Fungal Seed Endophyte FZT214 Improves Dysphania ambrosioides Cd Tolerance Throughout Different Developmental Stages

Phytoremediation is a promising remediation method of heavy metal (HM)–contaminated soils. However, lower HM tolerance of metal accumulator inhibits its practical application and effects. The current study was aimed to illustrate the role of fungal seed endophyte (FZT214) in improving Dysphania ambrosioides Cd tolerance during different developmental stages under various Cd stresses (5, 15, 30 mg kg–1) by pot experiments. The results showed that FZT214 significantly (p < 0.05) improved the host plant’s growth at the flowering and fruiting stage in most of the treatment, while at the growing stage the increase was less (p > 0.05). The seed yield was also improved (p < 0.05) in the FZT214-inoculated plants (E+) and induced early flowering was observed. Moreover, the inoculation also positively affected total chlorophyll content, antioxidant process, and lipid peroxidation in most of the treatments throughout three developmental stages. Not all but in most cases, IAA and GA were more in E+ plants while JA was more in the E− plants (non-inoculated plants) during three developmental stages. The results suggested that the colonization of FZT214 to the D. ambrosioides might trigger multiple and comprehensive protective strategies against Cd stress, which mainly include activation of the dilution effects, induced biochemical changes to overcome damage from Cd toxicity, and alteration of the endogenous phytohormones. FZT214 can find competent application in the future to improve the growth of other crop plants.

Sulphur Poisoning, Water Vapour and Nitrogen Dilution Effects on Copper-based Catalyst Dynamics, Stability and Deactivation during CO2 Reduction Reactions to Methanol

To reduce CO2 emissions, a flexible process operation for chemical methanol synthesis may be required as the supply of renewable energy-based feedstocks fluctuates. Determining the changing conditions’ analysis for the...

Biological effects of high-diluted substances and periodic table of elements

Background and Aims. There are several experimental evidences for the effects of high-diluted substances (see e.g. C. Taddei-Ferretti, A. Cotugno 1997, on effects of high-diluted drugs on the prevention and control of mice teratogenicity induced by purine derivatives; N.C. Sukul, C. Taddei-Ferretti, S.P. Sinha Babu, A. De, B. Nandi, A. Sukul, R. Dutta-Nag 2000, on high-diluted Nux vomica countering alcohol-induced loss of righting reflex in toads). Also the physical characterization and mechanism of action of high-diluted drugs have been studied (see e.g. N.C. Sukul, A. Sukul, High dilution effects: Physical and biochemical basis 2004). However, further experimental researches are needed to clarify how physical characteristics of a drug are linked to its global biological effects. Considerations on some high-diluted mineral remedies will be developer here. Methods. In Organon, sect. 119, S. Hahnemann writes: «As certainly each species of plants is different from every other one with regard to external appearance, way of life and growth, taste and smell, and as certainly each mineral, each salt is different from the others with regard to external, internal, physical and chemical qualities [...], so certainly all these vegetal and mineral substances have pathogenetic – and thus also curative – effects different among themselves [...]». This statement may be taken as basis for considering the characteristics of some elements, as ordered in the periodic table, in relation to those of some high-diluted mineral remedies. Conclusions. The elements were previously ordered in the periodic table according to the atomic weight chemically determined, and later more precisely according to the atomic number (number of protons). Then also the electronic configuration was taken into account: properties depending on atomic mass and deep electrons are not periodical, while chemical and several physical properties are linked to external electrons which have periodical configuration. In particular, let us consider the group of elements C, P, S, Cl and the group of elements Ca, Mg, K, Na. One may conclude that the four elements of the first group (respectively receiver-or-donor of 4 electrons, receiver of 3, of 2, of 1 electron), which, according to H. Bernard, are linked to the fixed human constitutions, are close among themselves in the periodic table, while they are very distant from the four elements of the second group (respectively donor of 2, of 2, of 1, of 1 electron), which are close among themselves and are linked to the changing constitutional stages.

Homeopathy and the science of high dilutions: when to believe the unbelievable

In 1988, a Nature Editorial titled “When to believe the unbelievable” noted that the famous high-dilution experiments of the Benveniste group had no physical basis and suggested that “prudent people should, for the time being, suspend judgment.” In point of fact, judgment was not suspended and in the ensuing weeks the authors were resoundingly condemned and ridiculed for the purported lack of replication of their findings. Twenty-four years later, the concept that a solution diluted beyond the Avogadro-Loschmidt constant may show some biological and pharmacological activity is still “unbelievable” from an ordinary common sense perspective, but things are dramatically changing. Several groups of researchers from countries all over the world have been investigating this difficult question, which has weighty implications not just for pharmacology (homeopathy) but also for biology, physics and the environmental sciences. The XXVI meeting of GIRI (International research group on ultra-low dose and high-dilution effects), scheduled to take place in Florence on 20-22 September 2012, will present a growing body of evidence in favor of the “existence” of high-dilution/dynamization effects. Continuing the excellent work of the preceding editions, the meeting features a rich and outstanding program organized into four main tracks: physico-chemical features of high dilutions; studies done in planta and in the field; clinical and veterinary evidence; and laboratory models. ... For two centuries, homeopathy and science have been regarded as two opposing and conflicting fields. Now things are changing, as scientific evidence begins to support many homeopathic tenets, and the homeopathic world increasingly stimulates science to investigate previously under-evaluated and little understood subtle phenomena. For over 26 years from the foundation, the international GIRI group has been stimulating fruitful dialogue in the interest of furthering true science—i.e., that which is free from ideological barriers and pre-judgments. Quite often, scientific “dogmas” have been disrupted by new evidence, or previously dismissed phenomena have gained importance in the light of a new conceptual framework. The unusual properties of high dilutions/dynamizations, which merit further investigation, are potentially relevant not just to homeopathic pharmaceutical science, but also to agriculture (“agrohomeopathy”), environmental sciences and, in general, to the future of mankind.

The dilution effect in a freshwater mutualism: impacts of introduced host species on native symbionts

The dilution effect was originally proposed to describe the negative effect of increased host diversity on parasite abundance; with greater host diversity, parasite levels per host are predicted to be lower due to a higher probability of dispersing parasites encountering non-competent hosts. Dilution effects could also occur in many mutualisms if dispersing symbionts encounter hosts that vary in their competency. The introduction of non-native hosts can change community competency of a local group of host species. Crayfish introductions are occurring world-wide and these introductions are likely disrupting native crayfish-symbiont systems. Branchiobdellidan symbionts declined on native Cambarus crayfish occurring in the presence and absence of non-native Faxonius crayfish in the New River, USA. We performed an experiment investigating the effect of host density (1 vs 2 native hosts) and host diversity (1 native host and 1 introduced host) on branchiobdellidan abundance. The introduced F. cristavarius is a non-competent host for these worms. Six C. ingens were stocked on a C. chasmodactylus in each treatment and worm numbers were followed over 34 days. Worm numbers decreased over time on C. chasmodactylus alone and in the treatment in which a C. chasmodactylus was paired with an F. cristavarius. Worm numbers remained highest in the 2 C. chasmodactylus treatment . There was no significant effect of host diversity on worm reproduction. Crayfish invasions may have negative effects on mutualistic symbionts depending on the competence of introduced hosts. Loss of native symbionts is one of the potential hidden, negative effects of invasions on native freshwater diversity.

Immunological research about ultra-high dilution and Homeopathy: From 1994 to 2014

Background: This review is part of a special issue of journal “Homeopathy” (ELSEVIER) scheduled for publication in 2015, about the follow-up of researches published in the book titled “Ultra-High Dilution, Physiology and Physics”, written and edited by PC Endler and J Schulte in 1994. In this book, Prof. Madeleine Bastide described experimental models in immunology that were used during the 1980s to investigate high dilution effects on several biological systems. Bastide categorized available papers in four categories: high dilutions of antigens; high dilutions of thymus, bursa and other hormones; high dilutions of cytokines and immunopharmacological activity of silica. The studies about high dilutions of antigens were interrupted from this time onwards. Only the in vitro models developed on antigens and histamine dilutions lasted up to 2009. During this process, a huge multi-centre study was performed, with high reproducibility, and involving different independent laboratories. The studies about highly diluted cytokines, thymulin and other hormones brought some regulatory properties of endogenous substances prepared homeopathically, with special focus on epigenetic mechanisms of highly diluted cytokines. The frequently studied substance was Thymulin 5cH, which improved the activity of phagocytes in viral, bacterial and parasitic infections. Studies about the immunopharmacological activity of silica have assumed a new focus: the putative role of silica as active contaminant present in high dilutions, that is still under discussion.

Group Testing for SARS-CoV-2 Allows for Up to 10-Fold Efficiency Increase Across Realistic Scenarios and Testing Strategies

Background: Due to the ongoing COVID-19 pandemic, demand for diagnostic testing has increased drastically, resulting in shortages of necessary materials to conduct the tests and overwhelming the capacity of testing laboratories. The supply scarcity and capacity limits affect test administration: priority must be given to hospitalized patients and symptomatic individuals, which can prevent the identification of asymptomatic and presymptomatic individuals and hence effective tracking and tracing policies. We describe optimized group testing strategies applicable to SARS-CoV-2 tests in scenarios tailored to the current COVID-19 pandemic and assess significant gains compared to individual testing.Methods: We account for biochemically realistic scenarios in the context of dilution effects on SARS-CoV-2 samples and consider evidence on specificity and sensitivity of PCR-based tests for the novel coronavirus. Because of the current uncertainty and the temporal and spatial changes in the prevalence regime, we provide analysis for several realistic scenarios and propose fast and reliable strategies for massive testing procedures.Key Findings: We find significant efficiency gaps between different group testing strategies in realistic scenarios for SARS-CoV-2 testing, highlighting the need for an informed decision of the pooling protocol depending on estimated prevalence, target specificity, and high- vs. low-risk population. For example, using one of the presented methods, all 1.47 million inhabitants of Munich, Germany, could be tested using only around 141 thousand tests if the infection rate is below 0.4% is assumed. Using 1 million tests, the 6.69 million inhabitants from the city of Rio de Janeiro, Brazil, could be tested as long as the infection rate does not exceed 1%. Moreover, we provide an interactive web application, available at www.grouptexting.com, for visualizing the different strategies and designing pooling schemes according to specific prevalence scenarios and test configurations.Interpretation: Altogether, this work may help provide a basis for an efficient upscaling of current testing procedures, which takes the population heterogeneity into account and is fine-grained towards the desired study populations, e.g., mild/asymptomatic individuals vs. symptomatic ones but also mixtures thereof.Funding: German Science Foundation (DFG), German Federal Ministry of Education and Research (BMBF), Chan Zuckerberg Initiative DAF, and Austrian Science Fund (FWF).