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  • crystal structure  (27)
  • Biochemistry and Biotechnology  (7)
  • Immunohistochemistry  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Über ein Oxidchlorid des Calciums: Ca4OCl6 (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 596 (1991), S. 89-92 
    Details
    ISSN: 0044-2313
    Keywords: Calcium oxychloride ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: An Oxychloride of Calcium: Ca4OCl6Ca4OCl6 (hexagonal, P63mc, Z = 2), a = 905.8(3), c = 686.3(4) pm, (R = 0.031) crystallizes as colourless needles from reducing melts (CaCl2, Ca) that contain small amounts of „oxygen“. It contains „isolated“ tetrahedral units [Ca4O] and is isotypic with e.g., Ba4OCl6, Yb4OCl6 and K6HgS4. Ca4OCl6 does not form in the dehydration process of, for example, CaCl2 · 6 H2O.
    Notes: Ca4OCl6 (hexagonal, P63mc, Z = 2, a = 905.8(3)); c = 686.3(4) pm, (R = 0,031) kristallisiert in Form farbloser Nadeln aus „reduzierenden Schmelzen“ (CaCl2, Ca), die wenig „Sauerstoff“ enthalten. Es enthält „isolierte“ tetraedrische [Ca4O]-Einheiten und ist isotyp mit z. B. Ba4OCl6, Yb4OCl6 oder K6HgS4. Ca4OCl6 entsteht nicht beim Entwässern von z. B. CaCl2 · 6 H2O.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19915960112
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  • 2
    Electronic Resource
    Electronic Resource
    Sinonasal non-Hodgkin's lymphomas and Wegener's granulomatosis: A clinicopathological study (1991)
    Springer
    Virchows Archiv 418 (1991), S. 235-240 
    Details
    ISSN: 1432-2307
    Keywords: Non-Hodgkin's lymphoma ; Wegener's granulomatosis ; Immunohistochemistry ; Nasal cavity ; Paranasal sinuses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Reports of sinonasal non-Hodgkin's lymphomas, analysed with monoclonal antibodies, are scarce, and differentiation of these lymphomas from Wegener's granulomatosis can be difficult. In this study, we investigated histopathologically and immunohistologically 20 cases of non-Hodgkin's lymphoma, primary in the sinonasal region, and sinonasal biopsies from 11 patients with Wegener's granulomatosis. All T-cell lymphomas (n=7) and plasmacytomas (n=4) were stage I at clinical presentation, while all B-cell lymphomas (n=9) presented at higher stages. T-cell lymphomas tended to be more frequent in the nasal cavity and paranasal sinuses; B-cell lymphomas more often presented in the nasopharynx. Remarkably, 1 B-cell lymphoma expressed MT1, and 1 T-cell lymphoma expressed L26 (CD 20). The follow-up of 2 patients with a clinical diagnosis of Wegener's granulomatosis was suggestive of non-Hodgkin's lymphoma. Retrospective immunohistochemical analysis revealed that the original histological diagnosis of non-specific inflammation had to be changed to T-cell lymphoma, pleomorphic small cell type. We conclude that a biopsy from the sinonasal region with a dense inflammatory infiltrate, consisting predominantly of Tlymphocytes, renders a diagnosis of Wegener's granulomatosis unlikely and is at least suspicious of T-cell lymphoma. Immunohistochemical analysis is warranted for this type of biopsy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01606061
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  • 3
    Electronic Resource
    Electronic Resource
    Epithelioid sarcoma mimicking angiosarcoma: The value of immunohistochemistry in the differential diagnosis (1991)
    Springer
    Virchows Archiv 418 (1991), S. 271-278 
    Details
    ISSN: 1432-2307
    Keywords: Epithelioid sarcoma ; Soft tissue sarcoma ; Immunohistochemistry ; Marker co-expression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Epithelioid sarcoma (ES) is a rare malignant tumour of young adults, usually presenting as a skin ulcer or subcutaneous nodule in the distal portion of the upper limb. Multiple recurrences and late metastases are typical, leading to fatality in a third to one-half of all cases. The slow evolution of the tumour is one reason for its delayed recognition. The other is its frequent histological misinterpretation, in particular, as a peculiar granulomatous reaction. In our case, the primary tumour presented a variant morphological pattern so closely mimicking a cavernous angiosarcoma as to mislead several reputable opinions. Later recurrences and metastases were typical of ES, while a focal angiomatoid pattern was maintained. The morphology and immunoreactivity to a wide spectrum of tumour markers is compared with that of six file cases of classical ES. Retrospectively, all neoplastic lesions in our patient were ES. In young adults, lesions of the upper extremity, even when angiomatoid or haemorrhagic, should raise a suspicion of ES. Once epithelioid sarcoma is suspected, the differential diagnosis can be elucidated on immunohistochemical grounds. Early diagnosis provides the best opportunity for radical surgery at a stage when the tumour has not spread locally or disseminated systemically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01606067
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  • 4
    Electronic Resource
    Electronic Resource
    Immunohistological and immunoelectron microscopic identification of TNFα in normal human and murine epidermis (1992)
    Springer
    Archives of dermatological research 284 (1992), S. 154-158 
    Details
    ISSN: 1432-069X
    Keywords: TNFα ; Immunohistochemistry ; Immunoelectron microscopy ; Epidermis ; Sebaceous glands
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The presence, distribution and cellular localization of tumour necrosis factor-alpha (TNFα) were investigated in normal human and murine epidermis using immunohistological and immunoelectron microscopic methods with monoclonal and polyclonal antibodies. The immunostaining revealed an intercellular plasma membrane and cytoplasmic labelling of the epidermal keratinocytes, but no labelling of Langerhans cells, melanocytes and Merkel cells. Large amounts of TNFα were regularly found in the sebaceous glands. These findings demonstrate that epidermal keratinocytes and especially sebocytes produce and release TNFα and that this keratinocytederived cytokine may be important for the structural and functional homeostasis of normal epidermis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00372709
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  • 5
    Electronic Resource
    Electronic Resource
    Morphology of neurons in the white matter of the adult human neocortex (1992)
    Springer
    Experimental brain research 88 (1992), S. 204-212 
    Details
    ISSN: 1432-1106
    Keywords: Cerebral cortex of man ; Morphology of white matter neurons ; Subplate cells ; Golgi method ; Immunohistochemistry ; Human
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Neurons in the human cerebral cortical white matter below motor, visual, auditory and prefrontal orbital areas have been studied with the Golgi method, immunohistochemistry and diaphorase histochemistry. The majority of white matter neurons are pyramidal cells displaying the typical polarized, spiny dendritic system. The morphological variety includes stellate forms as well as bipolar pyramidal cells, and the expression of a certain morphological phenotype seems to depend on the position of the neuron. Spineless nonpyramidal neurons with multipolar to bitufted dendritic fields constitute less than 10% of the nuerons stained for microtubule associated protein (MAP-2). Only 3% of the MAP-2 immunoreactive neurons display nicotine adenine dinucleotide-diaphorase activity. The white matter pyramidal neurons are arranged in radial rows continuous with the columns of layer VI neurons. Neuron density is highest below layer VI, and decreases with increasing distance from the gray matter. White matter neurons are especially abundant below the primary motor cortex, and are least frequent below the visual cortex area 17. In contrast to other mammalian species, the white matter neurons in man are not only present during development, but persist throughout life.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02259143
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  • 6
    Electronic Resource
    Electronic Resource
    Incapability of Gluconobacter oxydans to produce tartaric acid (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 40 (1992), S. 183-186 
    Details
    ISSN: 0006-3592
    Keywords: Gluconobacter oxydans ; 5-ketogluconic acid ; tartatic acid ; vanadate ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The dependence of tartaric acid production by Gluconobacter oxydans ssp. oxydans ATCC 19357 and G. oxydans ssp. suboxydans ATCC 621 on vanadate was investigated. It was found with both organisms that trataric acid could only be produced in a medium containing vanadate (NH4VO3). A proposed intermediate of the tartaric acid metabolism in G. oxydans, 5-ketogluconic acid, was tested on its reactivity in the presence of the oxidizing catalyst vanadate. It could be shown that 5-ketogluconic acid and the catalyst vanadate, but not the activity of G. oxydans, were responsible for the formation of tartaric acid. G. oxydans was not able to produce tartaric acid by itself. The stereochemical identity of the formed tartaric acid could be identified as the L-(+)-type. Oxalic acid was formed from 5-ketogluconic acid with vanadate in the absence and in the presence of G. oxydans. The ratio of oxalic acid to tartaric acid was 1:1.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260400126
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  • 7
    Electronic Resource
    Electronic Resource
    Chemostat cultivation of Candida blankii on sugar cane bagasse hemicellulose hydrolysate (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 40 (1992), S. 353-358 
    Details
    ISSN: 0006-3592
    Keywords: Bagasse hemicellulose hydrolysate ; chemostat ; Candida blankii ; D-xylose ; single cell protein ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A Candida blankii yeast isolate was grown in sugar cane bagasse hemicellulose hydrolysate at 38°C in carbon-limited chemostat culture. The pretreatment of the acid hydrolysate prior to microbial cultivation consisted of partial neutralization with ammonia and sodium hydroxide, plus the addition of phosphorus, which was the only other growth-limiting nutrient apart from nitrogen. The cell yield coefficient on nitrogen was 16.78. The critical dilution rate was higher (0.35 h-1) in diluted hydrolysate than in undiluted hydrolysate (0.21 h-1). In undiluted hydrolysate at a dilution rate of 0.1 h-1 and pH 4, where aseptic procedures proved unnecessary, the cell and protein yield coefficients were 0.53 and 0.26, respectively, and no residual carbon substrates (D-xylose, L-arabinose, D-glucose, and acetic acid) were detected. The cell yield on oxygen increased linearly as a function of dilution rate. The cellular content of protein, carbohydrate, and RNA also increased with an increase in dilution rate, whereas the DNA content decreased slightly. C. blankii has considerable potential for the production of single cell protein from hemicellulose hydrolysate, because of its ability to utilize all of the major carbon substrates in the hydrolysate at a low pH and at a relatively high temperature with a high protein yield. © 1992 John Wiley & Sons, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260400304
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  • 8
    Electronic Resource
    Electronic Resource
    Enzymatic resolution of racemic amines in a continuous reactor in organic solvents (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 40 (1992), S. 760-767 
    Details
    ISSN: 0006-3592
    Keywords: (R)-1-(1-naphthyl)ethylamine ; (R)-1-aminoindan ; subtilisin ; organic solvent ; stereoselective aminolysis ; immobilized enzyme ; continuous process ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: An enzymatic process has been developed for the continuous production of the pharmaceutically important intermediate (R)-1-aminoindan and of the chiral resolving agent (R)-1-(1-naphthyl)ethylamine. The process consists of the subtilisin catalyzed stereoselective aminolysis of the racemic primary amine with an active ester in organic solvent. The competing nonenzymatic reaction has been suppressed by appropriate choice of solvent and reactant's concentration and by minimizing the time of contact between the amine and the active ester. Subtilisin was immobilized on glass beads and the reaction carried out in a continuous-flow column bioreactor. By using a 450-mL column bioreactor containing 5.7 g of subtilisin immobilized on 570 g of glass beads, 1.6 kg of racemic 1-(1-naphthyl)ethylamine was resolved after 320 h of continuous operation with only a slight loss of the enzymatic activity. During the whole process, the optical purity of the chiral amine eluting from the column was higher than 90%. A facile procedure was developed for separating the unreacted (R)-amine from the (S)-amide and for the recycling of the solvent 3-methyl-3-pentanol and the active ester 2,2,2-trifluoroethyl butyrate. © 1992 John Wiley & Sons, Inc.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260400703
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  • 9
    Electronic Resource
    Electronic Resource
    Synthese und Kristallstrukturen der Alkali-Tetraiodoindate(III), Alnl4 (A = Li, K, Rb, Cs)Professor Klaus Brodersen zum 65. Geburtstage am 12. August 1991 gewidmet (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 602 (1991), S. 31-37 
    Details
    ISSN: 0044-2313
    Keywords: Alkali-iodoindates(III) ; indium ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structures of the Alkali-tetraiodoindates(III), AInI4 (A = Li, K, Rb, Cs)Single crystals of the yellow alkaliiodoindates(III), AInI4 (A = Li, K, Rb, Cs), are obtained from mixtures of the binary components by slow cooling of the melts. LiInI4 is isotypic with LiAlCl4: monoclinic, P21/c, Z = 4; a = 838.9(4); b = 751.2(3); c = 1526,7(8) pm; β = 92.67(4)°. KInI4 belongs to the ATIX4 type of structure (A = NH4, K, Rb; X = Br, I): cubic, F4 3c, Z = 24; a = 1990.8(1) pm. RbInI4 crystallizes with the β-GaBr2 type: trigonal, R3c, Z = 18; a = 2452.6(6); c = 978.6(4) pm. CsInI4 is isostructural with CsTII4: monoclinic, P21/c, Z = 4; a = 738.4(1); b = 1875.7(3); c = 853.6(2) pm; β = 105.75(2)°. In all structures almost regular tetrahedral polyhedra [InI4]- occur. The coordination numbers of the alkali cations cover the wide range from 6 (Li+) via 9 (Rb+) and 11 (Cs+) to 12 (K1+).
    Notes: Einkristalle der gelben Iodoindate(III) der Alkalimetalle, AInI4 (A = Li, K, Rb, Cs), erhält man aus Gemengen der binären Komponenten durch langsames Abkühlen der Schmelzen. LiInI4 ist isotyp mit LiAlCl4: monoklin, P21/c, Z = 4; a = 838,9(4); b = 751,2(3); c = 1526,7(8) pm; β = 92,67(4)°. KInI4 gehört zum ATIX4-Typ (A= NH4, K, Rb; X= Br, I): kubisch, F4 3c, Z = 24; a = 1990,8(1) pm. RbInI4 kristallisiert im β-Ga[GaBr4]-Typ: trigonal, R3c, Z = 18; a = 2452,6(6); c = 978,6(4) pm. CsInI4 ist isotyp mit CsTII4: monoklin, P21/c, Z = 4; a = 738,4(1); b = 1875,7(3); c = 853,6(2) pm; β = 105,75(2)°. Stets liegen annähernd tetraedrische Baugruppen [InI4]- vor. Die Koordinationszahlen der Alkali-Kationen überstreichen das Spektrum von 6 (Li+) über 9 Rb+, 11 (Cs+) bis 12 (K1+).
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19916020104
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  • 10
    Electronic Resource
    Electronic Resource
    Synthese und Kristallstruktur von Hydronium-tris-ethylendiamin-cobalt(rhodium)-μ-trichloro-nonachlorotrirhenat(II)-chlorid, H3O[MEn3][Re3Cl12]Cl (M=Co, Rh) (1992)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 607 (1992), S. 91-95 
    Details
    ISSN: 0044-2313
    Keywords: Rhenium complexes ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of Hydronium-tris-ethylenediamine-cobalt(rhodium)-μ-trichloro-nonachlorotrirhenate(III)-chloride, H3O[MEn3][Re3Cl12]Cl (M=Co, Rh)The chlorides H3O[MEn3][Re3Cl12]CI (M = Co, 1; Rh, 2) crystallize from hydrochloric acid solutions of ReCl3 and MEn3 · 3H2O as deep red hexagonal columns. They are isotypic and crystallize with the hexagonal system (P6, Z = 1; 1: a = 1010.87(3); c = 794.30(4) pm, R = 0.023, Rw = 0.016; 2: a = 1018.58(3); c = 794.74(4) pm, R = 0.026, Rw = 0.018). The anions [Re3Cl12]3- are connected via H3O+ cation (C.N. 3). The large channels that run in the [001] direction contain, alternatively, the cations [MEn3]3+ and the lonesome Cl--anions
    Notes: Die Chloride H3O[MEn3][Re3CI12]CI(M = Co, 1; Rh, 2) Kristallisieren in Form tiefroter hexagonaler Säulen aus salzsauren Lösungen von ReCI3 und MEn3CI3 · 3H2O aus. Sie sind isotyp und Kristallisieren im hexagonalen System (P6, Z = 1; 1: a = 1010,87(3); C = 794,30(4)pm, Rw = 0,016; : a = 1018,58(3); c = 794,74(4)pm, R = 0,026, Rw = 0,018). Die Anionen [ Re3Cl12]3- werden über H3O+ (C.N. 3) verknüpft; in die entstehenden Kanäle sind längs [001] abwechselnd die Kationen [MEn3]3+ und die einsamen Cl--Ionen eingelagert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19926070115
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