33,472 research outputs found
Comparison between a phenomenological approach and a morphoelasticity approach regarding the displacement of extracellular matrix
No full textPlastic (permanent) deformations were earlier, modeled by a phenomenological model in Peng and Vermolen (Biomech Model Mechanobiol 19(6):2525–2551, 2020). In this manusctipt, we consider a more physics-based formulation that is based on morphoelasticity. We firstly introduce the morphoelasticity approach and investigate the impact of various input variables on the output parameters by sensitivity analysis. A comparison of both model formulations shows that both models give similar computational results. Furthermore, we carry out Monte Carlo simulations of the skin contraction model containing the morphoelasticity approach. Most statistical correlations from the two models are similar, however, the impact of the collagen density on the severeness of contraction is larger for the morphoelasticity model than for the phenomenological model.Numerical Analysi
On the divergence difficulty of quantized field theories and the rigorous treatment of radiation reaction : with related additional papers
No full textBy an orthodox application of the perturbation theory to the general case of a quantized field, it is shown that the divergence difficulty hitherto encountered arises from a faulty application of the expansion method. The difficulty disappears if the degeneracy of the unperturbed system is properly treated by the method of secular perturbation. Physically, it is shown that this amounts to a rigorous treatment of the radiation reaction.On the divergence difficulty of quantized field theories and the rigorous treatment of radiation reaction || Anomalous Scattering of Mesons / W. Heitler and H.W. Peng. Reprinted from The Physical Review, Vol. 62, Nos. 1 and 2, 81-82, July 1 and 15, 1942 || On the production of mesons by proton-proton collisions / W. Heitler and H.W. Peng. Proceedings of the Royal Irish Academy Vol. XLIX, Section A, No. 7 || On the Production of Mesons by Light Quanta and Related Processes / by J. Hamilton and H. W. Peng. Proceedings of the Royal Irish Academy Vol. XLIX, Section A, No. 11 || On the cascade production of mesons / H. W. Peng. Proceedings of the Royal Irish Academy Vol. XLIX, Section A, No. 14 || Theory of cosmic-ray mesons / J. Hamilton, W. Heitler, and H. W. Peng. Reprinted from The Physical Review, Vol. 64, Nos. 3 and 4, 78-94, August 1 and 15, 1943 || Quantum Mechanics of Fields. 1. Pure Fields / by Professor Max Born, F.R.S., and H. W. Peng. [Proceedings of the Royal Society of Edinburgh Section A: Mathematics. Volume 62, Issue 1, 1944 , pp. 40-57] || Statistical mechanics of fields and the 'apeiron'. Reprinted from Nature, vol. 153, page 164, February 5, 1944 || Quantum Mechanics of Fields. 11. Statistics of Pure Fields / by Professor Max Born, F.R.S., and H. W. Peng. Proceedings of the Royal Society of Edinburgh Section A: Mathematics. Volume LXII, Part 1 (no. 12) || Quantum Mechanics of Fields. Ill. Electromagnetic Field and Electron Field in Interaction / by Professor Max Born, F.R.S., and H. W. Peng. Proceedings of the Royal Society of Edinburgh Section A: Mathematics. Volume LXII, Part II (no. 15) || The Divergence Difficulty of Quantized Field Theories. Reprinted from Nature, vol. 154, page 544, October 28, 1944
Blokada okołopanewkowej grupy nerwów (PENG) w zabiegach w obrębie stawu biodrowego. Przegląd narracyjny
No full textIntroduction. Perioperative pain management associated with hip surgery is challenging. The pericapsular nerve group (PENG) block is a new technique thought to provide better postoperative analgesia in addition to its motor-sparing effects.
Aim. This review aims to evaluate the safety and efficacy of the PENG blockade in managing postoperative pain in patients undergoing hip surgery.
Methods. The literature was reviewed through four electronic databases: PubMed, Cochrane Library, Google Scholar, and Embase.
Results. The initial search yielded 416 articles. Twenty-seven relevant articles were selected based on relevance, recentness, search quality, and citations. Twelve of the studies were related to patients undergoing total hip arthroplasty. Twelve studies were related to patients undergoing total hip surgery due to hip fracture. Finally, three studies were related to patients undergoing hip arthroscopy.
Conclusions. The PENG block provides superior analgesia and low opioid consumption in the first postoperative period. However, current evidence is insufficient, and there is a need for high-quality randomized, controlled trials with larger sample sizes.Wstęp. Leczenie bólu okołooperacyjnego związanego z operacją stawu biodrowego jest bardzo wymagające. Blokada grupy nerwów okołopanewkowych (PENG) to nowa technika anestezji regionalnej, która zapewnia lepszą analgezję pooperacyjną, nie upośledzając funkcji motorycznych.
Cel. Celem tego przeglądu jest ocena bezpieczeństwa i skuteczności blokady PENG w leczeniu bólu pooperacyjnego u pacjentów poddawanych operacjom stawu biodrowego.
Metody. Literatura została przejrzana za pośrednictwem czterech elektronicznych baz danych: PubMed, Cochrane Library, Google Scholar i Embase.
Wyniki. Wstępne wyszukiwanie przyniosło 416 artykułów. Wybrano dwadzieścia siedem odpowiednich artykułów na podstawie trafności, aktualności, jakości wyszukiwania i cytowań. Dwanaście badań dotyczyło pacjentów poddawanych całkowitej alloplastyce stawu biodrowego z powodu zaawansowanej
choroby zwyrodnieniowej. Dwanaście badań dotyczyło pacjentów poddawanych całkowitej operacji stawu biodrowego z powodu złamania szyjki kości udowej. Wreszcie trzy badania dotyczyły pacjentów poddawanych artroskopii stawu biodrowego.
Wnioski. Blokada PENG zapewnia lepszą analgezję i niskie zużycie opioidów w bezpośrednim okresie pooperacyjnym. Jednak obecne dowody są niewystarczające i istnieje potrzeba przeprowadzenia wysokiej jakości randomizowanych badań kontrolowanych z większymi próbami
Peng (Stephen) Xue
No full text1 b&w photograph.Excellent condition photograph.Head shot of Peng (Stephen) Xue, commerce student and co-op member at SMU.Written on back: 'Peng (Stephen) Xue came all the way from Beijing, China to attend Saint Mary's commerce program'; 'Peng (Stephen) Xue'; 'Nov/94'; '800.3'Date Catalogued: Apr. 12/1
Wolongia odontodes Zhao, Yin & Peng 2009
No full text<i>Wolongia odontodes</i> Zhao, Yin & Peng, 2009 <p>(Figs 21–24, 35)</p> <p> <i>Wolongia odontodes</i> Zhao, Yin & Peng, 2009: 18, f. 1–8.</p> <p> <b>Material examined: China, Yunnan:</b> 11 males and 1 female, Gongshan County, Dulongjiang Township, Longyuan Village, Bailai Group, 28º00ʹ33.0ʹ N, 98º19ʹ19.8ʹ E, 1676 m, 31 October to 3 November 2004, Guo Tang (HNU-Tang-04-06).</p> <p> <b>Diagnosis.</b> This species can be distinguished from other <i>Wolongia</i> species by the combination of the following characters: 1) tip of the conductor digitiform in ventral view (Figs 23 B, 25A); 2) conductor and embolus almost covering 2/3 of the genital bulb in ventral view (Figs 23 B, 25A); 3) cymbial base with a denticle retrolaterally (Figs 23 C, 25B); 4) atrium slightly wider than long (Figs 24 C, 26B); 5) spermatheca membranous (Figs 24 D, 26C); 6) copulatory ducts approach spermathecae from anterior-mesal angle (Figs 24 D, 26C). Females of this species are very similar to <i>W. mutica</i> n. sp., and the differences are discussed in the diagnosis of <i>W. mutica</i> n. sp..</p> <p> <b>Distribution:</b> China (Yunnan).</p>Published as part of <i>Wan, Jin-Long & Peng, Xian-Jin, 2013, The spiders of the genus Wolongia Zhu, Kim & Song, 1997 from China (Araneae: Tetragnathidae), pp. 87-134 in Zootaxa 3691 (1)</i> on page 94, DOI: 10.11646/zootaxa.3691.1.3, <a href="http://zenodo.org/record/247642">http://zenodo.org/record/247642</a>
Inhibition of Histone Acetylation by Nickel Compounds in S. cerevisiae and Mammalian Cells
No full textEpilachna paralobiera Peng, Pang et Pang 2001
No full textEpilachna paralobiera Peng, Pang et Pang, 2001 Specimens examined. Hainan: Hainan Is South Vhina Tai-tsing-lam-ts'uen back of Tai-Mo-ling Ting An, 1933.vi. 22, F.K. To (1, SYSM).Published as part of Pang, Hong, Ślipiński, Adam, U, Yap Ing W & Zuo, Yongsheng, 2012, Contribution to the knowledge of Chinese Epilachna Chevrolat with descriptions of new species (Coleoptera: Coccinellidae: Epilachnini), pp. 1-37 in Zootaxa 3420 (1) on page 22, DOI: 10.11646/zootaxa.3420.1.1, http://zenodo.org/record/28196
Transcriptional inactivation of Genes by Nickel Compounds Involves Inhibition of H4 Acetylation
No full textEpilachna malleforma Peng, Pang et Ren 2002
No full textEpilachna malleforma Peng, Pang et Ren, 2002 (Figs. 14 a–j) Specimens examined. Shaanxi: 15km SW Dongjiangkou, 1998.vii. 14–17, Bolm (2, NHMB); Qingling Mts. XUNYA NGBA 6km E, 1998.v. 23 –vi. 13, I.H. Marshal (2, NHMB). Hunan: Wulingshan, Tianzishan Nat.res., 1997.vi. 16–18, Bolm (1, NHMB)Published as part of Pang, Hong, Ślipiński, Adam, U, Yap Ing W & Zuo, Yongsheng, 2012, Contribution to the knowledge of Chinese Epilachna Chevrolat with descriptions of new species (Coleoptera: Coccinellidae: Epilachnini), pp. 1-37 in Zootaxa 3420 (1) on page 13, DOI: 10.11646/zootaxa.3420.1.1, http://zenodo.org/record/28196
Wolongia bimacroseta Wan & Peng, 2013, new species
No full text<i>Wolongia bimacroseta</i> new species <p>(Figs 3–6, 35)</p> <p> <b>Type material: Holotype:</b> male, <b>CHINA, Yunnan</b>, Tengchong County, Jietou Township, 8# boundary post of Yakou, 25.80894°N, 98.62080°E, 2890 m, 23 May 2006, Xian-jin Peng, Xin-ping Wang and Peng Hu (HNU- Wang 060523 (3)).</p> <p> <b>Paratypes: CHINA, Yunnan:</b> 1 female, Shilali forest station, 27.16519°N, 98.77891°E, 2525 m, 1 May 2004, Charles Griswold & David Kavanaugh (HNU-CGY20); 1 female, Tengchong County, Mingguang Township, Zizhi Village, up slope, 25.80975°N, 98.62081°E, 2880 m, down slope, 25.79808°N, 98.62406°E, 2756 m, 19 May 2006, Chang-min Yin, Jia-fang Hu and Ming-wei Yang (HNU-YHY06).</p> <p> <b>Etymology.</b> The specific name comes from the combination of prefix “ <i>bi-</i> ” and the Latin word “ <i>macroseta</i> ”, meaning “two” and “macrosetae” respectively, and refers to the two strong macrosetae at the tip of cymbial ectobasal process; adjective.</p> <p> <b>Diagnosis.</b> This species can be distinguished from other <i>Wolongia</i> species by the combination of the following characters: 1) femur I without rows of short macrosetae prolaterally and ventrally; 2) the longest prolateral seta on Metatarsus I and II about as long as or less than the width of Metatarsus I and II (Figs 2 B, 10A); 3) conductor with an apophysis subterminally (CSA in Fig. 9 A); 4) tip of the cymbial ectobasal process with two strong macrosetae (Figs 7 C, 9B); 5) cymbial base with a denticle retrolaterally (Figs 7 D, 9C); 6) copulatory opening anterior (Figs 8 B, 10B); 7) spermatheca membranous (Figs 8 C–E; 10C, E). Males of this species resemble <i>W. guoi</i> Zhu, Kim & Song, 1997 in similar location of the conductor and embolus on the genital bulb (Figs 7 B, 9A, 15B, 17A), but can be distinguished from the latter by: 1) prolateral and ventral surface of femur I without rows of short macrosetae which is present in <i>W. guoi</i> (Figs 15 C, F; 18A–B); 3) conductor with an subterminal apophysis which is absent in <i>W. guoi</i>; 4) tip of cymbial ectobasal process with two strong macrosetae which is absent in <i>W. guoi</i>; 5) cymbial base with a denticle retrolaterally which is absent in <i>W. guoi</i>. Females are similar to <i>W. renaria</i> n. sp. in habitus, but differ in: 1) copulatory opening anterior versus ventral in <i>W. renaria</i> n. sp. (Figs 27 B, 28A); 2. spermatheca membranous versus slightly sclerotized in <i>W. renaria</i> n. sp. (Figs 27 C–D; 28C–D).</p> <p> <b>Description. Male</b> (holotype): Total length 2.20. Cephalothorax 1.11 long, 0.80 wide. Abdomen 1.21 long, 0.95 wide. Carapace yellowish brown, with slightly dark margins. AME=ALE=PME=PLE (0.08), AME- AME=AME-ALE (0.05), PME-PME>PME-PLE (0.07>0.06), LMOA 0.21, AWMOA 0.18, PWMOA 0.23. Clypeus 0.09. Chelicerae yellowish brown, with 5 retromarginal teeth (Figs 1 B, 9D). Labium brown, width 0.23, length 0.11. Coxae brown. Legs yellowish-brown. Leg measurements: I 6.15 (1.75, 2.12, 1.58, 0.70), II 4.31 (1.25, 1.40, 1.08, 0.58), III 2.40 (0.68, 0.75, 0.59, 0.35), IV 3.28 (1.05, 1.03, 0.81, 0.39). Abdomen oval, widest medially. Dorsum yellowish-white, with a brown median stripe and six pairs of diagonal stripe-shaped white spots along the margins of stripe (Fig. 7 A). Venter brown, with a pair of white longitudinal stripes. Cymbial base with a short denticle retrolaterally (Figs 7 C, 9B); tip of the cymbial ectobasal process with two strong macrosetae in retrolateral view (Figs 7 C, 9B); conductor and embolus located on upper half of genital bulb (Figs 7 B, 9A); conductor with an apophysis subterminally (Figs 7 B, 9A).</p> <p> <b>Female</b> (paratype): Total length 2.32. Cephalothorax 1.10 long, 0.88 wide. Abdomen 1.34 long, 1.01 wide. General appearance as in male. Leg measurements: I 6.12 (1.81, 1.99, 1.51, 0.81), II 4.77 (1.45, 1.55, 1.13, 0.64), III 2.58 (0.83, 0.81, 0.58, 0.36), IV 3.80 (1.39, 1.15, 0.85, 0.41). Dorsal abdomen with a brown narrow median stripe (Fig. 8 A). Copulatory opening anterior (Figs 8 B, 10B); spermathecae membranous (Figs 8 C–E; 10C, E).</p> <p> <b>Variation.</b> Females, total length 2.32–2.70 (n=2).</p> <p> <b>Distribution.</b> China (Yunnan).</p>Published as part of <i>Wan, Jin-Long & Peng, Xian-Jin, 2013, The spiders of the genus Wolongia Zhu, Kim & Song, 1997 from China (Araneae: Tetragnathidae), pp. 87-134 in Zootaxa 3691 (1)</i> on pages 90-91, DOI: 10.11646/zootaxa.3691.1.3, <a href="http://zenodo.org/record/247642">http://zenodo.org/record/247642</a>
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