attachment of the animal but also acts as a respiratory and receptor organ.
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  • 15
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    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 1-11 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Nuclei of columnar epithelia of vertebrate embryos move to the free epithelial surface before a division, the movement of the nucleus accompanying a shortening of the columnar cell. After division at the free surface the daughter cells elongate, the nuclei passing away from the free surface. This is illustrated by drawings and measurements of cells of the fore-gut it of the garter snake embryo. The elongation of these cells after mitosis is associated with an elongation of the spindle fibers to produce a prominent cytoplasmic fiber which persists through the interkinetic stage and into the next mitosis. The appearance of nests of nuclei in mitosis is accounted for by the fact that descendants of an earlier cell have kept approximately in step in their divisions.
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  • 16
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Residual germ cells larger than primary spermatogonia but similar in other respects are found throughout the testis in the walls of the lobules and in the cysts of developing germ cells. There is no evidence for germ cell migration through the testis. Spermatogonia arise in situ from residual cells.Forty-two chromosomes are found in the spermatogonial cells. Two of these chromosomes are much larger than the others and possibly represent sex chromosomes. The haploid chromosome number as seen in primary spermatocyte cells is twenty-one. A large ovoid chromosome, considered to be a sex chromosome, lags during the formation of the primary spermatocyte spindle. It divides after the division of the other chromosomes into equal chromosomes which pass to opposite poles of the spindle.The evidence for sex chromosomes as presented here is meagre but is consistent with the evidence from chromosome studies in other teleosts. It has been proposed that sex chromosomes are in a nascent condition and hence are differentiated but little from autosomes and also that the members of the sex chromosome pair are morphologically alike.
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  • 17
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: A cytological study of the hypophyses of more than 100 female bats, collected at fortnightly intervals from October to April, is reported. The bats were decapitated within 24 hours after collection. and then hypophyses fixed in Champy's fluid or Helly's fluid followed by staining by the acid fuchsin-thionin-aurantia method of Kull.The pars distalis, pars intermedia, and pars nervosa lie adjacent to one another in the flattened gland. In some hypophyses the lumen of the original buccal evagination persists as a narrow residual cleft which may be expanded to form ciliated vesicles.Observations on cell size. nucleoplasmie ratio, degree of chromaticity in the nucleus, staining reactions of the cytoplasm and secretory granules, and the presence of chondriosomes, secretory granules, and vesicles in the cytosome are recorded. Secretory cells and histiocytes are idintified. Sceretoty cells are found in successive stages of growth, differentiation, secretion, and degeneration. Cells which have discharged their secretion apparently do not resynthesize secretory granules. Mitosis is not observed. The available evidence suggests utilization of a large supply of embryonic cells as the source of the fully differentiated cells. The cells of the pars intermedia are interpreted as potential secretory cells which do not differentiate under the inadequate nutrient conditions of that region.
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  • 18
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Eleven segments are recognized in a comparative study of the abdomens in immature and adult instars of Lipeurus heterographus Nitzsch.The abdomen of the first instar appears ten segmented but with the apparent first segment twice as long as any one of the others and with two transverse rows of hairs on the tergum while the other abdominal segments have but one. This indicates that the apparent first segment is the true first and second abdominal segments which have fused. The apparent tenth segment of the abdomen is the true eleventh segment. A fusion of the true ninth and tenth segments occurring in the third molt further reduces the number of segments to nine which is the apparent number of segments found in the adult.
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  • 19
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    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 261-277 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: A study has been made of 155 Lebistes embryos, extending from fertilization until birth of the young. A period of embryonic hermaphroditism begins soon after the formation of the genital ridges (3.0 mm.) and continues until birth (6.5 to 7.0 mm.). Development is first ovarian; evidence is the universal occurrence, in all gonads, of many germ cells in typical ovarian synapsis. The gonads of one-half of the embryos soon become testicular while those of the other half continue to develop as ovaries. In testicular gonads, all synaptic germ cells undergo pycnotic dissolution as the gonad hilus organizes into a prospective medulla. In ovaries, germ cells in synapsis continue to enlarge as definitive ovocytes. This embryonic hermaphroditism supports Witschi's explanation of sex determination in Lebistes, based on his own work on frogs and on Winge's discovery of unusual XX males in Lebistes. The embryology of gonads in Lebistes also suggests that in teleosts, as in amphibians, birds, and mammals, gonads develop from two distinct portions, a male medulla and a female cortex.
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  • 20
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    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 287-315 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The musculature of forearm and manus basically is divisible into dorsal matrix and ventral matrix of elbow, and dorsal matrix and ventral matrix of the podium. The former contributes to the present musculature of brachium and antibrachium, and the latter to the musculature of antibrachium and podium. The forearm muscles of the former category are divisible into humero-radial (carpi radialis), humero-podial (digitorum communis et sublimis), and humero-ulnar (carpi ulnaris) components. The deep muscles of the forearm (mm. abductor pollicis longus, extensor pollicis longus, extensor indicis proprius; flexores digitorum profundus et pollicis longus) have been derived from podial matrices that have migrated proximally along the ulna. The short flexors of the hand have been derived from a superficial and a deep basic series: From the former have come mm. palmaris brevis, abductor pollicis brevis, superficial head of the flexor pollicis brevis, abductor et flexor digiti 5, and lumbricales. From the deep series have been derived mm. contrahentes (including adductor pollicis), interossei, opponens pollicis, deep head of flexor pollicis brevis, and opponens digiti 5.
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  • 21
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    Journal of Morphology 59 (1936), S. 11-67 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: In a study of the nuclear behavior of Paramecium aurelia, a process of self-fertilization, autogamy, has been discovered and traced through its essential steps. Autogamy is the counterpart, in a single animal, of conjugation. In autogamy, three micronuclear divisions lead to the formation of the gametic nuclei. These divisions are considered to be maturation divisions. The first division is characterized by a great increase in the size of the two vegetative micronuclei and the occurrence of long thread-like crescents. The second division results in the formation of eight nuclei, variable numbers of which continue to divide giving rise to the potential gametic nuclei. Two of the latter unite to form a synkaryon. The old macronucleus disintegrates. The fusion nucleus divides twice: two of the daughter nuclei become macronuclear anlagen, while the other two remain micronuclei. The macronuclear anlagen are distributed to two daughter cells at the time of the first cell division, when the micronuclei divide.The macronuclear changes in hemixis can be classified into three main types: (1) the extrusion of a relatively small number of spherical chromatin fragments; (2) the splitting of the macronucleus into two (generally) large independent portions - accompanied, or not, by the extrusion of smaller spherical bodies; (3) the complete disorganization by fragmentation of the macronucleus.
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  • 22
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    Journal of Morphology 59 (1936), S. 313-325 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Parabrotula dentiens is a viviparous deep sea Brotulid fish. The embryos at the 6 mm. stage are held within the ovarian cavity as are the embryos of Zoarces, the Embiotocidae, the Goodeidae, the Jenynsiidae and the Anablepidae in the later stages. The embryos of Parabrotula dentiens are equipped with external processes which are attached around the anus and to the ventral wall of the embryo for a short distance in front of the anus. The processes have a spongy connective tissue stroma and are covered with a syncytial layer. It is assumed that the processes augment the body surface of the embryos and have a nutrition-absorbing and an oxygen-absorbing function.
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  • 23
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    Journal of Morphology 59 (1936), S. 265-311 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The development of the dorsal axial musculature is traced from Eryops, through Diadectes, to Dimetrodon. lguana, a modern form, is used for comparison. The axial muscles of a primitive form, such as Eryops, were thick, fleshy, and metameric; those of more advanced types, such as Dimetrodon, were light, highly tendinous, and largely unsegmented. Diadectes represents an intermediate stage. The changes in the muscles and related changes in the axial skeleton are closelyassociated with the development of active, terrestrial animals.
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  • 24
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    Zeitschrift für anorganische Chemie 226 (1936), S. 265-272 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurde die Einwirkung von Ammoniak auf Mercuronitrat und -chlorid untersucht und gefunden, daß primär eine Mercuriamidoverbindung entsteht, welche mit je nach den Umständen wechselnder Geschwindigkeit in Mercuriamidoverbindung und elementares Quecksilber zerfällt: \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm NH}_{\rm 2} - {\rm Hg}_{\rm 2} - {\rm X} \mathbin{\lower.3ex\hbox{$\buildrel\textstyle\rightarrow\over{\smash{\leftarrow}\vphantom{_{\vbox to.5ex{\vss}}}}$}} {\rm NH}_{\rm 2} - {\rm Hg} - {\rm X + Hg}{\rm .} $$\end{document} Durch Eliminieren einer der Komponenten der rechten Seite läßt sich der Zerfall beschleunigen und vervollständigen.
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  • 25
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    Zeitschrift für anorganische Chemie 226 (1936), S. 321-332 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Überleiten von CO-Gas über die technisch wichtigsten Metalloxyde und Metalle bei verschiedenen Temperaturen wurde der Vorgang der Kohlenoxydspaltung studiert.
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  • 26
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    Zeitschrift für anorganische Chemie 226 (1936), S. 341-349 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bei der Neuentwicklung und Anwendung kolorimetrischer Methoden ist zu beachten, daß das Absorptionsspektrum eines färbenden Bestandteils durch Solvatationsvorgänge beeinflußt wird.
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    Zeitschrift für anorganische Chemie 226 (1936), S. 350-352 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
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    Zeitschrift für anorganische Chemie 227 (1936), S. 17-24 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird die Darstellung reinsten Germaniumtetrachlorids beschrieben.
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    Zeitschrift für anorganische Chemie 226 (1936), S. 257-264 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Entstehungsbedingungen und Eigenschaften des von HARTMANN und BRENTSCHNEIDER beobachteten amorphen metallischen Kathodenproduktes bei der Wolframelektrolyse in Phosphatschmelzen werden näher untersucht.
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    Zeitschrift für anorganische Chemie 227 (1936), S. 43-51 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Reaktion: NaCl + HBr ⇄ NaBr + HCl wird auf ihre Gleichgewichte bei 850 und 950° von beiden Seiten untersucht. Der Bodenkörper besteht aus einer homogenen Schmelze von NaBr und NaCl. Es gilt das Molenbruchmassenwirkungsgesetz sehr gut, so daß die Idealität der Schmelzen NaCI, NaBr nach-gewiesen ist. Die Wärmetönung ΔW der Reaktion ergibt sich zu -3400 cal.
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    Keywords: Chemistry ; Inorganic Chemistry
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    Notes: Wismut verbindet sich mit Perchlorsäure außer zum neutralen Salz Bi(ClO4)3 zu drei gut definierten, basischen Salzen, in denen sich Wismut und Perchlorat in den molaren Verhältnissen 1:1, 3:2 und 2:1 befinden. In wäßriger Lösung setzt sich das neutrale Salz in das Bismutylperchlorat um. Während dieses in Wasser sehr leicht löslich ist, lösen sich die beiden anderen Salze nur zu etwa 1/40 Mol/Liter. Mit HiIfe von konduktometrischen, potentiometrischen und thermometrischen Titrationen, Bestimmung des Molekulargewichtes nach der Diffusionsmethode und Aufnahme der optischen Absorptionsspektren wurde versucht, die Existenzbereiche der verschiedenen basischen Salze in Lösung bei Gegenwart von überschüssiger Perchlorsäure bzw. überschüssigem Natriumperchlorat zu bestimmen. Es ergab sich daß, daß in 0,1 m-Lösung (in bezug auf BiOOH) das neutrale Salz nur in sehr stark sauren Lösungen beständig ist und bereits beim Verhältnis 6,s Mole Perchlorsäure: 1 Mol Bismutylhydroxyd vollständig zu dem im festen Zustand noch nicht sicher bekannten BiOH(ClO4)2 hydrolysiert ist. Dieses hydrolysiert beim Verkleinern der Perchlorsäurekonzentration unter gleichzeitiger Aggregation zu der Verbindung (BiOH)2O(ClO4)2·aq. Diese Reaktion ist beim Verhältnis 2,5 Mole Perchlorsäure auf 1 Mol Bismutylhydroxyd augenscheinlich zu Ende und es setzt nun ein weiterer Kondensationsvorgang zu (BiOH)4O3(ClO4)2·aq. ein. Infolge der Schwerlöslichkeit dieses Produktes ließen sich in der Lösung keine Untersuchungen mehr anstellen. Bei Gegenwart von überschüssiger Lauge setzt sich der Bodenkörper allmählich um zu gut kristallisiertem Wismutoxyd.
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    Zeitschrift für anorganische Chemie 227 (1936), S. 113-123 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Eine ergänzende Untersuchung des Systems Co—CoS nach thermischen, mikroskopischen und röntgenographischen Verfahren bestätigte die Ergebnisse, die 1908 von Friedrich erhalten wurden, bezüglich der Lage der Erstarrungs- und Umwandlungstemperaturen und der Zahl der auftretenden Kristallarten. Darüber hinaus gelang die genauere Festlegung der Homogenitätsgebiete dieser einzelnen Phasen wie folgt: 1Co zeigt kein oder nur ein außerordentlich geringes Lösevermögen für S.2Die β-Phase (Co4S3) ist nur bei Temperaturen oberhalb 787° beständig, ihre größte Ausdehnung umfaßt 1,3%. Der eutektoide Zerfall in Co + γ läßt sich durch Abschrecken nicht oder zum mindesten nur sehr unvollkommen unterdrücken.3Stöchiometrisch zusammengesetztes CoS erscheint nicht homogen. Eine homogene Phase entsteht erst mit mehr Schwefel (∼ CoS1,05). Diese Phase ist als σ-Phase bezeichnet..
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    Zeitschrift für anorganische Chemie 227 (1936), S. 179-183 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bei Versuchen über die Zusammensetzung des Kaolinmoleküls (der Tonsubstanz) ist zu berücksichtigen, daß der als Versuchsmaterial verwendete Zettlitzer Kaolin nicht zu 100% aus reiner Tonsubstanz besteht, sondern mindestens 10%, Beimengung in Form von Feldspat und Glimmerresten enthält. Aus diesem Grunde kann eine Wasserabbaukurve niemals 2 Mol H2O anzeigen. Es erscheint demnach durchaus verständlich, wenn Körner, Pukall und Salmang bei einem isobaren Abbau nur etwa 1,5 Mol gebundenes Wasser feststellen konnten. Da eine hydrothermale Synthese des Kaolins aus Feldspat, Glimmer usw. möglich ist, gelingt es auch, die in gewöhnlichem Kaolin vorliegenden Beimengungen durch eine hydrothermale Nachbehandlung in Kaolin umzuwandeln. Bei einem so behandelten Kaolin läßt sich der Gehalt an gebundenem Wasser bis auf 1,76 Mol H2O erhöhen. Hieraus ist zu schließen, daß die Zusammensetzung der Tonsubstanz, wie allgemein angenommen, der Formel Al2O3·2 SiO2·2H2O entspricht.
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    Zeitschrift für anorganische Chemie 227 (1936), S. 237-248 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Das dreiwertige Ruthenium bildet stark komplexe Ammine mit der Koordinationszahl 6.
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    Zeitschrift für anorganische Chemie 227 (1936), S. 272-272 
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    Zeitschrift für anorganische Chemie 228 (1936) 
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    Zeitschrift für anorganische Chemie 228 (1936), S. 129-159 
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    Zeitschrift für anorganische Chemie 228 (1936) 
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    Zeitschrift für anorganische Chemie 228 (1936), S. 209-212 
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    Zeitschrift für anorganische Chemie 228 (1936), S. 249-254 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
    Notes: Mercuroamidochlorid, das Produkt der Einwirkung von Ammoniak auf Kalomel, ist eine einheitliche Substanz, welche in trockenem Zustande bei Zimmertemperatur vollständig haltbar ist.
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    Zeitschrift für anorganische Chemie 228 (1936), S. 275-296 
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    Zeitschrift für anorganische Chemie 228 (1936) 
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    Zeitschrift für anorganische Chemie 228 (1936), S. 352-356 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
    Notes: Die von A. Krause und Mitarbeitern nach verschiedenen Verfahren hergestellten Silberferrite wurden röntgenographisch nach der Methode yon Debye-Scherrer untersucht. Sie zeigten sämtlich das gleiche Röntgendiagramm, dessen Auswertung mit Sicherheit rhomboedrische Symmetrie erkennen ließ. Nähere Einzelheiten sind im Text zu finden.
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    Zeitschrift für anorganische Chemie 229 (1936), S. 16-18 
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    Zeitschrift für anorganische Chemie 229 (1936), S. 36-44 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
    Notes: Sowohl die kristallwasserhaltige Unterphosphorsäure H4P4O4, 2H2O, als auch die kristallwasserfreie Säure H4P2O6 erleidet schon bei Zimmertemperatur eine chemische Umwandlung. Es wird gezeigt, daß die kristallwasserfreie Säure dabei in eine isomere Säure oder in ein Gemisch isomerer Säuren umgelagert wird. Die wahrscheinlichen Strukturformeln dieser Isomeren werden diskutiert.
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    Zeitschrift für anorganische Chemie 229 (1936) 
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    Zeitschrift für anorganische Chemie 229 (1936), S. 112-128 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
    Notes: Durch Behandeln von PH3 mit Br2, PBr5 und PCl5 gelang es unter den verschiedensten experimentellen Bedingungen nicht mit Sicherheit, die Existenz teilhalogenierter Phosphine nachzuweisen.
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    Zeitschrift für anorganische Chemie 229 (1936), S. 175-187 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
    Notes: Für das Zustandekommen anomaler Mischkristalle mit NH4Cl wird folgende Regel aufgestellt: Schwermetallchloride, die mit NH4Cl entweder keine Doppelsalze bilden können oder solche, die in sehr hohem Maße dazu befähigt sind bzw. solche, deren Doppelsalze schwer löslich sind, geben keine anomalen Mischkristalle mit NH4Cl. Schwermetallchloride, die nur dann Doppelsalze mit NH4Cl bilden, wenn die Lösung genügende Mengen dieser Chloride enthält, neigen in an Schwermetallchloriden armen Lösungen zur Bildung anomaler Mischkristalle.
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    Zeitschrift für anorganische Chemie 229 (1936), S. 252-264 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
    Notes: Die Hypothese von HANTZSCH und ROSENBLATT, daß die Tetramminplatosalze Diacidoverbindungen sind, läßt sich nicht auf-rechterhalten.
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    Zeitschrift für anorganische Chemie 229 (1936), S. 285-299 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In wäßrigen Lösungen von basischem Bleiperchlorat und Bleiazetat würden Überführungsmessungen, Leitfähigkeitsmessungen sowie Bestimmungen der Gefrierpunktsdepression und der Pb..-Ionenkonzentration bei verschiedenen Verdünnungen durchgeführt. Bei allen Versuchen kam auf 1 Mol Neutralsalz 1 Mol Bleioxyd.
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    Zeitschrift für anorganische Chemie 229 (1936) 
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    Zeitschrift für anorganische Chemie 229 (1936), S. 321-336 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
    Notes: Aus den besprochenen Untersuchungen geht hervor, daß ein Calciumion sich mit einem Lactation zu dem einfach positiv geladenen Ion CaC3H5O3+ vereinigt. Da eine solche Komplexbildung nur in gleichzeitiger Gegenwart einer Alkoholgruppe und einer negativ geladenen Gruppe stattfindet, müssen diese Gruppen an der Komplexbildung teilnehmen. So tritt z. B. Komplexbildung ein in calcium-hydroxydhaltigen alkoholischen Zucker- und Glycerinlösungen, wogegen in Acetatlösungen oder in den Lösungen anderer Salze der Fettsäuren keine Komplexbildung eintritt. Auch in nichtionisierter Milchsäure sind Hydroxylgruppe und negativ geladene Gruppe nicht gleichzeitig vorhanden und es tritt daher auch keine Komplexbildung mit der freien Säure ein. Die Komplexbildung geht nach folgender Gleichung vor sich: C3H5O3- + Ca++ = C3H5O3Ca+.
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    Zeitschrift für anorganische Chemie 229 (1936), S. 337-351 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
    Notes: Es werden Methoden zur analytischen Bestimmung von Fluor neben Gallium, Indium und Thallium angegeben.
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    Zeitschrift für anorganische Chemie 229 (1936), S. 352-356 
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    Zeitschrift für anorganische Chemie 229 (1936), S. 357-368 
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    Zeitschrift für anorganische Chemie 229 (1936), S. 410-412 
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    Zeitschrift für anorganische Chemie 229 (1936), S. 401-409 
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    Topics: Chemistry and Pharmacology
    Notes: Ungefähr 200 Präparate von basischem Bleisulfat sind nach verschiedenen Verfahren hergestellt worden.
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    Zeitschrift für anorganische Chemie 229 (1936), S. 413-417 
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    Zeitschrift für anorganische Chemie 229 (1936), S. 423-428 
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    Topics: Chemistry and Pharmacology
    Notes: Wir glauben gezeigt zu haben, daß beim thermischen Zerfall des F2O2 ein Gas entsteht, das in seinen Eigenschaften mit denen eines Fluor-Sauerstoffgemisches übereinstimmt.
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    Zeitschrift für anorganische Chemie 230 (1936), S. 129-147 
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    Zeitschrift für anorganische Chemie 226 (1936), S. 97-125 
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    Zeitschrift für anorganische Chemie 226 (1936), S. 141-144 
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    Zeitschrift für anorganische Chemie 226 (1936), S. 289-309 
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    Notes: Es wurden aus vier uranhaltigen Mineralien verschiedener Herkunft und verschiedenen geologischen Alters reine Uranpräparate gewonnen und die Atomgewichte dieser Uranproben bestimmt.
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    Zeitschrift für anorganische Chemie 226 (1936), S. 333-337 
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    Zeitschrift für anorganische Chemie 226 (1936), S. 370-384 
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    Topics: Chemistry and Pharmacology
    Notes: 1. Es werden Versuche ausgeführt, das Dibrommonoxyd in der Gasphase darzustellen und die Gründe diskutiert, die dazu führen, das Oxyd auf diesem Wege nicht in größeren Konzentrationen zu erhalten.
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    Zeitschrift für anorganische Chemie 226 (1936), S. 425-428 
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    Zeitschrift für anorganische Chemie 227 (1936), S. 25-31 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Semicarbazide bilden Komplexverbindungen, in welchen sie zwei Koordinationsstellen besetzen. Das Metall ist an das Sauerstoffatom und die Hydrazingruppe gebunden. Von Nickel wurden außer Verbindungen von den Typen [NiSem2] und [NiSem3]X3 auch rote, innerkomplexe Verbindungen erhalten, welche sich von dem Semicarbazid durch Ersatz eines Wasserstoffatoms durch ein Äquivalent Nickel ableiten.
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    Zeitschrift für anorganische Chemie 226 (1936), S. 338-340 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
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    Zeitschrift für anorganische Chemie 226 (1936), S. 359-369 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Es werden die bisher bekannten Chloride, Bromide, Oxyde und Sulfide des Vanadins dargestellt und magnetisch bei Zimmertemperatur, -78°C und -183O°C untersucht.
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    Zeitschrift für anorganische Chemie 226 (1936), S. 416-424 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Von den 5 in der Literatur angeführten Quecksilbersulfit-verbindungen des Kaliums und des Natriums: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {[\rm Hg^{Cl}_{SO_3}]K,} \\ {\rm [Hg(SO_3)_2]K_2,} \\ {\rm HgSo_3 \cdot ClNa,} \\ {\rm Na_2SO_3 \cdot 2HgSO_3} \\ {\rm {und}\,\, [Hg(SO_3)_2]Na_2} \end{array}$$\end{document} konnten wir auf potentiometrischem Wege nur von den 3 folgenden die Existenz bestätigen, und zwar: \documentclass{article}\pagestyle{empty}\begin{document} $$\begin{array}{*{20}c} {\rm [Hg^{Cl}_{SO_3}]K}, \\ {\rm [Hg(SO_3)_2K_2} \\ {\rm und\,\,[Hg(SO_3)_2]Na_2} \end{array} $$\end{document}.
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    Zeitschrift für anorganische Chemie 227 (1936), S. 32-36 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die 6-Hydrate der Doppelfluoberyllate M2 IBeF4·M11BeF4·6H2O (MI= Rb und MII = Ni, Co, Zn, Cu, Cd und FeII( wurden beschrieben; auch Cs2BeF4·NiBeF4·6H2O ist erhalten worden. Diese Doppelsalze sind Analoga der von Locke und Tutton untersuchten Doppelsulfate; Zusammensetzung und Eigenschaften beweisen die Analogie des BeFi4″-ions mit dem SO4″-ion.
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    Zeitschrift für anorganische Chemie 227 (1936), S. 214-220 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
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    Zeitschrift für anorganische Chemie 227 (1936), S. 226-226 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: No. Abstract.
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    Zeitschrift für anorganische Chemie 226 (1936), S. 175-176 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Zeitschrift für anorganische Chemie 226 (1936), S. 197-200 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Zeitschrift für anorganische Chemie 226 (1936), S. 139-140 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Zeitschrift für anorganische Chemie 226 (1936), S. 168-172 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Zeitschrift für anorganische Chemie 226 (1936), S. 185-191 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
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    Zeitschrift für anorganische Chemie 226 (1936), S. 209-221 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Zeitschrift für anorganische Chemie 227 (1936), S. 337-340 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Das schwerlösliche, beim Versetzen von Flußsäure mit Rubidiumcarbonat in kleinen Mengen entstehende Salz ist Rubidiumsilicofluorid.
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    Zeitschrift für anorganische Chemie 227 (1936), S. 353-375 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Als Beispiel einer Zerfallsreaktion an einfachen Mehrstoffkatalysatoren wird der Zerfall des Ameisensäuredampfes an Silber-Gold- und Kupfer-Gold-Legierungen nach der statischen Methode untersucht.
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    Zeitschrift für anorganische Chemie 227 (1936), S. 221-224 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Zeitschrift für anorganische Chemie 228 (1936), S. 19-27 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Zeitschrift für anorganische Chemie 228 (1936), S. 49-56 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Zeitschrift für anorganische Chemie 228 (1936), S. 83-88 
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    Zeitschrift für anorganische Chemie 226 (1936), S. 173-174 
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    Zeitschrift für anorganische Chemie 226 (1936), S. 192-196 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Zeitschrift für anorganische Chemie 226 (1936), S. 222-224 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Zeitschrift für anorganische Chemie 227 (1936), S. 1-16 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The system niobium-chlorine has been investigated.The formation of niobiumtrichloride, with a composition range from NBcl2,67 to NbCl3.1, has been studied by thermal decomposition of niobium tetrachloride reduction of NBCl5 with hydrogen, and the chemical transport reaction: \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm NbCl}_{\rm x} {\rm f} + \left( {4 - {\rm x}} \right){\rm NbCl}_{\rm 5} {\rm g} = \left( {5 - {\rm x}} \right){\rm NbCl}_{\rm 4} {\rm g} $$\end{document}.
    Notes: Das Das Niobtrichlorid besitzt einen großen Homogenitätsbereich. Die Phasengrenzen liegen bei den Zusammensetzungen NbCI3,1 und NbCL2,67. Diese Grenzzusammensetzungen fallen schon beim thermischen Abbau des Niobtetrachlorids und bei der Reduktion yon NbCl5 nit H2 auf. Weiteren Aufschluß geben Experimente, bei denen die Trichlorid- phase NbClx durch eine chemische Transportreaktion \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm NbCl}_{\rm x} {\rm f} + \left( {4 - {\rm x}} \right){\rm NbCl}_{\rm 5} {\rm g} = \left( {5 - {\rm x}} \right){\rm NbCl}_{\rm 4} {\rm g} $$\end{document} als Gleichgewichtsbodenkörper gewonnen wird. Die Zusammensetzung der Trichlorid-phase hängt in der zu fordernden Weise vom NbCl5-Druck ab. Aus Pulverdiagrammen und aus der Farbe dcr Trichlorid-Präparate läßt sich ebenfalls die Breite der Trichlorid- phase und auch die Zusammensetzung eines im homogenen Gebiet liegenden Präparats ableiten.Angaben über das Niobtrichlorid hinsichtlich seines thermischen und chemischen Verhaltens werden zusammengestellt.Niob)II(-chlorid wird aus Nb + NbCl2,67 gewonnen. Auch beim Erhitzen von Nb im NbCl5-Argon-Strom und bei der Reduktion von NbCl2 mit H2 ist die NbCl2-Bildung nachweisbar. NbCl2 besitzt keine erhebliche Phasenbreite. Das chemische und thermische Verhalten des NbCl2 werden studiert.Das metallische Niob löst keine nachweisbaren cl-Mengen. Ein Niob(I)-chlorid wurde nicht gefunden.Zusammenfassend werden die Phasenverhältnisse im System Niob-Chlor dargestellt, und weitere Probleme der Trichloridphase erörtert.Das letzte Kapitel bringt Analysenverfahren.
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    Zeitschrift für anorganische Chemie 227 (1936), S. 94-102 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Zeitschrift für anorganische Chemie 227 (1936), S. 107-111 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Zeitschrift für anorganische Chemie 227 (1936), S. 124-128 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch potentiometrische Titrationen wurden folgende Verbindungen nachgewiesen: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {1.} \hfill & {[{\rm Ag}_{\rm 2} ({\rm S}_{\rm 2} {\rm O}_{\rm 3} )_2 ]{\rm Sr} \cdot {\rm H}_{\rm 2} {\rm O}} \hfill \\ {2.} \hfill & {[{\rm Ag}_{\rm 2} ({\rm S}_{\rm 2} {\rm O}_{\rm 3} )_3 ]{\rm Sr}_{\rm 2} \cdot 6{\rm H}_{\rm 2} {\rm O,}} \hfill \\ \end{array} $$\end{document} die bei der Einwirkung von AgNO3 auf SrS2O3 entstehen.
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    Zeitschrift für anorganische Chemie 227 (1936), S. 62-64 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
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    Zeitschrift für anorganische Chemie 227 (1936), S. 52-61 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird das Gleichgewicht: und das Gleichgewicht bei 800° C ermittelt. Für K = \documentclass{article}\pagestyle{empty}\begin{document}$ K = \frac{{N_{{\rm KCl}}^{\rm 2} }}{{N_{{\rm KBr}}^{\rm 2} }}\frac{{p_{{\rm Br}_{\rm 2} } }}{{p_{{\rm Cl}_{\rm 2} } }} $\end{document} ergibt sich der Wert 303, für \documentclass{article}\pagestyle{empty}\begin{document}$ K = \frac{{p_{{\rm Cl}_{\rm 2} } p_{{\rm Br}_{\rm 2} } }}{{p_{{\rm BrCl}_{\rm 2} }^{\rm 2} }} $\end{document} der Wert 0,122.
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    Zeitschrift für anorganische Chemie 227 (1936), S. 81-93 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Auf die Dissoziationserscheinungen der Gashydrate zu Eis und Gas ist das Massenwirkungsgesetz anwendbar. Die Stabilität der Gashydrate wächst mit der Zunahme des Dipolmomentes und der Molekularrefraktion des Gases, auch in der Edelgasreihe, in der am reaktionsfähigsten Radon sein sollte. Aus dem Massenwirkungsgesetz folgt, daß in der Gasphase der Hydratationskoeffizient des Gases bei konstanter Konzentration der Wasserdämpfe konstant bleibt bei Abnahme des Gasdruckes. Also selbst bei den verschwindenden Konzentrationen von Radon in der Gasphase muß ein Teil von dessen Atomen hydratiert sein. Das Radon kann bei einer Temperatur von - 3,5° quantitativ von der festen Phase SO2-Hydrat aufgenommen werden. Rn wird zwischen der Gasphase und den Kristallhydraten SO2·6H2O und H2S·6H2O nach dem Teilungsgesetz der Substanz zwischen zwei unmischbaren Phasen verteilt. Die Teilungskonstante D bei t = - 3,5° ist im Falle der Verteilung von Radon zwischen der Gasphase und den Kristallen SO2·6H2O gleich 0,57, im Falle der Verteilung zwischen der Gasphase und den Kristallen H2S·6H2O gleich 2,4. Damit wird die Existenz der Verbindung von Rn mit Wasser bewiesen, welcher die Formel Rn·6H2O zuzuschreiben ist. Die Stabilität dieser Verbindung muß ein Mittleres zwischen der Stabilität des SO2-Hydrats und des H2S-Hydrats sein, d. h. diese Verbindung muß einen Dissoziationsdruck gleich 1 Atm. über O° besitzen. Unter Benutzung der verschiedenen Reaktionsfähigkeit in betreff der Hydratbildung kann die quantitative Trennung einiger Elemente der Nullgruppe voneinander auf rein chemischen Wege durchgeführt werden.
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    Zeitschrift für anorganische Chemie 227 (1936), S. 129-144 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
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    Zeitschrift für anorganische Chemie 227 (1936), S. 145-178 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Zeitschrift für anorganische Chemie 227 (1936), S. 184-192 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
    Notes: Zur Aufklärung der sich zwischen dem von Aston aus massenspektroskopischen Daten berechneten und dem international gültigen Atomgewicht des Cadmiums ergebenden Differenz wurde eine Neubestimmung dieser Konstante durch die Analyse des Cadmiumchlorids und -bromids ausgeführt.
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    Zeitschrift für anorganische Chemie 227 (1936), S. 425-428 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurde das Kupfersalz der Aminomethansulfosäure dargestellt, das auf Grund seiner Farbe als inneres Komplexsalz entsprechend dem Kupferglykolate betrachtet werden kann.
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