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Article ; Online: Re: Vascular control by infrarenal aortic cross-clamping in placenta accreta spectrum disorders: description of technique.

Nieto-Calvache, A J / Rodriguez, F / Ordoñez, C A

BJOG : an international journal of obstetrics and gynaecology

2021 Volume 128, Issue 6, Page(s) 1101–1102

MeSH term(s)	Aorta, Abdominal/diagnostic imaging ; Aorta, Abdominal/surgery ; Cesarean Section ; Constriction ; Female ; Humans ; Placenta Accreta/diagnostic imaging ; Placenta Accreta/surgery ; Pregnancy
Language	English
Publishing date	2021-02-24
Publishing country	England
Document type	Letter ; Comment
ZDB-ID	2000931-8
ISSN	1471-0528 ; 0306-5456 ; 1470-0328
ISSN (online)	1471-0528
ISSN	0306-5456 ; 1470-0328
DOI	10.1111/1471-0528.16656
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Article ; Online: Giant cross-magnetic-field steps due to binary collisions between pair particles.

Aguirre, F F / Ordonez, C A

Physical review. E, Statistical, nonlinear, and soft matter physics

2015 Volume 91, Issue 3, Page(s) 33103

Abstract: Giant cross-magnetic-field steps can occur as a result of positron-electron collisions. Within a constant magnetic field (e.g., 1 T), a collision between a positron and an electron can result in a correlated drift across the magnetic field for a ... ...

Abstract	Giant cross-magnetic-field steps can occur as a result of positron-electron collisions. Within a constant magnetic field (e.g., 1 T), a collision between a positron and an electron can result in a correlated drift across the magnetic field for a continuous range of impact parameters. Within this range, drift distances orders of magnitude larger than that associated with like-charge collisions were observed by computer simulation. Outside of this range, the collisional behavior is similar to that for collisions between particles with the same charge. A theoretical analysis of the phenomenon using center-of-mass and relative coordinates provides insights regarding the occurrence of giant cross-magnetic-field steps.
Language	English
Publishing date	2015-03
Publishing country	United States
Document type	Journal Article
ISSN	1550-2376
ISSN (online)	1550-2376
DOI	10.1103/PhysRevE.91.033103
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Effect of positron space charge on operation of an antihydrogen trap.

Ordonez, C A

Physical review. E, Statistical, nonlinear, and soft matter physics

2007 Volume 76, Issue 1 Pt 2, Page(s) 17402

Abstract: Experimental conditions have recently been reported [G. Andresen, Phys. Rev. Lett. 98, 023402 (2007)] that are relevant to the prospect of trapping antihydrogen atoms. An analysis of the experimental conditions indicates that positron space charge can ... ...

Abstract	Experimental conditions have recently been reported [G. Andresen, Phys. Rev. Lett. 98, 023402 (2007)] that are relevant to the prospect of trapping antihydrogen atoms. An analysis of the experimental conditions indicates that positron space charge can have an important effect. The fraction of antiprotons that have an energy suitable for antihydrogen trapping can be reduced by drifts caused by the presence of positron space charge.
Language	English
Publishing date	2007-07
Publishing country	United States
Document type	Journal Article
ISSN	1539-3755
ISSN	1539-3755
DOI	10.1103/PhysRevE.76.017402
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Article: Fully and partially non-neutral plasma equilibria in a variable-electrode-radius Malmberg-Penning trap.

Ordonez, C A

Physical review. E, Statistical, nonlinear, and soft matter physics

2003 Volume 67, Issue 4 Pt 2, Page(s) 46401

Abstract: Two types of plasma equilibria are self-consistently computed for a three-electrode Malmberg-Penning trap that has an increase in the radius of a section of the center electrode. When a single species, fully non-neutral plasma is confined within the trap, ...

Abstract	Two types of plasma equilibria are self-consistently computed for a three-electrode Malmberg-Penning trap that has an increase in the radius of a section of the center electrode. When a single species, fully non-neutral plasma is confined within the trap, equilibria are predicted in which the plasma produces a three-dimensional electric potential well. Partially non-neutral plasma equilibria are predicted to be possible by confining a second, oppositely signed plasma species within the three-dimensional well produced by the first plasma species. Conditions that are necessary for partially non-neutral plasma equilibria to be self-consistently possible are reported. A partially non-neutral plasma formed of electrons and singly charged xenon ions is then specifically considered, first with the ions confined within a three-dimensional well produced by the electrons and next with the electrons confined within a three-dimensional well produced by the ions.
Language	English
Publishing date	2003-04
Publishing country	United States
Document type	Journal Article
ISSN	1539-3755
ISSN	1539-3755
DOI	10.1103/PhysRevE.67.046401
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Article: A milestone in the doubled haploid pathway of cassava : A milestone in the doubled haploid pathway of cassava (Manihot esculenta Crantz): cellular and molecular assessment of anther-derived structures

Perera, P. I. P / Ordoñez, C. A / Lopez-Lavalle, L. A. Becerra / Dedicova, B

Protoplasma. 2014 Jan., v. 251, no. 1

2014

Abstract: This study was aimed at inducing androgenesis in cultured anthers of cassava (Manihot esculenta Crantz) to develop a protocol for the production of doubled haploids. Microspore reprogramming was induced in cassava by cold or heat stress of anthers. Since ...

Abstract	This study was aimed at inducing androgenesis in cultured anthers of cassava (Manihot esculenta Crantz) to develop a protocol for the production of doubled haploids. Microspore reprogramming was induced in cassava by cold or heat stress of anthers. Since the anthers contain both haploid microspores and diploid somatic cells, it was essential to verify the origin of anther-derived calli. The origin of anther-derived calli was assessed by morphological screening followed by histological analysis and flow cytometry (FCM). Additionally, simple sequence repeat (SSR) and amplified fragmented length polymorphism (AFLP) assays were used for the molecular identification of the microspore-derived calli. The study clearly demonstrated the feasibility of producing microspore-derived calli using heat- or cold-pretreated anthers. Histological studies revealed reprogramming of the developmental pathway of microspores by symmetrical division of the nucleus. Flow cytometry analysis revealed different ploidy level cell types including haploids, which confirmed their origin from the microspores. The SSR and AFLP marker assays independently confirmed the histological and FCM results of a haploid origin of the calli at the DNA level. The presence of multicellular microspores in the in vitro system indicated a switch of developmental program, which constitutes a crucial step in the design of protocols for the regeneration of microspore-derived embryos and plants. This is the first detailed report of calli, embryos, and abnormal shoots originated from the haploid cells in cassava, leading to the development of a protocol for the production of doubled haploid plants in cassava.
Keywords	DNA ; Manihot esculenta ; amplified fragment length polymorphism ; androgenesis ; anthers ; callus ; cassava ; cold ; cold stress ; diploidy ; doubled haploids ; embryo (plant) ; flow cytometry ; haploidy ; heat stress ; microsatellite repeats ; microspores ; screening ; shoots ; somatic cells
Language	English
Dates of publication	2014-01
Size	p. 233-246.
Publishing place	Springer-Verlag
Document type	Article
ZDB-ID	123809-7
ISSN	1615-6102 ; 0033-183X
ISSN (online)	1615-6102
ISSN	0033-183X
DOI	10.1007/s00709-013-0543-6
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Expanding the field of acute care surgery: a systematic review of the use of resuscitative endovascular balloon occlusion of the aorta (REBOA) in cases of morbidly adherent placenta.

Manzano-Nunez, R / Escobar-Vidarte, M F / Naranjo, M P / Rodriguez, F / Ferrada, P / Casallas, J D / Ordoñez, C A

European journal of trauma and emergency surgery : official publication of the European Trauma Society

2017 Volume 44, Issue 4, Page(s) 519–526

Abstract: Purpose: Prophylactic placement of endovascular balloon occlusion catheters has grown to be part of the surgical plans to control intraoperative hemorrhage in cases of abnormal placentation. We performed a systematic literature review to investigate the ...

Abstract	Purpose: Prophylactic placement of endovascular balloon occlusion catheters has grown to be part of the surgical plans to control intraoperative hemorrhage in cases of abnormal placentation. We performed a systematic literature review to investigate the safety and effectiveness of the use of REBOA during cesarean delivery in pregnant woman with morbidly adherent placenta. Methods: A systematic review was performed. Relevant case reports and nonrandomized studies were identified by the literature search in MEDLINE. We included studies involving pregnant woman with diagnosis of abnormal placentation who underwent cesarean delivery with REBOA placed for hemorrhage control. MINORS' criteria were used to evaluate the risk of bias of included studies. A formal meta-analysis was not performed. Results: Eight studies were included in cumulative results. These studies included a total of 392 patients. Overall, REBOA was deployed in 336 patients. Six studies reported the use of REBOA as an adjunct for prophylactic hemorrhage control in pregnant woman with diagnosis of morbidly adherent placenta undergoing elective cesarean delivery. In two studies, REBOA was deployed in patients already in established hemorrhagic shock at the moment of cesarean delivery. REBOA was deployed primarily by interventional radiologists; however, one study reported a surgeon as the REBOA provider. The results from our qualitative synthesis indicate that the use of REBOA during cesarean delivery resulted in less blood loss with a low rate complications occurrence. Conclusion: REBOA is a feasible, safe, and effective means of prophylactic and remedial hemorrhage control in pregnant women with abnormal placentation undergoing cesarean delivery.
MeSH term(s)	Adult ; Aorta ; Balloon Occlusion/methods ; Blood Loss, Surgical/prevention & control ; Cesarean Section ; Female ; Humans ; Placenta Accreta ; Postpartum Hemorrhage/prevention & control ; Pregnancy ; Resuscitation/methods
Language	English
Publishing date	2017-09-19
Publishing country	Germany
Document type	Journal Article ; Review
ZDB-ID	2275480-5
ISSN	1863-9941 ; 1863-9933
ISSN (online)	1863-9941
ISSN	1863-9933
DOI	10.1007/s00068-017-0840-4
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Zs.A 1221: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (1.OG) ab Jg. 2022: Lesesaal (EG)
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Article: Reprogramming of cassava (Manihot esculenta) microspores towards sporophytic development.

Perera, P I P / Ordoñez, C A / Dedicova, B / Ortega, P E M

AoB PLANTS

2014 Volume 6

Abstract: Gametes have the unique potential to enter the sporophytic pathway, called androgenesis. The plants produced are usually haploid and recombinant due to the preceding meiosis and they can double their chromosome number to form doubled haploids, which are ... ...

Abstract	Gametes have the unique potential to enter the sporophytic pathway, called androgenesis. The plants produced are usually haploid and recombinant due to the preceding meiosis and they can double their chromosome number to form doubled haploids, which are completely homozygous. Availability of the doubled haploids facilitates mapping the genes of agronomically important traits, shortening the time of the breeding process required to produce new hybrids and homozygous varieties, and saving the time and cost for inbreeding. This study aimed to test the feasibility of using isolated and in vitro cultured immature cassava (Manihot esculenta) microspores to reprogramme and initiate sporophytic development. Different culture media and different concentrations of two ion components (Cu(2+) and Fe(2+)) were tested in two genotypes of cassava. External structural changes, nuclear divisions and cellular changes during reprogramming were analysed by scanning electron microscopy, by staining with 4',6-diamidino-2-phenylindole, and through classical histology and transmission electron microscopy. In two cassava genotypes, different developmental stages of microspores were found to initiate sporophytic cell divisions, that is, with tetrads of TMS 60444 and with mid or late uni-nucleate microspores of SM 1219-9. In the modified NLN medium (NLNS), microspore enlargements were observed. The medium supplemented with either sodium ferrous ethylene-diamine-tetraacetic acid (NaFeEDTA) or CuSO4·5H2O induced sporophytic cell division in both genotypes. A low frequency of the reprogramming and the presence of non-responsive microspores among the responsive ones in tetrads were found to be related to the viability and exine formation of the microspores. The present study clearly demonstrated that reprogramming occurs much faster in isolated microspore culture than in anther culture. This paves the way for the development of an efficient technique for the production of homozygous lines in cassava. This is the first ever detailed report of microspore reprogramming at the tetrad stage and the first report of microspore embryogenesis induction in cassava with detailed evidence.
Language	English
Publishing date	2014-05-21
Publishing country	England
Document type	Journal Article
ZDB-ID	2555823-7
ISSN	2041-2851
ISSN	2041-2851
DOI	10.1093/aobpla/plu022
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Article: Plasma two-temperature equilibration rate.

Chang, Yongbin / Ordonez, C A

Physical review. E, Statistical, nonlinear, and soft matter physics

2004 Volume 69, Issue 3 Pt 2, Page(s) 37401

Abstract: A theory is developed that is suitable for describing a two-species thermalization process in a plasma with parameters suitable for recombination to take place. Recombining plasmas have recently been produced using positrons and antiprotons [M. Amoretti ... ...

Abstract	A theory is developed that is suitable for describing a two-species thermalization process in a plasma with parameters suitable for recombination to take place. Recombining plasmas have recently been produced using positrons and antiprotons [M. Amoretti et al., Nature (London) 419, 456 (2002); G. Gabrielse et al., Phys. Rev. Lett. 89, 213401 (2002)]. The theory is not restricted to large Coulomb logarithm values, and correspondence with prior theory is shown in the limit of large Coulomb logarithm values. The theory applies for two plasma species, each having a Maxwellian velocity distribution and being weakly correlated.
Language	English
Publishing date	2004-03
Publishing country	United States
Document type	Journal Article
ISSN	1539-3755
ISSN	1539-3755
DOI	10.1103/PhysRevE.69.037401
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Article ; Online: Reprogramming of cassava (Manihot esculenta) microspores towards sporophytic development

Perera, Prasanthi I.P. / Ordoñez, C.A. / Dedicova, Beata / Ortega, PEM

AoB PLANTS

2014

Keywords	manihot esculenta ; pollen ; polen ; cassava ; mandioca
Language	English
Publishing date	2014-09-09T20:38:48Z
Publishing country	fr
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: A milestone in the doubled haploid pathway of cassava: a milestone in the doubled haploid pathway of cassava (Manihot esculenta Crantz): cellular and molecular assessment of anther-derived structures.

Perera, P I P / Ordoñez, C A / Lopez-Lavalle, L A Becerra / Dedicova, B

Protoplasma

2013 Volume 251, Issue 1, Page(s) 233–246

Abstract	This study was aimed at inducing androgenesis in cultured anthers of cassava (Manihot esculenta Crantz) to develop a protocol for the production of doubled haploids. Microspore reprogramming was induced in cassava by cold or heat stress of anthers. Since the anthers contain both haploid microspores and diploid somatic cells, it was essential to verify the origin of anther-derived calli. The origin of anther-derived calli was assessed by morphological screening followed by histological analysis and flow cytometry (FCM). Additionally, simple sequence repeat (SSR) and amplified fragmented length polymorphism (AFLP) assays were used for the molecular identification of the microspore-derived calli. The study clearly demonstrated the feasibility of producing microspore-derived calli using heat- or cold-pretreated anthers. Histological studies revealed reprogramming of the developmental pathway of microspores by symmetrical division of the nucleus. Flow cytometry analysis revealed different ploidy level cell types including haploids, which confirmed their origin from the microspores. The SSR and AFLP marker assays independently confirmed the histological and FCM results of a haploid origin of the calli at the DNA level. The presence of multicellular microspores in the in vitro system indicated a switch of developmental program, which constitutes a crucial step in the design of protocols for the regeneration of microspore-derived embryos and plants. This is the first detailed report of calli, embryos, and abnormal shoots originated from the haploid cells in cassava, leading to the development of a protocol for the production of doubled haploid plants in cassava.
MeSH term(s)	Amplified Fragment Length Polymorphism Analysis ; Cells, Cultured ; Flow Cytometry ; Haploidy ; Manihot/cytology ; Manihot/genetics ; Manihot/growth & development ; Microsatellite Repeats/genetics
Language	English
Publishing date	2013-09-13
Publishing country	Austria
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	123809-7
ISSN	1615-6102 ; 0033-183X
ISSN (online)	1615-6102
ISSN	0033-183X
DOI	10.1007/s00709-013-0543-6
Database	MEDical Literature Analysis and Retrieval System OnLINE

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