These solid-state materials showed activated electronic transport

These solid-state materials showed activated electronic transport with activation energies of 100 to 150 millielectron volts. The more reducing cluster Ni9Te6(PEt3)(8) transferred more charge to the fullerene and formed a rock-salt-related structure. In this material, the constituent clusters are able to interact electronically to produce a magnetically ordered phase at low

temperature, akin to atoms in a solid-state compound.”
“The transition from jawless to Volasertib jawed vertebrates (gnathostomes) resulted in the reconfiguration of the muscles and skeleton of the head, including the creation of a separate shoulder girdle with distinct neck muscles. We describe here the only known examples of preserved musculature from placoderms (extinct armored fishes), the phylogenetically most basal jawed vertebrates. Placoderms possess a regionalized muscular anatomy that differs radically from the musculature of extant sharks, which is often viewed as primitive for gnathostomes. The placoderm data suggest that neck musculature evolved together with a dermal joint between skull and shoulder girdle, not as part of a broadly flexible

neck as in sharks, and that transverse abdominal muscles are an innovation of gnathostomes rather than of tetrapods.”
“A recent dramatic increase in seismicity in the midwestern United States may be related to increases in PF477736 supplier deep wastewater injection. Here, we demonstrate that areas with suspected anthropogenic earthquakes are also more susceptible to earthquake-triggering from natural transient stresses generated by the seismic waves of large remote earthquakes. Enhanced triggering

susceptibility suggests the presence of critically loaded faults and potentially high fluid pressures. Sensitivity to remote triggering is most clearly seen in sites with a long Trichostatin A price delay between the start of injection and the onset of seismicity and in regions that went on to host moderate magnitude earthquakes within 6 to 20 months. Triggering in induced seismic zones could therefore be an indicator that fluid injection has brought the fault system to a critical state.”
“Ca2+/cation antiporters catalyze the exchange of Ca2+ with various cations across biological membranes to regulate cytosolic calcium levels. The recently reported structure of a prokaryotic Na+/Ca2+ exchanger (NCX_Mj) revealed its overall architecture in an outward-facing state. Here, we report the crystal structure of a H+/Ca2+ exchanger from Archaeoglobus fulgidus (CAX_Af) in the two representatives of the inward-facing conformation at 2.3 angstrom resolution. The structures suggested Ca2+ or H+ binds to the cation-binding site mutually exclusively. Structural comparison of CAX_Af with NCX_Mj revealed that the first and sixth transmembrane helices alternately create hydrophilic cavities on the intra-and extracellular sides.

08; 95% confidence interval, 0 82-1 40; P = 57)

Conc

08; 95% confidence interval, 0.82-1.40; P = .57).

Conclusions: Incomplete revascularization of patients with 3-vessel disease is an independent risk factor for increased ARS-1620 long-term mortality after coronary artery bypass grafting. In contrast, the use of on-or off-pump techniques had no significant effect on survival after adjusting for incomplete revascularization.”
“Background: Whether bivalirudin is superior to unfractionated heparin in patients with

stable or unstable angina who undergo percutaneous coronary intervention (PCI) after pretreatment with clopidogrel is unknown.

Methods: We enrolled 4570 patients with stable or unstable angina (with normal levels of troponin T and creatine kinase MB) who were undergoing PCI after pretreatment with a 600-mg dose of clopidogrel at least 2 hours before the procedure; 2289 patients were randomly assigned in a double-blind manner to receive bivalirudin, and 2281 to receive unfractionated heparin. The primary

end point was the composite of death, myocardial infarction, urgent target-vessel revascularization due to myocardial ischemia within 30 days Selleck Quisinostat after randomization, or major bleeding during the index hospitalization (with a net clinical benefit defined as a reduction in the incidence of the end point). The secondary end point was the composite of death, myocardial infarction, or urgent target-vessel revascularization.

Results: The incidence of the primary

end point was 8.3% (190 patients) in the bivalirudin group as compared with 8.7% (199 patients) in the unfractionated-heparin group (relative risk, 0.94; 95% confidence interval [CI], 0.77 to 1.15; P=0.57). The secondary end point occurred in 134 patients (5.9%) in the bivalirudin group and 115 patients (5.0%) in the unfractionated-heparin group (relative risk, 1.16; 95% CI, 0.91 to 1.49; P=0.23). The incidence of major bleeding was 3.1% (70 patients) in the bivalirudin group and 4.6% (104 patients) in the unfractionated-heparin group (relative risk, 0.66; 95% CI, 0.49 to 0.90; P=0.008).

Conclusions: In patients with stable and unstable angina DNA ligase who underwent PCI after pretreatment with clopidogrel, bivalirudin did not provide a net clinical benefit (i.e., it did not reduce the incidence of the composite end point of death, myocardial infarction, urgent target-vessel revascularization, or major bleeding) as compared with unfractionated heparin, but it did significantly reduce the incidence of major bleeding. (ClinicalTrials.gov number, NCT00262054.).”
“Objective: Various tissue-engineered vascular grafts have been studied to overcome the clinical disadvantages of conventional prostheses. Previous tissue-engineered vascular grafts have generally required preoperative cellular manipulation or use of bioreactors to improve performance, and their mechanical properties have been insufficient.


“The infected cell polypeptide 4 (ICP4) of herpes simplex


“The infected cell polypeptide 4 (ICP4) of herpes simplex virus 1 (HSV-1) is a regulator of viral transcription that is required for productive infection. Since viral genes are transcribed by cellular RNA polymerase II (RNA pol II), ICP4 must interact with components of the pol II machinery to regulate viral gene expression. It has been shown previously that ICP4 interacts with TATA box-binding protein (TBP), TFIIB, and the TBP-associated factor 1 (TAF1) in vitro. In this study, ICP4-containing

complexes were isolated from infected cells by tandem affinity purification (TAP). Forty-six proteins that copurified with ICP4 were identified by mass spectrometry. Additional copurifying proteins were identified by Western blot analysis. These included 11 components of TFIID and 4 components of the Mediator complex. OSI-744 datasheet The significance of the ICP4-Mediator interaction was further investigated using immunofluorescence and chromatin immunoprecipitation. Mediator was found to colocalize with ICP4 starting at early and continuing into late times of infection. In addition, Mediator was recruited to viral promoters in an ICP4-dependent manner. Taken together, the data suggest

that ICP4 interacts with components of TFIID and Mediator in the context of viral infection, and this may explain the broad transactivation properties of ICP4.”
“A continuously increasing

body of knowledge shows that the brain is an extremely complex neural network Luminespib order and single neurons possess their own complicated interactive signaling pathways. Such complexity of the nervous system makes it increasingly difficult to investigate the functions of specific neural components such as genes, proteins, transcription factors, neurons and Selleckchem PR 171 nuclei in the brain. Technically, it has been even more of a significant challenge to identify the molecular and cellular adaptations that are both sufficient and necessary to underlie behavioral functions in health and disease states. Defining such neural adaptations is a critical step to identify the potential therapeutic targets within the complex neural network that are beneficial to treat psychiatric disorders. Recently, the new development and extensive application of in vivo viral-mediated gene transfer (virogenetics) and optical manipulation of specific neurons or selective neural circuits in freely-moving animals (optogenetics) make it feasible, through loss-and gain-of-function approaches, to reliably define sufficient and necessary neuroadaptations in the behavioral models of psychiatric disorders, including drug addiction, depression, anxiety and bipolar disorders.

These results suggest that functional connectivity and grey matte

These results suggest that functional connectivity and grey matter volume are not equally distributed between hemispheres BI-D1870 datasheet within the DMN, and that functional asymmetries are not always reflected or determined by structural asymmetries. (C) 2012 Elsevier Ltd. All rights reserved.”
“The

cell cycle inhibitors p21(Waf1/Cip1) and p27(Kip1) are frequently downregulated in many human cancers, and correlate with a worse prognosis. We show here that combined deficiency in p21 and p27 proteins in mice is linked to more aggressive spontaneous tumorigenesis, resulting in a decreased lifespan. The most common tumors developed in p21p27 double-null mice were endocrine, with selleck products a higher incidence of pituitary adenomas, pheochromocytomas and thyroid adenomas. The combined absence of p21 and p27 proteins delays the incidence of radiation-induced thymic lymphomas with a higher apoptotic rate, measured by active caspase-3 and cleaved PARP-1 immunoexpresion. These results provide experimental evidence for a cooperation of both cyclin-dependent kinase inhibitors in tumorigenesis in mice. Laboratory Investigation (2011) 91, 1634-1642; doi:10.1038/labinvest.2011.133; published online 29 August 2011″
“Ethanol and caffeine are two of the most widely consumed drugs in the

world, often used in the same setting. Animal models may help to understand the conditions under which incidental memories formed just before ethanol intoxication might be lost or become difficult to retrieve.

Ethanol-induced retrograde amnesia was investigated

using a new odor-recognition test.

Rats thoroughly explored JNJ-64619178 manufacturer a wood bead taken from the cage of another rat, and habituated to this novel odor (N1) over three trials. Immediately following habituation, rats received saline, 25 mg/kg pentylenetetrazol (a seizure-producing agent known to cause retrograde amnesia) to validate the test, 1.0 g/kg ethanol, or 3.0 g/kg ethanol. The next day, they were presented again with N1 and also a bead from a new rat’s cage (N2).

Rats receiving saline or the lower dose of ethanol showed overnight memory for N1, indicated by preferential exploration of N2 over N1. Rats receiving pentylenetetrazol or the higher dose of ethanol appeared not to remember N1, in that they showed equal exploration of N1 and N2. Caffeine (5 mg/kg), delivered either 1 h after the higher dose of ethanol or 20 min prior to habituation to N1, negated ethanol-induced impairment of memory for N1. A combination of a phosphodiesterase-5 inhibitor and an adenosine A(2A) antagonist, mimicking two major mechanisms of action of caffeine, likewise prevented the memory impairment, though either drug alone had no such effect. Binge alcohol can induce retrograde, caffeine-reversible disruption of social odor memory storage or recall.

In addition, the serum level of the pro-inflammatory cytokine tum

In addition, the serum level of the pro-inflammatory cytokine tumor necrosis factor-alpha was increased in MIA rats. This study advances our understanding of how MIA affects adolescent behavior and brain function. Copyright

(C) 2011 S. Karger AG, Basel”
“Human cytomegalovirus (HCMV) is a human pathogen that causes severe disease primarily in the immunocompromised AZD9291 or immunologically immature individual. To date, no vaccine is available. We describe use of a spread-deficient murine CMV (MCMV) as a novel approach for betaherpesvirus vaccination. To generate a spread-deficient MCMV, the conserved, essential gene M94 was deleted. Immunization with MCMV-Delta M94 is apathogenic and protective against wild-type challenge even in highly susceptible IFN alpha beta R(-/-) Paclitaxel cell line mice. MCMV-Delta M94 was able to induce a robust CD4(+) and CD8(+) T-cell response as well as a neutralizing antibody response comparable to that induced by wild-type infection. Endothelial cells were identified as activators of CD8(+) T cells in vivo. Thus, the vaccination with a spread-deficient betaherpesvirus is a safe and protective strategy and allows the linkage

between cell tropism and immunogenicity. Furthermore, genomes of MCMV-Delta M94 were present in lungs 12 months after infection, revealing first-target cells as sites of genome maintenance.”
“Background/Aim: Infantile colic (IC) is considered to represent the upper end of the spectrum of early developmental crying behavior. Little is ARN-509 known about hypothalamic-pituitary-adrenocortical axis activity and sleep in relation to infants’ crying. The aim of the present study was to assess cortisol secretion in infants in relation to their sleep and crying patterns. Method: Sixteen infants (mean age: 8 weeks; SD = 1.5 weeks) were enrolled. Their mothers completed a series of questionnaires regarding the infants’ crying and sleeping patterns. The infants’ sleep was objectively assessed with actigraphs. After 4 weeks, the infants were assessed once again. Cortisol secretion was measured by means of

saliva samples in the mornings after awakening. Results: Morning saliva cortisol levels were related to more frequent awakening and to increased crying intensity, but not to sleep or crying duration. Over 4 weeks, both crying behavior and sleep duration decreased, but there was no association between them. Cortisol secretion did not significantly change. Conclusions: In infants suffering from IC, fragmented sleep patterns and increased saliva cortisol levels were related. Cortisol secretion seems to be related to crying intensity, but not to crying duration. Crying intensity may reflect greater physiological or psychological stress rather than mere duration of crying. Copyright (C) 2011 S. Karger AG, Basel”
“HIV protease (PR) mediates the processing of human immunodeficiency virus (HIV) polyproteins and is necessary for the viral production.

we investigated the effects of acute and chronic treatment with a

we investigated the effects of acute and chronic treatment with a selective serotonin reuptake inhibitor (SSRI) and with a serotonin noradrenalin reuptake inhibitor (SNRI) on V1bR knockout (KO) mice and on V1bR antagonist (SSR149415)-treated mice The effects were evaluated ill experiments using ail elevated plus-maze (EPM) test and a hole-board (HB) test, well established tests for evaluating anxiety-like behavior. For both the V1bR KO slice and V1bR antagonist-treated mice, acute treatment with either SSRI or SNRI did not change

the time spent on the EPM open arms or the number of head clips in the HB Chronic treatment of V1bR KO mice with SSRI did not change the amount of tinge spent oil the open arms, the number of head dips. or the number of rearings, while chronic treatment with SNRI significantly

AZD4547 increased the time spent oil the open arms and the number of head dips These results suggest that the anti-anxiety action of 5-HT reuptake inhibitors plight partly involve V1bR regulating the anxiety behaviors (C) 2009 Elsevier Ireland Ltd and the Japan Neuroscience Society. All rights reserved”
“Purpose: Pelvic lymphadenectomy is frequently performed simultaneously with radical prostatectomy Dinaciclib chemical structure to determine lymph node status and the most frequently recorded postoperative complication is the development AZD2014 cost of a symptomatic lymphocele. This study evaluated TachoSil (R) as an adjunct treatment in preventing lymphoceles after extraperitoneal pelvic lymphadenectomy for prostate cancer.

Materials and Methods: A total of 60 consecutive patients who had undergone

radical prostatectomy and pelvic lymphadenectomy were prospectively enrolled in this study. The patients were randomly assigned to a standard technique with the use of clips and electrocoagulation plus TachoSil, or to standard technique only. All patients underwent ultrasound examination on postoperative days 7, 14 and 28 to test for the development of symptomatic or asymptomatic lymphoceles. Drainage volume and duration were also recorded.

Results: The baseline characteristics of the 2 randomized groups were well matched. Those patients in whom we used TachoSil showed a lower drainage volume with a mean total volume of 64 +/- 45 ml (range 0 to 110) vs 190 +/- 62.72 ml (range 70 to 270, p = 0.009), and had significantly fewer symptomatic and asymptomatic lymphoceles (5 vs 19, p = 0.001). Only 5 percutaneous surgical procedures to drain the lymphoceles proved necessary, 1 of which occurred in the group with TachoSil.

Conclusions: TachoSil seems to provide a useful additional treatment option for reducing drainage volume and preventing lymphocele development after extraperitoneal radical retropubic prostatectomy with pelvic lymphadenectomy.

Since IE62 colocalized with CDK1/cyclin B1 by confocal microscopy

Since IE62 colocalized with CDK1/cyclin B1 by confocal microscopy, we investigated whether this cellular kinase complex interacts with IE62. Using recombinant fragments of IE62 spanning the entire amino acid sequence, we found that purified CDK1/cyclin B1 phosphorylated IE62 at residues T10, S245, and T680 in vitro. Immunoprecipitation of cyclin B1 from VZV-infected HFFs indicated that IE62 was included in the complex within infected cells. The full-length IE62 protein, obtained by immunoprecipitation from infected cells, was also phosphorylated Nec-1s by purified CDK1/cyclin B1. Based on IE62/CDK1/cyclin B1 colocalization near viral assembly regions, we hypothesized

check details that these cellular proteins could be incorporated into VZV virions with IE62. Purified virions were analyzed by immunoblotting for the presence of CDK1 and cyclin B1, and active CDK1 and cyclin B1 were present in the VZV tegument with IE62 and were sensitive to detergent treatment. Thus, IE62 is a substrate for CDK1/cyclin B1, and virions could deliver the active cellular kinase to nondividing cells that normally do not express it.”
“We studied Alzheimer’s disease (AD) pathology in the precuneus and surrounding brain areas. Anatomically,

the precuneus corresponds to the medial portion of human cerebral cortical Brodmann Area 7. This study utilized patients from the University of Kentucky Alzheimer’s

Disease Center autopsy cohort. Data from 47 brains were used comprising patients of BV-6 differing antemortem cognitive impairment severities. each with longitudinal clinical data and extensive neuropathological data. We assessed whether the precuneus and surrounding areas are differentially vulnerable to AD-type pathological lesions (diffuse amyloid plaques, neuritic amyloid plaques, and neurofibrillary tangles). Eleven areas of brain were evaluated for each case: amygdala, hippocampal CA1. subiculum. entorhinal cortex, frontal cortex, superior and middle temporal gyri, inferior parietal lobule, occipital cortex, posterior cingulate gyrus, Brodmann Area 31, and the precuneus proper. Like other areas of neocortex, the precuneus demonstrated increased diffuse and neuritic amyloid plaques early in the evolution in AD, and increased neurofibrillary tangles late in AD. Correcting for the antemortem cognitive status of the patients, there was no evidence of an increase in the density of AD-type pathology in the precuneus or neighboring areas relative to other areas of cerebral neocortex. Our results are not consistent with the idea that the precuneus is involved in a special way with plaques or tangles relative to other areas of neocortex. (C) 2008 Elsevier Ireland Ltd. All rights reserved.

CICs were no longer detected in serum once free anti-WHs became d

CICs were no longer detected in serum once free anti-WHs became detectable. The detection of CICs around the peak in serum viremia and WHs antigenemia in resolving woodchucks suggests a critical role for the humoral immune response against WHsAg in the early elimination of viral and subviral OSI-744 research buy particles from the peripheral blood. Individual kinetic variation during WHV infections in resolving woodchucks infected with the same WHV inoculum and dose is likely due to

the outbred nature of the animals, indicating that the onset and magnitude of the individual immune response determine the intensity of virus inhibition and the timing of virus elimination from serum.”
“A vaccine for human immunodeficiency virus (HIV) infection is desperately needed to control the AIDS pandemic. To address this problem, we constructed single-cycle simian immunodeficiency viruses (SIVs) pseudotyped with the glycoprotein of vesicular stomatitis virus and expressing different levels of gamma interferon (IFN-gamma) as a potential vaccine strategy. We previously showed that IFN-gamma expression by pseudotyped SIVs does not alter viral single-cycle infectivity. T cells primed with dendritic cells transduced by pseudotyped SIVs expressing high levels of IFN-gamma had stronger T-cell responses than those primed with dendritic cells transduced by constructs lacking IFN-gamma. In

the present study, we tested the immunogenicities of these pseudotyped SIVs in a rat model. The construct expressing low levels of rat IFN-gamma (dSIV(LR gamma)) induced higher levels of cell-mediated and humoral immune responses than click here the construct lacking IFN-gamma (dSIV(R)). Rats vaccinated with dSIV(LR gamma) also had lower viral loads than those vaccinated with dSIVR when inoculated with a recombinant vaccinia virus expressing

SIV Gag-Pol as a surrogate challenge. The construct expressing high levels of IFN-gamma (dSIV(HR gamma)) did not further enhance 4-Hydroxytamoxifen manufacturer immunity and was less protective than dSIV(LR gamma). In conclusion, the data indicated that IFN-gamma functioned as an adjuvant to augment antigen-specific immune responses in a dose-and cell type-related manner in vivo. Thus, fine-tuning of the cytokine expression appears to be essential in designing vaccine vectors expressing adjuvant genes such as the gene for IFN-gamma. Furthermore, we provide evidence of the utility of the rat model to evaluate the immunogenicities of single-cycle HIV/SIV recombinant vaccines before initiating studies with nonhuman primate models.”
“Interferon (IFN)-stimulated gene 15 (ISG15) is a ubiquitin-like molecule that conjugates to target proteins via a C-terminal LRLRGG motif and has antiviral function in vivo. We used structural modeling to predict human ISG15 (hISG15) residues important for interacting with its E1 enzyme, UbE1L.

The 25(OH)D ORs differed between men and women (p = 041) ORs ch

The 25(OH)D ORs differed between men and women (p = .041). ORs changed little after controlling for PTH. However, when low energy expenditure was excluded from the frailty

definition, adjusted OR for frailty in men (95% CI) was 2.18 (0.59-8.04); controlling for PTH attenuated this OR by 32%. In women, the OR (95% CI) for frailty (low energy expenditure excluded) was 1.54 (0.31-7.58) and was attenuated by 6% after controlling for PTH.

Conclusions. Vitamin D insufficiency was associated with frailty in men, but not in women. Results suggest that PTH mediates the relationship between 25(OH)D and nonenergy expenditure aspects of frailty.”
“Our objective is to verify the modulatory effects of bromazepam on EEG theta absolute power when subjects were submitted to a visuomotor task (i.e., car driver task). Sample was composed of 14 students (9 males and 5 females), right handed, with ages varying

between 23 and 42 years (mean = 32.5 +/- 9.5), absence of mental check details or physical impairments, no psychoactive or psychotropic substance use and no neuromuscular disorders (screened by a clinical examination). The results showed an interaction between condition and electrodes (p=0.034) in favor of F8 electrode compared with F7 in both experimental conditions (t-test; p=0.001). Additionally, main effects were observed for condition (p=0.001), period (p=0.001) and electrodes (p=0.031) in favor of F4 electrode compared with F3. In conclusion, Br 6 mg of bromazepam may interfere in sensorimotor processes in the task performance in an unpredictable scenario allowing that certain visuospatial factors were Talazoparib cell line predominant. Therefore, the results may reflect that bromazepam effects influence the performance Evofosfamide concentration of the involved areas because of the acquisition and integration of sensory stimuli processes until the development of a motor behavior based on the same stimuli. (C) 2009 Elsevier Ireland Ltd. All rights reserved.”
“Background. Older persons often complain of fatigue, but the functional consequences of this symptom are unclear. The aim of the present study was to evaluate fatigue and its association

with measures of physical function and disability in a representative sample of the older population.

Methods. Cross-sectional data from a population-based sample of 1,055 Italian men and women aged 65 and older were analyzed. Fatigue was defined according to two questions evaluating whether participants felt that “”everything was an effort”" and/or they “”could not get going”" on three or more days in the past week. Objective measures of physical function were handgrip strength, the Short Physical Performance Battery (SPPB), and 400-m walking speed. Disability was defined as the inability to complete the 400-m walk test and self-reported difficulty in activities of daily living (ADL) and instrumental activities of daily living (IADL).

Results. The prevalence of fatigue was higher in women (29%) than in men (15%).

bungeana “
“The peptidoglycan cell wall maintains turgor pre

bungeana.”
“The peptidoglycan cell wall maintains turgor pressure and cell shape of most bacteria. Cell wall hydrolases are essential, together with synthases, for growth and daughter cell separation. Recent work in diverse organisms has uncovered new cell wall hydrolases that act autonomously or on neighboring cells to modulate

invasion of prey cells, cell shape, innate immune detection, intercellular communication, and competitor lysis. The hydrolases PD0332991 involved in these processes catalyze the cleavage of bonds throughout the sugar and peptide moities of peptidoglycan. Phenotypes associated with these diverse hydrolases reveal new functions of the bacterial cell wall beyond growth and division.”
“Efficient and inefficient visual search are characterized by the difference in the time required to find the target. Efficient “”popout”" search time is relatively unaffected by increases in the number of search items, whereas inefficient “”non-popout”" search time requires more time increases

in duration. Electrophysiological investigations of the neural correlates of visual search have revealed a component of the event-related potential (ERP) known as the N2pc. The N2pc is thought to reflect the orienting of attention to the target during visual search. If the N2pc is more closely associated in time with the moment of target selection 4SC-202 than the onset of the search display, it may be predicted that the N2pc would be delayed or more temporally variable during inefficient compared to efficient visual search. In the present study, we contrasted efficient “”popout”" search with inefficient “”non-popout”" search to investigate the hypothesis that the N2pc is temporally

associated with the moment of search completion, and this would be reflected as a delayed or attenuated N2pc during non-popout search compared to popout In Experiment 1, we observed a robust N2pc during popout search, but not during non-popout search. However, sorting trials by the N2pc latency recovered the N2pc during non-popout search. In Experiment 2 we replicated this Pritelivir cost observation and demonstrated that popout and non-popout search reflected differences in the temporal variability of the N2pc latency. Further investigation using time-spectral analysis suggests that evoked posterior-contralateral theta (4-6 Hz) underlies the N2pc during both popout and non-popout search. (C) 2012 Elsevier Ltd. All rights reserved.”
“The adverse effects of either NaCl or mannitol on amino acids, protein patterns and nucleic acids in Vicia faba seeds were investigated.