Abstract：
:Responses of photosystem I and II activities of Microcystis aeruginosa to various concentrations of Cu(2+) were simultaneously examined using a Dual-PAM-100 fluorometer. Cell growth and contents of chlorophyll a were significantly inhibited by Cu(2+). Photosystem II activity [Y(II)] and electron transport [rETRmax(II)] were significantly altered by Cu(2+). The quantum yield of photosystem II [Y(II)] decreased by 29 % at 100 μg L(-1) Cu(2+) compared to control. On the contrary, photosystem I was stable under Cu(2+) stress and showed an obvious increase of quantum yield [Y(I)] and electron transport [rETRmax(I)] due to activation of cyclic electron flow (CEF). Yield of cyclic electron flow [Y(CEF)] was enhanced by 17 % at 100 μg L(-1) Cu(2+) compared to control. The contribution of linear electron flow to photosystem I [Y(II)/Y(I)] decreased with increasing Cu(2+) concentration. Yield of cyclic electron flow [Y(CEF)] was negatively correlated with the maximal photosystem II photochemical efficiency (F v/F m). In summary, photosystem II was the major target sites of toxicity of Cu(2+), while photosystem I activity was enhanced under Cu(2+) stress.
journal_name
Biol Trace Elem Resjournal_title
Biological trace element researchauthors
Deng C,Pan X,Wang S,Zhang Ddoi
10.1007/s12011-014-0039-zsubject
Has Abstractpub_date
2014-08-01 00:00:00pages
268-75issue
2eissn
0163-4984issn
1559-0720journal_volume
160pub_type
杂志文章abstract：:The interaction of VO2+ with the muchopolysaccharide chondroitin sulfate A (CSA) has been investigated by electron absorption spectroscopy and infrared measurements in aqueous solutions at different pH-values and ligand to metal ratios up to 6:1. The generation of a VO(CSA)2 species could be demonstrated. Coordination...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02990487
更新日期：1994-07-01 00:00:00
abstract：:This paper reports the synthesis of a new bioactive complex, 8-hydroxyquinolinato-bis-(salicylato) yttrium (III) (HSAY), whose composition and structure were characterized by elemental analysis, IR spectra, thermogravimetric analysis, and X-ray diffraction. The power-time curves of the compounds HSAY, C(7)H(6)O(3), C(...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-011-9297-1
更新日期：2012-06-01 00:00:00
abstract：:Comparison of the clastogenic effects of antimony and bismuth used as trioxides, when administered orally by gavaging to laboratory bred male mice, showed that the former was more strongly clastogenic than the latter. Three doses of each chemical (400, 666.67, and 1000 mg/kg body wt), corresponding to 1/50, 1/30, and ...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02783802
更新日期：1993-05-01 00:00:00
abstract：:In this study, eight kinds of nickel (Ni) compounds were orally administered to Wistar male rats and the distribution of each compound was investigated 24 h after the administration. The Ni compounds used in this experiment were nickel metal [Ni-M], nickel oxide (green) [NiO(G)], nickel oxide (black) [NiO(B)], nickel ...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02789001
更新日期：1995-07-01 00:00:00
abstract：:Copper oxide nanoparticles (CuONPs) are widely used in several products and their release into the environment can cause toxicity to major food crops. In this study, toxic responses as a result of CuONPs exposure were studied in soybean (Glycine max L.) seedlings. The plants were grown in 1/2 strength Murashige and Sk...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-014-0106-5
更新日期：2014-12-01 00:00:00
abstract：:Plasma zinc (Zn) concentrations were measured in 4376 indigent women (86% African-American), at at mean (+/- SD) gestational age of 15 (+/- 7.8) wk to determine the relationship between various maternal characteristics and plasma Zn levels during pregnancy. Mean Plasma An levels were lower in African-American women th...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02784174
更新日期：1996-10-01 00:00:00
abstract：:Plasma and erythrocyte lipid peroxidation levels of 20 patients with histopathologically confirmed testis cancer and 20 healthy control individuals were studied between November 1995 and June 1997. The group with testis cancer had a mean age of 24.8+/-8.2 yr and the control group's mean age was 28.3+/-6.9 yr. Stage di...
journal_title：Biological trace element research
pub_type： 临床试验,杂志文章
doi：10.1385/BTER:73:2:181
更新日期：2000-02-01 00:00:00
abstract：:Age-related changes in the concentrations of constituent elements in the brains of rats and mice 1 wk to 24 mo old were determined with inductively coupled plasma-mass spectrometry (ICP-MS) and inductively coupled plasma-atomic emission spectrometry (ICP-AES). Seventeen elements could be determined with reasonable acc...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1385/BTER:80:2:145
更新日期：2001-05-01 00:00:00
abstract：:The onset of Alzheimer's disease has been shown to affect trace element concentrations in the brain when compared to "normal" subjects in ex vivo samples. The techniques used to determine trace element concentrations were proton-induced X-ray emission and instrumental neutron activation analysis. With these methods, s...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02784242
更新日期：1999-01-01 00:00:00
abstract：:This study evaluated the plasma levels of trace elements in children with chronic hepatitis B virus (HBV) infection and assessed whether they can be a factor that affects the response to interferon alpha (IFN-alpha) treatment. The study included 35 cases (ten girls, 25 boys) aged 3-13 years with chronic HBV infection ...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-009-8507-6
更新日期：2010-06-01 00:00:00
abstract：:Results from several medical investigations carried out using the Oxford scanning proton microprobe are presented, including maps of the hepatic copper-distribution in primary biliary cirrhosis and maps of the iron distribution in primary hemochromatosis. Preliminary studies of human nervous tissue reveal that morphol...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02796626
更新日期：1987-08-01 00:00:00
abstract：:Magnesium is the second most abundant intracellular cation and is a fundamental cofactor in a multitude of cellular enzymatic reactions. Magnesium deficiency causes diverse clinical features predominantly due to cardio- and neurotoxicity. We describe a case of severe hypomagnesaemia associated with intermittent downbe...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-010-8757-3
更新日期：2011-08-01 00:00:00
abstract：:In the present study, we investigated the effects of Se-enriched Agaricus blazei Murill (Se-AbM) on liver injury in mice induced by acute alcohol administration. Mice received ethanol (5 g/kg body weight (BW)) by gavage every 12 h for a total of 3 doses. Se-AbM was administrated before ethanol administration. Subseque...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-014-0022-8
更新日期：2014-07-01 00:00:00
abstract：:Studies investigating the effects of Chromium (Cr) supplementation on unstressed broiler chickens have reported an inconsistent association between Cr supplementation and broiler chickens' responses. We conducted a dose-response meta-analysis of previous studies to assess the dose-response associations between Cr supp...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-021-02589-2
更新日期：2021-01-17 00:00:00
abstract：:Two experiments were performed to confirm that boron interacts with calcium, and that this interaction can be modified by dietary magnesium and potassium in the rat. Upon manipulating the dietary variables listed above, it was found that under certain conditions, boron and calcium deprivation similarly affected severa...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02783768
更新日期：1992-12-01 00:00:00
abstract：:The objective of this study was to examine relations between basal metabolic rate (BMR) and cadmium (Cd) accumulation in the liver, kidneys, and duodenum in mice. The 5-month-old mice selected for high (H) and low (L) BMR were exposed for 8 weeks to 0, 10, and 100 μg Cd/mL of drinking water. The H-BMR mice showed sign...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-011-9061-6
更新日期：2011-12-01 00:00:00
abstract：:To better understand the relationship between prenatal exposure to heavy metals and trace elements and the risk of adverse pregnancy outcomes, we investigated the status of heavy metals and trace elements level in a Chinese population by collecting umbilical cord blood. Umbilical cord blood heavy metals and trace elem...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-014-0057-x
更新日期：2014-09-01 00:00:00
abstract：:This study was performed to assess how 4 weeks of magnesium supplementation and exercise affect the free and total plasma testosterone levels of sportsmen practicing tae kwon do and sedentary controls at rest and after exhaustion. The testosterone levels were determined at four different periods: resting before supple...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-010-8676-3
更新日期：2011-04-01 00:00:00
abstract：:Zinc deficiency, which is common among Iranian populations, is believed to play a crucial role in the onset and progression of mood disorders such as depression in different stages of life. We have therefore investigated the relationship between serum/dietary zinc status and depression scores among adolescent girls li...
journal_title：Biological trace element research
pub_type： 杂志文章,随机对照试验
doi：10.1007/s12011-018-1301-6
更新日期：2018-11-01 00:00:00
abstract：:Ferritin levels have been associated with metabolic syndrome and insulin resistance. The aim of the present study was to evaluate the prediction of ferritin levels by variables related to cardiometabolic disease risk in a multivariate analysis. For this aim, 123 healthy women (72 premenopausal and 51 posmenopausal) we...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-012-9351-7
更新日期：2012-08-01 00:00:00
abstract：:The aim of this study was to trace zinc nanocrystals in the anterior pituitary of zinc-deficient Wistar rats by using autometallographic technique. Male Wistar rats (30-40 days of age, pre-pubertal period) of 40-50 g body weight were divided into the following: the ZC (zinc control) group-fed with 100 ppm zinc in diet...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-016-0881-2
更新日期：2017-06-01 00:00:00
abstract：:Three kinds of plant leaves, Chinese white aspen, arborvitae, and pine needles, have been sampled from the Yanshan Oil refinery complex, the Capital Iron and Steel Factory, and Badachu, a control area in Beijing, as biomonitors for air-pollution studies. Each sample was divided into two parts, washed, and unwashed. Th...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02784212
更新日期：1999-01-01 00:00:00
abstract：:Colon cancer in men and breast cancer in women are regarded as major health burdens, accounting for majority of cancer diagnoses globally. Doxorubicin (DOX) resistance in breast and colon cancers represents the main reason of unsuccessful therapy. The rationale of this study is to explore whether selenium nanoparticle...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-019-01730-6
更新日期：2020-02-01 00:00:00
abstract：:Chromium (Cr), manganese (Mn), copper (Cu), zinc (Zn), and iron (Fe) concentrations were quantified in serum (n = 112), milk (n = 112), liver (n = 70), and kidney samples (n = 67) of dairy cows from an iron-steel processing region (Payas-Iskenderun) and from an area free of industrial pollution (Antakya) in Hatay, loc...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1385/BTER:98:1:51
更新日期：2004-04-01 00:00:00
abstract：:The effects of lanthanum on heat production of mitochondria isolated from Wistar rat liver were investigated with microcalorimetry; simultaneously, the effects on mitochondrial swelling and membrane potential (Δψ) were determined by spectroscopic methods. La(3+) showed only inhibitory action on mitochondrial energy tu...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-015-0269-8
更新日期：2015-09-01 00:00:00
abstract：:To examine longitudinal and gestational effects of mineral content in human milk, we analyzed human milk from lactating mothers of premature (PRT, n = 24, < 2000 g birth weight, < 37 wk gestation) and full-term (FT, n = 19, > 2500 g, 39-41 wk gestation), living in Newfoundland, Canada. Samples were collected once a we...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02784423
更新日期：1999-03-01 00:00:00
abstract：:The purpose of the study was to determine the concentration of trace elements in serum samples of women who are chronic users of skin-whitening agents as well as the hepatic and renal effects of these agents on these women. The study was conducted among 23 skin-whitening users while 25 women served as the controls. Th...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-011-8962-8
更新日期：2011-12-01 00:00:00
abstract：:Trace elements can influence dental health, possibly by altering tooth resistance during preeruptive development. Therefore, it was investigated whether lead and fluoride would be incorporated into the calcifying matrices or the cellular parts of tooth germs in vitro. Using laser microprobe mass analysis, the localiza...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02917184
更新日期：1989-01-01 00:00:00
abstract：:X-ray fluorescence experiments at the Photon Factory in Japan are described. An energy-dispersive X-ray fluorescence system was combined with various excitation modes, i.e., a continuum and a monochromatic excitation, which consist of a crystal monochromator or a wide band pass monochromator. These excitation modes pr...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02796677
更新日期：1987-04-01 00:00:00
abstract：:Antagonistic interactions between silicon and aluminum occur in living organisms. Thus, an experiment was performed to ascertain whether high dietary aluminum would accentuate the signs of silicon deprivation in rats and conversely whether silicon deprivation would accentuate the response to high dietary aluminum. The...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02917430
更新日期：1994-06-01 00:00:00
