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Fluorinated 1,3,5-triazapentadienyl ligand [N{(C3F7)C(Dipp)N}2] (Dipp = 2,6- iPr2C6H3) has been used in the synthesis of monomeric gold(I)-ethylene, tBuNC, tetrahydrothiophene (THT), and PPh3 complexes. X-ray crystal structures show a rich diversity of coordination modes in which gold coordinates to the central nitrogen atom of 1,3,5-triazapentadienyl ligand in tBuNCAu[N{(C3F7)C(Dipp)N}2] and (THT)Au[N{(C3F7)C(Dipp)N}2] or one of the two terminal nitrogen atoms in [N{(C3F7)C(Dipp)N}2]Au(THT) and [N{(C3F7)C(Dipp)N}2]Au(PPh3), or to both terminal nitrogen atoms in the chelated [N{(C3F7)C(Dipp)N}2]Au(C2H4). The triazapentadienyl ligand therefore serves as either κ1-N or κ2-NN donor, and the N3C3 backbone adopts either a distorted W- or U-shaped conformation. The gold(I) THT adduct exists as a mixture of two isomers in the solid state, as evident from structural data. The gold(I) atom in tBuNCAu[N{(C3F7)C(Dipp)N}2], (THT)Au[N{(C3F7)C(Dipp)N}2], [N{(C3F7)C(Dipp)N}2]Au(THT), and [N{(C3F7)C(Dipp)N}2]Au(PPh3) display linear geometry, whereas [N{(C3F7)C(Dipp)N}2]Au(C2H4) has a three-coordinate, trigonal-planar gold site. Energies of each [N{(CF3)C(Dipp)N}2]AuL (L = ethylene, tBuNC, PPh3 and THT) in κ2-NN chelating, κ1-N central, and κ1-N terminal coordination modes of triazapentadienyl ligand have also been investigated by using DFT. [ABSTRACT FROM AUTHOR]

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Thecomplex Ag3(μ2-3,5-(CF3)2PyrPy)3(3,5-(CF3)2PyrPy= 2,2′-pyridylpyrrolide(1−) ligand) catalyticallypromotes the insertion of the carbene of ethyl diazoacetate (EDA),at room temperature, into the CC bond of a series of arenesto ultimately ring-open them and form the corresponding cycloheptatrienes.In one case, the norcaradiene intermediate can be isolated, whileregioselective CC insertion can be promoted with certain arenesubstrates. The mechanism of CC insertion, preference overC–H insertion, and origin of CC regioselectivity hasbeen probed by a combination of experimental and theoretical studies. [ABSTRACT FROM AUTHOR]

The fluorinated 1,3,5-triazapentadienyl ligands [N{(C3F7)C(2-(NO2)C6H4)N}2]−, [N{(C3F7)C(4-(NO2)C6H4)N}2]−, [N{(C3F7)C(2-(CF3)C6H4)N}2]−, and[N{(C3F7)C(2-F,6-(CF3)C6H3)N}2]−have been used assupporting ligandsin copper(I) ethylene chemistry. [N{(C3F7)C(2-(NO2)C6H4)N}2]Cu(C2H4) (7), [N{(C3F7)C(4-(NO2)C6H4)N}2]Cu(C2H4) (8), [N{(C3F7)C(2-(CF3)C6H4)N}2]Cu(C2H4) (9), and [N{(C3F7)C(2-F,6-(CF3)C6H3)N}2]Cu(C2H4) (10) are easily isolable,thermally stable solidsand display their ethylene proton and carbon resonances in the δ3.68–3.48 and 85.2–87.6 ppm regions, respectively. X-raycrystal structures reveal that 7–10feature trigonal-planar copper sites and κ2-bonded,U-shaped triazapentadienyl ligands. The Cu(I) carbonyl adducts [N{(C3F7)C(2-(NO2)C6H4)N}2]Cu(CO)(NCCH3) (16) and [N{(C3F7)C(4-(NO2)C6H4)N}2]Cu(CO)(NCCH3) (17) have alsobeen synthesized, and they have pseudotetrahedral copper sites. TheCO stretching frequencies of the compounds 16and 17and ethylene 13C NMR chemical shift data of 7–10suggest that these molecules haverather acidic copper sites and weakly donating triazapentadienyl ligands. [ABSTRACT FROM AUTHOR]

Copyright of Tecnología y Ciencias del Agua is the property of Instituto Mexicano de Tecnologia del Agua (IMTA) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The trauma patient should be handled immediately, there are various systems of care based on the A (Airway), B (Breathing) and C (Circulation); any of these systems have the same goal which is to reduce morbidity and mortality. All physicians must be trained to treat the patient with trauma, regardless of the specialty to have. [ABSTRACT FROM AUTHOR]

This article describes the relation of the human being and supernatural beings, which include at santo patrono, ancestors, coyotes and snakes. A procedure that we will permit knows a system of symbolic transactions in structure of social control similar in others studies on nagualism. This work describes those beings providing them an important role in the universe and classifying them hierarchically in aquatic and land dimensions. Too this work describes the importance of saint in community, the coyote and the snake and the activities aimed to the men that represent a disturb element for social reproduction of mazahua group. [ABSTRACT FROM AUTHOR]

This article presents elements that reveal the urgent need to reformulate public policies for the development of infrastructure, so that broad sectors of our communities of learning can incorporate Internet2 from the early phases. Such incorporation is recognized as the only way to prevent the generation of new digital gaps as Internet2 expands rapidly in developed nations. Latin America has already recognized the strategic advantage of virtual environments for developing communities of learning; however, this resource is still not used on a massive basis due to the enormous barrier of Latin America's insufficient infrastructure for ICT in schools and homes. [ABSTRACT FROM AUTHOR]

In this paper we describe the first examples of carbene transfer with donor-acceptor diazoacetates and the silver tris(pyrazolyl)borate complex {HB[3,5-(CF3)2Pz]3}Ag(THF). These reactions generally proceed in good yields and exhibit improved selectivities compared to simple diazoacetates. [ABSTRACT FROM AUTHOR]

Retrospective studies have shown that occult nipple–areolar complex (NAC) involvement in breast cancer is low, occurring in 6–10% of women undergoing skin-sparing mastectomy (SSM). The cosmetic result and high patient satisfaction of nipple-sparing mastectomy (NSM) has prompted further evaluation of the oncologic safety of this procedure. We conducted a retrospective chart review of 36 self-selected patients who underwent 51 NSM procedures between 2002 and 2007. Criterion for patient selection was no clinical evidence of nipple–areolar tumor involvement. All patients had the base of the NAC evaluated for occult tumor by permanent histologic section assessment. We also evaluated tumor size, location, axillary node status, recurrence rate, and cosmetic result. Malignant NAC involvement was found in 2 of 34 NSM (5.9%) completed for cancer which prompted subsequent removal of the NAC. Of the 51 NSM, 17 were for prophylaxis, 10 for ductal carcinoma in situ (DCIS), and 24 for invasive cancer. The average tumor size was 2.8 cm for invasive cancer and 2.5 cm for DCIS. Nine patients had positive axillary nodes. Overall, 94% of the tumors were located peripherally in the breast. After mean follow-up of 18 months, only two patients (5.9%) had local recurrence. Using careful patient selection and careful pathological evaluation of the subareolar breast tissue at surgery, NSM can be an oncologically safe procedure in patients where this is important to their quality of life. A prospective study based on focused selection criteria and long-term follow-up is currently in progress. [ABSTRACT FROM AUTHOR]

Ropivacaine is the anesthetic premises introduced to the clinical practice in 1996 and its application in neuraxials techniques in obstetrics is ample, mainly for the analgesia of the work of childbirth and for the Caesarean operation. Nevertheless, in Mexico in a revision of the last 10 years of three bibliographical sources of the country, just 20 references indicate their use in this area of the medical knowledge, but none of them with the spinal technique for Caesarean, reason why in this work their main pharmacologic aspects are reviewed, their applications by the routes epidural and spinal in Caesarean and it discusses because it has not been used by this route for the resolution of the pregnancy by the abdominal route. This new anesthetic is a good alternative in the obstetrical surgery by the advantages that offer to the patient, the surgeon and the anesthesia specialist. Its spinal application for Caesarean is recommended now in controlled clinical studies. [ABSTRACT FROM AUTHOR]

The biocide activity of Bacillus thuringiensis ( B. thuringiensis) IB-16 strain was evaluated against the blood-feeding nematode Haemonchus contortus ( H. contortus) in vitro and in vivo assays. Twenty experimental jirds ( Meriones unguiculatus) and 32 sheep were infected with H. contortus by oral route. Fourteen days post infection 10 jirds were treated with 0.2 mg per mL of IB-16 soluble toxin by intraperitoneal (i.p.) route and 8 sheep were treated with 0.5 mg of toxin per kg of body weight by intramuscular route 35 days after H. contortus infection. Same number of treated jirds and sheep were used as control. Fecal and blood samples were analyzed from experimental sheep to estimate the number of parasitic eggs, percentage of eosinophils, packed cell volume (PCV), and IgG title. All experimental jirds and 16 sheep (8 treated and 8 controls) were sacrificed at days 5, 7, and 30 after B. thuringiensis treatment. The percentage of nematode reduction was estimated from L4 and H. contortus adults. The percentage of protection was 80.0 to jirds and 73.8 and 53.3 to sheep, sacrificed at days 7 and 30, respectively. Moreover, nonsignificant difference ( P≥ 0.05) was detected from parasitic eggs, eosinophils, and PCV parameters. Significance level of IgG was observed only before H. contortus treatment with B. thuringiensis soluble toxin ( P≤ 0.05) but nonsignificant difference was observed after treatment. These results showed that B. thuringiensis activity was similar to those observed by anthelmintic treatment and it could be used as an alternative biological method. [ABSTRACT FROM AUTHOR]