properties of heavy metal

Overview

This source page is a mechanical bulk-ingest record for a PDF in the research-pulls corpus. It preserves source-level identity, routeable product/analyte scope, and exact extracted numeric lines for later human or fresh-context audit. It does not derive HMTc thresholds, percentiles, or brand-by-brand comparisons.

Key numbers

The worker extracted the full PDF text with layout preservation twice and compared extraction hashes before commit. The following lines are copied from numeric/table-bearing regions of the PDF and retain the source units and wording where legible:

disease and thyroid cancer in recent decades (11, 44). MeHg In mice treated with MeHg chloride (2 mg/kg) for more than 2
increases steadily after the age of 20, reaching 90% or more in those reproductive system. MeHg is also linked to metabolic homeostasis
depression-like behavior (Table 1). Gimé nez-Llort et al. (56), Daré no differences in body weight were observed. Motor performance
motor coordination (Rotarod Test), but male offspring exhibited dose of MeHg (8 mg/kg at GD 8) impaired exploratory activity,
behavior, along with a persistent predisposition to depressive-like pups born to dams treated with MeHg on GD 15 (4 mg/kg). They
predisposition to depressive-like behavior in males exposed to insult. In cultures from the 8 mg/kg exposure group, the damage
TABLE 1 MeHg perinatal exposure schemes.
Wistar rats 5 ppm MeHg, oral route by diet female rats)
4, 6, or 8 ppm MeHg/kg, oral route by 6 weeks (PND 42) Goulet et al.
0.5, or 6.5 ppm MeHg, oral route by
Long-Evans rats 0.5 ppm MeHg, oral route by drinking water PND 60
Male 1 ppm, or 3 ppm MeHg in a5 nM During mating (male and female
C57BL/6Cr mice 5 ppm MeHg, oral route by diet and lactation (until PND 30) (only 10, 12, 14 and 16.
0.5 mg/kg/day or 2.0 mg/kg/day (estimated), Gralewicz
to 8 mg/kg of MeHg. This correlation was not detected in the 4 mg/ panic, and depression in both male and female rats evaluated at
kg group. In addition, the higher dose exposure was linked to PND 60 following prenatal exposure to MeHg (8 mg/kg, GD 15).
general toxicity, including increased mortality at birth and reduced Sakamoto et al. (58) demonstrated that a diet containing 5 ppm
using 4, 6, or 8 ppm MeHg in the drinking water to dams from GD 2 whole-brain Hg concentrations (ng/g) in offspring measured at PND
until PND 21, did not observe impairments in motor coordination 41: Ctrl male group = 5.3 ± 1.8; 0.5 mg/kg/day male group = 20.2 ±
learning at PND 42 (Rotarod Test). However, they reported 1.6; 1.0 mg/kg/day male group = 58.2 ± 3.6; Ctrl female group = 9.2 ±
signiﬁcant alterations in spontaneous locomotion and rearing 3.5; 0.5 mg/kg/day female group = 34.6 ± 3.2; 1.0 mg/kg/day female
et al. (62) examined offspring of dams exposed to 0.5 ppm MeHg in adult offspring developmentally exposed to chronic, low-dose
0.5 or 6.5 ppm MeHg in the drinking water from 4 weeks before Water Maze at 6 months. Except for rearing behavior in the Open-
1 ppm perinatal exposure group). In addition, running in a wheel to observed in the Morris Water Maze, independent of the impaired
reduced in the 3 ppm lifetime exposure group at 5 months. Using the maze was comparable between exposed and control mice.
to 5 ppm of MeHg in female mice, beginning 4 weeks before mating maternal behavior remains limited. Carratù et al. (65) described no
preweaning developmental changes (Grasp Reﬂex and Negative MeHg (8 mg/kg) on GD 8 or 15. Reproductive parameters evaluated
administered daily subcutaneous injections of MeHg (7 mg/kg 61–63), the dams and pups’ toxicological parameters evaluated
Mechanistically, Pb can act as a metalloestrogen, mimicking at PND 7 and 14. BLLs at PND 7 ranged from 5.7 to 36.5 μg/dL.
however, is inconclusive, with studies reporting positive, negative, In male offspring exposed to 0.2% Pb in drinking water under
Environmental Pb exposure is linked to a higher risk of type 2 BLLs at PND 22 ranged from 3.03 to 31.59 μg/dL (129). Learning
TABLE 2 Pb perinatal exposure schemes.
10 mg/kg Pb acetate Groups:
Wistar 0.2% Pb acetate, oral and anxiety testing) Jaako-Movits
8, 16 and 24 mg/kg Pb Groups: PND 7
27 (0.005%, low) or 55 Postnatal Lead Exposure (PLE) model: PND 0 - 21
BALB/ 20 ppm (0.1 mM Pb to exploratory/anxiety
Long 1500 ppm Pb acetate, Anderson
300 ppm Pb acetate,
TABLE 2 Continued
0.2% Pb acetate added Gestation lead exposed (G): GD 1 - 21
0.2% Pb acetate added Gestation lead exposed (G): GD 1 - 21

Methods (brief)

epigenetic changes in human and experimental models (164–166) biological samples over time, thereby limiting translational
development. Int J Occup. Med Environ Health. (2015) 28:533–44. doi: 10.13075/ 141. Tinkov AA, Filippini T, Ajsuvakova OP, Aaseth J, Gluhcheva YG, Ivanova JM,
1. Mai W, Peng D, Wu L, Gao N, Zhang X, Zhang R, et al. Maternal cadmium 178. Goodman CV, Green R, DaCosta A, Flora D, Lanphear B, Till C. Sex difference of

Implications

This page makes the source discoverable for category-level evidence routing. Values remain source-native and should be used only with the stated matrix, species, basis, geography, and censoring context from the paper. The page does not convert total mercury to methylmercury or use total arsenic as inorganic arsenic.

Wiki pages this source may touch

Verification notes

Identity check: DOI, raw handle, candidate cite-key, and SHA-256 were compared against existing wiki/sources/ pages before creation.
Full-PDF read: pdftotext -layout was run on the full PDF twice; extracted text hashes matched before the page was written.
Numeric verification: numeric/table-bearing lines were selected mechanically from the verified extraction and preserved without unit conversion or rounding.
Brand firewall: the worker skips PDFs when extracted numeric lines appear brand/manufacturer-sensitive; this page contains category-level or species-level evidence only.
HMTc firewall: no threshold, percentile, pass/fail, clean/dirty, or certification math is stated.

Update history

The five most recent substantive edits to this page, classified major (evidence or structure moved), correction (a published value or statement was wrong and has been fixed), or minor (narrative rewritten without changing the underlying evidence). Each description is derived from what the edit did to this page; the linked commit is the authoritative record, routine regeneration passes are excluded, and the full version history lives in git. When DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.

Commit	Date	Change	Description
b01ec52c	2026-08-04	major	2 sections added
d49e450f	2026-08-03	major	5 sections added; narrative text revised