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Search Results: 1 - 10 of 446091 matches for " Carlos M.;Scatoni "
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Morphology and biology of Porphyrosela minuta Clarke 1953 (Lepidoptera: Gracillariidae, Lithocolletinae) in Uruguay
Bentancourt, Carlos M.;Scatoni, Iris B.;
Neotropical Entomology , 2007, DOI: 10.1590/S1519-566X2007000400005
Abstract: porphyrosela minuta clarke is a gracillariid that causes damage on white clover (trifolium repens) in uruguay. in this article, the eggs, all the larval instars, the pupa and the external morphological characteristics of the adult are described. information about the insect's biology under laboratory and field conditions is presented. the eggs are laid singly on the upper surface of the leaflets. the larvae make extensive mines that appear as white blotches. the larvae develop through five instars and do not remain exposed during their development. at 25oc the life cycle lasted 16.2 days, made up of 3.0 for eggs, 8.8 for larvae and 4.4 for pupae. females began laying on the first night, and during an oviposition period that varied between five and 12 days deposited an average of 71.8 eggs. it is a multivoltine species and seven to nine generations occur between november and the end of march.
Biología de Mallocephala deserticola Berg (Lepidoptera: Arctiidae)
Bentancourt, Carlos M.;Scatoni, Iris B.;
Anais da Sociedade Entomológica do Brasil , 1998, DOI: 10.1590/S0301-80591998000200007
Abstract: the biology of mallocephala deserticola berg was studied under laboratory conditions at 25±1oc, 75±10% rh and 16 hours of light. females began oviposition in the course of 24 hours from emergence. they laid most of their eggs in the first 36 hours. the eggs were laid in masses and the mean number of eggs deposited/female was 457; 23.1% of the females did not oviposit or laid infertile eggs. virgin females deposited less eggs, and their preovipositional period was longer than mated ones. the sexual ratio was 1.7 females for each male. the adults, were dimorphic, did not feed and lived 6.5 d. eggs hatched 6.9 d after oviposition, and their viability was 89.7%. larval period ranged from 33.1 to 41.1 d according to the number of instars, six or seven, respectively. mortality did not occur in the 1st larval instar, and in the absence of food, larvae lived 8 d. the larval viability was 94.5%. the prepupal period lasted 2 d and the viability was 98.2%. in the pupal stage sexual dimorphism was evident. pupal period lasted 11.4 and 8.0 d for males and females, respectively, and the viability was 97.2%. from egg to adult emergence, developmental time ranged from 52.0 to 59.8 d according to the number of larval instars.
Biology of Bonagota cranaodes (Meyrick) (Lepidoptera: Tortricidae) on seven natural foods
Bentancourt, Carlos M.;Scatoni, Iris B.;Gonzalez, Alvaro;Franco, Jorge;
Neotropical Entomology , 2004, DOI: 10.1590/S1519-566X2004000300004
Abstract: the effect of seven natural diets on the development and reproduction of bonagota cranaodes (meyrick) was evaluated under laboratory conditions. the experiments were carried out at the temperature of 23 ± 1oc, with 70 ± 10% of rh and a photoperiod of 16:8h (l:d). the larvae were reared on apple, grapevine and honeysuckle (lonicera japonica). on the first two foods three types of diet were used: spring leaves, summer leaves and fruits. the number of instars varied from five to seven. the larvae reared on apple leaves had, in general, fewer instars than those reared on grapevine and honeysuckle leaves. the duration of larval development differed between diets. the larvae reared on spring apple leaves showed the shortest duration, and those on fruit the longest. the larvae survival was lower on fruit than on leaves, and on apples it was particularly low (17.8%). the female pupae reared on honeysuckle were heavier than those reared on the other diets. the cycle from the egg to the emergence of adults varied between 41 days on spring apple leaves and 60 days on apples. the females reared on honeysuckle and spring apple leaves were the most fecund, whereas the females on apples did not oviposit. honeysuckle and spring leaves were the most suitable foods. apples, on the other hand, were the least suitable diet, which leads one to think that larvae could hardly complete their whole cycle on this fruit.
Effects of larval diet on the development and reproduction of Argyrotaenia sphaleropa (Meyrick) (Lepidoptera: Tortricidae)
Bentancourt, Carlos M.;Scatoni, Iris B.;Gonzalez, Alvaro;Franco, Jorge;
Neotropical Entomology , 2003, DOI: 10.1590/S1519-566X2003000400004
Abstract: the effect of six natural diets on the development and reproduction of argyrotaenia sphaleropa (meyrick) was measured under laboratory conditions, at 23 ±1oc temperature, 70 ± 10% rh, and photoperiod of 16l:8d. larvae were reared on three types of diet (spring leaves, summer leaves and fruits) from two different host plants (apple tree and grapevine). larval development, number of instars, survival, weight of pupae, fecundity, and fertility varied as a function of diets. the shortest time span of larval development, the greatest pupal weight, and the greatest adult fecundity and fertility was observed on insects feeding on spring apple leaves. the duration of larval development was longer on fruits than on leaves. the lowest larval survival occurred on apple fruits. larvae with a higher number of instars generally had an increase in the time span of larval development. larval development time span (4 out of 6 treatments) as well as pupal development time span (5 out of 6 treatments) was sex dependant. on all diets the females deposited the highest number of eggs on the first day of oviposition. the results obtained reinforce the hypothesis that the larvae of a. sphaleropa first feed on both apple and grapevine leaves, and then move to the fruits, where they cause serious damage.
Freedom of Conscience is Freedom of Choice: Women’s Reproductive Needs, Rights, and their Therapeutic Implications  [PDF]
Carlos M. Del Rio
Advances in Applied Sociology (AASoci) , 2012, DOI: 10.4236/aasoci.2012.23028
Abstract: Using reasonableness, we examine the U.S. Catholic bishops’ opposition to provisions of the Affordable Care Act of 2010. Weaving contributions from theology, philosophy, and jurisprudence, we emphasize the reasonable importance of mental health therapy for women within a relevant Catholic/Christian dialogue, particularly in the wake of the U.S. Supreme Court’s decision on healthcare. We principally identify socially imbedded factors that contribute to ending unwanted pregnancies, and argue that freedom of conscience is indeed freedom of choice within which women’s reproductive needs lie under protections of the U.S. Constitution. We recognize that Catholic tradition originates in the words and behaviors of Jesus. Examining closely these actions toward women, we find no reasonable justification for the bishops’ position against women’s freedom of conscience. We also discovered that revelation does not belong exclusively to the bishops; truth continues to be revealed to all human consciences, and true freedom does not allow for coercion/castigation of dogmatic import. We advocate for women’s ability to openly discuss their struggles to meet their reproductive condundra and to deconstruct their sexual stereotypes in mental health therapy. We provide crucial recommendations to augment choices for women’s reproduction condundra, and incite the need for new epistemic frameworks to address the complexity of female sexuality.
Brand Relationships: A Personality-Based Approach  [PDF]
Helena M. Nobre, Kip Becker, Carlos Brito
Journal of Service Science and Management (JSSM) , 2010, DOI: 10.4236/jssm.2010.32026
Abstract: The authors investigated the relationship between brand personality and brand relationships. The conceptual model was based on the hypothesis that brand personality may nurture specific consumer-brand relationships and that these relationships may influence the quality of the ties that consumers develop with brands. An instrument from intimate interpersonal relationships was used to measure consumer-brand relationships. An SEM analysis conducted on a sample of 733 consumer-brand relationships, involving nine highly known brands of different product categories, gave support to the theory. The research offers two significant contributions by: 1) Emphasizing the role of consumer-brand relationship in understanding multi-brand, symbolic consumption and 2) Offering a holistic perspective in the understanding of brand personality.
CT Guided Bone Marrow Aspiration and Core Biopsy  [PDF]
Carlos M. Badiola, Folco Scappaticci, Driola Brahaj
Open Journal of Radiology (OJRad) , 2012, DOI: 10.4236/ojrad.2012.22010
Abstract: Hemorrhagic complications related to bone marrow aspiration and trephine biopsy are uncommon. Risk factors include thrombocytopenia, myeloproliferative disorders, concurrent use of anticoagulants, and obesity. Here we describe our technique for bone marrow aspiration and biopsy of the posterior iliac crest using CT guidance. Our technique ensures needle passage only through subcutaneous fat and bone, avoiding muscle and neurovascular structures, as well as controlled and precise needle advancement within bone. This technique should be considered for use in patients that are at increased risk for procedure related complications, particularly obese patients, where surface anatomical landmarks may prove unreliable.
Transcriptional activity of transposable elements in maize
Carlos M Vicient
BMC Genomics , 2010, DOI: 10.1186/1471-2164-11-601
Abstract: We have investigated the transcriptional activity of 56 families of transposable elements in different maize organs based on the systematic search of more than two million expressed sequence tags. At least 1.5% maize ESTs show sequence similarity with transposable elements. According to these data, the patterns of expression of each transposable element family is variable, even within the same class of elements. In general, transcriptional activity of the gypsy-like retrotransposons is higher compared to other classes. Transcriptional activity of several transposable elements is specially high in shoot apical meristem and sperm cells. Sequence comparisons between genomic and transcribed sequences suggest that only a few copies are transcriptionally active.The use of powerful high-throughput sequencing methodologies allowed us to elucidate the extent and character of repetitive element transcription in maize cells. The finding that some families of transposable elements have a considerable transcriptional activity in some tissues suggests that, either transposition is more frequent than previously expected, or cells can control transposition at a post-transcriptional level.Transposable elements (TEs) are DNA sequences that move from one location to another within the genome or can produce copies of themselves. Eukaryotic TEs are divided into two classes, according to whether their transposition intermediate is RNA (class I) or DNA (class II). Each class contain elements that encode functional products required for transposition (autonomous) and elements that only retain the cis sequences necessary for recognition by the transposition machinery (non-autonomous). Class I elements can be divided into several subclasses: SINEs, LINEs, long terminal repeat (LTR) retrotransposons and TRIMs (Terminal-repeat Retrotransposons In Miniature), which are LTR non-autonomous elements [1]. Class II elements comprise autonomous and non-autonomous transposons, including the MITEs (Min
Can luteal regression be reversed?
Carlos M Telleria
Reproductive Biology and Endocrinology , 2006, DOI: 10.1186/1477-7827-4-53
Abstract: The corpus luteum is a peculiar endocrine gland owing to its limited functional life. How long this gland lives and when it dies is dictated by a synchronized interplay of hormonally regulated events. It undergoes a complex process of formation or luteinization, which is followed by a period of active function that is mostly focused on the production of progesterone. Finally, the gland undergoes a process of regression associated with the decline in progesterone output and the demise of the tissue as a consequence of the programmed death of the luteal cells. A number of excellent review articles have been published in the last 6–7 years compiling the knowledge mastered on the molecular regulation of the formation, function and regression of the corpus luteum [1-13]. Yet, although luteal regression has been intensively studied, many of the regulatory mechanisms involved in loss of function and involution of the luteal structure are not completely understood. One fundamental question that remains without an answer is whether the process of luteal regression, once initiated, can be blocked or even reversed. In other words, can luteal function be rescued when it has already been impaired? Or instead, is luteal regression an irreversible event that cannot be modified when it progresses beyond a particular molecular step?It is known that a cycling corpus luteum can survive longer if it is rescued by luteotropins. Physiologically this rescue takes place when the gland is fully functioning. For example in humans, chorionic gonadotropin produced by the trophoblast cells targets and rescues the corpus luteum at the mid-luteal phase of the menstrual cycle when the gland is at the maximal steroidogenic output attainable during non-pregnant cycles [8,14]. In the rat, vaginal stimulation during coitus triggers a neuroendocrine reflex that leads to the secretion of pituitary prolactin in a pattern of two daily surges. Prolactin then targets and rescues the corpus luteum in the mor
MáS ALLá DE LA SELECCIóN NATURAL
SARMIENTO M,CARLOS E;
Acta Biológica Colombiana , 2009,
Abstract: the explanation of the evolution of organisms through natural selection is the nucleus of the system of concepts of the biology thanks to is simplicity, its explanatory power and its coherence with an impressive amount of data. however, in some cases this model has become a by default discourse that does not allow to penetrate and discover much more complex processes. this difficulty has been pointed out by several authors and the present paper summarizes several of the alternatives or delimitations at several levels: the consequences of genetic neutralism are explored. the implications of the complex relationship between genotype and phenotype are studied since these may made difficult the use of simple genetic models for the study of evolution by natural selection. the proposal of extending a neutral model for morphological traits through the concept of functional equivalence is discussed. some of the controversial aspects of the use of the concept of adaptation are analyzed and the insightful effect of including the phylogenetic history in the explanation of the origin of the proposed adaptive characters is discussed. the consequences of these analyses are reviewed in four areas: adaptation, species definition, phylogenetic reconstructions and conservation. at no point this document denies the value of the model of evolution by natural selection but points out the importance of alternative models strongly supported by data rigorously analyzed.
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