The use of chemicals

In the study, the total nitrogen content of natural rubber was determined to evaluate the effectiveness of deproteinization on the synthesis of chemically modified rubber materials. The remaining protein content in the obtained deproteinized natural rubber (DPNR) was analyzed as nitrogen content using the Kjeldahl method.

8p visarada 28-04-2025 1 1   Download

In this study, we investigated some conditions affecting the extraction of total carotenoids from R. mucilaginosa using environmentally friendly chemicals: cell disruption conditions with organic acids combined with ultrasound-assistant method, using ethanol and petroleum ether solvents to replace acetone in the process of extracting total carotenoids to obtain a benign product, easy to apply in food.

8p viling 11-10-2024 2 1   Download

Silver nanoparticles (Ag NPs) were synthesized and characterized by transmission electron microscopy (TEM), X-ray powder diffraction (XRD), and absorption spectroscopy. Using Debye-Scherrer’s formula and the result of the XRD spectrum, the size of the Ag NPs was estimated at approximately 8 nm.

7p viengfa 28-10-2024 1 1   Download

The present paper also includes strength prediction models that consider the influence of curing temperature. In addition, the Thermogravimetry analysis (TGA) used to determine the chemically bound water content in cement-treated soil and the X-ray diffraction (XRD) test to explain the chemical mechanism in cement-treated soil are also mentioned.

18p viengfa 28-10-2024 4 2   Download

Ocimum africanum L. is a distinctive Vietnamese herb, especially common in Tuy Hòa, Phú Yên. This study focuses on extracting and analyzing the chemical composition of the essential oil derived from the leaves of Ocimum africanum. The essential oil was extracted using the steam distillation method and its chemical composition was analyzed using gas chromatography-mass spectrometry (GC-MS).

7p viaburame 14-03-2025 3 1   Download

Phosphorus (P) is essential for plant growth, but most of it in soil is insoluble and unavailable to plants. To increase crop yields, farmers use chemical fertilizers, causing soil pollution from the accumulation of insoluble P. Beneficial microorganisms called phosphorus-solubilizing microorganisms (PSMs) can change insoluble organic and inorganic phosphorus compounds into forms that plants can absorb. This article seeks to deepen knowledge of how PSM can improve plant growth, decrease soil phosphorus contamination, and contribute to the future of sustainable agriculture.

11p viaburame 14-03-2025 5 1   Download

In the present work, CeO2 with different loading was embedded on reduced graphene oxide (rGO) by a simple one-pot hydrothermal method. The synthesized samples were characterized using XRD, EDX mapping, FESEM, and UV-Vis DRS techniques.

11p vifilm 11-10-2024 4 1   Download

This study aimed to investigate the current use of drugs, chemicals, herbs, and herbal extract products in grow-out farms of snakehead (Channa striata) and Pangasius catfish (Pangasianodon hypophthalmus) in the Mekong Delta, Vietnam.

9p vibecca 01-10-2024 3 1   Download

Pesticides (mainly herbicides, insecticides, and fungicides) are used to chemically combat certain plants, animals, or microorganisms perceived as harmful to agriculture. Due to the fundamental similarities in all living beings, it is challenging to target unwanted species without affecting others, including humans.

16p viyoko 01-10-2024 9 1   Download

Phytochemical study of Knema saxatilis stems led to the isolation of six known compounds. Their chemical structures were determined as 8-hydroxy eriodictyol (1), (2S)-7-hydroxy-3′,4′-methylenedioxideflavan (2), sitostenone (3), protocatechuic acid (4), 4-hydroxybenzoic acid (5) and vanillin (6) using NMR and MS spectral data.

7p viyoko 01-10-2024 2 1   Download

Chamaecrista pumila has empirically been used to treat inflammation-associated complications. However, the molecular mechanism and chemical components underlying the anti-inflammatory activity of this medicinal plant are poorly understood. Hence, the present study aimed to identify main bioactive compounds from the ethyl acetate fraction of C. pumila extract, which was demonstrated to possess the strongest anti-inflammatory effect in a previous study, and provide mechanistic insights into modulation of inflammatory responses by the compound of interest.

13p vihyuga 04-03-2025 3 1   Download

The research is motivated by the growing interest in using natural products for biopolymer engineering, particularly in developing bioactive and biocompatible materials. Genipin, a natural blue colorant precursor, has garnered attention due to its unique chemical structure and crosslinking properties with natural polymers.

11p viinuzuka 28-02-2025 5 1   Download

Nowadays, there are many factors causing the decrease of male reproductive function such as diet, routine, chemical, ... But some of them have not been paid appropriate attention to, especially the use of paracetamol, which has a significant negative effect on the reproductive process. In this study, we will summarize the results of several studies on the harmful effects of prolonged high-dose use of paracetamol on sperm number, quality, portability and testicular morphology in experimental animals and humans.

15p vinara 11-01-2025 6 1   Download

Buxus latistyla Gagnep. (Buxaceae) has been used as a remedy for treating malaria, haemoptysis, amoebic dysentery etc. However, its chemical constituents are still unknown. Thus, the aim of this study was to identify phytochemicals isolated from this plant.

7p viharuno 03-01-2025 7 2   Download

INTRODUCTION Contrary to popular belief, pharmacy is not limited to counting and dispensing pills. Pharmacy is a rewarding profession in the health care system that involves working closely with doctors and patients. No matter what health field you step into, there will always be a need for pharmacists. They provide their expertise on the composition, use, and manufacturing of a drug, as well as its physiological and chemical interactions. Pharmacy offers flexible work schedules, a broad spectrum of opportunities, direct patient contact, and top salaries right out of college!...

30p mailan1977 29-03-2013 142 18   Download

The article investigates the potential of using sea sand and seawater from Ha Tien City, Kien Giang Province, in geopolymer concrete production. Geopolymer concrete is an environmentally friendly material that can help reduce greenhouse gas emissions while utilizing locally available resources.

5p vibenya 31-12-2024 11 2   Download

This study investigated the in vitro effects of ZnO NP and chemical UV filters commonly used sunscreens on the function of immortalised and primary skin cells. ZnO particulates (30 nm, 80 nm and 200 nm) were compared to the chemical UV filters: butylmethoxydibenzoylmethane (BMDBM) ethylhexylmethoxycinnamate (EHMC), ethylhexylsalicylate (EHS), homomenthylsalicylate (HMS) and 4-methylbenzylidenecamphor (MBC). Human epidermal keratinocytes (NHEK), epidermal melanocytes (NHEM), dermal fibroblasts (NHDF) and the immortalised keratinocyte HaCaT cell line were used in this study.

324p runthenight05 01-03-2023 14 3   Download

The specific research objectives of this study are: 1. The development of a high throughput method for evaluation of alloys (5xxx Al as model materials in this work) subject to pitting; 2. Understanding the roles of variation in functional groups' in determining the inhibition efficiency; 3. Elucidating the inhibition mechanisms; and 4. Unveiling the role of intermetallic present in Al matrix and their contribution to the inhibition mechanism, particularly the long-term durability of the inhibitor systems.

104p runthenight04 02-02-2023 16 2   Download

The study "Studies on film forming corrosion inhibitors on aluminium alloy, AA2024-T3" presents key aspects of the film forming behaviour of the selected inhibitors and the test methods used to evaluate the inhibitor induced films in a chloride solution. This study also aims to provide significant insights to the film tenacity, the influence of the molecular structure as well as the film stability in the absence of inhibitors to provide a deeper understanding of the film forming and film breakdown mechanisms.

154p runthenight04 02-02-2023 17 2   Download

The purpose of this research was to investigate the technological feasibility of biological filtration process for Mn control in Lorne WTP. This thesis consists of eight chapters. Project background and research objectives are described in Chapter 1. Chapter 2 presents an extensive literature review covering the nature of manganese, manganese analytical methods, manganese control methods, the nature of MOB and biological control of Mn in drinking water treatment. The materials and methods used throughout the experimental investigation for this study are described in Chapter 3.

119p runthenight04 02-02-2023 13 3   Download