Coastal environments in particular were not only seats of technol

Coastal environments in particular were not only seats of technological innovation in prehistory with historical trajectories unique from interior agricultural societies (e.g., Sassaman, 2004), but also entry points for European colonization of the North American continent and “ground zero” for hunter-gatherer

entanglements with Spanish missions (Thompson and Worth, 2010:79). Hydroxychloroquine in vitro Mission farming, similar to settler communities and plantation economies, introduced a host of new species into the environs, including foreign cultigens such as wheat, barley, corn, grapes, various fruit trees, and an assortment of vegetables, as well as the inadvertent release of weeds that thrived in open, disturbed soils. As Crosby (2004:167–169) noted, many of the exotic weeds rapidly spread across the landscape, often outcompeting native species particularly where ground disturbances had occurred, such find more as in plowed or fallow fields, along roads, and after fires. The creation of the colonial agrarian landscape also often involved

the construction of dams and irrigation canals, which modified the local hydrology of valleys. The ranching economy associated with missions and other colonies also unleashed an assortment of livestock into the hinterland of mission settlements where they roamed relatively freely, with fences built to keep them out of specific places (such as fields, gardens, orchards). Hardy, feral populations of pigs, cattle, and horses typically took root in the peripheries of mission settlements. Free range livestock, both controlled and feral, grazed largely Progesterone unhindered across the landscape,

where they consumed, disturbed, and trampled native vegetation (Crosby, 2004:172–182). Crosby (2004:288–290) described the co-evolution that took place between free range grazers and weeds, with the former providing the soil disturbance in which weeds thrived and multiplied, which in turn were consumed and carried to new places by the free roaming animals. Deforestation was a common practice not only in plantations, but also in agrarian mission complexes and settler colonies, whose occupants burned and felled trees to clear areas for fields and buildings, and who relied on wood as the main source of fuel in colonial settings (Cronon, 1983:116–121; Grove, 1997). The commercial exploitation of timber was also initiated in early modern times for shipbuilding, building supplies, and cordwood. The combination of these activities resulted in extensive deforestation beginning in the 1600s and continuing through the early 1800s, not only in the core-states where intensified agrarian production was taking place (see Richards, 2003:221–222 for an example from Britain), but across many of the colonial territories, particularly in the Caribbean, India, and South Africa.

After the incubation, the cells were centrifuged at 10,000g for 3

After the incubation, the cells were centrifuged at 10,000g for 30 min at 4 °C, and the supernatant was collected and filtered through a 0.2 μm Millipore membrane. The absorbance was determined in a spectrophotometer DU-800 (Beckman Ion Channel Ligand Library ic50 Coulter, Fullerton, CA, USA) by the difference in absorbance at wavelengths 414 and 600 nm. The results are expressed in nmol cytochrome c released/106 cells using a molar extinction coefficient (ɛ) of 100 mM−1 cm−1. The assessment of caspase 3 activity was performed using a Caspase 3 assay kit (Sigma–Aldrich). The hepatocytes

were collected and centrifuged at 600g for 5 min and suspended in 1 mL of phosphate buffered saline (PBS). Further centrifugation was performed, and the precipitate was incubated for 15 min at 4 °C

with 200 μL of lysis buffer for the release of caspase 3, and 300 μL of PBS was then INK1197 cell line added. The lysed cell suspension was centrifuged at 14,000g for 15 min at 4 °C, and the supernatant was collected. Aliquots of 50 μL of supernatant were used to assess the activity of caspase 3 according to the manufacturer’s instructions. Fluorescence was determined using the fluorescence spectrophotometer RF-5301 PC (Shimadzu, Tokyo, Japan) at wavelengths of 360 and 460 nm for excitation and emission, respectively. The results are expressed as pmol of AMC/min/mL. Samples of cells (200 μL) were collected and centrifuged at 50g for 5 min, and the precipitate was suspended in Krebs/Henseleit medium, pH 7.4, and incubated with Hoechst 33342 (8 μg/mL) and Propidium Iodide (5 μM) dyes for 15 min at room temperature in the dark. After incubation, the samples were

centrifuged Anacetrapib twice at 50g for 5 min to remove excess dye. After the washes, the hepatocytes were suspended in 50 μL of Krebs/Henseleit medium, pH 7.4. The cells were analyzed with a fluorescence microscope (DM 2500 type, Leica, Rueil-Malmaison, France), and the percentage of necrotic cells was quantitated using the Qwin 3.0 software. Data are expressed as the mean ± standard error of the mean (S.E.M.). The statistical significance of the differences between control and the experimental groups was evaluated using one-way analysis of variance (ANOVA) followed by Dunnett’s test, and differences between the experimental groups at the same time points was evaluated using unpaired t test with Welch´s correction. Values of P < 0.05 were considered to be significant. All statistical analyses were performed using GraphPad Prism software, version 4.0 for Windows (GraphPad Software, San Diego, CA, USA). Fig. 1 shows the inhibitory effect of ABA on the glutamate-plus-malate-supported and succinate-supported state 3 (ADP-stimulated) respiration of mitochondria in digitonin-permeabilized hepatocytes.

The characterized Form II enzymes discriminate less between CO2 a

The characterized Form II enzymes discriminate less between CO2 and O2 than do Form I enzymes ( Pearce, 2006 and Tabita et al., 2007). Oxygen concentrations in Guaymas Basin mats may be more consistently low than those in tidal mudflats or freshwater ditches; in situ

microelectrode profiles showed O2 concentrations between zero and ~ 25 μM above and within Guaymas mats ( Gundersen et al., 1992). Carbon fixation efficiency may also be of less competitive importance in the deep-sea mat environment, which is abundantly supplied with dissolved inorganic carbon from the underlying sediments ( McKay et al., 2012). Putative genes for two different PPi-dependent 6-phosphofructokinases (00127_3135, 01092_1318) and an H(+)-translocating pyrophosphatase (00848_4300) were identified (Table S4). One of the phosphofructokinases and the pyrophosphatase are most closely related to those from several see more Beggiatoaceae and other Gammaproteobacteria (Fig. S2A, C), including M. capsulatus Bath, which as mentioned above has a PPi-dependent 6-phosphofructokinase in its CBB cycle. A second PPi-dependent 6-phosphofructokinase with more diverse affiliations is found in the BOGUAY genome only (Fig. S2B). It cannot of course be determined from sequences alone whether one or both are part of the CBB pathway; this enzyme also plays a role in glycolysis (see Section 3.4.1). The BOGUAY genome carries potential genes for both oxidative and reductive TCA

cycles (Table S5), which share a set of reversible reactions and differ at only a few steps. Experimental PLX3397 cell line evidence has been found for the operation of both oxidative and reductive TCA cycles in a single species, depending on growth conditions, for at least one bacterium (Chlorobaculum (Chlorobium) tepidum Tang and Blankenship, 2010) and one archaeon (Thermoproteus tenax Zaparty et al., 2008). Phylogenetic reconstructions based on predicted amino acid sequences suggest a complex evolutionary history for these pathways in the Beggiatoaceae, summarized in Fig. 5 and discussed below. Of the seven reversible steps shared by the two pathways (Fig. 5), four are predicted to be catalyzed by enzymes (AcnB, SucCD, FumAB) that are highly

conserved among the three relatively complete Beggiatoaceae genome sequences available, and one by an enzyme (malate dehydrogenase, Mdh) with close relatives in BOGUAY and B. alba only ( Fig. 6). Beta adrenergic receptor kinase The incomplete BgP genome sequence may or may not encode an Mdh. Most close relatives of these putative proteins are from Gamma- or Betaproteobacteria; only Mdh shows some evidence of more widespread gene exchange, with sequences from several Deinococci among the otherwise gammaproteobacterial neighbors. In contrast, the BOGUAY succinate dehydrogenase (SdhABC; Fig. S4A–C) is most closely related to sequences from the BgP and very incomplete BgS genomes, but is otherwise affiliated with Bacteroidetes sequences and, for SdhC especially, a few species from diverse other groups (e.g., spirochaetes and Ignavibacteria).

A suite of core-scale

permeability tests reveal permeabil

A suite of core-scale

permeability tests reveal permeabilities between 3 × 10−18 and 6 × 10−13 m2 for samples of lava and volcaniclastic deposits. Generally, coarser and less altered samples demonstrate higher permeabilities (>10−14 m2), while cores with finer and altered matrix material exhibit permeabilities below 10−15 m2. Andesitic lava samples also reveal low permeabilities, on the order of 10−16 m2. Analysis of a previous pumping test on a confined aquifer in Montserrat’s Belham valley reveal Angiogenesis inhibitor aquifer permeability of 10−10 m2. New insights and observations from Montserrat combined with a review of existing understanding of hydrologic on volcanic islands provides the basis for a discussion on potential conceptual hydrological models for Montserrat, specifically the Centre Hills springs. Current observations from Montserrat are consistent with two possible conceptual

hydrological models for volcanic island settings. Type 1 resembles the model applied to the Canary find more Islands; a low permeability core within the interior of the island elevates the water table allowing the development of aquifers and springs at high elevation. Type 2 is based on a conceptual model devised for Hawaii; springs are supplied by perched aquifers above low permeability, weathered aquitard. The hydrology of Montserrat is further complicated by the active volcanic system in the south. This link is not restricted to fumaroles on the flanks of the active SHV; high temperature, low elevation springs at Hot Water Pond suggest that volcanic influence on the hydrology extends to the east coast, some 6 km from the active vent. Elevated temperatures and SEC in the southern springs on CH point towards a contribution from warmer waters potentially supplied through

faults from a warmer aquifer at depth. The insights presented here provide useful constraints for numerical simulations to explore the fundamental hydrology of Montserrat, and distinguish which of these two conceptual models best represents Montserrat’s hydrological Venetoclax mouse system and the hydrology of volcanic arc islands in general. Improving our understanding of fundamental hydrology of such islands is essential for exploring hydrological and volcanic interactions as well as assessing the behaviour of a vital resource in response to a changing climate. None declared. The authors would like to thank MUL, Montserrat for providing access to their data archive and assistance in the field. In particular, this work was made possible by invaluable field support and guidance from Reuel Lee and Bill Tonge (formerly MUL). We are also grateful for assistance and contributions from a number of MVO staff and for assistance in the field from Alia Jasim (UOB). Thanks also to Jenni Barclay and Adrian Matthew for sharing rainfall data, and Steve Sparks for allowing access to CALIPSO cores. This work is funded by the NERC BUFI programme (studentship no.

Cells were incubated with PBS (control), Amblyomin-X (100 ng/ml)

Cells were incubated with PBS (control), Amblyomin-X (100 ng/ml) in the presence or absence of VEGF-A (10 ng/ml) for 2 h. Total RNA was extracted from the t-End cells using Trizol reagent™ as previously described by Chomczynski and Sacchi (1987). PECAM-1 mRNA was quantified by RT-PCR as previously described by Hebeda et al. (2008). The melting temperature used was 53.1 °C for 40 cycles. The primer sequences were: PECAM-1: 5′-tgcaggagtccttctccact-3′ (sense) and 5′-acgggttgattccactttgc-3′ (antisense) and UBC: 5′-agcccagtgttaccaccaag-3′ (sense) and 5′-acccaagaacaagcacaagg-3′ (antisense). The mean and standard error of the mean (s.e.m.) of all of the data presented herein were compared

using Student’s t-test or ANOVA. Tukey’s multiple comparisons test was used to determine the significance of the differences that were calculated between the values for the experimental conditions. GraphPad see more Prism 4.0 software (San Diego, CA, USA) was used for these statistical analyses. The differences were

considered significant when P < 0.05. Topical application of VEGF-A on the microcirculatory network in the mouse dorsal subcutaneous tissue enhanced the number of microvessels, and topical application of Amblyomin-X (10 or 100 ng/10 μl), every 48 h simultaneously with VEGF-A treatment, significantly reduced VEGF-A-induced angiogenesis (Fig. 1). It is noteworthy that similar results were obtained if Amblyomin-X treatment was started 24 h before VEGF-A application (data not shown). Additionally, local application of VEGF-A also increased the number of vessel CAMs, and application of Amblyomin-X reduced SPTLC1 the number of new vessels after VEGF-A treatment (Fig. 1C and D). Amblyomin-X treatment inhibited Rigosertib manufacturer VEGF-A induced cell proliferation at 48 and 72 h after treatments (Fig. 2A). It is important to emphasize that the concentration of Amblyomin-X employed did not cause toxicity to t-End cells, as Amblyomin-X treatment did not modify cell viability, quantified by necrosis and apoptosis, and displayed a protective effect against apoptosis evoked by serum deprivation (Table 1). VEGF-A treatment decreased the percentage of cells in G1/G0

phase and increased the percentage of cells in S phase, 48 and 72 h after the treatment relative to cells treated with PBS (Fig. 2B). Treatment with Amblyomin-X reversed the VEGF-A effect and significantly delayed the cell cycle, as Amblyomin-X treatment enhanced and reduced the percentage of cells in G0/G1 and S phase, respectively (Fig. 2B). Matrigel matrix was employed to quantify the effect of Amblyomin-X on migratory and adhesion properties. Amblyomin-X treatment did not affect VEGF-A induced cell migration (Fig. 3A), but reduced cell adhesion (Fig. 3B) and tube formation (Fig. 3C and D). VEGF-A treatment increased membrane expression of PECAM-1, which was reversed by Amblyomin-X treatment (Fig. 4A). The effect evoked by VEGF-A was dependent on gene synthesis visualized by enhanced PECAM-1 mRNA levels (Fig. 4B and C).

It is possible that they are subserved by different amygdala subs

It is possible that they are subserved by different amygdala substructures (some of which might still be functional in these patients), or that one function can be compensated for by other brain circuits while the other function cannot. The latter possibility would account for the apparent differences between neuroimaging and lesion studies. A previous literature has addressed the amygdala’s role in social judgement and explicit, verbal emotion recognition. Lesion studies have shown an impairment in explicit recognition of both angry and fearful faces (Adolphs et al., 1994 and Becker et al., 2012) but not in detection of emotions in prosody (Adolphs and Tranel, 1999 and Bach et al., 2013), and this could mean that explicit

evaluation of facial expression is another function of the amygdala, possibly independent from a function in prioritising threat information. In line with a previous study (Horstmann Dasatinib mw & Bauland, 2006), we used only one face identity to reduce variance in dependent measures. To exclude a potential impact of low-level visual features peculiar to this face identity, further work with other face identities is desirable. Also, the fact that we investigated only two individuals with rare selective amygdala lesions renders any generalisation speculative, buy Lumacaftor and similar findings in more individuals are needed to support our conclusions. In summary, we demonstrate reversal of the anger superiority during visual search in two individuals with amygdala lesion, providing evidence that the human amygdala acetylcholine is involved in rapid detection of threat in faces. This reconciles human and animal lesion literature and confirms the role of this structure for implicit threat processing. The authors state no conflicts of interest. We thank Martin Schmidt-Daffy for providing the stimuli used in this work and Christoph Korn for helpful comments on an initial draft of this manuscript. This work was supported by the Wellcome Trust [Ray Dolan, Senior Investigator Award 098362/Z/12/Z]. The Wellcome Trust Centre

for Neuroimaging is supported by core funding from the Wellcome Trust 091593/Z/10/Z. “
“Gaucher disease (GD) is a rare lysosomal storage disorder with an estimated prevalence of approximately 1 in 111,000 to 1 in 57,000 [1] and [2], with higher prevalence noted within the Ashkenazi Jewish population of 1 in 855 [1]. This disease results from mutations in the gene for beta-glucocerebrosidase; insufficient activity of this enzyme leads to accumulation of glucocerebroside in macrophages, which leads to multi-organ pathology [1]. Three main types of GD are recognized, and Type 1 is the most common with the key clinical manifestations of splenomegaly, hepatomegaly, anemia, and thrombocytopenia and a lack of primary central nervous system involvement that is characteristic of Types 2 and 3 [1]. Gaucher disease has marked heterogeneity in age of onset, disease manifestations, and clinical course [1], [3], [4] and [5].

The alternative co-culture variant of this method described provi

The alternative co-culture variant of this method described provides considerable flexibility for experimental design, depending on the application. The ultimate goal for most BBB researchers is to be able to study the human BBB. However, the difficulties associated with developing robust and realistic in vitro human BBB models have led to the use of animal models ( Patabendige, 2012). A porcine BBB model is a good alternative as the biology of the pig is closer than that of other laboratory animals to the biology of the human ( Everolimus research buy Walters et al., 2011). The PBEC model presented in this paper is one of the best BBB models giving high TEER. However, as with all BBB models, there

are some limitations. Strict adherence to the experimental procedure is required to produce high yields of pure PBEC cultures and to minimise variation between batches. Only limited in vivo data is available for porcine models compared to rodent models; however, with the increased use of transgenic and miniature pigs this will improve in future. Availability of good porcine primers and

antibodies is Venetoclax manufacturer currently an issue, but this also will improve with the recent publication of a high-quality draft pig genome sequence ( Groenen et al., 2012). Further examination of expression and function of transporters and receptors on the PBEC model is currently under way. In summary, this method combines simplicity and reproducibility with optimum cell yield and purity, making the resulting PBEC model robust, reliable 3-mercaptopyruvate sulfurtransferase and flexible, with good preservation of BBB features, suitable for a range of appli-cations. 8 h isolation of brain capillaries and freezing (from 6 pig brains) Culture medium L-15

Leibovitz (L-15); medium 199 (M199); DMEM; Penicillin (10,000 U/mL)/Streptomycin (10 mg/mL) (P/S); Glutamine (2 mM stock soln); Heparin; Puromycin; cell permeant cAMP analogue, CPT-cAMP; Hydrocortisone; Trypsin-EDTA for endothelial cells; Hanks’ balanced salt solution (HBSS) without (w/o) Ca2+,Mg2+; FCS; poly-D-lysine; human fibronectin; dimethyl sulfoxide (DMSO); all from Sigma. Type IV phosphodiesterase inhibitor, RO 20-1724 from Calbiochem/Merck. Enzymes from Lorne Laboratories Limited, UK. Collagenase, Trypsin, DNase I. Minimal essential medium (MEM+HEPES) from MP Biomedicals. Phosphate buffered saline (PBS) with Ca2+ and Mg2+ from Cambrex Bio Science. BPDS from First Link UK. Nylon meshes (60 µm and 150 µm pore size) from Plastok Associates, UK. Rat tail collagen type I from Becton Dickinson. Tissue culture plastics (flasks, plates, Petri dishes). Filter inserts: Costar ‘Transwell Clear’ 12-well tissue-culture-treated sterile polyester membrane, 0.4 µm pore, 12 mm membrane, pre-loaded on cluster plates. [14C]sucrose (0.15 µCi/mL final concentration, specific activity 643 mCi/mmol) and [14C]mannitol (0.

, 1993, Bourtzis, 2008, Girin and Bouletreau,

, 1993, Bourtzis, 2008, Girin and Bouletreau, PLX4032 supplier 1995 and Stouthamer, 1993). Reproductive alterations induced by Wolbachia in their hosts include cytoplasmic incompatibility, parthenogenesis induction, and feminization of genetic males ( Werren, 1997). In social insects, however, the influence of Wolbachia in reproduction still remains unknown ( Chapuisat and Keller, 1999 and Keller et al., 2001, but see Wenseleers et al., 1998). Some aspects of Wolbachia are well known. It was clear by Werren et al. (1995) that in arthropods there were two mains groups (A and B). Zhou et al. (1998) went further indicating

that those two clades had at least eight potential groups within A and four within B. Recently, A and B were termed “supergroups” ( Lo

et al., 2007) and other supergroups have also been described, including on Wolbachia infecting nematoids (C and D supergroups) ( Bandi et al., 1998), supergroup E in Collembola ( Czarnetzki and Tebbe, 2004 and Vandekerckhove et al., 1999), F in arthropods and nematoids ( mTOR phosphorylation Casiraghi et al., 2005), G in spiders ( Rowley et al., 2004) and H in termites ( Bordenstein and Rosengaus, 2005). Wolbachia transmission within host species occurs maternally through the egg cytoplasm ( Stouthamer et al., 1999 and Werren, 1997). However, several independent studies have shown that Wolbachia can be transmitted horizontally, within as well as between host species ( Ahrens and Shoemaker, 2005, Dedeine et al., 2005, O’Neill et al., 1992 and Vavre et al., 1999). Studies conducted in ant populations of several species of the genus Solenopsis in areas where they were introduced and native ranges indicated the presence of the two Wolbachia supergroups (A and B), and reported MycoClean Mycoplasma Removal Kit that the frequency of infection varies dramatically between different regions ( Shoemaker et al., 2000). In addition, there is a strong association between the Wolbachia variant

and the host mitochondrial DNA, as also reported by Shoemaker et al., 2003a and Shoemaker et al., 2003b. Ahrens and Shoemaker (2005) suggested that the evolutionary history of Wolbachia in S. invicta is more complex and involve multiple invasions or horizontal transmission events of the bacteria into this species. These authors also suggest that Wolbachia infections might have been lost secondarily within different lineages and that the effects of Wolbachia on the mitochondrial genome of the host are less severe than originally predicted. While some parasites are successful inside their hosts, others benefit from the ant nest as a super-organism and are successful as social parasites. Originally described as Labauchena daguerrei, Solenopsis daguerrei is a workerless parasitic ant. Its hosts are restricted to Solenopsis species of the group saevissima (S. richteri, S. invicta, S. saevissima, S. quinquecuspis, and S. macdonaghi) ( Tschinkel, 2006).

e , around the shoulder), and risk of radiation injury to nerves

e., around the shoulder), and risk of radiation injury to nerves that are in direct contact with the BT catheters.

A group of practitioners with expertise and experience in sarcoma BT were appointed by the American Brachytherapy Society (ABS) Board of Directors to provide a consensus statement for the use of BT in STS. The previously published ABS guidelines were updated with a literature search, and the experts view on the state of the art was formulated. The evidence supporting BT as a component of the multidisciplinary management of sarcoma is described. Recommendations are made on radiation techniques and doses, and the expected tumor Selleck ZD6474 control and complication rates are provided. This consensus statement was submitted to the ABS Board of Directors for approval before publication. Ideally, patients should be evaluated by a multidisciplinary sarcoma team, which Saracatinib clinical trial includes surgical, radiation and medical oncologists, radiologists, and pathologists with knowledge and experience in the management of sarcomas. Preoperative staging evaluations include careful examination of the affected body site for extent of disease and the functional status of the affected body structure followed by imaging of the tumor with MRI for pelvic, extremity, and truncal lesions and CT for abdominal and retroperitoneal lesions to determine FER the

radiologic extent of disease. Preoperative imaging delineates the gross disease and associated tissue edema, and it may reveal invasion into surrounding structures.

Identification of the relationship of the lesion to adjacent critical structures, such as bone, nerves, and blood vessels, can be used to plan the extent and nature of the surgery. It is equally important to consider whether skin, soft tissue, bone, or vascular grafting will be required to repair the surgical defect. Chest CT should be obtained to rule out lung metastasis, which is the most common site of distant spread; patients with low-grade T1 lesions can be adequately staged with a chest X-ray. CT of the abdomen and pelvis may be valuable for patients with extremity or truncal liposarcoma, epithelioid sarcoma, angiosarcoma, or leiomyosarcoma, which have a higher rate of extrapulmonary spread (11). PET/CT may be useful for histologies with a predilection for nodal metastases, including clear cell sarcoma, angiosarcoma, rhabdomyosarcoma, epithelioid sarcoma, and synovial sarcoma. MRI of the spine for patients with myxoid liposarcoma can also be considered (12). Detection of lung metastasis should prompt consideration of chemotherapy and possibly surgical resection depending on the number, location, size, and rapidity of progression [13], [14] and [15]. Metastectomy for non-pulmonary metastasis has also been reported [16], [17] and [18].

2008) because of their low cost (Drewnowski & Specter 2004), high

2008) because of their low cost (Drewnowski & Specter 2004), high energy content (Kant

2000), poor satiety (Rolls 2000), endocrine disruption properties (Prentice & Jebb 2003) and hyper promotion (Wilson et al. 2006). Consumers appear to be aware of some of these issues, reduced fat products in particular being in high demand (e.g. Sandrou and Arvanitoyannis 2000). However, there Selleck Autophagy inhibitor is mixed evidence about their awareness of the fat, sugar, salt and energy in heavily marketed EDNP products (Wynder 2010). For example, Brewer and Prestat (2002) found consumers were little or only moderately concerned about the fat, cholesterol, energy and sugar content of food. Similarly, Moon (1998) showed that fewer than half of consumers were concerned about fat and sugar. It is likely that the levels of concern that consumers hold about fat,

sugar, salt and energy may be an important motivating factor which may mediate their consumption of EDNP (Weston 2013) and alternative, modified products which contain lower amounts of these constituents. PLX3397 However, the little work that has been done in this area has been about EDNP products. There has been almost no work on preferences for products which are low in fat, sugar, salt (hereafter referred to as LFSS products) or the factors which may drive their purchasing intentions (Solheim & Lawless 1996). In this paper, we propose a conceptual SPTLC1 model (Fig. 1) broadly based on the Food Related Lifestyle Model (FRLM) (Brunso & Grunert 1995), the Theory of Planned Behavior (TPB) (Ajzen 1991) and previous research into food risk perceptions (Hohl and Gaskell 2008, Herrmann et al 2000, Worsley and Scott 2000). Our main outcome variable is intention to purchase low fat, sugar and salt (LFSS)

food products. Potentially, this variable may be influenced by different types of food concerns, especially concerns about food and nutrition (similar to, but more comprehensive than attitude indices in the TPB), and by perceived control over personal health and food buying (similar to self-efficacy in the TPB) and also perceived influence over external food issues (such as animal welfare). In turn, these likely depend on psycho-social characteristics such as personal values (as proposed in the FRLM) and on social demographic factors. We proposed four broad hypotheses, as follows. First, we expected that consumers who had higher concern about the nutrition and health aspects of food would be more likely to intend to purchase LFSS food products than those with lower nutrition concern. Our reasoning followed the TPB model, that positive attitudes towards an intended behavior should be positively linked to that intention.