نتایج جستجو برای: pb

تعداد نتایج: 36420  

Journal: :Tree physiology 1996
J Hagemeyer T Weinand

Concentrations of Pb in individual stem xylem rings of 5-year-old Norway spruce trees (Picea abies (L.) Karst.) were determined after one growing season in soil containing a low, medium or high concentration of Pb. In trees in the control and low-Pb soil treatments, Pb concentrations increased from the outer annual rings toward the stem center, whereas in trees grown in the soil treatment conta...

2016
Heike Zander Laurence Claes Eva M. Voth Martina de Zwaan Astrid Müller

Aim To investigate impulsive behaviors in pathological buying (PB). Methods The study included three groups matched for age and gender: treatment seeking outpatients with PB (PB+), treatment seeking psychiatric inpatients without PB (PB-), and a healthy control group (HC). PB was assessed by means of the Compulsive Buying Scale and by the impulse control disorder (ICD) module of the research ve...

2007
Amy M. Gaffney Lars E. Borg Yemane Asmerom

The results of our combined U–Pb, Rb–Sr, and Sm–Nd isotope study of mare basalt 10017 contribute to the understanding of the petrogenetic processes involved in the origin of geochemical diversity in lunar mare basalt sources, as well as the U–Pb isotope systematics of the Moon. The Rb–Sr, Sm–Nd, and U–Pb isotope systems yield concordant crystallization ages of 3.633 ± 0.057 Ga, 3.678 ± 0.069 Ga...

Journal: :The Journal of pediatrics 2015
Michael Macknin Tammie Kong Adam Weier Sarah Worley Anne S Tang Naim Alkhouri Mladen Golubic

OBJECTIVE To perform a randomized trial to determine whether there is cardiovascular disease (CVD) risk reduction from a plant-based (PB), no-added-fat diet and the American Heart Association (AHA) diet in children. STUDY DESIGN A 4-week (April 20, 2013 to May 18, 2013), prospective randomized trial was undertaken in a large, Midwestern hospital system's predominantly middle class outpatient ...

Journal: :The Science of the total environment 2003
Xinde Cao Lena Q Ma Ming Chen Donald W Hardison Willie G Harris

The use of lead bullets and shot at shooting ranges is under increasing scrutiny as a potentially significant source of Pb pollution. This study assessed Pb contamination in the soils of two shooting ranges (TRR and MPR) in Florida. Soil samples were collected from the two ranges and analyzed for total Pb to determine Pb contamination. Selected spent bullets and berm soil samples were mineralog...

Journal: :Environmental pollution 2000
Y Dong L Q Ma R D Rhue

It is well documented that Pb solubility may be related to Fe chemistry in soils and enhanced Pb solubility may occur under certain reducing conditions; however, quantification of such relationships is unavailable. Based on metal classification, Pb (II) and Fe (II) are similar in some chemical characteristics. Thus, competition between Pb and Fe for ligands in soils may be important in determin...

Journal: :Journal of environmental monitoring : JEM 2005
Susan I Vinogradoff Margaret C Graham Gareth J P Thornton Sarah M Dunn Jeffrey R Bacon John G Farmer

As a consequence of the accumulation of anthropogenic Pb in upland catchments, there has been much recent concern about the potential mobilisation and transport of Pb from the soils to receiving waters and also the possible harmful effects that this might have on aquatic biota. This paper presents the findings of a two-year study of Pb behaviour in an organic-rich upland catchment at Glensaugh ...

Journal: :Computers & Geosciences 2006
David R. Nelson

A Visual Basic program for flexible, interactive processing of ion-microprobe data acquired for quantitative trace element, Al–Mg, Mn–Cr, Fe–Ni and U–Th–Pb geochronology applications is described. Default but editable run-tables enable software identification of secondary ion species analyzed and for characterization of the standard used. Counts obtained for each species may be displayed in plo...

2003
Lena Qiying Ma

The effects of Ca, K, Na, calcite, and EDT A on Pb immobilization by hydroxyapatite [CaIO(P04)6(OHh; HAl were investigated. The stability of hydroxy pyromorphite [PbIO(P04MOHh; HPJ (a reaction product of HA with Pb) and the effectiveness of using HA to immobilize Pb in Pb-contaminated soils also were examined. Neither Na nor K affected Pb immobilization. Aqueous Ca and calcite slightly inhibite...

Journal: :Industrial health 2007
Fengyuan Piao Fanyin Cheng Haibo Chen Gang Li Xiance Sun Shuang Liu Toru Yamauchi Kazuhito Yokoyama

In order to investigate the effects of Zn on Pb toxicities. Proportion of abnormal sperm, percentage of micronucleated polychromatic erythrocyte (MPCE), serum thyroid hormones (T(3), T(4)) and cortisol were measured. Rats received intraperitoneal injection of 25 mg/kg Pb acetate, 4 mg/kg Zn acetate, both Pb acetate and Zn acetate, or normal saline as controls, once every two days, 7 times in to...

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