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One of the most important phases of plant evolution occurred approximately 460-480 million years ago when photosynthetic organisms developed the capacity to colonize land. This transition to harsh terrestrial conditions would have required the ability to resist new abiotic stresses, including desiccation and UV radiation, as well as the development of mechanisms to promote progeny dispersal. It is likely that polysaccharide and cuticular cell walls were essential for the transition to a terrestrial environment and yet the evolutionary origins of their biosynthesis are not well understood. In collaboration with Dr. William Willats (University of Copenhagen), Dr. David Domozych (Skidmore College). Dr. Jeffrey Doyle and Dr. Iben Sørensen (Cornell University), we are addressing the hypothesis that the origins of plant cell walls occurred during divergence within the Charophycean green algae (CGA), which represent the closest living relatives to land plants (embryophytes). Characterization of the ...

A brief investigation was made into whether the apparatus developed for characean cells could be applied to higher plants. A seedling of broccoli (Brassica oleracea var. bolrytis) was mounted on the apparatus shown in Fig. 6. Upon dropping the glass tubing onto the hypocotyl, a significant change in the electrical potential was induced, the amplitude of which increased with increase in H. (Fig. 10). Thus, this apparatus developed for internodal cells of Characeae is also useful for analysis of electrical responses of higher plants to mechanical stimuli.. ...

Augmented population headcounts at these sites coinciding with the timeframe when, down south, was the arriving of the Shulaveri and Berbers (imo), means most likely one thing: Run north from the incoming intimidating others and local populations had no option but to move northbound around the Serra da Estrela mountain range, keep running until you bump into the other huge Iberia River. The Douro River. There, where you cant cross is the Coa Valley where humans between 3500 BC and 2000 BC cluster (again *533). Works done in the last 50 years in the area clearly show this spurs of population increase at times. Whatever words one uses to characterize the events that englobes and defines Chalcolithic Portugal it cannot be applied there, even later periods of bell beaker, social complexity and so forth. Is not there. Ever. They were left to be, serenely has they were, because the bell beakers moved southbound the Serra da Estrela Mountain range, being that the reason why Madrid is south of Cuenca ...

Lab assignment in which students examine different types of microfossils and pick condont elements and foraminifera from sediments and then photograph their specimens using the SEM

Went to South Padre Island today, and this time, I wasnt there digging up the beach. Instead, I was there for a networking lunch at a little conference my buddy Mike (King Midas) Persans was hosting on plant membranes. While I had nothing to do with plant membranes, they had one of the program directors from the ...

Smith, J.R., 1985: The electrical properties of plant cell membranes iii. the effects of insulated regions upon the cable properties and measured membrane conductance of charophytes

This teaching and learning web-site is intended as an introduction to micropalaeontology. Micropalaeontology is the study of microfossils (any fossil generally less than 1mm in size). This page covers calcareous nannofossils.

African pygmy toads of the genus Poyntonophrynus are some of the least known species of African toads. The genus comprises ten recognized species endemic to sub-Saharan Africa, five of which are restricted to southwestern Africa. Recent field research in Angola provided new material for three species of Poyntonophrynus, including a morphologically distinctive population from the Serra da Neve Inselberg. Based on a combination of external morphology, high-resolution computed tomography scanning, and molecular phylogenetic analysis, the Serra da Neve population is described as new species that is nested within the genus. The most striking character that differentiates the newly described species from its congeners is the lack of a tympanic middle ear, a condition common in the family Bufonidae, but so far not known for Poyntonophrynus. The description of this new species from southwestern Angola reinforces the biogeographic importance of the region and further suggests that southwestern Africa is the

Coleochaete is a genus of parenchymatous charophyte green algae in the order Coleochaetales.[1] They are haploid, reproduce both sexually and asexually, and have true multicellular organisation, with plasmodesmata communicating between adjacent cells. The plants form flat, sprawling discs on solid surfaces in freshwater streams worldwide, usually as epiphytes on aquatic plants or growing on the surface of stones. They are seen as one of two most probable sister groups to land plant species,[2][3][4] the second candidate group being the Characeae. The issue is still not resolved.[4] As they show some of the earliest and simplest features of multicellular plant growth, they are ideal model organisms in the field of synthetic biology.[citation needed] They are easy to culture and techniques that have been used to study Arabidopsis thaliana are now being applied to Coleochaete.[5] Coleochaete has a sterile jacket of cells that surround the gametangia and zygotes that are protected by a layer of ...

The park was created to protect the prehistoric artifacts and paintings found there. It became a World Heritage Site in 1991. Its head archaeologist is Niède Guidon. Its best known archaeological site is Pedra Furada. Scientific studies confirm that the Capivara mountain range was densely populated in the pre-Columbian Era.[citation needed] A newer site is Toca da Tira Peia, where the stone tools found may date to as early as 22,000 years ago. The site has been dated through optically stimulated luminescence.[5] Other important archaeological sites in the area are Toca da Pena, Baxao da Esperanca, and Sitio do Meio. Lapa do Boquete site is located directly south.[6] ...

Hybridoma technology has been used successfully to generate monoclonal-antibody probes against protoplast membrane antigens. Hybridomas secreting monoclonal antibodies that either inhibit or stimulate a putative plasma-membrane marker enzyme, (K+ + Mg2+)-stimulated pH 6.5 ATPase, have been identified and cloned. The specificity of monoclonal-antibody probes on the activity of other phosphate-hydrolysing enzymes has also been examined. The production and identification of monospecific antibodies capable of immunoreacting with particular component proteins in a complex plant membrane mixture highlight the usefulness of hybridoma methodology for the enzymologist, especially since such monoclonal antibodies can be used in the purification of proteins by immunoaffinity techniques. ...

Microscopic fossils found in Australia decades ago appeared to show evidence of life dating back almost 3.5 billion years, but have since been contested. New analysis shows that the microfossils are indeed biological, and the find may have implications for the likelihood of extraterrestrial life.

Abstract: O presente trabalho teve por objetivo estudar a biologia e distribui o de Imparfinis minutus na microbacia do Ribeir o Grande (22o47′08′′S, 45o28′17′′W), serra da Mantiqueira oriental, nos períodos de julho e outubro de 2001 e janeiro e abril de 2002. Dentre as 37 espécies amostradas, I. minutus (Siluriformes, Heptapteridae) distribuiu-se desde o pediplano, até a planície do Vale do Paraíba, e esteve associada a ambientes pouco profundos, com substrato constituído principalmente por pedra, cascalho e matac o. O comprimento total dos indivíduos na popula o variou de 4,75 a 12,75 cm. A curva ajustada da rela o peso-comprimento para a popula o foi p = 0,0052 C3,13. Os fatores de condi o alométrico (Ka) e relativo (Kr) apresentaram tendências semelhantes, mostrandose baixos em julho, atingindo valores mais altos em abril. Com respeito à rela ogonadossomática (RGS) de fêmeas, os valores foram mais elevados em outubro e janeiro, o que sugere que a atividade ...

uuid: ca196e1f-ec21-44dc-9b25-44a266cd84d5, type: records, etag: 1c5ea01705ec700c4ef4a1a1f2db40d8e636977a, data: { dwc:startDayOfYear: 60, dwc:specificEpithet: puttemansianum, dwc:recordedBy: A. Puttemans, dcterms:references: http://mycoportal.org/portal/collections/individual/index.php?occid=143829, dwc:scientificNameAuthorship: Henn., dwc:occurrenceID: 143829, dwc:stateProvince: São Paulo, dwc:eventDate: 1903-03-01, dwc:country: Brazil, idigbio:recordId: urn:uuid:fda2d0e2-1852-45c4-bd2e-2131454f4062, dwc:typeStatus: isotype, dwc:basisOfRecord: PreservedSpecimen, dwc:genus: Aecidium, dwc:family: Uredinales incertae sedis, symbiota:verbatimScientificName: Aecidium puttemansianum, dwc:rights: http://creativecommons.org/licenses/by-nc-sa/3.0/, dwc:locality: Serra da Cantareira, dwc:institutionCode: NY, dwc:catalogNumber: 00611323, dwc:month: 3, dwc:recordNumber: 676, dcterms:modified: 2014-01-20 ...

Conservation groups in Portugal have set up education programmes to try and reverse traditional intolerance to wolves among agricultural communities, and are working to increase the use of livestock guarding dogs - there are two traditional Portuguese breeds, the Castro Labroreiro and the Serra da Estrela - to protect flocks from wolves ...

Recent lines of evidence, including 40Ar/39Ar ages (Kowallis et al., 1998), magnetostratigraphy (Steiner, 1998), spores and pollen (Litwin et al., 1998), and charophytes and ostracods (Schudack et al, 1998), agree the Morrison Formation is predominantly of Kimmeridgian age, although the lowermost units may be latest Oxfordian and the uppermost earliest Tithonian. [Multiple sources for different data in the same sentence ...

books.google.comhttps://books.google.com/books/about/Aspects_of_Palynology.html?id=Kr6zAAAAIAAJ&utm_source=gb-gplus-shareAspects of Palynology ...

FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene encodes a lipase that hydrolyzes galactolipids, the main components of plant membrane lipids. An allelic polymorphism in this gene results in both coding and non-coding variants; the reference genome represents the non-coding allele. [provided by RefSeq, Aug 2015 ...

FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene encodes a lipase that hydrolyzes galactolipids, the main components of plant membrane lipids. An allelic polymorphism in this gene results in both coding and non-coding variants; the reference genome represents the non-coding allele. [provided by RefSeq, Aug 2015 ...

Scientists claim that a new analysis of ancient rocks all but confirms that 3.4-billion-year-old microfossils contained some of Earths earliest life-forms.

Cultural geology in my eye is the interface of geology and human culture, Joe Hannibal said.. Joe Hannibal is curator of invertebrate paleontology at the Cleveland Museum of Natural History. Hes a fossil expert, but hes also used his fossil and rock identification skills to track the movements of cultural materials.. When the Euro-Americans came into different parts of the country, they would first establish mills. Well, a lot of those mills have then burned down, Hannibal said. But millstones, well, theyre made out of stone.. Hannibal was examining some historic millstones in Ohio when he noticed they contained tiny spheres of fossilized algae, called charophytes.. So I wrote in my notebook, charophyte? and came back and realized, oh my galoshes, these are charophytes and they must mean something and theyre telling me something, Hannibal said. Both Ohioans and Europeans made millstones out of a type of stone called chert, but only millstones from the Paris Basin contained ...

Newly discovered microfossils, about 3.42 billion years old, are the oldest evidence to date of a particular type of methane-cycling microbial life - and they could help us understand how life began , both on Earth and further out in the Universe.. These life forms would have originally existed just below the seabed in pockets of a rich liquid soup, created from the mixture of colder seawater from above and hotter hydrothermal fluids rising from the sea. depths.. The new findings may answer some of the questions about how and where life began in the Paleoarchean era (3.2-3.6 billion years ago), or whether indigenous microorganisms like this existed even earlier in Earths history.. The outcrop from which a sample was taken. (Cavalazzi et al., Science Advances, 2021). We found exceptionally well-preserved evidence of fossilized microbes that appear to have thrived along the walls of cavities created by hot water from hydrothermal systems a few meters below the seabed, says paleontologist ...

Oncotarget. 2017 Nov 21;8(59):100582-100592 Authors: Zhu C, Xu Y, Duan Y, Li W, Zhang L, Huang Y, Zhao W, Wang Y, Li J, Feng T, Li X, Hu X, Yin W ...

The fossilized dinoflagellate cysts that are found in rock deep beneath the Earths surface only measure about the size of a tiny pencil dot, but they tell paleontologist Lucy Edwards a lot about our groundwater.. Edwards, an AAAS fellow who works for the U.S. Geological Survey (USGS) in Reston, Va., has studied the microfossil algae cysts-the empty shells left over from one life cycle stage of the dinoflagellate-since working on her Ph.D. thesis in the mid-1970s.. Most paleontologists study the organism for a reason. The reason for me had always been biostatigraphy-using fossils to tell the age of the rock, and using the age of the rock to make predictions about the history of the rock to help find oil, water, or salt, Edwards says.. Working as a paleontologist for USGS means constantly uncovering secrets under the Earths surface. You can never get bored here and you can never run out of material, she says.. Thats why shes been at her job for more than three decades. I tell people Im ...

Analyses of morphological and ultrastructural characters, and also of the information carried by gene sequences have established that green algae belonging to the class Charophyceae gave rise to the more than 500,000 land plant species currently inhabiting our planet [1, 2]. Charophycean green algae and land plants form the green plant lineage Streptophyta [3], whereas most, if not all, of the other extant green algae belong to the sister lineage Chlorophyta [2]. In contrast to the large diversity of land plants, only a few thousands charophycean species are living today. Six monophyletic groups are currently recognized in the Charophyceae: the Mesostigmatales [4] represented by Mesostigma viride, a scaly biflagellate that has long been thought to be a member of the Prasinophyceae (the earliest-diverging lineage of the Chlorophyta) [5]; the Chlorokybales represented as well by a single species (Chlorokybus atmophyticus); the Klebsormidiales (3 genera, 45 spp.); the Zygnematales (~ 50 genera, ~ ...

The upper Peechee Member of the Ancient Wall reef complex that is well exposed on the southeast margin of Mount Haultain represents the end of the first main depositional cycle of this complex. The uppermost part forms a 15-30 m thick carbonate sequence that extends basinward over deeper water fore-reef detritus and is divisible into three distinct layers: the lower two consist mainly of stromatoropoid and coral bioherms and biostromes and associated calcarenites and calcilutites; the uppermost consists of five small micrite and wackestone bioherms 7.5-22 m long and 4-6 m high; three of these grew around and on top of a 30 m wide stromatoporoid-coral biostrome. Frame-building organisms include laminar and hemispherical colonies of Phillip-sastrea, renalcid algae (often associated with small fenestral cavities), encrusting calcareous algae (Sphaerocodium), and laminar stromatoporoids. Renalcid encrustations of micrites and wackestones on the vertical sides and undersides of bioherms indicate that ...

In the Serra da Mantiqueira, located 170 kilometers from the city of São Paulo and approximately 1700 meters of altitude, is Campos do Jordão, Brasils highest and coldest city, located between mountains.. The architecture of the citys buildings takes inspiration in the Swiss style, characteristic of buildings with steep roofs and trim. The fashionable town center of Capivari has excellent hotels, restaurants, pastry shops and malls. Around it, are luxurious residences that resemble chalets and imposing mansions of Norman style.. The cold climate and the fresh air of the mountain are compared to those of Davos Platz, in the Swiss Alps, and those of Chamonix, famous French resort. But Campos do Jordão is ...

Necrosis and ethylene-inducing peptide 1 (Nep1)-like proteins (NLPs) are secreted by several phytopathogenic micro-organisms. They trigger leaf necrosis and immunity-associated responses in various dicotyledonous plants. We identified glycosylinositol phosphorylceramides (GIPC), a major class of plant sphingolipids, as target molecules for NLP binding to plasma membranes. X-ray crystallography revealed that NLP forms complexes with terminal hexose moieties. NLP binding to GIPC head groups induces several conformational changes within the toxin that precedes membrane attachment and host cell lysis. This study unveils early steps of NLP cytolysin action and explains why dicot plants are NLP toxin-sensitive whereas monocot plants are not.

Acanthocéphales,Amphibiens,Angiospermes,Annélides,Arachnides,Ascidies,Bivalves,Chlorophytes et Charophytes,Crustacés,Céphalopodes,Diatomées,Entognathes,Gastéropodes,Gymnospermes,Hydrozoaires,Hépatiques et Anthocérotes,Insectes,Lichens,Mammifères,Mousses,Myriapodes,Nématodes,Némertes,Ochrophytes,Octocoralliaires,Oiseaux,Plathelminthes,Poissons,Ptéridophytes,Pycnogonides,Reptiles,Rhodophytes,Scléractiniaires ...

Acanthocéphales,Amphibiens,Angiospermes,Annélides,Arachnides,Ascidies,Bivalves,Chlorophytes et Charophytes,Crustacés,Céphalopodes,Diatomées,Entognathes,Gastéropodes,Gymnospermes,Hydrozoaires,Hépatiques et Anthocérotes,Insectes,Lichens,Mammifères,Mousses,Myriapodes,Nématodes,Némertes,Ochrophytes,Octocoralliaires,Oiseaux,Plathelminthes,Poissons,Ptéridophytes,Pycnogonides,Reptiles,Rhodophytes,Scléractiniaires ...

Introduction: Sleep as a widespread physiological phenomenon is seen in all vertebrates. In primates as human, the sleep consists of two components REM & non-R...

The Estrela Mountain Dog takes its name from the Serra da Estrela, a mountain range in mid Portugal. Because of its remote location, it is impossible to determine the origin of the breed, but it is believed to be one of the oldest breeds of the Iberian Peninsula. In the summer, shepherds moved the sheep up to the high mountain pastures where the Estrela Mountain Dog guarded the flocks. In the winter, when sheep were moved to the foot of the mountains, these same dogs guarded the shepherds households and occasionally served as draft animals. During the 1930s, Portugal underwent a revival of interest in their native breeds, and produced the first breed standard for the Estrela in 1933. The earliest dog as recorded by the American breed club was brought into the United States in 1998, although it is known that some were imported several years earlier. The Estrela Mountain Dog was recognized by United Kennel Club in 1996. ...

Researchers from Tubingen resolve how a plant steroid hormone makes plants grow. If one wants to better understand how plants grow, one must analyze the chemistry of life in its molecular detail. Michael Hothorn from the Friedrich-Miescher-Laboratory of the Max Planck Society in Tübingen and his team are doing just that. Their latest work now reveals that a plant membrane receptor requires a helper protein to sense a growth-promoting steroid hormone and to transduce this signal across the cell membrane.. Every cell is surrounded by a greasy cell membrane. Signals from other cells and from the environment must be sensed at the cell surface, transduced across this membrane and translated into a specific response inside the cell. All organisms have evolved membrane receptor proteins to get these complex tasks done, but plant membrane receptors look drastically different from the well-studied players in animals and bacteria. The plant steroid receptor BRI1, which can sense a small steroid hormone ...

Plant membranes are relatively permeable to K+ due to various selective K+ channels across the membrane. Basically, one distinguishes between low-affinity K+ channels and high-affinity channels. For the function of the low-affinity channels, the electrochemical difference between the cytosol and the outer medium (liquid in root or leaf apoplast) is of decisive importance. The K+ is imported into the cell for as long as the electrochemical potential in the cytosol is lower than in the outer solution. With the import of the positive charge (K+) the electrochemical potential increases (decrease of the negative charge of the cytosol) and finally attains that of the outer medium, equilibrium is attained, and there is no further driving force for the uptake of K+ (15). The negative charge of the cytosol is maintained by the activity of the plasmalemma H+ pump permanently excreting H+ from the cytosol into the apoplast and thus maintaining the high negative charge of the cytosol and building up an ...

Serra RX80® Serra RX80 is a high potency pure serrapeptase with 80,000 SPU of activity per serving. Serra RX80 is a powerful systemic enzyme that supports the bodys healthy responses to injury and surgery, inflammation, mucus production, respiratory function, and scar tissue production and break down. Produced by the worlds leading experts in serrapeptase, Serra

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Pousada Ares da Serra, Gramado: See traveller reviews, 133 candid photos, and great deals for Pousada Ares da Serra, ranked #3 of 122 B&Bs / inns in Gramado and rated 5 of 5 at TripAdvisor.

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Age-related changes in malondialdehyde and glutathione levels of gastric mucosa of the rats and effects of exogenous melatonin ...

Metaphase chromosomes were analyzed in Aplastodiscus perviridis from the locations: Morro do Ferro (MG), Serra da Bocaina (SP), Botucatu (SP), and in Hyla albopunctata found at: Morro do Ferro, Botucatu, and Campinas (SP). A significant quantity of metaphases with structural alterations were found in the Morro do Ferro population. These alterations were classified as: decondensation, condensation, breaks, gaps, deletions and acentric fragments. Breaks, deletions and fragments were the most frequent alterations and a great number of these occurred near centromeric heterochromatin. The frequency of altered metaphases varied among individuals in all populations studied. The majority of the alterations can probably be attributed to the high level of natural radiation at Morro do Ferro ...

The paper concerns a microfauna of well-preserved radiolarians, foraminifers, and conodonts discovered in unusually large concretions occurring in black shale. The microfossils are recovered by dissolving pieces of the concretions in a diluted solution of formic acid. The assemblage is unusual because radiolarians of this age are very scarce and also because the microfossils occur in strata deposited on the near shore margin of the epicontinental interior sea present in Pennsylvanian time. Present day radiolarians are floating organisms that are found mostly in the upper part of the open ocean far from shore. Their tiny siliceous remains are very abundant in ocean bottom deposits at great depths. ...

Zdeno Chara leans toward joining Europe If you play fantasy sports, get breaking news and immerse yourself in the ultimate fan experience.

A frightening hit by Zdeno Chara put Montreals Max Pacioretty in the hospital, but the N.H.L. will not issue any further sanctions in the incident.

has moved to a new address:. Farmacia Serra Genova: Sambuco come funziona, per cosa si usa. Sorry for the inconvenience… Redirection provided by Blogger to WordPress Migration Service ...

Grup Serra marketleri konaklar şubesi Beykoz - Zerzavatçı Mah semtelerine online sipariş hizmeti. Anında kapınızda teslimat ücreti yok.

Consorci de Serveis Universitaris de Catalunya CSUC bietet Stelle als Opening of Academic Positions / The Serra Húnter (f/m/d) in Katalonien (Spanien) - jetzt bewerben!

One of my favorite books is A.de Saint Exuperys Little Prince. I often get reminded of this quote when talking about B&W photography: Here is my secret. It is very simple. It is only with the heart that one can see rightly; What is essential is invisible to the eye.. Once I have read that even Ansel Adams would had been an average Joe if he did not master light in his darkroom .. I disagreed a bit as if there was not a good basis to the exposure of his negatives in a first place, it would be difficult to achieve such depth to his images as much as he could try in darkroom … but what makes his work so spectacular is in my opinion Him …. … well here is where another big part of a successful B&W photography takes its place … as all you see with your eyes is not all there is (including the light) .. It is very important that one photographs with his/her heart or soul and looks within for the reflections of it deep inside the photographed subject (have you ever noticed how when shooting ...

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After Zdeno Chara flips Mark Scheifele stick in the air, Scheifele retrieves it and buries a feed from Patrik Laine for a power-play goal

Zehra Ayhan, Donatella Duraccio, Birgül Özcan, Okan Eştürk, Serra Nalçabasmaz, Clara Silvestre, Sossio Cimmino, Gülsüm Erol, Murat Altan and Bengisu Toplu. B034 ...