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Analysi. of parti.le di.persi.n and cavi.y formati.n duri.g bulk parti.le water entry usi.g fully coupled CFD-DEM-VOF approach

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Parti.uology 2024年第7期90卷 558-580页

作者： Utkan Çalışkan Sanja Mi.kovi. Norman B.Keevi. i.sti.ute of Mi.i.g Engi.eeri.g University of British Columbia2329 West MallVancouverBC V6T 1Z4Canada

Thi. paper presents the development and vali.ati.n of a fully coupled computati.nal flui. dynami.s—di.crete element method—volume of flui.(CFD-DEM-VOF)model to si.ulate the complex behavi.r of parti.le-laden flows wi.h free *** coupli.g between the flui. and parti.le phases i. establi.hed through the i.plemented cont.nui.y,momentum,and alpha transport *** coupled parti.le forces such as drag,pressure gradi.nt,dense vi.tual mass,vi.cous,and i.terface forces are also i.tegrated,wi.h drag and dense vi.tual mass forces bei.g dependent on local *** i.tegrated conservati.e alpha transport equati.n ensures phase volume conservati.n duri.g i.teracti.ns between parti.les and ***,we have i.plemented a tri.i.ear i.terpolati.n method desi.ned to operate on unstructured hexahedral *** method has been tested for i.s abi.i.y to properly resolve the coupli.g effects i. the numeri.al si.ulati.ns,parti.ularly i. cases wi.h a relati.ely low cell-si.e *** model i. vali.ated through three di.ti.ct test cases:si.gle parti.le water entry,dam break wi.h parti.les,and water entry of a group of parti.les *** experi.ental setup i. bui.t to study the dynami.s of the water entry of a group of parti.les,where three key flow features are analyzed:the evoluti.n of average parti.le veloci.y,cavi.y shape,and parti.le di.persi.n cloud profi.es i. *** tests i.volve four di.ferent scenari.s,i.cludi.g two di.ferent water levels(16.1 and 20.1 cm)and two di.ferent parti.le densi.i.s(2650 and 4000 kg/m3).Hi.h-speed vi.eometry and parti.le tracki.g veloci.etry(usi.g i.ageJ/TrackMate)methods are employed for experi.ental data *** i. demonstrated that numeri.al results are i. excellent agreement wi.h theoreti.al predi.ti.ns and experi.ental *** study hi.hli.hts the si.ni.i.ance of vorti.es i. cavi.y shapi.g and parti.le *** vali.ated CFD-DEM-VOF model consti.utes a robust tool for si.ulati.g parti.le-laden flows,cont

关键词： CFD-DEM-VOF Tri.i.ear i.terpolati.n Parti.le-laden flow Free-surface Parti.le water entry Volume conservati.n

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Spectrophotometri. Assay for the Quanti.i.ati.n of Plasma Ethanol Levels i. Mi.e through Chromi.m-Ethanol Oxi.ati.n-Reducti.n Reacti.n

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Advances i. Bi.sci.nce and Bi.technology 2022年第4期13卷 175-187页

作者： Marcos Brandão cont. Rosana Camari.i Departamento de Farmacologi. Instituto de Ciências Biomédicas Universidade de S&#227 o Paulo S&#227 o Paulo Brasil

The quanti.i.ati.n of blood/plasma ethanol concentrati.n (BEC/PEC) i. of great i.portance i. experi.ents i.volvi.g basi. research, cli.i.al studi.s, and bi.ethanol producti.n. Tradi.i.nal methods commonly used to measure BEC can be expensi.e and requi.e hi.h-cost equi.ment and quali.i.d labor. The ai. of thi. study was to develop a low-cost method that can be performed wi.h si.ple i.frastructure commonly avai.able i. research laboratori.s. For thi., we developed a protocol to quanti.y PEC i. mi.e, usi.g the method of reducti.n of potassi.m di.hromate by ethanol. However, thi. oxi.ati.n-reducti.n (redox) reacti.n i. not speci.i. to ethanol. Thus, the PEC was measured followi.g a sequence of chemi.al reacti.ns to eli.i.ate the reducti.e i.terferi.g substances presented i. the samples. Fi.stly, we evaluated the sensi.i.i.y of the di.hromate reacti.e to ethanol and to di.ferent reduci.g substances found i. the plasma, i. order to determi.e whi.h the mai. i.terferi.g substances are. Next, once the mai. i.terferi.g substances were determi.ed i. the di.hromate reducti.n, plasma was assayed for PEC. Fi.st, mi.e recei.ed i.traperi.oneally (i.p.) sali.e (basal readi.g, 0% ethanol) or ethanol i.jecti.ns (0.5, 1, 2, 3, and 4 g/kg) and had thei. plasma collected. After plasma deprotei.i.ati.n and plasma glucose oxi.ati.n, i. was mi.ed wi.h the di.hromate/aceti. aci. reacti.e, and then the products of the redox reacti.n were determi.ed by the spectrophotometri. method. Then, we determi.ed the PEC wi.h the same plasma samples usi.g a commerci.l ethanol assay ki. as a posi.i.e cont.ol. We found an excellent correlati.n between the admi.i.tered ethanol doses and PECs i. both the methods analyzed. The values of PEC found i. the di.hromate reacti.n method were si.i.ar to those obtai.ed i. the li.erature wi.h the same ethanol doses, and to the commerci.l enzyme acti.i.y assay. Therefore, despi.e the need for a background readi.g, thi. method can be successfully appli.d to determi.e PEC

关键词： Non-Enzymati. Ethanol Quanti.i.ati.n Spectrophotometri. Assay Potassi.m Di.hromate Oxi.Reducti.n Reacti.n Blood Ethanol Concentrati.n

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Factors i.fluenci.g the Resumpti.n of Postpartum Female Sexuali.y i. Women Who Have Gi.en Bi.th Once or Several Ti.es at the i.nace Deen Materni.y Hospi.al of the Conakry Uni.ersi.y Hospi.al Centre (Gui.ea)

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Open Journal of Obstetri.s and Gynecology 2023年第10期13卷 1759-1769页

作者： i. cont. D. W. A. Leno O. Sylla A. F. M. Soumah i. Sylla B. A. Di.llo i. S. Baldé T. Sy Department of Obstetri.s and Gynaecology Ignace Deen National Hospital University Hospital Centre Conakry Guinea Department of Obstetri.s and Gynaecology Donka National Hospital University Hospital Centre Conakry Guinea

i.troducti.n: Sexuali.y i. the postpartum peri.d i. a taboo subject that rai.es many questi.ns, especi.lly among women. The ai. of thi. study was to evaluate the i.fluence of factors such as mode of deli.ery, pari.y, type of household and level of educati.n on the resumpti.n of sexuali.y, by compari.g our results wi.h those i. the li.erature. Methods: Thi. i. a prospecti.e descri.ti.e and analyti.al study, whi.h took place from 3 Apri. to 2 June 2023 i. the materni.y ward of the i.nace Deen Nati.nal Hospi.al of the Uni.ersi.y Hospi.al Centre of Conakry. The sample i.cluded marri.d women who had gi.en bi.th once or several ti.es. Results: Of 118 marri.d women who had gi.en bi.th once or several ti.es and who were questi.ned about thei. sexuali.y i. the postpartum peri.d, 75.42% (89 cases) stated that they had resumed sexual acti.i.y i. the postpartum peri.d. (The majori.y were aged 20 - 29 years (46.61%), pauci.pares (51.69%), li.i.g i. a monogamous household (88.14%), wi.h secondary educati.n (44.92%) and self-employed (38.98%). More than half (58.47%) of these women had a normal vagi.al deli.ery wi.h vulvo-peri.eal tear (5.80%), epi.i.tomy (15.94%) and i.strumental extracti.n (8.69%). The mai. reasons for resumi.g sexual acti.i.y were the desi.e to sati.fy thei. partner (50.56%) and to mai.tai. the harmony of the couple (29.21%). Resumpti.n of sexual acti.i.y was more common i. pati.nts who had gi.en bi.th by caesarean secti.n (p = 0.007) and i. pati.nts wi.h a hi.her level of educati.n (p = 0.03). However, i. was not i.fluenced by pari.y or household type. Conclusi.n: Sexuali.y remai.s a taboo subject, and i.s resurgence i. the postpartum peri.d i. i.fluenced by the mode of deli.ery and the level of educati.n and percepti.n of women. Certai. practi.es and compli.ati.ns related to chi.dbi.th can also i.fluence the resumpti.n of sexuali.y i. the postpartum peri.d.

关键词： Female Sexuali.y Post Partum Resumpti.n i.fluenci.g Factors

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Postpartum i.trauteri.e Devi.e: Use and Follow-Up of Users i. the Materni.y Ward of the Ratoma Communal Medi.al Center i. Conakry, Gui.ea

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Open Journal of Obstetri.s and Gynecology 2023年第10期13卷 1711-1721页

作者： Dani.l W. A. Leno T. M. Mi.li.ouno i. cont. A. Di.llo A. F. M. Soumah i. Sylla H. M. Kei.a D. Lamah A. Delamou T. Sy Chai. of Gynecology-Obstetri.s Gamal Abdel Nasser University of Conakry Conakry Guinea Research Uni. National Center for Training and Research in Rural Health of Maferinyah Forécariah Guinea

Objecti.e: The ai. of thi. study was to descri.e the use of the postpartum i.trauteri.e devi.e i. the materni.y ward of the Ratoma communal medi.al center i. Conakry. Methods: Thi. was a descri.ti.e cross-secti.nal study carri.d out between July 1st 2015 and June 30 2016, i.e. a durati.n of one year. Results: A total of 551 pati.nts recei.ed advi.e on vari.us cont.acepti.e methods. Most of thi. advi.e was gi.en i. the post-partum peri.d (40.2%) and duri.g antenatal care (39.1%). Of the pati.nts advi.ed, 87 (15.8%) used the i.trauteri.e devi.e. The majori.y of users (93%) were marri.d and uneducated (63.2%), and 39.1% were poor. The majori.y (56.3%) of i.tra-uteri.e devi.es were i.serted i. the i.medi.te post-partum peri.d. The majori.y of women had no adverse events ei.her duri.g the fi.st si. weeks (n = 57;65.5%) or at 3rd months (n = 75;86.2%) or 6th months (n = 76;87.4%) after i.D i.serti.n. Most users remai.ed compli.ati.n-free throughout the follow-up peri.d (n = 76;87.4% at 6th weeks and 3rd months, and n = 77;88.5% at 6th months). The cont.nuati.n rate was 89.7% at 6 weeks and 3rd months, and 87.4% at 6th months after i.serti.n. The majori.y of users (87.0%) were sati.fi.d wi.h the care they recei.ed. Conclusi.n: Thi. study showed very few compli.ati.ns among i.trauteri.e devi.e users, and hi.h cont.nuati.n and sati.facti.n rates. The i.trauteri.e devi.e i. a long-acti.g, effecti.e, reversi.le and safe cont.acepti.e that can be used by most women for bi.th spaci.g i. Gui.ea, where women do not regularly vi.i. health faci.i.i.s.

关键词： Postpartum i.trauteri.e Devi.e Use Follow-Up Coronthi. Communal Med-i.al Center Conakry Gui.ea

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