Gift

Distribution by Scientific Domains
Distribution within Humanities and Social Sciences

Kinds of Gift

  • nuptial gift

  • Terms modified by Gift

  • gift card
  • gift exchange
  • gift giving
  • gift size

  • Selected Abstracts


    Infertility and assisted reproductive technologies: Bright and dark sides

    CONGENITAL ANOMALIES, Issue 3 2001
    Kaoru Suzumori
    ABSTRACT, Infertility is defined as a couples failure to conceive following 2 years of unprotected sexual intercourse, affects 10% of reproductive age couples in Japan. There are 3 main causes: (1) ovarian failure-anovulation (29%); (2) tubal factor-anatomic defects of the female genital tract (36%); (3) male factor-abnormal spermatogenesis (31%). The goal of the infertility evaluation are to determine the probable cause of infertility regarding prognosis and to provide guidance regarding options for treatment In the event an obstruction of the fallopian tubes is discovered or spermatogenesis cannot be improved, assisted reproductive technologies (ART) such as gamete intrafallopian tube transfer (GIFT) and in vitro fertilization with embryo transfer (IVF-ET) are recommended. Since the successful birth of Louise Brown by this IVF-ET, an explosion of ART has occurred all over the world in the last decade. In this review we discuss the revolution brought about by ART focusing on results in Japan, and clarify ethical issues that must be resolved. [source]


    Culture-based fisheries in non-perennial reservoirs in Sri Lanka: production and relative performance of stocked species

    FISHERIES MANAGEMENT & ECOLOGY, Issue 4 2005
    W. M. H. K. WIJENAYAKE
    Abstract, In Sri Lanka, there is a great potential for the development of culture-based fisheries because of the availability of around 12 000 non-perennial reservoirs in the dry zone (<187 cm annual rainfall) of the island. These reservoirs fill during the north-east monsoonal period in October to December and almost completely dry up during August to October. As these non-perennial reservoirs are highly productive, hatchery-reared fish fingerlings can be stocked to develop culture-based fisheries during the water retention period of 7,9 months. The present study was conducted in 32 non-perennial reservoirs in five administrative districts in Sri Lanka. These reservoirs were stocked with fingerlings of Indian (catla Catla catla Hamilton and rohu Labeo rohita Hamilton) and Chinese (bighead carp Aristichthys nobilis Richardson) major carps, common carp Cyprinus carpio L., genetically improved farmed tilapia (GIFT) strain of Nile tilapia, Oreochromis niloticus (L.) and post-larvae of giant freshwater prawn, Macrobrachium rosenbergii De Man, at three different species combinations and overall stocking densities (SD) ranging from 218 to 3902 fingerlings ha,1, during the 2002,2003 culture cycle. Of the 32 reservoirs stocked, reliable data on harvest were obtained from 25 reservoirs. Fish yield ranged from 53 to 1801 kg ha,1 and the yields of non-perennial reservoirs in southern region were significantly (P < 0.05) higher than those in the northern region. Naturally-recruited snakehead species contributed the catches in northern reservoirs. Fish yield was curvilinearly related to reservoir area (P < 0.05), and a negative second order relationship was evident between SD and yield (P < 0.05). Chlorophyll- a and fish yield exhibited a positive second order relationship (P < 0.01). Bighead carp yield impacted positively on the total yield (P < 0.05), whereas snakehead yield impact was negative. Bighead carp, common carp and rohu appear suitable for poly-culture in non-perennial reservoirs. GIFT strain O. niloticus had the lowest specific growth rate among stocked species and freshwater prawn had a low return. [source]


    Anti-polymorphonuclear neutrophil antibodies in patients with leukopenia or neutropenia

    INTERNATIONAL JOURNAL OF LABORATORY HEMATOLOGY, Issue 1p1 2010
    N. E. RIERA
    Summary Introduction:, Immune humoral neutropenia (Np) could be the consequence of anti-polymorphonuclear neutrophil (PMN) antibodies, circulating immune complexes (CIC) and/or antibodies against myeloid precursors. Granulocyte immunofluorescence test (GIFT) and a leukoagglutination technique (LAGT) assays are recommended for its diagnosis. Methods:, Fifty adult patients with secondary Np were screened for anti-PMN. GIFT by flow cytometry from viable PMN and LAGT were employed. In addition, CIC levels, low expression of CD16b (CD16 blow), PMN phenotype and sera tumor necrosis factor-alpha (TNF-,) were also evaluated. Results:, Direct IgG-PMN binding (dir-GIFT) was positive in 16% of the patients. Antibodies against autologous PMN were detected in 32% of the samples by indirect (ind)-GIFT and demonstrated in 70% of the sera by both ind-GIFT and/or LAGT. Predominance of human neutrophil alloantigen (HNA)-1b and HNA-2 expression was confirmed. CD16blow was detected in 16% of the patient's PMN and TNF-, in 68% of sera patients. Conclusion:, Our results suggest that diagnosis of immune Np in the laboratory may be improved by focusing on patient's PMN together with the assessment of cellular markers. [source]


    THE CHURCH: GOD'S GIFT TO THE WORLD -ON THE NATURE AND PURPOSE OF THE CHURCH,

    INTERNATIONAL REVIEW OF MISSION, Issue 359 2001
    Alan D. Falconer
    [source]


    ECONOMY OF THE GIFT: RETHINKING THE ROLE OF LAND ENCLOSURE IN POLITICAL ECONOMY*

    MODERN THEOLOGY, Issue 3 2009
    TODD S. MEI
    The theological revivification of the concept of gift and gift exchange in the last two decades has provoked questions on how notions of divine superabundance can be translated into economics. In this article, I relate the thinking of Paul Ricoeur, John Milbank, Philip Goodchild and Albino Barrera to a specific economic reform that entails seeing land enclosure as inimical to the stability and fairness of an economy. I refer to the political economy of Henry George (1839,97) which takes land value taxation to be its centrally defining principle for a just economy. [source]


    THE CRUCIFIXION AS REALISATION OF IDENTITY: THE GIFT OF RECOGNITION AND REPRESENTATION

    MODERN THEOLOGY, Issue 2 2006
    JAN-OLAV HENRIKSEN
    This essay approaches the complex structure of the Christian's identity from the perspective of the crucifixion of Christ. Central to this approach are the concepts of recognition and representation, which are employed to clarify presuppositions of Christian identity that can be seen as theologically and philosophically prior to the doctrinal conceptions of reconciliation and atonement. The cross can be seen as a gift only if it is simultaneously conceived of as a possibility for receiving a new identity through the recognition of God both as the other represented and representing the human on the cross. On the basis of recognition and representation, implications concerning the more doctrinal formulation of Christology, anthropology and soteriology are spelled out. [source]


    LEVINAS'S EARLY MODEL OF SELF AND THE GIFT OF TIME

    PHILOSOPHICAL FORUM, Issue 3 2010
    JEFFREY P. OGLE
    First page of article [source]


    THE SERMON ON MOUNT MORIAH: FAITH AND THE SECRET IN THE GIFT OF DEATH

    THE HEYTHROP JOURNAL, Issue 1 2008
    ADAM KOTSKO
    This essay is an investigation of three attempts to think faith. I find my starting place in Jacques Derrida's The Gift of Death,1 one of the most important treatments of Christianity in Derrida's later thought, which was increasingly insistent in its engagement with religious questions up until his death in 2004. This reading of The Gift of Death will focus particularly on the question of secrecy and its relationship with faith, leading necessarily to an account of Derrida's reading of two of his primary references in this text: the second essay of Nietzsche's Genealogy of Morals2 and Kierkegaard's Fear and Trembling.3 Rather than simply rendering a judgment on Derrida's reading, I will endeavor to read these texts together, extending (or expanding upon) Derrida's reading while questioning some of the positive formulations he makes in his own name , all the while remaining attentive to the gambles involved in thinking faith. [source]


    Genetic characterization of four strains of Nile tilapia (Oreochromis niloticus L.) using microsatellite markers

    ANIMAL GENETICS, Issue 2 2004
    M. J. M. Rutten
    Summary Four domesticated strains of Nile tilapia (Oreochromis niloticus L.) were genetically characterized using 14 microsatellite markers and 64 animals per strain. Two strains, Chitralada (AIT) and International Development Research Centers (IDRC) were obtained from the AIT institute, Bangkok, Thailand. The GIFT strain (5th generation) came from NAGRI, Thailand, and the GÖTT strain was supplied by the University of Göttingen, Germany. The average numbers of alleles per marker were 5.0 (GÖTT), 5.4 (AIT), 5.6 (IDRC) and 7.5 (GIFT). Private alleles were found at all markers with the exception of two. No fixation of alleles was found at any marker. Population differentiation, FST, was 0.178 (great genetic differentiation) and confirmed grouping of the animals in strains. The expected level of heterozygosity ranged from 0.624 to 0.711, but the observed level of heterozygosity significantly deviated from the expected level in three strains. This was probably because of small population size. Moderate to great genetic differentiation was found between strains. A phylogenetic tree reflected the strains known histories. Application of the Weitzman approach showed that all strains have added value for the total genetic diversity and thus should be retained. [source]


    Growth performance of mixed sex, hormonally sex reversed and progeny of YY male tilapia of the GIFT strain, Oreochromis niloticus

    AQUACULTURE RESEARCH, Issue 6 2009
    Norhidayat Kamaruzzaman
    Abstract The growth performance of three experimental groups consisting of mixed sex fish (control), hormone-treated fish and progeny of YY male tilapia, all originated from the genetically improved farmed tilapia (GIFT) strain was evaluated. Masculinization of sexually undifferentiated fry was achieved by providing a supplement of 5 mg of 17-,-methyltestosterone per kg of feed over a period of 21 days (after sac absorption). Both mixed sex and progeny of YY male groups were fed a standard commercial ration. Mixed sex fish did not deviate significantly (P>0.05) from the 1:1 male to female ratio. Percentages of male averaged 75% in hormone-treated fish and 95% in YY male group over the sampling periods and at final harvest. The effect of sex on weight and length was statistically significant (P<0.001). The model used to analyse weight and length included experimental group and sex in each culture period as the fixed effects, and replicate cages as the random effect. Over the culture period of 141 days, there were no statistical differences (P>0.05) in body weight and length between mixed sex, hormonally treated and progeny of YY males. There were also no significant differences in level of variability in harvest weight between three groups of fish when the data were classified into five categories (=<100, 100 to <150, 150 to <200, 200 to <250 and ,250 g). It is concluded that monosex culture of all male tilapia would be of no advantage over mixed sex culture for the GIFT strain under conditions of cages suspended in earthen ponds. [source]


    Overwintering performance of Nile tilapia Oreochromis niloticus (L.) broodfish and seed at ambient temperatures in northern Vietnam

    AQUACULTURE RESEARCH, Issue 6 2000
    N C Dan
    Two experiments (E1 and E2) to assess the performance of tilapia broodstock and tilapia sex-reversed fry in overwintering were conducted at the Research Institute for Aquaculture No.1 (RIA-1) in the cold seasons of 1995,96 and 1996,97. Nile tilapia Oreochromis niloticus (L.) broodstock of the Thai, GIFT, Egypt and Viet strains were overwintered in deep and shallow ponds, as well as in deep and shallow hapas suspended in a single deep pond for evaluation of the influence of overwintering systems on the survival and growth of fish. Large (> 1 g) and small (< 1 g) tilapia seed were overwintered in deep hapas-in-ponds for comparison of their performance. In 1995,96, the coldest pond water temperature was 10,11 °C, and survival of tilapia broodfish overwintered in deep and shallow hapas-in-ponds was 99.6,100%. This was significantly (P < 0.05) higher than fish stocked in deep and shallow ponds (74.4,90%). The survival rate of larger monosex tilapia fry was 54%, which was significantly (P < 0.05) higher than that of smaller fry (33.4%). In 1996,97, the lowest pond water temperature was 15.8 °C, and fry showed similarly high survival rates in all treatments (97,100%). There was no significant difference between fry in the two size classes. The results of this study clearly indicate that hapas-in-ponds are useful for reducing the risk and improving the survival of tilapia broodstock and fry in the cold season. Differences in the decline in ambient temperatures year on year mean that the need for special overwintering conditions varies. Hapas-in-ponds are a low-cost overwintering method that can be one of the appropriate strategies for tilapia seed production under the variable, cool temperature regimes in northern Vietnam. [source]


    THE SOCIAL LIFE OF THE BYZANTINE GIFT: THE ROYAL CROWN OF HUNGARY RE-INVENTED

    ART HISTORY, Issue 5 2008
    CECILY J. HILSDALE
    Inspired by what anthropologists have called the social life of things, this article traces the shifting significations of the Royal Crown of Hungary. As an object central to notions of legitimacy in a land that served as a battleground for Eastern and Western powers during the medieval and modern eras, the crown over its contested history has come to be seen as a composite symbol of political independence and Western cultural affiliation. A thorough archaeology of the crown, however, reveals its origins as an eleventh-century diadem designed for a Byzantine princess. Subsequently this open crown was transformed into the closed crown worn by the king of a powerful and emerging Western monarchy. In the process of this re-gendering, the object was reconceived as papal gift. Bridging both instantiations is the crown's status as a gift, replete with associations of power and subjugation that anthropologists of gift-giving practices have long recognized. [source]


    NUPTIAL GIFTS AND THE EVOLUTION OF MALE BODY SIZE

    EVOLUTION, Issue 3 2002
    Kenneth M. Fedorka
    Abstract In many insect systems, males donate nuptial gifts to insure an effective copulation or as a form of paternal investment. However, if gift magnitude is both body size-limited and positively related to fitness, then the opportunity exists for the gift to promote the evolution of large male size. In the striped ground cricket, Allonemobius socius, males transfer a body size-limited, somatic nuptial gift that is comprised primarily of hemolymph. To address the implications of this gift on male size evolution, we quantified the intensity and direction of natural (fecundity) and sexual (mating success) selection over multiple generations. We found that male size was under strong positive sexual selection throughout the breeding season. This pattern of selection was similar in successive generations spanning multiple years. Male size was also under strong natural selection, with the largest males siring the most offspring. However, multivariate selection gradients indicated that gift size, and not male size, was the best predictor of female fecundity. In other words, direct fecundity selection for larger gifts placed indirect positive selection on male body size, supporting the hypothesis that nuptial gifts can influence the evolution of male body size in this system. Although female size was also under strong selection due to a size related fecundity advantage, it did not exceed selection on male size. The implications of these results with regard to the maintenance of the female-biased size dimorphic system are discussed. [source]


    The Nature of the Gift: Accountability and the Professor-Student Relationship

    EDUCATIONAL PHILOSOPHY AND THEORY, Issue 6 2007
    Ana M. Martínez-Alemán
    Abstract In this paper I introduce the theory of gift giving as a possible means to reconcile the contradictions inherent in accountability measures of ,faculty productivity' in the American university. In this paper I sketch the theory of gift economies to show how, given the historical ideals that characterize the faculty-student relationship, a theory of gift giving could help us better judge the labor of the faculty. I suggest that it is the relational character of teaching that frustrates accountability measures and that perhaps if viewed as a gift economy,and in particular an economy with ,reproductive' ends,we could better grasp the effectiveness of these relationships. [source]


    Idol and Gift in Volpone

    ENGLISH LITERARY RENAISSANCE, Issue 3 2005
    KATHARINE EISAMAN MAUS
    For their helpful comments on a draft of this essay, I thank John Portmann, Michael Murrin, Howard Marchitello and members of audiences to my lecture version of this material, as presented at the University of Maryland, Cambridge University, University of Virginia, University of Newcastle, University of Liverpool, University of Leeds, the Shakespeare Institute of the University of Birmingham at Stratford-upon-Avon, the Pittsburgh Renaissance Consortium, and the University of Utah. [source]


    Desire, Gift, and Recognition: Christology and Postmodern Philosophy , By Jan-Olav Henriksen

    MODERN THEOLOGY, Issue 4 2010
    Paul Dafydd Jones
    No abstract is available for this article. [source]


    Nachituti's Gift: Economy, Society, and Environment in Central Africa

    AMERICAN ANTHROPOLOGIST, Issue 2 2007
    MARLOES KRAAN
    Nachituti's Gift: Economy, Society, and Environment in Central Africa. David M. Gordon. Madison: University of Wisconsin Press, 2006. 304 pp. [source]


    Identity and Development: Tongan Culture, Agriculture, and the Perenniality of the Gift

    AMERICAN ANTHROPOLOGIST, Issue 1 2006
    HAROLD ODDEN
    Identity and Development: Tongan Culture, Agriculture, and the Perenniality of the Gift. Paul van der Grijp. Leiden: KITLV Press, 2004. 227 pp. [source]


    After Innocence: Gillian Rose's Reception and Gift of Faith.

    THE HEYTHROP JOURNAL, Issue 4 2010
    By Andrew Shanks, Transcendence: On the Unfinished Project of Gillian Rose.
    No abstract is available for this article. [source]


    Outcome Evaluation of ,Sharing the Gift of Life': An Organ and Tissue Donation Educational Program for American Indians

    AMERICAN JOURNAL OF TRANSPLANTATION, Issue 6 2010
    N. L. Fahrenwald
    Culturally focused education about deceased donation is needed for American Indians (AIs). This study tested a program designed to impact intention to serve as a deceased donor for reservation dwelling AIs. A pre/posttest design and a community-based participatory research approach were used. The study was based upon the Transtheoretical Model. Adult participants (N = 1580, 58% women) were from four Northern Plains reservations. An outreach coordinator delivered the program using print and video materials. The outcome was stage of motivational readiness (SMR) to serve as a deceased donor. McNemar's test was used to compare pre- to postintervention changes in SMR. At baseline, 55% of participants were not thinking about being a donor (precontemplation stage) and 45% were thinking about it (contemplation stage). Postintervention, 43.1% of participants were unchanged in SMR and 56.9% progressed in SMR. Of those who progressed, 26.5% (n = 418) changed to the contemplation stage, 19.4% (n= 306) changed to the preparation stage (signed a donor card or joined a registry), and 11.1% (n = 175) confirmed a discussion of the decision with family (action stage). Progression in SMR from pre/post was significant, ,2(1) = 18.32, p < 0.05. The intervention resulted in important changes in deceased donor intentions for reservation dwelling AIs. [source]


    Gift of the glob goes global

    ANAESTHESIA, Issue 2 2010
    D. R. Uncles
    No abstract is available for this article. [source]


    Gift of the glob , is it foolproof?

    ANAESTHESIA, Issue 9 2009
    P. Watt
    No abstract is available for this article. [source]


    The Engineering of an Orally Active Conotoxin for the Treatment of Neuropathic Pain,

    ANGEWANDTE CHEMIE, Issue 37 2010
    Richard
    Heilendes Gift: Peptide aus dem Gift der Kegelschnecke sind potenzielle Therapeutika zur Behandlung von neuropathischem Schmerz. Ein Nachteil dieser Peptide ist ihre kurze biologische Halbwertszeit und schlechte Aktivität bei oraler Aufnahme. Ein neues oral aktives Conotoxin wurde entwickelt, das diese Probleme umgeht. [source]


    Sortase-Mediated Ligation: A Gift from Gram-Positive Bacteria to Protein Engineering

    CHEMBIOCHEM, Issue 5 2009
    Shinya Tsukiji Dr.
    Abstract A new enzymatic protein ligation tool, sortase, has recently emerged from Gram-positive bacteria. This article outlines the technique, sortase-mediated ligation, and its applications in protein engineering, which include the introduction of unnatural molecules into proteins, protein immobilization, protein,protein conjugation, protein cyclization, as a self-cleavable tag for protein expression, protein,PNA hybrids, neoglycoconjugates, and cell-surface protein labeling, etc. [source]


    Dration Models to Analyze Dating Relationships: The Controversial Role of Gift Giving

    FAMILY & CONSUMER SCIENCES RESEARCH JOURNAL, Issue 4 2000
    Ming-Hui Huang
    Gifts are proclaimed to play a vital role in making dating relationships last. In this article, however, the authors look at not only the beneficial but also the detrimental effects of gift giving in relationships. To explore the double-edged effects of gifts, this study conceptualizes gift giving in dating relationships as including three aspects: self-gift, interpersonal gift exchange, and jointgift possession. Econometric duration models are used to suggest implications for individuals. It is found that using gifts to enhance the self, express love, and announce relationships,at the proper level of frequency,helps to ensure that a relationship will be successful and lasting. When used too frequently or too rarely, gifts can result in self-depreciation, create anxiety, and spoil relationships. Individuals are advised not to consume gifts indiscriminately and thereby induce negative effects. [source]


    Argyria associated with colloidal silver supplementation

    INTERNATIONAL JOURNAL OF DERMATOLOGY, Issue 7 2003
    Jeffrey K. McKenna MD
    A 65-year-old male presented for skin examination and was incidentally noted to have discoloration of the fingernails. These findings were completely asymptomatic. The patient had been taking colloidal silver supplementation (SilverzoneÔ 140 p.p.m. silver Gifts of Nature, St. George, UT, USA) for 2 years as therapy for diabetes. He first noticed the onset of nail discoloration 1 year ago. His past medical history included type II diabetes and hypertension. His current medications were metformin, glyburide, and benazepril. Physical examination revealed slate-gray discoloration involving the lunulae of the fingernails (Fig. 1). The skin, mucous membranes, and sclerae were unaffected. Figure 1. Slate-blue pigmentation of the lunula of an affected nail [source]


    THE IMPULSE OF PHILANTHROPY

    CULTURAL ANTHROPOLOGY, Issue 4 2009
    ERICA BORNSTEIN
    ABSTRACT In practices of philanthropy and charity, the impulse to give to immediate others in distress is often tempered by its regulation. Although much of what is written on charity and philanthropy focuses on the effects of the gift, I suggest more attention be paid to the impulse of philanthropy. To coerce the impulse to give into rational accountability is to obliterate its freedom; to render giving into pure impulse is to reinforce social inequality. The only solution is to allow both to exist, and to create structures to encourage them. This essay examines the power of the spontaneous and fleeting impulse to give and its regulation through an analysis of contemporary practices of philanthropy and their relation to sacred conceptions of d,n (donation) in New Delhi. When scriptural ideas of disinterested giving intersect with contemporary notions of social responsibility, new philanthropic practices are formed. On the basis of ethnographic research with philanthropists who built temples, started NGOs, and managed social welfare programs, as well as families who gave d,n daily out of their homes, this essay documents how both NGO and government efforts to regulate one of the most meritorious forms of d,n, gupt d,n (or, anonymous d,n) expresses critical issues in philanthropy between the urge to give in response to immediate suffering and the social obligation to find a worthy recipient for the gift. [source]


    Suicides and suicide ideation in the Bible: an empirical survey

    ACTA PSYCHIATRICA SCANDINAVICA, Issue 3 2005
    H. J. Koch
    Objective:, The aim of this review is to summarize all data on suicidal behaviour reported in the Bible and to discuss basic implications for medical ethical positions. Method:, All books of the Jerusalem Bible, including the apocrypha accepted in the Catholic canon, were searched for all cases of suicide, attempted suicide and suicidal ideation clearly identifiable as such. Results:, The Bible including the apocrypha reports about 10 completed suicides and 11 cases of suicide attempt or ideation. The Bible considers human life as a divine gift but suicide per se is neither condemned nor approved. Those suffering from suicidal thoughts are treated with respect and support is offered. Conclusion:, Theological teaching on suicide was influenced for centuries by the biased negative opinion of the early fathers of the church and scholastic savants, but these opinions are not substantiated by a thorough reading of the Bible. [source]


    Ten Theses on the Future of Lutheran Theology Charisms, Contexts, and Challenges

    DIALOG, Issue 4 2002
    Niels Gregersen
    Although Lutheran theology is a gift to the historic church, Martin Luther's own views are specifically formulated for their 16th century context. No universal or timeless theological system based upon Luther's authority should be appealed to. Then theses are here advanced that bridge the 16th and 21st centuries and challenge us to creative construction. [source]


    Sale, price and valuation in Galicia and Castile,León in the tenth century

    EARLY MEDIEVAL EUROPE, Issue 2 2002
    Wendy Davies
    The number of sale transactions recorded by northern Spanish charters of the tenth century is very striking, especially in the 930s to 960s. A record of price paid was a consistent element of such documents, although words used to express price varied from silver solidi to goats, shirts and grain. Valuations, in solidi and in other units of account such as cattle, were often stated when objects were used as payment. While it looks as if some silver was really used in deals in urban León and its hinterland, using pieces of silver called argenzos, argenteos etc., elsewhere this was rare. Comparing the transactions in the three very different monastic collections of Celanova in the north,west, Sahagún in the central meseta and Cardeña in the foothills of the sierras in the north,east, regional difference is also striking. Sahagún is notable for the volume and early date of its sales and for increasing use of silver,based expressions of price and value. Round Celanova, by contrast, although there were also many sales, people used several modes of valuation simultaneously, but metal,based notions very rarely. Round Cardeña, close to urban Burgos, far fewer sales are recorded, and they come later in the century, but silver,based notions of value were the only ones used. This latter sub,urban context seems to have been much less commercially active than that of León and Sahagún, with exchange by gift and countergift a more prominent characteristic. [source]