The principle of the experiment is to join excessive K2Cr2O7 standard solution in water sample, the mixture of which reflux for 10 minutes while heating and boiling in strong acid, making K2Cr2O7 fully react with organic compound and reductive material,the reaction of which is K2Cr2O7-+ 14H++6e(?)
during saccharification, the use level of high protein barley controlled below 30 %, saccharification temperature dropped at 65 ℃, the proportion of dextrin and maltose as 1∶8.5, pH value of sweet mash and boiling wort as 5.4~5.6 and 5.2~5.4 respectively;
The results showed that inhibition rates of TBAS formation (TBASI) of corian der, leeks, green bean sprouts, fructus lycii and Vitamin C were 85 3%,71 7%,77 6%,94 6% and 90 3% respectively,which were higher than that of rape (65 1%) and cemery (56 7%) before boiling.
Results The positive detection rate of Mycobacterium tuberculosis from samples processed by bacterial DNA Mini kit was 100%,which was significantly higher than that of boiling(57.14%) and Chelex 100 resin(52.38%) treatment methods(P=0.0103,P=0.0233,respectively).
Method After the gene releaser added, the specimens were disposed by using the procedural heating, microwave disposing and boiled methods, respectively.
Original biogas liquid fermented for 60 d,the one treated at 60 ℃,and the one boiled and the one sterilized are fostered with pathogens for 3 d,the inhibition rates are respectively 61.5%,51.3%,48.7% and 5.1%.
The result showed the optimal flavor compound beverage as the following:the weight of the water is decuple as much as kelp,dosage of citric acid is 0.5 %,seethe for 30 min,using chrysanthemum tea,apple juice to kelp extract of 7:3.
Cultured on MS medium with 0.02mg/L, 4.0 mg/L 6-BA and 0.05mg/L NAA, the explants differentiated and directly formed tubercles and shoots, and monthly propagation index was 4~6, while on 1/2 MS medium with 0.5mg/L NAA, 0.05mg/L 6-BA and 0.2% coal, roots of plantlets formed ease.
(4) Several replacable additives of formaldehyde were studied, adding V_A30mg/L、V_B30mg/L、V_A&V_B、HD-1~#60mg/L, HR can have good result, however, V_A&V_B and HR are better.
Based on the experiments, it was found that heat transfer enhancement of the internally ribbed tube could postpone departure from nucleate boiling at the sub-critical pressure.
At supercritical pressure, the temperature difference between the wall and the fluid increased near the pseudo-critical temperature, but the increase of wall temperature was less than that of departure from nucleate boiling at sub-critical pressure.
The experimental results show that temperature and chloride content in the feed have significant influence on the volatility of heavy metals, especially those of lower boiling point such as Hg, Cd and Zn.
When boiled in dimethyl sulfate, bis(benzimidazole-2-N-phenylcarbothioamidato)copper(II) forms copper(II) complexes containing N-phenylbenzimidazole-2-(S-methylcarboisothioamide).
Most of the chlorophyll a derivatives studied form nickel complexes when boiled in toluene with an equimolar amount of nickel acetylacetonate in high yield.
4 (p-Chlorobenzoyl) amino 1, 9, Anthrapyrimidine (Indanthrene Yellow 7 GK; C. I. Vat Yellow 29) can be easily synthesized from 1, 4, diaminoanthraquinone by refluxing with excess formamide and followed by acylating with pchlorobenzoyl chloride. 1, 4 Diaminoanthraquinone (40g.) was heated to 140-150° with 200g. of formamide and 10 g. of nitrobenzene for 13 hours. The resulted crude 4, Amino-anthrapyrimidine was purified by treatment with Cone. H_2SO_4, precipitated the sulfate by addition of H_2O, and neutra...
A definite type of hydrometer with linear and fine stem and parabolic bulb is suggested.Before measurement,the hydrometer should be well calibrated. The contents of soil particles of different size can be directly determined at different time after sedimentation of particles. Grinding the soil sample for five minutes is available for mechanical dis- persion of soil particles.60 ml of 0.5 N NAPO_3 for 50 grams of soils is suggested for calcareous soils and 60ml of 0.5 N NaOH for 50 grams of soils is suggeste...
A rapid method for the determination of CaO and MgO in Hematite is proposed. The sample sintered with a mixture of Na2CO3 and K.2CO3 and boiled in 2N HNO3 to dissolve the Lime and Magnesia. The extract is treated with urea to precipitate the small amount of Iron dissolved. The sum of CaO and MgO is determined by titration with ethylenediamine tetracetic acid (disodium salt). Lime is determined after precipitation as the oxalate and MgO is found by difference. Or alternatively, Magnesia is determined colorim...