全文获取类型
收费全文 | 79篇 |
免费 | 1篇 |
专业分类
化学工业 | 36篇 |
建筑科学 | 2篇 |
轻工业 | 9篇 |
水利工程 | 1篇 |
无线电 | 1篇 |
一般工业技术 | 7篇 |
冶金工业 | 24篇 |
出版年
2023年 | 1篇 |
2022年 | 5篇 |
2021年 | 9篇 |
2018年 | 1篇 |
2017年 | 1篇 |
2016年 | 5篇 |
2015年 | 3篇 |
2014年 | 3篇 |
2013年 | 3篇 |
2012年 | 2篇 |
2011年 | 3篇 |
2010年 | 3篇 |
2009年 | 3篇 |
2008年 | 4篇 |
2007年 | 6篇 |
2006年 | 2篇 |
2005年 | 3篇 |
2004年 | 1篇 |
2003年 | 4篇 |
2002年 | 1篇 |
2001年 | 2篇 |
2000年 | 3篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1992年 | 2篇 |
1990年 | 2篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1983年 | 1篇 |
1974年 | 1篇 |
排序方式: 共有80条查询结果,搜索用时 0 毫秒
1.
Studies on the influence of anthracene coal extracts on the carbonization process of medium- and high-rank coals were undertaken. Extracts from flame coal (Int. Class. 900) and gas-coking coal (Int. Class. 632) were used as additives. The blends prepared from the examined coals and the extracts exhibited better coking properties than the parent coals. The addition of extract to the coals gave an increase in the microstrength of the resultant cokes. The effects of co-carbonization of coking coals with extracts were increases in the size of the optical texture as well as in the degree of structural ordering of cokes. In the co-carbonization of semicoking coal with addition of coal extracts, a reduction in the size of the anisotropic units and a decrease in the crystallite height of cokes were observed. No modification of the basic anisotropy of coke from anthracite by coal extract was observed. With increasing extract content in anthracite/extract blends there was an increase in the degree of structural ordering of co-carbonization products. Extract addition was unable to modify the behaviour of fusinite. Based on the results of investigation of the influence of coal extracts on the carbonization of different-rank coals, a division of coals according to the modification of the optical texture of coke is given. 相似文献
2.
Katarzyna E. Sartowska Agnieszka Korwin‐Kossakowska Ewa Polawska Paulina Lipinska Grazyna Sender 《International Journal of Food Science & Technology》2014,49(12):2635-2642
The objective of the study was to evaluate the impact of birds’ sex on the carcass composition and meat (breast muscle) nutritional value in Japanese quails in a large‐scale four‐generation study. Standard poultry feed was used, based on maize, soya bean meal and wheat. Four generations of quails were housed up to the age of 17 weeks each. Then samples of breast muscle were collected after dissection and analysed for basic nutrient content and for fatty acids composition. Results were analysed by GLM procedure in SAS, and significance of differences between birds of different sex was estimated by Duncan's test. Dissection revealed marked differences between birds’ of different sex in case of relative organ weight. Results of meat analyses showed no differences in the basic composition. Fatty acids analyses showed a more advantageous profile in female meat. 相似文献
3.
Anna Aiello Mattia Emanuela Ligotti Maider Garnica Giulia Accardi Anna Calabr Fanny Pojero Hugo Arasanz Ana Bocanegra Ester Blanco Luisa Chocarro Miriam Echaide Leticia Fernandez-Rubio Pablo Ramos Sergio Pieiro-Hermida Grazyna Kochan Nahid Zareian Farzin Farzaneh David Escors Calogero Caruso Giuseppina Candore 《International journal of molecular sciences》2022,23(17)
Vaccination, being able to prevent millions of cases of infectious diseases around the world every year, is the most effective medical intervention ever introduced. However, immunosenescence makes vaccines less effective in providing protection to older people. Although most studies explain that this is mainly due to the immunosenescence of T and B cells, the immunosenescence of innate immunity can also be a significant contributing factor. Alterations in function, number, subset, and distribution of blood neutrophils, monocytes, and natural killer and dendritic cells are detected in aging, thus potentially reducing the efficacy of vaccines in older individuals. In this paper, we focus on the immunosenescence of the innate blood immune cells. We discuss possible strategies to counteract the immunosenescence of innate immunity in order to improve the response to vaccination. In particular, we focus on advances in understanding the role and the development of new adjuvants, such as TLR agonists, considered a promising strategy to increase vaccination efficiency in older individuals. 相似文献
4.
Mother–child relationship (maternal responsiveness and shared affective positivity), observed in naturalistic interactions, and child fearfulness, assessed in standard procedures involving exposure to unfamiliar stimuli and with parental reports, were examined at 8–10 and 13–15 months in relation to child attachment in the Strange Situation at 13–15 months (N?=?108). Mother–child relationship, at 13–15 months only, predicted child security versus insecurity but not the type of insecurity. In contrast, child fearfulness was unrelated to security versus insecurity but predicted the type of insecurity and arousal in the Strange Situation. Resistant and highly aroused children (B3–C2) were more fearful than avoidant and less aroused children (A1–B2). The analyses using discrete and continuous attachment scores produced converging results. The study informs the debate on early relationships, temperament, and attachment. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
5.
We examined the affective environment in 102 families studied longitudinally when children were 7, 15, 25, 38, 52, and 67 months of age. At each assessment, every mother–child and father–child dyad was observed in typical daily contexts. Each person's emotions of affection, joy, and anger were coded. Both parents rated marital satisfaction when children were 15, 52, and 67 months. Growth curve analyses, using Actor-Partner Interdependence Modeling, examined (a) developmental changes in emotions, (b) within-relationship influences of the partner's emotions, (c) across-relationship influences of emotions in other parent's interactions with the child, and (d) associations between marital quality and emotions over time. Parents' emotional expressiveness was highest early in the child's development, and declined thereafter. Children's anger was highest at 15 months of age, and declined thereafter, and their positive emotions, particularly with mothers, increased over time. Generally, one's positive emotions and better marital quality were associated with greater positive emotion within- and across-relationships, whereas one's anger was associated with greater anger within- and across-relationships. However, any emotion expression elicited greater affection in the interaction partner. Parents' neuroticism did not account for the convergence of emotions across relationships. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
6.
Parental power assertion is traditionally studied in the behavioral domain--discipline triggered by the child's immediate misbehavior--but rarely in the cognitive domain--parent-child discussions of the child's past misbehavior. Maternal power assertion was observed in "do" and "don't" discipline contexts from 14 to 45 months and in the context of mother-child discourse about a recent misbehavior at 56 months. Mothers' use of power cohered across the "do," "don't," and discourse contexts, but its implications were domain specific. Power assertion in the "don't" discipline context predicted behavioral outcomes (more moral conduct at 56 and 73 months, less antisocial conduct at 73 months) but not cognitive outcomes (moral cognition at 56 and 73 months). Power assertion in the discourse context predicted less mature moral cognition but not moral or antisocial conduct. Mothers' high Neuroticism predicted more power assertion in all three contexts. Child effects were examined. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
7.
Herrera Nicholas C.; Zajonc R. B.; Wieczorkowska Grazyna; Cichomski Bogdan 《Canadian Metallurgical Quarterly》2003,85(1):142
Beliefs about birth rank reflect what the society regards as social reality, and they may also influence that reality. Three studies found that people believe those with different birth ranks differ in their personalities, that higher birth ranks are likely to attain higher occupational prestige, and that the personality characteristics attributed to the various birth ranks favor the actual attainment of higher occupational prestige. In one example of such beliefs, firstborns were rated as most intelligent but least creative whereas the opposite was true of last-borns. The 4th study found that those with higher birth ranks in fact attain more prestigious occupations and actually do complete more years of schooling. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
8.
Kochanska Grazyna; Friesenborg Amanda E.; Lange Lindsey A.; Martel Michelle M. 《Canadian Metallurgical Quarterly》2004,86(5):744
The authors examined the contributions of infant's temperament and parent's personality to their relationship. In Study 1, 102 infants, mothers, and fathers were studied when infants were 7 months; in Study 2, 112 infants and mothers were followed from 9 to 45 months. Infants' temperament (joy, fear, anger, and attention) was observed in standard temperament paradigms. Parents' personality measures encompassed the Big Five traits and Empathy in Study 1 and Mistrust, Manipulativeness, Aggression, Dependency, Entitlement, and Workaholism in Study 2. Parent-child relationship (shared positive affect and parental responsiveness in Studies 1 and 2 and parental tracking of the infant in Study 1) was observed in naturalistic contexts. In Study 1, mothers' Neuroticism, Empathy, and Conscientiousness and fathers' Agreeableness, Openness, and Extraversion related to the relationship with the infants. All measures of infant temperament also related to the emerging relationship. In Study 2, maternal Mistrust, Manipulativeness, Dependency, and Workaholism predicted the relationship with the child. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
9.
Studies on the influence of an additive derived from coal on the coking properties of lower-rank coals and on the structure of cokes obtained from blends have been undertaken in our laboratory since 1978. The two coal extracts from flame coal (Int. Class. 900) and gas-coking coal (Int. Class. 632) were used as additives. The results indicate that the blends prepared from low-rank coals — flame coal (Int. Class. 900), gas-flame coal (Int. Class. 721) and the extracts possess better coking properties in comparison to the parent coals. The optical texture and the degree of structure ordering of the cokes obtained from blends is related to the amount of extract in the blend. With increasing extract content in the blend, increases were observed in the amount of optically anisotropic areas in cokes from low-rank coal/extract blends and the crystallite height (Lc) of cokes from the blends. The isotropic optical texture of cokes from low-rank coals can be modified by coal extracts to an anisotropic optical texture. The non-fusible coal is the most difficult to modify. An explanation of the observed phenomena is given. 相似文献
10.
J. E. Grusec and J. J. Goodnow (see record 1994-25033-001) offered a new comprehensive reformulation of discipline encounters as context for children's internalization of parental views. They focused mainly on children's social information processing and how it affects perception and acceptance of parental messages. The model seems best suited for middle childhood and adolescence. This commentary suggests additional directions in research on internalization in early childhood. It is argued that processes such as social referencing, sensitivity to standard violations, emergence of self, emotional reactions to wrongdoing, early self-conscious emotions, and self-regulation may be important antecedents and signs of internalization in the 1st 3 yrs of life. The proposed shift from cognitive to affective and self-regulatory aspects of early conscience reveals children's temperament as an important but neglected contributor to early moral development. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献