检索结果-南通市图书馆

北京大学教育评论 2008年第2期6卷 67-71页

作者：罗伯特·w·海伯熊耕(译) 加拿大第一民族大学里贾纳南开大学高等教育研究所

原住民是加拿大人口增长最快的少数民族。而且正经历着大规模由农村移民到城市的过程,这一过程是其他民族都必须经历的。然而加拿大原住民在正规教育和教育机会方面还落后于整个国家的水准。造成这种现实的原因是复杂的,涉及历史关系、... 详细信息

原住民是加拿大人口增长最快的少数民族。而且正经历着大规模由农村移民到城市的过程,这一过程是其他民族都必须经历的。然而加拿大原住民在正规教育和教育机会方面还落后于整个国家的水准。造成这种现实的原因是复杂的,涉及历史关系、政府政策、变化的形势以及社会经济挑战等因素。本文力图阐述存在的问题并分析其对原住民教育机会的限制,同时对克服原住民教育机会不平等的具体措施进行了探讨。

关键词：原住民教育印第安人教育

Circadian rhythms of feeding, oviposition, and emergence of the boll weevil （Coleoptera： Curculionidae）

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Insect Science 2006年第6期13卷 461-467页

作者： SHOIL M. GREENBERG J. SCOTT ARMSTRONG MAMOUDOUSETAMOU THOMAS w. SAPPINGTON RANDY J. COLEMAN TONG-XIAN LIU USDA-ARS-SARC-BIRU Texas A&M University Agricultural Experiment Station Weslaco Texas USDA-ARS-CICGRU Ames Iow USA

Circadian rhythm of feeding, oviposition, and emergence of boll weevil adults were determined at five different photophases （24, 14, 12, 10, and 0 hours） and a constant 27℃ temperature, 65% RH in the laboratory. Squares from Petri dishes, where they were exposed to boll weevil females, were removed and examined for feeding and oviposition punctures every 4 hours during daylight （0700-1900 h） and every 12 h at night （1900-0700 h） over eight consecutive days. Cohorts of randomly selected egg-punctured squares were sampled from ovipositing females at 0700, 1100, 1500, and 1900 during 24 hours and under different photophase treatments, and maintained in Petri dishes at 27 ＋ I℃, 65% RH. Dishes were observed twice daily （1900 and 0700 h） for adults emerging at day or night. Circadian rhythm of oviposition was not affected by the length of the photophase. The boll weevil has round-the-clock circadian rhythm of oviposition, with a daytime preference. we observed that 82.4%-86.0% of the boll weevil eggs were deposited between 0700 and 1900 h, and 14.0%-17.6% between 1900 and 0700 h during a 24-h period. Feeding of boll weevil females in photoperiods 24：0 h （complete light） and 0：24 h （complete darkness） did not significantly change between 0700-1900 h versus 1900-0700 h, while the d .ally cycle of light and darkness in other photoperiods significantly increased the feeding punctures from 0700-1900 compared with 1900-0700 h. The circadian rhythm of emergence depended significantly on the time of oviposition and the length of the photophase. Investigation of boll weevil circadian rhythm provides a better understanding of boll weevil ecology and reveals potential weak links for improving control technologies targeting their reproductive strategies.

关键词： Anthonomus grandis emergence circadian rhythm oviposition photophase

The Effects of Dietary Restriction and Aging on in Vivo and in Vitro Binding of Aflatoxin B_1 to Cellular DNA

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 1991年第1期4卷 134-143页

作者： MING w.CHOU REX A.PEGRAM PU GAO S.R.HANSARD J.G.SHADDOCK D.A.CASCIANO National Center for Toxicological Research JeffersonNational Center for Toxicological Research JeffersonNational Center for Toxicological Research JeffersonNational Center for Toxicological Research JeffersonNational Center for Toxicological Research JeffersonNational Arkansas AR 72079 To whom repucsts for reprints should be addressed Arkansas AR 72079 US EPA HERL MD-74 Research Triangle Park NC 27711 Arkansas AR 72079 Arkansas AR 72079Arkansas AR 72079Center for Toxicological Research Jefferson Arkansas AR 72079

Laboratory animals maintained on a reduced calorie but nutritionally adequate diet have extended life spans and lowered incidences of spontaneous and chemically induced cancers compared to ad libitum- fed counterparts. Many of the effects of dietary restriction on laboratory animals have been suggested to be related to a deceleration of the aging process. The inhibition of age-related changes in xenobiotic metabolizing enzyme activities by dietary restriction has previously been reported. Alterations of these enzyme activities may cause changes in metabolic activation of carcinogens and, therefore, carcinogen-DNA binding. DNA-repair capability has also been reported to be enhanced in diet-restricted rats. Using AFB1 as a model carcinogen, we have studied in vivo and in vitro hepatic AFB1 -DNA binding, demonstrating that dietary restriction (60% of ad libitum consumption) may decrease the metabolic activation of AFB1, and subsequently reduce AFB 1-DNA binding. Our preliminary results obtained from the AFB 1-DNA binding experiments in isolated hepatocytes suggest that the observed age-dependent reduction in AFB 1-DNA binding which may be attributed to a loss of metabolic activating capability was delayed in the diet-restricted rats.

关键词： The Effects of Dietary Restriction and Aging on in Vivo and in Vitro Binding of Aflatoxin B1 to Cellular DNA AFB

Alcohol dependence: Does the composition of the available beverages promote it?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Psychiatry 2012年第4期2卷 301-304页

作者： Mary w. Kuria Yvonne Olando Department of Psychiatry University of Nairobi Nairobi Kenya

Affordability and availability of alcohol are factors that have been associated with alcohol dependence. Ethanol content in the alcoholic beverages is an important determinant in alcohol dependence. Quality control of alcoholic beverages available in the market is important in safeguarding the health of alcohol consumers. Few studies in Kenya have determined the chemical composition of alcohol used by the study participants. Objective: To determine the chemical composition of alcoholic beverages used by a group of alcohol dependent study participants. Design: The study was a clinical trial with pre and post measurements. Method: The CIDI and wHO-ASSIST were administered to 188 alcohol-dependent persons at intake and after six months. A researcher-designed socio demographic questionnaire was also administered at intake. Alcohol beverages were randomly collected from the location of the study area and their chemical composition analyzed using gas chromatography. Results: The mean AUDIT score of the participant was 28.6 for male and 26.6 for females. Three of the alcohol samples collected was illicit brews collected while 11 were licit. Four out of the eleven licit brews had ethanol levels that did not complied with the set government standards. Conclusion: Illicit brews with high ethanol content are available in the Kenyan market, while some of the manufacturers of the licit brew do not comply with government set content recommendations.

关键词： Alcoholic Beverages Ethanol Composition Illicit Licit

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

喧哗与骚动

喧哗与骚动

Kinship promotes affiliative behaviors in a monkey

作者： w.·福克纳(w. Faulkner)

来源：南通市图书馆图书评论

学校读者我要写书评

暂无评论

Current Zoology 2018年第4期64卷 441-447页

作者： Yi REN Kang HUANG Songtao Guo Ruliang PAN Dunn w. DEREK Xiaoguang Ol Xiaowei wANG Chengliang wANG Haitao ZHAO Bin VANG Fangfang LI Baoguo LI Shaanxi Key Laboratory for Animal Conservation and College of Life Sciences Northwest University Xi'an 710069 China Institute of Zoology Shaanxi Academy of Sciences Xi'an 710032 China The School of Anatomy Physiology and Human Biology University of Western Australia Perth 6009 Australia

In social mammals, kinship is an important factor that often affects the interactions among individuals within groups. In primates that live in a multilevel society, kinship may affect affiliative patterns be- tween individuals at different scales within the larger group. For this study, we use field observations and molecular methods to reveal the profiles of how kinship affects affiliative behaviors between indi- viduals in a breeding band of wild golden snub-nosed monkeys （Rhinopithecus roxellana）. we use a novel nonparametric test, the partition Mantel test, to measure independently the correlation between kinship and each of three affiliative behaviors. Our results show that more closely related females are more likely to groom each other. Average relatedness between adult females within the same onemale unit （OMU） is higher than that between adult females from different OMUs. we suggest that closely related females may reside in the same OMU in order to attain inclusive fitness benefits, and that kinship plays an important role in maintaining the social structure of this species.

关键词： golden snub-nosed monkey kinship affiliative behavior partition mantel test

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

十四行诗集

十四行诗集

The Influence of Ski Type on Muscle Activity, Performance, and Self-Efficacy in Young Alpine Ski Racers

作者： w.·莎士比亚(w. Shakespeare)

来源：南通市图书馆图书评论

学校读者我要写书评

暂无评论

Journal of Science in Sport and Exercise 2021年第3期3卷 312-319页

作者： Heidi B.Nunnikhoven Cory Snyder Ronald w.Kipp Michael J.Decker John G.Seifert Movement Science Laboratory Montana State UniversityBozemanMT 59717USA Squaw Valley Ski Team Olympic ValleyCAUSA University of Denver DenverCOUSA Department of Sport and Exercise Science University of SalzburgHallein-RifAustria Athletes Performance Center Red Bull SportsSalzburgAustria

wide skis are the most popular ski sold in the United States and are skied routinely in all types of terrain,especially by young *** study investigated the influence of slalom(SL,64 mm underfoot width)and wide skis(wS,97.7 mm underfoot width)on perceptual responses,timed performance,edge inclination angles,and EMG in young alpine ski *** subjects,mean age 12.8±0.5 years,completed one run on each of two courses which were set to approximate the different turning radii of each *** completed a Likert-type questionnaire to assess components of self-efficacy after each *** activity was recorded on the gluteus medius(GM),vastus lateralis,tibialis anterior and peroneus longus(PL).Per-ceptions of confidence,aggressiveness,speed,and skiing on line were significantly greater,by about 31%,for SL than wS regardless of *** times were significantly less by 4% for SL than wS,peak edge inclination angle was 7%greater for SL than wS,and PL activity was 40% less for SL compared to *** racers are developing skills to improve their racing techniques and are still forming technique strategies to deal with the many factors present in skiing which may disrupt learning *** lower perceptual and performance responses on wS,young ski racers who ski on groomed snow with wS could be interfering with the adaptation of fundamental racing technique at a critical time in their development.

关键词： Alpine skiing Electromyography Ski type Confidence

Prenatal administration of heparin-binding epidermal growth factor-like growth factor in an experimental model of necrotizing enterocolitis decreased both incidence and severity of the disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

world Journal of Pediatric Surgery 2022年第1期5卷 18-24页

作者： Marla Ashley Sacks Yomara Stephanie Mendez Faraz A Khan Robert Propst Craig w Zuppan Christopher G wilson Andrei Radulescu Division of Pediatric Surgery Department of SurgeryLoma Linda University Children's HospitalLoma LindaCaliforniaUSA Department of Pathology Loma Linda University Children's HospitalLoma LindaCaliforniaUSA Department of Neonatology Loma Linda University Children's HospitalLoma LindaCaliforniaUSA

background Necrotizing enterocolitis(NEC)is the leading gastrointestinal cause of death in premature infants and causes long-term ***,enteral heparin-binding epidermal growth factor-like growth factor(HB-EGF)administered after birth demonstrated decreased incidence and severity of NEC in a neonatal animal model of *** investigated the potential prophylactic strategy of preventing NEC using prenatally administered *** An HB-EGF(800μg/kg/dose)dose was injected into pregnant rats via tail vein or intraperitoneal route 2 hours prior to *** cesarean section(C-section)at 21 days’gestation,the rat pups were subjected to the NEC protocol by inducing stressors:hypoxia,hypothermia,hypertonic feeds,and orogastric gavage of lipopolysaccharide(2 mg/kg).Postnatally,pups were monitored for 96 hours and assessed for the development of clinical and postmortem histological *** The experimental NEC incidence in untreated,stressed rat pups was 66%.Compared with untreated pups,the maternal administration of HB-EGF correlated with a significant NEC incidence and severity decrease in rat *** strongest decrease was seen when HB-EGF was administered via the intraperitoneal route 2 hours prior to C-section(66%vs 31%,*pwith the greatest benefit observed in the group that received HB-EGF intraperitoneally 2 hours before *** Prenatal administration of HB-EGF decreases the incidence and severity of NEC,preserves gut barrier function and increases *** may represent a novel prophylactic clinical strategy for NEC offered to mothers at risk of delivering a premature infant.

关键词： severity heparin incidence