Among the goals of efficient management, guaranteeing tree recrui

Among the goals of efficient management, guaranteeing tree recruitment should be prominent. Wherever grazing proves to be a major limiting factor for seedling survival, livestock should be banned from some regeneration areas in

the forest. Reafforestation projects, establishing or expanding local nurseries for the production of high quality seeds and seedlings of native species (NAST, 2010), could also be promoted with the aim of increasing the forest cover. To thoroughly assess all these issues, further field-based research investigating the interaction between vegetation and environmental factors, as modified by anthropogenic interference, is highly recommended. The establishment of permanent research plots for long-term monitoring of the effects of environmental and human-induced factors on silvo-pastoral systems should be strongly encouraged, taking into account the possible HSP activation impacts of the on-going climate change in the area (NAST, 2010, Nepal, R428 2013 and McDowell et al., 2013). Sustainable forest management of national parks with increasing human pressure from tourism activities

is currently a real challenge for land managers and scientists. In these protected areas the simplification of the forest structure is often more important than deforestation. This reduction of structural diversity, often called forest degradation, is in fact less obvious than deforestation, and for this reason more difficult to detect and manage. Research studies on the main causes and impacts of forest overexploitation should be promoted in other sensitive areas in order to contribute to increasing forest resilience and reversing the process

of environmental degradation. Forest degradation at Sagarmatha National Park has mostly resulted from the intensive thinning and overexploitation of small size rhododendron trees from the most accessible sites. Increased trekking tourism intensified shrub removal (especially Juniperus wallichiana) and exploitation for firewood, but the establishment of the SNP in 1976 delocalized human pressure to the Pharak forests that recently (2002) became the Buffer Zone of the SNP. In the absence of a sustainable land use policy Acetophenone tourism can be a major driver of forest degradation. This issue is observed globally in many other protected areas where trekking tourism is responsible for socio-cultural changes that indirectly affect the traditional use of natural resources. Nowadays unregulated logging is one of the main causes of the lower diversity and density measured in the BZ, the current use of forest-related resources thus appears largely unsustainable and needs to be planned. A sustainable management of forest resources at SNP is imperative and should integrate different management actions (e.g. reafforestation projects, adaptive silvicultural practices and regulating livestock grazing), at the same time implementing a greater use of alternative energy sources.

Many of the themes that were expected to be raised during analysi

Many of the themes that were expected to be raised during analysis had been identified in the literature review [14] which explored the potential effects of seeing and sharing experiences online. The secondary analysis sought to

gain a deeper understanding of existing (‘anticipated’) themes found in the literature whilst being mindful of any new (‘emergent’) concepts which arose. Indexing took place within NVIVO and charting was carried out using EXCEL. Charting the data involved lifting the data verbatim to facilitate the use of participants own words when forming items. Themes were checked for applicability across three condition groups PF-02341066 clinical trial and three different types of health websites to ensure its suitability for inclusion in a generic item pool. Two sources of data were used to check the themes identified for the measure: (1) Focus group transcripts (n = 16) from research carried out on trust and online health information in Northumbria University (see [23] for methodology) and; (2) Comment forms (n = 29) completed by members of

an internet user panel consisting of lay persons using local primary health care services. The user panel comment forms asked people to list the potential advantages and disadvantages of using the internet for health information. Comments were collated in a single document to compare issues raised with the themes previously identified. Using more than one data source provided ‘data triangulation’ to enhance rigor Selleckchem PLX4032 within the research [24]. Each theme identified through the

analysis was represented by relevant statements (in the form of verbatim quotes) from the HERG transcripts. Statements were arranged according to the theme in a tabulated summary which identified the health condition from where it originated. This allowed each statement to be traced to its origin throughout the iterative process. Statements which could be answered by people across health conditions (i.e. generic statements) were identified. The authors recast statements as questionnaire items and removed duplicate Staurosporine in vivo items. Items were reviewed by an advisory board consisting of six clinicians and academics with interests in the field of e-health. Reviewers were asked whether items were answerable to those exposed to websites containing: (1) experiential health information, (2) standard ‘facts and figures’ health information and; (3) patients online health forums. Reviewers were also asked to comment on whether items were suitable for individuals who were viewing a website which was aimed at: (1) long term conditions, (2) health promotion activities and; (3) carers.

2010),

these two flows have quite different dimensional a

2010),

these two flows have quite different dimensional and non-dimensional dynamic parameters. The Słupsk Furrow gravity current has a larger width W   (25 km vs. 10 km) and thickness H   (34 m vs. 11 m) and a smaller mean downstream interfacial slope Sx′   (1.5 × 10−4 vs. 5.0 × 10−4), bulk buoyancy B   (0.034 m s−2 vs. 0.07 m s−2), friction velocity u* (0.015 m s−1 vs. 0.02 ms−1), bulk flow velocity U   (0.3 m s−1 vs. 0.5 ms−1), Froude number Fr (0.27 vs. 0.54) and Ekman number Ek=(u′*2U−1f−1H−1)2(2.7×10−2vs.≈1). Though Ek ≪ l in the case of Słupsk Furrow, both B-Raf inhibitor drug gravity currents can be regarded as frictionally controlled, because the Ekman depth δE = 0.4u*/f exceeds H ( Umlauf & Arneborg 2009a). That is why in both cases the transverse structure of the gravity current is characterized by the presence of a thin interfacial jet directed to the right of the down-channel flow. Note that in the case when the Ekman layer thickness is much smaller than the channelized gravity flow itself, the transverse velocity structure does

not display a thin interfacial jet but a secondary flow field consisting of frictionally induced Ekman transports across the channel in the benthic and interfacial boundary layers and a return flow in the interior ( Cossu et al. 2010). The small value of the Froude number in the Słupsk Furrow gravity current relative to that of the Arkona Basin (Fr = 0.27 vs. Fr = 0.54) implies a reduced amount Thalidomide of entrainment in the former case. To estimate the entrainment of surrounding waters to a gravity Epigenetics inhibitor current, one can use a new empirical parameterization suggested by Cenedese & Adduce (2010) based on laboratory and field measurements equation(4) E=Min+A Frα1+ACinf(FR+FR0)α,Cinf=1Max+1Reβ,where E = we/U is the entrainment ratio, we is the entrainment velocity, Re = U H/v is the Reynolds number, v ≈ 1.3×10−6 m2 s−1 is the kinematic molecular viscosity of water, and Min = 4 × 10−5, Max = 1, A = 3.4 × 10−3, Fr0 = 0.51, α = 7.18 and β = 0.5 are empirical constants based on the limited oceanographic and laboratory data available. Substituting the above parameters of gravity flows into

equation (4) one obtains E = 4.03 × 10−5 ≈ Min for the simulated gravity flow in the Słupsk Furrow and E = 8.0 × 10−5 for the Arkona Basin gravity current. Therefore, the entrainment in the Słupsk Furrow is twice as small as that of the Arkona Basin. Note that the last estimate (E = 8.0 × 10−5) is close to the observed value E = 6.6 × 10−5 ( Arneborg et al. 2007). The simulation of the same flow using MIKE 3 yielded results almost identical to those of POM (cf. Figures 4 and 6). The only difference worth mentioning is an inverted, hydrostatically unstable salinity/density stratification in BBL simulated with MIKE 3 instead of the vertically uniform stratification simulated with POM. This difference can be interpreted as follows.

Its highly productive waters [4] and [5] draw millions of seabird

Its highly productive waters [4] and [5] draw millions of seabirds to nest in the area [6], and millions more migrate through in spring and fall. The Bering Sea stock of bowhead whales (Balaena mysticetus), the Beaufort and East Chukchi Sea stocks of beluga whales (Delphinapterus leucas), and the majority of the world׳s Pacific walrus (Odobenus rosmarus divergens) migrate through the Bering Strait PARP inhibitor [7], [8] and [9]. Gray whales (Eschrichtius robustus), humpback whales (Megaptera novaeangliae), minke

whales (Balaenoptera acutorostrata), bearded seals (Erignathus barbatus), ringed seals (Phoca hispida), spotted seals (Phoca largha), ribbon seals (Phoca fasciata), Steller sea lions (Eumetopias jubatus), and other marine mammals can be found here, year round or seasonally [8], [10], [11] and [12]. The region׳s communities include Chukchi, Iñupiaq, St. Lawrence Island

Yupik, Siberian Yupik, and Yup’ik peoples, who continue to practice traditional ways of harvesting food and materials from the sea [13], [14], [15] and [16], and whose rights as indigenous peoples are recognized by national and international laws and practices (e.g., the United Nations Declaration on the Rights of Indigenous Peoples). In short, the stakes are high for ensuring sound management of shipping activities. The management context, however, is not simple. A recognized “international strait” under the United A-1210477 molecular weight Nations Convention on the Law of the Sea (UNCLOS), the Bering Strait is subject to special rules designed to ensure that vessels of all nations have relatively unimpaired access through the strait. The International Maritime Organization (IMO) is a specialized agency within Selleck Cobimetinib the United Nations that, among other things, facilitates the adoption and implementation of regulatory measures in international straits where freedom of navigation jeopardizes vessels, people, or the environment,

and when those measures are agreed upon by the states bordering the strait. Under this legal regime, coastal states adjacent to an international strait have limited ability to act unilaterally to impose mandatory regulations on international vessels passing through that strait, but voluntary measures can be recommended and domestic measures can be imposed on vessels subject to the jurisdiction of the country passing those regulatory measures [17]. There is no question that more vessels will transit the Bering Strait in the years to come. What must be determined is how that traffic can be managed in a way to minimize impacts to unique local environments and cultures encompassing some of the world׳s great concentrations of marine mammals and birds and thousands of coastal indigenous people, while realizing the economic benefits that trade and activity can bring, and whether new management regimes can be designed and implemented proactively rather than waiting for a disaster to happen first [18].

v contrast agent (CA) administration Six volunteers were includ

v. contrast agent (CA) administration. Six volunteers were included in the study (two men, four women; age range, 20.8–28.1 years; mean BMI of 21.95, BMI range, 20.03–24.22). Volunteers were recruited both at the Bernhard-Gottlieb University Clinic of Dentistry, Department of Orthodontics and at the High Field MR Centre of the Medical INK 128 University of Vienna. The local ethics committee approved this study and all volunteers gave written, informed consent. Prior the inclusion of the volunteers into the study, TMJ status of each individual volunteer was inspected

by the experienced radiologist (S.T. – 18 years of experience in radiology). Only those volunteers, which were clinically asymptomatic and had physiological disc position, were enrolled into this study. MR examinations were performed on a 3 T whole-body Magnetom TimTrio scanner (Siemens Healthcare, Erlangen, Germany) equipped with gradient coils that provided a gradient field of 40 mT/m, TGF-beta inhibitor slew rate of 200 mT/m/s. Volunteers lay supine with the head fixed to the flexible eight-channel multi-element coil (Noras, Würzburg, Germany). Coil elements were in close touch with the volunteer`s face, preventing motion of the volunteer`s head during the exam. A bolus of a double dose 0.2 mmol/kg of Gd-diethylenetriamine

pentaacetic acid ion (Gd-DTPA)2-, i.e. 0.4 mL of Magnevist™ per kg body weight (Bayer Vital GmbH, Leverkusen, Germany) was administered to the volunteers after the initial native measurement. A parasagittal slice orientation was used in the inversion recovery as well as the 3D-GRE

technique (Fig. 1). Fig. 2 shows the morphology of the TMJ. Three volunteers were examined using 2D inversion Montelukast Sodium recovery protocols (Fig. 3), and the other three volunteers were examined using a 3D-GRE dual flip angle technique (3D-GRE). Fig. 4 shows an example of a T1 map calculated from the data measured by the 3D-GRE dual flip angle technique. For the 2D inversion recovery sequences, the MR protocol consisted of nine different inversion recovery measurements, with a 2D multi-slice, inversion recovery, spin-echo technique with inversion times as follows: [60, 100, 200, 300, 400, 500, 1000, 1500, 2500 ms]; TR set to 5000 ms; TE of 8.1 ms; number of slices 4; slice thickness 3 mm; spectral width 260 Hz/pixel; matrix size 384 × 384; flip angle 180 degrees; pixel resolution 0.52 × 0.52 mm; a total acquisition time of 2 min 57 s for IR of 60 ms, up to 4 min 23 s for an IR time of 2500 ms; and an FOV of 199 × 199 mm. The TR parameter increased with inversion time increases, maintaining TR constant. In order to perform rapid (fine time-resolved) contrast agent uptake measurement, fast 3D-GRE was performed. The Siemens built-in B1 mapping was automatically performed before the first 3D-GRE measurement. The resulting B1 map was used for automatic image correction.

Therefore, the purpose of the present experiments was to test the

Therefore, the purpose of the present experiments was to test the role of the NPY Y2-R in food foraging, food hoarding, and food

intake in Siberian hamsters. To do so we asked two questions: (1) Selleck Protease Inhibitor Library Does antagonism of NPY Y2-R using BIIE0246 increase ingestive behaviors in fed animals and (2) does agonism of NPY Y2-R using the naturally-occurring PYY(3-36) inhibit the food deprivation-induced increases in ingestive behaviors? Two separate cohorts of 40 male Siberian hamsters 2.5–3 months of age and weighing 35–45 g were selected from our breeding colony. After weaning animals were group housed according to sex and raised in a long day photoperiod (16L:8D, light offset: 1900) with ad libitum access to rodent chow (LabDiet® 5001, Purina, St. Louis, MO) and tap water unless otherwise indicated. Room temperature was maintained at 21 ± 2 °C. Each cohort

was treated identically. All procedures were approved by the Georgia State University Institutional Animal Care and Use Committee and were in accordance with Public Health Service and United States Department of Agriculture guidelines. Animals were transferred 3-deazaneplanocin A to the foraging and hoarding room where they were singly housed in shoebox cages 290 mm × 180 mm × 130 mm (length × width × height), maintained in a 16L:8D photoperiod (light offset: 1330), and with ad libitum access to the pelleted test diet (DPPs, NADPH-cytochrome-c2 reductase Purified 75 mg pellets; Bio-Serve, Frenchtown, NJ) and water. After two weeks to acclimate to the new light offset, animals were placed into the foraging and hoarding apparatus modified from Perrigio and Bronson [39] and previously described [19]. Briefly, a bottom, “burrow”, cage 290 mm × 180 mm × 130 mm

(length × width × height) containing Alpha-Dri bedding (Specialty Papers, Kalamazoo, MI) and one cotton nestlet (Anacare, Belmore, NY). The bottom cage was opaque and covered to simulate the darkness of a burrow. The top, “foraging”, cage 456 mm × 234 mm × 200 mm (length × width × height) was equipped with a pellet dispenser, running wheel (525 cm circumference), and ad libitum access to water. The two cages were connected via convoluted polyvinyl chloride tubing (38.1 mm inner diameter and ∼1.52 m long). Wheel revolutions were counted using a magnetic detection system with monitoring by a hardware/software computer interface (Med Associates, Georgia, VT). Hamsters were acclimated/trained to this apparatus for one week prior to and after cannulation (see below). We used an acclimation/training regimen that minimizes changes in body mass and food intake that can occur when initially housed in the foraging and hoarding apparatus. Specifically, hamsters were given free access to food pellets and were able to earn a food pellet for every 10 wheel revolutions.

” We hypothesized

” We hypothesized find more that Boston Bowel Preparation Scale (BBPS) scores

could provide a way to standardize the concept of “adequacy”. We performed a retrospective analysis of average-risk screening colonoscopy reports submitted to the Clinical Outcomes Research Initiative (CORI) data repository between 10/2009 and 8/2012. We included only reports documenting a BBPS score and a recommendation for timing of the next colonoscopy and excluded procedures with polyps. We evaluated recommended follow-up intervals stratified by total and segment BBPS scores. We also presented 4 standardized colonoscopy videos with varying degrees of bowel cleanliness to participants of the BBPS Educational Program, a web-based program demonstrating the BBPS, and asked for recommended colonoscopy follow-up intervals. Among 3226 average risk colonoscopies with a BBPS score, 1340 (41.5%) had polyps and 601 (18.6%) lacked follow-up recommendations and were thus excluded. The remaining 1285 procedures, performed by 55 endoscopists, had a median (interquartile range) BBPS score of 8 (7-9). Median recommended follow-up time decreased as BBPS scores decreased, with a sharp drop-off below a BBPS

score of 6 (see Figure). Among reports with total BBPS score of 6 or 7 (n=364), 17 (5%) contained a segment score of 0 or 1 and were associated with shorter median follow-up time compared to reports in which all segment scores were ≥2 (5 vs.10 years, P<.001). Whenever any colonoscopy selleck compound contained a single segment score of 1 (n=55), that segment’s location (right, left, transverse colon) had no impact on recommended follow-up intervals (P=0.955). Video cases were reviewed by 119 endoscopists, including LGK-974 datasheet 39 CORI users, 51 non-CORI US endoscopists and 29 international endoscopists. Recommended follow-up time decreased as BBPS scores decreased (P<.001; see Table). There was no difference in recommended follow-up time by location

of practice, although more US participants (87%) recommended 10 year follow-up compared to international participants (52%) for Case D (P=.0012). BBPS scores correlate with endoscopist behavior regarding follow-up intervals for colonoscopy. Because BBPS scores have previously been shown to have excellent inter-rater agreement, a total BBPS score ≥ 6 and/or all segment scores ≥ 2 provides a standardized definition of “adequate” when describing bowel cleanliness. Recommended follow-up interval for next colonoscopy for video cases among endoscopists who agreed on the Boston Bowel Preparation Scale score for each case “
“Despite advances in bowel preparation methods, the quality of bowel preparation in patients undergoing colonoscopy remains unsatisfactory. The time point chosen for improvement of education may be important for adequate bowel preparation. To evaluate the effect of telephone re-education on the day before colonoscopy (instead of the day of appointment – regular appointment) on the quality of bowel preparation and colonoscopic findings.

However this suggestion involves the visual word form system main

However this suggestion involves the visual word form system maintaining its efficacy, even in the presence of widespread dysfunction at lower levels of the visual system.

Irrespective of whether the observed reading is attributable to preservation of the word form and/or aspects of parallel letter processing, the performance of these two PCA patients represents an impressive demonstration of the resilience and efficiency of the reading system in the face of profound visual dysfunction. We would like to thank FOL and CLA for the patience and good humour during the completion of this study. This work was undertaken at UCLH/UCL who received a proportion of funding from the Department of Health’s National Institute for Health Research (NIHR) LEE011 Biomedical Research Centres funding scheme. The Dementia Research Centre is an Alzheimer’s Research UK Co-ordinating Centre. This work was supported by an Alzheimer’s Research UK Senior Research Fellowship to SC. JDW is supported by a Wellcome Trust Senior

Clinical Fellowship (Grant No. 091673/Z/10/Z). “
“The majority of people with aphasia have difficulty in finding or producing words and this can be a significant cause of breakdown in conversation (e.g., Perkins et al., 1999). There is a large and growing body of evidence demonstrating that intervention ATM Kinase Inhibitor can help improve word retrieval or word production (see Nickels, 2002 for

a review). However, the majority of interventions result in change primarily on treated items (e.g., Abel et al., 2005; Fillingham et al., 2006; Laganaro et al., 2003; Wisenburn and Mahoney, 2009). Given these fairly consistent findings a key question of both clinical and theoretical importance arises: what pattern(/s) of strengths and difficulties leads to generalisation to untreated items? The answer to this question may inform clinical practice and our understanding of how intervention is altering word retrieval/production. There are several models of ‘speech production’, more recently and accurately termed ‘language production’ ranging from classic ‘box and arrow’ models (Ellis and Young, 1988; Kay et al., 1992) to connectionist models (Dell et al., 1997; Goldrick mafosfamide and Rapp, 2002; Levelt et al., 1999). While the models vary considerably in their specification, in relation to retrieving single words for production, all require the following three stages: (1) Lexical-semantic processing or accessing word meaning (sometimes termed ‘lexical semantics’ and usually distinguished from ‘conceptual semantics’) In this paper ‘word (or, for connected speech, language) production’ will be used to refer to all three stages of processing. Thus, ‘word production’ incorporates retrieving the word’s meaning and form and abstract phonological encoding.

As the acquisition starts immediately, a

center out, non-

As the acquisition starts immediately, a

center out, non-Cartesian, sampling of k-space is required as there is no time for a phase encode gradient or de-phasing read Target Selective Inhibitor Library mouse gradient [24]. Typically k-space is sampled radially however, spiral sampling has also been used for samples with a somewhat longer signal lifetime [6]. A center out sampling pattern is desirable as it minimizes the echo time and ensures maximum signal sampled at the center of k-space. A drawback of non-Cartesian sampling is that it prevents the use of the fast Fourier transform (FFT), and therefore image reconstruction becomes prohibitively time consuming for many images. To overcome this limitation, “re-gridding” techniques have been developed to interpolate the measured signal onto a regular Cartesian grid which can then be transformed using the FFT [27]. It is important to choose the convolution function for this interpolation process accurately. Theoretically, a sinc function of infinite extent should be used, however, this is not practical. Common alternative convolution functions include truncated sinc interpolation, Kaiser–Bessel interpolation

and min–max interpolation [28] and [29]. Such re-gridding techniques permit image reconstruction in almost the same time as with Cartesian sampling. Cisplatin nmr Non-Cartesian sampling, especially radial sampling, acquires data non-uniformly throughout k-space. In the case of radial sampling, many more points are acquired at the center of k-space (i.e. in the low spatial frequency region). If all data points are weighted equally, the Fourier transform would be biased to these low frequency data resulting in a low spatial resolution, or heavily blurred, image. Density compensation is used to overcome this limitation [30]. Density compensation considers the sampling density throughout k-space

and uses a weighting function to correct for this. For radial sampling the weighting function will increase the contribution of the points around the edge of k-space prior to re-gridding and Fourier transformation. Re-gridding with density compensation alone can produce blurring and artifacts in the reconstructed image, especially if the number of lines in the radial sampling pattern is small. An alternative approach is to iteratively reconstruct the image based Cell Penetrating Peptide on the a priori assumption that the unknown spin proton density image is sparse with respect to a specific representation. This assumption results in nonlinear optimization methods such as CS [3], [16], [17], [18] and [19]. All experiments were performed using a Bruker, AV400 spectrometer, operating at a 1H resonance frequency of 400.23 MHz. A three-axis, shielded gradient system with a maximum strength of 146 G cm−1 was used for gradient encoding, and a 25 mm diameter birdcage r.f. coil was used for excitation and signal detection.

Data from a repeated dosing sub-acute,

sub-chronic or chr

Data from a repeated dosing sub-acute,

sub-chronic or chronic inhalation study are ideal. If data are limited, extrapolation from studies on a structurally related and biologically inert chemical may be useful. On the basis of such data a safe air concentration based on BMS-387032 datasheet experimental data may be estimated. Other ingredients in cosmetic sprays are usually present at low levels so that exposure is likely to be low. Analogous to the approaches described above, all ingredients need to be evaluated. Particular attention should be given to potential human inhalation exposure to fine droplets of lipophilic/oily substances, since such formulations may produce the so-called “acute respiratory syndrome” in exposed humans (Vernez et al., 2006). Mucosal irritation can be caused by reactive chemical species. Water-soluble and hydrophilic compounds tend to remain in the mucosa of the upper airways, while more lipophilic and less water-soluble substances may penetrate deeper into the lung. Two types of irritation can be distinguished: a) irritation of nerve endings in the upper respiratory tract without adverse changes in pulmonary tissue (sensory irritation) or b) local toxic effects producing local adverse changes in pulmonary tissue(s). The irritation potential of a given chemical may be evaluated based on standardised inhalation toxicity studies in rodents or by employing mathematical

models which Etofibrate take into consideration known data on lung irritants. Also in vitro eye or skin irritation tests may

be helpful to evaluate a potential sensory ALK phosphorylation irritation of the ingredient (Weight-of Evidence Approach). In the EU, known respiratory irritants are labelled with the hazard statement H335 (former risk phrase R37); irritates respiratory organs/respiratory irritant (EU Regulation 1272/2008, European Parliament and Council, 2008; former Council Directive 67/548/EEC). The majority of these chemicals are listed in ChemDat (Merck Chemie Datenbank, Editor: Merck KGaA, 64271 Darmstadt, 2000) and in TRGS 900 (BAuA, 2006) and carry at least one other warning label regarding irritation hazard effects on eyes, skin, etc. (H314, H319, H318, H315; former R34, R35, R36, R41, R38). However, one may assume that most substances which are irritant to the skin or eyes may also possess a potential being a respiratory irritant. The new EU Regulation 1272/2008 (Regulation on classification, labelling and packaging “CLP Regulation” which is currently implemented stepwise and which uses a different nomenclature for risk phrases has to be considered in future. This Regulation is in line with the UN Globally Harmonized System of Classification and Labelling of Chemicals (quoted in the EU Regulation 1272/2008). Due to the huge surface area of the lung significant systemic absorption of ingredients are likely, especially when they reach the alveoli.