Especially during early developmental stages, competition with weeds can reduce crop growth and have a serious effect on productivity. Here, the effects of interactions between soil water content (SWC), nutrient availability, and competition from weeds on early stage crop growth were investigated, to better understand this problem. Field experiments were conducted in 2013 and 2014 using long-term study plots on loam soil in Hungary. Plots of maize (Zea mays L.) and a weed-maize combination were exposed to five fertilization treatments. SWC was observed along the 0-80 cm depth soil profile and harvested aboveground biomass (HAB) was measured. Significant differences were found between SWC in maize and maize-weed plots. In all treatments, measured SWC was most variable in soil depths of up to 50 cm, and at the 8-10 leaves (BBCH19) growth stage of the crop. The greatest depletion of SWC was detected within PK treatments across the entire soil profile and under both vegetation types, with depletion also considerable under NPK and NP treatments. Biomass growth was significantly influenced by weeds in treated plots between the BBCH 13 and 19 phenological stages, but water availability did not hamper growth rates in non-fertilized conditions. These findings suggest that, at early stages of crop growth, SWC model simulations need to include better characterisation of depth- and structure-dependent soil water uptake by vegetation.
Morphological characteristics of ripples are analyzed considering bed surfaces as two dimensional random fields of bed elevations. Two equilibrium phases are analyzed with respect to successive development of ripples based on digital elevation models. The key findings relate to the shape of the two dimensional second-order structure functions and multiscaling behavior revealed by higher-order structure functions. Our results suggest that (1) the two dimensional second-order structure functions can be used to differentiate the two equilibrium phases of ripples; and (2) in contrast to the elevational time series of ripples that exhibit significant multiscaling behavior, the DEMs of ripples at both equilibrium phases do not exhibit multiscaling behavior.
Chemische Analyse der (festen) schwarzen organischen Substanzen auf der Keramik der Púchov-Kultur von Liptovská Mara (und Vergleichung mit dem Material vom mitelalterlichen Herstellungsobjekt in Varín).
Karcinóm žalúdka je smrteľná choroba a je stále druhá najčastejšia príčina úmrtí na rakovinu na celom svete. Chirurgický zákrok s kompletnou resekciou tumoru, ktorá má kuratívny potenciál, zostáva hlavnou terapiou pre skoré štádiá. Bohužiaľ, väčšina pacientov s rakovinou žalúdka je diagnostikovaná v pokročilom štádiu, čím paliatívna systémová liečba zostáva jedinou liečebnou možnosťou. Najčastejšia kombinácia chemoterapie ako liečby prvej línie na liečbu pokročilého karcinómu žalúdka (PKŽ) zahŕňa zlúčeniny platiny a fluoropyrimidínov. Fluoropyrimidíny sú chrbtovou kosťou chemoterapeutických režimov pre liečbu karcinómu žalúdka. Teysuno® (S-1) je perorálny štvrtogeneračný fluoropyrimidín, v ktorom sa kombinuje tegafur, čo je prekurzor 5-fluorouracilu (5-FU) a dva biochemické modulátory: (1) 5-chlór-2,4-dihydroxypyridín, čo je silný, ale reverzibilný inhibítor dihydropyrimidíndehydrogenázy, ktorá bráni degradácii 5-FU, a (2), oxonát draselný, ktorý znižuje gastrointestinálnu (GI) toxicitu inhibíciou 5-FU fosforylácie v gastrointestinálnej sliznici. Teysuno® (S-1) ako monoterapia je štandard na adjuvantnú liečbu resekovaného karcinómu žalúdka v Japonsku a v kombinácii s cisplatinou v pokročilom ochorení na základe úrovne 1 dôkazu v klinických štúdiách fázy III. S-1 je teraz široko dostupný a bol schválený v európskych krajinách pod obchodným názvom Teysuno® ako liečba prvej línie pri PKŽ. S-1 je všeobecne dobre znášaný a vykazuje nízky toxický profil. Je to nový liek, ktorý poskytuje výhodu pohodlného a bezpečného perorálneho podávania proti intravenóznemu fluoropyrimidínu v PKŽ., Gastric cancer is a lethal disease and continues to be the second leading cause of cancer death worldwide. Surgical resection remains the main treatment for early stages with complete resection having the potential for a cure. Unfortunately, most patients with gastric cancer are diagnosed in advanced stages, rendering palliative systemic therapy as the only choice of treatment. The most common chemotherapy combination as a first-line treatment in advanced gastric cancer (AGC) includes a platinum compound and fluoropyrimidine. Fluoropyrimidines have been the backbone in the chemotherapy regimens for the treatment of gastric cancer. Teysuno® (S-1) is a peroral fourth-generation fluoropyrimidine that combines tegafur, which is a prodrug of 5-fluorouracil (5-FU), and two biochemical modulators: 5-chloro-2,4-dihydroxypyridine, a powerful but reversible inhibitor of dihydropyrimidine dehydrogenase that prevents 5-FU degradation, and potassium oxonate, which reduces gastrointestinal (GI) toxicity by inhibition of 5-FU phosphorylation in the GI mucosa. Teysuno® (S-1) is considered, as a single agent as the standard of care in Japan for the adjuvant treatment of resected gastric cancer and in combination with cisplatin in the advanced setting based on level 1 evidence in Phase III trials. S-1 is now widely available and has been approved in European countries with trade name Teysuno® as a first-line treatment for AGC. S-1 is generally well tolerated with a low toxicity profile. It is a novel agent that provides a convenient and safe peroral advantage over intravenous fluoropyrimidine in AGC., Tomáš Šálek, and Literatura
Tak ako orgánovovaskulárne artériové ischemické choroby (srdcovocievne, cievnocievne, nervovocievne, končatinovocievne, obličkovocievne, pohlavnocievne, pľúcnocievne, črevnocievne, kostnokĺbovosvalovocievne, kožnocievne, očnocievne, ušnocievne, zubnocievne a ďalšie orgánovocievne artériové choroby) aj aortové choroby prispievajú k širokému spektru artériových chorôb: aneuryzmy aorty, akútne aortové syndrómy vrátane aortovej disekcie, intramurálneho hematómu, penetrujúcej aterosklerotickej ulcerácie, ďalej traumatické poškodenie aorty, pseudoaneuryzma, ruptúra aorty, ateroskleróza, vaskulitídy, ako aj genetické choroby (napr. Turnerov syndróm, Marfanov syndróm, Ehlersov‑Danlosov syndróm) a kongenitálne abnormality vrátane koarktácie aorty. Podobne ako iné artériové choroby, aj aortové choroby môžu byť diagnostikované po dlhom časovom období subklinického vývinu alebo sa manifestujú akútne. Akútny aortový syndróm je často prvým znakom choroby, ktorá vyžaduje rýchlu diagnózu, rýchle rozhodnutie a rýchlu akciu k zníženiu extrémne nepriaznivej prognózy. V dokumente sa analyzujú kľúčové klinicko‑etiologicko‑anatomicko‑patofyziologické diagnostické aspekty, klasifikácia a princípy manažmentu aortových chorôb (projekt CIEVY)., In addition to organovascular arterial ischemic diseases (cardiovascular, angiovascular, neurovascular, limbovascular, renovascular, genitovascular, bronchopulmonarovascular, mesenteriointestinokolonovascular, osteoarthromusculovascular, dermovascular, oculovascular, otovascular, stomatovascular, etc.), aortic diseases contribute to the wide spectrum of arterial diseases: aortic aneurysms (AA), acute aortic syndromes (AAS) including aortic dissection (AD), intramural hematoma (IMH), penetrating atherosclerotic ulcer (PAU) and traumatic aortic injury (TAI), pseudoaneurysm, aortic rupture, atherosclerosis, vasculitis as well as genetic diseases (e. g. Turner syndrome, Marfan syndrome, Ehlers‑Danlos syndrome) and congenital abnormalities including coarctation of the aorta (CoA). Similarly to other arterial diseases, aortic diseases may be diagnosed after a long period of subclinical development or they may have an acute presentation. Acute aortic syndrome is often the first sign of the disease, which needs rapid diagnosis and decision making to overcome the extremely poor prognosis. Key clinical‑etiology‑anatomy‑pathophysiology (CEAP) diagnostic aspects and principles of aortic disease management are discussed in this document (the Vessels project)., and Gavorník P., Dukát A., Gašpar Ľ., Medová D., Čaprnda M.