检索结果-内蒙古大学图书馆

THE EffECT Of CAT REMOVAL ON ALLERGEN CONTENT IN HOUSEHOLD-DUST SAMPLES

JOURNAL Of ALLERGY AND CLINICAL IMMUNOLOGY 1989年第4期83卷 730-734页

作者： WOOD, RA CHAPMAN, MD ADKINSON, Nf EGGLESTON, PA JOHNS HOPKINS UNIV SCH MED DEPT PEDIAT DIV IMMUNOL BALTIMORE MD 21205 USA JOHNS HOPKINS UNIV SCH MED DEPT INTERNAL MED DIV CLIN IMMUNOL BALTIMORE MD 21205 USA UNIV VIRGINIA DEPT MED DEPT ALLERGY & CLIN IMMUNOL CHARLOTTESVILLE VA 22903 USA

To evaluate the effect of cat removal on cat-allergen content in the home, serial house dust samples were collected from 15 homes during a 9- to 43-week period after cat removal. Samples were obtained with a hand-held vacuum cleaner, and allergen content was quantitated by a radioimmunoassay specific for the major cat allergen. fe1 dI. Baseline fe1 d I content ranged from 7.8 food and Drug Administration units per gram of dust to 436.7 U/gm (median 61.2 U/gm), consistent with levels found in homes with a pet cat. fe1 d I levels declined gradually in most homes, and by 20 to 24 weeks after cat removal, eight of 15 reached levels consistent with levels found in control homes without cats. In two of those homes, allergen levels fell much more rapidly after aggressive environmental control measures were undertaken. In the other seven homes, however, the decline occurred at a much slower rate, with three homes demonstrating persistent elevations in fe1 d I content for 20 or more weeks. These data demonstrate that the task of allergen elimination from an indoor environment is extremely difficult, even when the source of a specific allergen can be identified and removed.

关键词： fel d I felis domesticus allergen I RIA Radioimmunoassay Mab Monoclonal antibody Der p I Dermatophagoides pteronyssinus allergen I Der f I Dermatophagoides farinae allergen I CV Coefficient of variation

来源：评论

学校读者我要写书评

暂无评论

fRUCTOSYLTRANSfERASE AND INVERTASE ACTIVITIES IN LEAf EXTRACTS Of 6 TEMPERATE GRASSES GROWN IN WARM AND COOL TEMPERATURES

引用

JOURNAL Of PLANT PHYSIOLOGY 1989年第3期135卷 301-305页

作者： CHATTERTON, NJ THORNLEY, WR HARRISON, PA BENNETT, JH USDA-ARS-Forage and Range Research Utah State University Logan Utah 84322-6300 Plant Physiologists USDA-Agricultural Research Service Utah State University Logan UT 84322-6300

Sucrose-sucrose 1-fructosyltransferase (SST) and invertase activities were measured at 10, 25 and ***. C in enzyme preparations from leaves of six grass species grown at 25/***. C or 10/***. C. The synthesis of kestoses by SST and the hydrolysis of sucrose by invertase were monitored by anion exchange chromatography. In vitro SST activities in extracts of plants grown at cool temperatures were much higher than in extracts from warm grown plants in all species except Phleum pratense L. 1-Kestose was the dominant trisacharide synthesized in all species except Dactylis glomerata L. in which 6-kestose was usually dominant. Extracts of Secale montanum Guss. also synthesized significant amounts of 6-kestose. Neokestose was not synthesized in vitro by extracts of any of the six species. Some fructan synthesis in D. glomerata L. and P. pratense L. may occur via SST in addition to the proposed mechanism of phlein sucrase. The high temperature optima for .beta.-fructofuronosidase activity and the low temperature optima for fructosyltransferase activity is consistent with the hypothesis that invertase does not significantly contribute to kestose synthesis under normal growth conditions. Both plant growth temperature and in vitro enzyme incubation temperature appear to alter the proportions of 1-kestose and 6-kestose produced by enzyme extracts of grasses. A better understanding of fructan metabolism will facilitate selection for improved plant growth under cool temperatures. [The 3 other species were festuca arundinacea, Elymus tsukushiensis and a hybrid, Agropyron cristatum .times. A. deserturum].

关键词： fructosyltransferase gramineae temperate grasses fructan invertase kestoses SST sucrose-sucrose 1-fructosyltransferase Inv Invertase 1 f -fT 1 f -fructosyltransferase 6 G -fT 6G-fructosyltransferase DP Degree of polymerization 1-kestose αD-glucose 1-2, βD-fructose 1-2, βD-fructose 6-kestose αD-glucose 1-2, βD-fructose 6-2, βD-fructose neokestose βD-fructose 2-6, αD-glucose 1-2, βD-fructose

来源：评论

学校读者我要写书评

暂无评论

L47型风机逆流式冷却塔通用图(二版、f=80M~2)送审稿审查完毕

引用

净水技术 1989年第4期 46-46页

作者：李关祥项成林化工部给排水设计技术中心站

化工部给排水设计技术中心站,于一九八九年十一月九日至十二日在江苏省宜兴市召开会议,对天津市化工设计院主编的L47型风机逆流式冷却塔通风图(二版、f=80M~2)送审稿进行了审查,该通用图设计是在CD80B1—83L47型风机逆流式冷却塔通用图(... 详细信息

化工部给排水设计技术中心站,于一九八九年十一月九日至十二日在江苏省宜兴市召开会议,对天津市化工设计院主编的L47型风机逆流式冷却塔通风图(二版、f=80M~2)送审稿进行了审查,该通用图设计是在CD80B1—83L47型风机逆流式冷却塔通用图(f=70M~2)基础上,加以改进,水量波动范围为480～1200吨/时,推荐塑料重波填料和改型水泥格网填料两种,MRT动能回

关键词：逆流式冷却塔通用图 f=80M~2 f L47 风机发动机

来源：评论

学校读者我要写书评

暂无评论

DIffERENCES IN MEMBRANE-PROPERTIES BETWEEN UNfERTILIZED AND fERTILIZED SINGLE-RABBIT OOCYTES DEMONSTRATED BY ELECTRO-ROTATION - COMPARISON WITH CELLS fROM EARLY EMBRYOS

引用

BIOCHIMICA ET BIOPHYSICA ACTA 1989年第1期979卷 142-146页

作者： ARNOLD, WM SCHMUTZLER, RK ALHASANI, S KREBS, D ZIMMERMANN, U UNIV BONN FRAUENKLIN D-5300 BONN GERMANY

The apparent membrane capacity of tubular rabbit oocytes increases from 1.7-2.0 .mu.f/cm2 before fertilisation to 3.7-4.0 .mu.f/cm2 after fertilisation. The membrane conductivity measured on single cells was also increased by fertilisation from less than 1 mS/cm2 to 14 mS/cm2. Cells obtained from 2-, 4- or 8-cell embryos exhibited intermediate values of membrane capacity (2.3-2.8 .mu.f/cm2) and conductivity (5-22 mS/cm2). The values quoted are those effective between 1 and 10 kHz, the frequency of the rotating field used. The large apparent capacities are probably due to the presence of structures such as microvilli which cause the actual membrane area to exceed the smooth sphere area. It must be assumed that these structures change in form or number on fertilisation, and that they persist in embryos, at least up to the 8-cell stage. No difference was apparent between cells fertilised in vitro or in vivo. Comparison of the above zona-free data with measurements on zona-complete oocytes indicate how fertilised and unfertilised rabbit eggs may be distinguished from one another, even in the presence of the zona pellucida.

关键词： In vitro fertilization fertilization Single cell rotation Microvilli Membrane capacity Membrane resistivity Electrorotation (Zona pellucida) BSA bovine serum albumen f c ‘characteristic frequency’ of a rotation peak (that field frequency that gives fastest rotation)

来源：评论

学校读者我要写书评

暂无评论

IDENTIfICATION, PARTIAL-PURIfICATION AND CHARACTERIZATION Of HIGH-MOLECULAR-WEIGHT GELATIN-DEGRADING METALLOPROTEINASES PRODUCED BY A RAT MAMMARY-CARCINOMA CELL-LINE

引用

BIOCHIMICA ET BIOPHYSICA ACTA 1989年第1期993卷 42-47页

作者： NETHERY, A OGRADY, RL UNIV TECHNOL SYDNEY DEPT CELLULAR PATHOL WESTBOURNE AVE GORE HILL NSW 2065 AUSTRALIA UNIV TECHNOL SYDNEY DEPT PATHOL GORE HILL NSW 2065 AUSTRALIA

BC1 rat mammary carcinoma cells were found to secrete a unique profile of metalloproteinases, distinguished by two gelatin-degrading metalloproteinases of Mr > 220 .cntdot. 103 and Mr .mchgt. 220 .cntdot. 103. These enzymes were each partially purified by gel-filtration chromatography, an inhibitor studies showed them to be metalloproteinases. Under conditions where denatured collagen types I, II, and V were completely degraded, native collagen types I, II, IV and V, fibronectin, fibrinogen, C1q, casein, and denatured transferrin were not degraded significantly by these enzymes. The relationship of these enzymes to other extracellular matrix-degrading metallproteinases and their possible significance in tumour invasion and metastasis is discussed.

关键词： Metalloproteinase Enzyme purification Mammary carcinoma Carcinoma (Rat) APMA 4-aminophenylmercuric acetate α 2 M α 2 macroglobulin DTT dithiothreitol IAA iodoacetic acid PMSf phenylmethylsulfonyl fluoride EGTA ethylene glycol bis(β-aminoethyl ether) N,N,N ′, N ′-tetraacetic acid RCM- reduced and car☐ymethylated R f relative electrophoretic mobility SDS sodium dodecyl sulfate PAGE polyacrylamide gel electrophoresis NEM N -ethylmaleimide

来源：评论

学校读者我要写书评

暂无评论

A 5TH CHLOROPLAST-ENCODED POLYPEPTIDE IS PRESENT IN THE PHOTOSYSTEM-II REACTION CENTER COMPLEX

引用

fEBS LETTERS 1989年第2期242卷 259-262页

作者： WEBBER, AN PACKMAN, L CHAPMAN, DJ BARBER, J GRAY, JC UNIV CAMBRIDGE SCH BOTDOWNING STCAMBRIDGE CB2 3EAENGLAND UNIV CAMBRIDGE DEPT BIOCHEMCAMBRIDGE CB2 1QWENGLAND UNIV LONDON IMPERIAL COLL SCI & TECHNOL DEPT PURE & APPL BIOLLONDON SW7 2BBENGLAND

The small polypeptides present in the pea photosystem II reaction centre complex have been separated by high-resolution SDS-polyacrylamide gel electrophoresis and characterised by N-terminal amino acid sequencing. Two polypeptides are identified as the α- and β-subunits of cytochrome b 559 which are the products of the pdb E and psb f genes. A third polypeptide, of 4.5 kDA, is identified as the product of a small open reading frame in chloroplast DNA. The gene for this polypeptide , psb I, is located just downstream of the psb K gene chloroplast DNA.

关键词： Photosystem II reaction center Cytochrome b -559 Gene, psb E Gene, psb f Gene, psb I (Pea)

来源：评论

学校读者我要写书评

暂无评论

ON THE COMPUTATION Of THE AGGREGATE CLAIM DISTRIBUTION WHEN INDIVIDUAL CLAIMS ARE INVERSE GAUSSIAN

引用

INSURANCE MATHEMATICS & ECONOMICS 1989年第3期8卷 251-258页

作者： GENDRON, M CREPEAU, H UNIV LAVAL QUEBEC CITY G1K 7P4QUEBECCANADA

This paper investigates how various approximations to the distribution, f(x, t), of aggregate claims compare with exact values obtained from numerical methods when individual claims are Inverse Gaussian.

关键词： Inverse Gaussian distribution Exact value Numerical calculations Approximations to f ( x , t )

来源：评论

学校读者我要写书评

暂无评论

ELECTROLUMINESCENCE AND PHOTOLUMINESCENCE IN EU-DOPED SRS THIN-fILMS

引用

JAPANESE JOURNAL Of APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS 1989年第6期28卷 L1019-L1021页

作者： XIAN, H ZHONG, GZ TANAKA, S KOBAYASHI, H TOTTORI UNIV DEPT ELECTR TOTTORI 680 JAPAN

The electroluminescence (EL) and photoluminescence (PL) characteristics of SrS:Eu, f thin-films have been studied. It is found that valence of the Eu luminescent centers is affected by the presence of f- ions. At lower Eu concentration less than 0.3 mol%, Eu2+ centers exist, but at higher concentration over 0.6 mol%, both Eu2+ and Eu3+ centers coexist in the films. The Eu2+ centers are efficient for both EL and PL. The excitation process of Eu2+ centers is attributable to the energy transfer from the SrS lattice to Eu2+ centers. On the contrary, Eu3+ centers are efficient for EL only through the direct impact excitation by hot electrons.

关键词： Electroluminescence Excitation mechanism f Photoluminescence SrS:Eu Thin-film

来源：评论

学校读者我要写书评

暂无评论

T-CELL RECEPTOR GENE REARRANGEMENT IN B-CELL NON-HODGKINS LYMPHOMA - CORRELATION WITH METHYLATION AND EXPRESSION

引用

LEUKEMIA RESEARCH 1989年第6期13卷 473-+页

作者： LEBER, Bf AMLOT, P HOffBRAND, AV NORTON, JD ROYAL FREE HOSP SCH MED DEPT HAEMATOL POND ST LONDON NW3 2QG ENGLAND ROYAL FREE HOSP SCH MED DEPT IMMUNOL LONDON NW3 2QG ENGLAND

Two of 19 B-cell non-Hodgkin''s lymphoma (NHL) were found to have clonally rearranged T-cell receptor (TCR) beta chain genes with a germline TCR-gamma gene configuration. The inappropriate rearrangements had a similar structure to the TCR-beta rearrangements described in B-cell chronic lymphocytic leukemia. All cases analysed displayed a consistent germline transcription of TCR-beta and alpha chain genes which was independent of rearrangement. Consistent with this, all cases showed some degree of hypomethylation of the TCR-beta chain locus similar though distinguishable from the pattern seen in mature T cells, but quite different from that seen in normal mature B cells. Taken together, these data suggest that most NHL''s arise from an immature B-lymphocyte precursor at a stage of differentiation where lineage commitment is incomplete.

关键词： B-Cell non-Hodgkin's lymphoma gene methylation T-cell beta receptor gene rearrangement NHL non-Hodgkin's lymphoma CLL chronic lymphocytic leukemia CB centroblastic CC centrocytic f follicular D diffuse HG high grade Ib immunoblastic Pc plasmacytoid LC large cell LB lymphoblastic K kappa L lambda TCR T-cell receptor kb kilobase pair

来源：评论

学校读者我要写书评

暂无评论

INELASTIC ELECTRON-SCATTERING AND PION-PHOTOPRODUCTION ON C-12

引用

NUCLEAR PHYSICS A 1989年第4期501卷 751-764页

作者： TIATOR, L BENNHOLD, C NEUHAUSEN, R Institut für Kenphysik Johannes Gutenberg-Universität 6500 Mainz Fed. Rep. Germany

We present experimental data on inelastic electron scattering from 12 C leading to the 2 + state at 16.11 MeV. The E2 and C2 form factors are analysed in a conventional harmonic-oscillator shell model. Several sets of nuclear structure coefficients arc extracted by adjusting the theoretical form factors to reproduce the experimental data. One is restricted to the 1p shell only and can be used for other reactions involving this level, while another one allows for the admixture of higher configurations. The implications of the Siegert theorem are also discussed. Employing the nuclear structure input we performed calculations for the process 12 C (γ, π + ) 12 B ∗ (2 + 1; 0.95 MeV ) using a nonlocal DWIA approach. The elementary pion production operator is assumed to be given by the Blomqvist-Lyget amplitude, while the final-state interaction of the existing pion is provided by an optical potential that is in agreement with pion scattering. We compare our computations with experimental data (γ, π) at a number of different photon lab energies.

关键词： 12 C ( e, e ′) 12 C ∗ (2 + , T = 1 16.11 MeV)measured σ ( E , θ ) extracted f 2 1 , f 2 1 nuclear structure coefficients applied to 12 C(γ, π + ) 12 B∗(2 + 1 0.95MeV)

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：