bluuebunny/crossref_metadata_2025_split huggingface dataset:
Use of a titanium device in lateral sinus floor elevation: an experimental study in monkeys
Authors: Schweikert Michael , Botticelli Daniele , de Oliveira José Américo , Scala Alessandro , Salata Luiz A. , Lang Niklaus P. 
Published: April 2011

Abstract
Aim: To evaluate the effect of a space‐maintaining device fixed to the lateral wall of the maxillary sinus after the elevation of the sinus mucosa on bone filling of the sinus cavity.
Material and methods: Immediately after the elevation of the maxillary sinus Schneiderian membrane accomplished through lateral antrostomy in four monkeys, a titanium device was affixed to the lateral sinus wall protruding into the sinus cavity to maintain the mucosa elevated without the use of grafting material. The healing of the tissue around the implants was evaluated after 3 and 6 months. Ground sections were prepared and analyzed histologically.
Results: The void under the elevated sinus membrane, originally filled with the blood clot, was reduced after 3 as well as after 6 months of healing of about 56% and 40.5%, respectively. In seven out of eight cases, the devices had perforated the sinus mucosa. The formation of mineralized bone and bone marrow amounted to about 42% and 69% after 3 and 6 months, respectively. The connective tissue represented about 53% and 23% of the newly formed tissue after 3 and 6 months, respectively.
Conclusions: New bone formation was found below the devices. However, shrinkage of the newly formed tissue was observed both after 3 and 6 months of healing. Hence, the space‐maintaining function of the devices used in the present study has to be questioned.
To cite this article: Schweikert M, Botticelli D, de Oliveira JA, Scala A, Salata LA, Lang NP. Use of a titanium device in lateral sinus floor elevation: an experimental study in monkeys. Clin. Oral Impl. Res. 23, 2012; 100–105. doi: 10.1111/j.1600‐0501.2011.02200.x
Left‐to‐right distribution of periodontal disease
Authors: Darby IB , Polster A , Gan JS , Guo Q , Henein N , Heredia A , Horina H , Sanduja D , Radvar M 
Published: April 2011

To cite this article:

Int J Dent Hygiene
10, 2012; 74–79  DOI: 10.1111/j.1601‐5037.2011.00509.x  Darby IB, Polster A, Gan JS, Guo Q, Henein N, Heredia A, Horina H, Sanduja D, Radvar M. Left‐to‐right distribution of periodontal disease.Abstract:  Aim:  Symmetry is a property established in many human biological systems and it is reasonable to expect that it may also exist in the mouth. The objective of this study was to examine whether there is a similar left‐to‐right distribution in periodontal disease.Method:  Records of 197 patients from the Periodontics department of The Royal Dental Hospital of Melbourne were analysed. The clinical parameters recorded were pocket probing depth, recession, bleeding on probing, mobility and furcation involvement.Results:  The average age of our sample group was 47.5 years old, with 34.5% men and 65.5% women. The results demonstrated significant left‐to‐right distribution with all the periodontal indices recorded.Conclusion:  The findings support previous studies that show that a similar left‐to‐right distribution exists in the population studied.
Identification of a Stable Quantitative Trait Locus for Percentage Grains with White Chalkiness in Rice (Oryza sativa)
Authors: Guo Tao , Liu Xiaolu , Wan Xiangyuan , Weng Jianfeng , Liu Shijia , Liu Xi , Chen Mingjiang , Li Jingjing , Su Ning , Wu Fuqing , Cheng Zhijun , Guo Xiuping , Lei Cailin , Wang Jiulin , Jiang Ling , Wan Jianmin 
Published: April 2011

Abstract High chalkiness is a major problem in many rice‐producing areas of the world, especially in hybrid rice (Oryza sativa L.) in China. We previously showed a major quantitative trait locus for the percentage of grains with white chalkiness (QTLqPGWC‐8) in the interval G1149‐R727 on chromosome 8 using a chromosome segment substitution line (CSSL). Here, we selected the line‐CSSL50 harboring the QTLqPGWC‐8 allele from the CSSLs derived from a cross between Asominori (as a recurrent parent) and IR24 (as a donor parent), which had higher percentage chalkiness, markedly different from that of Asominori. There were also significant differences in starch granules, appearance of amylose content (AAC) and milling qualities between Asominori and CSSL50, but not in grain size or thousand grain weight (TGW). The BC4F2 and BC4F3 populations from a cross between CSSL50 and Asominori were used for fine mapping of qPGWC‐8. We narrowed down the location of this QTL to a 142 kb region between Indel markers 8G‐7 and 8G‐9. QTLqPGWC‐8 accounted for 50.9% of the difference in PGWC between the parents. The markers tightly linked to qPGWC‐8 should facilitate cloning of the gene underlying this QTL and will be of value for marker‐assisted selection in breeding rice varieties with better grain quality.
The closing and opening of TRPC channels by Homer1 and STIM1
Authors: Yuan J. P. , Lee K. P. , Hong J. H. , Muallem S. 
Published: April 2011

AbstractInflux of Ca2+ is a central component of the receptor‐evoked Ca2+ signal. A ubiquitous form of Ca2+ influx comes from Ca2+ channels that are activated in response to depletion of the endoplasmic reticulum Ca2+ stores and are thus named the store‐operated Ca2+‐influx channels (SOCs). One form of SOC is the transient receptor potential canonical (TRPC) channels. A major question in the field of Ca2+ signalling is the molecular mechanism that regulates the opening and closing of these channels. All TRPC channels have a Homer‐binding ligand and two conserved negative charges that interact with two terminal lysines of the stromal interacting molecule 1 (STIM1). The Homer and STIM1 sites are separated by only four amino acid residues. Based on available results, we propose a molecular mechanism by which Homer couples TRPC channels to IP3 receptors (IP3Rs) to keep these channels in the closed state. Dissociation of the TRPCs‐Homer‐IP3Rs complex allows STIM1 access to the TRPC channels negative charges to gate open these channels.
Vasomotion – what is currently thought?
Authors: Aalkjær C. , Boedtkjer D. , Matchkov V. 
Published: April 2011

AbstractThis minireview discusses vasomotion, which is the oscillation in tone of blood vessels leading to flowmotion. We will briefly discuss the prevalence of vasomotion and its potential physiological and pathophysiological relevance. We will also discuss the models that have been suggested to explain how a coordinated oscillatory activity of the smooth muscle tone can occur and emphasize the role of the endothelium, the handling of intracellular Ca2+ and the role of smooth muscle cell ion conductances. It is concluded that vasomotion is likely to enhance tissue dialysis, although this concept still requires more experimental verification, and that an understanding at the molecular level for the pathways leading to vasomotion is beginning to emerge.
Improving occurrence‐based rarity metrics in conservation studies by including multiple rarity cut‐off points
Authors: LEROY BORIS , PETILLON JULIEN , GALLON REGIS , CANARD ALAIN , YSNEL FREDERIC 
Published: April 2011

Abstract. 1. This study aims to develop a new method for assigning rarity weights to species in evaluations of the relative rarity of arthropod assemblages in conservation/monitoring studies.2. A flexible characteristic was included in the rarity weighting method by introducing the possibility of fitting the method to a rarity cut‐off point defined as the threshold of occurrence below which species are considered as being rare. This allows calculation of a rarity metric (index of relative rarityIRR) with multiple rarity cut‐off points.3. The proposed weighting method was used and compared with three previously proposed methods in a theoretical analysis.IRRvalues were then calculated for spider assemblages of a National Nature Reserve in France. Two methods of rankings were proposed: a local ranking between sites of the Nature Reserve, and aregional rankingin comparison to a reference database.4. The proposed weighting method consistently weighted species according to the chosen rarity cut‐offs. Species weights were less biased toward common species and rare species weights were less dispersed than with previous methods. Assemblages were consistently ranked according to the rarity of spiders in each assemblage. The index showed different patterns of rarity in assemblages which could not be detected by previous rarity metrics.5. This method provides an improved understanding of assemblage rarity patterns relative to previous methods and can be consistently applied to other arthropod taxa in other geographic area and/or spatial scales.
Detrital Zircon Dating of Meso‐ and Neoproterozoic Rocks in North China and Its Implications
Authors: GAO Linzhi , LIU Pengju , YIN Chongyu , ZHANG Chuanheng , DING Xiaozhong , LIU Yanxue , SONG Biao 
Published: April 2011

Abstract:New dates from Meso‐ and Neoproterozoic strata contribute to the recently defined Precambrian stratigraphical timescale of China agreed by the Subcommission on the Precambrian System, and the National Commission on Stratigraphy of China on Nov. 24, 2009. First, the age range of the Changcheng System, including the Changzhougou, Chuanlinggou, Tuanshanzi and Dahongyu formations has been constrained to 1.8–1.6 Ga. Second, the Jixian System including the Gaoyuzhuang, Yangzhuang, Wumishan, Hongshuizhuang and Tieling formations has been constrained to 1.6–1.4 Ga. Third, an as‐yet unnamed (undefined) system (1.4–1.0 Ga) is only developed in the Xiamaling Formation at the Jixian section, Tianjing. Fourth, the Qingbaikou System, including the Luotuoling and Jing'eryu formations has been constrained to 1.0–0.78 Ga. Fifth, the Nanhuan System ranges between 780–635 Ma, and the Sinian System is within 635–542 Ma. However, according to a series of SHRIMP U‐Pb dates from the late Precambrian in the Jiangnan Orogen Belt in South China Platform, the constrained strata will be redefined as in the upper part of the Qingbaikou System. To aid global geodynamics, it is useful to denote a late Precambrian section with unified, precise and high‐precision chronological dating; this is here defined in North China Block and Jiaoliao‐Korean Block. However, the Neoproterozoic Qingbaikou study in North China will be influence in whole Meso‐ and Neoproterozoic in the Jiangnan Orogenic Belt in between the Yangtze Block and the Cathaysia Block in South China.
Acanthomorph Biostratigraphic Succession of the Ediacaran Doushantuo Formation in the East Yangtze Gorges, South China
Authors: YIN Chongyu , LIU Pengju , AWRAMIK Stanley M. , CHEN Shouming , TANG Feng , GAO Linzhi , WANG Ziqiang , RIEDMAN Leigh A. 
Published: April 2011

Abstract:Large acanthomorphic acritarchs have been found in chert of the Ediacaran Doushantuo Formation at several localities in South China, including the East Yangtze Gorges of Hubei Province, Weng'an area of Guizhou Province, and elsewhere. However, their potential for biostratigraphic subdivision and correlation of Ediacaran successions is limited by facies control, taphonomic biases, and taxonomic problems. In the Yangtze Gorges, the Doushantuo Formation is generally subdivided into four lithologic members. However, in the Weng'an area, the Doushantuo Formation comprises just a lower and upper part separated by a mid‐Doushantuo erosional surface. In the Yangtze Gorges at the Zhangcunping section, the Doushantuo succession is similar to that at Weng'an. So far, the correlation between the Yangtze Gorges and Weng'an area, and elsewhere has been an issue of debate. To resolve the debate, we selected eight sections in the Yangtze Gorges area and systemically sampled chert nodules of the Doushantuo Formation, focusing in particular on the upper Doushantuo Formation. Our data confirm two different assemblages appearing separately in the second and third members, which are separated by a negative δ13C excursion (EN2). The lower assemblage is characterized by Tianzhushania and a diverse suite of large acanthomorphic acritarchs. The upper assemblage is distinguished from the lower assemblage, by (1) absence of Tianzhushania; (2) occurrence of abundant, 100–150 μm, smooth‐walled spherical microfossils; (3) occurrence of highly diverse acanthomorphic acritarchs including species extending from the second member and new forms in this member; (4) occurrence of unnamed new forms of protist; and (5) occurrence of the tubular microfossil Sinocyclocylicus guizhouensis. Since the Tianzhushania‐dominated assemblage is not present in Australia, it seems that only the upper acanthomorph assemblage is present and thus the lower Doushantuo acanthomorph assemblage is missing in Australia.
Biostratigraphic and Chemostratigraphic Correlation for the Base of the Middle Ordovician between Yichang and Western Zhejiang Areas, South China
Authors: ZHANG Yuandong , MUNNECKE Axel , CHEN Xu , CHENG Junfeng , LIU Xiao 
Published: April 2011

Abstract:The base of the Middle Ordovician (i.e. Dapingian Stage) has been defined at the first appearance datum (FAD) of conodont Baltoniodus?triangularis at Huanghuachang, Yichang, China, but the precise correlation of the boundary to regions of other facies remain to be resolved. Herein we review the biostratigraphy and chemostratigraphy of the Huanghuachang Global Standard Stratotype‐Section and Point (GSSP) section, and present our latest stratigraphic work on the nearby Chenjiahe section in Yichang, and the Hengtang Quarry section, Jiangshan, Zhejiang, which is regarded as representative of slope facies. The conodont and graptolite biostratigraphy as well as chemostratigraphy of the Chenjiahe section indicate that the base of the Middle Ordovician also falls within the graptolite Azygograptus suecicus Zone, and coincides with a high or maximum δ13C value within a minor positive carbon isotope excursion, suggesting that the base boundary can be readily recognized across the entire Yangtze Gorges area. The integrated graptolite and conodont biostratigraphy and chemostratigraphy of the Hengtang section, Jiangshan, indicates that the basal boundary probably falls within the graptolite Isograptus caduceus imitatus Zone that overlies the Azygograptus suecicus Zone, and coincides with a remarkable drop of δ13C. This difference indicates that a multi‐disciplinary approach is critical to identify the base boundary in those regions where the Baltoniodus?triangularis is absent
Geochemical Stratigraphy and Microvertebrate Assemblage Sequences across the Silurian/Devonian Transition in South China
Authors: ZHAO Wenjin , WANG Nianzhong , ZHU Min , MANN Ulrich , HERTEN Ulrich , LÜCKE Andreas 
Published: April 2011

Abstract:Carbon isotope (δ13Corg) analyses of non‐marine clastic rocks and neritic carbonates and black shales spanning the Silurian/Devonian transition are compared from two richly fossiliferous sequences in Qujing of East Yunnan and Zoige of Sichuan, South China. The two sections, Xishancun and Putonggou sections in South China, reveal positive δ13Corg shifts happening in the Upper Pridoli and Lower Devonian and reaching peak values as heavy as –25.2%‰ (Xishancun) and –19.9%‰ (Putonggou) in the lowermost Lochkovian following the first occurrence of the thelodont Parathelodus and the conodont Icriodus woschmidti woschmidti (only in Putonggou Section and together with Protathyris‐Lanceomyonia brachiopod fauna). These results replicate a globally known positive shift in δ13Corg from the uppermost Silurian to the lowermost Devonian. The δ13Corg variations across the Silurian/Devonian Boundary (SDB) at the two sections in South China exhibit a shift in carbon isotopic composition similar to the detailed SDB curves from the borehole Klonk‐1 drilled at top of the Klonk Global Standard Stratotype‐Section and Point (GSSP) in the Prague Basin, Czech Republic. In addition, four microvertebrate assemblages, including the Liaojiaoshan, Xishancun, Yanglugou and Xiaputonggou assemblages, are recognized from the Silurian/Devonian transition exposed in the Xishancun and Putonggou sections, respectively. The results from both carbon isotope stratigraphy and microvertebrate assemblage sequences suggest that the SDB in South China is located at the base of the Xishancun Formation (between sample QX‐20 and sample QX‐21) in the Xishancun Section and the lower part of the Xiaputonggou Formation (between sample ZP‐09 and sample ZP‐10) in the Putonggou Section. The isotopic trend for organic carbon together with the changes of microvertebrate remains across the SDB can offer an approach to a potential correlation of the SDB from different sedimentary facies, which help to correlate the marine with non‐marine deposits.
Correlation of the Tournaisian‐Visean Boundary Beds
Authors: HOU Hongfei , WU Xianghe , YIN Bao'an 
Published: April 2011

Abstract:With the definition and adoption of the Global Stratotype Section and Point (GSSP) for base of the Visean in China, the newly synthesized zonations and correlation of some significant fossil groups: foraminifera, conodont, coral and brachiopoda near the Tournaisian‐Visean boundary beds are reviewed, which help in the recognition of the boundary in various sedimentary facies. The occurrence of two physical events, one pre‐ and one post‐ the Tournaisian‐Visean boundary is emphasized, which allows for recognition of the position close to the Tournaisian‐Visean boundary in the field. The regional correlation in southern China and international correlation throughout Eurasia around the Tournaisian‐Visean boundary beds with the GSSP is proposed.
Lithologic Boundaries in Permian Post‐glacial Sediments of the Gondwana‐affinity Regions of China: Typical Sections, Age Range and Correlation
Authors: JIN Xiaochi , HUANG Hao , SHI Yukun , ZHAN Lipei 
Published: April 2011

Abstract:In Southwest China, Gondwana‐affinity Permo‐Carboniferous deposits are known to occur in the Northern Himalayas, the Lhasa Block and the South Qiangtang Block, the Baoshan Block and the Tengchong Bock. The three‐fold clastic successions, namely diamictite–pebbly mudstone–dark mudstone and shale are commonly interpreted as representing deposits of glacial–deglacial–post‐glacial periods in marine environments. Deposits, for example, the Dingjiazhai Formation in the Baoshan Block, the Kongshuhe Formation in the Tengchong Block, the Yongzhu Group and the Poindo Group in the Lhasa Block, are all succeeded by carbonate deposits. This marks a significant change from post‐glacial clastic environment to a carbonate environment. Available paleontological data show that the change from post‐glacial clastic environment to carbonate environment took place in the Baoshan, Tengchong and Lhasa Block at the beginning of the Artinskian. The carbonate environment in the Baoshan Block was spoiled by the eruption of the Woniusi Basalts, and in the Xainza area of the Lhasa Block was shortly replaced by clastic environment until the Kungurian. In the northern Himalayas limestones began to occur in the Late Permian in a fluctuating manner.
Progress, Problems and Prospects on the Stratigraphy and Correlation of the Kungurian Stage, Early Permian (Cisuralian) Series
Authors: WANG Yue , WANG Jing , CHEN Jun , WANG Weijie , SHEN Shuzhong , HENDERSON Charles M. 
Published: April 2011

Abstract:The Kungurian Stage is one of the three remaining stages of the Permian that is not yet defined at the base by a Global Stratotype Section and Point (GSSP). The candidate section at the Yuryuzan' River in the Urals yields few conodonts, and contains non‐marine sediments near the boundary. The search for a suitable, continuous marine succession is a principal task for the Subcommission on Permian Stratigraphy. The Leonardian, with its type area in the southwest United States, and in objective stratigraphic succession directly beneath the basal Guadalupian Roadian Stage, has priority to serve as a subseries of the Lower Permian. However, distinct provincialism limits the correlation of Leonardian fossil zones with the fusuline‐based Tethyan timescale. Conodonts can be correlated in many important regions on opposite sides of Pangea, yet contradictions arise when relating conodont zones with fusuline and ammonoid zones. The different taxonomic philosophies are highly suspected for the cause of the conflicts, but also there are different conodonts from the type Roadian in West Texas. Given that the Pamir and Darvaz in central Asia are difficult to access, further investigations should focus on South China, where abundant fusulines and ammonoids facilitate correlation throughout the Tethyan region, and where conodonts permit correlation with North America.
Terrestrial Mio‐Pliocene Boundary in the Linxia Basin, Gansu, China
Authors: DENG Tao , HOU Sukuan , SHI Qinqin , CHEN Shaokun , HE Wen , CHEN Shanqin 
Published: April 2011

Abstract:The Lower Pliocene of the Linxia Basin in Gansu Province is one of only a few representative sections for the Early Pliocene sedimentary records in northern China, and even in East Asia. Recently, abundant mammalian fossils were found from the base of red clays of the Lower Pliocene Hewangjia Formation at Duikang in Guanghe County within this basin. Previously, the Pliocene mammals were sparsely found in China, and most were collected from fluvial and lacustrine deposits in the eastern Loess Plateau. Mammals from the widely distributed Pliocene Hipparion Red Clay are less in number. The known fossils from Duikang include 20 species and belong to the Shilidun Fauna. Their faunal components are similar to the Early Pliocene Gaozhuang Fauna from Yushe, Shanxi. On the other hand, some taxa from Duikang have not been found in the Gaozhuang Fauna, are slightly more primitive in evolutionary level, and appeared mainly in the Late Miocene. As a result, the age of the Duikang fossils may be slightly earlier than that of the Gaozhuang Fauna and closer to the lower boundary of the Pliocene. The Duikang fossiliferous bed is 0.8 m above the top of the Late Miocene Liushu Formation, and the first occurrence of the three‐toed horse Hipparion pater can be regarded as a biostratigraphical marker of the Miocene/Pliocene boundary. In conclusion, Duikang is an ideal candidate locality to establish as the stratotype of the lower boundary of the Chinese terrestrial Pliocene.
A New Species of the Extinct Genus Schizolepis from the Jurassic Daohugou Flora, Inner Mongolia, China with Special Reference to the Fossil Diversity and Evolutionary Implications
Authors: ZHANG Jianwei , D'ROZARIO Ashalata , YAO Jianxin , WU Zhenjie , WANG Lijun 
Published: April 2011

Abstract: Schizolepis daohugouensis sp. nov. is described from the Jurassic sediments of Daohugou flora, from Ningcheng County, Inner Mongolia Autonomous Region, China. The female cone is slender, cylindrical in shape, seed scale complexes are loosely and helically arranged on the cone axis at intervals of 3–5 mm. The seed scales are bilobed and divided almost from the base; the scales have no evident petiole but an articulation at the region of attachment to the cone axis. Each lobe of the seed scales is oval in shape, widest at the lower middle part; lobes are obtusely pointed with entire margins. Bract scale is fan shaped. Based on the records of Schizolepis, this is the first report of the occurrence of female cone of Schizolepis with the seed scales, the winged seeds and vegetative branches preserved together in the Jurassic deposits. The new discovery provides evidence that confirms the phylogenetic position of Schizolepis to the extant Pinaceae.
Two New Fossil Lacewing Species from the Middle Jurassic of Inner Mongolia, China (Neuroptera: Grammolingiidae)
Authors: SHI Chaofan , YANG Qiang , REN Dong 
Published: April 2011

Abstract:Two new species of lacewings are described and illustrated from the Jiulongshan Formation (Middle Jurassic) of Inner Mongolia, China: Leptolingia calonervis sp. nov. and Litholingia ptesa sp. nov. (Grammolingiidae). The species can be distinguished by the following features: the outermost branch of MP2 on the hind wing did not reach the margin of wing in Leptolingia calonervis sp. nov.; the second branch of Rs forked deeply while other branches of Rs forked much later in Litholingia ptesa sp. nov.