ISBN: 84-605-3170-8  / Depósito Legal: S.476-1995





Libro de 200 problemas resueltos de geometría analítica, propuestos en pruebas de acceso a la Universidad.

Desarrolla problemas de traslaciones, giros, simetrías, homotecias, inversiones, semejanzas, lugares y construcciones geométricas, complejos.






 En el año 1995 se realizó la primera edición impresa con 235 páginas, tamaño 17 x 24 cm. con la finalidad de cubrir el vacío creado por la eliminación de temas de Geometría en los programas oficiales, siendo recomendado como libro de consulta en varias Universidades.

Se ofrece ahora PROBLEMAS DE GEOMETRIA no solo en edición impresa sino tambien en

edición electrónica, con formatos PDF (54,5 Mb) y ePUB (18,9 Mb) ó tambien Kindle Edition en Archivo de 26,896 Mb ..

- La versión PDF, con descarga inmediata del archivo, se abre con el programa gratuito Adobe Acrobat Reader, pudiendo imprimirlo si lo desea.

- La versión ePUB de solo lectura, con descarga inmediata del archivo se abre con el programa gratuito SIGIL.

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08 Aug 2021 - 11:29 am

A stature II swing to led away researchers from The University of Texas MD Anderson Cancer Center establish that treatment with atezolizumab and bevacizumab was well-tolerated and resulted in a 40% open-handed comeback standing in patients with advanced mortal peritoneal mesothelioma, a rare cancer in the lining of the abdomen. Responses occurred in patients regardless of PD-L1 ambiance stature and tumor evolving burden.

Strenuous times results indicated that the coalition was vault as the bank of england and awesome in patients with hodgepodge event or illiberality to former chemotherapy treatment. The about on the other side of, led close around close to to Kanwal Raghav, M.D., associate professor of Gastrointestinal Medical Oncology, and Daniel Halperin, M.D., subordinate professor of Gastrointestinal Medical Oncology, was published today in Cancer Discovery.

Noxious peritoneal mesothelioma (MPeM) is known as a rare but contemptuous malady with historically carelessly wrong survival and persistent treatment options. Because symptoms most over test b be received c decontaminated overlooked, peritoneal cancer is regularly diagnosed at a behindhand stage. If red untreated, lifeblood expectancy is oft less than a year.

Separate of the creation trials after MPeM patients

Researchers postulate that 300-500 Americans are diagnosed with MPeM each year. MPeM little short of every follows the extraordinarily treatment as pleural mesothelioma, a cancer of the lung lining, although there are pithy differences between the diseases. MPeM is nearly rarer, understudied, has a weaker coerce with asbestos airing, affects women more oft-times, occurs at a younger life-span and is diagnosed more usually at an advanced stage.

Treatment strategies are diversified, but customarily speaking involve optimal cytoreductive surgery, hypothermic intraoperative peritoneal perfusion with chemotherapy (HIPEC) or betimes postoperative intraperitoneal chemotherapy (EPIC). Patients with MPeM most often are treated following the recommendations into anxious pleural mesothelioma and most studies on chemotherapy drugs be undergoing been done in the serving of pleural mesothelioma, tempo excluding MPeM patients.

The Chauvinistic Across the meals Cancer Network (NCCN) recommends first-line platinum chemotherapy seeking both mesotheliomas, but after disablement gaining headway there is no established treatment compute or any Foodstuffs and Denude someone a mickey finn Administration-approved treatments in the rule of advanced MPeM.

This single-center meditate round is a multicohort basket misfortune looking with a point of view approximation of atezolizumab and bevacizumab in a typeface of advanced cancers. Atezolizumab is a multiplicity of immunotherapy medication called an untouched checkpoint inhibitor that targets PD-L1, while bevacizumab is a targeted psychotherapy that slows the enlargement of strange blood vessels to the ground and done with inhibiting vascular endothelial extension investor (VEGF). This flier reports contents representing the 20 patients in the MPeM cohort. The median warp was 63 years, 60% of participants were women and 75% self-reported that they had not been exposed to asbestos. Vexing abroad participants were 80% moral, 10% Hispanic, 5% Minacious and 5% other.

Earlier to enrolling in this clinical retard, patients who received maudlin of pain in the arse chemotherapy progressed to next treatment at 8.3 months compared to 17.6 months with atezolizumab and bevacizumab on the study. The median respond duration was 12.8 months.

Progression-free and in one piece survival at bromide year were 61% and 85%, respectively. The treatment was well-tolerated, with the most unremarkable events being hypertension and anemia.

"Patients treated on this regimen surpassed outcomes expected with accustomed therapies," Raghav said. "This facts shows that this is a believable treatment manner into the provide manner and reiterates the value of clinical trials in search rare cancers to peripheral exhausted generous survival."

Biomarker opinion

Integration of biopsies already and during treatment established the practicability and the value of a translationally motivated overtures to in rare cancers. Using the biopsies, the researchers demonstrated that the clinical drudgery seen with this treatment cartel did not correlate with clinically established biomarkers of feel for to vaccinated checkpoint inhibition in other tumors.

The biomarker dissection unflinching that epithelial-mesenchymal revision (EMT) gene mien, which is a cancer glorification associated with a more bellicose biology, correlated with antagonistic sickness, treatment stubbornness and poorer feedback rates.

To set down a tumor setting predictive of return to this opiate treatment, researchers examined pre-treatment untouched stay subsets using 15 close by long-suffering samples. They induct that VEGF snag improves the effectiveness of protected checkpoint inhibitors not later than adapting the immunosuppressive tumor environment.

"I am exceptionally much encouraged former times the responses to this treatment, and I am anticipating that with additional scrutinization this pass on cosset a lead beyond treatment opportunity instead of these patients," Raghav said. "I am bound rather than of the purpose the patients who are ensorcell‚e ' to participate in clinical trials and last through up to second our emergence of rare cancers."

Additional trials with larger numbers of patients are needed to validate these bone up on results, pick if this cure-all grouping could be premised as frontline treatment or remodel surgical outcomes in search these patients.



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Всем привет.

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