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At least 289 records · Page 16Linked to original sources
PubMed2001

Synthesis and characterization of 2D and 3D structures from organic derivatives of polyoxometalate clusters: role of organic moiety, counterion, and solvent.

New organic derivatives of "inverse-Keggin" polyoxometalate (POM) clusters, [Mo(12)O(46)(AsR)(4)](4-) (R = C(6)H(4)-4-COOH, C(6)H(3)-4-OH-3-NO(2), C(6)H(4)-4-OH), have been synthesized. Structures of the corresponding sodium or iron salts were elucidated by single-crystal X-ray diffraction and shown to be 3D structures connected through hydrogen bonds and/or O-Na-O linkages. Parameters which influence the final solid-state architecture, such as the crystallizing solvent, organic moiety, and counterions, have been examined. The hydrogen-bonding ability of the solvent affects the connectivity of the POM clusters through interactions with the organic group and the inorganic core. The organic groups influence the structure through hydrogen bonds to other organic groups, to neighboring clusters, and/or to solvent molecules. Hydrogen bonding between the organic groups and the solvent appears to inhibit some possible connectivity patterns, such as the hydrogen-bonded dimerization of carboxylic acid groups. Na(+) ions were found directly bonded to the cluster oxo ligands and provided linkages between clusters. Larger cations, such as transition metals, did not show this interaction, and other bonding methods dominated.

Journal Article↗
PubMed1997

Organic anion transporting polypeptide mediates organic anion/HCO3- exchange.

Organic anion transporting polypeptide (oatp) is an integral membrane protein cloned from rat liver that mediates Na+-independent transport of organic anions such as sulfobromophthalein and taurocholic acid. Previous studies in rat hepatocytes suggested that organic anion uptake is associated with base exchange. To better characterize the mechanism of oatp-mediated organic anion uptake, we examined transport of taurocholate in a HeLa cell line stably transfected with oatp under the regulation of a zinc-inducible promoter (Shi, X., Bai, S., Ford, A. C., Burk, R. D., Jacquemin, E., Hagenbuch, B., Meier, P. J., and Wolkoff, A. W. (1995) J. Biol. Chem. 270, 25591-25595). Whereas noninduced transfected cells showed virtually no uptake of [3H]taurocholate, taurocholate uptake by induced cells was Na+-independent and saturable (Km = 19.4 +/- 3.3 microM; Vmax = 62.2 +/- 1.4 pmol/min/mg protein; n = 3). To test whether organic anion transport is coupled to HCO3- extrusion, we compared the rates of taurocholate-dependent HCO3- efflux from alkali-loaded noninduced and induced cells. Monolayers grown on glass coverslips were loaded with the pH-sensitive dye 2', 7'-bis(carboxyethyl)-5(6)-carboxyfluorescein; intracellular pH (pHi) was measured by excitation ratio fluorometry. Noninduced and induced cells were alkalinized to an equivalent pHi ( approximately 7.7) by transient exposure to a 50 mM HCO3-, Cl--free solution. In the absence of extracellular Cl- and taurocholate, isohydric reduction of superfusate HCO3- concentration from 50 to 25 mM resulted in an insignificant change in pHi over time (dpHi/dt) in both groups. Addition of 25 microM taurocholate to the superfusate led to a rapid fall in pHi in induced (-0.037 +/- 0.011 pH units/min to pHi of 7.41 +/- 0.14) but not in noninduced (0.003 +/- 0.006 pH units/min to pHi of 7.61 +/- 0.08) cells (p < 0.03). These data indicate that oatp-mediated taurocholate transport is Na+-independent, saturable, and accompanied by HCO3- exchange. We conclude that organic anion/base exchange is an important, potentially regulatable component of oatp function.

Anion Transport Proteins↗
PubMed1999

Induction of organ dysfunction and up-regulation of inflammatory markers in the liver and kidneys of hypotensive brain dead rats: a model to study marginal organ donors.

BACKGROUND: Marginal donors exposed to the full array of effects induced by brain death are characterized by low success rates after transplantation. This study examined whether organs from marginal brain dead animals show any change in organ function or tissue activation making them eventually more susceptible for additional damage during preservation and transplantation. METHODS: To study this hypothesis we first focused on effects of brain death on donor organ quality by using a brain death model in the rat. After induction of brain death, Wistar rats were ventilated for 1 and 6 hr and then killed. Sham-operated rats served as controls. Organ function was studied using standard serum parameters. Tissue activation of liver and kidney was assessed by staining of immediate early gene products (IEG: FOS, JUN), and inflammatory markers; cell adhesion molecules (Intercellular adhesion molecule-1, vascular cell adhesion molecule-1), leukocyte infiltrates (CD45, T cell receptor, CD8, CD4), and MHC class II. RESULTS: During brain death progressive organ dysfunction was observed that coincided with a significant increase in activation of immediate early genes, intercellular adhesion molecule-1, vascular cell adhesion molecule-1, CD45, and MHC class II versus nonbrain dead controls. In liver tissue also the markers for T cell receptor and CD8 significantly increased. CONCLUSIONS: These findings suggest that an immune activation with increased endothelial cell activation and immediate early gene expression occurs in marginal donors after brain death induction. We suggest that brain death should not longer be regarded as a given nondeleterious condition but as a dynamic process with potential detrimental effects on donor organs that could predispose grafts for increased alloreactivity after transplantation.

Animals↗
PubMed2006

AINTEGUMENTA contributes to organ polarity and regulates growth of lateral organs in combination with YABBY genes.

Lateral organs in flowering plants display polarity along their adaxial-abaxial axis with distinct cell types forming at different positions along this axis. Members of three classes of transcription factors in Arabidopsis (Arabidopsis thaliana; the Class III homeodomain/leucine zipper [HD-ZIP] proteins, KANADI proteins, and YABBY proteins) are expressed in either the adaxial or abaxial domain of organ primordia where they confer these respective identities. Little is known about the factors that act upstream of these polarity-determining genes to regulate their expression. We have investigated the relationship between AINTEGUMENTA (ANT), a gene that promotes initiation and growth of lateral organ primordia, and polarity genes. Although ant single mutants do not display any obvious defects in organ polarity, loss of ANT activity in combination with mutations in one or more YABBY genes results in polarity defects greater than those observed in the yabby mutants alone. Our results suggest that ANT acts in combination with the YABBY gene FILAMENTOUS FLOWER (FIL) to promote organ polarity by up-regulating the expression of the adaxial-specifying HD-ZIP gene PHABULOSA. Furthermore, we show that ANT acts with FIL to up-regulate expression of the floral homeotic gene APETALA3. Our work defines new roles for ANT in the development of lateral organs.

Arabidopsis↗
PubMed2004

A mouse model to study organ homing behaviour of haemopoietic progenitor cells reveals high selectivity but low efficiency of multipotent progenitors to home into haemopoietic organs.

To study the homing behaviour of an enriched multipotent primitive haemopoietic progenitor cell (HPC) population in mice, undifferentiated murine factor-dependent multipotent HPCs (FDCP-mix), stably transfected with the green fluorescence protein gene, were intravenously injected into congenic mice. After 2 or 24 h, cell suspensions were prepared from bone marrow, spleen, lung, liver, muscle, colon, kidney, brain or blood of the mice and analysed by flow cytometry. Using direct quantifiable determination of total HPC numbers homed per organ and a method to estimate the degree of organ contamination by HPC that were present in blood vessels within the organs before preparation, the highest absolute numbers of HPC were detected in the liver and lungs at 2 h but this was sharply decreased at 24 h, whereas HPC selectively accumulated in the bone marrow and spleen at 24 h after transplantation. Only a few HPC were detected in other organs. The seeding efficiency of homed FDCP-mix HPC to the bone marrow and spleen was approximately 1.5% and ranged between that of primary whole bone marrow cells and lineage-depleted freshly isolated bone marrow cells. Pretreatment of HPC with inhibitors of signal transduction indicated that short-term homing of multipotent HPC into haemopoietic organs is an active process requiring co-ordinated intracellular signalling through Rho family small GTPases and protein kinases. Thus, short-term homing of FDCP-mix HPC into haemopoietic organs is of low efficiency but high selectivity, and provides a system to analyse the mechanisms and manipulation of primitive HPC which saves large numbers of donor animals.

Animals↗
PubMed1995

Quantitative and qualitative distribution of mercury in organs from arctic sledgedogs: an atomic absorption spectrophotometric and histochemical study of tissue samples from natural long-termed high dietary organic mercury-exposed dogs from Thule, Greenland.

Organs from 10 sledgedogs fed methyl mercury-containing organs and meat from predatory marine animals also eaten by humans in the Thule district of Greenland, were examined histochemically for cellular distribution of mercury, and the organ concentrations of mercury were quantified by atomic absorption spectrometry (total Hg). In selected organs the methyl mercuric level was determined by gaschromatography. The highest concentration of total mercury was found in mesenterial lymph nodes followed by liver and kidneys, which indicates that the lymphatic system might play an important role in the regulating transport of mercury to target organs. The concentrations were age-related, and the results suggest that demethylation takes place in all organs except skeletal muscles, but lowest in CNS. The distribution of mercury at cellular and subcellular levels was studied by the autometallographic technique. The atomic absorption spectrometric and autometallographic results were in good agreement. The brain mean concentration in the oldest group was 438 micrograms/kg, a level much lower than what has been reported to cause effects in the human central nervous system. However, if humans over a period of e.g. 50 years eat Arctic marine meat and accumulate mercury in the same way as dogs, the possibility that this may have health implications cannot be entirely excluded.

Aging↗
PubMed1995

Organic solvent-tolerant bacterium which secretes an organic solvent-stable proteolytic enzyme.

A bacterial strain which can be grown in a medium containing organic solvents and can secrete a proteolytic enzyme was isolated and identified as Pseudomonas aeruginosa. The strain was derived by the following two-step procedures: high proteolytic enzyme producers were first isolated by the usual method, and then the organic solvent-tolerant microorganism was selected from these high-rate proteolytic enzyme producers. The proteolytic activity of the supernatant of the culture was stable in the presence of various organic solvents. The stability of the enzyme in the presence of organic solvents, of which the values of the logarithm of the partition coefficient (log P) were equal to or more than 3.2, was almost the same as that in the absence of organic solvents. It is expected that both the solvent-tolerant microorganism and the solvent-stable enzyme produced by this strain can be used as catalysts for reactions in the presence of organic solvents.

Journal Article↗
PubMed2005

Sensory control and organization of neural networks mediating coordination of multisegmental organs for locomotion.

It is well established that locomotor patterns result from the interaction between central pattern generating networks in the nervous system, local feedback from sensory neurons about movements and forces generated in the locomotor organs, and coordinating signals from neighboring segments or appendages. This review addresses the issue of how the movements of multi-segmented locomotor organs are coordinated and provides an overview of recent advances in understanding sensory control and the internal organization of central pattern generating networks that operate multi-segmented locomotor organs, such as a walking leg. Findings from the stick insect and the cat are compared and discussed in relation to new findings on the lamprey swimming network. These findings support the notion that common schemes of sensory feedback are used for generating walking and that central neural networks controlling multi-segmented locomotor organs generally encompass multiple central pattern generating networks that correspond with the segmental structure of the locomotor organ.

Animals↗
PubMed1987

Organization of lumbar spinal outflow to distal colon and pelvic organs.

The lumbar sympathetic outflow projects through the lumbar splanchnic, lumbar colonic, and hypogastric nerves (and to a lesser degree through the sacral sympathetic chain and pelvic nerves). It is thought to be involved in the regulation of the storage and evacuation functions of the following three organ systems: lower urinary tract, hindgut, and reproductive organs. In addition, it controls vascular resistance and capacitance. Thus the target tissues of the postganglionic neurons are vascular smooth muscle, visceral smooth muscles, probably secretory epithelia, and also neurons in the enteric nervous system and the pelvic ganglia. The preganglionic neurons are situated in the caudal part of the spinal representation, neurons associated with the colon being located rostral to those associated with the pelvic organs. Most lie medial to the classical intermediolateral cell column that may contain mainly vasoconstrictor neurons. Most (if not all) preganglionic neurons are cholinergic; some also contain an identified peptide. Most of the postganglionic neurons are situated in the inferior mesenteric ganglion (or equivalent structures); again, those projecting to the colon lie rostral to those projecting to the pelvic organs. Others lie in intercalated prevertebral ganglia, in the pelvic plexus, and in sacral paravertebral ganglia. The majority is noradrenergic, and most also contain one or several peptides, the topographical distribution of which appears to characterize functional subgroups of neurons. The terminations of noradrenergic axons in many pelvic organs probably make close contact with both vascular and nonvascular effectors. In the colon, most endings are located in the enteric plexuses. The responses of these organs to electrical stimulation of visceral nerves, and their reflex responses (together with those observed in the efferent axons of visceral nerve trunks) to electrical and natural stimulation of afferent fibers, lead to the general conclusion that several distinct classes of pre- and postganglionic neurons exist. 1) Vasoconstrictor neurons demonstrate ongoing activity with cardiac rhythm and appropriate reflexes to stimulation of cardiovascular afferent receptors and respond only weakly to natural stimulation of visceral receptors. 2) MR neurons respond to visceral stimuli but are not influenced from arterial baro- and chemoreceptors. These show at least two different response patterns consistent with their separate involvement in the reciprocal behavior of the colon and bladder. 3) Other neurons are silent in anesthetized animals and do not respond to any stimuli used thus far.(ABSTRACT TRUNCATED AT 400 WORDS)

Afferent Pathways↗
PubMed1996

Sympathetic discharge to mesenteric organs and the liver. Evidence for substantial mesenteric organ norepinephrine spillover.

This study using sampling of blood from the portal vein, in addition to arterial and hepatic sites, to estimate separately spillovers of norepinephrine from mesenteric organs and the liver in seven patients undergoing upper abdominal surgery. Conventional measurements in arterial and hepatic venous plasma provided a measure of net hepatomesenteric NE spillover (403 pmol/ml) that indicated a 13% contribution of these organs to total body spillover of NE into systemic plasma (3,071+/-518 pmol/min). The net hepatomesenteric spillover of NE into systemic plasma was much lower than the spillover of NE from mesenteric organs into portal venous plasma (1,684+/-418 pmol/min). This and the hepatic spillover of NE into systemic plasma (212+/-72 pmol/min) indicated a considerable combined spillover of NE from hepatomesenteric organs (1,896+/-455 pmol/min). The sum of the latter estimate with the difference between total body and net hepatomesenteric NE spillovers provided an adjusted total body spillover of NE into both systemic and portal venous plasma (4,564+/-902 pmol/min). Mesenteric organs made a 37% contribution, and the liver made a 5% contribution to the adjusted total body spillover of NE. Thus, a substantial proportion of total body sympathetic outflow is directed towards mesenteric organs; this is obscured by efficient hepatic extraction of NE (86+/-6%) when measurements are restricted to arterial and hepatic venous plasma.

Aged↗
PubMed2005

Microbial succession associated with organic matter decomposition during thermophilic composting of organic waste.

Using dog food as a model of the organic waste, thermophilic composting was carried out for 14 days at a fixed temperature of 60 degrees C. The relationship between organic matter decomposition measured by CO2 evolution during the bio-stabilization process and microbial succession expressed as the changes over time in the restriction fragment length polymorphism (RFLP) patterns of 16S rDNA sequences, of micro-organisms associated with the composting material was also examined. The CO2 evolution rate peaked on day 3 and gradually decreased until it became extremely small after day 9 of composting, indicating that vigorous organic matter decomposition ceased around this time. On the other hand, the RFLP pattern changed drastically from day 0 to day 4 or 5, then remained stable until day 7 or 8, reaching its final configuration, with little variations, after day 9 of composting. RFLP analysis therefore indicates that microbial succession continued into the later stage of composting. Nevertheless, by day 9, the rate of organic matter decomposition was so low that its influence on microbial populations could be hardly recognized by conventional methods of dilution plating. Moreover, the compost produced by day 9 showed no inhibitory effect on the growth of Komatsuna (Brassica campestris L. var. rapiferafroug), indicating that the maturity of compost is sufficient for plant growth when the rate of organic matter decomposition has become extremely low and the RFLP patterns become stable.

Bacteria↗
PubMed1991

Biogeochemical processes governing exposure and uptake of organic pollutant compounds in aquatic organisms.

This paper reviews current knowledge of biogeochemical cycles of pollutant organic chemicals in aquatic ecosystems with a focus on coastal ecosystems. There is a bias toward discussing chemical and geochemical aspects of biogeochemical cycles and an emphasis on hydrophobic organic compounds such as polynuclear aromatic hydrocarbons, polychlorinated biphenyls, and chlorinated organic compounds used as pesticides. The complexity of mixtures of pollutant organic compounds, their various modes of entering ecosystems, and their physical chemical forms are discussed. Important factors that influence bioavailability and disposition (e.g., organism-water partitioning, uptake via food, food web transfer) are reviewed. These factors include solubilities of chemicals; partitioning of chemicals between solid surfaces, colloids, and soluble phases; variables rates of sorption, desorption; and physiological status of organism. It appears that more emphasis on considering food as a source of uptake and bioaccumulation is important in benthic and epibenthic ecosystems when sediment-associated pollutants are a significant source of input to an aquatic ecosystem. Progress with mathematical models for exposure and uptake of contaminant chemicals is discussed briefly.

Animals↗
PubMed1990

Histochemical demonstration of NADPH-diaphorase activity in the pineal organ of the frog (Rana esculenta), but not in the pineal organ of the rat.

Using the histochemical method for the demonstration of NADPH-diaphorase activity, the pineal organ of the frog and rat was investigated in serial sections. A positive NADPH-diaphorase activity was demonstrated in pinealocytes and nerve cells in the pineal organ of the frog, but not in the rat. An intense activity existed in the apical portion of the photosensitive pinealocytes of the frog. Large NADPH-diaphorase positive nerve cells (15-20 microns in diameter) were located within the parenchyma of the pineal organ in the frog. Large NADPH-positive nerve cells were more numerous in the rostral than in the caudal portion of the organ, but the intensely stained cells, counting 25-35 in number, showed almost equal distribution and number in the ventral and the dorsal aspect of the pineal organ. In their staining ability, NADPH-diaphorase positive pineal nerve cells resembled retinal amacrine cells. The results in the pineal organ of the frog are discussed in light of previous morphological findings using the acetylcholinesterase reaction, and with electrophysiological results.

Animals↗
PubMed2002

Organ heterogeneity of host-derived matrix metalloproteinase expression and its involvement in multiple-organ metastasis by lung cancer cell lines.

Cancer metastasis is tightly regulated by the interaction of tumor cells and host organ microenvironments. Matrix metalloproteinases (MMPs), produced by both tumor cells and host stromal cells, play a central role in tumor invasion and angiogenesis. We determined whether metastatic potential of lung cancer to multiple organs is dependent solely on the expression of MMPs by tumor cells, using two metastasis models of human lung cancer cell lines expressing various levels of MMPs and a MMP inhibitor (ONO-4817). In the lung metastasis model, tumor cells (PC14, PC14PE6, H226, A549) inoculated i.v. into nude or SCID mice metastasized only in the lung. In the multiple-organ metastasis model, tumor cells (RERF-LC-AI, SBC-3/DOX, H69/VP, which express low levels of MMPs) inoculated i.v. into natural killer cell-depleted SCID mice metastasized into the liver, kidneys, and systemic lymph nodes. Film in situ zymography analysis revealed that the nontumor parenchyma of the lung had no gelatinolytic activity, whereas gelatinolytic activity of the liver and kidney was high and low, respectively. In the lung metastasis model, gelatinolytic activity of lung nodules directly correlated with the in vitro expression of MMP-2 and MMP-9 by tumor cells. Inhibition of MMP activity by ONO-4817 suppressed lung metastasis by the cell lines that expressed MMPs, but not those that did not express MMP, via the inhibition of MMP activity of lung tumors. In the multiple-organ metastasis model, liver parenchyma, but not liver nodules, showed gelatinolytic activity. The MMP inhibition reduced metastasis to the liver, but not to the kidney or lymph nodes, via inhibition of MMP activity of liver parenchyma. These findings suggest that MMP expression varies among the host organ microenvironments and that stromal MMPs may promote metastasis of lung cancer. Therefore, antimetastatic effects based on MMP inhibition may be dependent on MMPs derived not only from tumor cells but also from organ-specific microenvironments.

Adenocarcinoma↗
PubMed2004

[Removal efficiency of red tide organisms by modified clay and its impacts on cultured organisms].

Removal efficiencies of Prorocentrum donghaiense (Prorocentrum dentatum) by Hexadecyltrimethylammonium (HDTMA) bromide and organo-clay modified by HDTMA were identified. Moreover the toxicity of the unbound HDTMA and HDTMA plus clay to aquacultural organisms, Penaeus japonicus, was also tested. The results suggested that (1) The unbound HDTMA had an excellent ability to remove the red tide organisms. However, its strong toxicity to Penaeus japonicus would restrict its practical use in red tide control. (2) The toxicity of HDTMA could be remarkably decreased by addition of clay and the organo-clay complex had a good ability to removal red tide organisms. At the same time the availability of organo-clay to remove the red tide of P. donghaiense and Heterosigma akashiwo in the lab-imitated cultures were studied. The results indicated that the organo-clay complex could remove 100% P. donghaiense at the dosage of 0.03 g/L and effectively control H. akashiwo at 0.09 g/L while the survival rate of Penaeus japonicus larvae, which were cultured in the red tide seawater, is kept 100%. According to the results in laboratory, the mesocosm tests (CEPEX) in East China Sea were conducted in April and May of 2003. The removal efficiencies of original clay, organic clay and inorganic clay were compared during the CEPEX tests. The results revealed that both inorganic clay and organic clay could remove red tide organisms more effectively than the original clay.

Aluminum Silicates↗
PubMed1991

[The 3-dimensional organization of the nucleoli of benign and malignant tumor cells from different human organs].

The method of ultrathin serial sections was used to perform a comparative ultrastructural and 3-dimensional analysis of nucleoli for the following variants of human tumours: benign (fibroadenoma) and malignant (infiltrating ductal carcinoma) tumours of one organ (mammary gland); malignant tumours of epidermal genesis in different organs (squamous cell carcinomas of skin, larynx, lung, gullet, uterus); two forms of malignant tumours (squamous cell and small cell carcinomas) of one organ (lung). The spatial models of nucleoli in these tumour cells are given. The specific signs in architecture of tumour nucleoli was found. Nucleoli of fibroadenomas have well pronounced 1-4 fibrillar centres forming a united system with a lacunar component and intranucleolar chromatin. Unlike benign tumour cells, nucleoli of infiltrating ductal carcinomas are characterized by large, prominent nucleoli containing giant, multiform fibrillar centres with a complicated surface, a well developed granular component and an unusually organized lacunar system. In squamous cell carcinomas of various localization, active, hypertrophied nucleoli with pseudonucleolonemal organization were found. The small cell carcinoma of lung differs from the squamous cell cancer of the same organ by dense, fibrillar nucleoli with a small amount of granular component located on the periphery of the nucleolar body. Nucleolar type reflecting the functional state of malignization process may serve as an additional diagnostic criterion for tumour identification.

Adenofibroma↗
PubMed2006

[The emission of organic-inorganic single quantum well with organic heterojunction].

Organic-inorganic single quantum well with organic heterojunction ITO\SiO2 (60 nm)\MEH-PPV(40 nm)\Alq3 (40 nm)\SiO2 (60 nm)\Al has been fabricated. With the detailed investigation of photoluminescence and electroluminescence of this novel device, the authors found that the permittivity confinement effect and the quantum size effect have obviously an effect on the optical and electrical properties of organic-inorganic quantum well with organic heterojunction. The electroluminescence of organic-inorganic quantum well with organic heterojunction included three different emissions under alternative-current voltages: 410, 510 and 590 nm, which originated from radiative recombination of MEH-PPV, recombination of Alq3 excitons and MEH-PPV excitons respectively.

English Abstract↗
PubMed1990

[Organic versus non-organic diseases. A distinction necessary for rational practice].

A great many, perhaps the majority, of those who see a doctor present subjective suffering and behaviour disorders that are problematic to classify as illness. This is because no pathobiological foundation for such classification is demonstrated--no matter how thoroughly the patients are examined, or how long they are followed up. Symptomatologically too, organic and non-organic conditions are distinctive. While organic illnesses are characterized by physical and biochemical signs, non-organic disorders manifest only distressing experiences (as pains or anxiety) or undesirable behaviour (as abuse of alcohol)--phenomena that are inseparable from normal sensation, emotion, intentions and actions. As for treatment, the main methods applied in organic illnesses are of a physical and biochemical nature. In cases of subjective suffering or behavioural deviances therapy consists of general relief, correction and sedation--all of the kind we make use of in our everyday lives. If the majority of those who consult a doctor are not really ill, what then, is the alternative? Individual and collective misery? The sole alternative to illness is normal psycho-physiological and behavioural variations. A widely held opinion, however, is that non-organic disorders fulfill the criteria for illness. This means that some kind of pathological substrate is postulated even when we fail to demonstrate its existence. The crucial point, however, is not to solve the problem of whether a person is ill or not, but to underline that we are dealing with two separate categories of phenomena - bio-pathologically and psycho-physiologically founded suffering and dysfunctioning.

Diagnosis↗