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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature biotechnology 24 (2006), S. 572-576 
    ISSN: 1546-1696
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: [Auszug] Transcriptional silencing, one of the major impediments to gene therapy in humans, is often accompanied by replication during late S-phase. We report that transcriptional silencing and late replication were prevented by DNA sequences that can initiate DNA replication (replicators). When replicators ...
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0649
    Keywords: 42.65.Cq ; 82.20.Pm ; 82.40.Tc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The time resolved polarized CARS technique has been used to detect Cl atoms produced by photolysis of ICl in the presence and absence of O2. A population inversion was observed between the ground state electronic levels Cl(2 P 1/2) and Cl(2 P 3/2). The rate constant for Cl(2 P 1/2) decay (quenching + reaction) in ICl was determined to be (3.2±0.2)×10−13 cm3/molecule×s; the rate constant for Cl(2 P 3/2) reaction with ICl was determined to be (7.8±0.5)×10−12 cm3/molecule×s; and the rate constant for Cl(2 P 1/2) quenching by O2 was determined to be (1.9±0.2)×10−13 cm3/molecule×s.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Wireless personal communications 13 (2000), S. 79-96 
    ISSN: 1572-834X
    Keywords: multiple access protocols ; multimedia wireless networks ; performance evaluation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract This paper proposes a new medium access protocol (MAC) protocol for futurewireless multimedia personal communication systems, denoted hybrid andadaptive multiple access control (HAMAC) protocol. The HAMAC protocolintegrates fixed assignment TDMA protocol, reservation-based protocols, andcontention-based protocols into a single wireless network so as tosimultaneously and efficiently support various classes of traffic such asconstant-bit-rate (CBR), variable-bit-rate (VBR), and available-bit-rate (ABR)traffic. In particular, the HAMAC protocol uses a novel preservationslot technique to overcome the packet contention overhead in packetreservation multiple access (PRMA) like protocols, while keeping mostisochronous service features of TDMA protocols to serve voice and CBR trafficstreams. A preservation slot is a very short slot which is used torepresent a CBR connection when the traffic in the CBR connection is in asilent period in which there is no meaningful data to transmit. Due to thevery short length of the preservation slot, it only takes minimalportion of the bandwidth pre-allocated to the CBR connection, so that theremaining bandwidth can be freed for other connections to use. When the CBRsource becomes active again, the preservation slot is replaced bynormal data slots without any reservation operation, extra delay, orsignificant bandwidth loss. Consequently, the guaranteed service andsimplified signaling features of TDMA protocols, together with the adaptivebandwidth allocation features of PRMA-like protocols, are both realized in theHAMAC protocol. We have analyzed the performance of the HAMAC protocol usingextensive simulations. The results show that the HAMAC protocol can achievevery low loss rates for various multimedia traffic with stringent quality ofservice (QoS) requirements and outperforms state-of-the-art PRMA-likeprotocols. As a result, the HAMAC protocol appears to be a good candidate forfuture generation multimedia personal communication systems.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-0878
    Keywords: PGP 9.5 (human protein gene product 9.5) ; Skin ; Immunohistochemistry ; Nerve fibres ; Dendritic cells ; Merkel cells ; Human
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Sections of human skin were processed according to the indirect immunofluorescence technique with a rabbit antiserum against human protein gene product 9.5 (PGP 9.5). Immunoreactivity was detected in intraepidermal and dermal nerve fibres and cells. The intraepidermal nerves were varicose or smooth with different diameters, running as single processes or branched, straight or bent, projecting in various directions and terminating in the stratum basale, spinosum or granulosum. The density of the intraepidermal nerves varied between the different skin areas investigated. PGP 9.5-containing axons of the lower dermis were found in large bundles. They separated into smaller axon bundles within the upper dermis, entering this portion of the skin perpendicular to the surface. Then they branched into fibres mainly arranged parallel to the epidermal-dermal junctional zone. However, the fibres en route to the epidermis traversed the upper dermis more or less perpendicularly. Furthermore, immunoreactive dermal nerve fibres were found in the Meissner corpuscles, the arrector pili muscles, hair follicles, around the eccrine and apocrine sweat glands and around certain blood vessels. Such fibres were also observed around most subcutaneous blood vessels, sometimes heavily innervating these structures. Numerous weakly-to-strongly PGP 9.5-immunoreactive cells were found both in the epidermis and in the dermis.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 44 (1992), S. 1365-1370 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: In this article, a polyimide precursor was synthesized from oxydianiline and a diacid chloride. This diacid chloride was prepared by the reaction of thionyl chloride with a diacid, which resulted from the reaction of pyromellitic dianhydride with cinnamyl alcohol in N-methylpyrrolidone (NMP). The photoresist, made from the above polyimide precursor, was spincoated onto silicon wafers, prebaked, and then exposed to UV light with a high pressure Hg lamp. The pattern generation process was also investigated. The appropriate conditions of the photolithographic procedures, involving photoresist compounding, spin coating, prebaking, exposure, development, rinse, postbaking, etc., were determined. The experimental results show that the photoresist exhibited excellent thermal stability and adequate photosensitivity.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 55 (1995), S. 1111-1116 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A photosensitive polysiloxaneimide precursor was synthesized from oxydianiline, bis(p-aminophenoxy)dimethylsilane, and a diacid chloride. This diacid chloride was prepared by the reaction of thionyl chloride with a diacid, which resulted from the reaction of pyromellitic dianhydride with hydroxyethylacrylate in N-methylpyrrolidone (NMP). The adhesion properties between polyimide and substrates such as SiO2 wafer were improved with introduction of siloxane moiety into the polyimide chain. The dielectric constant decreased with increasing siloxane moiety content. The photocrosslinking reaction results show that an 88-90% gel fraction was reached under the irradiation of a high-pressure mercury lamp. © 1995 John Wiley & Sons, Inc.
    Additional Material: 5 Ill.
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  • 7
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    PANGAEA
    In:  Supplement to: Tian, Chao; Wang, Lixin (2019): Stable isotope variations of daily precipitation from 2014–2018 in the central United States. Scientific Data, 6, 190018, https://doi.org/10.1038/sdata.2019.18
    Publication Date: 2023-01-13
    Description: Stable isotopes of hydrogen and oxygen (δ2H, δ18O and δ17O) serve as powerful tracers in hydrological investigations. To our knowledge, daily precipitation isotope record especially 17O-excess is rare in the mid-latitudes. To fill such knowledge gap, daily precipitation samples (n = 446) were collected from June 2014 to May 2018 in Indianapolis, Indiana, U.S. A Triple Water Vapor Isotope Analyzer (T-WVIA) based on Off-Axis Integrated Cavity Output Spectroscopy (OA-ICOS) technique was used to concurrently measure precipitation isotopic variations (δ2H, δ18O and δ17O). Meanwhile, 17O-excess and d-excess as second-order isotopic variables were calculated to provide additional information on precipitation formation and transport mechanisms. This study presents a four-year daily precipitation isotope dataset for mid-latitudes, and makes it available to researchers around the world who may use it as a reference for site comparisons and for global hydrological modeling validation.
    Keywords: Calculated; DATE/TIME; Deuterium excess; Indianapolis_precip_2014-2018; Oxygen-17 excess; Precipitation; Triple water vapor Isotope analyzer (T-WVIA) based on off-axis integrated cavity output spectroscopy (OA-ICOS); Water sample, precipitation; WSP; δ17O; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 2676 data points
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  • 8
    Publication Date: 2023-06-08
    Description: As a supplementary or sometimes the only water source in dry regions, dew plays a critical role in the survival of organisms in such environments. The new hydrological tracer 17O-excess, with almost sole dependence on relative humidity, provides a new way to distinguish the evaporation processes and reconstruct the paleoclimate. Up to now, there is no daily dew isotope record on δ2H, δ18O, δ17O, d-excess, and 17O-excess. To fill this gap, here we collected daily dew (n=114) between July 2014 and April 2018 from three distinct climatic regions (i.e., Gobabeb-Namib Research Institute in the central Namib Desert with desert climate, Nice in France with Mediterranean climate, and Indianapolis in the central United States with humid continental climate). The isotopic composition (δ2H, δ18O, and δ17O) of dew was simultaneously analyzed using a Triple Water Vapor Isotope Analyzer (T-WVIA) based on Off-Axis Integrated Cavity Output Spectroscopy (OA-ICOS) technique, and then d-excess and 17O-excess were calculated. The latitude, longitude, and elevation as well as three meteorological factors including temperature, relative humidity (RH), and vapour-pressure deficit (VPD) of the three collection sites were also provided here. This report presents daily dew isotope dataset under three different climatic regions. It is useful for researchers to use it as a data reference when studying global dew dynamics and dew formation mechanisms.
    Keywords: Calculated; DATE/TIME; Deuterium excess; DewIsotope_Gobabeb; DewIsotope_Indianapolis; DewIsotope_Nice; ELEVATION; Event label; Gobabeb; Humidity, relative; Indianapolis; LATITUDE; LONGITUDE; Nice; Oxygen-17 excess; Site; Temperature, air; Triple water vapor Isotope analyzer (T-WVIA) based on off-axis integrated cavity output spectroscopy (OA-ICOS); Vapour pressure deficit; δ17O; δ18O; δ Deuterium
    Type: Dataset
    Format: text/tab-separated-values, 1020 data points
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  • 9
    Publication Date: 2024-01-27
    Description: Tap water isotopic compositions could potentially record information on local climate and water management practices. A new water isotope tracer 17O-excess becomes available in recent years providing additional information of the mechanisms of various hydrological processes. Detailed data records of tap water 17O-excess have not been reported. In this report, monthly tap water samples (n = 652) were collected from December 2014 to November 2015 from 92 sites across China. The isotopic variations (δ2H, δ18O, and δ17O) of tap water were analyzed by a Triple Water Vapor Isotope Analyzer (T-WVIA) based on Off-Axis Integrated Cavity Output Spectroscopy (OA-ICOS) technique and two second-order isotopic variables (d-excess and 17O-excess) were calculated. The geographic location information of the 92 collection sites including latitude, longitude, and elevation were also provided in this dataset. This report presents national-scale tap water isotope dataset at monthly time scale. Researchers and water resource managers who focus on the tap water issues could use them to probe the water source and water management strategies at large spatial scales.
    Keywords: Aksu; Aksu_tap_water; Anyang; Anyang_tap_water; Baiyin; Baiyin_tap_water; Baoding; Baoding_tap_water; Baoshan; Baoshan_tap_water; Baotou; Baotou_tap_water; Bijie; Bijie_tap_water; Bose; Bose_tap_water; Calculated; Cangzhou; Cangzhou_tap_water; Changchun; Changchun_tap_water; Changsha; Changsha_tap_water; Chengde; Chengde_tap_water; Chengdu; Chengdu_tap_water; Chifeng; Chifeng_tap_water; Chongqing; Chongqing_tap_water; Dalian; Dalian_tap_water; Dandong; Dandong_tap_water; DATE/TIME; Delingha; Delingha_tap_water; Deuterium excess; Dingxi; Dingxi_tap_water; Dongying; Dongying_tap_water; ELEVATION; Enshi; Enshi_tap_water; Event label; Fuzhou; Fuzhou_tap_water; Gannan; Gannan_tap_water; Golmud; Golmud_tap_water; Guangzhou; Guangzhou_tap_water; Guilin; Guilin_tap_water; Guiyang; Guiyang_tap_water; Haikou; Haikou_tap_water; Hangzhou; Hangzhou_tap_water; Hanzhong; Hanzhong_tap_water; Harbin; Harbin_tap_water; Hefei; Hefei_tap_water; Heihe; Heihe_tap_water; Hengshui; Hengshui_tap_water; Hohhot; Hohhot_tap_water; Huaihua; Huaihua_tap_water; Jinzhong; Jinzhong_tap_water; Jiuquan; Jiuquan_tap_water; Kaifeng; Kaifeng_tap_water; Karamay; Karamay_tap_water; Kashgar; Kashgar_tap_water; Korla; Korla_tap_water; Kunming; Kunming_tap_water; Lanzhou; Lanzhou_tap_water; LATITUDE; Lhasa; Lhasa_tap_water; Linhe; Linhe_tap_water; Lishui; Lishui_tap_water; Liuzhou; Liuzhou_tap_water; Location; LONGITUDE; Longnan; Longnan_tap_water; Longyan; Longyan_tap_water; Maanshan; Maanshan_tap_water; Nanning; Nanning_tap_water; Nantong; Nantong_tap_water; Nyingchi; Nyingchi_tap_water; Oxygen-17 excess; Panzhihua; Panzhihua_tap_water; Pingliang; Pingliang_tap_water; Qujing; Qujing_tap_water; Quzhou; Quzhou_tap_water; Shanghai; Shanghai_tap_water; Shaoguan; Shaoguan_tap_water; Shaoxing; Shaoxing_tap_water; Shenyang; Shenyang_tap_water; Shenzhen; Shenzhen_tap_water; Shijiazhuang; Shijiazhuang_tap_water; Simao; Simao_tap_water; Suzhou; Suzhou_tap_water; Taiyuan; Taiyuan_tap_water; Tangshan; Tangshan_tap_water; Tianjin; Tianjin_tap_water; Tianshui; Tianshui_tap_water; Tongliao; Tongliao_tap_water; Tongren; Tongren_tap_water; Triple water vapor Isotope analyzer (T-WVIA) based on off-axis integrated cavity output spectroscopy (OA-ICOS); Ulanhot; Ulanhot_tap_water; Urumqi; Urumqi_tap_water; Water sample; Weifang; Weifang_tap_water; Wenshan; Wenshan_tap_water; WS; Wuhan; Wuhan_tap_water; Xiamen; Xiamen_tap_water; Xiangtan; Xiangtan_tap_water; Xianyang; Xianyang_tap_water; Xichang; Xichang_tap_water; Xilinhot; Xilinhot_tap_water; Xining; Xining_tap_water; Xuzhou; Xuzhou_tap_water; Yancheng; Yancheng_tap_water; Yantai; Yantai_tap_water; Yinchuan; Yinchuan_tap_water; Yueyang; Yueyang_tap_water; Yulin; Yulin_tap_water; Zaozhuang; Zaozhuang_tap_water; Zhanjiang; Zhanjiang_tap_water; Zhengzhou; Zhengzhou_tap_water; δ17O, water; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 3912 data points
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  • 10
    Publication Date: 2019-11-26
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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