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7 results on '"Beta hydroxy acid"'

1. Salicylic acid and antitranspirant polymer mitigate the effects of water stress on the growth and yield of cowpea

Author

Anderson Carlos de Melo Gonçalves, Caio da Silva Sousa, Alex Serafim de Lima, Toshik Iarley da Silva, José de Anchieta Alves de Albuquerque, Evandro Franklin de Mesquita, Thiago Jardelino Dias, Walter Esfrain Pereira, José Maria Arcanjo Alves, Leandro Torres de Souza, and Aloisio Alcantara Vilarinho

Subjects
Beta hydroxy acid, Phytohormones, Plant hormones, Agriculture
Abstract

Water stress can limit the growth and production of cowpea (Vigna unguiculata (L.) Walp.), necessitating the use of strategies that induce plant tolerance to mitigate its effects on the crop. This includes the application of salicylic acid (SA) and antitranspirant polymer (AP). The objective of this study was to evaluate the effect of SA and AP applications on the growth and production of cowpeas subjected to water stress. The experiment was conducted in field conditions at Sítio Boqueirão, Catolé do Rocha, Paraíba, Brazil. The experimental design used was randomized blocks, comprising 10 treatments with four replications. The evaluated treatments included nine combinations generated according to the Central Composite Design experimental matrix, involving five doses of SA and five doses of AP applied to plants under water stress, along with an additional treatment (without water stress and application of SA and AP). The assessed variables included morphological parameters and yield. The data were subjected to canonical correspondence analysis and confidence ellipses. The application of SA and AP increased growth (summer and spring) and productivity (summer). However, in spring, there was a decrease in productivity and an increase in the number of days until the initiation of pod harvesting in cowpeas under water stress.

Published
2024
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2. Salicylic acid and antitranspirant polymer mitigate the effects of water stress on the growth and yield of cowpea.

Author

de Melo Gonçalves, Anderson Carlos, da Silva Sousa, Caio, Serafim de Lima, Alex, Iarley da Silva, Toshik, de Anchieta Alves de Albuquerque, José, Franklin de Mesquita, Evandro, Jardelino Dias, Thiago, Esfrain Pereira, Walter, Arcanjo Alves, José Maria, Torres de Souza, Leandro, and Alcantara Vilarinho, Aloisio

Subjects
*HYDROXY acids, *SALICYLIC acid, *SPRING, *WATER shortages, *PLANT hormones, *COWPEA
Abstract

Water stress can limit the growth and production of cowpea (Vigna unguiculata (L.) Walp.), necessitating the use of strategies that induce plant tolerance to mitigate its effects on the crop. This includes the application of salicylic acid (SA) and antitranspirant polymer (AP). The objective of this study was to evaluate the effect of SA and AP applications on the growth and production of cowpeas subjected to water stress. The experiment was conducted in field conditions at Sítio Boqueirão, Catolé do Rocha, Paraíba, Brazil. The experimental design used was randomized blocks, comprising 10 treatments with four replications. The evaluated treatments included nine combinations generated according to the Central Composite Design experimental matrix, involving five doses of SA and five doses of AP applied to plants under water stress, along with an additional treatment (without water stress and application of SA and AP). The assessed variables included morphological parameters and yield. The data were subjected to canonical correspondence analysis and confidence ellipses. The application of SA and AP increased growth (summer and spring) and productivity (summer). However, in spring, there was a decrease in productivity and an increase in the number of days until the initiation of pod harvesting in cowpeas under water stress. [ABSTRACT FROM AUTHOR]

Published
2024
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3. A Case of Ichthyosis Vulgaris and the Use of 70% Glycolic Acid Chemical Peels for Management.

Author

Palmer V and Dunwell P

Abstract

Ichthyosis vulgaris is the most common of the inherited ichthyoses, with a semi-autosomal dominance. Approximately 37-50% of people affected have associated atopic eczema and a similar proportion have atopic relatives. In this case report, we present a 15-year-old female with a history of atopic eczema who clinically presented with asymptomatic, brown, scaly patches on the extensor surfaces of the lower limbs and flexural surfaces of the upper limbs, sparing the flexural creases on all limbs. She also had neck, abdominal, and mild truncal involvement. A clinical diagnosis of ichthyosis vulgaris was made and the differential diagnoses of X-linked recessive ichthyosis, pityriasis rubra pilaris, and xerotic dermatitis were entertained. While waiting for the histological report, she was maintained on 5% glycerine in aqueous cream for daily moisturizing with alternating nightly applications of 10% glycolic acid lotion and a 5% salicylic acid mixture. The diagnosis of ichthyosis vulgaris was confirmed by histopathological findings of hyperkeratosis and an absent granular layer. She then received a 70% glycolic acid in-office chemical peel on the abdomen to test for the cosmetic outcome. The glycolic acid peel was approximately 90% efficacious in reducing the hyperkeratinization and is recommended as an adjunctive biannual maintenance regime in combination with other topical therapies such as daily emollients, topical alpha/beta hydroxy, and/or urea compounds., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2022, Palmer et al.)

Published
2022
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4. Clinical tolerance and efficacy of capryloyl salicylic acid peel compared to a glycolic acid peel in subjects with fine lines/wrinkles and hyperpigmented skin

Author

Christian Oresajo, Margarita Yatskayer, and Isabelle Hansenne

Subjects
Adult, medicine.medical_specialty, Dermatology, Hyperpigmented skin, Administration, Cutaneous, chemistry.chemical_compound, Keratolytic Agents, Chemexfoliation, Hyperpigmentation, Humans, Medicine, Single-Blind Method, CAPRYLOYL SALICYLIC ACID, Glycolic acid, Facial hyperpigmentation, business.industry, Anti-Inflammatory Agents, Non-Steroidal, Middle Aged, Salicylates, Glycolates, Skin Aging, Treatment Outcome, Beta hydroxy acid, chemistry, Patient Satisfaction, Chemical agents, Drug Therapy, Combination, Female, medicine.symptom, Hydroxy Acids, business, Salicylic acid
Abstract

Summary Background Several chemical agents are currently used to perform superficial peels of the face to reduce facial hyperpigmentation and fine lines/wrinkles. Some of the most commonly used agents are alpha hydroxyl acids, such as glycolic acid (GA), or beta hydroxy acid, such as salicylic acid. Aim This study aims to compare the efficacy of GA to that of a novel derivative of salicylic acid, capryloyl salicylic acid (LHA). Subjects/Methods In a split-face study, 50 female volunteers between the ages of 35 and 60 years with mild to moderate facial hyperpigmentation and fine lines/wrinkles were randomized and LHA or GA peel was applied to one side of the face. Increasing peel concentrations were applied (5 ‐10% LHA or 20 ‐ 50% GA) based on the tolerance level of the subjects and clinical observations of an expert dermatologist for 12 weeks at biweekly intervals. Results Of the 44 volunteers who completed the study, at 12 weeks 41% of LHA-treated and 30% of GA-treated subjects demonstrated significant reduction of fine lines/wrinkles compared to baseline. Forty-six percent of LHA-treated subjects and 34% of GA-treated subjects showed significant reduction of hyperpigmentation compared to baseline. LHA treatment was better than GA peels, although there were no statistically significant differences between the two groups. Conclusions Five percent to 10% of LHA peel is generally safe and as effective as 20 ‐ 50% GA peel in reducing facial hyperpigmentation and fine lines/wrinkles.

Published
2008
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5. Reduction of substituted .DELTA.2-isoxazolines. Synthesis of .beta.-hydroxy acid derivatives

Author

Susan A. Scanga, Dennis P. Curran, and Christopher J. Fenk

Subjects
Reduction (complexity), chemistry.chemical_compound, Delta II, Beta hydroxy acid, chemistry, Organic Chemistry, Organic chemistry, Aliphatic compound, Cycloaddition, Styrene
Abstract

Scission des (t-butyl-3dialkyl) isoxazolines-2 produisant des (dimethyl-2,2 hydroxy-5) alcanones-3(I). L'oxydation selon Baeyer Villiger de (I) conduit aux β-hydroxyesters

Published
1984
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6. Biosynthesis of Valine and Isoleucine

Author

A N Radhakrishanan, Esmond E. Snell, and R P Wagner

Subjects
Alpha (ethology), Cell Biology, Reductase, Biochemistry, chemistry.chemical_compound, Beta hydroxy acid, chemistry, Biosynthesis, Valine, 3-Methyl-2-Oxobutanoate Dehydrogenase (Lipoamide), Keto acid, Beta (finance), Molecular Biology
Published
1960
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7. Genetic and physiochemical studies on beta-hydroxy acid dehydrogenase in Anopheles albimanus

Author

J. A. Seawright and S. Narang

Subjects
Male, Dehydrogenase, Biology, Biochemistry, Cofactor, chemistry.chemical_compound, Anopheles albimanus, Anopheles, Genetics, Animals, Molecular Biology, Ecology, Evolution, Behavior and Systematics, Crosses, Genetic, Thermostability, chemistry.chemical_classification, Recombination, Genetic, Homozygote, Chromosome Mapping, General Medicine, biology.organism_classification, Molecular biology, Enzyme, chemistry, Chromosome 3, Beta hydroxy acid, Mutation, biology.protein, Phosphoglucomutase, Carbohydrate Dehydrogenases, Female
Abstract

beta-Hydroxy acid dehydrogenase (beta-Had-2) of Anopheles albimanus was assigned to chromosome 3. The apparent sequence of loci on chromosome 3 is hexokinase-1--22--stripe--28--beta-hydroxy acid dehydrogenase-2--4--aldehyde oxidase--2--esterase-8--4--esterase-4--?--phosphoglucomutase--?--esterase-6. beta-Hydroxy acid dehydrogenase is 25 and 30 map units from phosphoglucomutase and esterase-6, respectively. The one-band electromorph of beta-Had-2 in homozygotes and the three-band type in heterozygotes suggest that the enzyme is a dimer. A variety of electrophoretic techniques and spectrophotometric analysis were used to determine if the allozymes of beta-Had-2 can be differentiated on a basis other than mobility. No differences were detected among the allozymes on the basis of thermostability, urea denaturation, response to thiol reagents, chelating agents, or changes in coenzyme and substrate concentrations. No heterogeneity within allozymes separated by electrophoresis was detected by using thermostability tests.

Published
1983

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