scholarly journals The effects of aqueous neutral-salt solutions on the melting temperatures of deoxyribonuclcic acids

Biopolymers ◽  
1971 ◽  
Vol 10 (6) ◽  
pp. 1103-1103
Author(s):  
Dieter W. Gruenwedel ◽  
Cih-Hsia Hsu ◽  
Don S. Lu
Keyword(s):  
Neutral Salt ◽  
Salt Solutions ◽  
Melting Temperatures

The effects of aqueous neutral-salt solutions on the melting temperatures of deoxyribonucleic acids

Biopolymers ◽  
1971 ◽  
Vol 10 (1) ◽  
pp. 47-68 ◽  
Author(s):  
Dieter W. Gruenwedel ◽  
Chi-Hsia Hsu ◽  
Don S. Lu
Keyword(s):  
Neutral Salt ◽  
Salt Solutions ◽  
Melting Temperatures

scholarly journals The effects of aqueous neutral-salt solutions on the melting temperatures of deoxyribonuclcic acids

Biopolymers ◽  
1971 ◽  
Vol 10 (5) ◽  
pp. 941-941 ◽  
Author(s):  
Dieter W. Grunwedel ◽  
Chi-Hsia Hsu ◽  
Don S. Lu
Keyword(s):  
Neutral Salt ◽  
Salt Solutions ◽  
Melting Temperatures

scholarly journals Effect of pyrolysis temperature on Si release of alkali-enhanced Si-rich biochar and plant response

Biochar ◽  
2021 ◽  
Author(s):  
Meng Wang ◽  
Negar D. Tafti ◽  
Jim J. Wang ◽  
Xudong Wang
Keyword(s):  
Rice Straw ◽  
Rice Husk ◽  
Pyrolysis Temperature ◽  
Weak Acid ◽  
Rice Grain ◽  
Neutral Salt ◽  
Salt Solutions ◽  
Plant Disease Control ◽  
Si Content ◽  
Lower Temperature

AbstractRecent studies have shown that silicon (Si) dissolution from biochar may be influenced by the pyrolysis temperature. In addition, the enhancement of biochar by treatment with alkali has been proposed to produce a Si source that can be used for environmentally friendly plant disease control. In this study, biochars from rice straw and rice husk pretreated with KOH, CaO and K2CO3 and then pyrolyzed at 350, 450 and 550 °C were prepared to evaluate the effects of pyrolysis temperature on Si release and plant uptake from alkali-enhanced Si-rich biochar. Extractable Si and dissolution Si from the prepared biochars were assessed by different short-term chemical methods and long-term (30-day) release in dilute acid and neutral salt solutions, respectively, along with a rice potting experiment in greenhouse. For both rice straw- and husk-derived alkali-enhanced biochars (RS-10KB and HS-10K2B, respectively), increasing the pyrolysis temperature from 350 to 550 °C generally had the highest extractable Si and increased Si content extracted by 5-day sodium carbonate and ammonium nitrate (5dSCAN) designated for fertilizer Si by 61–142%, whereas non-enhanced biochars had more extractable Si at 350 °C. The alkali-enhanced biochars produced at 550 °C pyrolysis temperature also released 82–172% and 27–79% more Si than that of 350 °C produced biochar in unbuffered weak acid and neutral salt solutions, respectively, over 30 days. In addition, alkali-enhanced biochars, especially that derived from rice husk at 550 °C facilitated 6–21% greater Si uptake by rice and 44–101% higher rice grain yields than lower temperature biochars, non-enhanced biochars, or conventional Si fertilizers (wollastonite and silicate calcium slag). Overall, this study demonstrated that 550 °C is more efficient than lower pyrolysis temperature for preparing alkali-enhanced biochar to improve Si release for plant growth.

scholarly journals STUDIES ON THE FORMATION OF COLLAGEN

1958 ◽  
Vol 107 (2) ◽  
pp. 265-277 ◽  
Author(s):  
Jerome Gross
Keyword(s):  
Growth Rate ◽  
Weight Gain ◽  
Guinea Pigs ◽  
Caloric Intake ◽  
Neutral Salt ◽  
Salt Solutions ◽  
Citrate Buffer ◽  
Continuous Growth ◽  
Dermal Collagen ◽  
Low Levels

The total amount of neutral salt-extractible collagen in the skin of growing, suckling guinea pigs amounted to about 10 per cent of the total collagen of the dennis. This is roughly equivalent to a 1 to 2 day increment in dermal collagen incident to growth. Fourteen days of static weight maintained by limited caloric intake reduced the neutral salt-extractible collagen to very low levels. Following this period, 5 to 7 days of steady weight gain induced by ad lib. feeding was required to produce significant increases in this collagen fraction. Return to control levels occurred within 12 days of continuous growth. The amount of collagen extracted from the dermis of young guinea pigs with cold neutral salt solutions varied directly with growth rate (weight gain) and was greatly diminished after short periods of restricted caloric intake. Two days of fasting diminished the total extracted collagen by one-half. Three consecutive extractions with citrate buffer pH, 3.5, of the residues remaining after exhaustive saline extraction removed 40 per cent more collagen from the skins of actively growing animals than from those of animals fasted for 2 days. However, subsequent extraction of residues with dilute acetic acid equalized the total amount of collagen extracted at acid pH from the two groups. The viscosity of cold neutral extracts was unrelated to the concentrations of non-collagenous proteins and carbohydrates but varied directly with the collagen content.

scholarly journals THE HYDROLYSIS OF ETHYL ACETATE BY NEUTRAL SALT SOLUTIONS.

1913 ◽  
Vol 35 (4) ◽  
pp. 396-418 ◽  
Author(s):  
William E. Henderson ◽  
David R. Kellogg
Keyword(s):  
Ethyl Acetate ◽  
Neutral Salt ◽  
Salt Solutions ◽  
Hydrolysis Of

scholarly journals Chemical changes associated with aging of collagen in vivo and in vitro

1969 ◽  
Vol 112 (4) ◽  
pp. 397-405 ◽  
Author(s):  
Kalindi Deshmukh ◽  
Marcel E. Nimni
Keyword(s):  
Absorption Spectrum ◽  
Neutral Salt ◽  
Unsaturated Aldehyde ◽  
Salt Solutions ◽  
Rat Skin ◽  
Soluble Collagen ◽  
Insoluble Collagen ◽  
Cross Links

Collagen extracted from rat skin by neutral-salt solutions contains less aldehydes than the more insoluble collagen fractions. The concentration of aldehydes in collagen is directly related to its capacity to form stable cross-linked gels, which do not redissolve on cooling and become more insoluble in a variety of reagents. Whereas the absorption spectrum of neutral-salt-soluble collagen treated with N-methylbenzothiazolone hydrazone resembles that of acetaldehyde, the more insoluble collagen fractions show increasing amounts of a component that behaves like an αβ-unsaturated aldehyde. The ratio between α- and β-sub-units present in a particular fraction of soluble collagen seems to be constant and independent of the age of the animal. Neutral-salt-soluble collagen, which has a low concentration of β-components, will generate intramolecular bonds if gelled at 37°. These intramolecular bonds seem to precede the formation of stable intermolecular cross-links, since these gels can redissolve when cooled to yield a soluble collagen with a higher content of β-components of intramolecular origin.

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