Characteristics of dioxane-soluble lignins from corn and sorghum silages and feces of sheep fed on them

1993 ◽  
Vol 73 (3) ◽  
pp. 661-664
Author(s):  
Tsuneo Kondo ◽  
Tomoko Ohshita ◽  
Tadashi Kyuma
Keyword(s):  
Key Words ◽  
Digestive Tract ◽  
Phenolic Acid ◽  
Structural Changes ◽  
Analytical Data ◽  
Molecular Weights ◽  
Soluble Lignin ◽  
Acid Esters

Dioxane-soluble lignin fractions were isolated from corn and sorghum silages, and the feces of sheep fed on them and their properties were examined. The lignin fractions were composed chiefly of soluble lignin fragments with different molecular weights and contained phenolic acid esters as non-core lignin components. A comparison of the analytical data showed that the soluble lignins from the silages had different properties from those of corresponding feces, suggesting structural changes of lignins in the digestive tract of sheep. Key words: Dioxane-soluble lignin, silage, corn, sorghum, sheep digestion

INTERPRETATIONAL FIELD OF THE CONCEPT “WOMAN” IN ENGLISH AND KYRGYZ LINGUOCULTURES

2019 ◽  
pp. 54-56
Author(s):  
Баяманова М.С.
Keyword(s):  
Comparative Study ◽  
Key Words ◽  
Analytical Data ◽  
Semantic Field ◽  
Traditional Values ◽  
Lexical Unit ◽  
Semantic Fields ◽  
Field Culture

Summary: The article deals with the analysis of the interpretational field of the basic lexical units which represent the meaning of the concept “woman” in English and Kyrgyz languages and cultures. Comparative – contrastive analytical data of the most frequently used in both languages variants of the interpretation of the concept “woman” have been given. The semantic fields of nuclear and nearnuclear meanings of the lexical units, transforming the notion of “woman” in English and Kyrgyz languages and also the place and role of these notions in cultures and philosophy of the nations on the basis of mentality and traditional values have been studied and described. The situations of the use of this or that variant of the meaning of lexical unit. A comparative study of the definitions of the word “woman’ in English and Kyrgyz languages have been given. Key words: concept, woman, interpretational field, notion, definition, semantic field, culture, language, linguoculture, transformation Аннотация: В статье рассматриваются интерпретационные поля основных лексических единиц, репрезентирующих значение концепта «женщина» в английской и кыргызской лингвокультурах. Приводятся сравнительно-сопоставительные аналитические данные наиболее употребительных в речи обоих языков вариантов интерпретации концепта «женщина». Изучены и описаны семантические поля ядерных и околоядерных значений лексических единиц, трансформирующих понятие «женщина» в английском и кыргызском языке, а также роль и место этих понятий в культурах и философии народов на основе менталитета и традиционных ценностей. Приводятся ситуации использования того или ино- го варианта значения лексической единицы, проведено сравнительное изучение определений слова «женщина» в английском и кыргызском языках. Ключевые слова: концепт, женщина, интерпретационное поле, понятие, определение, семантическое поле, культура, язык, лингвокультура, трансформация Аннотация: Макалада англис жана кыргыз тилдеринде жана маданияттарында «аял» концептинин маанисин репрезентациалаган негизги лексикалык бирдиктер каралат. «Аял» концептин эки тилдеги кѳп колдонулуучу интерпретациялоо варианттарынын аналитикалык салыштырма маалыматтары изил- делип берилген. Англис жана кыргыз тилдеринде «аял» түшүнүгүн трансформациялаган лексикалык бирдиктердин түп нуска жана ага жакындашкан маанилери иликтелип каралган. Берилген түшүнүктѳрдүн элдик философиясында жана маданиятында, менталитеттин жана салттын негизинде эл арасына кеӊири тараган, элдик тилде жана маданиятта ойногон ролу менен орду чагылдырылган. Ар түрдү ситацияларда колдонулуучу тиги же бул лексикалык бирдиктердин маанисинин варианттары каралган, «аял» деген сѳздун англис жана кыргыз тилдериндеги түшүндүрмѳлѳрү салыштырылып изилделген. Түйүндүү сѳздѳр: концепт, аял, интерпретациялоо мейкиндиги, түшүнүк, түшүндүрмѳ, семантикалык чѳйрѳ, маданият, тил, лингвомаданият, трансформациялоо

Structural Changes in the Digestive Tract of Broilers when Introducing a Probiotic

2021 ◽  
Vol 12 (2) ◽  
pp. 70-77
Author(s):  
Elena Alexandrovna Prosekova ◽  
Valery Petrovich Panov ◽  
Nadezhda Gennadievna Cherepanova ◽  
Anna Eduardovna Semak ◽  
Nina Petrovna Belyaeva ◽  
...  
Keyword(s):  
Digestive Tract ◽  
Structural Changes

scholarly journals Long-chain aliphatic wax esters isolated from the sponge Chalinula saudensis (Demospongia) along the Jeddah coast of the Red Sea

2011 ◽  
Vol 59 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Abdulmohsin Al-Sofyani ◽  
Radwan K Al-Farawati ◽  
Amr A ElMaradny ◽  
Gul R Niaz
Keyword(s):  
Vital Role ◽  
Marine Organisms ◽  
Fatty Acid Esters ◽  
Long Chain Fatty Acid ◽  
Molecular Weights ◽  
Chloroform Layer ◽  
Layer Chromatography ◽  
Preparative Layer Chromatography ◽  
Acid Esters ◽  
Long Chain

The sponge Chalinula saudensis, which occurs along the Jeddah coast, has only recently been isolated and identified. In this study, the total crude organic matter of the sponge was extracted by solvents. The total crude extract was further separated by partitioning it with hexane and water, then with water and chloroform, and finally with water and t-butanol. The chloroform layer was subjected to separation by preparative layer chromatography on silica. One fraction contained four long-chain fatty acid esters, C28H56O2, C30H60O2, C32H62O2 and C36H70 O2. The second ester, C30H60O2, has been identified in the fire corals Millepora dichotoma and Millepora platyphylla. The others have not previously been reported from marine organisms; however similar long-chain esters with different long aliphatic chains and with different molecular weights have been identified from other marine organisms. These compounds are normally waxy and their presence in Chalinula saudensis plays a vital role in the biosynthetic pathways. They also act as insulators against seasonal variations.

In Situ Study of The Exposure of Polycarbonate to an Argon Plasma

1995 ◽  
Vol 385 ◽  
Author(s):  
S. Vallon ◽  
B. Drevillon ◽  
F. Poncin-Epaillard ◽  
J. C. Rostaing
Keyword(s):  
Structural Changes ◽  
Argon Plasma ◽  
Silica Layer ◽  
Molecular Weights ◽  
In Situ Study ◽  
Polar Groups ◽  
Unit Scale ◽  
Two Populations ◽  
Polymer Unit

ABSTRACTThe exposure of polycarbonate to an argon plasma is studied using in situ ellipsometry from the UV to the IR, nuclear magnetic resonance and light scattering measurements. An increase in the refractive index and the existence of two populations of different molecular weights show that structural changes occur in the polymer. They are correlated with modifications at the polymer unit scale, such as formation of new polar groups and decrease in dimethyl groups. Two simultaneous reaction mechanisms must be considered to account for these changes. The adhesion of a silica layer on treated polycarbonate is then discussed.

scholarly journals New Zileuton-Hydroxycinnamic Acid Hybrids: Synthesis and Structure-Activity Relationship towards 5-Lipoxygenase Inhibition

Molecules ◽  
2020 ◽  
Vol 25 (20) ◽  
pp. 4686
Author(s):  
Audrey Isabel Chiasson ◽  
Samuel Robichaud ◽  
Fanta J. Ndongou Moutombi ◽  
Mathieu P. A. Hébert ◽  
Maroua Mbarik ◽  
...  
Keyword(s):  
Phenolic Acid ◽  
Sinapic Acid ◽  
Hydroxycinnamic Acid ◽  
Hek293 Cells ◽  
Product Specificity ◽  
Lipoxygenase Inhibition ◽  
Thiophene Moiety ◽  
Ester Linkage ◽  
Hydroxycinnamic Acid Esters ◽  
Acid Esters

A novel series of zileuton-hydroxycinnamic acid hybrids were synthesized and screened as 5-lipoxygenase (5-LO) inhibitors in stimulated HEK293 cells and polymorphonuclear leukocytes (PMNL). Zileuton’s (1) benzo[b]thiophene and hydroxyurea subunits combined with hydroxycinnamic acid esters’ ester linkage and phenolic acid moieties were investigated. Compound 28, bearing zileuton’s (1) benzo[b]thiophene and sinapic acid phenethyl ester’s (2) α,β-unsaturated phenolic acid moiety 28, was shown to be equipotent to zileuton (1), the only clinically approved 5-LO inhibitor, in stimulated HEK293 cells. Compound 28 was three times as active as zileuton (1) for the inhibition of 5-LO in PMNL. Compound 37, bearing the same sinapic acid (3,5-dimethoxy-4-hydroxy substitution) moiety as 28, combined with zileuton’s (1) hydroxyurea subunit was inactive. This result shows that the zileuton’s (1) benzo[b]thiophene moiety is essential for the inhibition of 5-LO product biosynthesis with our hydrids. Unlike zileuton (1), Compound 28 formed two π–π interactions with Phe177 and Phe421 as predicted when docked into 5-LO. Compound 28 was the only docked ligand that showed a π–π interaction with Phe177 which may play a part in product specificity as reported.

Protein composition of Methanococcus thermolithotrophicus flagella

1992 ◽  
Vol 38 (11) ◽  
pp. 1162-1166 ◽  
Author(s):  
Alla S. Kostyukova ◽  
Georgi M. Gongadze ◽  
Anna Ya. Obraztsova ◽  
Konstantin S. Laurinavichus ◽  
Oleg V. Fedorov
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Key Words ◽  
Gel Electrophoresis ◽  
Polyacrylamide Gel Electrophoresis ◽  
Sodium Dodecyl ◽  
Protein Composition ◽  
Complete Removal ◽  
Methanococcus Thermolithotrophicus ◽  
Molecular Weights ◽  
Dodecyl Sulfate

Sodium dodecyl sulfate – polyacrylamide gel electrophoresis of flagella from the thermophilic methanogen Methanococcus thermolithotrophicus indicated that they were composed of three major proteins, with molecular weights of 62 000,44 000, and 26 000, whereas all previously studied flagella of mesophilic methanogens consisted of two subunits. Proteins were isolated by preparative electrophoresis followed by complete removal of sodium dodecyl sulfate and their renaturation. It was shown that at least two of the proteins contain a thermostable domain whose complete denaturation proceeds only upon prolonged boiling in the presence of sodium dodecyl sulfate. Key words: flagellin, thermostability, archaebacteria, Methanococcus thermolithotrophicus.

EFFECTS OF MOLYBDENUM AND SULFUR ON MINERALS IN THE DIGESTIVE TRACT OF STEERS

1990 ◽  
Vol 70 (3) ◽  
pp. 905-920 ◽  
Author(s):  
L. S. GOLFMAN ◽  
R. J. BOILA
Keyword(s):  
Small Intestine ◽  
Key Words ◽  
Digestive Tract ◽  
Large Intestine ◽  
Terminal Ileum ◽  
Latin Square ◽  
Fecal Excretion ◽  
Apparent Digestibility ◽  
Slight Tendency ◽  
Design Effects

Four Holstein steers with cannulae in the rumen, proximal duodenum (PD) and terminal ileum (TI) were fed diets containing: (1) no added Mo or S; (2) Mo added at 10 mg kg−1; (3) S added at 3.0 g kg−1; and (4) Mo and S added at 10 mg and 3.0 g kg−1, respectively, in a Latin square design. Effects of Mo and S on minerals in the digestive tract of steers were evaluated. The solubility of Cu was lower with Mo (P < 0.01) and S (P < 0.01) at the PD and TI, and with Mo plus S (P < 0.05) at the TI. With Mo more (P = 0.07) Cu tended to be excreted in feces. Effects of Mo: Mn, reduced (P < 0.05) input to stomach region and higher (P < 0.01) absorption distal to PD; Zn, lower (P < 0.01) solubility at TI with less (P < 0.05) absorbed from large intestine (LI); Fe, more (P = 0.06) absorbed from LI with lower (P < 0.01) fecal excretion; P, lower (P < 0.05) input to stomach region with a tendency for less (P = 0.08) absorbed from small intestine (SI); Na, less (P < 0.05) absorbed from LI; K, lower (P < 0.05) apparent digestibility. Effects of S: Mn, slight tendency for higher (P = 0.10) absorption distal to PD; Zn, lower (P < 0.05) solubility at PD; P, less (P < 0.05) absorbed from SI and LI; Mg, tendency for less (P = 0.07) absorbed from stomach region and trend for more (P = 0.08) absorbed distal to PD. Minerals other than Cu were influenced by Mo and S in the digestive tract of cattle. Key words: Cattle, molybdenum, sulfur, digestion, minerals

scholarly journals IN VITRO DEGRADATION OF POLYDIOXANONE (PDO) LIFTING THREADS IN HYALURONIC ACID (HA).

2019 ◽  
Vol 10 (1) ◽  
pp. 1-13
Author(s):  
Dubraska Suárez ◽  
Gladys J Velazco de Maldonado ◽  
Reynaldo Ortiz ◽  
Victor Garcia-Guevara ◽  
Blanca Miller-Kobisher
Keyword(s):  
Hyaluronic Acid ◽  
Key Words ◽  
Structural Changes ◽  
Hydrolytic Degradation ◽  
Central Core ◽  
In Vitro Degradation ◽  
Central Column ◽  
Rate Of Hydrolysis

Background: Recently, some clinicians have proposed implanting PDO threads imbibed in hyaluronic acid (HA). However, this is controversial since PDO sutures are hydrophilic and the presence of HA could increase the rate of hydrolysis. Aim: To demonstrate the degradation of PDO lifting threads in HA through ultramicroscopy. Materials and methods: Three, one cm long, segments of 23G PDO threads, where immersed in 1.5 ml non-crosslinked hyaluronic acid in previously labeled, sterile microcentrifuge tubes. These were observed by ultramicroscopy at 4x and 10x after 24, 48 and 72 hours. Results: Microphotographs taken after 24 hours already show structural changes in the fibers, presenting an increase in interlaminar spaces and dilution of violet pigmentation. At 48 hours, degradation continues. PDO hygroscopy is observed as aqueous content between the peripheral layers and the central core of the thread. Some fibers show breakage, and there is an increase in interlaminar and interfibrillar spaces. At 72 hours, as the pigment is released, larger empty spaces are observed in the central column of the thread, and there is disorganization of the peripheral fibrils with fraying all along the fiber. Conclusions: Hyaluronic acid induces rapid biodegradation of the PDO thread by hydrolysis beginning 24 hours after contact of the thread with the biomaterial. We hypothesize that non-crosslinked hyaluronic acid is a powerful catalyzing agent for hydrolytic degradation of the PDO thread, since this thread is highly hydrophilic. Thus, we suggest that clinically embedding PDO threads with HA will only accelerate biodegradation of the suture. Key words: Lifting threads, polydioxanone, hyaluronic acid, biodegradation, PDO hydrolysis

scholarly journals La angustia, principio de posibilidad del conocimiento

2016 ◽  
Vol 1 (1) ◽  
pp. 30
Author(s):  
Carlos Fernando Álvarez-González
Keyword(s):  
Key Words ◽  
Structural Changes ◽  
Production Of Knowledge ◽  
The Moment ◽  
The Individual

ResumenEl presente artículo de reflexión pretende examinar y desarrollar el concepto de la Angustia –principalmente en Kierkegaard- como principio de posibilidad en la producción de conocimiento. El filósofo a trabajar define la angustia como el temor venido de la nada. La aproximación a dicho concepto se realizó a partir del desarrollo de las categorías de falta, remordimiento, arrepentimiento, libertad y culpa. La investigación facilita comprender el momento de elección del individuo al conocer, lo que puede llevar a cambios estructurales en su representación acerca de cómo se aborda el papel de la misma en la producción del conocimiento desde la culpa. Palabras Claves: Angustia, falta, libertad, culpa, conocimiento. AbstractThe present reflection article tries to examine and develop the concept of the Anguish - mainly in Kierkegaard – as a principle of possibility in the production of knowledge. The philosopher to work defines the anguish as the fear that comes from nothing. The approach to this concept was made from the development of the categories of lack, remorse, repentance, freedom and guilt. Research facilitates to understand the moment of choice of the individual upon knowing, which can lead to structural changes in their representation about how the role of the same in the production of knowledge from guilt is addressed. Research makes it easier to understand the moment of choice of the individual when it is known, which can lead to structural changes in their representation about how the role of the same in the production of knowledge from guilt is addressed. Key words: Anguish, knowledge, guilt,  lack, freedom Resumo Este artigo de reflexãotem por objetivo analisar  e desenvolver o conceito da Aflição -principalmente em Kierkegaard – como princípio de possibilidade na produção de conhecimento. O  filósofo define a aflição como o medo vindo do nada. A abordagem a este conceito foi baseado no desenvolvimento das categorias de fracasso, remorso, arrependimento, liberdade e culpa. A pesquisa facilita a compreensão do momento de escolha do indivíduo ao conhecer, o que pode levar a mudanças estruturais na sua representação sobre cómo abordar o papel da mesma na produção do conhecimento da culpa. Palavras chave:Aflição, fracasso, liberdade, remorso, conhecimento.

scholarly journals Cleavage of human von Willebrand factor by porcine pancreatic elastase

Blood ◽  
1989 ◽  
Vol 74 (2) ◽  
pp. 673-681
Author(s):  
MA Howard ◽  
T Greco ◽  
M Coghlan
Keyword(s):  
Von Willebrand Factor ◽  
Structural Changes ◽  
Polyacrylamide Gel Electrophoresis ◽  
Pancreatic Elastase ◽  
Molecular Weights ◽  
Sds Page ◽  
Porcine Pancreatic Elastase ◽  
Cofactor Activity ◽  
Von Willebrand ◽  
Willebrand Factor

von Willebrand factor (vWF) was purified from pooled normal plasma, radiolabeled with iodine then cleaved by porcine pancreatic elastase. Cleavage was monitored by sodium dodecylsulphate-polyacrylamide gel electrophoresis (SDS-PAGE), SDS-agarose electrophoresis, crossed immuno- electrophoresis, ristocetin and botrocetin cofactor activities, and ristocetin and botrocetin induced binding to fixed washed platelets. Cleavage of vWF by porcine elastase was dependent on both the concentration of porcine elastase and period of incubation. Incubation of vWF with concentrations of porcine elastase greater than 20 U/mL for 30 minutes resulted in loss of the 240 Kd vWF subunit and a corresponding loss of the high molecular weight multimers and formation of fragments with molecular weights on reduced SDS-PAGE of 150, 125, 115 Kd and minor bands at 44, 28, and 24 Kd and a band at 20 Kd, which increased in intensity as either the concentration of porcine elastase or the period of incubation increased. More than 50% of the ristocetin cofactor activity was lost during a five-minute incubation of vWF with 0.56 U/mL porcine elastase when no detectable structural changes in the vWF molecule had occurred. Botrocetin cofactor activity was more resistant. Similarly botrocetin induced vWF binding to platelets was retained by a fraction produced by digestion of vWF with porcine elastase, which contained predominantly a 20 Kd fragment of vWF. This fragment retained insignificant amounts of ristocetin related functions and therefore represents a useful piece of the vWF molecule for further exploration of the site involved in botrocetin induced binding to platelets.

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