vulgaris, only a faint, 2 3 kb fragment was visualized in Souther

vulgaris, only a faint, 2.3 kb fragment was visualized in Southern experiments. Moreover, in Mesoamerican accessions, two other fragments (1.7 kb and 3.4 kb) were strongly labelled as well. Taken together, our selleck products results indicate that PvMeso is a recently emerged, repeat family initially duplicated in chromosome 11, on ancestral Mesoamerican accession, and later amplified

in chromosome 7, after the split of the two major gene pools of the common bean.”
“Although previous studies have demonstrated that BMP9 is highly capable of inducing osteogenic differentiation of mesenchymal stem cells, the molecular mechanism involved remains to be fully elucidated. In this study, we showed that BMP9 simultaneously promotes the activation of Smad1/5/8, p38 and ERK1/2 in C3H10T1/2 cells. Knockdown of Smad4 with RNA interference reduced nuclear translocation of Smad1/5/8, and disrupted BMP9-induced osteogenic differentiation. BMP9-induced osteogenic differentiation was blocked by p38 inhibitor SB203580, whereas enhanced by ERK1/2 RSL 3 inhibitor PD98059. SB203580 decreased

BMP9-activated Smads singling, and yet PD98059 stimulated Smads singling in C3H10T1/2 cells. The effects of inhibitor were reproduced with adenovirus expressing si RNA targeted p38 and ERK1/2, respectively. Taken together, our findings revealed that Smads, p38 and ERK1/2 are involved in BMP9-induced osteogenic differentiation. Also, it is noteworthy that p38 and ERK1/2 may play opposing regulatory MEK162 cost roles in mediating BMP9-induced osteogenic differentiation of C3H10T1/2 cells. [BMB reports 2012; 45(4): 247-252]“
“Background: Patients with thalassemia major (Thal) frequently have low plasma zinc, which has been associated with low bone mass.\n\nObjective: The objective was to determine the effect of zinc supplementation on bone mass in patients with Thal.\n\nDesign: Forty-two subjects (21 females aged 10-30 y) with Thal and low bone mass were randomly assigned to receive 25 mg Zn/d or placebo. Bone mineral content (BMC) and areal bone mineral density (aBMD) were assessed by using dual-energy X-ray absorptiometry, and fasting blood was collected for the measurement

of plasma zinc at 0, 12, and 18 mo.\n\nResults: Thirty-two subjects, 81% of whom were transfusion dependent, completed the study (mean +/- SD: 17.1 +/- 5.2 y). Plasma zinc was <= 70 mu g/dL in 11 subjects at baseline and increased significantly with zinc supplementation (P = 0.014). Use of intention-to-treat analysis and linear models for longitudinal data, adjusted for baseline and pubertal stage, showed that the zinc group had significantly greater increases in whole-body BMC (adjusted mean +/- SE: 63 +/- 15 g; P = 0.02), and aBMD (0.023 +/- 0.006 g/cm(2); P = 0.04) than did the placebo group after 18 mo. Furthermore, adjusted spine and hip aBMD z scores each decreased by 0.3 SDs (both P = 0.04) in the placebo compared with the zinc group over the 18-mo study.

The HH131 genotype was significantly associated with dengue disea

The HH131 genotype was significantly associated with dengue disease, either DF (*P = 0.016; odds ratio = 4.425; 95% confidence interval = 1.10-20.52) or DHF (P = 0.00018; odds ratio = 10.56; 95% confidence interval = 2.33-54.64) with respect to the subclinical infection.”
“Background: Resveratrol (3,49,5-trihydroxystilbene) is a naturally occurring product found in numerous plants. Among its biologic properties, resveratrol may promote immunomodulatory effects on the host response. This study investigates the effect of continuous AZD5363 research buy administration of resveratrol on the progression of experimental periodontitis in rats.\n\nMethods: Periodontitis was induced in rats in one of the

first molars chosen to receive a ligature. Animals were assigned to one of two groups: 1) daily administration of the placebo solution (control selleck screening library group) or 2) 10 mg/kg resveratrol (RESV group). The therapies were administered systemically for 30 days: for 19 days before periodontitis induction and then for another 11

days. Then, the specimens were processed for morphometric analysis of bone loss, and the gingival tissue surrounding the first molar was collected for quantification of interleukin (IL)-1 beta, IL-4, and IL-17 using a multiplexing assay.\n\nResults: Intergroup comparisons of the morphometric outcomes revealed higher bone loss values in ligated molars and unligated teeth in the control group than the RESV group (P < 0.05). The immunoenzymatic assay of the gingival tissue showed a lower concentration of IL-17 in the RESV group than the control group (P < 0.05), whereas no differences in the IL-1 beta and

IL-4 levels of the groups were observed (P > 0.05).\n\nConclusions: Continuous administration of resveratrol may decrease periodontal breakdown induced experimentally Blasticidin S order in rats. In addition, lower levels of IL-17 were found in the RESV group. Future studies are important to confirm the mechanism through which resveratrol exerts its effects.”
“In a frog neuromuscular preparation of m. sartorius, glutamate had a reversible dose-dependent inhibitory effect on both spontaneous miniature endplate potentials (MEPP) and nerve stimulation-evoked endplate potentials (EPP). The effect of glutamate on MEPP and EPP is caused by the activation of metabotropic glutamate receptors, as it was eliminated by MCPG, an inhibitor of group I metabotropic glutamate receptors. The depression of evoked EPP, but not MEPP frequency was removed by inhibiting the NO production in the muscle by L-NAME and by ODQ that inhibits the soluble NO-sensitive guanylyl cyclase. The glutamate-induced depression of the frequency of spontaneous MEPP is apparently not caused by the stimulation of the NO cascade. The particular glutamate-stimulated NO cascade affecting the evoked EPP can be down-regulated also by adenosine receptors, as the glutamate and adenosine actions are not additive and application of adenosine partially prevents the further decrease of quantal content by glutamate.

Each diet was fed ad libitum to eight replicates consisting of si

Each diet was fed ad libitum to eight replicates consisting of six birds in each pen from 1 to 42 days of age. Body mass gain and feed efficiency at 21 and 42 days of age and relative mass of liver, abdominal fat, and ready to cook yields at 42 days of age were not affected (P > 0.05) by supplementing organic Cr in broiler diet. Body mass loss during pre-slaughter holding period (12 h) reduced and relative

breast mass increased nonlinearly (P < 0.01) with concentration of Cr in diet. Lipid peroxidation BAY 57-1293 decreased, while activities of glutathione peroxidase and glutathione reductase in plasma increased nonlinearly with Cr supplementation. The ratio between heterophyl and lymphocyte was not affected (P > 0.05) with Cr supplementation in broiler diet. Relative mass of lymphoid organs (bursa, spleen, and thymus) and antibody production to Newcastle disease vaccination were not affected (P > 0.05) by the treatments employed. The cell-mediated immunity (lymphocyte proliferation ratio) increased nonlinearly

with dietary Cr concentration. The results of the present study indicated that supplementation of organic Cr did not influence body mass and feed efficiency. However, supplementation of the Cr reduced pre-slaughter holding losses, increased the relative mass of breast, and increased antioxidant status and lymphocyte proliferation in broilers reared in tropics.”
“Background: Obesity is hypothesized AZD6094 order to involve immunoinflammatory alterations, and the condition has been NVP-BSK805 molecular weight related to increased susceptibility to periodontitis. The present study analyzed the association between overweight/obesity and periodontitis assessed as clinical attachment loss (AL) and bleeding on probing (BOP) in a cross-sectional design.\n\nMethods: Participants included 878 women and 719 me aged 20 to 95 years (participation rate 54%) who underwent an oral examination, including full-mouth recording of clinical AL and BOP. Overweight and obesity were assessed by body mass index (BMI) using the World Health Organization criteria. BMI

was related to clinical AL (defined as mean 3 mm) and BOP (defined as >= 25%) by multivariable logistic regression in the total population and in subjects stratified by gender and smoking habits.\n\nResults: Obese participants had a lower odds ratio (OR) for clinical AL compared to participants with normal weight (OR: 0.60; 95% confidence interval [CI]: 0.36 to 0.99). The same tendency was observed in subjects stratified by smoking habit. Obese never-smokers had a lower OR for clinical AL compared to never-smoking participants with normal weight (OR: 0.32; 95% CI: 0.11 to 0.91). Overweight participants had a higher OR for BOP compared to subjects with normal weight (OR: 1.36; 95% CI: 1.04 to 1.78). In addition, overweight never-smokers had a higher OR for BOP compared to normal weight never-smokers (OR: 1.63; 95% CI: 1.03 to 2.59).

Various forms of recombinant human sCD93 were used to investigate

Various forms of recombinant human sCD93 were used to investigate the effects

of this molecule on both human primarymonocytes and a monocytic cell line, THP-1. We found that sCD93 induced differentiation of monocytes to macrophage-like cells, as evidenced by activated cell adhesion and increased phagocytic activities. In addition, this differentiation resulted in an enhanced ALK activation response to TLR stimulation in terms of differentiation marker expression and proinflammatory cytokine production. Furthermore, sCD93 enhanced LPS-stimulated TNF-alpha production even prior to monocyte differentiation. To investigate a possible role for sCD93 in the pathogenesis of chronic inflammatory diseases, we assessed the concentration selleck chemicals llc of sCD93 in synovial fluid from patients with rheumatoid arthritis and found it to be significantly increased compared with synovial fluid from patients with osteoarthritis. Together, these data revealed a function for sCD93 that may have implications in inflammation and inflammatory diseases including rheumatoid arthritis. The Journal of Immunology, 2010, 185: 4921-4927.”
“Infantile hemangiomas (IHs) are common neoplasms composed of

proliferating endothelial-like cells. Despite the relative frequency of IH and the potential severity of complications, there www.selleckchem.com/products/VX-770.html are currently no uniform guidelines for treatment. Although propranolol has rapidly been adopted, there is significant uncertainty and divergence of opinion regarding safety monitoring, dose escalation, and

its use in PHACE syndrome (PHACE = posterior fossa, hemangioma, arterial lesions, cardiac abnormalities, eye abnormalities; a cutaneous neurovascular syndrome characterized by large, segmental hemangiomas of the head and neck along with congenital anomalies of the brain, heart, eyes and/or chest wall). A consensus conference was held on December 9, 2011. The multidisciplinary team reviewed existing data on the pharmacologic properties of propranolol and all published reports pertaining to the use of propranolol in pediatric patients. Workgroups were assigned specific topics to propose protocols on the following subjects: contraindications, special populations, pretreatment evaluation, dose escalation, and monitoring. Consensus protocols were recorded during the meeting and refined after the meeting. When appropriate, protocol clarifications and revision were made and agreed upon by the group via teleconference. Because of the absence of high-quality clinical research data, evidence-based recommendations are not possible at present.

The present study was performed to elucidate, specifically, cliva

The present study was performed to elucidate, specifically, clival canals of the occipital portion of the clivus.\n\nOne hundred dry skulls (80 adult and 20 children) and 47 adult cadavers were included, and the superior and inferior surfaces of their clivus were inspected for bony defects/canals. When identified, the canals were measured and their potential contents removed. The contents of the canals in these cadaveric specimens were submitted for histological analysis.\n\nA

canal of the clivus was identified in 5% of dry specimens and in 6.4% of cadaveric specimens. One diagonal and five more or less vertical canals were found. One canal PXD101 in vivo was observed to have a single opening and one canal was found to have

three openings. For the cadaveric canals, histology of the contents revealed no pituitary or notochordal tissue with only vascular anatomy consistent with veins. These venous structures appeared to connect parts of the basilar venous plexus.\n\nBased on our study, which is the first of see more its kind, such canals of the occipital portion of the clivus should not be mistaken for pathology and represent simple vascular channels.”
“Changes in the spacing of hexagonally packed cylinders in a poly(styrene-b-butadiene) copolymer film during the continual extraction of toluene under different solvent removal conditions were studied by in situ small-angle X-ray scattering (SAXS) measurements. As the solvent is removed from the film, the structure spacing increases due to increasing segregation power and then decreases as the polymer chains become kinetically trapped while microdomains continue Buparlisib ic50 to deswell. The structure spacing in the

vertical film direction decreases more drastically due to compression of the domains as the film thickness decreases. The degree of compression increased with increased polymer concentration because of an increase in the chain relaxation time. Increasing the drying temperature resulted in more severe domain compression, which is ascribed to faster solvent removal. Removing solvent in the presence of a sweep gas further increased the domain compression as a result of the formation of a skin at the film surface. When the solvent removal rate was decreased and skinning was avoided by saturating the sample chamber with the casting solvent, domain compression was impeded.”
“Microglia, the macrophages of the central nervous system parenchyma, have in the normal healthy brain a distinct phenotype induced by molecules expressed on or secreted by adjacent neurons and astrocytes, and this phenotype is maintained in part by virtue of the blood-brain barriers exclusion of serum components. Microglia are continually active, their processes palpating and surveying their local microenvironment.


“In altricial and semi-altricial species, asynchronous hat


“In altricial and semi-altricial species, asynchronous hatching gives the first chicks to hatch an initial advantage over other siblings and often leads to the elimination of the smallest chicks. Both baseline corticosterone and acute stress-induced corticosterone levels have been shown to be higher in food deprived chicks than in chicks fed ad libitum. However, Volasertib in vitro first-hatched chicks have also been shown to exhibit higher corticosterone levels than last-hatched chicks, suggesting an influence of the initial differences between eggs on corticosterone levels. We subjected single-chicks of southern rockhopper penguins

Eudyptes chrysocome chrysocome to a standardised capture-stress protocol. In this

species having very dimorphic two-egg clutches, we examined whether corticosterone levels were different between the two chick categories and tested for the effect of body condition controlled by the chick category. Neither body sizes, nor corticosterone levels differed between A- and B-chicks at 18 days. In contrast to baseline corticosterone levels, acute stress-induced levels of corticosterone were negatively correlated to body condition: chicks with a good body condition had lower acute stress-induced levels of corticosterone than chicks with a poor condition, whatever the chick category. ABT-737 order Our results do not support the idea that initial differences in egg characteristics could drive the difference in corticosterone Lapatinib clinical trial levels between siblings. On the contrary, they show that the A-egg of rockhopper penguins has, when reared

alone, the same intrinsic potential to develop into a fledged chick as the B-egg. Later differences in body condition appear to lead to variation in the acute stress-induced levels of corticosterone. (C) 2010 Elsevier Inc. All rights reserved.”
“In this study, a mineralized collagen coating was electrolytically deposited onto titanium. The results showed that the mineralized collagen coatings with dense or porous morphology could be obtained. The mineral phase was mainly hydroxyapatite. In vitro evaluation showed the mineralized collagen coatings were stable in Kokubo’s simulated body fluid, and displayed a good cytocompatibility in the cell multiplication test. The mineralized collagen coatings loaded with vancomycin hydrochloride showed an inhibitory effect on the growth of S. aureus. The present mineralized collagen coating demonstrates good suitability for surface modification of orthopedic metal implants.”
“The multi-regional clinical trials (MRCTs) being administered in different regions of the world now play a major role in providing evidence for the efficacy and safety of new drugs amidst the simultaneous global development and worldwide registration of such drugs, in support of the expeditious availability of medical products to patients.

33 +/- 0 85 Delta E were evidenced in used endotracheal tubes, as

33 +/- 0.85 Delta E were evidenced in used endotracheal tubes, as compared to virgin samples (p < 0.0001). Chromatic changes

were independent from intubation duration. DSC and TGA analyses showed a loss of DEHP from used tubes, as indicated by increase of the glass transition temperature Wnt inhibitor (Tg) and DEHP weight loss. In vivo application of tubes was associated with an aging process whose effects on the optical and spectral properties were similar to those observed following artificial aging processes. Conclusions: Our findings indicate that significant spectrocolorimetric, DSC and TGA changes occur in endotracheal tubes after application, thus demonstrating for the first time the occurrence of in vivo materials degradation and DEHP leakage from medical devices worldwide used for neonatal ventilation. Copyright (c) 2008 S. Karger AG, Basel”
“Background. Survivin is a member of the inhibitors of apoptosis protein AG-881 cost family that plays an important role in carcinogenesis. Here, we examined the association between survivin expression and clinical outcome in urothelial carcinoma of the bladder (UCB). Methods. A total of 56

histopathologically confirmed UCB patients were recruited from the Department of Urology of Chiayi Christian Hospital from August 2007 to May 2009. Immunohistochemistry (IHC) was used to detect the survivin expression in tumor tissues. The -31 C/G polymorphism in survivin promoter region was determined by polymerase chain reaction-restricted fragment length

polymorphism. Results. The frequency of high survivin expression was significantly higher in muscle-invasive tumors (66.6%) than in non-muscle-invasive tumors (34.2%) (P = 0.042) and in poorly differentiated (85.7%) tumors than in moderately differentiated tumors (30.8%) (P = 0.0014). The higher frequency of risk genotypes (C/C and C/G) was found in the median (72.7%) and high (68.0%) survivin expression groups. The multivariate analysis showed that a high survivin expression level was a potential predictive biomarker of poor overall survival (P = 0.02). Conclusion. Our results suggest that the high survivin expression was associated with tumor stage and grade and may present a predictive marker of overall survival in UCB.”
“Two, novel, tetradentate Schiff-base ligands. namely bis-5-phenylazosalicylaldehyde diethylenetriimine and bis-5-[(4-methoxyphenyl)azo]salicylaldehyde diethylenetriimine, as well check details as their Cu(2+), Ni(2+), and VO(2+) complexes, were synthesized and characterized using elemental analysis, infrared and also UV-Visible spectroscopy, (1)HNMR and mass spectra. The thermal stability of the free ligands and the related metal complexes, as determined using differential scanning calorimetry and thermal gravimetric analysis, were found to be thermally stable upto 240-275 degrees C depending on the type of ligand and the central metal atom. The lambda(max) of the ligands and their transition metal complexes in the region 300-800 nm are discussed.

When dosimetry is required on the periphery, best results were ob

When dosimetry is required on the periphery, best results were obtained using close refractive matching and ART. A concern for water or dry-scanning is the increase in required detector size, introducing potential cost penalties for manufacturing. (c) 2013 American Association of Physicists in Medicine.”
“Brucellosis is a global disease of domestic and wild mammals

that is caused by intracellular bacteria of the genus Brucella. Although humans are not a natural reservoir for Brucella, infection in the human population is common in many countries, and brucellosis is one of the most common zoonotic infections. Brucella species have evolved to avoid the host’s ABT-737 datasheet immune system and infection is usually characterized by long-term persistence of the bacteria. One important Brucella virulence factor for intracellular survival and persistence in the host is the type IV secretion system. This review will discuss the Brucella type IV secretion system in detail, including current knowledge of architecture and regulation, as well as the newly identified effector substrates that this system transports into host cells.”
“Background: Pigmented villonodular synovitis

(PVNS) of the ankle is a rare benign proliferative growth of the synovium. Studies of the radiologic characteristics of ankle PVNS are sparse.\n\nMethods: To characterize the radiologic features of ankle PVNS, five patients with histologically proven ankle PVNS were retrospectively studied.

The features of their radiographs, computed learn more tomographic scans, and magnetic resonance images were reviewed, with emphasis on the morphological features, extension, margin, bone involvement, signal intensity, and degree of magnetic resonance enhancement.\n\nResults: All five lesions were diffuse, affecting the ankle Blebbistatin manufacturer and distal tibiofibular joint; three lesions also involved the subtalar joint. Radiography demonstrated extrinsic bone erosions with marginal sclerosis of the involved joints in all of the patients, but computed tomography identified this much better than did radiography. Magnetic resonance imaging revealed multiple lobulated soft-tissue masses in all of the cases. These soft-tissue masses surrounded the flexor hallux longus tendon and were hypointense on T1-weighted images, with a heterogeneous signal in two cases and homogenous hypointensity in three cases on fat-suppressed T2-weighted images. In one patient who underwent gadolinium-enhanced imaging, the masses showed intense enhancement.\n\nConclusions: Magnetic resonance imaging is the best way to reveal ankle PVNS. Magnetic resonance imaging findings of predominant hypointensity on all pulse sequences and standard radiography findings of bone erosion with marginal sclerosis are characteristic.

microdonta Ferguson, O serca Viereck, and Sphaeropthalma

microdonta Ferguson, O. serca Viereck, and Sphaeropthalma

mendica (Blake), were found to be more abundant in non-sand dune habitats. The diversity of velvet ants found at AMNWR was compared to the diversity of velvet ants found at the Nevada Test Site (NTS) located approximately 25 mile northeast of Ash Meadows. This comparison identified six velvet ant species that occurred at the NTS, but were not found at AMNWR. The status of Photopsis nana Ashmead 1896 is reinstanted. New synonymy is proposed for Photopsis nana Ashmead 1896 (=Mutilla acontius Fox, 1899, syn. nov.). Diagnoses and a key are provided for the velvet ants of PF-562271 datasheet AMNWR. The hitherto unknown female of Sphaeropthalma megagnathos Schuster is described, and an updated key to the females is provided for S. imperialis species-group. Lectotypes are designated for twelve species.”
“Objective: The objective

of this pilot study was to determine the effect of a supervised short-term exercise trial on exercise adherence in a sample of African American males.\n\nMethods: We observed exercise adherence rates among a group of African American men in response to an exercise intervention. Exercise adherence was determined by dividing the total number of actual sessions attended by the total number of possible sessions (12 sessions). A participant was classified as an adherer if they completed 9 out of 12 exercise sessions (75%).\n\nResults: Seventy-one percent of the study participants (12/17) completed at least 75% Selleck CHIR98014 of the study sessions and therefore adhered to the study protocol. Among the adherers, 7 out of 12 (58%) had adherence rates of 100%. Five participants withdrew from the exercise group due to lack of time and lack of interest.\n\nConclusion: Exercise adherence rates among African-American men in this study were favorable cluing this supervised exercise intervention and were comparable to adherence rates observed in other supervised exercise. interventions. Recommendations based on this pilot study are provided to reduce Dibutyryl-cAMP cost participant withdrawal and to inform future large-scale studies.”
“Introduction

Comprehensive epidemiological data regarding factors associated with traumatic dental injuries are scarce. Objective The aim of the present study was to assess the frequency and analyze the factors associated with traumatic dental injuries in Serbian children. Methods Research included children and adolescents with traumatic dental injury aged 0-19 year during the period from 2003 to 2010, in four University Dental Centres in Serbia: Belgrade, Nis, Novi Sad and Kragujevac. Patient history, demographic, clinical and radiographic data were obtained from dental trauma forms. Results Total of 2,194 patients (748 girls, 1,446 boys) (chi(2)=222.1; p smaller than 0.01) with 3,077 injured teeth in permanent and 953 in primary dentition were observed. Most of patients were aged 7 to 12 years (n=1,191).

The correctness of deterministic linkages depends on the complete

The correctness of deterministic linkages depends on the completeness of the data and may vary according to age, with lower rates of linkage for children 1 to 9 years of age.(2) Consequently, it is possible that records were missed or misclassified, leading to an underreporting of the accuracy of …”
“Intrinsic resistance to cytotoxic drugs has been a main issue in cancer therapy for decades. Microenvironmental acidity is a simple while highly efficient mechanism of chemoresistance,

exploited through impairment of drug delivery. The latter is find more achieved by extracellular protonation and/or sequestration into acidic vesicles. This study investigates the importance of extracellular acidosis and nanovesicle (exosome) release in the resistance of human tumour cell to cisplatin (CisPt); in parallel to proton pump inhibitors (PPI) ability of interfering

with these tumour cell features. The results showed that CisPt uptake by human tumour cells was markedly impaired by low pH conditions. Moreover, exosomes purified from supernatants of these cell cultures contained various amounts of CisPt, which correlated to the pH conditions of the culture medium. HPLC-Q-ICP-MS analysis revealed that exosome purified from tumour cell culture supernatants contained CisPt in its native form. PPI pre-treatment increased cellular uptake of CisPt, as compared to untreated cells, in an acidic-depend manner. Furthermore, it induced a clear inhibition of exosome release by tumour cells. Human tumours obtained from xenografts pretreated with PPI contained Duvelisib cost more CisPt as compared to tumours from xenografts treated with CisPt alone. Further analysis showed that in vivo PPI treatment induced a clear reduction in the plasmatic levels of tumour-derived exosomes which also contained lower level of CisPt. Altogether, these findings point to the identification of a double mechanism that human malignant melanoma use in resisting to a dreadful cellular poison such as cisplatin.

This framework of resistance includes both low pH-dependent extracellular sequestration and an exosome-mediated elimination. Both mechanisms are markedly impaired by proton pump inhibition, leading to an increased CisPt-dependent cytotoxicity.”
“Background: MK-2206 cost Pyrrole adducts might be used as a biomarker for monitoring occupational exposure to n-hexane, but the Biological Exposure Indices of pyrrole adducts in serum and urine are still unknown. The current study was designed to investigate the biological exposure limit of pyrrole adducts for hazard assessment of n-hexane.\n\nMethods: Male Wistar rats were given daily dose of 500, 1000, 1500, 2000, 4000 mg/kg bw n-hexane by gavage for 24 weeks. The levels of pyrrole adducts in serum and urine were determined at 8, 24 hours postdose once a week.