Testosterone and DHT robustly inhibited post-ischemic neurogenesi

Testosterone and DHT robustly inhibited post-ischemic neurogenesis in the dentate gyrus, and the more potent androgen DHT virtually abolished the presence of immature newborn neurons (BrdU/doublecortin-positive cells) in the injured striatum. Our data suggest that endogenous androgens do not alter post-stroke neurogenesis quantitatively, but the presence of supra-physiological androgen stimulation profoundly suppresses early neurogenesis in germinal brain areas and reduces cellular repair in injured tissue Anlotinib after cerebral ischemia. These results advance the understanding of the role that androgens play in stroke

outcomes.”
“Objectives.

To collect information on the role of acupuncture in pain management from pain physicians and referral physicians who manage clinical pain conditions.

Methods.

The survey was conducted between 2007 and 2008 through nationwide direct mail or e-mail to 1083 physicians who are currently practicing in the United States. We divided our 16 survey questions into five categories: 1) physician’s attitude toward acupuncture as a modality of pain management; 2) physician’s preference or belief with regard to the type of pain condition suitable for acupuncture referrals; 3) timing for making acupuncture referrals (e.g., acupuncture

as a first line pain treatment option or a last approach after failed conventional pain management); 4) clinical assessment criteria for the effectiveness of acupuncture therapy; and 5) barriers to making acupuncture referrals (e.g., physician’s personal selleck products view, insurance issues, patient refusal, etc.). The survey results were calculated and interpreted

as the percentage rate of response.

Result.

The results indicate that an overwhelming majority of survey responders have a positive attitude and favorable experience with using acupuncture as an alternative modality for chronic pain management. However, our survey responders are mostly from teaching hospitals, suggesting a possible gap between teaching hospitals and other medical facilities (private practice and community hospitals) in utilizing acupuncture for pain management. The lack of insurance ALK inhibitor coverage and facility for acupuncture treatment are two primary barriers to making acupuncture referrals.

Conclusions.

The survey results indicate that acupuncture is considered by many physicians to be a useful alternative modality for chronic pain management.”
“Comparative effectiveness research in spine surgery is still a rarity. In this study, pain alleviation and quality of life (QoL) improvement after lumbar total disc arthroplasty (TDA) and anterior lumbar interbody fusion (ALIF) were anonymously compared by surgeon and implant.

A total of 534 monosegmental TDAs from the SWISSspine registry were analyzed. Mean age was 42 years (19-65 years), 59 % were females. Fifty cases with ALIF were documented in the international Spine Tango registry and used as concurrent comparator group for the pain analysis.

A considerable

damping of the fluctuation amplitude by en

A considerable

damping of the fluctuation amplitude by ensemble averaging is achieved by connecting nanowires in parallel. The suppression of the fluctuation amplitude is studied systematically by measuring samples with different numbers of nanowires. By utilizing the damping of the conductance fluctuations by connecting nanowires in parallel in combination with an averaging over the gate voltage, weak localization effects are resolved. For both sets of nanowires a clear evidence of the weak Semaxanib research buy antilocalization is found, which indicates the presence of spin-orbit coupling. For the spin-orbit scattering length l(so) values in the order of 100 nm are extracted. (c) 2010 American Institute of Physics. [doi: 10.1063/1.3516216]“
“Purpose: To evaluate the cost- effectiveness of diagnostic strategies for individuals with chest pain without known coronary artery disease (CAD) in the Assessment by Coronary Computed Tomographic 5-Fluoracil DNA Damage inhibitor Angiography of Individuals Undergoing Invasive Coronary Angiography-eligible population.

Materials and Methods: A decision analysis was performed in which the following were compared: coronary computed tomographic (CT) angiography followed by invasive coronary angiography for positive or equivocal findings (coronary CT angiography only),

coronary CT angiography followed by invasive coronary angiography for positive findings and myocardial perfusion single photon emission computed tomography (SPECT) for equivocal findings (coronary CT angiography first), myocardial perfusion SPECT followed by invasive coronary angiography for positive/equivocal findings (myocardial perfusion SPECT only), myocardial perfusion SPECT followed by invasive coronary angiography for positive findings and coronary CT angiography for equivocal findings (myocardial perfusion SPECT first),

and invasive coronary angiography. Analyses were conducted from the payer perspective for a near-term diagnostic period and a long-term lifetime period. The base case was a 55-year-old man with 30% risk of obstructive CAD.

Results: click here By using the base case for near-term cost per correct diagnosis, a coronary CT angiography-first strategy was the least expensive, followed by coronary CT angiography only (incremental cost-effectiveness ratio [ICER] = $17516). For long-term cost-effectiveness, a coronary CT angiography-only strategy demonstrated a favorable ICER of $20429 per quality-adjusted life-year (QALY) relative to the least expensive coronary CT angiography-first strategy. Both myocardial perfusion SPECT-only and myocardial perfusion SPECT-first strategies were more costly and less effective than either coronary CT angiographic strategy. Long-term results were sensitive to coronary CT angiographic sensitivity, myocardial perfusion SPECT sensitivity, and CAD prevalence.

CeRAMs contrary to just standard NiO based resistive memories use

CeRAMs contrary to just standard NiO based resistive memories use the pure Mott-like charge transfer insulator in which an abrupt metal BEZ235 nmr to insulator transition is the dominant mechanism without the aid of charge trapping vacancies. In our films the effect of the oxygen vacancies are canceled due to the stabilizing effect of the carbonyl based extrinsic

ligand. In this paper, detailed process sequence and the extrinsic ligand doping scheme is described in some length. It is shown that complexes formed by the introduction of the extrinsic ligand promote Ni(2+) ions to enter the disproportionation reaction Ni(2+) + Ni(2+) -> Ni(1+) + Ni(3+) which is considered to be responsible for the memory mechanism. (C) 2011 American Institute of Physics. [doi:10.1063/1.3581197]“
“Salivary gland tumors account for a significant group of head and neck neoplasms. Signet-ring cell (mucin-producing) adenocarcinoma of minor salivary glands was described by Ghannoum and Freedman in 2004. ATM/ATR inhibitor drugs We report a case of this extremely rare minor salivary gland neoplasm in an 18-year-old male. To our

knowledge, this patient is the youngest to ever be reported having this tumor. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2010;110:e33-e36)”
“Multilayered films of Au/ZnO were prepared by physical vapor deposition. Varying the Au thickness, t(Au), and the number of bilayers, n, allowed us to investigate the role of these parameters on the sample structural and electronic properties. X-ray diffraction, X-ray absorption spectroscopy, grazing incidence small angle X-ray scattering and transmission electron microscopy experiments, have been combined to UV-visible and infrared spectroscopy to characterize the multilayers in the as-prepared state

and after annealing. In the as-prepared state, the strong Au and ZnO lattice interaction leads to ZnO epitaxy on Au. Gold appears either as continuous layers or in form of nanoparticles. ZnO experiences a structural transformation from wurztite to rock salt monitored by the Au morphology. Annealing at 500 degrees C destroys the lattice matching. The electronic and optical properties of the systems are understood SNS-032 price in line with the Au morphology and ZnO structural state. (C) 2011 American Institute of Physics. [doi:10.1063/1.3580333]“
“Squamous cell carcinomas (SCC) of minor salivary gland origin are extremely rare. We present an unusual case of a 29-year-old female patient who presented with a well-differentiated SCC of minor salivary gland origin arising in the lower lip. Wedge resections of the lip, including bilateral mental nerve excision, were required to clear the tumor because of striking pathological evidence of perineural invasion distant from the primary tumor site.

This study demonstrates the potential usefulness of natural antio

This study demonstrates the potential usefulness of natural antioxidants extracted from barley husks in the development of active packaging films for food preservation. (C) 2010 Elsevier Ltd. All rights reserved.”
“Urinary incontinence is common among women, and these individuals may have different perceptions about sensitive skin than the general population.

We used an epidemiological approach to determine patterns of perceived sensitive skin among incontinent women. In addition, perceptions Selleckchem VE821 about sensitivity to certain products and environmental factors were evaluated.

A total of 29 women over the

age of 50 suffering from light urinary incontinence filled out questionnaires designed to evaluate perceptions of sensitive skin in general, and at specific body sites (face, body and genital area). Results were compared to age- and gender-matched

control subjects.

A significant difference was found between incontinence and controls for perceived sensitivity in general, however, no significant differences were found for perceived sensitivity at the three specific body sites, i.e., face, body and genital area. The PD173074 in vivo majority of participants in both the control and incontinent groups were fairly consistent with the perception of sensitive skin in general and sensitive skin of the face and body. Both groups were less consistent in describing the skin of the genital area. Responses of the two groups were similar regarding the perception of the certain environmental factors and products cause irritation.

A significantly higher percentage of

subjects with urinary incontinence describe their skin overall as “”sensitive”". Incontinents tended to describe the skin of the genital area as less sensitive than skin overall, whereas the controls tended to the genital area as more sensitive.”
“To check details treat hypertension around 75% of patients will require combination therapy for which administration of lisinopril and indapamide could be of practical use. Lisinopril has a low oral bioavailability (around 25%) with large intersubject variability (6-60%), due to slow absorption. In order to improve drug permeability, encapsulation of the drugs within nanoparticles (NPs) has demonstrated great potential. For this reason we have prepared hard capsules containing both drugs: indapamide and lisinopril-loaded chitosan (CS) nanoparticles. The mucoadhesive characteristics of CS-NPs will prolong the residence time of lisinopril in contact with the intestinal membrane thereby increasing its oral bioavailability. Moreover, for their quantification a reversed-phase HPLC method is developed and validated using a C18 column. The mobile phase is prepared with methanol: water (50: 50, v/v) including triethylamine (0.1% of total volume) and adjusted at pH 3.1. The calibration curves are linear over the ranges 16-24 mu g.mL(-1) for lisinopril and 8-12 mu g.mL(-1) for indapamide. Intra-day precision results in % RSD ranging 0.74-1.

Despite the important physiological activities of IL-6, dysregula

Despite the important physiological activities of IL-6, dysregulated overproduction of IL-6 is pathologically involved in TGF-beta inhibitor various immune-mediated inflammatory diseases (IMIDs) including rheumatoid arthritis (RA). A series of clinical studies of tocilizumab, a humanized anti-IL-6 receptor (IL-6R) antibody,

for patients with RA refractory to conventional therapy or anti-tumor necrosis factor therapy have demonstrated the clinical benefit of IL-6 blockade in RA. On the other hand, there is now accumulating evidence that tocilizumab is therapeutically effective for patients with a number of IMIDs other than RA. This review focuses on the perspective of IL-6 blockade therapy for such IL-6-related IMIDs outside of RA.

Recent findings

A considerable number of case reports and preclinical studies have shown the benefit of IL-6

blockade therapy in various IMIDs such as systemic lupus erythematosus, adult-onset Still disease, Takayasu arthritis, polyarteritis nodosa, systemic sclerosis, reactive arthritis, dermatomyositis, and polymyositis.

Summary

Blocking IL-6 with tocilizumab can be a therapeutic option for patients with various IMIDs in which overproduction of IL-6 plays a pathological role. Future clinical studies investigating the safety and efficacy will elucidate the Citarinostat clinical benefits of IL-6 blockade therapy for such diseases.”
“To present psychometric information and studies dealing with questionnaires for age-related macular degeneration (AMD) and visually impaired patients in addition to the study by Finger et al. “”Quality of life in

AMD: a review of available vision-specific psychometric tools”". We propose that their literature search should not have focused solely on the specific eye disease AMD.

The literature search was partly replicated (PubMed) by using “”visual impairment”" Smoothened Agonist instead of “”macular degeneration”" as free text words. Psychometric information was obtained from the additional studies. Preliminary results from a differential item functioning (DIF) analysis used to examine the relationship between item responses on the Vision-related quality of life Core Measure (VCM1) of AMD patients versus patients with other eye conditions are discussed.

Eight studies of visually impaired patient populations, including AMD patients, are discussed, with psychometric information from six vision-specific questionnaires. The VCM1 items did not present DIF, which means that the items were equally interpreted by all patients.

The results on DIF and the additional studies presented here confirm that a specific eye disorder is of minor importance in the choice of a vision-specific questionnaire or, in this case, a literature search.”
“To investigate the long-term impacts of different posterior operations on curvature, neurological improvement and axial symptoms for multilevel cervical degenerative myelopathy (CDM), and to study the relationship among loss of cervical lordosis, recovery rate and axial symptom severity.

It has been concluded that the presence of the HAp nanoadditive i

It has been concluded that the presence of the HAp nanoadditive in the material of alginate fibers decreases their susceptibility to distortion in the drawing stage, which results in their tenacity

properties being lower by 2cN/tex than of the fibers with no nanoadditive. PLX3397 price The obtained nanocomposite fibers are characterised by a tenacity value exceeding 26 cN/tex, accompanied by high sorptive and water-retention properties of 90% and the even distribution of the nanoadditive on the fiber surface. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 114: 70-82, 2009″
“Nanocrystalline Pr2Co14B-based films are deposited on two types of substrates at 600 degrees C by radio frequency magnetron sputtering. All samples are composed of a hard magnetic phase Pr2Co14B and a small amount of a soft magnetic Selisistat inhibitor phase Co3B. The film sputtered on the thermally oxidized silicon wafer has a more dispersed distribution of Co3B and a smaller average grain size of Pr2Co14B than that deposited on alumina substrates; therefore, the former film shows a stronger intergrain exchange coupling action (IECA) than the latter

film. In addition, the coercivity (8.6 kOe) and ratio (0.68) of remanence to saturation magnetization of the film sputtered on thermally oxidized silicon wafers are considerably higher than those (0.4 kOe and 0.56) of the film deposited on alumina substrates. In the case of the film sputtered on alumina substrates, the size of most magnetic domains is comparable to the average grain size of magnetic phases, implying the occurrence of a weak IECA. However, in the case of the film sputtered on thermally oxidized silicon wafers, the size of most magnetic domains is considerably larger than the mean grain size of magnetic phases, indicating the occurrence of a strong IECA. The effect of the IECA on the coercivity of specimens is determined by analyzing the temperature dependence of coercivity in the framework of a nucleation

model.”
“Objective To determine whether dogs with head trauma have a greater incidence of seizures than the general canine patient population.

Design Retrospective case series.

Animals-259 client-owned CYT387 supplier dogs.

Procedures Medical records of dogs evaluated for head trauma at The Ohio State University Veterinary Medical Center from 1999 to 2009 were reviewed. Data were collected regarding the cause of the head trauma, physical examination and neurologic examination findings, comorbidities, and the development of seizures during hospitalization. A telephone survey was conducted to question owners regarding the development of seizures after discharge. Relationships between the nature of the head trauma and the development of seizures were then examined.

Results-3.5% of dogs with head trauma developed in-hospital seizures, and 6.

Each article was scored by three

reviewers in group forma

Each article was scored by three

reviewers in group format for each criterion and was assigned a score. Reviewers always came to a consensus before assigning a score.

Results. A total of 32 RCTs met the inclusion criteria for this review. The average modified CONSORT score was 65%. Disclosing certain criteria was associated with a higher overall score, including method of generation of random sequence (P < 0.000071), allocation concealment (P < 0.00014), inclusion of a flow chart or description of patient numbers at different stages (P < 0.00034), and identification of outcome Ubiquitin inhibitor measures (P < 0.00064).

Conclusion. Conclusions drawn from current randomized controlled trials in the spine literature may thus be difficult to interpret. Greater effort must be put into compliance with these guidelines to improve data quality.”
“Background: Single-strain rotavirus vaccine was added to TGF-beta inhibition the national immunization program in Mexico in May 2007. We assessed the impact of vaccination on the number of diarrhea-related hospitalizations in

Mexican children in 2008 and 2009.

Methods: We obtained data on all-cause diarrhea-related hospitalizations from January 2003 to June 2009 in Mexican children <5 years of age. We compared diarrhea-related hospitalizations during the 2008 and 2009 rotavirus seasons with the median number of diarrhea-related hospitalizations at baseline (2003-2006), before rotavirus vaccine introduction, at 306 Ministry of Health hospitals. We estimated

vaccine coverage using administrative data.

Results: A median number of 10,993 diarrhea-related hospitalizations (range: 9877-11958) occurred each prevaccine rotavirus season from 2003 to 2006 among children <5 years of age. Diarrhea-related Citarinostat order hospitalizations decreased by 11% (N = 9836) in 2008 and by 40% (N = 6597) in 2009. The greatest declines occurred in infants <12 months of age during 2008 (25%) and 2009(52%), with 1-dose rotavirus vaccination coverage of 74% and 89% during these years, respectively. A 43% decline was also noted among children 12 to 23 months of age during the 2009 season. No declines were noted during either 2008 or 2009 among unvaccinated children >24 months of age during the study period.

Conclusions: Marked declines in diarrhea-related hospitalizations among vaccine-eligible Mexican children <24 months of age have occurred during the first 2 complete rotavirus seasons following rotavirus vaccination. Rotavirus-specific surveillance and epidemiologic studies are necessary for a better understanding of the changes in disease epidemiology and public health impact from rotavirus vaccination.”
“Recent studies have suggested that CRP may interfere with insulin signaling in skeletal muscle and endothelial cells.

The “”clinical diagnosis of lipodystrophy”" and the “”clinical sc

The “”clinical diagnosis of lipodystrophy”" and the “”clinical scoring system”" GSK1210151A clinical trial had too many false-positive and false-negative results. Triceps skinfold thickness (SFT)/BMI

ratio <= 0.49 and abdominal SFT/triceps SFT ratio > 1.385 have good sensitivity but poor specificity in identifying lipodystrophy. In comparison with HAART-naive patients with HIV, those receiving HAART had significantly higher insulin resistance, and a significantly greater proportion had impaired glucose tolerance and dyslipidemia. Among patients receiving HAART, those with lipodystrophy had a greater degree of insulin resistance, higher triglyceride levels, and lower levels of high-density lipoprotein cholesterol.

Conclusion: The trunk fat/lower limb fat mass ratio in BMI-matched normal subjects can be used to derive cutoff values to define lipodystrophy objectively in HIV-infected patients. Defining lipodystrophy in this way is better

than other methods of identifying those patients with increased cardiovascular risk. Triceps SFT/BMI and abdominal SFT/triceps SFT ratios may be useful as screening tools in resource-poor settings. (Endocr Pract. 2012;18:158-169)”
“Objective: Neuroendoscopic surgery in children has particular features and is associated with different success rates (SR). The aim of this study was to identify putative factors that could influence the outcome in pediatric patients. Methods: Clinical data of 177 patients under Tubastatin A clinical trial 18 years of age submitted to 200 consecutive neuroendoscopic procedures from January 2000 to January 2010 were reviewed. Results: The overall success rate was 77%. Out of the patients with successful outcomes, 46% were under six months, 68% were between six months and one year of age, and 85% older than one year. Neuroendoscopic techniques provide very good results for a wide number of indications in children.

Tumor-related LY2835219 cell line cerebrospinal fluid (CSF) circulation problems and aqueductal stenosis seem to be particularly well suited to neuroendoscopic treatment regardless of the patient’s age. Conclusion: Patients’ age and etiology of hydrocephalus were associated with a different outcome. In all cases, surgical experience is extremely important to reduce complications.”
“Background: We reviewed our experience with penetrating renal injuries to compare nonoperative management of penetrating renal injuries with renorrhaphy and nephrectomy in light of concerns for unnecessary explorations and increased nephrectomy rates.

Methods: In this retrospective study, we reviewed the records of 98 penetrating renal injuries from 2003 to 2008. Renal injuries were classified according to the American Association for the Surgery of Trauma and analyzed based on nephrectomy, renorrhaphy, and nonoperative management. Patient characteristics and outcomes measured were compared between management types.

8 without probenecid; r(2) = 0 7 with probenecid) This relations

8 without probenecid; r(2) = 0.7 with probenecid). This relationship allows for the prediction selleck products of systemic cidofovir exposure in individual patients and may be utilized to evaluate exposure-response relationships to optimize the cidofovir dosing regimen for BKV infection.”
“Purpose of review

Steroid-resistant nephrotic syndrome/focal segmental glomerulonephritis (FSGS) is the primary renal disease in approximately 10% of pediatric patients receiving a renal

allograft. Risk factors for recurrence are a chronological age between 6 and 15 years at onset of the nephrotic syndrome and a rapid progression of the disease in the native kidneys leading to end-stage renal disease in less than 3 years. With rapid recurrence of FSGS and loss Selleck Small molecule library of the allograft, further renal transplants also carry a high likelihood of recurrence of nephrotic syndrome.

Recent

findings

Different pathogenic factors have been discussed for the recurrence of proteinuria/FSGS in the transplanted kidney, especially the involvement of a proteinuric circulating factor. Treatment strategies are divided into two phases: induction of remission by plasma exchanges combined with high-dose intravenous or oral cyclosporine A; stabilization of remission by cyclophosphamide or rituximab, which showed promising results in several case reports.

Summary

No controlled studies have been performed yet to address the management of recurrent FSGS posttransplant. Complications related to the high-degree immunosuppression are not rare and should be regularly investigated. Therefore, the benefit : risk ratio for all immunosuppressive treatment strategies should be carefully evaluated for each individual patient.”
“Background. Respiratory syncytial selleck chemical virus (RSV) is a common cause of seasonal respiratory viral infection in hematopoietic stem cell transplantations (HSCT) patients. The efficacy of treatment, however, remains controversial. We describe an outbreak of 31 cases of RSV that occurred in an HSCT outpatient care unit in the fall season from March through May 2010, with a good outcome without any

specific antiviral treatment.

Methods. During these 3 months, 222 nasal wash samples were tested and, of these, 31 outpatients were positive for RSV. In 2009, 99 samples had been tested and only 10 outpatients were positive for RSV in the same period.

Results. Seven (22.5%) patients had severe neutropenia (<500 cells/mu L); severe lymphopenia (<200 cells/mu L) was present in 13 (41.9%) patients, and 14 (45%) had received intravenous broad-spectrum antibiotics. Hospitalization was necessary only for 8 patients (25.8%); 20 had lower respiratory tract infection (64.5%). Only 1 patient died as a result of proven invasive aspergillosis.

Conclusion. This report suggests that HSCT outpatients with no risk factors may not always require specific treatment for RSV.

[doi: 10 1063/1 3331988]“
“Purpose:

[doi: 10.1063/1.3331988]“
“Purpose: click here The objective of this study was to develop

an oral assessment tool for evaluating the appetite of patients with head and neck cancer receiving radiotherapy, who had dysgeusia, xerostomia, and oral mucositis, as well as to verify its validity and reliability.

Methods and sample: A draft oral assessment tool, which included a 5-point scale and 19 items, was prepared based on an interview survey of 30 patients. The resultant questionnaire survey was provided to 209 subjects.

Results: On the basis of factor analysis of construct validity, 3 factors (dysgeusia and loss of favors), (salivation abnormality and loss of moisture in the oral cavity), and (pain in the oral cavity and lack of motivation) comprising 14 items were adopted for the final survey. Lonafarnib in vivo During a review of criteria validity, a correlation was found between the scores of the three factors and overall oral assessment tool, and the

scores of taste sensitivity, xerostomia, oral mucositis, and appetite with a correlation coefficient of r = 0.41-0.89 (p < 0.01). With regard to reliability, stability was determined as 0.87 (p < 0.01) according to test retest study results. Internal consistency was confirmed by a Cronbach’s alpha coefficient of 0.83 (p < 0.01) and an interclass correlation coefficient of 0.80 (p < 0.01).

Conclusions: On the basis of the validity and reliability of the oral assessment tool developed, it has been found to be practical for use in the assessment of appetite of patients with head and neck cancer. (C) 2012 Elsevier Ltd. All rights reserved.”
“The friction coefficient of the sulphur-prevulcanized natural rubber (SPNR) film could be effectively reduced by deposition of poly(methyl methacrylate) (PMMA) check details particles. The nanoscale surface roughness of rubber, determined by atomic force microscope, was directly proportional to the particle size of PMMA particle

at 12% surface coverage (Cs). The %Cs and surface roughness of the modified SPNR increased, while the friction coefficient decreased, with increasing PMMA latex concentration and immersion time. By using a mixture of latexes having both large and small sizes, the increase in the amount of small particles resulted in the better distribution of large particles deposited on the rubber surface. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 115:3680-3686, 2010″
“The formation of the nanocrystalline rocksalt ZnO (rs-ZnO) has been in situ studied by x-ray diffraction with synchrotron radiation at high pressure and high temperature. A number of rs-ZnO/MgO nanocomposites with preset grain size were synthesized at 7 GPa and 800 K starting from wurtzite ZnO nanoparticles or nanorods. The use of MgO matrix allowed us to recover metastable rs-ZnO in the nanocrystalline form at ambient pressure.