Potassium hydroxide

The reaction between salicylaldehyde and ethyl chloroacetate in DMF formed ester ethyl benzofuran-2- carboxylate 2, followed by the treatment with hydrazine hydrate to afford benzofuran-2-carbohydrazide 3, with carbon disulfide, potassium hydroxide and hydrazine hydrate formed 4-amino-5-(benzofuran-2-yl)-1,2,4- triazole-3-thiol 4a which existed in the mixture of two tautomers (thiol form 4a and thione form 4b).

3p viclerkmaxwel 16-02-2022 12 2   Download

In this study, studied the use of bagasse as a precursor to synthesize activated carbon for CIP treatment in water. Bagasse after carbonization is activated chemically, followed by potassium hydroxide (KOH) and heated at a temperature of 500 °C in a nitrogen furnace.

10p cothumenhmong9 04-01-2021 15 2   Download

The aim of this study was to assess the effect of oral ingestion of honey as an adjuvant therapy in acute ingestion of potassium hydroxide in adult male albino rats.

14p trinhthamhodang1216 19-11-2020 11 2   Download

Dermatophytes are a group of closely related keratinophilic fungi that can invade keratinized humans and animals tissues such as skin, hair and nails causing dermatophytosis. They are an important cause of superficial fungal infection. Conventional methods like potassium hydroxide (KOH) direct microscopy and fungal culture lacks the ability to make an early and specific diagnosis, as it takes about four weeks for the culture to grow on Sabourauds dextrose agar.

5p kethamoi4 18-04-2020 17 1   Download

Fungal infections or mycoses are classified as Superficial, Subcutaneous, and Systemic depending on the degree of invasion of the host. Superficial fungal infections are most common in tropical and subtropical countries. Superficial fungal infections of the skin are one of the most common dermatological conditions seen in clinical practice. It affects 20- 25% of the population. In this study, 1473 Suspected superficial fungal infection cases were identified among approximately 3500 patients screened during August 2017 to August 2019.

7p trinhthamhodang1212 06-04-2020 28 1   Download

The use of phosphate solubilizing bacteria (PSB) as biofertilizers has concurrently increased phosphate uptake in plants and improved crop yield in several crops. A laboratory study was conducted to isolate, identify, and characterize the phosphate solubilizing bacteria from different crop soils. The population of PSB was higher in the rhizosphere soil of maize. Preliminary selections as PSB were done on the basis of formation of transparent zone around the colony on Pikovaskaya’s agar medium. The isolated PSB were identified by their morphological and biochemical properties.

4p caygaocaolon2 11-03-2020 24 2   Download

In the present study 86 number of skin scrapings were collected from various breeds like Labrador retriever (n=32), German shepherd (n=21), Spitz (n=9), Dacshund (n=16), Mastiff (n=5), Boxer (n=3) and age groups from 6 months to, above 3 year with characteristics ring like lesions, alopecia, irregular patches of hair loss. All the dogs were presented to teaching veterinary clinical complex, Odisha veterinary college from December 2018 to June 2019.On routine identification of fungus out of 86 number of skin scrappings it was revealed that arthospores were present in 54 number of samples.

6p cothumenhmong3 22-02-2020 16 1   Download

Onychomycosis is a fungal infection of the finger or toe nail caused by various fungal agents like dermatophytes, non dermatophytes moulds and yeasts. It is necessary to diagnose the infection with proper laboratory evidences before treating them with antifungal drugs, which require prolonged duration of treatment and may have adverse side effects. This study involves comparison of standard laboratory tests in the diagnosis of onychomycosis, namely, potassium hydroxide mount (KOH mount), Calcofluor white staining and fungal culture of the nail clippings.

6p trinhthamhodang3 14-02-2020 22 1   Download

Bioethanol is one of the promising alternative fuels to gasoline in the transport sector. Ethanol may be produced either from petroleum products or from biomass. In the world around 80% of the ethanol produced is still obtained from fermentation and the reminder comes largely by synthesis from the petroleum product ethylene (Tanaka, 2006). Cotton stalks have been regarded as potential sources for cellulosic ethanol production owing to their high cellulose content being almost 37% (Binod et al., 2012).

11p cothumenhmong1 11-12-2019 17 1   Download

This study present the optimize conditions for preparation of durian peel activated carbon (DPAC) for removal of methylene blue (MB) from synthetic effluents. The effects of carbonization temperature (from 673K to 923K) and impregnation ratio (from 0.2 to 1.0) with potassium hydroxide KOH on the yield, surface area and the dye adsorbed capacity of the activated carbons were investigated.

10p queencongchua3 09-09-2019 16 0   Download

A strain of Pseudomonas sp. C-171 capable of tolerating hexavalent chromium (Cr+6) up to 2000 ppm as potassium dichromate was isolated from domestic sewage. The Cr+6 reduction was checked by growing the isolated strain in a medium containing potassium dichromate as Cr+6 source.

6p vitamix 15-02-2019 15 1   Download

In this study, we have used the potassium hydroxide (KOH) as an eco–friendly and favorable activating agent to develop the porous and defect structure of activated carbon. Otherwise, the response surface methodology (RSM) has been applied to investigate the effects of the adsorption parameters including initial concentration, adsorbent dosage, and pH of solution on the percentage of Cu2+ removal.

9p cumeo3000 01-08-2018 22 0   Download

Two derivatives of 2-thioxoquinazolin-4(3H)-one including compounds 3 and 5 were synthesized by cyclization reaction of anthranilic acid with ethyl isothiocyanate and phenyl isothiocyanate, respectively. Eight novel derivatives of 2-thioxoquinazolin-4(3H)-one including compounds (7a-h) were synthesized by cyclization reaction of derivatives of anthranilic acid with aromatic amines and carbon disulfide in potassium hydroxide/methanol. The obtained compounds were structurally determined by IR, MS, 1 H NMR and 13 C NMR analysis method.

6p uocvong03 24-09-2015 42 3   Download

Two chemical treatments were applied to jute fibers to create a better bonding of fiber to resin in natural composite materials. The jute fibers have been treated with hydroxide potassium (KOH) and a bleaching agent, canxi hypochlorite (Ca(OCl)2.4H2O), in varying periods. Characterization techniques such as FT-IR, SEM were used to evaluate the effect of chemical treatments on fiber structure. After treatment the surface topography of jute was clean and microfibrils were revealed, these lead to an enhancement in mechanical properties and interfacial strength between jute fiber and PP.

8p uocvong01 24-09-2015 68 6   Download

Mục tiêu của nghiên cứu là nhằm xây dựng một quy trình tối ưu hóa cho việc sản xuất biodiesel từ dầu thầu dầu thông qua phản ứng transester hóa với xúc tác base. Phản ứng được thực hiện dưới sự thay đổi các thông số như: tỷ lệ mol methanol: dầu (4:1-8:1), nồng độ chất xúc tác (0.25-1.50%), nhiệt độ (40-60C) và thời gian phản ứng (45-150 phút). Hiệu suất cực đại của phản ứng đạt được tại các điều kiện: tỷ lệ mol methanol:dầu, 6:1; nồng độ xúc tác potassium hydroxide, 0.5%; tốc độ khuấy trộn, 500 vòng/phút; nhiệt độ phản ứng 60oC và...

9p sunshine_4 18-07-2013 124 16   Download

136 A. Singh et al. 5.2.4 Soil Microcosms One of the simplest methods requiring minimal equipment for soil biodegradation studies is with use of a biometer flask (Bellco, Vineland, NJ, USA). The United Sates Environmental Protection Agency (US EPA) and Organization of Economic Cooperation and Development (OCED) have also recommended this method (OECD 1981; McFarland et al. 1991; Skladany and Baker 1994). Biodegradation activity can be evaluated by directly monitoring the loss of the target compounds or indirectly by measuring by-products of biodegradation or electron acceptor consumption.

37p longdencachep 19-09-2011 63 4   Download